DE1925032A1 - Automatic turret lathe - Google Patents

Description

. W. Dipl.-Ing PAAP 1 C | 9 E ft ^ 3 * ^{MDNCHEN 22} '

Dipl.-Ing. H. MITSCHERUCH 196VVJt ^^ f

Dipl.-Ing. K. 6UNSGHMANN
Dr. rr ηαί. W. KORBER PATENT AGENCIES

Blooafield Glens Road Birmingham, Miohigan, 7th St.A.

Patent application Automatic turret lathe

The invention also relates to improvements in automatic turret lathes.

The tool slide is usually made with the help of the automatic turret lathes known up to now advanced by cams and returned by a .spring, wherein the cam is in contact with a cam roller mounted on the tool carriage · becomes the cam rotated, an increase in the cam has the effect that the tool slide is advanced towards the workpiece in the direction while a recess in the cam allows the spring to retract the tool base against the workpiece. (Depending on its task, the tool slide carries a rotatable turret head with several son tools, and the turret head can execute index movements in order to bring the tools one after the other into their working position relative to the workpiece Tool slide perform three basic movements from its rest or starting position, if in each case a tool is to be brought into its working position opposite the workpiece | at the first movement becomes a

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Tool brought in rapid traverse into a position in which with The machining of the workpiece started with the second Movement is a feed movement in which the tool moves in relation to the Workpiece with the desired pre-stroke speed. is moved away, which is usually e.g. in millimeters per revolution of the workpiece is expressed | on the third movement it is what is known as the rapid retraction through which the tool slide quickly returns to its retracted position is returned. You will usually be able to index the turret with the aid of a suitable indexing device brought about, namely during the express return or after its termination «

A known type of turret is usually caused during one complete revolution of the camshaft, to carry out several index movements, the number of which corresponds to the number of stations of the turret head | for example In a turret bank with six stations, the turret head performs six index movements each time Squat used twice must have several elevations, whereby Each station or position of the turret head is assigned such an elevation, and each of these elevations must be shaped in such a way that the rapid advance movement, the relatively slow advance movement and the can bring about the rapid return of the tool slide. In each pail, one complete revolution corresponds to the Camshaft and the associated cam a complete working cycle of the turret bank, in the course of which one workpiece is completed at a time * Since the camshaft moves together with the cam evenly and with a Rotates at a predetermined constant speed, the three movements of the tool slide described above constantly repeated, so that several workpieces of the same type are produced one after the other.

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The total time required for processing a specific workpiece in such known automatic turret banks to carry out a complete work cycle determines the production performance of the machine, with regard to the three basic movements of the tool slide mentioned, ie * the advance in rapid traverse, the relatively slow feed movement and the rapid return each of which during a complete operating cycle of a revolver Bank, for example, _e is repeated six times, the invention contemplates the Gäher the following factors treated ·

The rapid advance of the tool slide should be carried out as quickly as possible, and therefore the As steep as possible. In the case of the previously known ones that can be advanced with the help of a cam and through It is a spring-retractable tool slide of turret banks when the steepness of a cam projection is too great required to apply an extremely large torque to rotate the cam; this can the cam drive device become overloaded, and it it often happens that the cam and the associated follower element come to a standstill or jam. To such To avoid interference,}. Lies the preferred maximum Cam pitch angle in the previously known by a squat-forward and spring-retractable tool slide of turret benches in the range of 45 ° to 60 °.

Correspondingly, it should be used in turret banks in which the tool slide is pushed forward by a cam and is returned by a spring, the rapid return of the tool slide is also possible as quickly as possible perform; for this purpose one must again provide the cam with very steeply sloping control surfaces. Practically there are no restrictions on the steepness of these cam sections, because the energy for returning the The tool slide is supported by a suitable return spring

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upset. However, one factor plays a role here, as a result of which the start of the rapid return movement of the tool slide is considerably delayed . These are the dimensions of the cam roller, which must necessarily be large, as very large forces usually have to be transmitted through the cam roller when the tool carriage is to be advanced towards the workpiece * Because of the relatively large dimensions of the cam roller, which is used in an automatic turret is used in which the tool slide is advanced by a cam and retracted by a spring, it is obvious that the tool slide at the end of a cutting operation, that is, when it has reached its extreme advance position, will not immediately reach a full return speed can, since the relatively large cam roller requires a cam movement to be carried out, which is preferably not less than half the diameter of the cam roller, before the tool slide can reach its full return speed when returning

