JP2005279675A - Transfer feeder in forging press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transfer feeder in a forging press, which transfer feeder can arrange the configuration of the whole press line to be further efficient, and can carry a workpiece between dies in the accurately positioned state, and can simply and quickly carry out the change and the fine adjustment of the operation timing of a feed bar. <P>SOLUTION: The transfer feeder comprises a front feed bar 1 arranged in front of a multi-process die in the forging press, a rear feed bar 2 arranged at the rear of the multi-process die, and an operating unit S for operating the front and rear feed bars 1, 2. The operating unit S comprises a front feed bar operating section 10 for operating the front feed bar 1, and a rear feed bar operating section 20 which can independently operating the rear feed bar 2 with respect to the front feed bar 1. The rear feed bar operating section 20 is arranged at the rear of the front feed bar operating section 10 so as to be separated from the front feed bar operating section 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a transfer feeder in a forging press. The transfer feeder is a multi-process die that is operated by three-dimensional motion of clamp, lift, advance, down, unclamp and return, one feed bar provided before and after the multi-step die in the press. It is a device that conveys materials (forged products) between them. Conveying claws are provided at corresponding positions on the opposing surfaces of the pair of front and rear feed bars of the transfer feeder. When the pair of front and rear feed bars approach, that is, when they are clamped, the opposing conveying claws Can support the workpiece firmly.
The present invention relates to a transfer feeder in a forging press equipped with a feed bar.

  In a transfer feeder of a forging press, when a pair of front and rear feed bars approach each other, each feed bar has a feed claw on the other feed to securely hold the product between a pair of opposite feed claws. There is provided an urging means such as a spring that presses against the conveyance claws provided on the bar, in other words, each conveyance claw against the workpiece.

  However, in the pair of conveyance claws, if the urging force of the urging means that presses each conveyance claw against the workpiece is always the same, when the workpiece is unclamped, the workpiece is positioned between the pair of front and rear feed bars, In other words, it can be placed in the center of the mold in the next process, but if scale or mold lubricant adheres to or enters the biasing means, the scale becomes the operating resistance of the biasing means, The balance of the urging force of the urging means is lost. Then, the position of the workpiece placed on the mold is shifted to either the front side or the rear side, and the workability of the workpiece in forging deteriorates. If the workability of the work is deteriorated, the shape changes, and the work cannot be clamped well by the conveying claw, which causes a misfeed.

As a technique for solving such a problem, the following technique has been developed (conventional example 1: Patent Document 1).
As shown in FIG. 7, the technology of Conventional Example 1 is a transfer bar that is mounted on an automatic forging press, moves two front and rear transfer bars 101A and 101B three-dimensionally, grabs a workpiece, lifts it, and transports it to the next process position. This is a technology related to the workpiece gripping device, and means for converting the rotation of the pair of eccentric cams 102A and 102B into the two forward and backward transfer bars 101A and 101B, and the forward and backward movement of the transfer bars 101A and 101B. , So that the travel limit to the inside of one transfer bar 101B is smaller than the travel limit to the inside of the other transfer bar 101A, in other words, to the inside of the transfer bar 101B. Stops moving earlier than the inward movement of the transfer bar 101A, and the outward movement of the transfer bar 101B moves out of the transfer bar 101A. It is adjusted to start moving later than moving to the side. A spring 116 that biases the gripper 112A is provided only on the other transfer bar 101A.
For this reason, when the work is released, first, the movement of one transfer bar 101B is stopped and only the other transfer bar 101A moves outward. At this time, since the gripper 112A of the other transfer bar 101A is urged toward the gripper 112B of the transfer bar 101B by the spring 116, the work is held while being positioned by the gripper 112B. With the movement of the other transfer bar 101A to the outside, the urging force by the spring 116 decreases, and after the urging force by the spring 116 disappears, the one transfer bar 101B starts moving. For this reason, the workpiece can be arranged in the mold with one end thereof arranged at the reference position, that is, the position K.

