US1113406A

US1113406A - Feed mechanism for heading-machines.

Info

Publication number: US1113406A
Application number: US81538014A
Authority: US
Inventors: Charles T Brennan
Original assignee: MANVILLE E J MACHINE CO
Current assignee: E J MANVILLE MACHINE Co; MANVILLE E J MACHINE CO
Priority date: 1914-01-30
Filing date: 1914-01-30
Publication date: 1914-10-13
Anticipated expiration: 1931-10-13

Description

G. T. BRENNAN.

FEED MECHANISM FOR HEADING MACHINES. APPLICATION FILED JAN. 30, 1914.

1 .1 1 3,406 Patented Oct. 13, 1914.

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G. T. BRENNAN.

FEED MECHANISM FOR HEADING MACHINES.

APPLIGATION FILED JAN. 30, 1914 Patented Oct. 13, 1914.

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THE NORRIS PETERS CO" PHOTO-LITHO.. WASHINGTON, D C

APPLICATION FILED JAN. 30. 1914.

Patented Oct. 13, 1914.

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c. T. BRENNAN.

FEED MECHANISM FOR HEADING MACHINES.

AYPLICATION FILED JAN. 30, 1914;

1,1 1 3,406. Patented Oct. 13, 1914.

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C. T. BRENNAN. FEED MECHANISM FOR HEA'DING MACHINES.

APPLICATION TILED JAN. 30, 1914.

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UNITED STATES PATENT OFFICE.

CHARLES 'r. BRENNAN, or wn rnnnuar, CONNECTICUT, ASSIGNOR TO THE E. J. MAN VILLE MACHINE ooMrANY, or WATERBURY, CONNECTICUT, A CORPORATION or CONNECTICUT.

FEED MECHANISM FOR HEADING-MAGHINES.

Specification of Letters Patent.

Patented 0015.13, 1914.

Application filed January 30, 1914. Serial No. 815,380.

I Feed Mechanism for Heading-Machines, of

rotatory movement by means of a ratchet and pawl mechanism which is actuated from the crank shaft which reciprocates the punch carrying gate. As the crank makes two revolutions during each cycle of the machine, for the purpose of giving two blows to the stock after each feed, the ratchet and pawl mechanism is rendered inoperative every other revolution of the crank shaft by means of properly designed connections from a cam. This drive is satisfactory where the stock is of considerable length, but with short lengths of stock, such for instance as bolt blanks eke, even with a plural number of pawls that successively engage the ratchet teeth, as the teeth to be of suflicient strength must be of considerable size and be of definite length, the adjustment cannot be made fine enough to give a sufficiently accurate feed, and as a result the bolt heads are frequently imperfectly formed, the dies are damaged and other parts of the machine injured.

The object of this invention is to provide a mechanism which can be adjusted so as to feed the stock surely and accurately the exact required distance to efiect the result sought, whereby a multiple number of short lengths of rod or wire of considerable size can be fed into the dies of a double-stroke open-die cold bolt-heading machine and be subjected to the desired operations without danger of damaging the dies or injury to other parts of the machine.

Only so much of a heading .machine is shown in the accompanying drawings, as is necessary to illustrateithe feed mechanism which embodies this invention. 7

Figure l showsa face view of the feed mechanism. Fig.2 shows a side elevation ofthe same.

on Fig. 4:. Fig. a is a view looking at the face of the parts shown in Fig. 3, the clutch members being engaged. Fig. 5 shows a section through a portion ofthe clutch drum and one of the clutch blocks, on the plane indicated by the dotted line 5-5 on Fig. 4, the parts being engaged. Fig. 6 is a View similar to that shown in Fig. 4 with the clutch members disengaged. Fig. 7 is asectime through the clutch drum and one of the clutch blocks on the plane indicated by the dotted line 77 on Fig. 6, the parts being disengaged. Fig. 8 is a section on the plane indicated by the dotted line 8-8 on Fig. 2.

