JP2017192959A - Strip-work feeding method of press machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strip-work feeding method for molding desired products by preventing material yields from getting worse by the retransfer of strip works upon an operation restart of a press machine even when a crank shaft rotates excessively under inertial force or the like upon a shutdown of the press machine to erroneously transfer the strip works on erroneous generation of transfer start signals, and by preventing a deviation of processes in forward feeding dies.SOLUTION: In the case where a storage part (47e) stores a transfer hysteresis of a strip work (9) when the drive of an electric motor (35b) is controlled to transfer the strip work (9) with a work transfer member (31), the drive of the electric motor (35b) is prohibited to control the transfer of the strip work (9), while in the case where the storage part (47e) stores no transfer hysteresis of the strip work (9), the drive of the electric motor (35b) is controlled to enable the transfer of the strip work (9) with the work transfer member (31).SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for feeding a belt-shaped workpiece that is attached to a press machine and grips the belt-shaped workpiece and supplies the belt-shaped workpiece to the press machine. The present invention relates to a belt-like workpiece feeding method for a press machine that prevents a belt-like workpiece from being erroneously transferred when the operation of the press machine is once stopped and stopped after a start angle.

  For example, a belt-shaped workpiece feeding device shown in Patent Document 1 is attached to the press machine, and a workpiece feeding member that holds and transports the belt-shaped workpiece is reciprocated by a predetermined amount corresponding to the press width as the electric motor is driven. The belt-shaped work held is transferred by a predetermined amount sequentially onto a fixed mold of the press machine, thereby enabling press working.

  In the belt-like workpiece feeding device, the workpiece feeding member is provided with, for example, a fixed gripper that can be gripped on the press side, and is movable to grip the belt-like workpiece by moving in a direction approaching and separating from the stationary gripper. A gripper is provided, and the movable gripper that grips the belt-like workpiece is moved to the fixed gripper side at the origin position separated from the fixed gripper that is released from the gripping of the belt-like workpiece in conjunction with the operation of the press machine. After the workpiece is transferred to the press machine, the belt-like workpiece is gripped by the fixed gripper, the gripping of the belt-like workpiece by the movable gripper is released, the gripper is returned, the movable gripper is returned to the home position, and the belt-like workpiece is gripped by the fixed gripper. Based on the transfer start signal from the press machine, the belt-like work is gripped and returned by the movable gripper. The strip-shaped workpiece by repeating the above operation, and forward to a press in a spaced apart the width of up to stationary gripper and a movable gripper.

  For example, when changing the die (fixed die and movable die) of the press machine and setting the belt-like workpiece fed from the coil material on the stationary die, or when replenishing or exchanging the belt-like workpiece During set-up work, the movable metal mold is used to finely adjust the tip of the belt-shaped workpiece to a predetermined position on the fixed mold by inching the press machine connected to the belt-shaped workpiece feeding device. The belt-like workpiece is transferred by driving the belt-like workpiece feeding device based on the transfer start signal generated when the crankshaft of the crank mechanism for raising and lowering the slider to which the mold is attached reaches the transfer start angle at which the belt-like workpiece starts to be transferred. doing.

However, when the setup work is performed by the above-described inching feed, when the crankshaft that raises and lowers the slider stops rotating before a predetermined press cycle angle that generates a transfer start signal, a movable mold is attached and the weight is increased. Due to the inertial force of the slider and the elasticity of the crank arm, the crankshaft vibrates so as to repeat the operation of returning to the front position after exceeding the press cycle angle that generates the transfer start signal.

In this case, the belt-like workpiece transfer device is driven based on the transfer start signal generated when the crankshaft exceeds the press cycle angle, and the belt-like workpiece is forcibly erroneously transferred. When the operation of the machine is resumed, when the crankshaft exceeds a predetermined press cycle angle that generates a transfer start signal, the belt-like workpiece is transferred again due to the above-described action. Therefore, there is a problem that the material yield of the belt-like workpiece is poor.

In particular, when a set-up work is performed in a press machine equipped with a progressive die that arranges a plurality of processes in a single press mold and performs the press processing of each process continuously, the strip-shaped workpiece is excessively erroneous. There is a possibility that the number of processes is shifted and the defective product is press-molded by being transferred.

