US1200395A - Metal-working machine. - Google Patents

Description

G.A.scH|PPER.. METAL WORKING MACHINE.

APPLICATION FILED NOV- 20,"I9I3..

q/Uibneoow G. A.- SCHIPPER.

METAL wonKlNG MACHINE.

APPLICATION FILED NOV. 20, I9l3.

1,200,395. Patented 0t.'3,1916.

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G. A. SCHIPPER.

METAL WORKING MACHINE.

APPucATIoN FILED Nov.'2o. |913.

Patented 0G15. 3, 1916.

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G. A. SCHIPPER.

METAL WORKING MACHINE.

APPLICATION FILED NOV- 20 1913. I 192001595. v Patented Oct. 3,1916.

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GEORGE A. SCHIPPER, OF AURORA, INDIANA, ASSIGNOR OF ONE-HALF TO GEORGE IVI. STEDMAN, OF AURORA, INDIANA.

METAL-WORKING MACHINE.

Application led November 20, 1913.

To all whom t may concern.'

Be it known that I, GEORGE A. SCHIPPER, a citizen ofthe United States, residing at Aurora, in the county of Dearborn, State of Indiana, have invented certain new and useful Improvements in Metal-VVorking Machines; and I do hereby declare the following to be a full, clear, and exact description of the'invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This'invention relates to metal working machines and particularly to a machine for shaping spur gears, beveled gears,l internal gears, cams, ratchets, sprockets, broaching and which may be also utilized for cam grinding.

The object of the invention resides, broadly speaking, in the production of a metal working machine of the type named which is capable of turning out a large output of work and of producing many dien ent kinds of work.

A further object of the invention resides in the provision of a metal working machine of the character named which employs cutters carried by a reciprocating ram for operating upon the work and which embodies improved structure and mechanism whereby one of the cutters will operatively engage the work during each stroke of the ram.

A still further object of the invention resides in the provision of a metal working machine of the character named of such construction and operation as'to enable the use of straight cutters without clearance grinding, and which will permit such cutters to be sharpened while on the machine.

Another object of the invention resides in the provision of a metal working machine of the character named which will be simple in construction and which will require com` paratively little attention to keep same in proper working order.

Vith the above and other objects in view the invention consists lin the details of con-- struction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claims.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of refer- Specicaton of Letters Patent.

Patented Oct. 3, 1916.

Serial No. 802,126.

ence denote corresponding parts in the several views, and in which- Figure 1 is a front elevation of a machine constructed in accordance with the invention; Fig. 2, a side view thereof; Fig. 3, a plan View of the invention; Fig. 4, a partial section on the line 4+4 of Fig. 3; Fig. 5, an enlarged section on the line 5 5 of Fig. 1; Fig. 6, a section on the line 6-6 of Fig. 4; Fig. 7, a transverse section through one of the cutters and its holder and also through the ram and ram retainer; Fig. 8, a section on the line 8-8 of Fig. 1; Fig. 9, an elevation of the indexing mechanism which automatically controls the feeding of the work to the cutters, the parts of the mechanism being in the position they wouldl occupy when the work is stationary and being operated upon by the cutters; Fig. 10, a view similar to Fig. 9 with the parts of the mechanism in the position they would occupy when the work isbeing rotated to present another surface to be operated upon on the neXt stroke of the cutters; and Fig. 11, a section on-the line 11-11 of Fig. 2.