The feed roll shaft 1 has keyed or otherwise fastened toit the gear 2 for driving the other feed roll shaft, alsothe drum 3 Which forms one member of the ratchet friction clutch which is employed to impart the feeding motion to the feed roll shafts. This druinin the interior of its peripheral wall Fig. 3 is a vertical sectionon the plane indicated by the dotted line 33 may have threads 4 for increasing the fricthe drum. Turning loosely on the hub 6 is a ring 7, between which and thesegmental blocks aretoggle links 8. When the ring 7 i i is turned one way the toggle links are straightened so as to force the blocks with great force outward against the wall of the drum and cause the drum and the parts connected with it to be given a rotary movement. (Fig. 4). When the ring is turned in the other direction, the toggle links are moved so as to withdraw the blocks and cause them to release their hold on the drum. (Fig. 6). Between the clutch blocks are angular pieces 9 which project fromthe inner face of the ring 10 for the purpose of guiding the clutch blocks in their movement in and out. The toggle ring 7 forms part of a box 11, beingfastened by screws or other means to the back thereof, and the box being freeto oscillate'on the end of the roll shaft. The swinging of this box in one direction turns the ring '7 so as to straighten the toggle links and cause the chuck blocks to bite the walls of the drum and by this frictional engagement of the clutch parts to impart rotatory movement to the feed roll shaft. The swinging of the box in the opposite direction turns the ring 7 and loosens the toggle links so that the blocks immediately release their hold.

A spring 12 (Fig. '1) which connects a pin 13 on the upper end of the box with a pin 141- on the ring 10, normally holds the ring 10 and the guide blocks which are attached to it in such position that the clutch blocks move out and in for clutching and releasing the members. The box is 08- cillated by the bar 15 which is adapted to be connected with the gate crank shaft of the machine, and as stated, is reciprocated thereby twice during each cycle of the machine. The end of the bar 15 is hinged to a block 16 that is adapted to move up and down in an opening in the box. Movement in and out can be imparted to this block by a screw 17 which is provided with a worm wheel 18 thatmeshes with a worm 19 on the spindle 20 that is supported by the box and that on the outside has a hand wheel 21. By turning this hand wheel, through the worm, worm wheel-and screw, the distance between the axis of the box and the point of pivotal connection of the end of the bar 15 with the box can be very finely adjusted at any time, even when the machine is in motion. This enables the parts to be adjusted at any time so as to give a very accurate feed.

As stated, the bar 15 gives the box two oscillations to each cycle of the machine, and as but one feed is required for each cycle it is necessary that every other oscillation of the box be rendered ineffective, that is, on every other oscillation the blocks must fail to engage with the drum. To accomplish this the ring--10 which carries the guide blocks 9 is periodically turned around against the tension of the spring'12 so as to locate the blocks 5 in such positions that when the toggle links are straightened by the ring 7 they will not straighten sufliciently far to force the blocks into contact with the wall of the drum. These positions are shown in Fig. 6. To effect this a rocker 22 is mounted on a stud projecting from the upper end of the box. The foot 23 of this rocker is adapted to engage with a roll 24 on a stud projecting from the ring 10 which carries the guide blocks, and move the ring to the right. The other end of the rocker has a roll 25 that is held on the upper surface of the arm 26 by a spring 27 that is coiled about its hub. This arm is fastened to a shaft 28 which has a rocker arm 29 that is connected with a bar 30. This bar is adapted to be reciprocated by a suitably formed cam so that during every alternate oscillation of the box the arm 26 is lifted. hen this arm is lifted the rocker 22 is turned into engagement with the roll 24 on the ring 10 and during that oscillation of the box this holds the ring 10 with the guide blocks so that the friction blocks cannot be moved out far enough to engage with the walls of the drum. In order that the machine may be run without causing the feed mechanism to operate, the rocker 22 is arranged so that it may be thrown way over to a position where it will hold the roll 24 and guide ring 10, as shown in Fig. 6. When the rocker holds the parts in this manner the machine can be run without causing the feed rolls to feed stock.