In addition to the above-described set-up work, for example, when a continuously operated press machine is stopped at a press cycle angle before outputting the transfer start signal, the transfer start signal is generated by the vibration of the crankshaft as described above. A problem similar to the above occurs due to generation by mistake.

Japanese Patent Laying-Open No. 2015-20197

The problem to be solved is that when the crankshaft of the press machine stops before a predetermined press cycle angle that generates a transfer start signal, it depends on the inertial force of the slider to which the movable mold is attached and the elasticity of the crank arm. If the crankshaft rotates excessively and a transfer start signal is erroneously generated, and then the operation of the press machine is resumed, when the crankshaft exceeds a predetermined press cycle angle that generates the transfer start signal, the above action causes a belt-like shape. Despite the fact that the workpiece has already been transferred, it will be transferred again, and the material yield of the strip-shaped workpiece may be deteriorated, or the process of the progressive mold may be shifted, and the desired product may not be molded. In the point.

The present invention relates to a belt-like workpiece transfer device attached to a press machine for punching and forming a product from a belt-like workpiece located between the movable die by reciprocating a movable die with respect to a stationary die as the crankshaft rotates. The workpiece transfer member holding the strip workpiece is transported and driven by a numerically controllable electric motor driven on the basis of a transfer start signal generated when the crankshaft reaches a predetermined press cycle angle, and a predetermined amount of the strip workpiece is transferred. Each time it is transferred to the press machine, the transfer history of the belt-like workpiece is stored in the storage unit (transfer process). 2. The belt-like workpiece by the workpiece transfer member at the timing when the movable die comes close to the belt-like workpiece supported on the fixed die. Can be held by the workpiece transfer member at the timing when the movable die is released from the belt-like workpiece supported on the fixed die. (Release process) 3 When the crankshaft reaches a predetermined press cycle angle as the belt-shaped workpiece is transferred, the transfer history stored in the storage unit is erased. In the belt-like work feeding method that sequentially transports to the press machine,
When the belt-like workpiece transfer history is stored in the storage unit when the electric motor is driven and the belt-like workpiece is transferred by the workpiece transfer member, the drive of the belt-like workpiece is prohibited by prohibiting the driving of the electric motor. On the other hand, when the transfer history of the belt-like workpiece is not stored in the storage unit, the main feature is that the belt-like workpiece can be transferred by the workpiece transfer member by driving and controlling the electric motor.

The present invention resumes the operation of the subsequent press machine even when the crankshaft rotates excessively due to inertial force or the like when the press machine is stopped and the transfer start signal is erroneously generated and the belt-like workpiece is erroneously transferred. Sometimes, it is possible to prevent the material yield from being deteriorated due to the re-transfer of the belt-like workpiece, or to prevent the deviation of the process in the progressive die, thereby forming a desired product.

It is perspective explanatory drawing which shows the outline of the press machine with which the strip | belt-shaped workpiece feeding apparatus was attached. It is a perspective view which shows the outline of a strip | belt-shaped workpiece feeding apparatus. It is an electrical block diagram of a control means. It is explanatory drawing which shows the erroneous output state of a transfer start signal, and the transfer state of a strip | belt-shaped workpiece. It is explanatory drawing which shows the outline of the strip | belt-shaped workpiece feeding apparatus of a 2 gripper format. It is explanatory drawing which shows the outline of the strip | belt-shaped workpiece feeding apparatus of a 2 gripper format. It is explanatory drawing which shows the outline of the strip | belt-shaped workpiece feeding apparatus of a rotary body type.

  When the belt-like workpiece transfer history is stored in the storage unit when the electric motor is driven and the belt-like workpiece is transferred by the workpiece transfer member, the drive of the belt-like workpiece is prohibited by prohibiting the driving of the electric motor. On the other hand, when the belt-like workpiece transfer history is not stored in the storage unit, the best mode is to enable the belt-like workpiece to be transferred by the workpiece transfer member by driving and controlling the electric motor.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, a press machine 3 to which the belt-like workpiece feeding device 1 according to the present invention is attached has a known structure. For example, a slider 7 is supported by the press machine body 5 so as to be movable up and down. A movable mold 11 for attaching a product (not shown) having a desired shape to a metal strip drawn out from a coil material wound in a coil shape (press molding) is attached. A fixed mold 13 is attached to the press machine body 5 relative to the movable mold 11.

