JPS6037239A - Device for upsetting and transferring work of cold pressing machine - Google Patents

Abstract

PURPOSE:To provide a titled device which can increase the wall thickness of fingers, etc. by the constitution in which the fingers holding a work are rotated by an oscillating gear which has the same number of teeth as that of a stationary gear of an oscillating body and meshes with said stationary gear to upset and transfer the work. CONSTITUTION:A cold pressing machine is provided with plural dies 3 in the horizontal direction to a die block 2 fixed to a frame 1 and performs cold pressing of a work (a) between the dies 3 and the punches mounted to a ram (not shown in a figure) facing the dies. A horizontal stationary gear 22 is fixed to the upper part in the intermediate position of the above-mentioned adjacent dies 3 with such cold pressing machine and an oscillating gear 26 having the same number of teeth as that of said gear is freely rotatably provided to an oscillating body 10 which oscillates 90 deg. around the axial center of the gear 22. As said body 10 oscillates, the work (a) is held by fingers 28 mounted to the top end of an operating bar 33 fixed and suspended to the gear 26, is upset 180 deg. and is transferred to the other adjacent dies 3. It is possible to increase the wall thickness of the fingers 30, etc. and to increase the strength thereof by increasing the space between the front surface of the dies 3 and the fingers 30.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a die block fixed to a frame facing a reciprocating ram, in which a plurality of dies are arranged at intervals in the horizontal direction, and each die and a punch attached to the ram In a heading machine that performs heading forming by pressing the workpiece between
This invention relates to a reversing and transferring device that rotates a workpiece by 80 degrees and transfers it to the front side of another adjacent die.

A heading machine such as a parts former has a structure in which a plurality of punches are mounted in a line on a reciprocating ram, and a plurality of dies corresponding to each of the above-mentioned punches are mounted on a die block facing the ram. A workpiece cut to a certain length is transferred to the front of the first die and pressed against the punch, then the workpiece is turned 180 degrees and transferred to the front of the second die and pressed. The final product is completed by rotating the workpiece 180 degrees from the side with a lower degree of processing to the front side of the die with a higher degree of machining, and applying pressure with the punch each time. Conventionally, as a work reversal transfer device used in such a heading machine, as disclosed in Japanese Patent Publication No. 18427/1984, the core axis of the fingers that clamp the work is supported pivotally on the tip of an arm that swings about a single point. A gear having a diameter of 1/2 of the sector gear is engaged with the core shaft, and a gear having a diameter of 1/2 of this sector gear is engaged, and as the arm is swung by 60 degrees, , a device is known in which the workpiece gripped by the fingers is rotated 60' and rotated 120°, thereby inverting the workpiece 180° from the front of one die to the front of the next die and transferring the workpiece. .

However, in such conventional devices, the revolution angle of the fingers is as small as 60'', and when the fingers take a right-angled attitude to the die block at the center of their swing locus, the front surface of the die block and the fingers are close to each other. Since the distance between the centers of the punches and fingers is short, when the diameter of the workpiece is large, it is necessary to reduce the thickness of the punch and the fingers, resulting in a corresponding decrease in strength.

An object of the present invention is to eliminate the above-mentioned problems and provide a work reversal transfer device with a novel structure.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

As shown in FIGS. 2 and 3, five dies 3 (-
(The dies on the aroma stone side are not shown) are fitted horizontally at regular intervals, and a kick-out pin 5 is inserted freely into the forming hole 4 of each die 3, and a die block A ram (not shown) that reciprocates in opposition to 2,
Similarly, five punches (not shown) are attached to face each of the dies 3 described above.

As shown in FIG. 3, a base body 9 having a U-shaped cross section is fixed horizontally to the front surface of a support frame 8 erected on the upper surface of the frame 1. An oscillating body 1O, which is made up of horizontal plates coupled at intervals, is installed parallel to the base 9, and as shown in FIG. A parallel link mechanism is constructed by connecting a shaft 12 attached to the shaft 12 with two links 13 parallel to each other. The tip of an operating rod 16 connected to a drive device is connected via a ball joint 17, and as the operating rod 16 reciprocates in the left-right direction in FIG. As shown in the figure, both links 13 are tilted 45 degrees to the left with respect to the base 9 and the left position is close to the front surface of the base 9, and both links 13 are tilted 45 degrees to the right with respect to the base 9. In the tilted state, it swings between a right position close to the front surface of the base body 9 and a swing angle of 90°.

