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Publication numberUS3241656 A
Publication typeGrant
Publication dateMar 22, 1966
Filing dateApr 9, 1964
Priority dateApr 9, 1964
Publication numberUS 3241656 A, US 3241656A, US-A-3241656, US3241656 A, US3241656A
InventorsThornton Harry E
Original AssigneeBound Brook Bearing Corp Of Am
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Dial feed for presses
US 3241656 A
Abstract  available in
Images(5)
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Claims  available in
Description  (OCR text may contain errors)

March 22, 1966 H. E. THORNTON DIAL FEED FOR PRESSES 5 Sheets-Sheet 1 Filed April 9, 19 4 N 0 W N w m 5 4 L v, E E c w!" x w I 1 l w 13 13 Q mm NM NM 5 Q ww ffi fi 1: x vi 1 Q\\\| w 5 Sheets-Sheet 2 Filed April 9, 1964 INVENTOR. //A r5 i/a/eA/ro/v March 22, 1966 H. E. THORNTON 3,241,656

DIAL FEED FOR PRESSES Filed April 9, 1964 5 Sheets-Sheet 3 J L I L I 3 I 1 l I I I /W .47" oeA/E/ March 22, 1966 H. E. THORNTON 3,241,656

DIAL FEED FOR PRESSES Filed April 9, 1964 5 Sheets-Sheet 4 T .1 E M a;

\ I g6 4J\ H" W I I" j j L I NVENTOR.

March 22, 1966 H. E. THORNTON I 3,241,656

DIAL FEED FOR PRESSES Filed April 9, 1964 5 Sheets-Sheet 5 BY I United States Patent 3,241,656 DIAL FEED FOR PRESSES Harry E. Thornton, Plainfield, N.J., assignor to Bound Brook Bearing Corporation of America, Middlesex, N.J., a corporation of Delaware Filed Apr. 9, 1964, Ser. No. 358,536 9 Claims. (Cl. 198209) This invention relates to feed mechanism for presses.

More particularly, the invention relates to mechanism for feeding metal components, particularly irregularly shaped, sintered, powdered metal, structural parts into a sizing die for cold coining and the subsequent transfer of the sized parts to a discharge point. In its broad aspect, the invention comprises a press feeding mechanism providing a feed disk or dial having a plurality of workpiece sockets spaced about its periphery, said disk or dial having means for intermittently rotating the same to bring each of said sockets successively into a work zone where the feed disk or dial is latched againstrotation as the press operates on the workpieces, and press controlled means for releasing the latching mechanism between press strokes.

In its more particular aspects, the invention provides a workpiece feeding disk or dial having a plurality of workpiece sockets spaced around its periphery, the disk or dial being adapted to carry workpieces from a loading station to a work station where a sizing or coining operation is performed on the workpieces, and from thence to a discharge station. The feeding disk or dial is connected to indexing means for rotating the feed disk or dial between press strokes and for positively latching it against rotation when the workpiece sockets are rotated into the work zone. In a specific embodiment, an electromagnetic release has been provided for the indexing mechanism in combination with a press control system which prevents the press from operating whenever the feed disk is released for rotation.

It is a specific object of the invention to provide a feeding adjunct for a sizing or coining press which adjunct is adapted to receive a succession of components at a point remote from a press work zone into which the components are delivered and at which the components are processed by the press, and which then delivers the processed components from the work zone to a discharge point which is also remote from the work zone.

It is still a further object of the invention to provide a very simple press feeding mechanism which employs interchangeable workpiece feeding dials, whereby workpieces of a great variety of shapes and forms may be processed in a completely safe and expeditious manner.

These and further objects and advantages of the invention will become apparent from a reading of the following description which is illuminated by the drawings, in which drawings like reference numerals indicate like parts, and in which:

FIG. 1 is a side elevational view of a dial feed drive mechanism, taken on line 1--1 of FIG. 2;

FIG, 2 is a plan view of the mechanism, taken on line 22, of FIG. 1;

FIG. 3 is a fragmentary side elevational view showing certain of the control mechanism, parts being shown in section and other parts in full line, and being taken on line 3-3 of FIG. 2;

FIG. 4 is an end elevational view of an indexing control pawl and ratchet mechanism, taken on line 4-4, of FIG. 3;

FIG. 5 is a plan view of the mechanism of FIG. 4, taken on line 5-5 of FIG. 3;

FIG. 6 is a cross-sectional view through a planetary drive mechanism;

3,241,656 Patented Mar. 22, 1966 FIGS. 7 and 8 comprise plan views of dial feed plates on a reduced scale; and

FIG. 9 is a diagrammatic representation of the control circuit.