JP-A-6-71361

  However, if the mold is changed to change the workpiece to be manufactured, the operation timing of the transfer bars 101A and 101B must naturally be changed. However, in the technique of the conventional example 1, since the operation timing and movement amount of the transfer bars 101A and 101B are controlled by the two eccentric cams 102A and 102B, the eccentric cams 102A and 102B themselves are used to change the operation timing and the like. Since the number of man-hours required for changing the workpiece increases and the time required for changing the workpiece also increases, the work efficiency decreases. In addition, once the eccentric cams 102A and 102B are attached, the operation timing and the like cannot be finely adjusted, so if a deviation in the operation timing or the like occurs during the operation of the forging press, the eccentric cams 102A and 102B Exchange or eccentric cams 102A and 102B must be removed and adjusted, resulting in a reduction in production efficiency.

  Further, in order to position the workpiece at the position K, the rotation of the pair of eccentric cams 102A and 102B must be completely synchronized, but the pair of shafts to which the pair of eccentric cams 102A and 102B are attached are completely It is difficult to rotate in a synchronized state. For this reason, it is realistic to drive the pair of shafts by the same power source, but in this case, a mechanism or the like for connecting the two is required between the pair of shafts, and the structure of the device becomes complicated. There is a risk that the apparatus will be enlarged. If a mechanism for connecting a pair of shafts or the like is required, the arrangement of the pair of shafts, in other words, a device for operating the transfer bars 101A and 101B cannot be freely arranged. It will be restricted.

  In view of the above circumstances, the present invention makes it possible to arrange the entire press line in a more efficient manner, to transport between molds while the workpiece is accurately positioned, and to change or fine-tune the operation timing of the feed bar. It is an object of the present invention to provide a transfer feeder in a forging press that can be carried out easily and in a short time.

A transfer feeder in a forging press according to a first aspect of the present invention includes a front feed bar disposed in front of a multi-step mold in the forging press, a rear feed bar disposed in the rear, and an operating device that operates the front and rear feed bars. A feeder, wherein the operating device operates a front feed bar operating device that operates the front feed bar, and a rear feed bar operating device that can operate the rear feed bar independently of the front feed bar. And the rear feed bar actuating device is arranged behind the front feed bar actuating device and at a position separated from the front feed bar actuating device.
The transfer feeder in the forging press according to the second invention is the transfer feeder according to the first invention, wherein the front and rear feed bars are arranged in parallel to each other, and the front and rear feed bar actuating devices move the front and rear feed bars to the other feed bar. Each clamp mechanism includes a ball screw mechanism having a screw shaft, and the screw shaft of the ball screw mechanism has a feed bar on which the ball screw mechanism operates. It is arrange | positioned so that it may orthogonally cross with the axial direction of this.
In the first or second invention, the transfer feeder in the forging press according to the third aspect of the present invention is the front and rear supporting the workpiece by sandwiching the workpiece from the front and rear when the front and rear feed bars approach the mutually facing surfaces of the front and rear feed bars. Each of the front and rear transport claws is fixed to the rear feed bar, and the front transport claw is connected to the front feed bar and the rear transport claw. When the front and rear feed bars are separated from each other from a state in which the front and rear feed bars are close to each other, provided with a biasing means for biasing the front conveying claw toward the rear feed bar. In the above, after the urging force applied to the workpiece from the urging means via the front conveying claw stops acting on the workpiece, Characterized in that it is adjusted so as to move in the direction away from the feed bar.
In the transfer feeder in the forging press of the fourth invention, in the first or second invention, the front and rear conveying members that support the workpiece when the front and rear feed bars approach the mutually opposing surfaces of the front and rear feed bars. A pair of gripping claws provided to be movable toward and away from each other along the left-right direction of the forging press, and a claw actuating member for moving the pair of gripping claws closer to and away from each other. It is characterized by comprising.

