US1073252A - Non-circular-hole-shaping machine. - Google Patents

Description

E. LAUTERJUNG.

NON-CIRCULAR HOLE SHAPING MACHINE.

APPLICATION FILED NOV. 30. 1912.

1,073,252. Patented Sept. 16, 1913.

3 SHEETS-SHEET 1.

PI FIGZ.

E. LAUTERJUNG.

NON-CIRCULAR HOLE SHAPING MACHINE.

APPLIOATION FILED NOV. 30. 1912.

1,073,252, Patented Spfi. 16,1913.

3 SHEETS-SHBET 2.

E. LAUTERJUNG.

NON-CIRCULAR HOLE SHAPING MACHINE.

APPLICATION FILED NOV. 30. 1912.

1,073,252, Patented Sept. 16,1913.

3 SHEETS-SHEET 3.

FIG. 5.

FIG. 6.

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specifieation t1" Letters retest.

Patented se t. is, was.

Application filed 'Novembe'r so, 912. Serial so. teaser.

To all whom it may concern Be it known that I, EUonN LAUTERJUNG, a citizen of the Er'npire of Germany, residing at 174 Schiitzenstrasse, Solingen, in the Empire of Germany, have invented a new and useful Non Circular-Hole-Shaping Machine, of which the following is a specification.

My invention relates to a novel nohcircular hole shaping machine, by means of which it is rendered possible not only to produce the noncircular holes more rapidly, but also to make them smaller than h1therto. The tool vertically guided in the machine is made to out for the upper part and to guide for the lower part the work-piece. From known machines of this kind the new machine differs in that the work-piece is intermittently turned and is at the same time yieldingly pressed against the vertically reciprocating tool, until the Work is finished The tool comprises two superposed portions, of which the thicker one during the return stroke does not leave the pattern at all, but leaves the work-piece alone so as to permit it to be fed round;

I will now proceed to describe my invention with reference to the accompanying drawings, in which-' Figure 1 is an elevation of. the novel noncircular hole shaping machine, the casing being shown in section and parts being broken away, Fig. 2 is a side view of the same, the casing and parts being shown in section, Fig. 3 is an upper view of the same, parts being broken away, ig= 4 shows an upper part of Fig. 2 in section, the support Fig, .5 is a Vertical section on an enlarged scale through the uppermost part of the machine in Fig. 2 and shows the tool and parts of the machine frame, the workpiece and the pattern, Fig. 61s a horizontal section through the line C.-D in Fig, 5 and shows parts of the pattern and the work-piece, Flg, is a similar section and shows parts of a modified pattern and the work-piece, and Fig, Sis a horizontal section on an enlarged scale through the lineA.-B in Fig.1, the casing being omitted.

Similar characters of reference refer to similar parts throughout the several, views.

1 denotes a pillar, the upper end of which is at31 (Figs-.2 and 4) plvotally connected with a table 12, which normally occupies a horizontal position shown at Fig. 2, but can turn on the horizontal pin 31 andcan be inslide 3 is shown as and in the pillar clined by means of a screw-spindle 33 into a position shown at ig. 4. The screwspindle 33 is at the upper end pivotally connected with the table 12 at 36 and engages in a nut 39 turnable in a crosshead 32. The crosshead 32 is made to rock with its two horizontal trunnions 37 in suitable brackets 38, 38 fastened on the pillar 1. The nut 39 is rigidly connected with a hand-wheel 40, by means of which it can be turned for raising and lowering the table 12. A slide 14 is longitudinally guided in the table 12 in any known manner (see Fig. 1) and is connected with a weight 34 (Fig. 2) by means of a rope 41 passing over two guiding pulleys 42, 43, In this manner the slide 14 is constantly pressed to the left in Fig. 2.

