JP2001138004A - Stock feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the feed cycle by decreasing the moving speed in an out-going passage from a billet receiving position to a billet delivering position, and increasing the moving speed in a returning passage after delivering the billet in a feeder to feed the billet which is a work to a forging press. SOLUTION: A stock feeder to receive the work sliding down from a carry-in chute and feed it to the forging press comprises a shutter to open/shut an outlet of the carry-in chute, a receiving device to receive the work fed from the carry-in chute, a grab to hold the work fed onto a receiving plate provided on the receiving device, and a driving device to reciprocate the grab from a part immediately below the outlet of the carry-in chute to a predetermined delivering position, and the driving device comprises an oscillation member to be oscillated in the longitudinal direction by a crank mechanism, and a rod to connect the oscillation member to the grab, and the crank mechanism decreases the moving speed on the on-going side of the grab and increases the moving speed on the returning side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work material supply device suitable for use in feeding a work material to a forging press.

[0002]

[Prior Art] Material processed by forging press (billet)
Is sent to the mold at any time and automatically processed.
There is an automatic forging press equipped with a transfer device that receives a billet at a predetermined position and carries the billet to a mold. In order to continuously work with this type of automatic forging press, a billet supply device that automatically transfers the billet heated by a heating furnace and conveyed to a predetermined position to a transfer position to a transfer device is required. Become.

Various billet supply devices have already been proposed. For example, 7-1
No. 8455 discloses that a gripper for gripping a material (a billet) is attached to a rack that meshes with a pinion rotated by a servomotor, and the gripper is rotated in a predetermined direction by a servomotor to move the gripper at a predetermined position. A billet charging device for transferring to a billet is described.

Japanese Unexamined Patent Publication No. Hei 10-216894 discloses a material receiving device which is provided with a slider which is guided by a guide rail provided on a table and is movable in a material loading direction, and which holds the material at the tip of the slider. Along with
An apparatus is disclosed in which a rod of a pusher cylinder is connected to a rear portion of the slider, and the pusher cylinder reciprocates a material receiver from a material receiving position to a transfer position.

In this type of apparatus, if the moving speed of the forward path for holding and transferring the material is too high, the posture of the held material may be distorted or fall off.
It needs to be transported at a somewhat slow speed. On the other hand, since the return path to which the material has been delivered is empty, there is no problem even if the moving speed is increased. Therefore, in order to improve the supply efficiency of the processing material, it is only necessary to increase the moving speed of the return path and shorten the time required for reciprocation, that is, the supply cycle.

However, the conventional apparatus has various problems in shortening the material supply cycle. For example, since the apparatus described in Japanese Utility Model Publication No. 7-18455 uses a servomotor, it is possible to set the going speed and the returning speed separately, but an expensive servomotor control device is required. Therefore, there is a problem that the apparatus becomes expensive. Further, Japanese Patent Application Laid-Open No. 10-2
In the apparatus described in Japanese Patent No. 16894, since the transfer is performed by expansion and contraction of the air cylinder, if the speeds of the forward path and the return path are changed, a complicated valve structure is required, and control is difficult.

Further, among the above-mentioned prior arts, in a device driven by a motor, the rotation of the motor is temporarily stopped at the base point of the forward path and the return path, respectively, and the motor is rotated in the opposite direction, or the rotation direction of the motor is maintained constant. In this case, it is necessary to provide a clutch and operate the clutch at the base point to reverse the moving direction. Further, when driven by an air cylinder, it is necessary to reverse the moving direction by switching the valve at the base point of the forward path and the return path in the same manner as described above. As described above, in any case, since the drive must be temporarily stopped at the base point of the forward path and the return path, there is a common problem that the cycle of the transfer operation is lengthened by that much and the efficiency is poor.

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a relatively simple device that makes the moving speed of the return path faster than the speed of the outward path and reciprocates the motor while always rotating it in a fixed direction. It is an object to shorten the supply cycle.