Typical dial feed plates 10 and 12 are shown in FIGS. 7 and 8. These plates are adapted to overlie the bed of a sizing or coining press. The plates 10 and 12 are removably attached to a drive shaft 14 by means of machine screws 16. The drive shaft 14 extends upwardly through the bed plate of the press and it is connected to driving and control mechanism located beneath the bed plate of the press. The latter driving and control apparatus is designed to rotate the dial feed plate in step-by-step progression from a workpiece loading point to a work zone and then to a discharge point, thus avoiding the necessity for the press operator to feed workpieces directly into a die cavity in the vicinity of the press ram.

The dial feed mechanism is particularly useful for the feeding of irregularly and oddly shaped workpieces. Adapting each plate to feed workpieces of a particular configuration are a plurality of spaced sockets 18, conformed to the shape of the workpieces, formed at regular intervals about its periphery. Thus, the workpiece can be fed by hand into the sockets at a loading station which is remote from the work zone. As it is then intermittently stepped, the dial feed plate will carry the workpiece to the work zone where a coining or pressing operation is performed upon the workpieces by the descending press ram. Thereafter, as the dial feed plate continues to rotate between each of the press strokes, the processed workpiece will be carried away from the work zone for discharge adjacent the work loading station. The dial feed plates Ill and 12, which differ from each other only in the size and shape of the sockets 18, are representative of "an entire series of such plates which may be easily produced for the feeding of a great variety of differentially shaped workpieces.

A dial feed plate, such as the plate 10 or plate 12, as stated, is driven and controlled through a planetary gear assembly 20, a speed reducer 22 and a motor 24. The motor 24, in a practical installation now in operation, is a 1750 rpm. three-quarter horsepower motor. The output shaft 26 of the motor is coupled to the input shaft 28 of the speed reducer, the latter in the practical installation above mentioned is a Boston Gear Company VA-lO speed reducer having a 9.75:1 ratio. The coupling between the motor shaft 26 and the input shaft of the speed reducer is preferably a flexible coupling 30, as shown in FIG. 2.

The output shaft 32 (FIG. 6) of the speed reducer 22 has rotatably mounted thereon a planetary gear housing 34. The housing is an upwardly opening dished structure adapted to receive and generally enclose a planetary gear system. The housing 34 is supported on the reducer shaft 32 by means of anti-friction bearings 36 disposed within an enlarged hub 38 of the housing. A hearing cap 40, spacers 42 and 44 and a sealing ring 46 complete the mounting structure for the housing.

Within the housing 34 is an annular ring gear 48 seated on andfixed to a shoulder 50 at an open face of the housing. Fixed to the shaft 32 of the speed reducer for rotation therewith is a sun gear 52. Interposed between the ring gear 48 and the sun gear are a pair of planet gears 54 and 56; the assembly of gears thereby constituting a planetary gear arrangement.

The sun gears 54 and 56 are carried by an index plate 58. The index plate 58 overlies the open face of the gear housing 34 and supports the sun gears 54 and 56 from the lower face thereof by means of stud bearings 60 and 62, respectively. The dial feed plate drive shaft 14 is fixed to the upper face of the indexing plate 58 by means'of suitable machine screws 64 and consequently ice this shaft rotates with the plate when the latter is rotated by the planetary gear assembly.

Ordinarily the gear housing 34 will be freely rotated about the reducer shaft 32 by way of the sun gear 52 and the planet gears 54 and 56. Under these conditions the index plate 58 can be held against rotation such that no output power is delivered to the shaft 14. If, however, the gear housing 34 is held against rotation and the index plate 58 is free to turn, the reducer output shaft 32 will drive the index plate 58 and consequently the shaft 14 will be driven in rotation.

The index plate 58, as best shown in FIG. 2, has equally spaced notches 66 formed in its peripheral edge. The edge of the index plate 58 between adjacent notches is on a curvature which provides a cam surface cooperating generally with an index pawl 68. When the index pawl 68 is engaged with any one of the notches 66, the pawl serves to hold the plate 58 and consequently the shaft 14 against rotation. The rotational position of the dial feed plates 10 and 12 in respect to the several locating notches 66 of the index plate 58 when either mounted on the upper end of the shaft 14 is so adjusted that whenever the index pawl 68 is seated in a notch 66 of the index plate, a work holding socket 18 of the dial feed plate will be in the work zone of the press to receive the impact of the press ram.