The above-described loss times, which in a known automatic turret bench with six stations, in which the tool slide is advanced by a cam and returned by a spring, while Each complete work cycle occurs six times, which in many cases leads to a total loss time that is longer than 40 to 5β # corresponds to that ^ eIt which an inventive automatic turret bench with six stations required to go through a complete work cycle and to finish a workpiece «Admittedly, a through a cam displaceable and retractable by a u'eder Tool slide a very precise control of the feed rate of the tools described above automatic revolving mechanism known * all occurring processing tasks, but arise e very large loss of time in performing the preliminary run

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ORIGINAL! NSPECTED

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the rapid return of the tool base.

In view of the disadvantages described above, it has already been proposed to use the tool slide to operate an automatic turret bank with the help of hydraulic cylinders such actuation of the tool slide in rapid advance and rapid return compared to a Yorschubnooken and a return spring offers considerable advantages »When using a single hydraulically operated tool slide, however, the relatively low feed rate of the tool in question compared to the workpiece, the. is measured in millimeters per workpiece rotation, duroh a throttling of the supply of the hydraulic pressure medium to the hydraulic actuating cylinders achieved «Biese Bros- · provision of the supply of the pressure medium to the hydraulic cylinders for setting and maintaining the desired pre-stroke speeds of the various on dta Eevolversohlitten arranged sons oath tools has proven to be quite, inexpedient, since it is necessary is to increase with different feed rate work, and since the viscosity of the hydraulic pressure medium changes depending on the temperature | as a result, such hydraulically controlled turret banks are required are often shut down "so that the necessary setting work can be carried out"

The Irfindung now looks at an automatic one Hevolverirehbank with a «headstock for picking up and Turn on a · work piece and «in a revolver base» The «is arranged in the turret head, d # for several tools can name which by index movements in their work status compared to the ongoing work We'd know, a source for a high-quality Druoknittel in front of »also a« »double-acting hydrmuUeofcen actuation-»

Κο1 * · η with 4 · «R6volver * ohlifl # n

is connected »so that it can be moved back and forth, in order to have the tools inserted in the turret attack successively on the workpiece, a device by means of which an index movement of the turret head in each case then brought about when the tool in question has carried out the intended operation, a camshaft with a device that causes the camshaft to complete a workpiece a complete Rotation, a cam or a cam piece connected to the camshaft in a rotationally fixed manner as well as through the Curve piece Hydraulic valve control device to be operated via a stylus, which enables the source for the hydraulic pressure medium to be connected to one or the other end of the hydraulic cylinder, so that the Revolver ball bearings can be moved back and forth, so that the tools built into the turret head one after the other carry out certain operations on the rotating workpiece! here the cam or the curve piece is shaped in such a way that that the hydraulic valve control device works together so that the hydraulic pressure medium can be routed to the actuating cylinder to move the fievolvereohlitten back and forth repeatedly, with the slide having a fast forward movement, a relatively slow tool advance movement and a fast one Backward movement relative to the workpiece executes, and the Werkseuge are rotated step by step by the turret head, to that they are in the course of each revolution of the Camshaft successively carry out several work steps on a work unit until the work unit is completed »

The invention and advantageous details of the invention are described below with reference to eohematisoker characters * * a few examples are explained in more detail *

Jig. 1 at the front of a automatic fl * volverd * «iibank.

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192503?

Fig. 2 shows the Hevolver lathe according to Pig · 1 im Layout.

FIG. 3 is an enlarged detail from FIG. 1.

FIG. 4 shows the arrangement of FIG. 3 viewed from the line 4-4 in FIG.

Fig. 5 is a horizontal J-line section along the Line 5-5 in Fig. 3.

Fig. 6 is an enlarged ^x eilschnitt along the line 6-6 in Fig x 4.

7 is an enlarged fragmentary view taken along FIG Line 7-7 in Fig. 3.

