JP3184800B2 - Billet receiving structure for forging press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a billet receiving structure for a device for supplying a billet sent by a chute to a forging press.

[0002]

BACKGROUND ART For example, a forging press machine A with the transfer feed device, Fig. 1, with reference to FIG. 2, each press position P ₁ on the lower die _{Q, P 2, P 3,} P 4, P ₅
Work (billet) with the finger e of the beam F that moves up, down, left, right, and back and forth of the transfer feed device.
By repeatedly performing the operation of grasping and releasing the b, the billet b is sequentially shifted to each of the press positions P ₁ , and press working is performed. In this case, is supplied billet b in the initial position P ₀ or pressing position P _1, the press complete article (paid out) carried away from the press position P _5. The carry-out is transferred to a conveyor by an appropriate means and transferred to a required position.

In such a forging press A, the billet b is fed (supplied) to the initial positions P ₀ and P _1.
In this case, the transfer means using only the chute C cannot respond not only to the relationship of the space, but also to the positioning (set) accuracy, the correspondence to each feeding posture of the billet b and the like. For this reason, conventionally, a separate billet supply device B is installed beside the press machine A, and the billet b is sent from the induction heater to a predetermined position D by, for example, a chute C, and the billet b at this position D is grasped. Initial position P ₀ , P
Moved to ₁ (set).

As a prior art of the billet supply device B, there is one disclosed in Japanese Patent Application Laid-Open No. 6-328181. In the billet supply device B described in this publication, as shown in FIG. 12, a fixed frame 101 is attached to a support 105 or the like of a forging press A, and a first joint shaft 108 is attached to a distal end of the fixed frame 101 via a first joint shaft 108. One arm 102 is pivotally supported, and a second arm 103 is pivotally supported at the distal end of the first arm 102 via a second joint shaft 109. The second arm 103 has a clamp 104 for gripping the billet b, and
A reversing mechanism 110 capable of reversing the degree is provided at the rear end.

After the billet b transferred from the chute C is gripped by the clamp 104, the billet receiving table 1
Flip 11 like a dashed line and retreat, then clamp 10
4 is rotated by 90 degrees as indicated by the arrow, and the billet b is changed from the vertical feed position to the horizontal feed position (solid line on the cradle 111 in the same figure as indicated by the chain line in the feed state).
By the rotation control of 6, 107, the first arm 102 and the second arm 103 swing as shown by a chain line via a gear mechanism, and the clamp 104 moves as shown by the broken lines S ₁ and S ₂ , and the forging press A supplying billet b in the first press position P _1. In the case where the vertical feed position is supplied to the first press position P ₁ of the forging press machine A is supplied without the rotation of the 90 degrees.

[0006]

The supply arm (first arm 102, second arm 103) of the billet b, including the billet position supply device described in the above publication, is centered on one axis (joint axes 108, 109). To the receiving position D (the billet receiving base 111) by the clamp 104 at the tip.
From the billet b. At this time, as described above, the pedestal 111 is retreated as shown by a chain line so as not to hinder the movement of the clamp 104. In addition, there is also a type in which a part of the chute C is used as a cradle.
You can move that part down (see examples below),
The cradle portion is made to be able to move in and out of the other shoots C, and is retracted by being immersed.

Conventionally, the retreating means operates the actuator to retreat the cradle 111 (part of the chute) in response to a confirmation signal that the billet b has been clamped.

[0008] In order to reduce the forming load of the forging press A, how to supply the heated billet b discharged from the heater to the forging press A quickly becomes a problem.
Therefore, after obtaining the billet b confirmation signal, the cradle 1
If you are leaving 11 or the like, that time is wasted, and it is desired to shorten it.

SUMMARY OF THE INVENTION In order to meet the above-mentioned demand, it is an object of the present invention to shorten a receiving time by allowing a pedestal or the like to move out in conjunction with a billet clamping operation and a clamp moving operation.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention separates a receiving portion (a receiving position chute) of the chute and swings downward at the separation point so as to retreat from a receiving position. Means for enabling the fixed position hook provided on the immovable frame to be locked to the receiving position chute to maintain the receiving position chute at the receiving position, and to unlock the hook and the receiving position chute at the clamp. And the receiving position chute has
The receiving position chute is always urged downward to retreat so as not to hinder the movement of the clamp, and after the movement of the clamp, the receiving position chute is returned to the receiving position. Fixed position)
I always tried to return.