Referring to the drawings the invention is shown as comprising a base 15 from which rises a column 16. The upper end of the column 16 terminates in a laterally directed portion 17 which carries at its free end a bearing 18 for a purpose that will presently appear. The column 16 is substantially U- shape in cross section and the `arms thereof are provided at their free ends respectively with outwardly directed guide ribs 19. Slidably mounted on the ribs 19' for vertical movement is a carriage 20 and a sub-carriage 21 disposed above the carriage 20. The carriage `2O is supported upon the upper end of a feed screw 22 which latter is threaded in another feed screw 23 and this last named feed screw is in turn threaded in a stud 24 rising from the base 15. Fixed on the feed screw 22 is a beveled gear 25 which meshes witha beveled gear 26 lixed on a shaft 27, the latter being rotatably mounted in suitable bearings depending from the base of the carriage 20. Secured against one side of the carriage 20 is a bracket 28 in which is rotatably mounted a shaft/29 one end of which terminates in a crank 30, while the other end thereof has fixed thereon a beveled gear 31 which meshes with a beveled gear 32 fixed on the adjacent end of the shaft 27. Formed on the carriage 2O are alined journal bearings 33 in which is` rotatably mounted a shaft 34. One end of this shaft 34 terminates substantially at ythe center of the carriage and has fixed thereon a double cam 35 for a purpose thatv will presently appear. The other end of the shaft 34 extends beyond the side of the carriage remote from the bracket 28 and has fixed thereon a worm wheel 36. The subcarriage 21 is provided centrally with spaced ears 37 between which is rotatably mounted a roller 38 having its periphery in engage` ment with the periphery of the cam 35. By this construction it will be apparent that upon each rotation of the shaft 34 the cam 35 will coperate twice with the roller 38 to effect a predetermined elevation of the sub carriage 21.

Supported upon the sub-carriage 21 is a ram retainer 39 which is provided at one end with depending ears 40 and 41. The ear 40 is pivoted upon a tubular member 42 secured to'and projecting through the front side of the sub-carriage 21, while the ear 41 is pivoted to a stub shaft 43 carried by and projecting inwardly from the inner side of the sub-carriage. From this construction it will be obvious that Vthe ram retainer 35 can be moved into different angular relations with respect to the sub-carriage 21. In order to secure the ram retainer 35 in desired angular relation to the sub-carriage 21 there is attached to the lower. side of the ram retainer a depending arcuate plate 44 provided with an arcuate slot 45 and having teeth 46 formed on the edge thereof re mote from the ears 40 and 41. This plate 44 extends .across the outer side of the subcarriage 21, which latter carries a threaded stud 47 projecting through the slot 45 and having engaged thereon a nut 48. Rotatably mounted in the outer side of the subcarriage 21 is a stub shaft 49, said stub shaft being disposed adjacenty the teeth 46 and having fixed thereon a pinion 50 meshing with the teeth 46. The shaft 49 carries an operating handle 51 for convenience in effecting the rotation thereof. By this construction it will be apparent that upon rotating'the shaft 49 in one direction the end 41. During the operation of the machine the ram 52 is adapted to be reciprocated upon the ram retainer 39 through the instrumentality of the following structure. Rotatably mounted in the tubular member 42 is a tubular member 54 which has keyed on the inner end thereof a gear 55. Formed on the side of the gear 55 remote from the front side of the sub-carriage 21 are parallel guide ribs 56 between which is slidably mounted a block 57 provided with a stud 58. Engaged through the block 57 and extending parallel to the guide ribs 56 is a screw 58 one end of which is rotatably mounted in a lug 59 formed on the adjacent side of the gear 55. Fixed on the screw 58 between the lug 59 and block 57 is a beveled gear 60 which meshes with a beveled gear 61 fixed on a shaft 62 rotatably mounted in the tubular member 54. The end of the shaft 62 remote from the gear 61 is exf tended beyond the corresponding end of the tubular member 54 and has threaded thereon a lock nut 63 whereby said shaft 62 can be secured against rotation relatively to the tubularmember 54. Pivotally mounted on the stud 58 is one end of a link 64 and the other end of this link is pivotally mounted between the ears 53 which depend from the ram 52. Journaled in the front side of the sub-carriage 21 and in a bearing 65 formed integral with the adjacent end wall of the sub-carriage is a shaft 66 which has fixed thereon a pinion 67 in mesh with the gear 55. The end of the shaft 66 remote from the gear 55 has fixed thereon a beveled gear 68 which meshes with ya beveled gear 69 fixed on a vertical shaft 70 rotatable in a bearing 71 carried by the stub shaft 43 and also rotatable in the bearing 72 carried .at the upper end of the column 16 and in a bearing 73 carried at the lower end of said column. Rotatably mounted in bearings 74 and 75 secured to the column 16 and the base 15 is a drive shaft 76 which is disposed at right angles to the shaft 70 and has fixed thereon a beveled gear 77 which meshes with a beveled gear 78 fixed on the lower end of the shaft 70. Fixed on the shaft 76 between the bearings 74 `and 75 is a step pulley 79 whereby said shaft may be connected c eccentrically to the gear 65 through the medium of the block 57 it will be apparent that the rotation of the lgear 65 will effect a reciprocation of the ram 52. The length of the stroke of the ram 52 can be easily varied by moving the block 57 toward or away from the center of the gear 55. This is accomplished by loosening the nut 63 and then rotatingthe shaft 62 in a desired direction. rlhis rotation of the shaft 62 will be transmitted by the gears 61 and 60 to the screw 58 and the rotation of this screw 58 will i effect the desired movement of the block 57.