  A crank mechanism 15 is connected to the slider 7. An electric motor 17 is connected to the crankshaft 15a of the crank mechanism 9 through a flywheel 15b and a clutch 15c. The crankshaft 15a is provided with a rotation angle detector 19 for detecting the rotation angle of the crankshaft 15a.

The slider 7 is moved up and down with a predetermined stroke by a crankshaft 15a that rotates as the electric motor 17 rotates, and the rotation angle detector 19 outputs a detection signal corresponding to the rotation angle of the crankshaft 15a.

The press machine 3 outputs a release start signal and a release end signal that are generated based on the detection signal output from the rotation angle detector 19 according to the types of the movable mold 11 and the fixed mold 13 that are mounted. Is set as follows. The release start signal is a timing when the movable mold 11 comes close to the surface of the strip-shaped workpiece 9 on the fixed mold 13, and the release end signal is a signal of the strip-shaped workpiece 9 in which the movable mold 11 is supported on the fixed mold 13. Each is output at the timing of separation from the punched hole.

The press machine 3 generates a transfer start signal based on a detection signal output from the rotation angle detector 19 when the rotation angle of the crankshaft 15a reaches a predetermined angle after outputting the release end signal.

Reference numeral 21 in the figure is a guide post provided on the fixed mold 13 with an axis in the vertical direction, and 23 is provided on the movable mold 11, and the guide post 21 is inserted when the slider 7 is lowered. And a guide bush for positioning the movable mold 11 and the fixed mold 13 relative to each other.

For example, a gripper type belt-shaped workpiece feeding device 1 that holds and transports the belt-shaped workpiece 9 is attached to the press machine body 5. A main body 25 of the belt-like workpiece feeding device 1 has an axis line in a horizontal direction orthogonal to the ascending / descending direction of the slider 7, and a pair of guide shafts 27 having a predetermined length in the axial direction are horizontally mounted. A fixed gripper 29 is fixed on the press machine 3 side. A movable gripper 31 as a work transfer member is supported on the guide shaft 27 so as to be movable in the axial direction.

The fixed gripper 29 moves in a vertical direction with respect to a support member 29a fixed to the guide shaft 27 and a pair of vertical guide shafts 29b each having an axis in the vertical direction and having a lower end fixed to the support member 29a. A gripping member 29c that is pivotally supported and a fixed-side operation member 29d such as an electromagnetic solenoid or an air cylinder that is provided on the support member 29a and whose operating shaft is connected to the fixed gripping member 29c. The fixed gripper 29 grips the belt-like workpiece 9 transferred to the upper surface of the support member 29a by a gripping member 29c that moves downward by the operation of the fixed-side operation member 29d.

The movable gripper 31 is supported by a support member 31a supported so as to be movable in the axial direction with respect to the guide shaft 27, and a pair of upper and lower guides each having an axial line in the vertical direction and having a lower end fixed to the support member 31a. A gripping member 31c that is pivotally supported so as to be movable in the vertical direction with respect to the shaft 31b, and a movable side operation such as an electromagnetic solenoid or an air cylinder that is provided on the support member 31a and whose operating shaft is coupled to the gripping member 31c. It is comprised by the member 31d. The movable gripper 31 grips the belt-like workpiece 9 transferred to the upper surface of the support member 31a so as not to be transferred by a gripping member 31c that moves downward by the operation of the movable side operation member 31d.

Note that the fixed gripper 29 and the movable gripper 31 are gripping members 29c corresponding to the support members 29a and 31a by elastic members such as a built-in compression spring when the operation members 29d and 31d are not operated. The belt 31 is biased in the direction of separating and the belt-like workpiece 9 is kept in the non-gripping state. On the other hand, when the operation members 29d and 31d are not operated, the corresponding holding members 29c and 31c are urged toward the support members 29a and 31a by the elastic members such as the built-in tension springs. Thus, a configuration in which the belt-like workpiece 9 is maintained in a gripping state, or a configuration in which the operation members 29d and 31d are operated in response to gripping and non-holding of the belt-like workpiece 9 may be employed.