In this case, the receiving position chute retreats with the movement of the clamp, so that the movement of the clamp is continuous without stopping, and the time for billet supply is shortened. When the clamp retreats from the receiving position chute, the chute returns to the receiving position, and the next billet is sent to the receiving position by a return signal or the like.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is as follows.
The tip of the supply arm is reciprocated between the receiving position where the billet is conveyed by the chute and the billet transfer position of the forging press, and the billet is gripped by the clamp at the tip of the supply arm, and the billet is In the device for carrying from the receiving position to the transfer position and supplying to the forging press, a claw is provided on the receiving position chute, and the hook is locked to the claw, thereby maintaining the receiving position chute at the receiving position, Making the hook swingable and biasing toward the locking position by a spring,
The clamp is provided with a pressing element for releasing the locking by swinging the hook against the spring, and a tensioned spring is provided on the receiving position chute and an air cylinder for returning is provided. It is possible to adopt a configuration that constitutes a return means.

According to this structure, the presser comes into contact with the hook and swings as the clamp moves, whereby the hook and the claw are disengaged and the receiving position chute is retreated from the receiving position by the spring. Therefore, the movement of the clamp is not hindered. When the clamp retreats from the receiving position chute, the air cylinder moves and the chute rises, the pawl is engaged with the hook, and the chute is set to the receiving position. If set, the operation of the air cylinder stops (air supply stops).

[0014]

In this embodiment, as shown in FIGS. 1 and 2, a billet b is fed from a induction heater onto a chute C to a receiving position D as indicated by an arrow. At this time, a magazine (not shown) and an air cylinder driven shutter S are provided in the middle of the chute C, and billets b from the induction heater are stored in the magazine one by one, and the magazine is opened and closed by opening and closing the shutter S. Are sent to the receiving position D one by one. Billet supply device B, grabbed billet b in the receiving position D (chucks) is set before the position P ₀ or the first press position P ₁ of the forging press A.

The chute 1 ahead of the shutter S is swingable downward on the frame F at its separation point, and is positioned by the air cylinder 2 so as to be linear with the chute C as shown by the solid line in FIG. Is done. As shown in FIG. 10, the middle of the chute 1 is missing and the fed billet b is positioned over the lacking portion 1a. The positioning is performed by moving the bolt type stopper 7 into and out of the chute 1 in accordance with the length of the billet b. Further, the chute 1 is provided with a spring 3. When air is not fed into the air cylinder 2, the chute 1 retreats downward by the spring 3 so as not to hinder the movement of a clamp 50 described later. .

The frame F has an arm extending to a position near the receiving position D (not shown), and a hook 4 is swingably provided on the arm via a shaft 4a. The hook 4 is always pushed by a spring 5 and is located at a fixed position shown by a solid line in FIG. The hook 6 is engaged with the claw 6 of the chute 1 at the receiving position D. By this locking, the chute 1 is maintained at the receiving position D without swinging by the spring 3 even when the pushing force of the air cylinder 2 is released.

As shown in FIGS. 1 to 8, the billet supply device B is provided on a base frame H (legs are omitted) installed near the forging press A. A hole 10 in the front-back direction is formed in the base frame H, and a vertical frame 11 moving back and forth passes through the hole 10. Rails (linear guides) 12 are arranged on both sides of the hole 10, and a slider 11 b fixed to the vertical frame 11 via a bracket 11 a is fitted to the rail 12. The vertical frame 11 moves forward and backward while maintaining the vertical state.

Further, arranged ball screw 13 along the bore 10, the ball screw 13 is rotated via the belt 13a and the pulley 13b by the servo motor M _1. The belt 13a and the pulley 13b is a toothed, as a pseudo gear coupling, rotation of the motor M ₁ is adapted to be reliably transmitted to the screw 13. The ball screw 13 is fit ball screw nut 14 screw integral to the vertical frame 11, screw 13, that is, by the rotation of the motor M _1, the vertical frame 11 is moved back and forth.

A ball screw 15 is provided in the vertical frame 11 and supported at its upper and lower ends.
Belt 15 by a servo motor M ₂ of electromagnetic brake
a through the pulley 15b. The belt 15a and the pulley 15b are also provided with teeth. Ball screw 15
, A moving body 16 is screwed via a ball screw nut 16a. A rear end of the swing arm 20 is rotatably attached to a lower end of the vertical frame 11 via a pin 21.

As shown in FIG. 9, the swing arm 20 includes a support portion 22 through which a pin 21 passes, a first cylinder 30 provided at one end of the support portion 22, and a second cylinder provided at one end of the cylinder 30. 40. A ball screw 31 is rotatably supported at both ends in the first cylinder 30, and a ball screw nut 32 forming a part of a piston 33 is screwed to the screw 31. When air a is applied to the piston 33, the ball screw nut 32 moves forward as shown by the chain line in FIG. 9 against the coil spring 34, and the ball screw 31 rotates by a quarter lead (rotated 90 degrees). Do). When the application of the air a is released, the piston 33 returns to the state shown in FIG. At this time, the rotation of the piston 33 is prevented by the guide pin 33a, and the movement stroke L of the piston 33 becomes one quarter of the ball screw 31.
Become a lead.