The ram 52 directly supports the cutting tools of the machine and the tools supported by said ram in this instance are cutters for shaping spur gears. In order to utilize both strokes of the ram in effecting the cutting operation two tools are mounted upon the ram each of which includes a cutter and the cutters of these tools are disposed in opposition to each other as will hereinafter appear. The tools mounted upon the ram 52 are indicated generally at A and B and each comprises a base formed of upper and lower sections 80 and 81 respectively, the section 80 being provided with a transverse rib 82 on its lower side engaging in a transverse groove 83 in the upper side of the section 81. The sections 80 and 81 are provided at each end with ears 84 disposed in superimposed relation and passing through each pair of these ears is a bolt 85 having a squared head 86 engaged in a longitudinal groove 87 formed in the upper side of the ram 52. The upper ends of the bolts 85 have engaged thereon nuts through the instrumentality of which the sections 80 and 81 are locked to the ram in any desired longitudinal adjustment with respect to said ram. Each of the tools A and B further includes a cutter carrier 88 provided at one end with a depending ear 89 pivotally mounted in a recess 90 formed in the upper side of the section 80. The pivotal mounting of the cutter carrier 88 is such that when the end of the carrier remote from the ear 89 is seated upon the section 80 the upper side of the carrier will be inclined with respect to both the section 80 and the ram 52.

Formed in the upper side of each carrier 88 is a dove-tailed longitudinal groove 91 in which is engaged a cutter 92 held against longitudinal movement in said groove by means of a wedge bolt 93 extending transversely through the carrier 88. It will be noted that the holders A and B are applied to the ram 52 so as to dispose the ends of the carriers 88 which are pivoted to respective sections 80 in adjacent relation with the upper sides of the carriers of respective holders and the cutters carried by said carriers inclined downwardly toward opposite ends of the ram 52 respectively. By thus disposing the cutters 92 in opposite inclined relation the necessity of grinding said cutters for clearance is entirely obviated and the strength and life of the cutter materially enhanced while at the same time it is easy and convenient to sharpen the cutters while mounted upon the machine. Each of the cutters 92 when mounted in operative position upon the carrier 88 has the cutting end thereof extended beyond the end of the carrier adjacent the ear 89, so that during the non-cutting stroke of the cutter the engagement of the latter with the work will swing the carrier 88 on its pivot and permit free movement of the cutter without injury to either the latter or the work. It will be noted that by this arrangement of cutters one will be pai-taking of its cutting stroke while the other is partaking of its non-cutting stroke so that a cutting operation is effected during each stroke of the ram.

