US2820329A - Honing tool sizing device - Google Patents

Description

Jan, 21, 1958 G, M, CALVERT 2,820,329

HONING TOOL SIZING DEVICE Filed Dec. 17, 1956 2 Shets-Sheet 1 "l INVENTOR,

HONING TOOL SIZING DEVICE Glen M. Calvert, Detroit, Mich.

Application December 17, 1956, Serial No. 628,830

18 Claims. (Cl. 51 34) nitffhisinvention relates to honing apparatus for honing the bores of workpieces wherein honing devices are oper- -fatedby a-reciprocable shaft or spindle and annular plug gage means encircles or embraces the shaft or spindle and -facts'during operation on the same end of the workpiece bore as the honing devices enter. In accordance with the 'operation' of such apparatus the gage means is axially movable relative to the shaft or spindle and is adapted to have predetermined operative entry or passage into the workpiece bore when the bore has been honed to a predetermined diameter, such entry or passage of the gage means `into the bore resulting in the actuation by the gage 'means of a limit switch or control device which in turn I initiates cessation or termination of the honing operation, .fthe latter being accomplished by releasing the honing devices from honing engagement with the workpiece bore.

An important object of the present invention is to provide gage'means having successive portions of varying diameter any one of which may be pre-selected to permit honing of the workpiece bore to the diameter thereof .whereupon a limit switch or control device will be actuated to initiateV cessation or termination of the honing operation.

A further'object of the invention is toprovide sizing or 'gage means for controlling the diameter to which the Vworkpiece bore is to be honed, said means preferably `comprising an elongated tubular gage ring or sleeve mernber provided with two pairs of equally and annularly spaced elongated gage elements or portions projecting r-adiallyoutwardly from the body of the gage sleeve mem` vber or ring. In accordance with the illustrated embodiment the outer arcuate gaging surface of each gage elementvis longitudinally tapered in the direction of the .workpiece bore to be engaged by the gage elements upon predetermined entry into the bore. These longitudinally tapered gaging surfaces progressively increase in effective diameter from their leading or bore entry ends whereby ,aty any preselected point in the length of the gage ring or lsleeve the effective diameter across the gaging surfaces of each pair of opposed gage elements will correspond to a pre-selected diameter of the honed workpiece bore. rrhus, -since'the effective diameters of the tapered gaging surfaces progressively increase they will enter the workpiece bore yduring the honing operation until the parts thereof having .the -preselected diameter operatively enter 'the bore whereupon cessation or termination of the honing operation is initiated. j A further object of the invention is to provide a variable diameter sizing or gage ring means, such as above indicated, together with adjustable means for rendering any predetermined diametrical part of the gage ring means effective at .the moment the limit switch or .control device isuactuated. v.Such adjustable means may take several different forms. In accordance with the embodiment of ofthe inventionf herein illustrated, there is provided a xliinit'fswitch adapted tobe actuated by switch actuating Alr'ie'ar i s in vable axially in unisonfv'vith the varying diarn- .0.31: ,1 '1` v l v lll'nited States- Pate-nef() eter gage ring means. This switch actuating means is adjustable relative to the limit switch as well as the gage ring means into any one of a series of positions, such positions forming in effect a series of spaced steps. Accordingly, actuation of the limit switch is controlled so as to take effect when any pre-selected diametrical portion of the gage ring operatively enters the bore of the workpiece, such portion being pre-selected by adjusting the limit switch actuating means into the position in which it will actuate the limit switch when such pre-selected gage ring portion operatively enters the workpiece bore.

Other objects of this invention will appear in the following description and appended claims, reference being had to the accompanying drawings forming a part of this specication wherein like reference characters designate corresponding parts in the several views.

Fig. l is a view in elevation and partly in longitudinal mid-section illustrating a honing apparatus constructed in accordance with one embodiment of the present invention.

shown in Fig. 1.

Before explaining in detail the present invention it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also lit is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.