Fig. 8 shows a development of a typical control cam piece how it is used to operate the hydraulic control valve according to the invention «

Fig. 9 shows schematically a preferred embodiment of a hydraulic to be actuated by a cam piece Control valve, which here assumes its completely closed or neutral position, in which it is not of the hydraulic pressure medium flows through

FIG. 10 shows the control valve according to FIG. 9 in the position in which it is completely open so that the the volver head slide is advanced »

FIG. 11 shows the control valve according to FIG. 9 in the fully open position in which the turret head slide is withdrawn.

According to the drawings, in which corresponding or similar files have the same reference numerals are denoted »is the inventive, elm curve piece and an arrangement comprising a hydraulic control device

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in connection with a turret lathe which is more or less designed in a known Y / eise and is designated as a whole with 20 used whose turret head can be hydraulically detached? it should be noted, however, that the invention can also be used advantageously in other types of turret banks and in automatic screw machines leaves.

The automatic turret bench 20 described here as an example comprises a substructure 21, one arranged at the head end Support 22 and a support 23 arranged at the other end, both of which are attached to the substructure 21 are and protrude from it upwards, furthermore a spindle head 24 arranged on the support 22 for Picking up and rotating the workpiece as well as extending between the support 22 and the support 23 and IP watch bars built into these supports with their ends 25 ·

A turret slide is on the guide rods 25 26 stored along the guide rods in the direction of the spindle head 24 and is displaceable away from it · The carriage 26 carries one for performing index movements set up turret 271 of the multiple tools 28 in the turret head shown here with six index positions, the tools 28 can have a material stop 281, a first drill 282, a second drill 283 »a reamer 284, a tap 285 and a Countersink 286 include

According to the drawings, the turret 27 comprises six work stations spaced apart at an angular distance of 60 ° electrical or hydraulic devices are preferably provided »by means of which the turret head from the Position in which the material soleplate 281 faces the spindle iet, is gradually brought into the various working positions one after the other, while the turret bench

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20 runs through a complete work cycle to produce a workpiece to complete "

A rotatable chuck 240, which is used to grasp a workpiece W, is mounted in the spindle head 24, centering, clamping and turning j the workpiece is usually a material rod 38, which is advanced through da.s chuck 240 with the aid of a device (not shown) when the Material stop 281 inserted into turret 27 assumes an index position in which it faces the rotatable chuck axially after the previously completed one Workpiece from the bar 38, e.g. with the aid of a parting tool 290 arranged on a cross slide 29 has been cut off. The transverse sole mount 29 is preferably made better known by a device not shown Type operated before the turret 27 brings the material stop 281 into its working position, which immediately after the last index movement of the turret head and shortly before the end of a complete working cycle of the turret bank 20 happens

According to Pig. 2, a further cross slide 30 can be added serve, part of the peripheral surface of the workpiece V with Help to profile your own i'ormstahls 300. The second cross slide 30 is actuated with the aid of a known type, not shown, in order to carry out this work step to extend the evolverleank during a predetermined stage of a complete work cycle

In the support 22 arranged at the head end of the machine there is mounted a control shaft 31 which also extends through the support 23 at the other end and is driven by a worm gear 32 so that during each complete working cycle of the automatic turret assembly for the completion of a workpiece complete revolution. Bas rotatable clamping

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Chuck 240 of the spindle head 24 is preferably with predetermined Speeds with the help of V-belt 33 driven with a variable speed drive, not shown Speed working drive device are connected.

The part of the automatic turret bench 20 described below is designed according to the invention, and this rope can also be used with other automatic lifting machines or screw machines to achieve the to achieve the advantages made possible by the invention and the efficiency of the machine concerned or the production output to improve.

