JPS6235545Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a heading machine that performs heading forming by pressing a workpiece between a punch and a die attached to a reciprocating ram. The present invention relates to an opening adjustment device for a work transfer finger that is gripped and transferred to the front surface of another adjacent die.

A plurality of punches are installed in a line on a reciprocating ram, and a plurality of dies corresponding to each of the above-mentioned punches are attached to a die block facing this ram, and the workpiece is processed from the one with the lowest degree of machining to the one with the highest degree of machining. For a heading machine that completes the final product by sequentially transferring the workpiece to the front of the workpiece and pressing it with a punch each time, there is a case where the workpiece is transferred while being turned 180 degrees. For this reason, as a heading machine that is capable of both types of transfer and that can be easily switched, it is recommended that the die block be moved at an intermediate position between adjacent dies. A rocking body that is provided with a first gear whose axis is in the vertical direction above, and that swings at a constant angle with equal left and right swing angles about the shaft center of the first gear in conjunction with the reciprocating motion of the ram. A second gear is rotatably supported, a pair of fingers are supported at the lower end of a support shaft fixed to the center of the second gear, and the first gear or the second gear are meshed close to each other. The workpiece is protruded from one die and held by the fingers, and is rotated 180 degrees with both gears in mesh.
A new heading machine has been developed that is equipped with a workpiece transfer device that transfers the workpieces to the front of adjacent dies while maintaining the original position with both gears in a non-meshing state.

The finger opening/closing device of this heading machine has a support shaft as a tube shaft, and a pair of fingers are supported at the lower end of the shaft to open and close freely, and engage with the pair of fingers in the tube shaft to move the fingers in the axial direction. Insert the operating rod that opens and closes the pair of fingers, fix the peripheral cam to the camshaft that rotates in conjunction with the reciprocating motion of the ram, and insert the direction in which one end engages the peripheral cam with a support fixed to the frame. The lever is pivotably supported to swing freely, the other end of the lever is engaged with the operating rod, and the pair of fingers are opened and closed in conjunction with the ram, As shown by the chain lines in FIG. 4, when workpiece a is held between a pair of fingers A and B and transferred to the front of the die, the ram moves forward and fingers A and B open, and the punch moves between fingers A and B. By pressing the workpiece a between the die and the die through the space between the rams A and B, heading forming is performed in which a head with an enlarged diameter is formed as shown by the solid line, and at the same time as the ram retreats, the fingers A and B are The workpiece returns to the front of the adjacent preceding die, but if the workpiece is to be transferred in its original position, the fingers A,
Since B swings in parallel with the die block, if the maximum opening degree of fingers A and B is small, the right finger B will move workpiece A during its swing stroke.
There is a risk of interference with the expanded diameter head of workpiece A, so fingers A and B must be opened wide so that their tips pass through a position higher than the top surface of the expanded diameter head of workpiece A, as shown by the solid line in the same figure. On the other hand, when workpiece a is transferred while being reversed by 180 degrees,
When fingers A and B rotate and swing by 180 degrees, finger B on the right side swings with a large swing radius and draws a trajectory that goes around the protruding end of workpiece a. It is sufficient that the fingers A and B are opened to the extent that there is no risk of interference and that interference is avoided when the punch passes through. Rather, the maximum opening degree of fingers A and B should be set when the workpiece is transferred in its original position. If they are made to be the same size, when fingers A and B take a right-angled attitude to the die block in the middle of their swing strokes, there is a risk that the left finger A will interfere with the die block. It is necessary to adjust the maximum opening of fingers A and B to a large opening when transferring the workpiece in its original position, and to a small opening when transferring the workpiece while inverting it by 180 degrees. .

In addition, even if the heading machine has only the function of transferring the workpiece in its original position, the maximum opening degree of the fingers should be adjusted so that adjacent fingers do not interfere with each other when the fingers are fully opened. need to be adjusted.

The present invention was devised based on such circumstances, and an object of the present invention is to provide a device that can easily adjust the maximum opening degree of a workpiece transfer finger.

Hereinafter, an embodiment in which the device of the present invention is applied to a heading machine having a function of transferring a workpiece while inverting it by 180 degrees and a function of transferring the workpiece while maintaining its original posture will be described based on the attached drawings. .

In the figure, in a die block 2 attached to the front side of a frame 1, five dies 3, whose machining efficiency increases sequentially from the left side to the right side in Figure 1, are placed horizontally at regular intervals. A kickout pin 5 is inserted into the molding hole 4 of each die 3 so as to freely move forward and backward, and a ram (not shown) that reciprocates opposite the die block 2 is provided with a ram (not shown) facing the die block 2 . Similarly, five punches (not shown) are attached.

Support frame 8 erected on the top surface of frame 1
A base 9 with a U-shaped cross section is horizontally fixed on the front surface of the base 9, and a singing body 10, which is made up of two upper and lower horizontal plates joined at a distance, is mounted parallel to the base 9. As shown in FIG. A parallel link mechanism is constructed, and the left end of the rocking body 10 is connected to an actuating member that is connected to a ram drive device (not shown) and reciprocates in the left-right direction in FIG. 1.