In the drawings there is illustrated an embodiment of a honing tool or apparatus which is attachable at its upper or driven end to the conventional machine spindle. The honing tool, depending upon the type of machine with which it is used, may extend either vertically, or at an angle such as 45 or horizontally. In the present instance the tool is shown in a vertical position, although it is understood that this is merely for illustrative purposes.

lIn accordance `with the present embodiment of the invention the honing tool is provided at its lower end with an abrading head 12 carrying radially shiftable circumferentially spaced abrading elements 12a. The abrading head may be constructed and operated in substantially thesame manner as the abrading head in my copending application Serial No. 390,555. The abrading head 12 is carried by a lower enlarged end of a tubular shaft or supporting -member 13 which extends upwardly from the abrading head, The honing tool in the present instance is provided with a .tubular honing tool spindle or spindle member 14 formed at its lower end with a reduced cylindrical portion 14a telescopically received within the upper portion of the tubular shaft or supporting member 13 and secured thereto against relative displacement. At its upper end the spindle member 14 is provided lwith external threads 15. A tubular pilot member 16 has a reduced lower portion fitting within the upper end of the lspindle 14 and attached thereto through the medium of pins 17. Threaded onto the upper end ofthe spindle member 14 are lock nuts 18. Secured to the pilot mem- `ber.,16 are pins 19 for connecting the pilotmember ``to a. hollow spindle coupling which -in turnl connected,lin accordance with conventional practice, tosui-tablemechuism for reciprocating and rotating the `spindle 14, shaft member 13 and the abrading or honing tool head 12.

Extending freely through the tubular spindle member 14 and shaft member 13 is a cone rod 20 connected at its lower end to cone means (not shown) for moving the abrading elements 12a radially outwardly against the surface of the bore W of the workpiece W within which the abrading head 12 is located as shown in Figs. 1 and 3. ln the present instance radial outward movement of the abrading elements 12a is accomplished by axial movement of the cone rod in a downward direction. -Upon completion of the honing operation the cone rod 26 is shifted in an upward direction thereby enabling the abrading elements 12a -to be moved radially inwardly free of the work bore W by means of springs (not shown). The foregoing construction is illustrated in my above identified application.

The upper end 20a of the cone rod 20 is adapted to be contacted by an incremental feed means, such as illustrated in -my above identified application. Such feed means progressively forces the cone rod 20 downwardly to cause the cone means at the lower end thereof to expand the abrading elements 12a against the bore W of the workpiece. 'Spring restoring means is provided for shifting the cone rode 20 upwardly when the pressure of the incremental feed means is released, thus permitting the abrading elements 12a `to move radially inwardly. Upward shiftable movement of the cone rod 20 is accomplished by means of a coil spring 21 having the lower end thereof engaging an annular shoulder on the spindle member i4. The upper end of this spring engages a wash-er 22 embracing the cone rod 20 and held in posi- 'tion by means of pins 23 secured to the cone rod. Thus, it will be seen that upon release of downward pressure on the cone rod 20 by the incremental feed means the spring 21 will shift the cone rod 20 upwardly thus permitting lthe abrading elements to collapse under :spring tension.

The honing `tool in :the present embodiment is provided with a cylindrical gage control body 24 having the lower lend portion thereof provided with external threads 25. A gage supporting ring or adapter 26 is provided with internal threads engaging the threads 25 on the gage control body 24. The adapter or gage supporting ring 26 is thus adjustable in an axial direction on the lower threaded end of the gage control body 24. At any such adj-usted position the gage supporting ring 26 is held against displacement by means of a set screw 27 and a brass plug 27a interposed between the end of the :set screw and the threads 25, see Figs. 3 and 4.

Supported beneath and in `s-mooth engagement with :the

bottom surface of the ring member 26 is an annular size gage ring member .28 to the bottom of which is welded a lower size gage ring member 29. The members 28 and 29 form a unitary gage supporting ring. rl`wo radially disposed pairs of bolts 30 are provided with :threaded shanks which are threaded into ta-pped holes 26a in the ring member 26, see Fig. 5. Each bolt 30 terminates at its lower end in an enlarged -head 30a. Between this head and its threaded shank each bolt 30 is formed with a shank 30b enlarged so as to smoothly abut the flat bottom face of the ring member 26. Each shank portion 30'b yis disposed in an enlarged =hole extending through the gage ring member 28. An annular space 31 is thus provided around each shank pontion 30b, the height of which is sufficient to enable the gage ring member 2S -to be freely disposed between the bolt head 30a and the bottom surface of the supporting ring 26. The annular space 31 around each shank portion 30b enables the sizing gage support 28, 29 to oat or shift laterally in either direction.