The turret slide guided in a sliding manner on the guide rods 25 26 is in the direction of the rotating workpiece W and away from this by a double-acting Power actuator 35 moved, which is attached to a top of the support 23, in the direction the Mascninenacnae extending extension plate 34 is arranged} the piston 36 of the actuating cylinder carries one at 370 on the adjacent end of the turret slide 26 attached piston rod 37. The cylinder 35 has an inlet and outlet port A and B at each end on. The openings or supply lines A and B are dependent from a hydraulic control valve 50 to be actuated by the cam piece to a not shown Source of hydraulic pressure medium connected to advance and retract the turret slide 26, so that the tools 28 inserted in the turret head 27 one after the other towards the workpiece Yf and from this can be moved away while the turret bench 20 is a complete work cycle to complete a work piece

The hydraulic control valve 50, which is to be actuated by the cam piece, is preferably arranged on a single control valve slide 40, which is on two relatively short ones

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is stored in the Längariciitung extending guide rods 41 slidably _t which are in turn supported by bearing blocks 42 which support 23 are attached to the underside of which extends in the longitudinal direction of extension plate 34 on which the actuating cylinder is arranged 35th The control valve slide 40 extends from the guide rods 41 in accordance with FIG. The hydraulic control valve 50 to be actuated by the cam piece is provided with a centrally arranged, downwardly protruding load or feeler pin 70 which passes through an opening in the control valve slide

40 protrudes downward so that it cooperates with a generally cylindrical cam piece 47 to be described can, which is arranged on a drum 45 which is rotatably connected to the control shaft 31 and adjustable in the longitudinal direction is.

According to FIGS. 4 to 6, the control valve slide 40 with the turret slide 26 is through one in the middle between the two guide rods which are separated by a lateral distance and extend in the longitudinal direction

41 for the control valve slide arranged rod 43 connected. The connecting rod 43 is at one end in the Turret slide 26 screwed or on others ii / iron attached to it while near its outer end clamped to the control valve slide 40, for example by a device 44 or the like operating with a wedge effect can be operated by hand with the aid of a clamping lever 440. When the clamp 44 is in its clamped position to hold the connecting rod 43 firmly in place, the control valve slide 40 moved together with the turret slide 26

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That in .big. 9 to 11 shown by daa curve piece 47 to be operated hydraulic control valve 50 is preferably a piston slide valve with a housing 51, a cover part 52 and a base part 53 formed »The housing 51 has a through hole 54, in which a piston slide 60 is slidably mounted. The housing 51 is with several internal, by longitudinal distances separate annular flow channels 55 »56, 57, 58 and 59, each of which on an annular surface in the longitudinal bore 54 of the housing opens. The piston slide 60 preferably has three formed on its peripheral surface .Ring grooves 61, .62 and 63, which by annular Web 64, 65, 66 and 67 are delimited · The cover part 52 has a bore 520 opening on the inside for receiving and centering a compression spring 68 through which the piston valve 60 constantly against the head end of an MhI pin 70 is biased, which is supported by the base part 53 of the control valve 50 and downward protrudes from the housing.

The feeler pin 70 preferably comprises a cylindrical shaft 71 with a conically tapered lower one End 72, in which a hardened pin 73 is installed · The PÜhlstlft is shaped at its upper end so that it Head 74 has a larger diameter, the peripheral surface of which forms part of a spherical surface which is is supported on a matching bearing part 75, which in turn is supported by a shoulder 530 in the lower section of the base part 53 of the valve housing is supported. That The bearing part 75 and the base part 53 have bores 750 and 531, respectively, so that the shaft 71 of the feeler pin 70 is unimpeded can protrude from the valve, the head 74 of the feeler pin executing movements in all directions in the bearing part 75 can »if a pressure on the Shaft 71 or the pin 73 is exercised · The feeler pin

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10 is constantly biased in the direction of its vertical central position in that the compression spring 68 applies a force via the piston slide 60 to the flat upper end face 740 of the head 74 of the feeler or actuation pin

The connection A of the double-acting actuating cylinder 55 is connected to a connection CVA of the control valve, while the connection B of the cylinder 35 is connected to a connection OVB of the control valve. The connection GVS of the control valve is connected to a known type of source (not shown) for a pressure medium, which can comprise an electrically driven pump and a known type of pressure vessel. The two connections CVR of the control valve are connected by a return line R to the container of the pressure medium source.

