US1995485A

US1995485A - Machine to countersink twenty holes in a wheel hub shell for short spokes

Info

Publication number: US1995485A
Application number: US625991A
Authority: US
Inventors: Tormyn Herman; Frank F Wiethoff
Original assignee: Motors Liquidation Co
Current assignee: Motors Liquidation Co
Priority date: 1932-07-29
Filing date: 1932-07-29
Publication date: 1935-03-26
Anticipated expiration: 1952-03-26

Description

March 26, 1935. H. TORMYN ET'AL 1,995,485.

MACHINE TO COUNTERSINK TWENTY HOLES IN A WHEEL HUB SHELL FOR SHORT SPOKES Filed July 29, 1932 4 Sheets-Sheet 1 WMWIW I March 26, 1935. Y H TORMYN gr AL 1,995,485

MACHINE TO COUNTERSINK TWENTY HOLES IN A WHEEL HUE SHELL FOR SHORT SPOKES Filed July 29, 1932 4 Sheets-Sheet 2 4 Sheets-Sheet 3 I00 I f H. TORMYN ET AL Filed July 29, 1952 $977270. 5' zrzzyzz Ci @2'0771? @T a z'eziofl WA M MACHINE TO COUNTERSINK TWENTI HOLES IN A WHEEL HUB SHELL FOR SHORT SPOKES March 26, 1935.

March 26, 1 935. H 'TORMYN ET AL 1,995,485

UNTERSINK TWENTY HOLES IN A WHEEL HUB SHELL FOR SHORT SPOKES Filed July 29, 1932 4 Sheets-Sheet 4 Patented Mar. 26, 1935 HOLES IN A,VVHEEL .H

snon'r SPOKES SHELL FOR Herman Tormyn and Frank F. Wiethoff, Detroit,

Mich assignors to General Motors Corporation, Detroit, Mich., a corporation of Delaware Application July 29, 1932, Serial No. 625,991. 1

' '7 Claims." (01. 78

. This invention relates-to= manufactureof wire wheels 'and hasparticular reference toa machine for the countersinking oi. the-spoke holes-in the, :wheel hub. The machine of the present invention .isone ofztenmachines and.

follows in sequence the operation of the "machineldescribed in our copending application, Serial No. 625,990, filed July 29, 1932.

After the wheel hub has been circumferem.

. tially punched with the plurality of holes for theshort spokes as setout in the copendinglap; plication referred to, :the wheel hubfis trans:

ferred to the machine of the present invention in which the holes are countersunk Jon the in-i ner portion of the hub. The machine comprises the lower die shoe and the top die or is fitted that punch holder slide in which the punch-holders aremounted. The punch holder slides have a face cooperating with the cams on the guide block to force the punch holders outwardly when the top shoe descends, the outward movement of the punch holders causing the punches to countersink the spoke. holes.

On the drawings: I Figure 1 isa front view of the press of the invention. 2

- Figure 2 is. aside view of the structure of Figurel.

Figure 3 is an enlarged sectional detailed view through the center of the press showing only the mechanism for countersinking the openings.

ing the parts 'in separated relation before the top shoe has descended upon the die shoe.

Figure 5 is a plan view taken substantially on the line 55 of Figures 3 and-4 with parts broken away clearer to illustrate the construc-' tion.

Figure 6 is a perspective View block.

Figure '7 is a perspective View of one of the punch holders.

Referringto the drawings, the numeral 2 indicates the machine or press of the invention as 'a whole The press comprises the upright frame at the upper portion of which an electric motor 4 'is mounted. The motor has the driving pulley 6 which drives 'a belt 8 which in turn drives a flywheel lilrigidly mounted on the axle 12which extends acrossthe frame of themachine and at the opposite side has a gear wheel (not shown) mounted thereon which meshes of the guide Figure 4 is a view similar to Figure 3 but show-' Withand drives the large gear 14 rigidly mounted on the shaft 16 having a crank 18 intermediate its ends. The crank 18 has attached thereto the connecting rod-20 which operates the crosshead 22 suitably attached to the top shoe 24 of the die. The lower die shoe indicated at 26 and a part thereof is resiliently mounted on the ends of the pressure pins 36 resting on alower plate 30.; Suitable pins 32 connect the plate 30 with a second plate 34 secured on a; pis-" ton 35 connected to a piston operating a cylinder 37 to form an air cushion. The pins 36 abut at'their lower ends against the plate 30 and at the upper ends. against the bottom of the slideholder 38 (Figures 3 and'4). This structure gives a resilient mounting to the slide hold- 81 38., t 4 A handle 40 operating a linkage system 42 operates a suitable clutch (not shown) which causes the small gear on the end of-the shaft 12 tobe engaged with the shaft and to rotate the gear 14. After one operation of the punch a suitable throw-out mechanism will throw the clutch out-0f engagement with the gear. This mechanism is not shown but is conventional .and well known in the art. A suitable brake' drum is shown at 44 having brake shoes 46 operated from a suitable link-age 48.