Thus, the annular gage supporting unit or sizing ring 28, 29 is permitted to shift or float laterally relative to the supporting ring 26 a `substantial amount, such as from :ten to thirty thousandths of an inch, depending upon the type of work being honed.

As illustrated in Fig. 4, the gage ring 28, 29 is formed with two pairs of oppositely disposed protuberances or projecting portions 32, each having a slot or notch to receive a hard gage wear insert member 33. The gage supporting ring or adapter 26, see Fig. 4, is machined to provide two pairs of oppositely disposed flat surfaces 26b which lie inwardly of the gage ring projecting portions 32. The gage holder 26 is formed with pairs of annular portions 26e, each opposed pair having less diameter than the diameter through each opposed pair of outer gaging surfaces 33a of the gage members 33. As shown in Fig. 3, the outer gaging surface 33a of each gage member 33 terminates at its lower end in a tapered lead portion or cam means 33h. These lead portions are adapted to displace or cam the gage ring unit 23, 29 laterally due to their lateral float mounting on the bolts 30 thereby centering the gage ring unit axially with the bore W of the workpiece W. From the tapered lead portion 3311, see Fig. 3, each gage member 33 progressively increases in depth or thickness thereby causing the gaging surface 33a to taper upwardly and outwardly. It is understood that the pairs of opposed gage members are the same in construction and that the diametrical relation of the tapering surfaces 33a of one pair corresponds to the other pair.

Referring to Fig. 3 it will be seen that each gage member 33 has its outer bore engaging surface 33a increasing in diameter upwardly from the tapered lead portion 33h. In accordance with the embodiment herein illustrated, by way of example, the arrows A', B', C', D and E indicate successive points or steps on the gage ring members 33, progressively increasing upwardly in effective diameter, any one of which may be preselected so that upon operative entry of the gage members at such point cessation or termination of the honing operation will be initiated. As an example, the gage means in Fig. 3 has entered the bore W to the locality indicated at E', the maximum honing diameter permitted in the illustrated embodiment. When this occurs a limit switch or other control means, as hereinafter described, is actuated to initiate termination of the honing operation.

interposed between the cylindrical gage control body 24 and the spindle member 14 is an upper ball race ring 34 which is secured to the spindle member 14 by means of attaching screws 35. Underlying the ring 34 is a second ball race ring 36 which is free with respect to the members 14 and 24. Interposed between ball race rings 34 and 36 are anti-friction ball bearings. A compression spring 37 is interposed between the ball race ring 36 and a lower bushing 38 free with respect to the spindle 14 and gage control body 24. The bushing 38, engaged by the lower end of compression spring 37, is supported on a sleeve 39 press fitted into the gage control body 24 and free with respect to the spindle 14 so as to have no rotative movement imparted thereto by the spindle. A limit switch control member or arm 40 is attached to the upper end portion of the gage control body 24 through the medium of screws 41.

In the present embodiment the feed means, which may be hydraulic or other suitable mechanism, for shifting the cone rod or shaft 2t), is controlled by a limit switch generally indicated at 42 having a switch actuating member 43 adapted to be engaged and actuated so as to terminate the honing operation.

Adjustably mounted on the upper end of the control member or arm 40 is a trip block 44 having a laterally extending arm portion 44a provided with a tapped hole for adjustably receiving the threaded shank of a limit switch actuator 45. This actuator terminates at its lower end in an enlarged annular actuating member or head 45a. It will be seen that the limit switch actuator 45 together with its actuating member 45a may be adjusted vertically by reason of its threaded connection with the trip block arm member 44a. It is held in any adjusted position by means of a lock or set screw 46, see Fig. 6,

ment of latch member 53 in latching notch 51.

satana between which and the threaded shank of a brass tting. v f ,y In the present embodiment the tripblock 44 is mounted member 45 is for vertical adjustment on the limit switch control mem- 1 ber or arm 40 thereby enabling the limit switch actuating member 45a to be adjustably positioned at variable yselected distances from the limit switch actuating member 43, such adjusted positions being indicated at A, B, C, D and E in Fig. 2. The control member 40 is provided with a corresponding number of notches 47,

