Movement setting method of multi-station press and multi-station press

Abstract

The present invention provides a multi-station press machine that can improve production efficiency. The multi-station press machine (1) has a press machine (2) that raises and lowers a slide block (6) according to a punching motion, and a transport device (10) that moves a retaining member (12) according to a transfer motion to transport a workpiece (100). The multi-station press machine (1) has a production unit (32), a judgment unit (34), and a phase adjustment unit (35). The production unit (32) produces a three-dimensional action surface based on a temporarily set punching motion (PM) and a temporarily set transfer motion (TM). The judgment unit (34) compares a standard upper die interference surface and an action surface in the same three-dimensional coordinate system to determine whether the action surface is within an interference region of the standard upper die interference surface. The phase adjustment unit (5) changes the relative phase of the transfer motion relative to the punching motion when the action surface is within the interference region.

Description

Technical Field

[0001] The invention relates to a motion setting method of a multi-station press and the multi-station press. Background Art

[0002] A multi-station press consists of a press that performs stamping and a transport device that transports the workpiece (material). The press has multiple stamping stations, and the slide is raised and lowered while the die is used to perform stamping (punching, bending, stretching, etc.) on the workpiece. The slide moves up and down with the stamping movement.

[0003] One transport device (sometimes called a "transfer feeder") uses a retaining member (hook or cup, etc.) provided on a feed rod to hold the workpiece, moves the feed rod in two or three dimensions, and transports the workpiece to each stamping processing station.

[0004] In a multi-station press, the press and the transport device need to be synchronized for good processing efficiency and to prevent mutual interference. In recent years, servo motors have been used as the driving source for presses and transport devices, requiring high SPM (Stroke Per Minutes) to improve productivity and complex movements to improve processing accuracy. In previous mechanical presses, the crank angles of the transport device and the press were completely synchronized. In presses and transport devices using servo motors, the complex changes in the stamping motion and transfer motion make it necessary to prevent mutual interference.

[0005] Therefore, a multi-station press is proposed, in which a reference interference line diagram is prepared using a reference stamping motion and a reference transfer motion to show whether there is an interference relationship between a press and a transfer device, and compared with an operation interference line diagram prepared using an operation stamping motion and an operation transfer motion input before operation, to determine whether there is interference, and adjust the relative relationship of the phase signal so that no interference occurs (Patent Document 1).

[0006] In the multi-station press of Patent Document 1, when comparing the reference interference line diagram and the operation interference line diagram, a line diagram with the transfer feed stroke (distance) as the horizontal axis and the distance after subtracting the transfer lift stroke from the slide stroke as the vertical axis is arranged in the two-dimensional coordinate system; and a line diagram with the transfer clamping stroke (distance) as the horizontal axis and the distance after subtracting the transfer lift stroke from the slide stroke as the vertical axis is arranged. Then, when the operation interference line diagram enters the plane (interference area) enclosed by the reference interference line diagram, it is determined that there is interference.

[0007] Prior art literature

[0008] Patent Literature

[0009] [Patent Document 1] Japanese Patent Publication No. 2013-91078 Summary of the invention

[0010] Technical problem to be solved by the invention

[0011] However, since the interference line diagram is expressed in a two-dimensional coordinate system, sometimes even movements without interference when actually trying to operate the transfer press are judged as interference. In addition, in recent years, there has been a demand for further improvement in the production efficiency of transfer presses.

[0012] Therefore, the present disclosure provides a motion setting method for a multi-station press and a multi-station press that can improve production efficiency.

[0013] Solutions to technical problems

[0014] The present invention aims to solve at least a part of the above-mentioned technical problems, which can be achieved by the following methods or embodiments.

