Motion generation device, stamping device, and motion generation method

Abstract

The present invention provides a motion generating device, a punching device, and a motion generating method. The motion generating device (3) is a motion generating device for generating the motion of a slider (11) of a punching device (5) having a slider (11) mounted with an upper mold (7a), a pad (12) carrying a lower mold (7b), and a servo motor (15) for reciprocating the slider (11) in the up-down direction. The motion generating device has a motion generating unit (32). The motion generating unit (32) makes the standard motion (Mi) of the slider (11) in the cycle (TStd) at least including the first area (Mim (1) from the top dead center to the end position of the forming area, and makes the speed of the slider (11) at the top dead center the same as the speed of the standard motion (Mi), thereby generating a derived motion (Mim) of the slider (11) in a cycle (Tm) different from the cycle (TStd).

Description

Technical Field

[0001] The present invention relates to a motion generating device, a punching device, and a motion generating method. Background Art

[0002] When performing stamping operations, tandem press lines or transfer press lines are used.

[0003] In a tandem press line, a plurality of press devices are arranged in parallel, and a feeding device (conveying device) for conveying a workpiece is provided between the press devices (see, for example, Patent Document 1).

[0004] In the serial press line, a phase difference is set for the movement of multiple presses and feeding devices to avoid interference and to enable them to move at the maximum speed. In addition, in the transfer press line, a phase difference is set for the movement of the presses and transfer devices.

[0005] In addition, in the press line, in order to avoid excessive impact on the feeding device at the time of startup, the operating speed of the press line is sometimes suppressed, and the speed is increased in a manner that gradually becomes a stable operating state. The following technology has been disclosed, that is, even in the above-mentioned situation, in order to maintain the forming accuracy of the stamping device, the movement of the slider in the forming area is maintained and the cycle is changed (for example, see Patent Document 2).

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: (Japanese) Patent Publication No. 2018-94617

[0009] Patent Document 2: (Japan) Patent No. 6510873 Summary of the Invention

[0010] On the other hand, due to reasons such as adjusting the production volume of stamped products, it is sometimes desirable to operate the press line at a reduced speed.

[0011] In this case, in order to maintain the forming accuracy, it is possible to consider maintaining the movement of the forming area and extending the cycle to reduce the speed of the stamping line as shown in Patent Document 2. However, simply extending the cycle to reduce the operating speed of the stamping device may cause interference between the stamping device and the feeding device.

[0012] In order to eliminate this interference, it is necessary to make a large-scale revision to the program that controls the entire press system, including not only the press device but also the feeder.

[0013] An object of the present disclosure is to provide a motion generation device, a punching device, and a motion generation method that can maintain forming accuracy and easily change the speed of a press line.

[0014] (Technical solutions for solving technical problems)

[0015] A first disclosed motion generation device generates motion of a slider of a press machine having a slider mounted with an upper die, a backing plate on which a lower die is mounted, and a servo motor for reciprocating the slider in a vertical direction. The motion generation device includes a motion generation unit. The motion generation unit generates a second motion of the slider in a second cycle different from the first cycle by making the slider's first motion in a first cycle identical, including at least a predetermined portion from the top dead center to the end position of the forming area, and by making the slider's speed at the top dead center the same as that of the first motion.

[0016] The second disclosed stamping device is a stamping device that uses an upper die and a lower die to stamp a workpiece, and the stamping device includes: a slider, a pad, a servo motor, a storage unit, and a control unit. The slider is mounted with an upper die. The pad is mounted with a lower die. The servo motor causes the slider to reciprocate in the up and down directions. The storage unit stores a second motion that makes the first motion of the slider in the first cycle at least include the same specified portion from the top dead center to the end position of the forming area, and makes the speed of the slider at the top dead center the same speed as the first motion but different from the first cycle. The control unit drives the servo motor to cause the slider to move in the second motion.

[0017] A third disclosed motion generation method is a method for generating motion of a slider in a press device having a slider mounted with an upper die, a backing plate on which a lower die is mounted, and a servo motor for reciprocating the slider in a vertical direction, the motion generation method comprising a motion generation step of generating a second motion of the slider in a second cycle different from the first cycle by making the slider's first motion in a first cycle identical, including at least a predetermined portion from the top dead center to the end position of the forming area, and making the slider's speed at the top dead center the same as that of the first motion.

[0018] (Effects of the Invention)

[0019] According to the present disclosure, it is possible to provide a motion generation device, a press device, and a motion generation method that can maintain forming accuracy and easily change the speed of a press line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a diagram showing the configuration of a press system according to an embodiment of the present disclosure.

[0021] Figure 2 It is a diagram showing the configuration of a press device of a press system according to an embodiment of the present disclosure.

[0022] Figure 3It is a perspective view showing the structure of a feeder main body of a press system according to an embodiment of the present disclosure.

[0023] Figure 4 This is a block diagram showing the configuration of a feeder device of a press system according to an embodiment of the present disclosure.

[0024] Figure 5 This is a block diagram showing the configuration of a wire control device and a motion generation device of a press system according to an embodiment of the present disclosure.

[0025] Figure 6 is a diagram showing standard motion and derived motion according to an embodiment of the present disclosure.

[0026] Figure 7 This is a flowchart showing the operation of the motion generation device of the press system according to the embodiment of the present disclosure.

[0027] Figure 8 (a) is a diagram showing the relationship between the operation of the press device and the operation of the feeder device of the press system according to the embodiment of the present disclosure. Figure 8 (b) is a schematic side view for explaining the operation of the feeding device.

[0028] Figure 9 (a) is a diagram showing the relationship between the standard motion of the punching device and the action of the feeding device, Figure 9 (b) is a diagram showing the relationship between the operations of the press device and the feeding device that derive the motion.

[0029] Figure 10 This diagram shows a derived motion in which the speed at the time of reaching the top dead center does not match the speed of the standard motion and deceleration is still performed.

[0030] Figure 11 It is a diagram showing the configuration of a press device according to a modified example of the embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] A tandem press line according to an embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0032] <Structure>

[0033] (Overview of tandem press lines)

[0034] Figure 1 It is a diagram showing the overall configuration of a press system 1 according to an embodiment of the present disclosure.

[0035] A press system 1 of this embodiment includes a press line 2 and a motion generating device 3 .

[0036] The press line 2 performs press working in each process and transports the workpiece W between the processes. The motion generating device 3 generates the motion of the slides of the press devices 5a, 5b, 5c, and 5d of the press line 2. Figure 1 In FIG, the conveying direction of the workpiece W is represented by X.

[0037] The stamping line 2 is a series stamping line, which has: a line control device 4, multiple stamping devices 5a, 5b, 5c, 5d (when the stamping devices are not distinguished, they are recorded as stamping devices 5), and multiple feeding devices 6a, 6b, 6c, 6d, 6e (when the feeding devices are not distinguished, they are recorded as feeding devices 6).

[0038] The workpiece W fed into the punching device 5a by the feeding device 6a is punched in the punching device 5a and then transported from the punching device 5a to the punching device 5b by the feeding device 6b. Then, the workpiece W punched in the punching device 5b is transported from the punching device 5b to the punching device 5c by the feeding device 6c and punched in the punching device 5c. The workpiece W punched in the punching device 5c is fed out of the punching device 5c by the feeding device 6d and transported to the punching device 5d. The workpiece W punched in the punching device 5d is fed out of the punching device 5d by the feeding device 6e.

[0039] (Punching device 5)

[0040] Figure 2 It is a diagram showing the structure of the press device 5.

[0041] like Figure 1 and Figure 2 As shown, each of the press machines 5a, 5b, 5c, and 5d includes a press machine body 10 and a press control device 20. The press control device 20 controls the operation of the press machine body 10.

[0042] (Pressing device main body 10)

[0043] The press machine body 10 includes a slider 11 and a backing plate 12 (see Figure 1 ), and a slider driving unit 13.

[0044] like Figure 1 As shown, an upper mold 7a is attached to the lower surface of the slider 11. A lower mold 7b is placed on the upper surface of the backing plate 12. The slider driving unit 13 drives the slider 11 in the vertical direction.

[0045] like Figure 2 As shown, the slider driving unit 13 includes a servo amplifier 14 , a servo motor 15 , a main gear 16 , a position detection encoder 17 , a plunger 18 , and a connecting member 19 .

[0046] The servo motor 15 is driven to move the slide 11 upward and downward relative to the backing plate 12 , thereby performing a press working between the upper die 7 a and the lower die 7 b .