48, 49, 50 and 51. The trip block 44 and its arm extension 44a are provided with a horizontal slot 52 (Fig. 6) which receives a selector locking lever or latch member 53 pivoted at 5d to the arm extension 44a. locking lever at one side of its pivot may be disposed This in any one of the latching notches 47-51, thereby latching the trip block 44 in vertically adjusted position on the control member 40. The locking lever 53 at the Vopposite side4 of its pivot is offset outwardly in the slot `52, see Fig. 6, and terminates in an enlarged finger Ipiece 53a which is spaced from the trip block arm ex- ,v tension 44a thereby enabling the finger piece 53a to be pressed inwardly to disengage the locking lever or latch This sprin g From the foregoing it will be apparent that the latching i of trip block 44 in the notches 47-51 will result in adjust- `ably disposing the switch actuating member 45a respectively at positions A, B, C, D and E, illustrated in Fig. 2. `With the switch actuating member adjustably set at posi- A"tion A termination of the honing operation will be effected or initiated upon operative entry of gage ring portions A' into the workpiece bore. Likewise when the switch actuating member 45a is adjustably set at position B, position C, position D or position E termination of the honing operation will be etected or initiated upon operative entry into the workpiece bore respectively of gage ring portions B', C', D', or E'. As illustrated in Figs. 2 and 3, by way of example, the trip block 44 is disposed at its uppermost position on control arm 40 by engage- This `adjustment of the trip block da disposes the switch actuating member 45a in its furthermost adjusted position with respect to the limit switch member 43, as shown in full lines in Fig. 2. By virtue of this adjustment the gage ring members 33 will enter the bore W to the position shown at E in Fig. 3, representing the maximum diameter to which the bore is to be honed before terminating the honing operation.

Although in the present embodiment there are ve varying diameter gage ring portions or steps A-E, it will be understood that the number of steps varying in diameter may be increased ror decreased. The effective diameters of the gage ring steps, illustrated in Fig. 3, may,

`for example, vary in dimensional increments of one-half j, previously required in removing and dismantling the tool in `order to change gage rings so as to accomplish the results achieved by the present invention.

I claim:

l. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters. to hone said bore, said gage unit comprising leading means for initially entering the bore and gage ring means increasing in one direction in e'ifective diameter relative to said leading means for selectively controlling the effective diameter to which the workpiece bore is to be honed, switch control means operative preparatory to initiating termination of the honing operation by releasing the honing means from honing engagement with the workpiece bore, actuating means movable in unison with said gage unit for actuating said switch control means, and means adjustable in a direction parallel to the axis of said spindle means for varying actuation of said switch control means by said actuating means to correspondto operative entry of any pre-selected diametrical portion of said gage ring means into the workpiece bore. ,j

2. ln a honing apparatus for honing the bore of` a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent onee'nd thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end `of the workpiece bore through which the honing means enters to hone said bore, said gage unit comprising gage ring means having a leading end adapted to initially enter the bore and also having beyond said leading end a plurality of successive diametrical gage portions progressively increasing in effective diameter relative to said leading end in a direction away from said leading end, and means controlled by said gage ring means for signalling operative entry of any one of said gage po-rtions into the bore preparatory to initiating cessation of the honing apparatus.

3. Honing apparatus according to claim 2 comprising means for mounting said gage unit for limited but substantially free movement transversely of the spindle means an amount approximating ten thousandths of an inch or more.

4. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, sai-d gage unit comprising gage ring means having a taper leading end adapted to initially en ter the bore and also having beyond said leading end a plurality of successive diametrical gage portions progressively increasing in effective diameter in a direction away from said leading end, control means operative preparatory to initiating cessation of the honing operation, and actuating means movable in unison with said gage unit for actuating said control means upon operative entry into the workpiece bore of any preselected diametrical gage portion of said gage unit.

5. Honing apparatus according to claim 4 comprising means for mounting said gage unit for limited but substantially free movement transversely of the spindle means an amount approximating ten thousandths of an inch or more.

6. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, said gage unit comprising gage ring means having a taper leading end adapted to initially enter the bore and also having beyond said leading end a plurality of successive diametrical gage portions progressively increasing in effective diameter in a direction away from said leading end, control means operative preparatory to initiating cessation of the honing operation, actuating means movable in unison with said gage unit for actuating said control means, and means for varying actuation of said control means by said actuating means to correspond to operative entry into the workpiece bore of any pre-selected diametrical gage portion of said gage unit.

7. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable Spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, said gage unit comprising gage ring means having a taper leading end adapted to initially enter the bore and also having beyond said leading end a plurality of successive diametrical gage portions progressively increasing in effective diameter in a direction away from said leading end, control means operative preparatory to -initiating cessation of the honing operation, actuating means movable in unison with said gage unit for actuating said control means, and means for adjusting the relative positions of said actuating means and control means to provide for actuation of the latter upon operative entry into the workpiece bore of any preselected diametrical gage portion of said gage unit.

8. Honing apparatus according to claim 7 wherein said adjusting means comprises means for varying the position of said actuating means relative to said control means.

9. Honing apparatus according to claim 7 wherein said adjusting means comprises means for varying the relative positions of said control means and actuating means.

10. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, said gage unit comprising leading means for initially entering the bore and gage ring portions successively increasing in eiective diameter relative to said leading means, switch control means adapted to be actuated preparatory to initiating cessation of the honing operation, and adjustable means for permitting operative entry of any one of said gage ring portions into the workpiece bore at the moment of actuation of said switch control means.

1l. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindie means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, said gage unit having leading means for initially entering the bore and a plurality of diametrical gage portions successively increasing in effective diameter relative to said leading means, control means adapted to be actuated preparatory to initiating cessation of the honing operation, actuating means movable in unison with said gage unit for actuating sai-d control means, and means for adjusting the position of said actuating means relative to the control means to provide for actuation of the latter upon operative entry into the workpiece bore of any pre-selected diametrical gage portion `of said gage unit.

l2. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, said gage unit comprising leading means for initially entering the bore and annularly spaced radially projecting gaging means increasing in eiective (ill diameter in the direction away from the honing means and said leading means, and means adapted to be actuated preparatory to initiating cessatio-n of the honing operation upon predetermined entry into the` workpiece bore of any pre-selected diametrical portions of said gaging means.

13. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, said gage unit comprising leading means for initially entering the bore and annularly spaced radially projecting tapered gaging means increasing in eiective diameter in the direct-ion away from the honing means and said leading means, and adjustable means adapted to be set to preselect an effective diameter of said gaging means and operative preparatory to initiating termination of the honing operation simultaneously with the operative entry of such pre-selected diametrical portion of the gaging means into the workpiece bore.

14. In a h-oning apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, said gage unit comprising gage ring means having a plurality of gaging portions successively increasing in effective diameter in one direction, switch control means adapted to be actuated for initiating cessation of the honing operation, and adjustable means for controlling operative entry of any one of said portions of said gage ring means into the workpiece bore at the moment of actuation of said control means.

l5. Honing apparatus according to claim 14 comprising means for mounting said gage unit for limited but substantially free movement transversely ofthe spindle means an amount equal to ten thousandths of an inch or more.

16. In a honing apparatus for honing the bore of a tubular workpiece having reciprocable and rotatable spindle means and honing means mounted adjacent one end thereof, a reciprocable annular plug gage unit encircling said spindle means and operative at the end of the workpiece bore through which the honing means enters to hone said bore, said gage unit comprising gage ring means having a plurality of gaging portions successively varying in elective diameter, switch control means adapted to be actuated for initiating cessa-tion of the honing operation, actuating means movable in unison with said gage unit for actuating said switch control means, an-d adjustable means for varying actuation of said switch control means oy said actuating means to correspond to operative entry of any one of said portions of said gage ring means into the workpiece bore.

17. Honing apparatus according to claim 16 wherein said adjustable means comprises means for adjusting the position of said actuating means relative to said switch control means.

18. Honing apparatus according to claim 16 wherein said adjustable means comprises means adapted to be adjusted to vary the relative positions of said switch control means and actuating means.

References Cited in the le of this patent UNITED STATES PATENTS

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