According to the first aspect of the invention, the front feed bar actuating device and the rear feed bar actuating device are arranged at positions separated from each other, so that a space can be provided between the front and rear feed bar actuating devices. For this reason, when the forging press is viewed from the side, the feed bar actuating device does not overlap with the charging device or discharging device on the line where the workpiece is conveyed. The lubrication state can be easily confirmed by an operator visually. In addition, since the degree of freedom of the layout of the front and rear feed bar actuating devices is increased, the degree of freedom of the position where the charging device and the discharging device arranged on the side of the forging press are also increased, and the entire press line is configured. A more efficient arrangement can be obtained. In addition, since the rear feed bar can be operated independently of the operating state of the front feed bar by the rear feed bar actuating device, the timing for clamping and unclamping the workpiece, the workpiece and each feed bar The contact timing can be freely adjusted. Therefore, if one of the feed bars is used as a workpiece positioning feed bar, the workpiece positioning accuracy can be increased.
According to the second invention, since the clamp mechanism for moving the front and rear feed bars toward and away from the other feed bar is a ball screw mechanism, each feed bar can be accurately moved, and each feed bar The position and timing of contact with can be finely adjusted.
According to the third aspect of the invention, since the front conveying claw is urged toward the rear conveying claw by the urging means, if the work is clamped by the front and rear feed bars, the front conveying claw is urged by the urging force of the urging means. The claw presses the work against the rear transfer claw. Therefore, it is possible to hold the work firmly between the front and rear conveying claws. When the front and rear feed bars are separated from each other, that is, when the work is unclamped, the rear feed bar moves after the urging force that presses the work against the rear conveying claw by the urging means disappears. By the way, since the rear conveyance claw is fixed to the rear feed bar, when the rear feed bar moves, no force is applied to the workpiece. For this reason, the workpiece does not move when the front and rear feed bars move away from the workpiece, and in other words, the position where the workpiece is in contact with the rear conveyance claw, in other words, the position where the workpiece is placed when the rear feed bar moves. It can be placed as it is. That is, since the workpiece can be positioned by the rear conveying claw of the rear feed bar, the positioning accuracy of the workpiece can be increased.
According to the fourth aspect of the present invention, the workpiece can be gripped if the pair of gripping claws of the conveying member are brought close by the claw actuating member when the front and rear feed bars approach. In addition, since the pair of gripping claws contact the workpiece from the left and right direction of the forging press with respect to the workpiece, no force is applied in the front-rear direction against the workpiece even if the pair of gripping claws moves. The positioning accuracy of the workpiece in the direction can be increased.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of a transfer feeder according to the present invention. 2 is a view taken along the line II-II in FIG. FIG. 3 is a schematic explanatory view of the front feed bar actuating device 10, (A) is a schematic side view, (B) is a schematic sectional view taken along line BB of (A), and (C) is (A It is a CC sectional schematic sectional view of). FIG. 4 is an explanatory diagram of an operation of clamping the workpiece W by the clamping device 30, and FIG. 5 is an explanatory diagram of an operation of unclamping the workpiece W by the clamping device 30.

1 and 2, reference numeral C indicates four press columns, reference numeral 1 indicates a front feed bar, and reference numeral 2 indicates a rear feed bar. The front feed bar 1 and the rear feed bar 2 are supported by the feed bar actuating device S so that the axial directions thereof are parallel to each other.
The feed bar actuating device S supports both ends of the front feed bar 1 and supports a pair of front feed bar actuating devices 10 and 10 controlled to operate in synchronization with each other and both ends of the rear feed bar 2. Are supported by a pair of rear feed bar actuating devices 20, 20 controlled to operate synchronously.
The pair of rear feed bar actuating devices 20 and 20 are positioned rearward (rightward in FIG. 1) and spaced apart from the pair of front feed bar actuating devices 10 with the workpiece conveying line L in the forging press interposed therebetween. Is arranged. That is, the corresponding front and rear feed bar actuating devices 10 and 20 are arranged so that there is a gap between them.

For this reason, when the forging press is viewed from the side (upper or lower in FIG. 1), the feed bar actuating device S, that is, the front and rear feed bar actuating devices 10 and 20 are arranged on the workpiece transfer line L. Therefore, the feed bar actuating device S can be prevented from overlapping with the charging device or the discharging device. Then, when the forging press is viewed from the side, the operator can see through to the inside of the forging press, so that the operator can easily visually check the workpiece conveyance state and the mold M lubrication state in the forging press. Can be confirmed.
Further, since the front and rear feed bar operating devices 10 and 20 for operating the front and rear feed bars 1 and 2 are provided independently, there is no need to provide a member for connecting the front and rear feed bars 1 and 2. The space occupied by the feed bar actuator S can be reduced. For this reason, the freedom degree of the position which arrange | positions the charging apparatus and discharge apparatus arrange | positioned at the side of a forge press becomes large, and can comprise the structure of the whole press line compactly and more efficient arrangement | positioning.