[0047] The servo amplifier 14 drives the servo motor 15 based on a command from the press control device 20 .

[0048] The main gear 16 is connected to the shaft of the servo motor 15 by a connecting member 9 such as a belt or a gear, and is rotated by the rotation drive of the servo motor 15. A position detection encoder 17 is provided on the rotating shaft of the main gear 16, for example, to detect the rotation position of the main gear 16 (or the position of the slider 11) and feed it back to the stamping control device 20.

[0049] The plunger 18 has its lower end fixed to the slider 11, allowing the slider 11 to move vertically. The connecting member 19 connects the main gear 16 and the plunger 18. The connecting member 19 converts the rotational motion of the main gear 16 into the vertical motion of the plunger 18.

[0050] (Pressing control device 20)

[0051] The press control device 20 includes a press control unit 21 , a program storage memory 22 , a display monitor 23 , an input keyboard 24 , and a receiving unit 25 .

[0052] The stamping control unit 21 includes a processor and a memory. The processor is, for example, a CPU (Central Processing Unit). Alternatively, the processor may be a processor different from the CPU. The processor executes processing for controlling the stamping device body 10 according to a program stored in the memory. The memory includes a non-volatile memory such as a ROM (Read Only Memory) and a volatile memory such as a RAM (Random Access Memory). The memory may also include an auxiliary storage device such as a hard disk or an SSD (Solid State Drive). The memory is an example of a storage medium that can be read in a non-transitory computer.

[0053] In this embodiment, the program storage memory 22 is described as a configuration separate from the press control unit 21 , but the program storage memory 22 may be included in the memory of the press control unit 21 .

[0054] The program storage memory 22 stores a standard program for executing standard motions of the plurality of slides 11 corresponding to the plurality of die sets, and a derived program for executing derived motions. The standard motions and the derived motions will be described later.

[0055] The press control unit 21 obtains the position information of the slide from the position detection encoder 17 and sends a command signal to the servo amplifier 14 to drive the servo motor 15 so that the slide 11 moves according to the motion executed by the program stored in the program storage memory 22. Figure 2 It is clear that by changing the speed of the servo motor 15 , the speed of the slide 11 , that is, the pressing speed, changes.

[0056] The display monitor 23 displays the settings and operating status of the press device 5. For example, the motions of a plurality of slides are displayed on the display monitor 23, and the operator selects a motion.

[0057] The operator inputs various settings on the input keyboard 24 , for example, selecting one of a plurality of exercises displayed on the display monitor 23 .

[0058] The receiving unit 25 receives a synchronization signal transmitted from the line control device 4. The synchronization signal is a signal for adjusting the start timing of the plurality of press devices 5a to 5d and the feeder devices 6a to 6e. The press control unit 21 drives the press main body 10 based on the synchronization signal.

[0059] Furthermore, the receiving unit 25 receives a derived program for executing the derived motion generated by the motion generating device 3. The derived program received by the receiving unit 25 is stored in the program storage memory 22 by the operation of the press control unit 21.

[0060] (Feeding device 6)

[0061] The feeding devices 6a, 6b, 6c, 6d, and 6e have the same structure.

[0062] Figure 3 : is a perspective view showing the feeding device 6. Figure 3 , a width direction Y perpendicular to the conveying direction X is shown, and with respect to the conveying direction X, a left direction is represented by YL, and a right direction is represented by YR. Figure 4 It is a block diagram showing the structure of the feeding control device 50.

[0063] like Figure 4 As shown, the feeding device 6 includes a feeding device body 60 and a feeding control device 50. The feeding control device 50 controls the operation of the feeding device body 60.

[0064] (Feeding device main body 60)

[0065] The feeder main body 60 includes a slide mechanism 61 , an arm support portion 62 , a rotating portion 63 , a first arm 64 , an extendable portion 65 , a second arm 66 , a rotating portion 67 , a conveying rod 68 , and a rotating portion 69 .

[0066] The sliding mechanism 61 is arranged between the punching device 5a and the punching device 5b. The sliding mechanism 61 includes: a ball screw 611, a guide 612, and a servo motor 70a. The ball screw 611 extends from the punching device 5a to the punching device 5b along the conveying direction X. The guide 612 is cylindrical and arranged below the ball screw 611 and parallel to the ball screw 611. The servo motor 70a is connected to one end of the ball screw 611 via a reduction gear, etc., to rotate the ball screw 611.

[0067] The arm support portion 62 is a box-shaped component that rotatably supports the first arm 64. A pair of upper and lower blocks 621 are provided on the side surface of the arm support portion 62 on the left side in the direction YL. A through hole is formed in the upper block 621 along the conveying direction X, and a threaded shape is formed on the inner side surface thereof. The ball screw 611 is inserted through the through hole of the upper block 621 and screwed into the threaded shape on the inner side surface of the through hole. In addition, a through hole is formed in the lower block 621 along the conveying direction X, and a guide 612 is inserted through it. When the ball screw 611 rotates due to the rotation of the servo motor 70a, the arm support portion 62 can be guided by the guide 612 and move toward the upstream side or downstream side of the conveying direction X (refer to arrow A1).

[0068] The rotating unit 63 is provided on the arm support 62 and rotates the first arm 64. The rotating unit 63 includes a servo motor 70b and a speed reduction unit (not shown). The servo motor 70b is fixed inside the arm support 62. The servo motor 70b is arranged so that the drive shaft extends to the right direction YR.

[0069] The upper end portion of the first arm 64 is fixed to the drive shaft of the servo motor 70b via a speed reducing portion. The first arm 64 rotates around a central axis C1 along the width direction Y (see arrow A2).

[0070] The first arm 64 is telescopically configured and includes a hollow first portion 641 and a hollow second portion 642. The upper end of the first portion 641 is fixed to the drive shaft of the servo motor 70b via a speed reduction unit. The lower end of the first portion 641 fits inside the upper end of the second portion 642.

[0071] The telescopic portion 65 is provided on the first arm 64 to extend and retract the first arm 64. The telescopic portion 65 includes a ball screw 651, a servo motor 70c, and a mating nut 652. The ball screw 651 is arranged on the inner side of the first arm 64 along the longitudinal direction of the first arm 64. The ball screw 651 is arranged across the first part 641 and the second part 642. The servo motor 70c is fixed on the inner side of the first part 641. The drive shaft of the servo motor 70c is connected to the ball screw 651 via the speed reduction portion. The mating nut 652 fixes the through hole on the inner side of the second part 642 along the longitudinal direction of the first arm 64. The ball screw 651 is inserted into the through hole of the mating nut 652, and the ball screw 651 is mated with the thread shape formed on the inner side surface of the through hole.

[0072] Thus, when the ball screw 651 is rotated by the drive of the servo motor 70 c , the second portion 642 moves relative to the first portion 641 along with the fitting nut 652 , thereby enabling the first arm 64 to extend and retract (see arrow A3 ).

[0073] The second arm 66 is arranged at the lower end of the first arm 64 along the longitudinal direction of the first arm 64. The longitudinal direction of the second arm 66 coincides with the longitudinal direction of the first arm 64.

[0074] The rotating unit 67 is provided on the second portion 642 of the first arm 64 and rotates the second arm 66. The rotating unit 67 includes a servo motor 70d and a speed reduction unit (not shown). The servo motor 70d is fixed inside the second portion 642. The servo motor 70d is arranged with a drive shaft extending downward along the length of the first arm 64.

[0075] The upper end of the second arm 66 is fixed to the drive shaft of the servo motor 70d via a speed reducing unit. The second arm 66 is rotatable with its longitudinal direction as the central axis C2 (see arrow A4).

[0076] The conveying rod 68 is arranged at the lower end of the second arm 66 along the width direction Y. A holder 80 for holding the workpiece W is detachably mounted on the conveying rod 68. The conveying rod 68 includes a connecting portion 681, a left rod 682, a right rod 683, and a rod rotating portion 684. The connecting portion 681 is connected to the lower end of the second arm 66. The left rod 682 is rotatably mounted on the left side of the connecting portion 681 in the direction YL. The right rod 683 is rotatably mounted on the right side of the connecting portion 681 in the direction YR. The left rod 682 and the right rod 683 are connected by a connecting shaft 685. The left rod 682, the right rod 683, and the connecting shaft 685 rotate about their longitudinal direction as the central axis C3.