The tip of the ball screw 31 is connected to the second cylinder 40
Are fitted into the rear end of the
1, 40 are integrated. The second cylinder 40 is rotatably supported by a cylindrical case 43 connected to an outer cylinder of the first cylinder 30 by a radial bearing 42a and a thrust bearing 42b. The bearings 42a and 42b are prevented from coming off by screwing the retaining ring 44. A piston 45 is provided inside the second cylinder 40, and a rod 46 of the piston 45 projects from the other end.
Is applied, the piston 45 is opposed to the coil spring 47.
Moves forward.

First, the compressed air passages to the first and second cylinders 30 and 40 are connected to the caps 23 at both ends of the pins 21 by the inlets a.
₁ and a ₂ are formed, and the inlets a ₁ and a ₂ are
It communicates with the cylinders 30 and 40 through the inside 1 and the inside of the bearing 22. The passage leading to the second cylinder 40 passes through the inside of the ball screw 31 and reaches the inside of the cylinder. In the figure, c denotes an air leakage preventing packing such as an O-ring, 21a denotes a radial bearing, and 21b denotes a thrust bearing.

The other end of the second cylinder 40 has a clamp 50
Is provided. The clamp 50 includes a clamp claw 51a that moves linearly back and forth and a clamp claw 5 that swings back and forth.
1b and a link mechanism. The link mechanism includes a swing link 53 and a chuck arm 52 fixed to the cylinder 40.
The center of a is pinned, and the rear end of the swing link 53a and the chuck arm 52 are connected by a link 53b. One clamp claw 51a is fixed to the piston rod 46, and the other clamp claw 51b is fixed to the tip of the swing link 53a.

For this reason, the piston 4 of the second cylinder 40
When 5 is retracted, the two clamp claws 51a and 51b are largely separated from each other, making it easier to grasp the billet b at the receiving position D (see FIG. 10A). In this state, when the piston 45 advances, one clamp claw 51a advances, and the other clamp claw 51b swings downward to grip the billet b (see FIG. 11).

The piston rod 4 of the second cylinder 40
6, a presser 55 is provided together with one clamp claw 51a, and when the clamp 50 is located above the receiving position D (in a dashed line state in FIG. 2), the presser 55 is hooked. 4. This state is shown in FIG.
In this state, as shown in FIG. 11, when the clamp claws 51a and 51b are rocked (approaching) and the billet b is gripped, as shown in FIG. 4 is swung against the spring 5 as shown by the arrow. By this swing, the hook 4 and the claw 6 are unlocked, and the spring 3
As a result, the chute 1 swings downward and the clamp claw 51b
(FIG. 11B).

When the gripping operation is completed, the swing arm 2
0 swings to move the billet b to the delivery position. When the clamp 50 retreats from the chute 1 due to the swing (FIG. 11B), air is supplied to the air cylinder 2 by the signal, and the chute 1 returns.
The hook 6 locks the claw 6 and the next billet b is fed by the return signal. Also hook 4
Is stopped by the pawl 6, the supply of air to the air cylinder 2 is stopped. This stop is carried out by a billet b sending completion signal or the like.

As described above, if the interference between the chute 1 and the clamp 50 is eliminated by the mechanical positional relationship between the hook 4 and the pressing element 55, the positional relationship is not easily disturbed, and a stable clamping operation can be performed. Therefore, the ability to follow the speed is enhanced, and the control is facilitated.

As shown in FIGS. 4 to 7, the swing arm 2
The spline shaft 61 is inserted into the center hole 24 of the
Are inserted and fixed (see FIG. 9). A trunnion (ball spline nut) 62 is axially movably fitted to the spline shaft 61, and the trunnion 62 is rotatably connected to a lower end of a vertically moving arm 63.
The vertical movement arm 63 has a moving body 16 screwed to the ball screw 15 and a vertical frame 1.
When the ball screw 15 rotates, the vertically moving frame 63 moves vertically along the vertical frame 11 through the moving body 16 when the ball screw 15 rotates. Move. By this vertical movement, the spline shaft 61 swings up and down via the trunnion 62,
The swing arm 20 swings. At this time, the vertical movement arm 6
The movement of 3 is performed stably because the moving element 65 is fitted to the rail 64 fixed to the vertical frame 11. The swing angle of the swing arm 20 is determined as appropriate at the position of the receiving position D, such as 120 degrees.

A piston rod 71 of a cylinder 70 fixed to the vertical frame 11 is fixed to the upper end of the vertically moving arm 63. When compressed air is applied to the cylinder 70, the swing arm 20 is moved upward. There is an advantage that the swing arm 20 and the like do not move unnecessarily at the time of adjustment accompanying the size change of the billet b or modification.