Mounted in the bearing 18 is a rotatable tubular member 94 the bore of which comprises a tapering portion 95 and a cylindrical portion 96. Engaged in the bore of the tubular member 94 is a work arbor 97 which also includes a tapering portion 98 seating in the tapering portion 95 of the bore of the member 94. One end of this arbor 97 extends over the cutters 92 and ram 52 and has formed thereon adjacent the bearing 18 a collar 99 which serves as an abutment for gear blanks 100 mounted upon the arbor and forced against said collar 99 through the medium of a nut 101 threaded on the adjacent end of the arbor. In this manner the gear blanks 100 are non-rotatably supported upon the arbor in position to be operated upon by the cutters 92 during the reciprocation of the ram 52. Loosely mounted on the arbor 97 between the bearing 18 and the collar 99 is a nut 102 threaded in the adjacent end of the member 94 and bearing against the collar 99 at its outer end. The purpose of this nut will be presently referred to. Fixed on the end of the arbor 97 remote from the gear blank 100 is a worm wheel 108 which is held against longitudinal movement on the arbor by means of a nut 1 04 threaded on the adjacent end of the latter. By operating the nut 104 inwardly of the arbor it will be obvious that the latter will be drawn longitudinally and firmly seat the tapered portion 98 thereof in the tapered portion of the bore of the tubular member 94 thereby locking the arbor to said tubular member for rotation with the latter. lf it is desired to diseugage the arbor from the tubular member 94 it is only necessary to lirst remove the nut 104 and then unscrew 4the nut 102, the engagement of said last named nut with the collar 99 serving to effect the necessary longitudinal movement of the arbor to withdraw same from the tubular member 94.

After each stroke of the cutters 92 and ram 52 the arbor 97 is partially rotated so as to present another portion of the gear blanks 100 to be operated upon by a cutter during the next stroke of the ram. The mechanism for accomplishing this rotation of the arbor and gear blanks will be broadly termed the indexing mechanism and comprises a. casing 105 secured against theside of the column 16 adjacent the worm wheel 36 and at a. point above said worm wheel. Rotatably mounted in the ends of the casing 105 is a. shaft 106 which has fixed thereon at one end exteriorly of the casing 105 a gear 107. The other end of this shaft 106 extends a considerable distance beyond the adjacent Y end of the casing 105 and has fixed thereon a worm 108 in mesh with the worm Wheel 103 carried by the arbor 97. Journaled in the bearing in the end of the casing 105 adjacent the gear 107 and in abearing 109 carriedby the casing 105 is a shaft 109 and fixed on the outer end of this shaft is a gear 110 connected to the vgear 107 by an idle gear 111 rotatably mounted on a stub shaft 112 carried by the adjacent end of the casing 105. Rotatably mounted in the end of the casing remote from the gear 110 and in a bracket 113 carried by said casing is a shaft 114 disposed in longitudinal alinement with the shaft 109. This shaft 114 is held against longitudinal movement by means of a collar 115 fixed thereon and interposed between the bearing 113 and the adjacent end of the casing 105. Fixed on the outer end of the shaft 114 exteriorly of the casing 105 is a beveled gear 116 for a purpose that will presently appear. Splined on the inner end of the shaft 114 is a clutch element 117 provided with teeth 118 on the inner end thereof, said teeth being adapted to coperate with teeth 119 formed on the adjacent end of a clutch element 120 fixed on the shaft 1 09 and whereby the shafts 109 and 114 may be locked together for simultaneous rotation. Splined on the shaft 109 for movement longitudinal of said shaft is a drum 121 provided with a hub extension 122 having a circum' ferential groove 123. Pivoted on the front of the casing 105 exteriorly of the casing is a lever 124 provided with a slot 125 and having its free end terminating in a hand grip 126. Formed in the front side of the casing 105 and extending parallel to the shaft 114 is a slot 127 having the lower edge thereof provided with a series of equidistantly spaced recesses 128. Extending through the slot 125 andthe slot 127 is a rod 129 the outer end of which is provided with a head 130 and the inner end with a yoke embodying fingers 131 which are engaged in the groove 1 23 of the hub 122. By elevating the rod 129 out of a recess 128 and then swinging the lever 124 on its pivot it will be apparent that the drum 121 will bemoved longitudinally of the shaft 129.