Next, the front and rear feed bar actuators 10 and 20 will be described.
Since feed bar actuators 10 and 20 have substantially the same configuration, only front feed bar actuator 10 will be described below.

As shown in FIGS. 1 to 3, the front feed bar operating device 10 includes a base frame 11 fixed to a column C of a forging press. The base frame 11 is provided with an elevating frame 17 provided with a clamp mechanism 30 to be described later. The elevating frame 17 is raised and lowered via a guide rail 11a arranged on the base frame 11 along the vertical direction. It is installed freely.
As shown in FIG. 3, the base frame 11 is provided with an elevating screw type moving mechanism 12 for moving the elevating frame 17 up and down. The elevating screw type moving mechanism 12 includes an elevating screw shaft 12a whose axial direction is provided along the vertical direction, an elevating nut member 12b screwed to the elevating screw shaft 12a, and an elevating screw shaft. A lifting / lowering servomotor 12c for rotating 12a is provided, and a lifting frame 17 is fixed to the lifting nut member 12b.
Therefore, when the lifting servo motor 12c is operated, the lifting frame 17 moves up and down along the lifting screw shaft 12a together with the lifting nut member 12b, so the front feed bar 1 also moves up and down together with the lifting frame 17. .

As shown in FIG. 3, the lifting frame 17 is provided with a clamp mechanism 30. The clamp mechanism 30 is provided with an advance frame 41 that holds the front feed bar 1 movably along its axial direction. The advance frame 41 is attached to a guide rail 30a disposed so as to be horizontal and perpendicular to the axial direction of the front feed bar 1 so as to be movable along the guide rail 30a.
Further, the elevating frame 17 is provided with a clamp screw type moving mechanism 32 for moving the advance frame 41 along the guide rail 30a. The clamping screw type moving mechanism 32 includes a clamping screw shaft 32a having an axial direction parallel to the guide rail 30a, a clamping nut member 32b screwed to the clamping screw shaft 32a, and a clamping screw. The clamp servomotor 32c rotates the shaft 32a, and the advance frame 41 is fixed to the clamp nut member 32b.
Therefore, when the servo motor 32c for clamping is operated, the advance frame 41 moves along the screw shaft 32a for clamping together with the nut member 32b for clamping, so that the front feed bar 1 and the rear feed bar 2 together with the advance frame 41 are moved. It approaches and separates toward.

Further, as shown in FIG. 3, the advance frame 41 is provided with an advance screw shaft 42a of an advance screw type moving mechanism 42 for moving the front feed bar 1 in parallel and horizontally with its axial direction. An advance nut member 42b is screwed onto the advance screw shaft 42a. The advance nut member 42b is connected to the base end of the front feed bar 1 through a connecting member 43. An advance servo motor 42c is attached to the base end of the advance screw shaft 42a.
For this reason, when the advance servo motor 42c is operated, the advance nut member 42b moves along the advance screw shaft 42a, so that the front feed bar 1 is moved back and forth together with the advance nut member 42b. .

  As shown in FIG. 1, conveying claws 1 a and 2 a for gripping materials are attached to the surfaces of the feed bars 1 and 2 facing each other in the number corresponding to the number of dies in the multi-step mold. Of the conveying claws 1 a and 2 a, the rear conveying claw 2 a provided on the rear feed bar 2 is fixed to the rear feed bar 2. On the other hand, the front conveyance claw 1a provided on the front feed bar 1 is provided so as to be able to advance and retreat toward the rear conveyance claw 2a. It is urged toward the rear conveying claw 2a.