This embodiment has the above-described structure. Next, the operation thereof will be described. As shown in FIG. 2, by turning the ball screw 15 with the vertical frame 11 retracted, the swing arm 20 is rotated. Is swung from the solid line to the dashed line to bring the clamp 50 to the receiving position D, and by the operation shown in FIGS.
The billet b is positioned between 1a and 51b and gripped. The operation of the billet supply device B is started when there is a completion signal indicating that the billet b has been inserted into the chute 1. Thereafter, the ball screw 15 is reversed to return the swing arm 20 from the chain line to the solid line state, and then the vertical frame 11 is moved forward (FIGS. 3 and 8) to remove the billet b to be clamped. mixture was allowed to correspond to the transfer position P ₀ or P _1, and sets the billet b in the delivery position P _0, P ₁ by opening the clamp 50.

When the setting is completed, the clamp 50 is moved to the receiving position D by the reverse operation (the clamp 50 is in the open state), and thereafter the same operation is repeated to supply the billet b to the forging press A sequentially. I do.

In the above embodiment, the claw 6 is provided on the chute 1 and the hook 4 is provided on the frame F. However, the hook 4 and the spring 5 are provided on the chute 1 and the claw 6 is provided on the frame F.
To perform the same function.

[0033]

As described above, according to the present invention, the receiving position chute is mechanically retracted in accordance with the operation of the clamp, so that the electric control of the billet supply device and the like can be simplified and the billet receiving time can be reduced. Is shortened.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of one embodiment.

FIG. 2 is a schematic front view of the embodiment.

FIG. 3 is a plan view of a main part of the embodiment in a state where the clamp is moved forward;

FIG. 4 is a left side view of the billet supply device of the embodiment.

FIG. 5 is an enlarged sectional view of a main part of FIG. 4;

FIG. 6 is an enlarged sectional view of a main part of FIG. 2;

FIG. 7 is an enlarged sectional view in which the clamp swings downward.

FIG. 8 is a front view of FIG. 3;

FIG. 9 is a sectional view of a clamp unit.

FIGS. 10A and 10B are clamping action diagrams, wherein FIG.
-X sectional view, (b) is a partially cut front view

11A and 11B are clamping action diagrams, in which FIG.
-X sectional view, (b) is a partially cut front view

FIG. 12 is a schematic operation diagram of a conventional example.

[Explanation of symbols]

A forging press machine B billet feeder C billet feed chute D billet receiving position F frame H base frame P _0, P ₁ billet delivery position a compressed air b billet 1 receiving position chute 2 the air cylinder 3 chute spring 4 hooks 4a hook shaft 4b Locking valve 5 Spring for hook 6 Claw 11 Forward / backward moving frame (vertical frame) 20 Swing arm (Supply arm) 50 Clamp 51a, 51b Clamp claw 55 Presser

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21J 1/00-13/14 B21J 17/00-19/04 B21K 1/00-31/00 B21D 43/00 B21D 43 / 16

Claims (2)

(57) [Claims] 1. The tip of the supply arm 20 is reciprocated between a receiving position D where the billet b is conveyed by the chute C and billet transfer positions P ₀ and P _{1 of the} forging press A, and the supply arm 20 is moved. In the device for gripping the billet b with the clamp 50 at the tip and transferring the billet b from the receiving position D to the transfer position and supplying the billet b to the forging press A, the billet b is received from the chute C in the receiving structure. The part 1 of the receiving position D of the chute C is separated and swingable downward at the separation point, so that the receiving position chute composed of the part 1 can be retracted from the receiving position D and fixed. The hook 4 at a fixed position provided on the frame F is locked to the receiving position chute 1 to maintain the receiving position chute 1 at the receiving position D. A means for unlocking the hook 4 and the receiving position chute 1 is provided on the pump 50, and the receiving position chute 1 is constantly urged downward so as to move the receiving position chute 1 so as not to hinder the movement of the clamp 50. And a means for returning the receiving position chute 1 to the receiving position D after the movement of the clamp 50, and a means for returning the hook 4 to the locking position are provided. Billet receiving structure. 2. A claw 6 is provided on the receiving position chute 1 and the hook 4 is locked to the claw 6 so that the receiving position chute 1 is maintained at the receiving position D and the hook 4 is swingable. Then, the spring 5 urges the hook 4 toward the locking position, and the clamp 50 releases the locking by swinging the hook 4 against the spring 5.
2. A forging press machine according to claim 1, wherein said receiving position chute (1) is provided with a tension spring (3) and an air cylinder (2) for returning the receiving position chute (1). Billet receiving structure.