The slide 14 has a large central opening 44 (Fig. 4), in which the long thin nave 45 of a worm wheel 15 is mounted to turn, while it is prevented from longitudinal motion by means of an annular nut 16 engaging its lower end. Theworm wheel 15 is rigidly connected with a circular support 17 and it will be seen, that by means of the worm wheel 15 the support 17 can be turned. 4 The support 17 is to support any work-piece 18 and pattern 19 laid on which are secured by means of rectangular plates 20, 20 (Fig. 3) and known adjusting screws shown. The support 17 has a central opening 46 for a purpose to be explained later on,

The pillar 1 is shown as made in one with two arallel guides 2, 2 (Fig. 8), between which a slide 3 is vertically guided, The

made in one with a dovetailed guide 7 for vertically guiding a smaller slide 8, The large slide 3 has a hole for a bolt 47, which passes through a vertical slot 48 in the small, slide 8, and it will be seen, that the two slides 3 and 8 can be displaced relatively to one another and vertically adjusted by means of the bolt 47 The small slide 8 carries a horizontal pin 49. The pillar l rigidly connected with a bracket 50 (Fig. 2), in the end of which 1 ahorizontal shaft 11 is mounted to turni. This shaft 11 has fastenetl on ita cone 51, a bevel wheel 52 and a gear wheel 53, Ahorizontal shaft 54 is mounted to turn in the pillar 1 and carries at the rear end a large gear wheel 35 meshing with the said gear wheel 53 and at the front end a slotted crank 10 of any known construction. .Inthis crank 10 a pin 55 is longitudinally adjustable in a known manner and this pin 55 is pivotally connected with the already above mentioned pin 49 by means of a rod 9. It will now be evident, that from the cone 51 driven from without in any known manner the large slide 3 is reciprocated, and its stroke can be adjusted by means of the adjustable pin 55.

From the guides 2, 2 the slide 3 projects upward and is .provided with a lug 4 (Figs. 2 and 4) at right angles to it. On this lug 4 is fastened a vertical cylindrical support or chuck 5 (Fig. 5) the upper end of which is bored and can receive a vertical tool 6 that is to be secured in it by means of a screw 56. From Fig. 4 it will be seen,-that the chuck 5 passes through the nut 16, the large nave 45 of the worm wheel 15 and the opening 46 of the support 17 upward and that the tool 6 is together with the large slide 3 vertically reciprocated.

I On the rear side of the pillar 1 is fastened a bent bracket 57 (Fig. 2), in which a vertical shaft 23 is mounted to turn. This shaft has fastened on it below. a large bevel wheel 58 meshing with the said bevel wheel 52 and above a dlsk 24 provided with recess 59, in which a lever 25 can be adjusted at any angle to the upper surface of the disk 24. Above the bracket 57 another bracket 60 is fastened on the pillar 1 and a short vertical rod 26 is longitudinally guided in the bracket 60, rod 26 being arranged eccentrically to rod 23 and in the path of tappet 25. A helical spring 29 surrounding the rod 26 and inserted between the bracket 60 and a collar 61 on the rod tends to press the latter from above against the surface of the disk 24. The rotation of rod 23, will thus cause the spring-pressed rod 26 to ride along the incline of tappet 25, during each rotation of disk 24, so that in this way a complete rotation of rod 23, will cause an axially reciprocative movement of rod 26. The rod 26 is connected with another rod 26 above by means of two universal joints 62, 63 and an extensible or telescopic rod 27 between them. The upper rod 26 is guided in a suitable projection 64 on the left end face of the slide 14 in Fig. 2 and is provided with a horizontal pin 65, on which a springpressed pawl 28 is mounted to rock. In three suitable bearings 66, 67, 68 on the slide 14 a shaft 21 parallel to the upper surface of the slide is mounted to turn, which has fast on it a worm 21 meshing with the worm wheel 15 and a ratchet wheel 22. The said pawl 28 is by its spring (not shown) pressed against the periphery of the ratchet wheel 22. From an examination of Fig. 2 it will be evident, that on every revolution of the shaft 23 the lower rod 26 will be once raised by the ascending upper surface of the tappet 25, whereupon it drops under the action of the helical spring 29 on leaving the tappet 25; Thereby of course also the upper rod 26 Wlll be reciprocated, so that the pawl 28 will feed the ratchet wheel 22 one or several teeth forward. By varying the inclination of the tappet 25 the feed of the ratchet wheel 22 can be varied. It is further evident, that owing to the two universal joints 62, 63 and the telescopic rod 27 the feed of the ratchet wheel 22 is not inter fered with by any longitudinal motion of the slide 14 nor by any inclination of the table 12 (Fig. 4).