[0009]

In order to solve the above problems, the present invention has the following arrangement. That is, a work material supply device according to the present invention is a work material supply device for receiving a work material sliding down from a carry-in shoot and sending the work material to a forging press, and a shutter for opening and closing an outlet of the carry-in shoot. A receiving device for receiving the processing material supplied from the loading chute, a gripper for holding the processing material supplied on a receiving plate provided in the receiving device, and a gripping device positioned directly below an outlet of the loading chute. A driving device that reciprocates from the portion to a predetermined delivery position, the driving device includes a rocking member that is rocked back and forth by a crank mechanism, and a rod that connects the rocking member and the gripper. The crank mechanism is characterized in that the moving speed of the gripper on the forward path is slow, and the moving speed on the return path is high.

According to the present invention, the gripper moves at a relatively low speed so that the material is supplied appropriately on the outward path where the material is held, and on the return path in an empty state where the material is not held. Since it is moved at a high speed, the efficiency can be improved by shortening the supply cycle. Since a crank mechanism is used as a drive source, the drive source is structurally simple and robust.

If the shutter of the carry-in chute is kept open, the workpiece may slide down and cause trouble even when the grasping tool is advanced to the delivery position side. It is necessary to always close the shutter when it is not located immediately below the part, and open it only when the gripper returns to the predetermined position. For this purpose, the shutter is always biased in the closing direction,
Preferably, the gripper is forcibly opened by a dog attached to the gripper when the gripper returns. By doing so, the opening / closing mechanism of the shutter can be simplified, and the timing of the opening / closing operation can be easily adjusted.

[0012] Further, the swinging member has one end pivotally supported by a base, the other end connected to a frame of a gripper by a rod, and an elongated hole formed in an intermediate portion thereof. The sliding member attached to the tip of the crank is slidably fitted into the elongated hole, and is configured to swing by the rotation of the crank. It can be done easily,
Since the sliding member moves up and down by the rotation of the crank and the swinging member swings, the gripper can be reciprocated without stopping the motor.

[0013] Further, by providing a bypass below the outlet of the carry-in chute so that the processing material supplied from the carry-in chute can be discharged to the outside,
When trouble occurs in any process of the forging press line, the processed material can be discharged to the outside without sending it to the previous process, so avoiding the trouble of equipment by forcibly feeding the material It becomes possible.

On the other hand, if a trouble occurs in any step of the forging press, the operation of the forging press is immediately stopped. At this time, if the motor is reversed and the swinging member is returned to the driving start position, the gripping is performed. The tool is located in the receiving position in an open state capable of receiving the workpiece, the shutter is opened,
In addition, since the receiving device is configured to open the bypass, the processing material sequentially supplied from the loading chute can be discharged to the outside through the bypass. Does not occur. In addition, in this state, when the trouble is solved and the automatic operation is restarted, the safety check (confirmation that the restart condition is satisfied) is easy and the drive is started as it is. As a result, the transfer of the work material can be started, so that it is not necessary to perform useless work such as blank press.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described with reference to the drawings. The work material supply device 1 is installed between a carry-in chute S for sliding down a work material (hereinafter described as an example of a billet) B heated in a heating furnace and a transfer device H of an automatic forging press. A base 2 for supporting a main body of a processing material supply device (hereinafter abbreviated as “supply device”) 1 and a base 3 for a drive device 5 are installed on the floor at a predetermined interval.

The loading chute S is formed as a tube having a circular cross section, and a shutter 5 for opening and closing the opening of the chute is provided at the lower end thereof. The shutter 5 is, as shown in FIGS. 1 and 4, a shutter cylinder (air cylinder).
A vertical frame 8 is attached to the distal end of the extension rod 6 connected to the piston rod 71 of 7 by a connecting member 72 (free coupling), and protrudes horizontally from the frame. The lower end portion 8a of the frame 8 projects below the bottom surface of the shutter, and forms an engagement portion with which a dog 30 described later is engaged. The shutter cylinder 7 and the bearing 9 supporting the intermediate portion of the extension rod 6 are attached to a plate 10 fixed to the base 2.