When setting up a machine for the production of a particular workpiece, it is often desirable to use the Advance or retract the turret slide 26; to make this possible, a manual actuation device is shown in FIGS. 9 to 11 90 provided, which comprises a manually operated control hook 91) is the control hook arranged on a transverse camshaft 92 which is mounted in the control valve sole element 40 and with the help a hand lever 93 can be operated «If the manual operating lever 93 is pivoted near the left as shown in FIG the hand control hook 91 the ig Fig. 10 with dash-dotted lines Lines indicated position in which the compression spring 68 of the hydraulic control valve 50 the piston slide 60 holds in its lowest position, in which the Actuating pin 70 assumes its central position, the hydraulic pressure medium to the double-acting cylinder 35 Is supplied via connection A in order to advance the piston 36 and thus also the turret slide 26 " If, on the other hand, the manual control lever 93 according to FIG. 3 is brought into

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the position indicated on the right-hand side, the manual control cam 91 takes the position shown in Fig. 11 with dash-dotted lines A position indicated by lines, in which the actuating pin 70 has its greatest inclination, the piston slide 60 is held in its upper position, so that the hydraulic pressure medium to the double-acting cylinder 35 is fed through port B to the turret slide 26 to withdraw

In order to initiate the automatic operation of the turret bench 20, the manual control lever 93 according to FIG pivoted to the left so that the manual control cam 91 comes completely out of contact with the actuating pin 70, and that this cam maintains its rest position during the automatic operation of the machine, so that the actuating pin 70 of the hydraulic control valve 50 its in 10 assumes the central position shown at AF, in which the piston slide 60 is in its lowest position due to the return spring 68 Position is held with the connections CVA and CVB are fully open, causing the turret slide 26 moves at its maximum speed in the forward direction until the actuation pin 70 comes into contact with the cylindrical cam piece 47. Every further movement of the turret head slide 26 causes that the actuating pin 70 is in that shown in FIG Way is pivoted in sighting to the position ZF for the flow rate zero) here the piston slide 60 pushed upwards so that the connections CVA and CVB of the control valve are closed to start the forward movement of the turret slide 26 to interrupt. As soon as this point is reached, the turret bench 20 becomes fully automatic controlled in accordance with the profile shape of the cam piece 47 which actuates the hydraulic control valve 50.

In the automatic operation of the turret bench 20 according to the invention, in which the curve piece 47 bearing is calibrated

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Drum 45 rotates in the direction indicated by an arrow, the position, the direction of movement and the Movement speed of the turret slide 26 is determined by the double-acting - "actuating cylinder 35, the entirely dependent on the profile shape of the cylindrical curve piece 47 mediated by the control valve is controlled.

As long as the - "actuation pin 70 on a radially extending When the surface FS rests while the cam 47 rotates, the ± actuating pin remains in the position shown in FIG. 9 with ZF designated closed position, so that the turret does not move. However, if the cam rotates, and when a positively inclined surface or "ridge" CR abuts pin 70, the pin moves in the direction of the position shown in FIG. 11 at RF for the rapid return, and the piston slide 60 11 moved upwards, so that the hydraulic Pressure medium is supplied to port B of the double-acting hydraulic cylinder 35 and port A of the cylinder is connected to the sump, whereupon the turret slide 26 with a by the angle of inclination of Curve surface CR and the rotational speed of the curved piece certain speed is withdrawn. if the curve piece 47 rotates further and a negatively inclined surface or a "depression" CD reaches the pin 70, The compression spring 68 of the control valve 50 moves the piston slide 60 according to FIG. 10 together with the pin 70 downwards, so that the actuating pin assumes the position shown at AF, in which the hydraulic pressure medium the connection A of the cylinder 35 is supplied, while the cylinder connection B is connected to the sump, so that the turret slide 26 with a by the inclination angle of the surface OD and the rotational speed of the Cornering is advanced at a certain speed

009808/0280

According to Fig. 3 »5, 7 and 8 is on the control shaft 51» the during ^ each complete work cycle of the automatic iievolverbank 20 for the production of a finished workpiece executes a full revolution, a! drum 45 is arranged, which on the according to Pig, 3 to the right from the support 23 protruding end of the control shaft axially displaceable and connected to it in a rotationally fixed manner by a wedge 46 is. That indicated in Fig. 7 with dot-dash lines and reproduced in other figures with solid lines cylindrical cam 47 is attached to drum 45 by means of, for example, screws 450. Fig. 8 shows in a Developed a typical cylindrical curve piece 47, the on the drum 4b can be placed around with the tip 73 of the actuating pin 70 of the control device 50 according to the invention to work together, so that the gradual rotatable. turret head 27 carrying fie turret head slide 26 is caused during each complete working cycle of the turret bench 20 to produce a finished workpieces one after the other to bring several tools 28 into their working position relative to the workpiece w.