On the upper end of the pillar 1 are fastened two vertical arms 69, 70 (Fig. 1), the upper ends of which can be connected together by means of a how 30, in which the upperpartof the tool 6 is guided. The two pendent arms of the bow 30 have each a vertical slot 71 through which and through a hole in the arm 69 or 70 an adjusting screw 72 passes. It will be seen, that thereby the how 30 can be vertically adjusted to suit the tool 6.

The pattern 19 has a noncircular hole 6 with which the noncircular hole 6 to be produced in the work-piece, 18 is to register. In Fig. 6 the noncircular hole 6 in the pattern 19 is shown as hexagonal, while in Fig. 7 the noncircular hole 6 is shown as a straight slot with semicircular ends. Into the work-piece 18 invariably a circular hole 6 is first bored, which is inscribed in the noncircular hole 6 to be produced, so

that the tool 6 can be passed through it, or the work-piece 18 may together .with the pattern 19 be put over the tool for securing them on the support 17.

In Fig. 5 the tool 6 is shown as cylindrical for the lower and upper ends, while the intermediate portion is for the upper part 6 (see Figs. 6 and 7) so cut out as to form two adjoining faces, in other words to form a wedge-shaped knife as shown, a portion of the original cylindrical surface opposite to the vertical edge being left intact. The lower part 6 of the said intermediate portion is similar to the upper part 6 and differs therefrom only in that the edge is blunted, so that the shar edge of the upper part 6 a little projects rom the blunted edge of the lower part 6 as is clearly shown in Fig. 5. An inclined neck 6 is. formed between the two parts 6 and 6*, so as to form a cutting point 6 which is capable of cutting a chip off from the work-plece 18 during the downward active stroke. The blunted edge of the lower part 6 serves as a stop to the work-piece l8 and as a guide for the slide 14. The described transmission from the shaft 11 by means of the two bevel wheels 52, 58 to the ratchet wheel 22 is'so arranged, that the ratchet wheel 22 is only fed forward, after the cutting point 6 during the upward return stroke has left the work-piece 18 but still remains in the noncircular hole 6 of the pattern 19. Then under the action of the weight 34 the slide 14 with the worm wheel 15 and the support 17 will a little shift to the left in Fig. 2 014 until the inside of the hole 6 in the work-piece strikes and bears against the blunted edge of the lower art 6 In this manner the proper feeding oi the circular support 17 with the work-piece -18 and the pattern 19 on it -is insured and the cutting point 6 is enabled to successively cut off chips from the work-piece 18 along the periphery of the noncircular hole 6 in the pattern 19 until the support 17 has accomplished one revolution, when the noncircular hole 6 in the work-piece will be finished and the latter can be replaced by a fresh work-piece.

In case the maximum difl'erence between the bored hole in the work-piece 18 from the outline of the noncircular hole in the pattern 19 is greater than the thickness of a chip, of course the support 17 with the work-piece and the pattern will require to make more than one single revolution until the work is finished.

As the tool 6 is required to have a tensile strength only for the work, obviously it can be made comparatively thin in diameter so that the noncircular holes produced in the work-pieces can be made considerably smaller than hitherto.

Evidently the active portion 6 6" of the tool may have any other cross section if so preferred.

The machine is shown as for the most part inclosed by a casing 73 closed at the top by a. plate 7 1 and provided in the walls with two opposite covers 7 5 and 76 for giving access to the connecting rod 9 and the disk 24 with the lever 25 respectively. However, the casing is immaterial to my invention.