A total of four cylindrical bodies 15 are vertically fixed to the base body 9 at positions above the intermediate positions of the adjacent dies 3, and a sector is attached to the upwardly protruding end of each cylindrical body 15 via a bracket 16. First gear 1 consisting of gears
7 is attached, and elongated holes 18 in the front-rear direction are bored on both left and right sides of each first gear 17, and bolts 19 are screwed through the shaft portions of the elongated holes 18. On the other hand, on the swinging body 10, four vertical tube shafts 25, to which a pair of left and right fingers 28, 28 for holding a workpiece a, which will be described in detail later, are attached, rotate at the same interval as the cylinder body 15. Second gears 26 are freely supported, and fixed to their upper ends are second gears 26 each consisting of sector gears having the same number of teeth as the first gears 17 described above.
As shown by the solid line in the figure, if the tube shaft 25 is fixed in a meshed state with the second gear 26, as the rocking body 10 swings, the tube shaft 25 will move 90 degrees around the axis of the first gear 17.
At the same time as the tube shaft 25 revolves, the second gear 26 rolls on the first gear 17 over a range of 90 degrees, so that the tube shaft 25 rotates 90 degrees, and the tube shaft 25 rotates in total.
By rotating 180 degrees, each finger 28
moves the workpiece a from the front of the left die 3 of the adjacent left and right dies 3 to the front of the right die 3.
When the first gears 17 are reversed 180 degrees and transferred, and conversely, each of the first gears 17 is moved backward and fixed in a position where it does not mesh with the second gear 26, as shown by the chain line in FIG. Since the tube shaft 25 does not rotate around the axis, the finger 28 swings 90 degrees while remaining parallel to the die block 2, and the workpiece a
The device is designed to transport objects in their original position.

The pair of fingers 28, 28 described above are connected to the tube shaft 2.
The shaft 2 is attached to the bracket 27 fixed to the lower end of the shaft 2.
9 and 29 to freely swing, partial gears 31 facing each other are formed at the upper ends of both fingers 28, and a vertical operating rod 33 slides inside the tube shaft 25. Fitted with freedom of movement,
A rack 34 formed at the lower end meshes with both partial gears 31, and a vertical sliding rod 36 is fitted in the cylinder 15 so as to be able to freely slide. A compression coil spring 37 is attached, and the spring force of this compression coil spring 37 moves the sliding rod 3.
The connecting rod 38 has one end fixed to the upper end of the sliding rod 36, and the other end of the connecting rod 38 is fixed to the upper end of the operating rod 33. The operating rod 33 and the sliding rod 36 are inserted into a connecting member 39 that has locking flanges on both upper and lower ends.
The upper ends of the two are connected to each other.

Each of the four brackets 16 attached to the upper surface of the base body 9 has a lever 40 on its rear protruding end.
is supported by a shaft 41 to freely swing, and a bolt 43 is screwed into a mounting hole 42 formed at one end and fixed with a retaining nut 44, and the tip of this bolt 43 is connected to the sliding rod. A lever 40 is urged to swing clockwise in FIG. 2 by engaging with the upper end of the lever 40. A follower roller 46 is rotatably supported at the other end of the lever 40 by a shaft 47. 43 is the support frame 8 mentioned above.
The cam 49 is rotatably supported across the side plates of the ram, and is engageable with the cam surface of a peripheral cam 49 fixed to a cam shaft 48 connected to a ram drive device.

A mounting hole 51 with a female thread cut on the circumference is formed on the follower roller 46 side of the lever 40 at a position corresponding to above the rear end 16a of the bracket 16, and a bolt 52 is inserted into the mounting hole 51 at its tip. A pair of upper and lower adjustment rings 54 are fitted between the head of the bolt 52 and the upper surface of the lever 40, and the lower adjustment ring 54 is fixed to the upper surface of the lever 40, and both adjustment rings 54,
On the abutting surface of 54, the surface is divided into four in the circumferential direction, and two convex portions 54a and two concave portions 54b are formed alternately on each side, and each convex portion 54a fits into the concave portion 54b of the other side. As shown in FIG.
If the bolt 52 is tightened with the protrusions 54a of the two abutting against each other, the amount of tightening of the bolt 52 will be reduced, and the lever 4 at the tip of the bolt 52 will be tightened less.
As shown in FIG. 3, the length of the protrusion from the lower surface of the bolt 52 is shortened, and as shown in FIG. When tightened, the amount of tightening increases, and the protruding length of the tip of the bolt 52 becomes longer.

Next, the operation of this embodiment will be explained.

Note that although the attached drawing shows the case where the workpiece a is transferred while being inverted, the operation of adjusting the opening degree of the finger 28 is exactly the same when the workpiece a is transferred in its original position. It is.