The outer end 451 of the drum 45 receiving the cam piece carries a micrometer device 80 for passage the axial fine adjustment of the drum 45 and the cam 47. The outer end portion 451 of the drum preferably has a considerably smaller diameter to ensure that it does not make contact with the tip 73 of the pin 70 comes when it cooperates with the cam piece. The right end of the control shaft 31 is 7 provided with an axial threaded hole 310 for attaching the micrometer device 80

The micrometer device 80 comprises an adjustment shaft 81 which is supported in a bearing 82 which is the bearing 82 attached to the outer end 451 of the drum 45 and at its inner end with a threaded hole 310 of the control

009608/0260

shaft screwed in external thread 810 · The external thread 810 of the setting shaft 8t and daa matching it Internal threads 310 of the control shaft 31 preferably have a relatively small pitch to help with fine adjustment the micrometer device 80 to enable

The bearing 82 is on the annular face of the outer end 451 of the drum 45 by means of, for example, machine screws 83 attached · You setting shaft 81 has a Hingsohulter 821, which is located on the adjacent inner The end face 820 of the bearing 82 is supported. A rotary knob 84 with an axially inwardly projecting annular shaft 840 is pushed onto the outer end 812 of the adjusting shaft 81, which has a smaller diameter, and through it a wedge 813 connected in a rotationally fixed manner. The inner annular end face 841 of the shaft 840 of the rotary knob 84 is trimmed rotatably on the axially outwardly directed end face 821a of the bearing 82 · A bushing 85 is ζ · Β · through a Clamping tube 850 firmly connected to the shaft 840 of the rotary knob 84 and provided with graduation marks 851 on its circumference, with which a pointer 822 mounted on the bearing 82 cooperates to determine the precise position of the turret slide to indicate opposite the free end of the workpiece W when the drum 45 is adjusted in the longitudinal direction · A circular cover plate 86 overlapping the outer end of the rotary knob 84 is connected to the adjustment shaft 81 by a countersunk head screw 87 to keep the micrometer device 80 in position to keep·

If you have the automatic turret bench according to the invention 20 with their control by a curve piece and a hydraulic control valve taking into account their higher! Cam is advanced and returned by a spring, it can be seen that the automatic revolver according to the invention

009101/021 »

bank offers numerous advantages.

The first thing to mention is the fact that in the known automatic turret banks, in which the turret slide is advanced by a cam and by each one is returned, the speed the rapid advance movements of the turret slide is limited to a significant extent by the fact that it it is practically impossible to use an incline angle of more than 45 to 60 ° to be provided. In the turret slide according to the invention 26, on the other hand, which is controlled by a curve piece and a hydraulic valve, it is not only possible but even useful to control the rapid advance of the hydraulically operated turret head slide rite inclination in the range of 85 to ö9 °, see above that in comparison to the previously known revolver banks a considerable increase in production output is achieved · In the case of the revolver bench according to the invention with aer described Control device i3t it is now possible to set the desired Select speeds for the rapid advance and rapid return of the turret slide and a hydraulic one Provide a pump whose delivery rate is sufficient to achieve the selected speed of the turret slide to achieve. Furthermore, the revolver bank after the Invention all of the forces required to move the carriage 26 generated by the hydraulic cylinder 35 while in the control device between the cam piece and the actuating pin 70 for the hydraulic control valve 50 only a force of at most about 0.9 kg needs to be applied.