The invention provides mechanism for releasing the index plate 58 from the holding elfect of the index pawl 68 and for thereafter holding the gear housing 34 against rotation such that the index plate and the dial feed plate shaft 14 connected thereto are driven. The first of these functions is performed by an index plate release assembly 70, as best shown in FIGS. 4 and 5, and the second of these functions is performed by a brake device 72, disclosed in FIGS. 1, 2 and 3.

The index plate release assembly 70 (FIG. consists essentially of the index pawl 68, a ratchet 74 cooperating therewith and a rotary solenoid 76 for driving the ratchet 74. The rotary solenoid 76 is fixed to a stationary frame member 78 such that the index pawl 68 is in horizontal alignment with the edge of the index plate 58. The index pawl 68, as shown in FIG. 4, has a cross-sectional configuration of an inverted, truncatedcone. It is adapted to reciprocate in a correspondingly shaped, fixed guideway 80. The outer end of the index pawl is supported by a fixed strap 82 which has an apertured downwardly extending leg 84 through which the pawl extends.

The pawl 68 is ordinarily urged inwardly, i.e., its inner end is pressed into contact with the periphery of the index plate 58 by means of a spring 86 interposed between a shoulder on the pawl and the inner face of the leg 86. Extending downwardly from the bottom face of the index pawl 68 is a lug 88 which is adapted to engage the peripheral edge of the racthet 74 which has formed in its periphery a plurality of equally spaced oblong ratchet teeth 90. If the ratchet 74 is rotated in a counterclockwise direction when the lug 88 is engaged with the teeth of the ratchet, as viewed in FIG. 5, the index pawl 68 will be projected to the right in that figure against the tension of the spring 86. When so projected, the inner end 92 of the index pawl will be withdrawn from the index plate notch 66 with which it is engaged suc that the index plate 58 is free to rotate.

The index pawl 68 is operated to release the index plate 58 by the rotary solenoid 76 which has a plurality of clutching teeth 94 formed in the free end of its core. These teeth are adapted to engage a corresponding set of teeth 96 formed in one end of a ratchet shaft 98. The teeth 94 and 96 are normally separated from each other. However, when the solenoid 76 is energized, its core 100 will be projected and rotated simultaneously to first engage the teeth 94 and 96 and then rotate the ratchet shaft 98. From the foregoing it can be seen that when the rotary solenoid 76 is energized projection and rotation of its core will rotate the ratchet 74 and will cause the ratchet to project the pawl 68 to the right by reason of engagement between the ratchet and the lug 88 on the index pawl. The index plate 58 is thus released and can now be rotated.

The ratchet shaft 98 is supported for rotation in a porous bronze bearing 102 which is surrounded by a lubricating gland 104 to which a lubricant is admitted from an oil cup 106. The ratchet 74 is, of course, connected to the upper free end of the ratchet shaft 98.

In order to hold the gear housing 34 against rotation, there is provided herein a braking mechanism, as stated. By reference to FIGS. 1, 2 and 3, it will be seen that the annular vertical outer face of the gear housing 34 is surrounded by a brake band 108. This and is supported relative to the gear housing 34 by m ans f a fixed supporting lug and a fixed rod 112. The lug 110 extends outwardly from the supporting frame 113 and it is apertured to receive a stud 114 fixed to and extending outwardly from the brake band 158. A coil spring 116 is disposed between the inner face of the lug 110 and the outer face of the brake band 108 and bears thereon with sufiicient force to urge the brake band in the direction of the gear housing 34.

The mechanism by which the brake band 108 is brought into braking engagement with the gear housing 34, includes the supporting rod 112 and its associated mechanism. The brake band 108 is in the form of an annular split band having a pair of apertured ears 118 and 120 (FIG. 2) through which the supporting rod 112 passes. The supporting rod 112 also passes through a pair of apertured upstanding mounting lugs 122 and 124 which comprise fixed parts of the frame structure.