The noncircular hole shaping machine operates as follows: After taking off the bow 30 the work-piece 18 having bored in it a circular hole 6 and the pattern 19 are so superposed, that the hole of the former is inscribed in the noncircular hole 6 of the latter, after which both the work-piece and the pattern 19 are secured to the support 17 by means of the plates 20, 20 and their adjusting screws. Then a tool 6 is selected and is secured in the chuck 5 by means of the screw 56 and the bow 30 is replaced, after which the pin is so adjusted in the slotted crank 10 as to obtain a stroke of the tool 6- suitable for the thickness of the work-piece 18 so that for the highest position of the tool 6 its cutting point 6 still remains in the noncircular hole 6 of the pattern 19 and is above the work-piece 18, as is shown in Fig. Thereupon the how 30 is adjusted on the two arms 69, for properly guiding the upper end of the tool 6 and the lever 25 on the disk 24: is adjusted in its inclination for obtaining the correct length of the feed of the cutting point 6? along the periphery of the noncircular hole 6. Then the machine is started and the tool 6 will work in the manner described above. When it is desired to shape noncircular holes in the Work-piece having inclined walls, the table 12 will require to be inclined by means of the screwspindle 33, so that the tool 6 is parallel to the inclined wall of the noncircular hole 6 in the pattern 19, as is clearly shown at Fig. 4. Then the machine can bestarted for shaping the inclined Walls in the hole 6 of the work-piece. In this manner also conical noncircular holes can be. produced in-the work-piece. When lengthy holes with straight portions, such as the slot 6 in Fig. 7, are to be produced, of course the support 17 will require to be intermittently turned for the inclined or curved portions of the hole 6* and to be stopped for the straight portions of this hole, so that in the latter case the pawl 28 is turned off out of engagement with the ratchet wheel 22 and the slide 14 together with the support 17, the workpiece 18 and the pattern 19 is simply longitudinally moved by the weight 34 along the table 12, until the respective strai ht portion of the hole 6 ceases and the to lowing inclined or curved portion of the hole commences when the awl 28 is again turned into engagement wlth the ratchet wheel 22.

The noncircular hole shaping machine can be varied in many respects without departing from the spirit of my invention as set forth in the appended clalms.

I claim:

1. In a machine of the class described, a tool adapted to be vertically guided and having for a part a longitudinal cutting edge and for another part a guiding face parallel to the cutting edge, a support adapted to hold a work-piece and a superposed pattern and having a central opening for leaving space to said tool, means for intermittently turning said support, and means for yieldingly pressing said support in one direction so as to press the walls of a hole preliminarily made in the work-piece against the guiding edge of said tool.

2. In a machine. of the class tool adapted to be vertically guided and having it a part a longitudinal cutting edge and for another part a guiding face parallel to the cutting edge, a support adapted to hold a work piece and a superposed pattern and having a central opening, said tool being adapted to pass through the central opening of said support and through a noncircular hole in the pattern and through a hole bored in the work-piece, means "for intermittently turning said support around said tool, means for so adjusting the stroke of said tool that its cutting point remains for one extreme position in described, a

thehoie of the pattern without the workpiece and for the other extreme position projects from the Work-piece, and means for yieldingly pressing the Walls of the hole in the work-piece against the guiding face of said tool. x

3. In a machine of the class described, a frame, a table turnable on said frame around a horizontal axis and having a central opening, means for inclining said table, a slide longitudinally guided in said table and having a central opening, means for yieldingly pressing said slide in one longitudinal direction, a support turnable around an axis at right angles to said slide and having a central opening, said support being adapted to hold a work-piece and a superposed pattern, a second slide vertically movable in said frame, a chuck on said second slide, a vertical tool adapted to be secured in said chuck and to pass upward through the form for a part a longitudinal cutting edge.

and for another'part a guiding face parallel to the cutting edge, saidtool being adapted to pass through a noncircular hole in the pattern and through a hole bored in the'workpiece, and means for so adjusting the stroke of said second slide that for one extreme position the cuttin point of said tool remains in the hole of the pattern Without the Work-piece and for the other extreme position projects from the Work-piece.

EUGEN LAUTERJUNG. [L. s.] \Vitnesses: HELEN NUFER, ALBERT NUFER.

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