The periphery of the drum 121 is provided with a plurality of series of recesses 132, 133, 134 and 135, the recesses of each series being disposed in the same-plane extending transversely `through the drum. The number of recesses in each series varies,

there being one recess inthe series 132, two

recesses in the series 133, three recesses in the series 134 and so on. The purposes of these recesses will presently appear.

Mounted on the inner face of the front side of the casing 105 are guide blocks 136 between which is slidably engaged a shot bolt 137. The lower end of this bolt 137 is reduced as at 138 and this reduced end of the bolt is adapted to engage in the recesses on the drum 121 during the operation of the indexing mechanism as willhereinafter appear. The upper end of the shot bolt 137 is reduced as at 139 and slidably engaged through the top of the casing 105. Threaded on the upper end of the shot bolt is a nut 140 which bears against the outer face of the upper side of the casing 105. Surrounding the reduced upper end 139 of the shot bolt is a spring 141 one end of which bears against the top of the casing 105 while the other end thereof bears against the upper end of the major portion of the shot bolt. This spring 141 constantly tends to force the lower end of the shot bolt against the periphery of the drum 121 as will be obvious. Pivotally supported from the rear side of the casing 105 is a two armed lever 142 one end of which passes through an opening 143 in the end of the casing 105 adjacent the beveled gear 116 and has journaled thereon a roller 144, while the other end of said lever is forked as at 145 and receives a pin 146 projecting from the shot bolt 137 and whereby sliding movement of the shot bolt will produce pivotal movement of the lever 142. Depending from the lever 142 is an arm 147 which terminates in a forked portion the arms 147 of which are engaged around the clutch member 117 and in a groove 148 formed in said clutch member. By this construction it will be apparent that pivotal movement of the lever 142 will serve to connect and disconnect` the shaft 114 to and from the shaft 109.

Projecting from the end of the casing 105 on opposite sides of the opening 143 respectively are brackets 149 and journaled in these brackets at right angles to the shafts 106 and 114 is a shaft 150. Fixed on this shaft 150 is a worm wheel 151 and also fixed upon the shaft 150 above the roller 144 is a cam 152 which is adapted to coperate with ythe roller 144 upon each complete revolution of the shaft 150 to depress the adjacent end of the lever 142 and connect the clutch elements 117 and 120. Mounted on the upper end of the column 16 is a bearing 153 which alines with bearings 154 and 155 on the carriage 20'and also with a bearing 156 on the base 15. Rotatably mounted in the bearings 153, 154, 155 and 1,56 is a shaft 157 which has fixed on the upper end thereof a step pulley 158 adapted for connection through the medium of a belt with a step pulley 159 fixed on the upper end of the the shaft 157 is a worm 161 which meshes with the worm wheel 151 carried by the shaft 150. Also ixed on theshaft 157 just beneath the worm 161 is a beveled gear 162 which meshes with the beveled gear 116 for the purpose of imparting rota-tion to the shaft 114 through the medium of rotation of the shaft 157.