The brake band 108 is normally biased into open posi tion by means of a coil spring 126 seated about the sup porting rod 112 and located between the brake band ears 118 and 120. When the spring 126 is effective on the brake band, it will hold the band away from the gear housing 34 a sufiicient distance to let the gear housing rotate freely.

The ear 120 of the brake band normally bears against a fixed abutment 128, while the opposite car 118 is engaged by an operating lever 130. The side of the operating lever 130 remote from the brake band ear 118 has an angular camming surface 132 engaging a complementary camming surface 134 formed in one end of a fixed nut 136. Thus, when the operating lever 130 is actuated by pulling it downwardly, as viewed in FIG. 1, the camming surfaces 132 and 134 will coact with the result that the lever 130 will force the brake band ear 118 toward its complement 120 and thereby tighten the brake band against the outer wall of the gear housing 34. Under these conditions, the gear housing 34 will be held stationary and rotation, instead, will be imparted to the index plate 58 and the output shaft 14 fixed thereto and extending therefrom.

The brake operating shaft 130 is yieldingly connected to a link 138. This connection is effected by a coil spring which is disposed between the operating lever 130 and a nut 142 at the upper end of the link 138. The link 138 is pivoted to a core 144 of a solenoid 146 by means of a pivot pin 148. Thus, when the solenoid 146 is energized and attracts its core 144, the link 138 will be drawn downwardly, as viewed in FIG. 1. This will serve to swing the lever 130 about the axis of the supporting rod 112 and thereby contract the brake band 108 against the wall of the gear housing 34, thereby holding the housing against rotation.

It has been stated hereinabove that the movement of the several parts of the dial feed mechanism must be so synchronized with each other and with the operation of the press ram so as to assure the proper registration of the workpiece in the work zone for receiving the impact of the press ram and for the purpose of avoiding malfunction of the equipment. This synchronous operation is brought.

about by a simple control circuit, such as shown in FIG. 9. In this figure, the press crank shaft 150 has a cam 152 fixed thereto. A normally open microswitch 154 is so located and associated with the cam 152 that the microswitch 154 is closed by the cam 152 at the top of the press stroke. The several components of the control circuit are connected across 220-volt power lines 156 and 158.

The rotary solenoid 76 is fed 90 volts direct current by means of a rectifier 160. The rotary solenoid 76 will,

therefore, be energized at the top of the press stroke when the cam 152 closes the microswitch 154. When this condition is present, the index pawl 68 will be withdrawn from contact with the index plate '58, as above explained.

The outer end of the index pawl 68 (FIG. 2) has associated therewith a pair of microswitches 162 and 164 which are transferred when the index pawl 68 is reciprocated (see also FIG. 9). The microswitch 162 is normally open and the microswitch 164 is normally closed. In the context of this description, the term normally is taken to mean the position of the elements when the in.- dex pawl 68 is fully engaged with the index plate 58.

It can be seen that the planetary brake actuating solenoid 146 (FIG. 9) should be deenergized by opening of the microswitch 162 when the index plate 58 is held against rotation. By the same token, it can be seen that the solenoid operated valve 166 should block passage of air to a press control cylinder 170 when the index plate 58 is free to revolve. As seen in FIG. 9, closure of the microswitch 162 as the index pawl 68 (FIG. 2) moves to the right to disengage the index plate 58 will close the microswitch 162 and will thus energize the brake operating solenoid 146. When the brake operating solenoid 146 is energized, it will hold the planetary gear housing 34 against rotation and cause rotation of the indexing plate 58 and its associated output shaft 14.

When the index plate 58 moves a distance of one station, i.e., the distance between the center of adjacent workpiece sockets (FIGS. 7 and 8), the end 92 of the index pawl 68 will drop into the next indexing notch 66. As this action takes place, the index pawl 68, upon inward movement into engagement with the index plate 58, will permit the microswitch 162 to open. Since the opening of the microswitch 162 now breaks the circuit to the planetary brake solenoid 146, the brake solenoid 146 will release the planetary breaking mechanism with the result that the output torque of the planetary gear system via the index plate 58 and the output shaft 14 is reduced to zero.