A total of four first tube shafts 20 are vertically fixed to the base body 9, corresponding to the upper intermediate positions of the adjacent dice 3,
A bracket 21 and a fixed gear 22 having a semicircular tooth surface are fixed to the upwardly protruding end of each first tube shaft 20, while four second tube shafts in the vertical direction are fixed to the oscillator 10. 2
5 is rotatably supported at the same interval as the first tube shaft 20 described above, and at its upper end there is a rocking gear having the same number of teeth as the fixed gear 22 described above and the same quarter-circular tooth surface. A gear 26 is fixed and meshes with each of the corresponding fixed gears 22, and a pair of fingers 28 is supported by a shaft 29 to be freely swingable on a bracket 27 fixed to the lower end of the second tube shaft 25. As described above, as the rocking body 10 swings 90 degrees, the second tube shaft 25 moves to the first
The fourth
As shown in FIG. 5, the swing gear 26 is connected to the fixed gear 2.
By rolling and rotating 90 degrees, a total of 1
It rotates 80 degrees, and each pair of fingers 28 (well, the rocking body 10
is in the left position, the four dice 3 on the left side of the five chairs 3 are located in front of the chair block 2 in a parallel attitude, and the rocking body 10 is in the right position. Sometimes, it is reversed from the above-mentioned position and is positioned in front of the four dice 3 on the right side in a position parallel to the die block 2.

As shown in FIG. 3, a clamping portion 30 for the workpiece a is formed at the lower end of the pair of fingers 28, and a binion 31 facing each other is formed on each of the two ring portions. A rack 34 formed at the lower end of the operating rod 33 that is slidably fitted into the 'FIii11125 is engaged with both pinions 31, and the first tube shaft 20 is engaged with both pinions 31.
A vertical sliding rod 36 is fitted inside to freely slide, and is urged to move upward by the elastic force of a compression coil spring 37 attached to the lower surface of the rod. The other end of the connecting body 38, which has one end fixed to the fork, is inserted into and connected to a connecting member 39, which is fixed to the upper end of the operating rod 33 and has locking flanges at both upper and lower ends. , an operating lever 40 is swingably supported by a shaft 41 on the rear protruding end of a bracket 21 fixed to the lower surface of the fixed gear 22, and a bolt 42 is attached to one end of the operating lever 40.
is in contact with the child end surface of the sliding rod 36, and at the other end, a follower roller 43 is rotatably supported by a shaft 44, and this follower roller 43 is stretched between the side plates of the support frame 8 described above. The follower roller 43 presses against the circumferential surface of an eccentric cam 46 which is rotatably supported and fixed to a camshaft 45 connected to a ram drive device.As shown by the solid line in the figure, the follower roller 43 Large diameter portion 4 of cam 46
6a, the operating lever 40 swings counterclockwise and pushes down the sliding rod 36 against the spring force of the compression coil spring 37, thereby lowering the operating rod 33 to the lower position. , the pair of fingers 28 close and the center of the clamping part 30 is located at the axis of the forming hole 4 of the die 3, and the eccentric cam 46 rotates half a turn to rotate its small diameter, as shown by the chain line in the same figure. When the portion 46b moves to the upper position, the sliding rod 36 rises due to the restoring spring force of the compression coil spring 37, the operating lever 40 swings clockwise, the operating rod 33 rises to the upper position, and the finger 28 moves upward. It is designed to open.

Next, the operation of this embodiment will be explained.