[0077] The rod rotating portion 684 is located inside the connecting portion 681 and includes a servo motor 70e and a speed reduction unit. The drive shaft of the servo motor 70e engages with the threaded portion around the connecting shaft 685 via the speed reduction unit. The connecting shaft 685 rotates as the servo motor 70e rotates, and the left and right rods 682 and 683 connected to the connecting shaft 685 also rotate (see arrow A5).

[0078] The rotating portion 69 is provided on the second arm 66. The connecting portion 681 of the conveying rod 68 is rotatably connected to the lower end of the second arm 66 about a central axis C4 along the conveying direction X. The rotating portion 69 includes a servo motor 70f and a speed reduction unit. The drive shaft of the servo motor 70f is fixed to the upper end of the connecting portion 681 via the speed reduction unit. Driven by the servo motor 70f, the conveying rod 68 rotates about the conveying direction X as the central axis C4 (see arrow A6).

[0079] In addition, if Figure 4 As shown in the block diagram of FIG, the feeder main body 60 includes a servo motor 70 (specifically, servo motors 70a to 70f, and collectively, servo motor 70), a servo amplifier 71, and a position detection encoder 72. The servo amplifier 71 drives the servo motor 70 in response to a command from the feeder control device 50. The position detection encoder 72 detects the position of the servo motor 70 and provides feedback to the feeder control device 50. Specifically, each of the servo motors 70a to 70f is provided with a servo amplifier and a position detection encoder.

[0080] (Feeding control device 50)

[0081] The feed control device 50 controls the feed device main body 60 .

[0082] The feeding control device 50 includes a feeding control unit 51, a program storage memory 52, and a receiving unit 53. In addition, the feeding control device 50 of the present embodiment is provided with a display monitor and an input keyboard, but these may not be provided.

[0083] The feeding control unit 51 includes a processor and a memory. The processor is, for example, a CPU (Central Processing Unit). Alternatively, the processor may be a processor different from the CPU. The processor executes processing for controlling the feeding device main body 60 according to the program stored in the memory. The memory includes non-volatile memory such as ROM (Read Only Memory) and volatile memory such as RAM (Random Access Memory). The memory may also include auxiliary storage devices such as a hard disk or SSD (Solid State Drive). The memory is an example of a storage medium that can be read in a non-transitory computer. The memory stores programs and data for controlling the feeding device main body 60, and stores multiple movements.

[0084] In the present embodiment, the program storage memory 52 is described as a configuration separate from the feed control unit 51 , but the program storage memory 52 may be included in the memory of the feed control unit 51 .

[0085] The feed control unit 51 drives the feed device main body 60 according to the motion stored in the program storage memory 52 , and sends a command to the servo amplifier 71 to drive the servo motor 70 , thereby conveying the workpiece W to the press device 5 .

[0086] The receiving unit 53 receives the synchronization signal transmitted from the line control device 4. The feed control unit 51 drives the feeder device main body 60 based on the synchronization signal.

[0087] (Wire control device 4)

[0088] Figure 5 It is a block diagram showing the configuration of the line control device 4 and the motion generation device 3 .

[0089] The line control device 4 includes a line control unit 41 , a program storage memory 42 , a display monitor 43 , an input keyboard 44 , a receiving unit 45 , and a transmitting unit 46 .

[0090] The line control unit 41 includes a processor and a memory. The processor is, for example, a CPU (Central Processing Unit). Alternatively, the processor may be a processor different from the CPU. The processor executes processing for controlling the punching device 5 and the feeding device 6 according to the program stored in the memory. The memory includes non-volatile memory such as ROM (Read Only Memory) and volatile memory such as RAM (Random Access Memory). The memory may also include an auxiliary storage device such as a hard disk or SSD (Solid State Drive). The memory is an example of a storage medium that can be read in a non-transitory computer. The memory stores programs and data for controlling the punching device 5 and the feeding device 6. In this embodiment, the program storage memory 42 is described as a structure different from the line control unit 41, but it may also be included in the memory of the line control unit 41.

[0091] The program storage memory 42 stores the movement of the press line 2 relative to the group of dies (upper die 7a and lower die 7b) used. The die group used refers to a plurality of dies used in a plurality of press devices 5a, 5b, 5c, and 5d in order to complete a specified product from a workpiece W. The movement of the press line 2 includes the movement of the press devices 5a to 5d and the movement of the feed devices 6a to 6e. The details will be described later, but the program storage memory 42 stores a standard program for executing a pre-set standard movement of the press device 5 and a derivative program for executing a derivative movement created in the movement generation device 3 using the standard movement.

[0092] The display monitor 43 performs a display for selecting a die set to be used, a display for selecting a motion, a display for setting conditions of the press line 2 , a display of an operating status, and the like.

[0093] The operator inputs various settings on the input keyboard 44 , such as selecting a die set to be used or selecting one of a plurality of exercises displayed on the display monitor 23 .

[0094] The receiving unit 45 receives the derived motion created by the motion generating device 3 described later and stores it in the program storage memory 42. The transmitting unit 46 transmits the received derived motion to the press devices 5a to 5d.

[0095] (Motion generation device 3)

[0096] The motion generating device 3 generates derivative motions with different periods based on the standard motion.

[0097] like Figure 5 As shown, the motion generation device 3 includes a receiving unit 31 , a motion generation unit 32 , a display monitor 33 , an input keyboard 34 , a program storage memory 35 , and a transmitting unit 36 .

[0098] The receiving unit 31 receives a standard program for executing the standard movement of the slide 11 stored in the program storage memory 22 of the press control device 20. It should be noted that if the standard program is also stored in the line control device 4, the receiving unit 31 can also receive the standard program from the line control device 4.

[0099] The press control device 20 is provided with a plurality of standard programs for registered die sets. For example, when n die sets can be installed in the press devices 5a to 5d, n standard programs P1 to Pn are pre-set. That is, the standard program P1 corresponding to the die set (1) is pre-set, the standard program P2 corresponding to the die set (2) is pre-set, and the standard program Pn corresponding to the die set (n) is pre-set.

[0100] The motions executed by the press device 5 using the standard programs P1 to Pn are referred to as standard motions M1 to Mn. The standard motions M1 to Mn are set in advance so that the press device 5 and the feeder 6 do not interfere with each other when the corresponding die set is used.

[0101] It should be noted that the standard program is represented as Pi (i=1 to n), and the standard movement is represented as Mi (i=1 to n). It should be noted that n can also be 1. In addition, the description of i=1 to n is appropriately omitted.

[0102] The motion generation unit 32 creates a derivative program Pij (j=1-m) with m derivative motions Mij (j=1-m) having different execution periods based on the standard motion Mi of any standard program Pi of the standard programs P1-Pn. The derivative program of the standard program Pi is represented as Pij (j=1-m), and the derivative motion of the standard motion Mi is represented as Mij (j=1-m). It should be noted that m can also be 1. In addition, the description of j=1-m is appropriately omitted.

[0103] Different cycles refer to different SPM (Shot Per minute). SPM is the number of impacts of the punching device in one minute. The larger the SPM, the shorter (or smaller) the cycle, and the smaller the SPM, the longer (or larger) the cycle. When the standard motion Mi is set to 20SPM as the maximum speed of the punching line 2, for example, a derivative motion Mij such as 19SPM or 18SPM, which is smaller than 20SPM, can be created. For example, a derivative motion Mij can also be created in units of 1SPM or 0.5SPM, up to the SPM of the lowest speed on the specification of the punching line 2. In addition, the number m of derivative motions can also be set according to the user's expectations.

[0104] The motion generation unit 32 includes a processor and a memory. The processor is, for example, a CPU (Central Processing Unit). Alternatively, the processor may be a processor different from the CPU. The processor executes processing for creating the derivative motion Mij according to the program stored in the memory. The memory includes a non-volatile memory such as a ROM (Read Only Memory) and a volatile memory such as a RAM (Random Access Memory). The memory may also include an auxiliary storage device such as a hard disk or an SSD (Solid State Drive). The memory is an example of a storage medium that can be read in a non-transitory computer. The memory stores a program for creating the derivative motion Mij. In this embodiment, the program storage memory 35 is described as a structure different from the motion generation unit 32, but it may also be included in the memory of the motion generation unit 32.

[0105] The program storage memory 35 stores the standard program Pi received by the receiving unit 31. In addition, the program storage memory 35 may also store a derivative program Pij created based on the standard program Pi.

[0106] (Standard Movement Mi)

[0107] Next, the standard motion Mi stored in the press device 5 will be described.