[0015] [1] One aspect of the motion setting method of a multi-station press machine according to the present invention is a motion setting method of a multi-station press machine having a press machine that raises and lowers a slide according to a punching motion and a transport device that moves a holder according to a transfer motion to transport a workpiece, and is characterized by comprising:

[0016] A manufacturing process, based on the temporarily set stamping motion and the temporarily set transfer motion, manufacturing a three-dimensional action curved surface with a relative distance of the retainer relative to a standard upper die mounted on the slider;

[0017] A judging step of comparing the standard upper die interference curved surface obtained by converting the standard upper die interference curve into three dimensions with the action curved surface using the same three-dimensional coordinate system to judge whether the action curved surface is within the interference region of the standard upper die interference curved surface; and

[0018] a changing step of changing a relative phase of the transfer motion with respect to the punching motion when it is determined in the determining step that the action curved surface is located within the interference region;

[0019] After the changing step, the judging step is performed by comparing the standard upper mold interference curved surface with the action curved surface whose relative phase is changed.

[0020] [2] In one embodiment of the motion setting method for the multi-station press machine, the changing step and the judging step may be repeated multiple times within the allowable adjustment range of the relative phase.

[0021] [3] In one form of the motion setting method of the above-mentioned multi-station press, when the relative phase in the changing process exceeds the allowable adjustment range, the relative phase can be returned to the temporarily set state, and after the temporarily set stamping motion is adjusted to slow down near the rising limit of the slider, the judgment process and the changing process are performed.

[0022] [4] In one form of the motion setting method of the multi-station press machine described above, when the relative phase in the change process exceeds the allowable adjustment range, the relative phase can be returned to a temporarily set state, and after the temporarily set transfer motion is adjusted to decelerate on the return action of the retaining member, the judgment process and the change process are performed.

[0023] [5] One embodiment of the multi-station press according to the present invention is a multi-station press having a press machine that raises and lowers a slide according to a punching motion and a transport device that moves a holder according to a transfer motion to transport a workpiece, characterized in that it includes:

[0024] a production section that produces a three-dimensional action curved surface based on the temporarily set punching motion and the temporarily set transfer motion with a relative distance of the holder relative to a standard upper die mounted on the slider;

[0025] a judgment unit that arranges a standard upper mold interference curved surface that three-dimensionalizes the standard upper mold interference curve and the action curved surface in the same three-dimensional coordinate system, and judges whether the action curved surface is within an interference region of the standard upper mold interference curved surface; and

[0026] A phase adjustment unit changes a relative phase of the transfer motion with respect to the punching motion when the action curved surface is located in the interference region.

[0027] [6] In one embodiment of the multi-station press machine, there may be a slider deceleration adjustment unit, which decelerates the temporarily set stamping motion near the rising limit of the slider when the action surface is located in the interference area.

[0028] [7] In one embodiment of the multi-station press machine, there may be a retaining member deceleration adjustment unit, which decelerates the temporarily set transfer movement on the return movement of the retaining member when the action curved surface is located in the interference area.

[0029] Effects of the Invention

[0030] By using the motion setting method and multi-station press of the present disclosure, the specific interference occurrence position can be determined through a three-dimensional coordinate system, and the production efficiency can be improved by changing the relative phase with little impact on the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of a transfer press machine according to one embodiment of the present invention.

[0032] Figure 2 is a diagram illustrating standard punching motion and standard transfer motion.

[0033] Figure 3 It is a standard upper die interference curve configured in a two-dimensional coordinate system.

[0034] Figure 4 It is a standard upper die interference surface configured in a three-dimensional coordinate system.

[0035] Figure 5 This is a flowchart of a motion setting method for a transfer press machine according to one embodiment of the present invention.

[0036] Figure 6 It is a diagram for explaining a temporarily set punching motion and a temporarily set transfer motion.

[0037] Figure 7 It is a temporary action surface.

[0038] Figure 8 This is a diagram for explaining the determination process.

[0039] Fig. 9 This is a diagram illustrating the relative phase change process.

[0040] Fig.10 This is a diagram illustrating the relative phase change process.

[0041] Fig.11 It is a diagram for explaining the speed changing process and the relative phase changing process.

[0042] Fig.12 It is a diagram for explaining the speed changing process and the relative phase changing process. DETAILED DESCRIPTION

[0043] The following describes in detail the preferred embodiments of the present invention using the accompanying drawings. In addition, the embodiments described below are not intended to unduly limit the contents of the present invention described in the claims. Furthermore, the structures described below are not necessarily all essential components of the present invention.