  With the configuration as described above, the front and rear feed bars 1 and 2 are moved together with the advance frame 41 by moving the clamping screw type moving mechanism 32 of the front feed bar actuating device 10 and the rear feed bar actuating device 20, respectively. The workpieces on the mold can be sandwiched and supported by the front and rear transport claws 1a and 2a. Next, when the lifting and lowering frame 17 is lifted by simultaneously operating the lifting and lowering screw type moving mechanism 12 of the front feed bar operating device 10 and the rear feed bar operating device 20, the front and rear feed bars 1 and 2 sandwich the workpiece. Move forward with your upper body. Then, if the advance servo motor 42c of the front feed bar actuating device 10 and the rear feed bar actuating device 20 is actuated simultaneously, the front and rear feed bars 1 and 2 together with the advance nut member 42b move forward, If the front and rear feed bars 1 and 2 are separated by the clamping screw type moving mechanism 32 after the lifting frame 17 is lowered by the raising and lowering screw type moving mechanism 12, the workpiece can be moved to the mold in the next process. it can.

And the feed bar actuator S of the transfer feeder of this embodiment is provided with the front feed bar actuator 10 and the rear feed bar actuator 20 separately and can be operated independently. Therefore, if the operation of each screw type moving mechanism of the front and rear feed bar actuating devices 10 and 20 is adjusted by a control means (not shown), the timing at which each screw type moving mechanism is operated can be freely adjusted. Then, when the front and rear feed bars 1 and 2 clamp and unclamp the workpiece, the front and rear feed bars 1 and 2 are lifted down and advanced and returned at exactly the same timing. The bars 1 and 2 can be moved closer to and away from the workpiece at different timings.
For example, if the front and rear feed bars 1 and 2 are moved as follows, the work can be reliably supported by the front and rear transport claws 1a and 2a, and the work is placed on the next mold. , Can be placed in an accurately positioned state.

As shown in FIG. 4, when the front and rear feed bars 1 and 2 are separated, the front and rear transport claws 1 a and 2 a are the same distance from the work W or the rear transport claws 2 a from the work W. The screw-type moving mechanism 32 for clamping the front and rear feed bar actuating devices 10 and 20 is adjusted so that the distance A is shorter than the distance C from the workpiece W of the front conveying claw 1a. Further, the urging means 1c is adjusted so that the distance B is between the front feed bar 1 and the front conveying claw 1a (FIG. 4A).
When the clamping screw type moving mechanism 32 of the front and rear feed bar actuators 10 and 20 is moved from this state, the front and rear conveying claws 1a and 2a come into contact with the workpiece W (FIG. 4B). The rear feed bar 2 stops when the amount of movement becomes the distance A, that is, when the rear conveyance claw 2a contacts the workpiece W.
On the other hand, the front feed bar 1 continues to move even after the front conveyance claw 1a contacts the workpiece W, and stops when the distance between the front feed bar 1 and the front conveyance claw 1a reaches the distance D. Thus, the clamping operation is completed (FIG. 4C). Then, since the urging means 1c is in a contracted state, the front conveyance claw 1a is urged toward the rear conveyance claw 2a and the front and rear conveyance claws 1a provided on the front and rear feed bars 1 and 2 are used. , 2a can securely hold and hold the workpiece W.

  As shown in FIG. 5, when the workpiece W is placed on the mold M in the next process in a state where the workpiece W is clamped by the front and rear conveying claws 1a and 2a of the front and rear feed bars 1 and 2 (see FIG. 5). 5 (A)), first, the front feed bar 1 moves away from the workpiece W. Then, the force with which the front conveying claw 1a is urged toward the rear conveying claw 2a by the urging means 1c changes according to the distance between the front feed bar 1 and the workpiece W, and the urging force gradually increases. become weak. During this time, the rear feed bar 2 is held so as not to move, and the rear conveying claw 2a is fixed to the rear feed bar 2, so that the front feed bar 1 is separated from the workpiece W. However, the workpiece W does not move. In other words, while the front feed bar 1 is separated from the workpiece W, the workpiece W is held in a state where one end (right end in FIG. 5) is positioned by the rear conveyance claw 2a of the rear feed bar 2.