The parts so far described are conventional and are well known in the art of presses.

Referring to Figures 3 and 4 the die of. the invention comprises the top die shoe 24 and the lower die shoe 26. The topshoe is reciprocable with the crosshead-22 and has openings 50 in which there are mounted the bushings 52 slidably'toguide the'guide pins 54 rigidlymounted at 56 in the-die shoe. V The die shoe has rigidlymounted at its center the slide guide block 58 held to thedie shoe by means of the machine bolts 60. The guide block 58 is best shown in theperspective view in Figure 6 and is shown to be conical at its upper end.

Theconicalportion has ten T-shaped grooves 62 chine bolts which pass through openings in the cap 68 and are threaded into the lower portion 66. By referring toFigures 3 and 4, it will be noted that the bolts '70 are outwardly and downwardly inclined so that in their final position, they will hold the cap portion 68 spaced from the lower ring portion 66.

In the space between the ring portion 66 and the cap 68 ten radially arranged punch holders '72 are slidably mounted. One of these holders is shown in detail in Figure 7 and each comprises the inner T-shaped head '74 which slidably fits in one of the slots 62 of the guide block 58. Each punch holder has the upper and lower openings '76 and 78 and the vertical slot 80. In theends of P the openings '76 and 78 atthe outer face 82 of the slide the punches 84 are mounted. The

openings

76 and 78 extend allthe way through the block in order that the punchmay be knocked. out for purposes of replacement. Suitable openings 86 are positioned at right angles to the

openings

76 and 78, the purpose of which is'to receive screws 90 which rigidly hold the punchesiid in the slide blocks 72. A projecting portion or tongue 92: on the lower portion of the slide blocks fits into the corresponding groove 94 on theupper face of the lower ring member 66 and guides the blocks in adefini te path. 7 The bolts it? pass through the slots 80- the slide blocks and have the bushings 96 therearound inside the slots to take up wear and to prevent rattle and looseness of the parts).

The cap portion 68 andthe outer portion of the punch holders 72am shaped to receive the wheel hub 98'as shown Figures 3 and 4.

The topdie or shoe 50 inchides'theblock mo and the pressure pad or positioning ring 1 02-; The ring 102 has a shape 104 at its interior tion to conform to the shape of the wheel hub ad jacent the punch holders "72 and pqmchholder slide 38 as is shown in Figures 3 and 4. When the top shoe descends the shaped part 104 fits on to the wheel hub at the punch holder slidesand the block passes through the opening I06 in the wheel-hub and strikes the top race of the cap 68. p v

Theoperati'on of the die is as fol-lows: When the top shoe descends and the block comes in contact with the cap 68 and the ring 102 with the wheel hub 98, it will push the holder slidesa downwardly from the position shown in Figure 4- to that shownin Figure 3. This will cause the in ward'ly projecting ring 108% at the bottom of the ring member 66 of the slide holder to leave the projection 64 on the slide guide'block 58 or cause arelati-ve movement of the slide holder relative to the guide block 58. This movement'wil l cause the T-heads "T4 of the punch holders tosl ide or move in the 'l-Fslots 62 of the-conical portion of the guide block 58 to force-the punch holders 72 outwardly and cause the punches 84 to enter thespoke openings the wheel huh and counter: sink the openings. The downwardmovement of the slide holder will force the pressure pins 36 downward which in turn will press the plate 30' downward against the tension of the air. cushion and when the, top shoe 24 moves upward the air cushion will force the plate 30 upward and cause the pins 36' to return the s1ideho1'der'tothe position shown inFi'gure 4'.

. When the parts have been returned to the position shownin Figure 4'. the clutch mechanism previously mentioned will throwv the power from the shatt 1 6 80 that the operator may remove the hub- 98 and place anew one. in. the die.

By again operating the handle 40-the new wheel hub: will have: its: spoke openings countersunk in the manner previously described.