[0108] Figure 6 It is a diagram showing the standard motion Mi executed by the standard program Pi and the derived motion Mij executed by the derived program Pij described later.

[0109] exist Figure 6 In FIG, a standard motion Mi executed by a standard program Pi is illustrated on the far left.

[0110] exist Figure 6 The upper section at the left end of , represents a cycle of stamping action (standard motion Mi) of the slider 11 from the top dead center through the bottom dead center until it reaches the top dead center again.

[0111] At the start time (t0) of the cycle TStd of the standard motion Mi executed by the standard program Pi, the slide 11 is at its top dead center. The press control unit 21 drives the servo motor 15, moving the slide 11 downward. At time t1, the slide 11 reaches the forming area and begins stamping the workpiece W. After reaching its bottom dead center at time t2, the slide 11 moves upward and leaves the forming area at time t3, completing the stamping of the workpiece W.

[0112] It should be noted that the forming region refers to a region where the upper die 7 a contacts the workpiece W placed on the lower die 7 b and where a pressing pressure is applied to the workpiece W.

[0113] During the period from time t1 to time t3, the upper die 7a performs contact molding on the workpiece W. Then, at time t4, the slide 11 returns to the top dead center. This completes one cycle.

[0114] In addition, in the standard motion Mi of the slider 11, the area from the top dead center to the end position of the forming area is referred to as the first area Mi(1), and the area from the end position of the forming area to the next top dead center is referred to as the second area Mi(2). The first area Mi(1) is the area from time t0 (top dead center) to time t2 (bottom dead center) until time t3, and the second area Mi(2) is the area from time t3 to time t4 (top dead center). It should be noted that in Figure 6 In the figure, the time from the top dead center to the bottom dead center in the standard motion Mi is expressed as tBtStd.

[0115] In the standard motion Mi of this embodiment, SPM is set to the maximum value, and the period at this time is expressed as TStd. It should be noted that it can also be said that the time (period) required for one cycle in the standard motion Mi is set to the minimum value.

[0116] exist Figure 6 The middle section on the left end of the servo motor 15 shows the motor speed Vi (an example of the speed of the slider) corresponding to the movement of the slider 11. The motor speed Vi is set to the speed of the standard movement Mi that achieves the maximum SPM. Figure 6 As shown in FIG, when executing the standard motion Mi, the motor speed Vi is accelerated and decelerated. Figure 6 As shown in the middle section of the left end of FIG, the speed of the servo motor 15 is minimum at the top dead center, the speed of the servo motor 15 increases from the top dead center to the bottom dead center, and the speed of the servo motor 15 decreases at the bottom dead center. Then, the speed of the servo motor 15 increases from the bottom dead center to the top dead center and decreases at the top dead center.

[0117] exist Figure 6The lower section shows the ratio Vpi (%) of the speed of the motor performing the motions described in the upper section to the speed of the motor performing the standard motion Mi.

[0118] The graph other than the left end of the lower row shows the ratio of the speed of the motor performing the derived motion Mij (described later) to the speed of the motor performing the standard motion Mi. Figure 6 The lower left section shows the ratio of the speed Vi of the motor performing the standard motion Mi to the speed Vi of the motor performing the standard motion Mi, so the speed ratio Vpi is 100 (%). This 100% speed ratio is represented as the maximum speed ratio. Thus, the maximum speed ratio in the lower left section shows the speed Vi of the motor used to perform the standard motion Mi. In other words, the fact that the speed ratio Vpi is 100% in the standard motion Mi does not mean that the servo motor 15 is continuously rotating at the maximum speed.

[0119] (derivative motion Mij)

[0120] Next, the derived motion Mij created from the standard motion Mi by the motion generating unit 32 will be described.

[0121] exist Figure 6 The right side of the standard motion Mi shows the derivative motion Mij (j=1~m) created based on the standard motion Mi. Figure 6 In the example, the motion is set so that SPM decreases (the period increases) as m increases.

[0122] exist Figure 6 To the right of the standard motion Mi, a derived motion Mi1 with a period of T1 (T1>TStd) is shown. The area from the top dead center to the end position of the forming area in the derived motion Mi1 is referred to as the first area Mi1(1), and the area from the end position of the forming area to the next top dead center is referred to as the second area Mi1(2). The first area Mi1(1) is the area from time t0 (top dead center) to time t2 (bottom dead center) until time t3, and the second area Mi1(2) is the area from time t3 to time t5 (top dead center).

[0123] The derived motion Mi1 maintains the same motion shape in the first region Mi1(1) as the first region Mi(1) of the standard motion Mi, but sets the SPM smaller than that of the standard motion Mi. In the graph representing the derived motion Mi1, the second region Mi(2) of the standard motion Mi is indicated by a dotted line, and time t4 is also indicated.

[0124] The first region Mi1(1) of the derived motion Mi1 is created as the same motion as the first region Mi(1) of the standard motion Mi. Therefore, the time tBt1 from the top dead center to the bottom dead center of the derived motion Mi1 is set to the same time as the time tBtStd from the top dead center to the bottom dead center of the standard motion Mi.

[0125] The second area Mi1(2) of the derived motion Mi1 is set to have a longer time than the second area Mi(2) of the standard motion Mi.

[0126] More specifically, if Figure 6 As shown in the speed ratio Vp1 of the lower section of the second column from the left end and the motor speed V1 in the middle section, within the range of the second area Mi1 (2), the motor speed is reduced from the motor speed Vi of the standard movement Mi to a certain extent, and then restored to the motor speed Vi of the standard movement Mi. As a result, Figure 6 As shown on the upper side, it becomes the time extension movement of the second area Mi (2) of the standard movement Mi. In this way, by temporarily slowing down the motor speed from the motor speed Vi of the standard movement Mi, the period is made T1 (>TStd). Therefore, the time t5 at which the top dead center is reached in the derived movement Mi1 is delayed compared to the time t4. It should be noted that the deceleration and acceleration of the punching speed can be determined according to the capacity of the punching device 5. In addition, the extent to which the punching speed is reduced can be determined according to the length of the period, the deceleration and acceleration of the punching speed. Within the range of the second area Mi1 (2), the time point when the punching speed starts to slow down compared to the speed of the standard movement Mi is expected to be after the time point when the slider rises to a height where it is impossible to interfere with the feeding device (the conveying area R1 described later).

[0127] As described above, in order to further extend the time of the second region Mi1(2) of the derived motion Mi1 compared to the second region Mi(2) of the standard motion Mi, the speed V1 of the servo motor 15 is decelerated compared to the speed Vi of the standard motion Mi, and then accelerated before reaching the top dead center at time t5, returning to the speed Vi of the standard motion Mi. Thus, since the slider 11 can be driven from the top dead center at the same speed as the standard motion Mi during the next cycle, the first region Mi1(1) of the derived motion Mi1 can be made the same as the first region Mi(1) of the standard motion Mi. Therefore, the derived motion Mi1 can be made to have a longer cycle than the standard motion while maintaining the same molding accuracy as the standard motion.

[0128] exist Figure 6To the right of the derived motion Mi1, there is a derived motion Mi2. The area from the top dead center of the derived motion Mi2 to the end position of the forming area is referred to as the first area Mi2(1), and the area from the end position of the forming area to the next top dead center is referred to as the second area Mi2(2). The first area Mi2(1) is the area from time t0 (top dead center), beyond time t2 (bottom dead center) to time t3, and the second area Mi2(2) is the area from time t3 to time t6 (top dead center).

[0129] The derived motion Mi2 maintains the same motion shape as the first region Mi2(1) of the standard motion Mi, but the SPM is set smaller than that of the derived motion Mi1. In the graph representing the derived motion Mi2, the second region Mi(2) of the standard motion Mi is indicated by a dotted line, and time t4 is also indicated.

[0130] The derived motion Mi2 is created so that the first region Mi2(1) is the same as the first region Mi(1) of the standard motion Mi. Therefore, the time tBt2 from the top dead center to the bottom dead center of the derived motion Mi2 is set to the same time as the time tBtStd from the top dead center to the bottom dead center of the standard motion Mi.

[0131] The second region Mi2(2) of the derived motion Mi2 is set to a longer time than the second region Mi(2) of the standard motion Mi and the second region Mi1(2) of the derived motion Mi1. Therefore, the time t6 at which the derived motion Mi1 reaches the top dead center is delayed compared to times t4 and t5. It should be noted that the details of extending the time of the second region Mi2(2) of the derived motion Mi2 are the same as those of extending the time of the second region Mi1(2) of the derived motion Mi1, and therefore, the description thereof is omitted.