Eventually, when the front feed bar 1 moves to a position where the distance between the front feed bar 1 and the front conveying claw 1a is the distance B (FIG. 5B), the rear feed bar 2 is also separated from the workpiece W. Start moving. At this time, since the distance B is between the front feed bar 1 and the front conveying claw 1a, no biasing force is applied to the workpiece W from the biasing means 1c. Since the rear conveying claw 2a is fixed to the rear feed bar 2, no force is applied to the workpiece W when the rear feed bar 2 moves. For this reason, the workpiece W does not move when the front and rear feed bars 1 and 2 are separated from the workpiece W, and the workpiece W can be arranged as it is at the position where the rear feed bar 2 is moved.
Therefore, when the workpiece W is unclamped, the workpiece W can be positioned by the rear conveying claw 2a of the rear feed bar 2 by moving the front and rear feed bars 1, 2 as described above. The positioning accuracy can be increased. And, when the work W in which a gap is formed between the molds is transported when placed on the mold, the positioning accuracy strongly affects the quality of the molded product. This is particularly suitable when the workpiece W is manufactured.

Further, since the front and rear feed bars 1 and 2 are actuated by a clamping screw type moving mechanism 32 constituted by a ball screw mechanism, the front and rear feed bars 1 and 2 start and stop moving and start moving. The timing to perform can be moved accurately. The position and timing at which the front and rear feed bars 1 and 2 come into contact with the workpiece W can be changed only by adjusting the operating amount of the clamping servo motor 32c of the clamping screw type moving mechanism 32. The position where the feed bars 1 and 2 are in contact with the workpiece W can be adjusted easily and in a short time.
Therefore, even when the workpiece W is changed, it is only necessary to change the operation start position, the operation amount, and the operation timing of the clamping servo motor 32c of the clamping screw type moving mechanism 32. Work man-hours can be reduced and work efficiency can be improved.
In addition, since the operation start position of the clamping servomotor 32c of the clamping screw type moving mechanism 32 can be finely adjusted, even when the operation timing is shifted during the operation of the forging press, Since it can be adjusted easily and in a short time, the production efficiency can be improved.

  The following feed members 1 and 2 may be provided with the following transport members instead of the transport claws 1a and 2a. In the following, the conveying member provided in the front feed bar 1 will be described as a representative.

FIG. 6 is an enlarged schematic explanatory view of the conveying member 3. In the same figure, the code | symbol 3 has shown the member for conveyance provided in the surface facing the rear feed bar 2 in the front feed bar 1. FIG. The conveying member 3 is provided with a pair of gripping claws 4a and 4b whose base ends are swingable along the axial direction of the front feed bar 1, in other words, along the horizontal direction of the forging press. The base end portion of the pair of grip claws 4a and 4b is provided with a connecting portion 5 extending toward the base end of the other grip claws, and the connection portions 5 of the pair of grip claws 4a and 4b are connected to each other. It is attached by a shaft 6. The connecting shaft 6 is connected to a piston 7 a of a hydraulic cylinder 7 provided on the front feed bar 1. The first oil chamber R1 and the second oil chamber R2 of the hydraulic cylinder 7 are communicated with the hydraulic pump P and the tank T via the switching valve SV.
For this reason, if the switching valve SV is switched to connect the hydraulic pump P to the first oil chamber R1, the piston 7a of the hydraulic cylinder 7 can be moved in the direction of the pair of gripping claws 4a and 4b (downward in FIG. 6). it can. Then, the pair of gripping claws 4a and 4b move with their base ends as fulcrums so that their tips are separated from each other. Conversely, if the switching valve SV is switched to connect the hydraulic pump P to the second oil chamber R2, the piston 7a of the hydraulic cylinder 7 is moved away from the pair of gripping claws 4a and 4b (upward in FIG. 6). be able to. Then, the pair of gripping claws 4a and 4b move with their base ends as fulcrums so that their tips approach each other.

Therefore, when the front feed bar 1 approaches the workpiece W, if the switching valve SV is switched and the hydraulic pump P is connected to the second oil chamber R2, the workpiece W is sandwiched between the tips of the pair of gripping claws 4a and 4b. Can be supported. That is, the workpiece W can be clamped.
Conversely, when the front feed bar 1 is separated from the workpiece W, if the switching valve SV is switched and the hydraulic pump P is connected to the first oil chamber R1, the tips of the pair of gripping claws 4a and 4b are separated. The workpiece W can be released. That is, the workpiece can be unclamped.
Since the pair of gripping claws 4a and 4b contact the workpiece W from the left and right direction of the forging press, even if the pair of gripping claws 4a and 4b move, in other words, the pair of gripping claws 4a and 4b Since the force is not applied in the front-rear direction of the forging press when the work W is gripped and released at the tip, the positioning accuracy of the work W in the front-rear direction of the forging press can be increased.
Said hydraulic cylinder 7 has shown the nail | claw operating member said to a claim.