In addition to the elastic members built in the respective operation members 29d and 31d, elastic members such as compression springs are interposed on the upper and lower guide shafts 29b and 31b positioned between the support members 29a and 31a and the gripping members 29c and 31c. However, it may be configured to keep the non-holding state when the operation members 29d and 31d are not operated by the elastic force of these elastic members.

The main body 25 is provided with moving means 35 for moving the movable gripper 31 between a position close to the fixed gripper 29 and a separated origin position. The moving means 35 includes a pair of rotating bodies 35a such as a toothed pulley rotatably supported on the fixed gripper 29 side and the origin position side, and a numerically controllable servo connected to one of the rotating bodies 35a. An electric motor 35b such as a motor, and a traveling member 35c such as a timing belt that is stretched over a pair of rotating bodies 35a and partially fixed to the support member 35a of the movable gripper 31 are configured.

The electric motor 35b is provided with a position detector 35d such as a rotary encoder, and the moving position and the moving amount of the movable gripper 31 are detected based on a detection signal from the position detector 35d. An origin detector (not shown) that detects that the movable gripper 31 has been moved to the origin position is provided at the origin position of the movable gripper 31.

In addition to the above-described configuration, the transfer unit 35 has an axis line in a direction that coincides with the moving direction of the movable gripper 31 and is engaged with a nut (not shown) provided on the movable gripper 31 ( It is good also as a structure which moves the movable gripper 31 by carrying out rotation drive control of the electric motor (not shown) which can be numerically controlled.

The main body 25 is provided with an operation box 39 in which a control means 37 is built. On the surface of the operation box 39, various switches 39a such as a power switch, a start switch, an emergency stop button, a work feed button, a transfer amount setting button, a setup button, and a movement amount for displaying the movement amount of the movable gripper 31 relative to the origin position numerically. Various display units such as a display unit 39b, a transfer start angle display unit 39c, and a transfer history display unit 39d are provided.

The main body 25 on the opposite side of the press 3 has a plurality of guide rollers for guiding the belt-like workpiece 9 fed from a coil material (not shown) wound in a coil shape to the movable gripper 31. 41 is rotatably supported in a state where the axes of each other are parallel to each other.

As shown in FIG. 3, the processing unit 43 of the control means 37 is provided with a program data storage unit 45 and a work data storage unit 47. 9 erroneous transfer prevention program data and the like are stored.

The work data storage unit 47 counts the detection signal from the position detector 35d and stores the transfer amount of the movable gripper 31, and stores the transfer amount of the movable gripper 31. The rotation angle of the crankshaft 15a is detected by the detection signal from the rotation angle detector 19. A rotation angle storage area 47b for storing the rotation angle, a release storage area 47c for storing the rotation angle of the crankshaft 15a that generates a release start signal and a release end signal preset by the movable mold 11 and the thirteenth type, and a rotation angle storage A transfer start angle storage area 47d for storing the transfer start angle of the belt-like work 9 based on the rotation angle of the crankshaft 15a stored in the area 47b, a flag area 47e for storing the transfer history of the belt-like work 9 and the like are provided.

A detection signal from the rotation angle detector 19 output from the control means (not shown) of the press machine 3 and a detection signal output from the electric motor 35 b are input to the processing unit 43 via the input / output unit 49. .

The processing unit 43 is provided with a display control unit 51. The display control unit 51 starts the transfer of the movement amount of the movable gripper 31 to the movement amount display unit 39b based on the transfer amount data stored in the transfer amount storage area 47a. Based on the transfer start angle data stored in the angle storage area 47d, the transfer start angle is displayed on the transfer start angle display section 39c, and the transfer history stored in the flag area 47e is displayed on the transfer history display section 39d.

The processing unit 43 is provided with an operating member control unit 53, which operates on the fixed side operating member 29 d and the movable side operation based on the release start signal and the release end signal output from the control means of the press machine 3. Each of the members 31d is turned on and off to grip the belt-like workpiece 9 by the fixed gripper 29 and the movable gripper 31, and release the grip.

The processing unit 43 is provided with a motor control unit 55. The motor control unit 55 controls the driving of the electric motor 35b by operating a switch 37a such as a start switch, an emergency stop button, a work feed button, etc., and transfers the belt-like work 9. At the same time, the electric motor 35b is driven and controlled by the transfer start signal generated when the rotation angle of the crankshaft 15a reaches the transfer start angle stored in the transfer start angle storage area 47d by the detection signal from the rotation angle detector 19. The belt-like work 9 is transferred.