During the operation of the machine it will be apparent that the shafts and 157 are constantly rotated and that the rotation of the shaft 70 will be imparted to the shaft 66 through the medium of the gears 68 and 69. This rotation of the shaft 66 will in turn rotate the ear 55 through the medium of the pinion 6 As a result of the rotation of the gear 55 the ram 52 and the cutters 92 carried thereby will be reciprocated beneath the gear blanks 100. The rotation of the shaft 157 will, through the medium of the worm 160 and the worm wheel 36, rotate the shaft 34 and the cam 35 and this cam coperating with the roller 38 will elevate the sub-carriage 21, ram retainer 39, ram 52 and cutters 92 twice during each rotation of the shaft 34 to a-position to dispose the cutters 92 in cutting position with respect to the blanks 100, the complete elevation of the parts referred to occurring just before the active cutter 92 moves into engagement with the work. As soon as a given cutter has completed its cutting stroke lowering of the parts is permitted by the cam 35 so as to allow of the operation of the indexing mechanism for the purpose of turning the work to present a new surface to be cut. The extent of the elevation of the cutters 92, or rather the cutting position thereof is of course effected by rotating the elevating screws 22 and 23 through the medium of the crank 30 as has been hereinabove referred to. The rotation of the shaft 157 will also rotate the shaft 114 through the medium of beveled gears 162 and 116, and also the shaft 150 through the medium of the worm 161 and the worm wheel 151. The connections between the shaft 157 and shaft 150 are so timed that when a given cutter 92 has completed its cutting stroke the cam 152 will engage the roller 144 and depress the adjacent end of the lever 142 thus raising the lower end 138 of the shot bolt out of one of the recesses 134 and at the same time connecting the clutch members 117 and 120. The shaft 109 and the drum 121 will then rotate until the next recess 134 is positioned to receive the lower end of the shot bolt, at which-time the cam 152 is out of engagement with the roller 144 so that the spring 141 is free to act and force the lower end of the shot bolt into the recess. This movement of the shot bolt will of course disengage the clutch members 117 and 120 and terminate the rotation of the shaft 109. This operation is repeated during each complete revolution of the shaft 150. During the operation of the shaft 109 it will be obvious that the shaft 106 will be rotated through the medium of the gears 110, 111 and 107. The rotation of the shaft 106 will rotate the arbor 98 through the me-V dium of the worm 108 and worm wheel 103 and this rotation of the arbor will rotate the blanks 100 to present another portion of said blanks to be subjected to the next cutting stroke of the cutters 92. The various parts of the machine are so timed that the operations heretofore referred to will be performed in proper sequence.

If it is desired to shape cams it is only necessary to screw the nut 140 on the shot bolt 139 and thus raise the lower end of the shot bolt out of recess in the drum 121 and lock the shafts 114 and 109 together so that the arbor 98 and the work carried thereby will turn continuously. Tf it is desired to cut beveled gears it is only necessary to adjust the ram retainer 39 at an angle to the sub-carriage 21 in a manner previously referred to.

The amount of rotation imparted to the blanks 100 can of course be varied by adjusting the drum 121 to bring desired series of recesses into operative relation to the shot bolt.

What is claimed is:-

1. In a gear cutting machinefa vertically slidable carriage, a second carriage slidably mounted in relation to the carriage and supported by the latter, a cutting tool support mounted to reciprocate upon said second carriage, means for adjusting the carriage to different elevations, and a rotatable member journaled upon said carriage coperating with said secondcarriage for translating said carriage in alternate directions.

2. In a gear cutting machine, the combination of a vertically slidable carriage, a sub-carriage slidably mounted above the carriage and supported by the latter, means for adjusting the carriage to different elevations, a rotatable shaft carried by the carriage, a cam lixedon said shaft, a roller journaled on the sub-carriage and engaging said cam whereby the rotation of the latter will intermittently raise the sub-carriage a predetermined distance, a cutting device mounted for reciprocation on the sub-carriage, means for reciprocating said cutting device when the subecarriage is elevated, a work arbor, and means for rotating said work arbor after each stroke of the cutting device to dispose another portion of the work in position to be operated upon by the cutting device on its next stroke.

3. In a gear cutting machine, a Work supporting arbor, a vertically slidable carriage translatable to adjust the same to different elevations, a second carriage slidable in relation to the carriage, and a rotatable cam member journaled upon said carriage Cooperating with said second carriage to move the latter toward the arbor and controlling said second carriage moving under the influence of gravity in a reverse motion.

4. In a machine of the class described, a vertically slidable carriage translatable to adjust the same to diierent elevations, a rotatable cam member journaled upon said Carriage, a second carriage slidable in rela- 15 in an alternate direction controllably by said 20 cam member.

In testimony whereof, I afiix my signature, 1n the presence of tivo Witnesses.

GEGRGE A. SCHIPPER.

Witnesses:

IVILLARD M. DEAN, JESSE L. MoELRoY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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