The mechanism illustrated and described can be adjusted whether the machine'is run- ;ning or is inoperative, so closely that the stock will be fed very accurately. This enables the machine to operate on very short pieces of stock, so short in fact that a number of pieces are heldin the dies at all times, and yet these pieces can be fed without the provision of a stop or gage for determining the exact amount of feed. The feed is quick and positive for the feed motion is given by mechanism which makes two revolutions to each cycle of the machine, and yet the feed is given to the stock only once during each cycle of the machine. The distance of the feed is not dependent upon the fixed lengths of ratchet teeth. Ratchet teeth if made fine have not sufficient strength and break off during the operation of machines for which this mechanism is provided, and even if relatively small the feed must be a fixed distance, either the length of a ratchet tooth or a multiple of that length. lVith the mechanism shown the friction is so great and the grip is so powerful and quick in operation that the frictional form of ratchet clutch shown will operate successfully for short feeds even with large stock.

The invention claimed is:

1. A feed mechanism for a heading machine consisting of a drum with an interior friction wall, friction blocks movable radially and circumferentlally in said drum,

an oscillatory box, links connecting said box and the friction blocks for moving the latter radially, guide blocks arranged between the ends of the friction blocks, and means for changing the circumferential positions of the guide blocks and friction blocks with relation to the oscillatory box.

2. A. feed mechanism for a heading machine consisting of a shaft, a drum attached to the shaft, a box mounted on the shaft, means for oscillating the box, a ring attached to the box, blocks movable radially in the drum, and toggle links between the ring and the blocks and adapted when the ring moves inone direction to force the blocks outward, and when the ring moves in the opposite direction to allow the blocks to move inward.

3. A feed mechanism for a heading machine consisting of a shaft, a drum fixed on the shaft, a box loose on the shaft, means for oscillating the box, a ring attached to the box, friction blocks movable radially in the drum, toggle links between the ring and the blocks, and guiding blocks between the ends of the friction blocks.

4. A feed mechanism for a heading machine consisting of a shaft, a drum fixed on the shaft, a box loose on the shaft, means for oscillating the box, a ring attached'to the box, friction blocks movable radially in the drum, toggle links between the ring and the blocks, guide blocks between the ends of the friction blocks, and means for moving the guide blocks and causing them to shift the friction blocks into and out of operative positions.

5. A feed mechanism for a heading machine consisting of a shaft, a drum fixed to the shaft, a box loose on the shaft, means for oscillating the box, a ring attached to the box, friction blocks movable in the drum, toggle links between the ring and the friction blocks, and means for shifting the friction blocks into and out of operative positions.

6. A feed mechanism for a heading machine consisting of a shaft, a drum fixed to the shaft, a box loose on the shaft, means for oscillating the box, friction blocks movable inthe drum, toggle links connected with the box for moving the friction blocks in and out, and means for varying the annular relations of the box and the blocks whereby the friction blocks may periodically be rendered inoperative.

7. A feed mechanism for a heading ma chine having a shaft, a drum fixed to the shaft, a box loose on the shaft, means for oscillating the box, friction blocks located in the drum, toggle links connected between the box and the friction blocks, guide blocks between the ends of the friction blocks, a ring connecting said guide blocks, and means for changing the annular positions of the said ring and guide blocks.

8. A feed mechanism for a heading machine having a shaft, a drum fixed to the shaft, a box loose on the shaft, means for oscillating the box, a ring attached to the box, friction blocks within the drum, toggle links between the ring and the friction blocks, guide blocks between the ends of the friction blocks, a ring connecting the guide blocks, means for holding the ring and the guide blocks in normal position, a rocker carried by the box and adapted to move the ring and guide blocks into abnormal position, and an oscillatory arm for controlling the travel of said rocker.

9. A feed for a heading machine consisting of a shaft, a drum fixed to the. shaft, a box loose on the shaft, friction blocks within thedrum, means arranged between the box and the friction blocks for moving the latter inward and outward, means for oscillating said box, a movable connection between said means and said box, a screwand gearing for adjusting said connecting means in or out from the axis of said box, and a hand wheel for turning said gearing.

10. A feed mechanism for a heading machine consisting of an oscillatory member,

means for oscillating said member, a rotatory member, friction blocks movable radially into and out of operative engagement with said rotatory member by the movements of the oscillatory member, and means for rendering the friction blocks inoperative.

CHARLES T. BRENNAN Witnesses:

HARRY R. WILLIAMS, ADoLPH C. KAISER.

Copies of this patent may be obtained'for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.