[0132] As described above, in order to make the second area Mi2(2) in the derived motion Mi2 further extend the time than the second area Mi1(2) of the derived motion Mi1 and the second area Mi(2) of the standard motion Mi, as shown in FIG. Figure 6 As shown in the speed ratio Vp2 in the lower section of the third column from the left end and the motor speed V2 in the middle section, the speed V2 of the servo motor 15 is decelerated compared to the speed Vi of the standard motion Mi and the speed V1 of the derived motion M1, and is accelerated before the moment t5 when the top dead center is reached, and is restored to the speed Vi of the standard motion Mi.

[0133] In this way, derivative motions Mij (j=1 to m) are created so that the SPM is sequentially reduced. In this embodiment, creation is performed until the derivative motion Mim with the lowest SPM of the press line 2 is reached. When the SPM of the standard motion Mi is 20, the lowest SPM is 16, and the creation interval of the derivative motion Mij is set to 1 SPM, m is 4. In this case, a derivative motion Mi1 with an SPM of 19, a derivative motion Mi2 with an SPM of 18, a derivative motion Mi3 with an SPM of 17, and a derivative motion Mi4 with an SPM of 16 are generated.

[0134] Similar to the above-mentioned derived motions Mi1 and Mi2, the area from the top dead center of the derived motion Mim to the end position of the forming area is referred to as the first area Mim(1), and the area from the end position of the forming area to the next top dead center is referred to as the second area Mim(2). The first area Mim(1) is the area from time t0 (top dead center) to time t2 (bottom dead center) until time t3, and the second area Mim(2) is the area from time t3 to time t(4+m) (top dead center). It should be noted that time t(4+m) represents the time when the derived motion Mim reaches the top dead center. When m is 1, it is time t5 shown in the derived motion Mi1, and when m is 2, it is time t6 shown in the derived motion Mi2. In addition, when m is 4, the time when the other derived motions Mi1, Mi2, and Mi3 reach the top dead center can be represented as t5, t6, and t7, so time t(4+m) is t8.

[0135] The derived motion Mim maintains the same motion shape in the first region Mim(1) as the first region Mi(1) of the standard motion Mi, and SPM is set to the minimum. It should be noted that in the graph representing the derived motion Mim, the second region Mi(2) of the standard motion Mi is indicated by a dotted line, and time t4 is also indicated.

[0136] The derived motion Mim is created so that its first region Mim(1) is the same motion as the first region Mi(1) of the standard motion Mi. Therefore, the time tBtm from the top dead center to the bottom dead center of the derived motion Mim is set to the same time as the time tBtStd from the top dead center to the bottom dead center of the standard motion Mi.

[0137] The second region Mim(2) of the derived motion Mim is set to a longer time than the second region Mi(2) of the standard motion Mi and other derived motions Mij (j=1 to m-1). Therefore, the time t(4+m) at which the derived motion Mim reaches the top dead center is delayed compared to the time t(4+m) at which the other derived motions reach the top dead center. It should be noted that the details of extending the time of the second region Mim(2) of the derived motion Mim are the same as those of extending the time of the second region Mi1(2) of the derived motion Mi1 described above, and therefore, the description thereof will be omitted.

[0138] In addition, in order to make the second area Mim(2) in the derived motion Mim further extend the time than the second area Mi(2) of the standard motion Mi, as shown in FIG. Figure 6 As shown in the speed ratio Vpm in the lower section at the right end and the motor speed Vm in the middle section, the speed Vm of the servo motor 15 is decelerated compared to the speed of the standard motion Mi and other derived motions Mij (j=1~m-1), and is accelerated before reaching the top dead center moment t(4+m), and is restored to the speed of the standard motion Mi.

[0139] It should be noted that, in the above description, the first region of the derived motion Mij is represented as Mij(1), and the second region is represented as Mij(2).

[0140] return Figure 5 The display monitor 33 is displayed for setting the interval of the SPM of the generated derived motion. Furthermore, while it is possible to generate derived motion up to the minimum SPM of the press line 2 specification, it is also possible to display the display monitor 33 for inputting the value of the SPM of the generated derived motion. Furthermore, it is also possible to display the display monitor 33 for inputting the value of m.

[0141] The operator inputs various settings on the input keyboard 34, such as the interval of the SPM for creating the derived motion, the value of the SPM, or the value of m.

[0142] The sending unit 36 sends the derived program ij for executing the derived motion Mij created by the motion generating unit 32 to the line control device 4. The line control device 4 stores the received derived program ij in the program storage memory 42 and sends it to the press control unit 21 of the press control device 20. The press control unit 21 stores the received derived program ij in the program storage memory 22.

[0143] (Motion Generation Method)

[0144] Next, a method in which the motion generating unit 32 creates the derived motion Mij based on the standard motion Mi will be described.

[0145] Figure 7 This is a flowchart showing the operation of the motion generation device 3 .

[0146] First, in step S10, the operator selects any standard motion Mi from among the plurality of standard motions Mi (i=1 to n) stored in the press device 5 using the display monitor 33 and the input keyboard 34. As described above, the standard motion Mi corresponds to the die set (i).

[0147] Next, in step S20, the receiving unit 31 receives the standard program Pi for executing the standard motion Mi selected from the stamping control device 20 of the stamping device 5. It should be noted that the motion generating device 3 may not obtain the standard program Pi from the stamping control device 20 wirelessly or wiredly, but may also store the standard program Pi in a storage medium such as an SD card and obtain the standard program Pi from the storage medium. In addition, the standard program Pi is not limited to the stamping device 5, and may also be obtained from other devices that store the standard program Pi. The receiving unit 31 is an example of an acquisition unit that obtains the standard motion Mi.

[0148] Next, in step S30, the operator sets the creation conditions of the derived motion Mij (j=1-m) using the display monitor 33 and the input keyboard 34. The creation conditions include, for example, the interval of the SPM for creating the derived motion Mij (j=1-m) and the value of m.

[0149] Next, in step S40, the motion generation unit 32 creates derived motions Mij from the standard motion Mi based on the creation conditions. For example, if the SPM of the standard motion Mi is set to 20, the minimum SPM is set to 17, and the SPM interval is set to 1, three derived motions Mij (j = 1 to 3) with SPMs of 19, 18, and 17 are created. Alternatively, if the value of m is set to 3 and the SPM interval is not set, three derived motions Mij (j = 1 to 3) with SPMs of 19, 18, and 17 are also created.

[0150] When creating the derived motion Mij, the motion generating unit 32 forms the first region Mij(1) in the same manner as the first region Mi(1) of the standard motion Mi. In addition, in order to achieve the desired SPM, for the second region Mi(2) of the standard motion Mi, the punching speed is reduced from the maximum speed to a certain extent, and then restored to the maximum speed again, thereby creating the second region Mij(2). The deceleration and acceleration of the punching speed can be determined according to the capability of the punching device 5. In addition, the extent to which the punching speed is reduced can be determined according to the length of the cycle, the deceleration and acceleration of the punching speed. The time point at which the punching speed begins to decelerate within the range of the second region Mi1(2) is expected to be after the time point at which the slider rises to a height at which it is impossible to interfere with the feeding device (conveyance region R1).

[0151] In addition, if Figure 6 As shown, although the position of the slider 11 approaches the top dead center smoothly in the second region Mij(2), the position is not limited to a smooth shape because the punching speed is changed.

[0152] In this way, the derived program Pij that executes the derived motion Mij and the speed change of the slider is created according to the number of set creation conditions.

[0153] Next, in step S50 , the transmitting unit 36 associates the derived motion Mij (j=1 to m) with the die set (i) and transmits it to the line controller 4 .

[0154] The transmitted derived motion Mij is stored as a derived program Pij in the program storage memory 42 in the line control device 4 , and is also transmitted from the transmission unit 46 to the press control device 20 and stored in the program storage memory 22 .

[0155] (Press line operation)

[0156] The line control device 4 sends synchronization signals to the plurality of punching devices 5a, 5b, 5c, and 5d and the plurality of feeding devices 6a, 6b, 6c, 6d, and 6e to achieve synchronization.

[0157] Figure 8 (a) is a diagram showing the relationship between the operations of the press devices 5a, 5b, 5c, and 5d and the operations of the feed devices 6b, 6c, and 6d. Figure 8 (b) is a schematic side view for explaining the operation of the feeding device 6.