The gripper frame 1 is located below the shutter 5.
5 are provided. As shown in FIG. 6, the gripper frame 15 is formed in a substantially T-shape in plan view, and bushed through holes 16a provided in arm portions 16 extending rightward and leftward. 18 is inserted, and is supported movably back and forth along the guide rod. The guide rods 18 are attached to front and rear frames 19, 19 erected on the base 2.

A gripper 20 is attached to the front end of the gripper frame 15. The gripper 20 includes a gripper opening / closing cylinder 21 and a pair of left and right gripping claws 25 provided on the front side of the cylinder. The gripper claw 25 of the gripper 20 has a grip portion 25a having a V-shaped concave portion at the tip, and an intermediate portion thereof is attached to a front frame 24 of the gripper so as to be rotatable left and right with a shaft 26. . The rear end of the gripper 25 is connected to the link 27 by a pin 28.
The base of the link is attached to the piston rod 21d of the gripper opening / closing cylinder 21 with a pin 29. The gripper opening / closing cylinder 21 includes a piston 2
A spring 21b for biasing 1a in a retreating direction,
A stopper 21c for regulating the moving range of the piston 21a is provided. A dog 30 is provided at a rear end position of the gripping claw 25 on the center line of the gripping tool 20 so as to protrude upward.

The gripper 20 is always held by a spring 21
b exerts a force in the direction in which the piston rod 21d of the cylinder 21 is retracted.
The distal ends of the grippers 25 receive forces in the direction away from each other, and the gripper 20 is kept open. On the other hand, when air is supplied to the rear portion of the piston 21a of the cylinder 21, the piston advances, so that the tips of the gripping claws 25, 25 rotate in a direction approaching each other, and the gripping tool 20 is closed. At this time, if the billet B exists in the space between the two claws, the billet is firmly grasped.

A connecting rod 32 is connected to the rear part of the gripper 20 by a pin 31 so as to be rotatable up and down. The rear end of the connecting rod 32 is connected to the upper end of the swing member 35 by a pin 34. The swing member 35 is provided with an elongated hole 36 at an intermediate portion in the vertical direction, and a lower end portion is rotatably attached to a receiving member 38 of the base 3 with a pin 37. This swing member 3
A slide 40 is slidably fitted in the elongated hole 36 along the elongated hole. The slider 40 is rotatably attached to a crankshaft 42a fixed to the crank 42 as shown in FIG.
Bearing 4 attached to the frame 3 and fixed to the frame 3
1, 41 are supported. The rotating shaft 44 is connected via a coupling 47 to an output shaft of a speed reducer 46 connected to a rotating shaft of a motor 45 as a power source.

[0021] Immediately below the lower end opening of the carry-in chute S, a receiving device 50 for receiving a billet falling from the opening is provided, and a bypass 59 for discharging to the outside is provided if necessary. A receiving plate 51 also serving as a shutter is provided at the receiving port. As shown in FIGS. 10 and 11, a support shaft 52 is attached to the lower surface of the receiving plate 51. The support shaft 52 is connected to a rod 54a of a bypass cylinder 54 via a universal joint 53. 55 is attached so as to be able to move up and down slightly. Around the support shaft 52, a cushioning spring 57 that constantly urges the receiving plate 51 in the lifting direction is provided. The bypass cylinder 54 is constantly urged in the extending direction, and the receiving plate 51 closes the entrance of the bypass 59. However, if an abnormality occurs in the press line process, air is supplied by a command from the control device, The rod contracts and moves the receiving plate 51 to the left in FIG. Then, the entrance of the bypass 59 is opened, so that the billet B falling from the loading chute S is discharged to the outside through the bypass 59 without being received by the receiving plate 51.