When the index pawl 68 moves out of contact with the index plate 58, i.e., to the right in FIG. 2, the microswitch 164, normally closed, will open thereby opening the circuit to the solenoid valve 166. This will prevent operation of the press control air cylinder 170. Thus, a safeguard is provided against inadvertent operation of the press while the index plate 58 is free to rotate. However, with the index pawl 68 in its full in position in contact with the index plate 58, the microswitch 164 will close to operate the solenoid operated valve 166 to allow a supply of compressed air to flow by way of a foot-operated valve 168 to the press control air cylinder 170 which is of conventional structure and which is connected in a conventional fashion to the press clutch. This portion of the circuit, therefore, provides an interlock to prevent tripping of the press when the feed dial is not properly registered in the work zone.

From the foregoing, it can be seen that a very simple, yet effective and safe, feed device has been provided for the successive feeding of workpieces of irregular shape and form to the work zone of sizing and coining presses. The invention has been described in conjunction with a single physical embodiment of which the component parts have equivalent counterparts readily interchangeable with the illustrative components adopted for the explanation of the invention. It is contemplated, therefore, that the claims will circumscribe the scope of the invention and that the specific illustration and description have as their purpose the disclosure of a practical embodiment.

What is claimed is:

1. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work zone, electromagnetic means for releasing said latching 'means between press strokes, a normally open energizing circuit for said electromagnetic means, and press controlled means for periodically closing said energizing circuit.

2. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, indexing means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work zone, press controlled means for releasing said latching means between press strokes, and means under control of said latching means when the same is in release position for indexing said feed disk.

3. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, indexing means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work Zone, press controlled means for releasing said latching means between press strokes, and electromagnetic means under control of said latching means when the same is in release position for indexing said feed disk.

4. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, indexing means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work zone, electromagnetic means for releasing said latching means between press strokes, electromagnetic means under control of said latching means when the same is in release position for indexing said feed disk, a normally open energizing circuit for said first named electromagnetic means, and press controlled means for periodically closing said energizing circuit.

5. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work zone, press controlled means for releasing said latching means between press strokes, press control means, and means effective to disable said press control means whenever said feed disk is released for rotation by said latching means.

6. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work Zone, electromagnetic means for releasing said latching means between press strokes, press control means, means effective to disable said press control means whenever said feed disk is released for rotation by said latching means, a normally open energizing circuit for said electromagnetic means, and press controlled means for periodically closing said energizing circuit.

7. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, indexing means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work zone, press controlled means for releasing said latching means between press strokes, press control means, means effective to disable said press control means whenever said feed disk is released for rotation by said latching means, and means under control of said latching means when the same is in release position for indexing said feed disk.

8. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, indexing means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work zone, press controlled means for releasing said latching means between press strokes, press control means, means elfective to disable said press control means whenever said feed disk is released for rotation by said latching means, and electromagnetic means under control of said latching means when the same is in release position for indexing said feed disk.

9. A press feeding mechanism comprising a feed disk having a plurality of workpiece sockets spaced about its periphery, indexing means for intermittently rotating said feed disk to bring said sockets successively into registration with a work zone, means for positively latching said disk against rotation when said sockets are rotated into said work zone, electromagnetic means for releasing said latching means between press strokes, press control means, means etfective to disable said press control means whenever said feed disk is released for rotation by said latching means, electromagnetic means under control of said latching means when the same is in release position for indexing said feed disk, a normally open energizing circuit for said first named electromagnetic means, and press controlled means for periodically closing said energizing circuit.

References Cited by the Examiner UNITED STATES PATENTS 11/1933 Kylin 74823 1/ 1965 Hediger 74822

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1934358 *Mar 31, 1932Nov 7, 1933John G OliverAutomatic turret clamp
US3166955 *Mar 19, 1962Jan 26, 1965Gleason WorksIndex mechanism
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3326145 *May 28, 1965Jun 20, 1967Austin Leonard HFeed frame
US4721017 *Jul 14, 1986Jan 26, 1988Snow Manufacturing CompanyIndexing table
US5226778 *Oct 30, 1992Jul 13, 1993Murata Kikai Kabushiki KaishaYarn supply device for automatic winder
US6164437 *Mar 17, 1999Dec 26, 2000Unova Ip Corp.Indexing drive
US6513649 *Jan 23, 2001Feb 4, 2003J. Nelson LauzonIndexing drive slat conveyor system
WO2009121411A1 *Apr 3, 2008Oct 8, 2009Martin HagelRotating table for notching machines
Classifications
U.S. Classification198/345.2, 74/822, 65/312, 198/832.1
International ClassificationB21D43/14, B21D43/04
Cooperative ClassificationB21D43/14
European ClassificationB21D43/14