We claim:

1. In a machine for countersinking spoke holes in a wheel hub, as a sub-combination, a holder slide comprising a lower ring portion and an upper cap portion, said lower portion having a plurality of grooves, a plurality of slotted. punch holders slidable between said. ring and cap portions, said holders having tongues fitting in said grooves, bolts secured to and uniting said ring and cap portions, said bolts passing through the slots in said punch holders.

2'. In a machineto countersink spoke holes in a wheel hub, adie shoe, a guide block rigidly mounted on the shoe, said block having a plurality of inclined T-shaped slots, a slide holder slidably mounted over the block' and adapted to receive a wheel hub having aplurality of spoke openings, a plurality of punch holders slidably mounted on said slide holder, each punch holder having a T-shaped'head operating in one of said IT-shaped slots; countersinking punches insaid punch, hoide rs, mom to'cause the holder slide. to slide-over the block to cause the inclined 'Fslots: to mice the punch holders to move toward the'wheel hub to countersink the. spoke openings;

3.11:. a machine to comrtersink: spoke holes in. a wheel hub, a die shoe, 5) guide: block rigidly mounted on said. die shoe, a slide holder movably mounted. on said guide block and adapted toreceive a wheel hub having a plurality 0d spokeopenings. a plurality of punch holders movabliv momted in. said slide holder, punches in said. punch holders, said punch holders actuated by the guide block: by themovement of the slide hoilsder relative to the block, and means. to cause the slide holder to movev relative to the block to cause. the punch holders: to move toward the wheel huh to countersink the openings.v

4 In a machine to countersink spoke holes in a;- wheel; hub, a die shoe, 2. guide block rigidly mounted on said die shoe, a slide. holder movably ted over and astound. said guide block and. secured thereto and. adapted to receive a wheel:

having: a. plmzality ofispoke openings; a pluof punch. holders movably mmmtedi in said: slide holder, punches in said punch holders, saidi punch holders actuated by the guide block by the movement of the slide holder relative to! the block, and means to cause the slide holder to movei relative to the block. to cause the punch holders to move toward the wheel hub to countersink. the

openings;

.5. m a for countersink-mg spoke holes in .awiue: wheel huh. a lower die shoe, a guide block secured thereto, said guide block having a plurality of cam surfaces at the upper endthere of, a punch holder slidefitting over and movabl'y secured. to said block for reciprocable movement, said slide shaped to receive a. wheel. hub, a. plu-- rality of punch holders secured to and. fitting in said slide for sliding movement relative thereto, the ends of said holders engaging said; camsurfaces, punches in said punch holders, a reciprocable top shoe, apad. secured thereto having a surface conforming in shape to the shape of the holder slide and wheel. hub, a block onthe top shoe. adapted toengage the. holder slide, the. downward movement of said top shoe causing the block and the pad. to engage the holder slide and wheel hub, respectively, to push the holder slide downwardly and cause the camv surfaces tomove the slides toward thewheel hub to cause the punches to countersink the openings in the hub? r I t i 1 .6. In: av machine for. countersinking spoke holes in a wire wheel hub, a lower die shoe having an upwardly projecting block portion, said block portion having a plurality of cam grooves at the upper end thereof, a punch holder slide slidably secured to said block portion, said slide adapted to receive a wheel hub, a plurality of punch holders mounted in and guided in said slide for sliding movement and having a part operating in said grooves, punches secured in said holders, a reciprocable top shoe over said die shoe having a pad toback the hub and cooperating with said slide holder to hold the wheel hub in position when the top shoe is reciprocated, the downward movement of said top shoe moving said holder slide and wheel hub downwardly and causing the cam grooves to move the punch holders in the slide holder and toward the wheel hub to cause the punches to countersink the spoke holes in the hub.

7. In a machine for countersinking spoke holes in a wire wheel hub, a'lower die shoe, a top shoe over the die shoe, means to mount said top, shoe for reciprocating movement relative to the die shoe, a cam portion on said die shoe having a plurality of cam surfaces, a punch'holder slide secured to and slidable over said portion and adapted to receive and correctly position a wheel hub, a plurality of punch holders slidably mount-' ed in said holder slide and having one end thereof engaging the cam surfaces, punches in the other ends of said punch holders, means to reciprocate said top shoe to cause said holder slide to slide over said portion to cause the punch holder ends to move over said cam surfaces to move the punch holders to cause the punches to countersink the spoke holes in the wheel hub.

HERMAN TORMYN. FRANK F. WIETHOFF.