Next, the operation of the belt-shaped workpiece feeding device 1 configured as described above will be described. First, the operation when the belt-shaped workpiece 9 is transferred to the press machine 3 will be described. The switch 39a of the transfer amount setting button of the operation box 39 will be described. When the switch 39a of the start switch is turned ON after setting the transfer amount of the belt-like workpiece 9 by the first step, the fixed-side operation member 29d is actuated first, and the belt-like workpiece 9 between the support member 29a is fixed by the holding member 29c. The movable gripper 31 is held on the side opposite to the press 3 by an electric motor 35b that is driven while the gripping of the belt-like workpiece 9 by the movable gripper 31 is released. The movable gripper 31 is held by the movable gripper 31 by the movable side operation member 31d which is operated after returning to the origin position. The Jogawa actuating member 29d inoperative to release the grip of the strip-shaped workpiece 9 by the fixed gripper 29.

After the above operation, when the movable gripper 31 that grips the belt-like workpiece 9 by driving and controlling the electric motor 35b is moved by the transfer amount set to the fixed gripper 29 side, a press start signal is output to the press machine 3 to be electrically operated. The movable mold 11 provided on the slider 7 is moved toward the strip-shaped workpiece 9 on the fixed mold 13 by the crankshaft 15 a that rotates by driving the motor 17. Then, in response to a release start signal that is output when the movable mold 11 comes close to the surface of the belt-like workpiece 9, the stationary-side operation member 29 d is deactivated and the gripping of the belt-like workpiece 9 by the fixed gripper 29 is released.

After the product (not shown) is punched from the belt-like workpiece 9 by the movable mold 11 entering the fixed mold 13, the slider 7 moves from the bottom dead center to the top dead center, and the movable mold 11 is fixed. When a release end signal is output at the timing when the belt-like workpiece 9 on the die 13 is pulled out from the punching hole, the fixed-side operation member 29d is operated to cause the fixed gripper 29 to grip the belt-like workpiece 9 and the movable-side operation member 31d The non-operating state is maintained and the movable gripper 31 is operated after the movable gripper 31 is returned to the origin position on the side opposite to the press 3 by the electric motor 35b while the movable gripper 31 is kept gripping and released. The belt-like workpiece 9 is gripped by the movable gripper 31 by the movable side operation member 31d and the fixed side operation member 29d is inactivated to form a belt shape by the fixed gripper 29. To release the grip of over click 9, to position the next order of the press portion on the fixed mold 13 in the strip-shaped workpiece 9 and transported in transfer amount set the strip-shaped workpiece 9 by repeating the operation described above.

  Next, when the continuous press operation is stopped before the rotation angle of the crankshaft 15a reaches the press cycle angle that generates the transfer start signal, the crankshaft 15a is provided with the movable mold 11 as shown in FIG. Thus, the slider 7 is rotated so as to return beyond the press cycle angle at which the transfer start signal is generated by the inertial force of the slider 7 and the elasticity of the crank arm.

  At this time, if the rotation angle of the crankshaft 15a exceeds the press cycle angle for generating the transfer start signal, the control means 37 drives and controls the electric motor 35b even when the press machine 3 is not in operation. The movable gripper 31 that holds the workpiece is moved by the transfer amount stored in the transfer amount storage area 47a to transfer the belt-like work 9 to the fixed gripper 29 side, and then the flag area 47e is set to store the transfer history of the belt-like work 9 And the transfer history is displayed on the transfer history display section 39d.

  Although a phenomenon occurs in which the rotation of the crankshaft 15a returning beyond the press cycle angle is repeated and a plurality of transfer start signals are generated, the control means 37 performs a new transfer after the start of the transfer of the belt-like workpiece 9 described above. Prohibit generation of start signal. In addition, the transfer history of the belt-like workpiece 9 is stored in the flag area 47e and the transfer history is displayed on the transfer history display unit 39d. The timing at which the movable gripper 31 starts to transfer the belt-like workpiece 9, Either the timing at which the transfer is completed or an appropriate timing during the transfer of the belt-like workpiece 9 may be used.