  When the conveying member 3 is provided on both the front and rear feed bars 1 and 2, both the front and rear ends of the workpiece W are firmly held by the conveying member 3, so that the workpiece W is clamped in a stable state. However, when the workpiece W is a simple and light member such as a round gear, the conveying member 3 may be provided only on the front feed bar 1. In this case, since the work W can be transported only by the front feed bar 1, the rear feed bar 2 and the rear feed bar actuating device 20 are not required, so that the work W is transported in the forging press and the mold is lubricated. The state can be easily confirmed by an operator visually, and the apparatus can be made compact.

FIG. 1 is a plan view of a transfer feeder according to the present invention. It is the II-II arrow directional view of FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic explanatory drawing of the front feed bar actuator 10, (A) is a schematic side view, (B) is a BB schematic sectional drawing of (A), (C) is C of (A). FIG. It is explanatory drawing of the operation | movement which clamps the workpiece | work W with the clamp apparatus. It is explanatory drawing of the operation | movement which unclamps the workpiece | work W with the clamp apparatus 30. FIG. It is an expansion schematic explanatory drawing of the member 3 for conveyance. It is a side view of the conventional transfer feeder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front feed bar 1a Front conveyance claw 1c Energizing means 2 Rear feed bar 2a Rear conveyance claw 3 Conveying member 4 Grip claw 10 Front feed bar actuator 20 Rear feed bar actuator 30 Clamp device 32 Screw type moving mechanism for clamp 32a Clamp screw shaft 32b Clamp nut member 32c Clamp servo motor S Feed bar actuator

Claims (4)

A transfer feeder provided with a front feed bar arranged in front of a multi-step mold in a forging press and a rear feed bar arranged behind, and an operating device for operating the front and rear feed bars,
The actuating device is
A front feed bar actuating device for actuating the front feed bar;
A rear feed bar actuating device capable of independently operating the rear feed bar with respect to the front feed bar;
The transfer feeder in a forging press, wherein the rear feed bar actuating device is arranged behind the front feed bar actuating device and at a position separated from the front feed bar actuating device. The front and rear feed bars are arranged in parallel to each other, and the front and rear feed bar actuating devices are each provided with a clamp mechanism for approaching and separating the front and rear feed bars from the other feed bar,
Each clamp mechanism
It has a ball screw mechanism with a screw shaft,
2. A transfer feeder in a forging press according to claim 1, wherein the screw shaft of the ball screw mechanism is disposed so that the axial direction thereof is orthogonal to the axial direction of a feed bar operated by the ball screw mechanism. . Front and rear conveying claws that support the workpiece by sandwiching the workpiece from the front and rear when the front and rear feed bars approach each other are provided on opposite surfaces of the front and rear feed bars,
Of the front and rear transport claws, a rear transport claw is fixed to the rear feed bar, and a front transport claw is attached to the front feed bar so as to be able to advance and retreat toward the rear transport claw.
An urging means for urging the front conveying claw toward the rear feed bar is provided,
In the case where the front and rear feed bars are separated from each other from the approached state, the rear feed bar actuating device, after the biasing force applied to the workpiece from the biasing means via the front conveying claw no longer acts, 3. The transfer feeder in a forging press according to claim 1, wherein the rear feed bar is adjusted so as to move in a direction away from the front feed bar. Front and rear conveying members that support the workpiece when the front and rear feed bars approach each other are provided on opposite surfaces of the front and rear feed bars,
The front and rear conveying members are
A pair of gripping claws provided so as to be able to approach and separate from each other along the left-right direction of the forging press,
The transfer feeder in a forging press according to claim 1 or 2, comprising a claw actuating member that moves the pair of gripping claws closer to and away from each other.