[0158] like Figure 8As shown in (b), the home position is defined as the intermediate position between the upstream and downstream positions in the conveying direction X. The action of moving the conveying rod 68 from the home position to the upstream position is defined as RT2 (return 2) action, the action of conveying the workpiece W from the upstream position to the downstream position is defined as ADV (advance) action, and the action of moving the conveying rod 68 from the downstream position to the home position is defined as RT1 (return 1) action.

[0159] The upstream position is, for example, the feed position of the workpiece W conveyed by the belt conveyor in the case of the feed device 6a, and is the position of the mold of the upstream punching device 5 in the case of the feed devices 6b, 6c, 6d, and 6e. In addition, the downstream position is, for example, the discharge position of the product discharged by the belt conveyor in the case of the feed devices 6e, and is the position of the mold of the downstream punching device 5 in the case of the feed devices 6a, 6b, 6c, and 6d.

[0160] In this way, the feeding device 6 repeats the RT2 action, the ADV action, and the RT1 action.

[0161] The punching devices 5a, 5b, 5c, and 5d are synchronized with the feeding devices 6b, 6c, 6d, and 6e by starting at a predetermined time difference from the start timing of the feeding device 6a on the far upstream side. For example, at predetermined intervals from the time when the feeding device 6a starts moving from its home position, the slides 11 of the punching devices 5a, 5b, 5c, and 5d start moving from the top dead center to the bottom dead center. Furthermore, at predetermined intervals from the time when the feeding device 6a starts moving from its home position, the feeding devices 6b, 6c, 6d, and 6e start moving in sequence.

[0162] Therefore, the punching devices 5a, 5b, 5c, and 5d and the feeding devices 6b, 6c, 6d, and 6e are driven with a predetermined time difference.

[0163] Figure 8 (a) is a diagram showing the relationship between the operations of the press devices 5a, 5b, 5c, 5d and the feed devices 6b, 6c, 6d during operation at 16 spm. At 16 spm, the period ti of the press device 5 is 3.75 seconds.

[0164] The standard motions Mi of the press devices 5a, 5b, 5c, and 5d are shown in the figure. The timing of driving the press devices 5a, 5b, 5c, and 5d from the top dead center to the bottom dead center is set to a predetermined interval ts.

[0165] in addition, Figure 8(a) shows the transport region R1. The transport region R1 represents the region near the top dead center of the slide 11. When transporting a workpiece W between presses 5, the workpiece W is removed and disposed when the slide 11 of the press 5 is positioned near the top dead center.

[0166] For example, the feeding device 6b that transports the workpiece W from the stamping device 5a to the stamping device 5b takes out the workpiece W from the stamping device 5a when the stamping device 5a passes the bottom dead point and reaches the vicinity of the conveying area R1, and arranges the workpiece W on the stamping device 5b before the stamping device 5b moves from the top dead point to the bottom dead point and descends from the conveying area R1.

[0167] The position where the slide 11 reaches the conveyance region R1 is indicated as P2. The conveyance region R1 is set within a height range of the slide 11 where the press device 5 and the feed device 6 do not interfere with each other.

[0168] like Figure 8 As shown in (a), since a feeding device 6b is arranged between the punching device 5a and the punching device 5b, when describing the relationship between the actions of the three devices, when the slider 11 of the punching device 5a reaches the specified position P1 halfway between the top dead center and the bottom dead center, the slider 11 of the punching device 5b starts to move from the top dead center to the bottom dead center, and the feeding device 6b ends the ADV action and starts the RT1 action. At this time, since the position of the slider 11 of the punching device 5b is within the conveying area R1 (near the top dead center), even if the feeding device 6b arranges the workpiece W in the punching device 5b on the downstream side, no interference will occur.

[0169] Next, when the slide 11 of the press device 5a reaches the bottom dead center, the slide 11 of the press device 5b reaches the position P1, and the feeder device 6b performs the RT1 operation.

[0170] Next, when the slide 11 of the press device 5b reaches the bottom dead center, the slide 11 of the press device 5a moves from the bottom dead center to the top dead center, and the feeder 6b ends the RT1 operation and starts the RT2 operation.

[0171] Next, when the slide 11 of the punching device 5a reaches position P2, the slide 11 of the punching device 5b moves from the bottom dead center to the top dead center, the feeder 6b ends the RT2 operation, and starts the ADV operation. At this time, because the position of the slide 11 of the punching device 5a is within the conveying area R1 (near the top dead center), even if the feeder 6b removes the workpiece W after the punching process from the punching device 5a, no interference will occur.

[0172] Next, when the slide 11 of the punching device 5a reaches the top dead center, the above cycle is repeated.

[0173] In this way, the start timing of the action of the feeding device 6b is integrated with the movement of the upstream and downstream punching devices 5a and 5b. Specifically, the timing when the feeding device 6b ends the ADV action and starts the RT1 action is the same as the timing when the slider 11 of the punching device 5a reaches the position P1. The timing when the feeding device 6b ends the RT1 action and starts the RT2 action is the same as the timing when the slider 11 of the punching device 5b reaches the bottom dead center. The timing when the feeding device 6b ends the RT2 action and starts the ADV action is the same as the timing when the slider 11 of the punching device 5a reaches the position P2.

[0174] The relationship among the operations of the above-mentioned punching device 5a, feeding device 6b and punching device 5b is the same as the relationship among the operations of the punching device 5b, feeding device 6c and punching device 5d, and the relationship among the operations of the punching device 5c, feeding device 6d and punching device 5c.

[0175] In this way, the operation of the feeding device 6 is based on the movement of the punching devices 5 on the upstream and downstream sides.

[0176] Figure 9 (a) means Figure 8 (a) A diagram showing the relationship between the operations of the punching devices 5a, 5b, 5c, 5d and the feeding devices 6b, 6c, 6d in the same standard motion Mi of 16 SPM. Figure 9 (b) is a diagram showing the relationship between the operations of the punching devices 5a, 5b, 5c, 5d and the feeding devices 6b, 6c, 6d in the derived motion Mij of 12 SPM. In 12 SPM, the cycle tij of the punching device 5 is 5.00 seconds.

[0177] Figure 9 (b) shows the derived motion Mij. Figure 6 As shown, the derived motion Mij is created so that its first area is identical to the first area of the standard motion Mi. Figure 9 In the derived motion Mij of (b), the time during which the slide 11 is located in the conveying region R1 , that is, near the top dead center, is set to be longer than that of the standard motion Mi. Figure 9 The derivative motion Mij shown in (b) is an example in which the punching speed starts to decelerate after the slider 11 rises to a height where it is unlikely to interfere with the feeder 6 within the second region Mij(2).

[0178] In order to reduce the SPM value of the punching line 2, even if the movement of the punching devices 5a, 5b, 5c, and 5d is changed to the derived motion Mij, the movement of the slider 11 from the top dead center to the position P2 (the position reaching the conveying area R1) is the same as the standard motion Mi.

[0179] As described above, the timing of each action of the feeding devices 6b, 6c, and 6d is coordinated with the movement of the slider 11 of the punching device 5 on the upstream and downstream sides from the top dead center to the position P2 (the position reaching the conveying area R1).

[0180] Therefore, even when the movement of the punching device 5 is changed from the standard movement Mi to the derived movement Mij, interference with the punching device 5 can be avoided simply by slowing down the speed of the ADV action of the feeding device 6. Therefore, the SPM of the punching line 2 can be reduced without the need for large-scale program changes.

[0181] It should be noted that in Figure 9 In (b), the derived motion Mij is set to be the same as the standard motion Mi, from the top dead center, beyond the bottom dead center to the position P2, but this is not limited to this, and the motion from the top dead center to the end position of the forming area can also be the same.

[0182] In this case, when explaining the relationship between the punching device 5a, the feeding device 6b and the action of the punching device 5b, because the time for the slider 11 of the punching device 5a to reach the position P2 from the top dead center changes, it is sometimes necessary to change the timing of the feeding device 6b ending the RT2 action and starting the ADV action through the punching line 2.

[0183] In this case, the timing of ending the RT2 action and starting the ADV action of the feeding device 6 needs to be changed. However, the timing of ending the ADV action and starting the RT1 action and the timing of ending the RT1 action and starting the RT2 action are the same in the standard movement Mi.