If the revolver attachment 20 according to the invention is to be converted from the production of a certain workpiece to the production of another workpiece, it is necessary to use a different cam piece 47 and to set the turret slide to a different position must also the hydraulic control valve 30, which by

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192503?

the cam is controlled in a different position be brought across from the carriage 26. »

To make this possible, the hand control device 90 used to mount the turret slide 96 on hydraulic to bring paths into its new position with respect to the workpiece W. First, the new curve piece 47 is on the Carrier 45 put on, and the hand-operated clamping device 44 of the control valve 40, which is normally a Fixed connection with the connecting rod 43 attached to the carriage 26 is loosened so that the control valve slide 40 can move independently of the turret slide 26 along its guide rod 45 » Then the control valve slide 40 is adjusted with the nand until the detection pin 70 of the hydraulic control valve 50 assumes the correct position in relation to the new curve piece 47. The clamping device 44 is then again actuated to secure the control valve slide 40 with the turret slide again with the aid of the connecting rod 43 26 to be connected o In this way, the actuating pin 70 of the control valve is brought at least approximately into the correct position with respect to the new curve piece 47. A test workpiece is now manufactured and tested. If a fine adjustment of the slide 26 is made in relation to the Workpiece W is required, you can for this purpose the cam piece 47 along the control shaft 31 with the help of the rotary knob 4 of the micrometer device 80, the bearing 45 together with the curved piece 47 along the bteuerwelle 31 is moved until exactly the desired position is reached.

Another advantageous feature of the invention, with the help of a cam piece and a hydraulic one Valve-controlled turret bank consists in that the advance or retraction of the turret slide needed force on the sled in such a way

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is applied that the on the guide rods 25 for the Carriage 26 acting bearing forces can be reduced considerably, so that the carriage 26 its original accuracy lasts longer than the revolver head slides of Revolver benches of a well-known type, in which the slide is pushed forward by a cam and returned by an eder is, according to the invention, this advantage is achieved by that the double-acting hydraulic cylinder 35 for advancing and retracting the carriage 26 is arranged is that the piston 36 and the piston rod 37 with the turret base 26 connected on the center line of the spindle head 24 and thus also on the axis of the work piece Therefore, the thrust to advance the carriage 26 against the piece is applied along the line along which act on the workpiece W the greatest cutting forces that usually occur when in the Large diameter turret drill bits are used

Patent claims!

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Claims (10)