First, as shown in FIG. 2, the bolt 52 is tightened with the pair of adjustment rings 54, 54 brought into contact with their convex portions 54a, and the protruding length of the tip of the bolt 52 from the lower surface of the lever 40 is adjusted. When the small diameter portion 49b of the peripheral cam 49 reaches the upper position, the spring force of the compression coil spring 37 causes the follower roller 46 to move to the small diameter portion 49b, as shown by the solid line in the figure. As the lever 40 is swung clockwise until it is engaged, the sliding rod 36 rises, the operating rod 33 rises, and the pair of fingers 28 move as shown by the solid line in the figure. The upper adjusting ring 54 is rotated 90 degrees as shown in FIG.
4b and adjust the protrusion length of the tip of the bolt 52 from the lower surface of the lever 40 to be longer, the small diameter portion 49b of the peripheral cam 49 will reach the upper position and the lever When the lever 40 swings clockwise, the tip of the bolt 52 hits the rear end 16a of the bracket 16, so that the lever 40 allows the follower roller 46 to move to the small diameter portion 49b.
As a result, the lifting rod 36 and the operating rod 33 move at a small swing angle such that they move only to a position separated from the center, and the amount of rise of the lifting rod 36 and the operating rod 33 becomes small, and the pair of fingers 28 move as shown by the solid line in the figure. It opens at a small opening.

Furthermore, regardless of the adjustment of the length of the protrusion of the tip of the bolt 52 from the lower surface of the lever 40, as shown by the chain line in FIGS. 2 and 3, the large diameter portion 49a of the peripheral cam 49 is By engaging with the follower roller 46, the 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 and releasing the finger. 28 is closed and the workpiece a is held.

In the above embodiment, the length of the protrusion of the tip of the bolt 52 from the lower surface of the lever 40 is switched in two stages, but this protrusion length can be changed continuously depending on the amount of tightening of the bolt 52. Also, when such an opening adjustment device is applied to a heading machine that only has the function of transferring the workpiece in its original position, adjacent fingers may interfere with each other. It becomes possible to adjust the opening degree of the finger to be as wide as possible within a range where the opening is not exceeded.

As specifically explained in the above embodiment,
The finger opening adjustment device in the heading machine of the present invention fixes the peripheral cam to the camshaft that rotates in conjunction with the reciprocating motion of the ram, and fixes the peripheral cam to the lower end of the tube shaft that reciprocates between the front surfaces of adjacent dies. A support that supports a pair of fingers to freely open and close, and inserts into the tube shaft an operating rod that engages with the pair of fingers and opens and closes the pair of fingers by moving in the axial direction, and is fixed to the frame. A lever, whose one end is biased to swing in a direction that engages the peripheral cam, is freely pivoted, and the other end of the lever is engaged with the operating rod, and the pair of fingers is engaged with the operating rod. In the heading machine that opens and closes in conjunction with the ram, the lever is provided with an engaging member whose tip protrudes from a surface corresponding to the support and whose protruding length can be adjusted; The swing angle of the lever is adjusted by bringing the tip of the lever into contact with the support and separating the one end of the lever from the small radius portion of the cam surface of the peripheral cam, thereby adjusting the maximum opening of the pair of fingers. The gist is that the structure is configured to adjust the
The maximum opening degree of the finger can be adjusted by simply adjusting the protruding length of the tip of the engaging member provided on the lever, and the contact between the finger and the workpiece or other parts when the finger is opened can be adjusted. interference or
Interference between adjacent fingers can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of an embodiment of the present invention.
2 and 3 are partially cutaway side sectional views thereof, and FIG. 4 is a partially enlarged view showing the positional relationship between the fingers and the workpiece. 1: Frame, 3: Dice, 16: Bracket, 16a: Rear end (of bracket 16), 2
5: Tube shaft, 28: Finger, 33: Operation rod, 4
0: Lever, 41: Shaft, 48: Cam shaft, 49: Peripheral cam, 49b: Small diameter portion (of peripheral cam 49), 5
2: Bolt, 54: Adjustment ring.

Claims (1)

[Scope of utility model registration request] A peripheral cam is fixed to a camshaft that rotates in conjunction with the reciprocating motion of the ram, and a pair of fingers are supported at the lower end of a tube shaft that reciprocates between the front surfaces of adjacent dies to open and close freely. An operating rod that engages with the pair of fingers and opens and closes the pair of fingers by moving in the axial direction is inserted into the inside, and the operation rod is swung into a support fixed to the frame in a direction such that one end thereof engages with the peripheral cam. In a heading machine, a dynamically biased lever is pivotally supported to freely swing, the other end of the lever is engaged with the operating rod, and the pair of fingers are opened and closed in conjunction with the ram. , the lever is provided with an engaging member whose distal end protrudes from a surface corresponding to the supporting body and whose protruding length can be adjusted; and the distal end of the engaging member is brought into contact with the supporting body so that the one end of the lever A heading machine characterized in that the swinging angle of the lever is adjusted by separating the part from the small radius part of the cam surface of the peripheral cam, thereby adjusting the maximum opening degree of the pair of fingers. Finger opening adjustment device.