After the above operation, when the operation of the press machine 3 is resumed, the crankshaft 15a that has stopped before the press cycle angle that generates the transfer start signal starts rotating and passes through the press cycle angle that generates the transfer start signal. As a result, a new transfer start signal is generated, but the control unit 37 refers to the transfer history stored in the flag area 47e and determines that the transfer of the belt-like workpiece 9 is completed, and the electric motor 35b The driving is prohibited and the transfer of the belt-like workpiece 9 is restricted, and the belt-like workpiece 9 is prevented from being erroneously transferred.

On the other hand, when the rotation angle of the crankshaft 15 a detected by the rotation angle detector 19 reaches the release start position by restarting the operation of the press machine 3, the control means 37 holds the belt-like workpiece 9 by the fixed gripper 29 and the movable gripper 31. At the same time, the flag area 47e is reset, that is, the transfer history of the belt-like workpiece 9 is deleted, and the transfer history of the transfer history display unit 39d is changed to the non-display state.

Then, when the rotation angle of the crankshaft 15a detected by the rotation angle detector 19 reaches the release end position due to the progress of the press operation by the press machine 3, the control means 37 causes the movable gripper 31 to grip the belt-like workpiece 9, When the rotation angle of the crankshaft 15a reaches the press cycle angle that generates the transfer start signal, it is determined that the transfer of the belt-like workpiece 9 is not completed with reference to the flag region 47e, and the electric motor 35b is driven to control the belt-like shape. The movable gripper 31 holding the work 9 is moved to the fixed gripper 29 side, and the belt-like work 9 is transferred.

In this embodiment, when the press machine 3 is stopped so that the crankshaft 15a is positioned before the press cycle angle that generates the transfer start signal, the crankshaft 15a is transferred by the inertial force of the slider 7 and the elasticity of the crank arm. After the belt-like workpiece 9 is forcibly transferred by being rotated beyond the press cycle angle that generates the start signal, the operation of the press machine 3 is resumed, and the crankshaft 15a is rotated beyond the press cycle angle to start a new operation. A transfer start signal will be output, but the movable die and the fixed die due to the excessive transfer of the belt-like work by referring to the transfer history stored in the flag area 47e and prohibiting the transfer at that time. It is possible to prevent the mold from being damaged, and in the case of a progressive metal mold, it is possible to prevent the pressing process from shifting.

In the above description, the transfer history stored in the flag area 47e is erased by the release start signal. However, the transfer history may be erased after the release start signal is output until the release end signal is output. .

Although the above description has been given by using the 1-gripper type belt-shaped workpiece feeding device 1 that grips and transports the belt-shaped workpiece 9 with one movable gripper 31, the apparatus embodying the belt-shaped workpiece feeding method of the present invention is shown in FIG. As shown in FIG. 6, a two-gripper type belt-like workpiece feeding device that moves the two grippers 61, 63 to transfer the belt-like workpiece, and is connected to an electric motor 71 as shown in FIG. The support rotator 73 and the support rotator 73 are provided so as to be able to come into contact with and separate from the support rotator 73 by the operation of the cylinder member 75, and are configured to press and transfer the belt-like workpiece 9 supported by the support rotator 73. Any of the strip-shaped workpiece feeding devices of the rotating body type can be implemented.

DESCRIPTION OF SYMBOLS 1 Band-shaped workpiece feeder 3 Press machine 5 Press machine main body 7 Slider 9 Band-shaped workpiece 11 Movable mold 13 Fixed mold 15 Crank mechanism 15a Crankshaft 15b Flywheel 15c Clutch 17 Electric motor 19 Rotation angle detector 21 Guide post 23 Guide bush 23 25 Main body 27 A pair of guide shafts 29 A fixed gripper 29a A support member 29b A pair of upper and lower guide shafts 29c A gripping member 29d A fixed side operation member 31 A movable gripper 31a as a work transfer member A support member 31b A pair of upper and lower guide shafts 31c A gripping member 31d The movable side Actuating member 35 Moving means 35a A pair of rotating bodies 35b Electric motor 35c Traveling member 35d Position detector 37 Control means 39 Operation box 39a Various switches 39b Movement amount display section 39c Transfer start angle display section 41 Guide roller 43 Processing section 45 Gram data storage unit 47 Work data storage unit 47a Transfer amount storage region 47b Rotation angle storage region 47c Release storage region 47d Transfer start angle storage region 47e Flag region 49 Input / output unit 51 Display control unit 53 Actuating member control unit 55 Motor control unit 61 , 63 Gripper 71 Electric motor 73 Supporting rotating body 75 Cylinder member 77 Pressing rotating body