Next, the operation of the supply device 1 will be described. In the initial state of waiting for the billet B to slide down from the loading chute S, the gripper 20 is located at the billet receiving position X facing the exit of the loading chute S. At this time, the shutter 5 is pushed by the dog 30 of the gripper 20 and is located at the left end in FIG. 1, and the opening of the loading chute is in an open state. In this state, the billet that has slipped down in the carry-in chute is received by the receiving plate 51 immediately below the opening of the carry-in chute. Then grasp 2
0 sandwiches the billet from the left and right, and then transfers it to a predetermined delivery position Y. At this time, the shutter 5 advances rightward in FIG. 1 by the urging force of the air cylinder, and closes the opening of the carry-in chute S.

When the gripper 20 reaches the delivery position (transfer device receiving position) Y, the chuck of the transfer device grips the billet, the gripper 20 opens, and the billet is delivered to the transfer device of the automatic press. The delivered billet is supplied to a die of an automatic press and processed. When the above delivery is completed, gripper 2
1 is moved to the left in FIG. 1 while the gripper 20 is open, and the gripper 20 returns to the receiving position X again. At this time, the dog 30 of the gripper 20 engages with the shutter frame lower portion 8a and forcibly forces it. As a result, the shutter 5 is opened and a new billet is supplied onto the receiving plate 51. Hereinafter, the same operation is repeated.

In the supply device 1, the gripper 20 reciprocates back and forth through a crank device.
That is, the rotation of the motor 45 is controlled by the reduction gear 46 and the rotation shaft 44.
To the crank 42 to rotate the crank. The end of the crank 42 has a long hole 3 of the swinging member 35.
Since the slider 40 is slidably fitted to the slider 6, the slider reciprocates up and down in the elongated hole with the rotation of the crank 42 and swings the swing member 35 back and forth. Move. In this case, the crank 42 rotates clockwise in FIG. 1 (direction of arrow Z). When the swing member is swung in the direction of arrow A (return side) in FIG. 1 during this rotation, the slider 40 is positioned at the lower position of the elongated hole, that is, the fulcrum 3 of the swing member 35.
7, the swinging member is largely swung by the movement even if the moving distance in the front-rear direction is short. For this reason, the return speed increases. When the swing member 35 swings rightward in FIG. 1 (in the direction opposite to the arrow A), the slider 40 moves back and forth at a position above the elongated hole 36, that is, at a position far from the fulcrum of the swing member. The forward speed of the gripper 25 decreases.

FIG. 12 is a graph showing the relationship between the angle of the crank mechanism and the moving distance. In this way, the crank mechanism and the swinging member are effectively used, and among the rotation angles of the crank, the rotation angle on the outward path is increased and the rotation angle on the return path is reduced, so that the speed is somewhat slow on the outward path. It is possible to avoid troubles such as moving the billet so that the posture of the billet collapses, and to return the billet in an empty state as quickly as possible, thereby improving efficiency.

Further, as shown in FIG. 12, since the feed amount is small with respect to the phase of the crank angle near the limit of the outward path, the gripper is opened and the billet is delivered (T1).
Can be secured for a long time. Similarly, the same applies to the return route, in which the billet falls and closes the gripper (T2)
Therefore, the reciprocating operation can be performed while the motor is rotating, and the working efficiency can be improved.

When the billet is received, if any abnormality occurs in the automatic press, the press process is immediately stopped. At this time, the bypass air cylinder 54 contracts and the receiving plate 51 is moved to the receiving position X. To the left side of FIG. 1 and open the bypass inlet. When the motor 45 is reversed to return the swinging member 35 to the drive start position, the gripper 20 returns to the receiving position, the shutter of the loading chute opens, and the grippers 25, 2 are opened.
5 opens. For this reason, not only does the billet B grasped fall to the bypass, but the billet B sequentially falling from the carry-in chute S falls as it is, and is discharged to the outside through the bypass 59. This prevents accidents in which billets are forcibly supplied to a stopped automatic press.