PATBNI CLAIMS 1.) Automatic turret lathe with a spindle head for picking up and turning a workpiece and a turret carriage with a turret head that carries several tools that can perform index movements so that all tools can be brought into a working position one after the other in relation to the rotating workpiece, characterized by a source (S) for a hydraulic pressure medium, a double-acting hydraulic actuator cylinder (35), the piston (36) of which is connected to the turret base (26) so that this slide can be moved back and forth in order to move all of them into the turret ( 27) to bring the tools (28) used after an index movement into their working position relative to the workpiece (W), a device which causes the turret to perform an index movement after each one of the tools has completed an operation on the workpiece, a control shaft (31) with a device (32), by means of which the Steue rwelle is rotated so that they each makes one complete revolution while a workpiece is completed "a to the control shaft rotatably connected curved piece (47), a rich by this cam piece and an actuating pin (70) to be actuated tax advantage tung (50) in the form a hydraulic valve which connects the source for the hydraulic pressure medium with the ends (A ₉ B) of the hydraulic cylinder to operate the turret slide so that the tools inserted in the turret are brought into their working position in relation to the rotating workpiece one after the other, wherein the cam is shaped so that it cooperates with the actuating pin of the hydraulic control valve (50), 009808/0210 in order to supply the hydraulic pressure medium to the actuating cylinder and to operate the turret slide so that ^ this repeats a rapid advance movement, a relatively slow one. «tool advance movement and a rapid retraction movement executes against the workpiece to cause the hevolver head to be incrementally adjusted tools during each revolution of the control shaft successively carry out several work steps on the i / part, see above that a finished workpiece is produced 2. Automatic lifting lathe according to claim 1, characterized in that the hydraulic control valve (50) to be actuated by the cam piece (47) is a piston slide valve, since it comprises a housing (51) with a through bore (54) for receiving a piston slide , furthermore a cover part (52) and a base part (53) as support for an annular bearing part (75) with a bearing surface forming part of a spherical surface, an actuating pin (70) protruding axially through the base part and the bearing part, wherein between the actuating pin and the bearing part has an annular clearance, and wherein the actuating pin comprises a head portion (74) of larger diameter with a flat end face and a bearing surface forming one part of a spherical surface, this bearing surface cooperating with the bearing part in the housing, one in the bore of the housing displaceably mounted piston slide (60), one in the valve housing arranged compression spring (68), by which the piston slide is constantly pretensioned against the flat end face of the head section of the actuating pin j ^ to center the actuating pin relative to the axis of the valve, annular flow channels (61, 62, 63) formed in the piston slide f ring-shaped in which ffehäusebohrung formed flow channels (55, 56 "57 $ 58, 59) as well as connections (CVA, CVB, CVH, CVS), d | e permit the flow channels of the piston slide optionally with a 009808/0210 BATH ORIGINAL To connect pressure medium source (S) or a return line (R) leading to this and the ends (A, B) of the double-acting Actuating cylinder depending on the 'brought about by the cam piece angular position of the To connect the actuating pin to the pressure medium source 3. Automatic turret lathe according to claim 1, characterized characterized in that the angle of inclination of the cam piece (47) for controlling the hydraulically effected oil advance movement and the rapid return movement of the turret base (26) can be between 85 ° and 89 °. 4. Automatic turret lathe according to claim 2, characterized characterized in that a manual operating device (90) is provided which enables the operating pin (70) to be moved independently of the cam piece (47), so that the turret slide (26) when setting the Turret bench (20) during the transition from one machining task to another machining task on hydraulic Ways can be moved 5. Automatic turret lathe according to claim 1, characterized characterized in that a drum (45) connected to it in a rotationally fixed manner is arranged on the control shaft (31), that the cam piece (47) is arranged on the drum, and that a device (80) is provided for fine adjustment the drum with the curved piece in the longitudinal direction opposite the Öteuerwelle made possible 6. Automatic turret lathe according to claim 1 _f, characterized in that a slide (40) carrying the hydraulic control valve (50) is arranged on 3 guide rods (41) which are fixedly arranged parallel to the guide rods (25) for the turret slide (26) the hydraulic control valve is arranged on this slide in such a way that the actuating pin (70) is located directly above the control shaft (31) on the turret slide 009808/0260 _ _u _ 192503? one extending parallel to the guide rods Connecting rod (43) is attached, and that a device (44) is provided by means of which the carriage for the hydraulic control valve can be releasably braced with the connecting rod, so that the control valve slide with each selected longitudinal setting of the same relative to the turret slide together with the latter emotional· 7. Automatic turret lathe according to claim 1, characterized characterized in that a manual control device (90) is provided, by means of which the hydraulic control valve (50) can be operated independently of the cam piece (47), so that the turret slide (26) under Use of the manual control device during the adjustment of the Kevol bench (20) or during the transition to production another workpiece moved hydraulically can be. 8p automatic turret lathe according to claim 1, characterized in characterized in that a device (80) is provided, by means of which the cam piece (47) opposite the Control shaft (31) can be precisely adjusted in the longitudinal direction to avoid any slight inaccuracy in relation to the relative position of the turret slide 26 and the workpiece (W) when setting the turret bench (20) or when switching to the production of another work piece to be eliminated without the need for the repeat the usual work steps for adjusting or moving the turret bench, 9. Automatic turret lathe according to claim 1, characterized characterized in that a hand control device (90) is provided, by means of which the actuating pin (70) can be actuated independently of the cam piece (47) to move the turret slide (26) during setting to move the turret bench (20) or when changing over to the production of another workpiece » 009808 / 02S0 10. Automatic turret lathe according to claim 1, characterized in that a slide (40) carrying the hydraulic control valve (50) is fixed to the Guide rods (25) for the turret slide (26) parallel guide rods (41) is arranged, wherein the hydraulic control valve is arranged on this slide is that the actuating pin (70) is arranged directly above the control shaft (31) that a connecting rod (4?) is provided, which is attached to the lifting head carriage and from this point parallel to the guide rods of the turret slide, and that a device (44) is provided, by means of which the control valve base releasable with which the connecting rod extending from the turret slide can be braced, so that the control valve slide is common with respect to the turret base with each selected longitudinal setting is moved with the latter The patent attorney