Claims (7)

A belt-shaped workpiece transfer device attached to a press machine that punches and forms a product from a strip-shaped workpiece located between the two by moving the movable mold back and forth with the rotation of the crankshaft,
1. The belt-like workpiece is moved and driven by a numerically controllable electric motor driven based on a transfer start signal generated when the crankshaft reaches a predetermined press cycle angle. A fixed amount is transferred to the press machine and the transfer history of the belt-like workpiece is stored in the storage unit (transfer process).
2. Timing at which the movable mold is released from the band-shaped workpiece supported on the fixed mold while releasing the holding of the band-shaped workpiece by the workpiece transfer member when the movable mold approaches the band-shaped workpiece supported on the fixed mold. Enables to hold the belt-shaped workpiece by the workpiece transfer member (release process),
3 When the crankshaft reaches a predetermined press cycle angle as the belt-shaped workpiece is transferred, the transfer history stored in the storage unit is deleted.
In the belt-like workpiece feeding method for sequentially transferring the belt-like workpiece to the press machine by repeating the above 1 to 3,
When the belt-like workpiece transfer history is stored in the storage unit when the electric motor is driven and the belt-like workpiece is transferred by the workpiece transfer member, the drive of the belt-like workpiece is prohibited by prohibiting the driving of the electric motor. On the other hand, when a belt-like workpiece transfer history is not stored in the storage unit, a belt-like workpiece feeding method for a press machine that enables the belt-like workpiece to be transferred by the workpiece transfer member by driving and controlling the electric motor. In claim 1,
When the operation of the press machine is stopped so that the crankshaft is positioned at an angle corresponding to the front of the predetermined press cycle angle, the crankshaft vibrates and the transfer start signal exceeds the predetermined press cycle angle. When generated, the electric motor is driven and controlled based on the transfer start signal to transfer the belt-like workpiece by a predetermined amount by the workpiece transfer member and store the belt-like workpiece transfer history in the storage unit,
When the crankshaft exceeded the predetermined press cycle angle when the operation of the press machine was resumed with the crankshaft stopped rotating at an angle corresponding to the angle before the predetermined press cycle angle, the data was stored in the storage unit. While prohibiting the driving of the electric motor with reference to the transfer history and restricting the transfer of the belt-like work by the work transfer member,
When the crankshaft reaches a predetermined press cycle angle as the belt-shaped workpiece is transferred, the transfer history stored in the storage unit is deleted,
The electric motor is driven and controlled based on the transfer start signal generated when the rotation angle exceeds the predetermined press cycle angle with the rotation of the crankshaft, and the belt-like workpiece is transferred by a predetermined amount by the workpiece transfer member. Feeding method for belt-like workpieces in press machines. In claim 1,
The workpiece transfer member is fixed to the press, and is supported so that it can reciprocate in the direction approaching and separating from the fixed gripper that can grip the belt-like workpiece that passes, and the gripper that can pass. A belt-like workpiece feeding method for a press consisting of a simple movable gripper. In claim 1,
The workpiece transfer member is supported rotatably with an axis in a direction orthogonal to the transfer direction of the belt-like workpiece and connected to an electric motor capable of numerical control, and an outer peripheral surface of the support rotary member A belt-like work feeding method for a press machine, comprising: a movable rotating body supported so as to be able to contact and separate; In claim 1,
A press machine that erases the transfer history stored in the storage unit at the output timing of a release start signal that releases the holding of the band-shaped workpiece by the workpiece transfer member when the movable mold approaches the band-shaped workpiece supported on the fixed mold Feeding method for strips. In claim 1,
The transfer history stored in the storage unit is erased at the output timing of the release end signal that enables the workpiece transfer member to hold the belt-like workpiece when the movable die is released from the punching hole of the belt-like workpiece. Method. In claim 1,
A belt-like work feeding method for a press machine, wherein a transfer history can be displayed on a display unit when a transfer history is stored in a storage unit.

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