As described above, when an abnormality occurs in the press line process and the press device is stopped, the billet to be supplied to the press device is discharged to the outside through the bypass line. Troubles caused by the supply can be avoided. The operations of the air cylinders, the motors, and the like are automatically controlled, and the billet discharging operation is performed in conjunction with the stop of the automatic press that is a subsequent device. May be performed by a manual switch operation.

Although the apparatus shown in the figure uses a general-purpose motor, it is inexpensive. However, the use of a servomotor enables more complicated speed adjustment. In the above description, the gripper 20 for holding the material from the left and right is adopted as a device for holding the processed material. However, the point is that it is only necessary to be able to hold and transfer the material well, Alternatively, a holding device of another mechanism, for example, a cup-type holder can be adopted.

[0030]

As is apparent from the above description, the working material supply apparatus according to the present invention makes use of the crank mechanism and the swinging member effectively to make the forward movement speed for transferring the working material relatively slow. Since the speed at which the material is delivered and returned in an empty state can be increased, the supply cycle can be shortened. In this apparatus, the transfer speed is adjusted using a simple crank mechanism, so that the structure is simple and robust.

[Brief description of the drawings]

FIG. 1 is a front view of a processing material supply device.

FIG. 2 is a plan view of a main part of the processing material supply device.

FIG. 3 is a sectional view of a main part viewed from an arrow P in FIG. 1;

FIG. 4 is a plan view of a shutter.

FIG. 5 is a sectional view of a gripping tool.

FIG. 6 is a plan view of the gripper.

FIG. 7 is a plan view of the gripper in an open state.

FIG. 8 is a plan view showing a state in which a gripper holds a billet.

FIGS. 9A and 9B are a left side view and a plan view of a receiving plate supporting portion. FIGS.
It is.

FIG. 10 is a front view of a receiving plate supporting portion.

11 is a view as viewed in the direction of the arrow Q in FIG. 10;

FIG. 12 is a graph showing an operation of the crank mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 work material supply device 2 base 3 base 5 shutter 7 shutter cylinder 15 gripper frame 20 gripper 25 gripper 30 dog 32 connecting rod 35 rocking member 36 elongated hole 40 slider 42 crank 45 motor 46 reducer B Billet (processed material) S Loading chute

Claims (6)

[Claims] An apparatus for supplying a work material which receives a work material slid down from a carry-in shoot and sends the work material to a forging press, comprising a shutter for opening and closing an outlet of the carry-in shoot, and a supply from the carry-in chute. A receiving device for receiving the processed material, a gripper for holding the processed material supplied on a receiving plate provided in the receiving device, and a gripper from a position directly below an outlet of the loading chute to a predetermined delivery position. A driving device for reciprocating movement, the driving device,
A swinging member that is swung back and forth by a crank mechanism, and a rod that connects the swinging member to the gripper, wherein the crank mechanism has a slow moving speed of the gripper on the forward path and a movement on the backward path. A processing material supply device characterized in that the speed is increased. 2. A shutter for opening and closing an outlet of a loading chute, wherein the shutter is closed when the gripper advances to a delivery position side, and is opened by a dog attached to the gripper when the gripper returns. Claim 1
2. A processing material supply device according to claim 1. 3. The swing member has one end pivotally supported by a base, the other end connected to a frame of a gripper via a rod, and a crank mechanism provided in an elongated hole formed in an intermediate portion. The processing material supply device according to claim 1, wherein the sliding member attached to the workpiece is slidably fitted. 4. A bypass for discharging a processing material supplied from the carry-in chute to the outside is provided below an outlet of the carry-in chute, and the receiving device also serves as a shutter for opening and closing the entrance of the bypass. The processing material supply device according to claim 1. 5. When a trouble occurs in any of the steps of the forging press and the operation is stopped, the swinging member returns to the driving start position, and the gripper is moved to the receiving position in an open state capable of receiving the work material. The processing material supply device according to claim 4, wherein the shutter is opened, and the receiving device is configured to open the bypass. 6. The processing material supply device according to claim 1, wherein the receiving plate of the receiving device is supported by a spring that buffers an impact due to a drop of the processing material.