[0184] Therefore, when the movement from the top dead center to the end position of the forming area is made the same as the standard movement Mi, Figure 9 Compared to the case where the movement from the top dead center to position P2 is made the same as the standard movement Mi, as shown in (b), the program changes increase because the start timing of the ADV action is changed. However, when the movement from the top dead center to the end position of the forming area is made the same as the standard movement Mi, there is no need to change the start timing of the RT1 action and the start timing of the RT2 action, compared to the case where the movement from the top dead center to the end position of the forming area is changed, so the program changes can be reduced. In other words, even when only the movement from the top dead center to the end position of the forming area is made the same as the standard movement Mi, the speed of the press line 2 can be changed with only a few program changes.

[0185] Features (1)

[0187] The motion generating device 3 of the present embodiment is a motion generating device for generating the motion of the slider 11 of the punching device 5 having the slider 11 to which the upper mold 7a is mounted, the pad 12 to which the lower mold 7b is mounted, and the servo motor 15 for reciprocating the slider 11 in the vertical direction, and the motion generating device includes a motion generating unit 32. The motion generating unit 32 makes the standard motion Mi (an example of the first motion) of the slider 11 in the period TStd (an example of the first period) uniform, including at least the first region Mim (1) (an example of a prescribed portion) from the top dead center to the end position of the forming region, and makes the speed of the slider 11 at the top dead center the same as the speed of the standard motion Mi, and generates the derived motion Mim (an example of the second motion) of the slider 11 in the period Tm (an example of the second period) different from the period TStd.

[0188] When generating the derived motion Mim with a different period based on the standard motion Mi set in advance so as not to interfere with the operations of the punching device 5 and the feeding device 6, the same motion as the standard motion Mi is set from the top dead center to the bottom dead center.

[0189] Therefore, when the punching device 5 is moved with the derived motion Mim, although a minor program change may be required, interference between the punching device 5 and the feeding device 6 can be avoided by maintaining the time difference between the punching device 5 and the feeding device 6 in the same way as the standard motion Mi.

[0190] Therefore, the speed of the press line 2 can be easily changed without having to make a large-scale program change or the like of the entire press line 2 .

[0191] In addition, since the movement of the molding area of the derived motion Mim is the same as the movement of the molding area of the standard motion Mi, even when the motion is changed to change the cycle, the same molding accuracy as the standard motion Mi can be maintained.

[0192] As described above, the speed of the press line can be easily changed while maintaining the forming accuracy.

[0193] In addition, since the derived motion Mim is created by making the speed of the slider 11 at the top dead center the same as the speed of the standard motion Mi, there is no need to increase the speed between the top dead center and the bottom dead center to match the speed of the standard motion Mi, so the movement from the top dead center to the bottom dead center of the standard motion Mi can also be realized in the derived motion Mim.

[0194] It should be noted that in the derived motion Mim, instead of making the speed when reaching the top dead center consistent with the speed of the standard motion Mi, deceleration is still performed. In this case, acceleration is required when moving from the top dead center to the bottom dead center. Therefore, the motion from the top dead center to the bottom dead center changes compared to the standard motion Mi.

[0195] Figure 10 The figure shows the derived motion Mi2' which is not made to match the speed of the standard motion Mi when reaching the top dead center, but is still decelerated. As shown by the motor speed V2' and the speed ratio Vp2', in the derived motion Mi2', the motor speed V2' and Figure 6 Unlike the derived motion Mi2 described in , deceleration is still performed in the second region Mi2(2)', and the vehicle is in a decelerating state even at the top dead center (time t6').

[0196] Therefore, when moving from the top dead center (time t0) to the bottom dead center, the motor must accelerate to match the speed of the standard motion Mi. Therefore, the time t2' at the bottom dead center is delayed compared to t2, and the time tBt2' from the top dead center to the bottom dead center is also delayed compared to tBt2. Similarly, the times t1' to t3' in the forming area are also delayed compared to the times t1 to t3.

[0197] In this way, although a derivative motion is created to change the speed of the stamping line 2, when the movement of the part of the derivative motion including the top dead center to the end position of the forming area changes compared with the standard motion, it cannot be responded to only by extending the forward time of the feeding device 6, and sometimes it is necessary to change the program of the entire stamping line 2.

[0198] In contrast, because the derived motion Mim generated by the motion generating device 3 of this embodiment includes the motion of the portion from the top dead center to the end position of the forming area that is the same as the standard motion Mi, as described above, although a smaller program change is required, the speed of the stamping line 2 can be changed by maintaining the time difference between the stamping device 5 and the feeding device 6 in the same manner as the standard motion.

[0199] In the motion generation device 3 of this embodiment, the period Tm (an example of the second period) is longer than the period TStd (an example of the first period). The motion generation unit 32 generates the derived motion Mim (an example of the second motion) by reducing the speed of the servo motor 15 relative to the standard motion Mi (an example of the first motion) in a portion other than the first region Mi(1) (an example of the predetermined portion).

[0200] By operating the press device 5 using the derived motion Mim generated in this way, it is possible to extend the cycle, that is, reduce the SPM (shot per minute). (3)

[0202] In the motion generating device 3 of this embodiment, the period Tm is longer than the period TStd. Figure 6As described, the motion generating unit 32 further decelerates the slider 11 in the portion outside the first area Mim (1) (an example of a prescribed portion) compared to the standard motion Mi, and then returns to the same speed as the standard motion Mi before reaching the top dead center, thereby generating a derived motion Mim.

[0203] This makes it possible to extend the duration of the portion other than the portion from the top dead center to the bottom dead center in the standard motion Mi. Therefore, it is possible to generate a derived motion Mim having a longer period than the standard motion Mi. (4)

[0205] In the motion generating device 3 of the present embodiment, the first region Mim(1) (an example of a predetermined portion) includes a range (conveying region R1) from the top dead center to the height of the slider 11 where it does not interfere with the feeder 6 that conveys or delivers the workpiece W to the press device 5. The motion generating unit 32 generates the derived motion Mim (an example of a second motion) by reducing the speed of the slider 11 relative to the standard motion Mi (an example of a first motion) within the height range of the slider 11 where no interference occurs.

[0206] Therefore, if Figure 9 As shown in (b), the SPM of the press line 2 can be easily changed simply by extending the ADS operation time of the feeder 6. (5)

[0208] The punching device 5 of this embodiment is a punching device that uses an upper die 7a and a lower die 7b to punch a workpiece W. The punching device 5 includes: a slider 11, a pad 12, a servo motor 15, a program storage memory 22 (an example of a storage unit), and a punching control unit 21 (an example of a control unit). The slider 11 is mounted with the upper die 7a. The pad 12 carries the lower die 7b. The servo motor 15 causes the slider 11 to reciprocate in the vertical direction. The program storage memory 22 stores a derived motion Mim (an example of a second motion) different from the period TStd, which makes the standard motion Mi (an example of a first motion) of the slider 11 in the period max (an example of a first period) at least including the first area Mi (1) (an example of a prescribed portion) from the top dead center to the end position of the forming area the same, and makes the speed of the slider 11 at the top dead center the same speed as the standard motion Mi. The punching control unit 21 drives the servo motor 15 so that the slider 11 moves in the derived motion Mim.

[0209] When generating a derived motion Mim having a cycle different from the standard motion Mi preset so that the punching device 5 and the feeding device 6 do not interfere with each other, the same motion as the standard motion Mi is set from the top dead center to the bottom dead center.

[0210] Therefore, when the punching device 5 is moved with the derived motion Mim, although a smaller program change is required, interference between the punching device 5 and the feeding device 6 can be avoided by maintaining the time difference between the punching device 5 and the feeding device 6 in the same way as the standard motion Mi.

[0211] Therefore, the speed of the press line 2 can be easily changed without having to make a large-scale program change or the like of the entire press line 2 . (6)

[0213] The motion generation method of the present embodiment is a motion generation method for generating the motion of the slider 11 of the punching device 5 having the slider 11 mounted with the upper mold 7a, the pad 12 carrying the lower mold 7b, and the servo motor 15 for reciprocating the slider 11 in the up-down direction, and the motion generation method has a step S40 (an example of a motion generation step). Step S40 makes the standard motion Mi (an example of a first motion) of the slider 11 in the cycle TStd (an example of a first cycle) at least the first area Mi (1) (an example of a prescribed portion) from the top dead center to the end position of the forming area the same, and makes the speed of the slider 11 at the top dead center the same speed as the standard motion Mi, and generates the derived motion Mim (an example of a second motion) of the slider 11 in the cycle Tm (an example of a second cycle) different from the cycle TStd.