First, while the rocking body 10 is rocking to the right position, a workpiece a cut to a certain length by a shearing die (not shown) is transferred to the front of the leftmost die 3 in FIG. , the ram moves forward and the first forging is performed between the die 3 and the punch, and at the same time as the ram moves back, the operating rod 16 moves to the left and the swinging body 10 swings to the left position. Then, the leftmost finger 28, which was waiting in an open state in front of the second die 3, is turned 180 degrees and transferred to the front of the leftmost die 3, and the molded workpiece a is When pushed out by the kickout pin 5, the large diameter portion 46a of the eccentric cam 46 engages with the follower roller 43 of the operating lever 4o, as shown by the solid line in FIG. 3, and the operating lever 4o is swung counterclockwise. The sliding rod 36 is pushed down, and the operating rod 33 is lowered to release the pair of fingers 2.
8 is closed and the clamping portion 30 clamps the workpiece a, and then,
The operating rod 1G moves to the right and the rocking body 10 moves to the right position, and at this time, the second tube shaft 25 revolves 90 degrees around the axis of the first tube shaft 20, and the second tube shaft As shown in FIGS. 4 and 5, the shaft 25 itself is rotated 90° by the swinging gear 26 fixed to the second tube shaft 25 rolling the fixed gear 22 over a range of 90°. °Because it rotates,
It rotates a total of 180 degrees, and the workpiece a held by the fingers 28 is reversed 180 degrees and transferred to the front of the second die 3, and the ram moves forward and the second punch hits the rear surface of the workpiece a. At the same time as the front end faces into the molding hole 4,
As shown by the chain line in FIG. 3, the small diameter portion 46 of the eccentric cam 46
b reaches the upper position, the sliding rod 36 moves up while swinging the operating lever 40 clockwise, and the operating rod 33 rises accordingly, opening the pair of fingers 28 and releasing the subsequent punch. The second forging is performed by advancing, and then by repeating the same operation as described above, the workpiece a is moved from the one with a lower degree of processing to the one with a higher degree of processing by the second, third, and fourth fingers 28. The workpiece is sequentially transferred to the front surface of the die 3 and subjected to heading forming, and when the final forming is performed by the fifth die 3 (not shown), the kickout pin 5 advances and pushes out the workpiece a, and the workpiece a is moved by gravity. It is discharged downward.

As specifically explained in the above embodiment, the workpiece reversing transfer device for a heading machine of the present invention has a plurality of dies horizontally spaced apart from each other on a die block fixed to a frame facing a reciprocating ram. In the forging machine, which performs forging by pressing the workpiece between each of the dies and a punch attached to the ram, the axis of the die block is vertically located above the intermediate position between the adjacent dies. A oscillating gear having the same number of teeth as the fixed gear is fixed to a oscillating body that oscillates by 90 degrees in conjunction with the reciprocating motion of the ram about the axis of the ram. is rotatably supported and meshed with the fixed gear, a pair of fingers are freely opened and closed supported at the lower end of a support shaft fixed to the center of the oscillating gear, and the work piece is projected from one of the dies. The gist is that the die is gripped by the fingers, rotated 180° and transferred to the front surface of the other adjacent die, and the support shaft supporting the fingers is rotated 90°. Therefore, when the finger takes a perpendicular attitude to the die block at the center of its swing trajectory, the distance between the front of the die block and the center of the finger can be increased, and the punching and This has the effect of increasing the strength by increasing the thickness of the fingers.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of an embodiment of the device of the present invention, and FIG.
The figure is a partially cutaway front view, FIG. 3 is a partially cutaway side sectional view, and FIGS. 4 and 5 are operation explanatory views of the main parts. 1: Frame 2: Dice block 3: Dice 10
: Oscillating body 22: Fixed gear 25: Second pipe shaft 26: Oscillating gear 28: Finger 33: Operating rod a: Work applicant Asahi Inukuma Sangyo Co., Ltd. agent Patent attorney Hiroshi Noguchi

Claims (1)

[Scope of Claims] 1 A plurality of dies are installed at intervals in the horizontal direction on a die block fixed to a frame facing a reciprocating ram, and a workpiece is placed between each die and a punch attached to the ram. In a heading machine that performs heading forming by pressing, a fixed gear whose axis is vertical is fixed above an intermediate position between the adjacent dies of the die block, and the axis of the fixed gear is set vertically. A rocking gear having the same number of teeth as the fixed gear is rotatably supported on a rocking body that swings 90° in conjunction with the reciprocating motion of the ram about the center, and meshes with the fixed gear, so that the rocking A pair of fingers is supported at the lower end of a support shaft that is fixed to the center of the gear and hangs down, and the workpiece protruded from one of the dies is gripped by the fingers, rotated by 18 degrees, and the workpiece is rotated by 18 degrees to Work reversal transfer device 2 for a heading machine, characterized in that the work is transferred to the front side of a die.The support shaft is a tube shaft, and an operation rod for opening and closing the pair of fingers is inserted into the tube shaft. A workpiece reversal transfer device for a heading machine according to claim 1, wherein the operating rod is connected to a drive device that is linked to the reciprocating movement of the ram.