[0214] When generating a derived motion Mim having a cycle different from the standard motion Mi preset so that the punching device 5 and the feeding device 6 do not interfere with each other, the same motion as the standard motion Mi is set from the top dead center to the bottom dead center.

[0215] Therefore, when the punching device 5 is moved with the derived motion Mim, although a smaller program change is required, interference between the punching device 5 and the feeding device 6 can be avoided by maintaining the time difference between the punching device 5 and the feeding device 6 in the same way as the standard motion Mi.

[0216] Therefore, there is no need to make large-scale program changes to the entire press line 2, and the speed of the press line 2 can be easily changed. It should be noted that, as mentioned above, the time point when the stamping speed begins to decelerate is preferably after the slider rises to a height at which it is impossible for the slider to interfere with the feeding device. Thus, from the top dead center to this time point, the derived motion Mim is completely consistent with the standard motion Mi, and there is no need to make large-scale program changes to the entire press line 2, and interference between the slider and the feeding device can be more reliably avoided.

[0217] <Other embodiments>

[0218] While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and various modifications can be made without departing from the spirit of the invention. In particular, the multiple embodiments and modifications described in this specification can be arbitrarily combined as needed.

[0219] (A)

[0220] In the above embodiment, a tandem press line 2 is used for explanation, but it is not limited to the tandem type and a transfer type press line may also be used. In a transfer type press line, a plurality of upper dies 7a and lower dies 7b are arranged in one press unit 5, and the workpiece W is sequentially conveyed from the upstream die to the downstream die by transfer feeding.

[0221] In a transfer-type press machine, the speed of the press line can be easily changed by generating a derived motion by making the motion from the top dead center to the bottom dead center the same as the standard motion.

[0222] (B)

[0223] In the above embodiment, the motion generating device 3 and the punching device 5 are provided separately, but the motion generating device 3 may be incorporated into the punching device 5 . Figure 11 This figure shows a configuration in which a motion generating unit 32 is provided in a press control device 20 ′ of a press device 5 ′.

[0224] (C)

[0225] In the above embodiment, the feeder device 6 is shown as an example of the conveying device, but the present invention is not limited thereto and may be a conveyor belt or the like. In short, any conveying device may be used as long as it is arranged on a line including a press device.

[0226] (D)

[0227] In the above embodiment, the derived motion Mij (j=1-m) is created so that its first area Mim(1) is the same as the first area Mi(1) of the standard motion Mi. However, it is sufficient to make the motion from at least the top dead center to the bottom dead center the same. This makes it easy to change the speed of the press line.

[0228] (E)

[0229] In the above embodiment, the standard movement Mi is set to the movement of the slider 11 at the maximum SPM in the specification, but the present invention is not limited thereto and may be a movement other than the maximum SPM.

[0230] (F)

[0231] In the above embodiment, the derived motions Mij (j=1-m) created by the motion generation device 3 have a smaller SPM than the standard motion Mi, but the present invention is not limited to this. For example, if the standard motion Mi is not the motion with the maximum SPM according to the specifications, a derived motion Mij (j=1-m) with a larger SPM than the standard motion Mi may be created.

[0232] (G)

[0233] In the above embodiment, in the second region Mij(2) (j=1-m) of the derived motion Mij (j=1-m), the motor speed is decelerated once and then accelerated once compared to the motor speed of the standard motion Mi, so that the motor speed reaches the same speed as the standard motion Mi when it reaches the top dead center. However, the present invention is not limited to this. For example, the acceleration and deceleration of the motor speed may be repeated multiple times in the second region Mij(2), or acceleration and deceleration may be performed in stages. In short, it is sufficient as long as the motor speed at the top dead center in the derived motion Mij is the same as the motor speed of the standard motion Mi.

[0234] (H)

[0235] In the above embodiment, the derived program Pij (j=1~m) that executes the derived motion Mij (j=1~m) is temporarily sent to the wire control device 4 and stored in the punching device 5 by the wire control device 4, but it can also be sent directly to the punching device 5 without going through the wire control device 4.

[0236] (I)

[0237] In the above embodiment, a crank mechanism is used as the slider driving portion 13 , but a link mechanism may be used.

[0238] Industrial Applicability

[0239] The motion generating device disclosed in the present invention has the effect of being able to easily change the speed of a press line, and is useful for tandem presses, transfer presses, and the like used in sheet metal processing.

[0240] Description of Reference Numerals

[0241] 3 motion generating device; 5 punching device; 7a upper die; 7b lower die; 11 slider; 12 pad; 32 motion generating part.

Claims

1. A motion generating device for generating motion of a slider of a punching device, wherein the punching device comprises a slider to which an upper die is mounted, a backing plate on which a lower die is mounted, and a servo motor for reciprocating the slider in an up-and-down direction, wherein the motion generating device is characterized in that: The motion generating device generates a second motion as a derivative motion having a longer period than the standard motion based on the first motion as the motion of the press line relative to the set of dies used, that is, the standard motion. The motion generating device comprises a motion generating unit, The motion generating unit makes the first motion of the slider in the cycle of the standard motion, i.e., the first cycle, at least including the area from the top dead center to the end position of the molding area, i.e., the first area, the same as the standard motion, and makes the motor speed of the servo motor at the top dead center the same motor speed as the first motion, and by temporarily slowing down the motor speed compared with the motor speed of the standard motion in the area after crossing the first area and reaching the top dead center again, i.e., the second motion as the derivative motion of the slider is generated with a second cycle longer than the cycle of the standard motion, i.e., the first cycle.

2. The motion generating device according to claim 1, wherein: The second period is longer than the first period, The motion generating unit generates the second motion by reducing the motor speed compared to the first motion in a portion from the top dead center to a portion other than the end position of the forming area.

3. The motion generating device according to claim 1, wherein: The second period is longer than the first period, The motion generating unit generates the second motion by reducing the speed of the motor compared to the first motion in a portion from the top dead center to a position other than the end position of the forming area and returning the motor speed to the same speed as the first motion before reaching the top dead center.

4. The motion generating device according to claim 2 or 3, characterized in that: The motion generating unit has the same range from the top dead center to the height of the slider that does not interfere with the feeding device that conveys or delivers the workpiece to the punching device during the first motion. The second motion is generated by reducing the motor speed relative to the first motion within a range of the height of the slider where the interference does not occur.

5. A punching device for punching a workpiece using an upper die and a lower die, the punching device being characterized by: a slider on which the upper die is mounted; a backing plate on which the lower mold is placed; A servo motor that causes the slider to reciprocate in an up-and-down direction; Movement Generation Department; The motion generating unit generates a second motion as a derivative motion having a longer period than the standard motion based on a first motion as a standard motion of the press line relative to the set of dies used. The motion generating unit makes at least the area from the top dead center to the end position of the forming area in the first motion of the slider in the first cycle of the standard motion the same as the standard motion, and makes the motor speed of the servo motor at the top dead center the same motor speed as that of the first motion, and generates the second motion as the derivative motion which is longer than the first cycle of the standard motion by temporarily slowing down the motor speed in the area where the top dead center is reached again after crossing the first cycle, i.e., the second cycle. a storage unit configured to store the second motion having a longer period than the first motion; A control unit drives the servo motor to move the slider in the second motion.

6. The punching device according to claim 5, characterized in that The present invention further includes a motion generating unit configured to generate the second motion by making at least the end position from the top dead center to the forming area the same in the first motion.

7. A motion generation method for generating the motion of a slider of a punching device, wherein the punching device comprises a slider to which an upper die is mounted, a backing plate on which a lower die is mounted, and a servo motor for reciprocating the slider in an up-and-down direction, the motion generation method being characterized in that: The method comprises a motion generating step of generating a second motion as a derivative motion having a longer period than the standard motion based on a first motion as a standard motion of the press line relative to the set of dies used, The motion generating step makes at least the area from the top dead center to the end position of the forming area in the first motion of the slider in the cycle of the standard motion, i.e., the first cycle, the same as the standard motion, and makes the motor speed of the servo motor at the top dead center the same motor speed as the first motion, and by temporarily slowing down the motor speed compared with the motor speed of the standard motion in the area after crossing the first area and reaching the top dead center again, i.e., the second motion as the derivative motion of the slider is generated with a second cycle longer than the cycle of the standard motion, i.e., the first cycle.

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