[0044] The multi-station press involved in this embodiment is a multi-station press having a press machine that raises and lowers a slide block according to a punching motion and a transport device that moves a holder according to a transfer motion to transport a workpiece, and is characterized in that it includes: a production section that produces a three-dimensional action curved surface based on the temporarily set punching motion and the transfer motion with a relative distance of the holder relative to a standard upper die installed on the slide block;

[0045] a judgment unit that arranges a standard upper mold interference curved surface that three-dimensionalizes the standard upper mold interference curve and the action curved surface in the same three-dimensional coordinate system, and judges whether the action curved surface is within an interference region of the standard upper mold interference curved surface; and

[0046] A phase adjustment unit changes a relative phase of the transfer motion with respect to the punching motion when the action curved surface is located in the interference region.

[0047] The motion setting method of a multi-station press machine according to the present invention is a motion setting method of a multi-station press machine having a press machine that raises and lowers a slide block according to a punching motion and a transport device that moves a holder according to a transfer motion to transport a workpiece, characterized in that it comprises: a manufacturing step of manufacturing a three-dimensional action curved surface based on the temporarily set punching motion and the transfer motion with the relative distance of the holder relative to a standard upper die installed on the slide block;

[0048] A judging step of comparing the standard upper die interference curved surface obtained by converting the standard upper die interference curve into three dimensions with the action curved surface using the same three-dimensional coordinate system to judge whether the action curved surface is within the interference region of the standard upper die interference curved surface; and

[0049] a changing step of changing a relative phase of the transfer motion with respect to the punching motion when it is determined in the determining step that the action curved surface is located within the interference region;

[0050] After the changing step, the judging step is performed by comparing the standard upper mold interference curved surface with the action curved surface whose relative phase is changed.

[0051] 1.Multi-station press

[0052] use Figure 1 to Figure 4 The transfer press machine 1 will be described in detail. Figure 1 1 is a schematic diagram of a multi-station press machine 1 according to an embodiment of the present invention. Figure 2 is a diagram illustrating the standard punching motion BPM and the standard transfer motion BTM, Figure 3 It is the standard upper die interference curves BDGf and BDGc configured in the two-dimensional coordinate system. Figure 4 It is a standard upper mold interference surface 60 arranged in a three-dimensional coordinate system.

[0053] like Figure 1 As shown, the transfer press 1 comprises: a press 2 for raising and lowering a slide 6 according to a punching motion; a transport device 10 for moving a holder 12 to transport a workpiece 100 according to a transfer motion; and a transfer press control device 30 .

[0054] The press machine 2 has: a slide block 6 that can be raised and lowered by a servo motor 4; an upper die 7 mounted on the lower surface of the slide block 6; a lower die 8 arranged opposite to the upper die 7; a support member (not shown) that fixes the lower die 8; and a servo stamping control device 21. The press machine 2 is driven by the servo motor 4 according to the set stamping movement, and the upper die 7 is raised and lowered relative to the lower die 8 via a power transmission mechanism (not shown) to perform stamping processing on the workpiece 100. The press machine 2 can adopt a well-known servo press used on a multi-station press.

[0055] The servo motor 4 is provided with an encoder 5. In order to control the stamping motion, the detection signal from the encoder 5 is input into the servo stamping control device 21, the servo amplifier 22 and the transfer press control device 30. In addition, although not shown, the press machine 2 may also have an encoder for detecting the height position of the slide 6.

[0056] The transport device 10 includes: a feed rod 11 driven by a plurality of servo motors 14; a holder 12 mounted on the feed rod 11; and a servo transfer control device 25. The feed rod 11 and the holder 12 are arranged in a pair to clamp the lower mold 8. Each feed rod 11 has a plurality of holders 12. The holder 12 is a mechanism for holding the workpiece 100, and has, for example, a hook portion or a vacuum suction cup. The transport device 10 drives the plurality of servo motors 14 according to the set transfer motion and causes the holder 12 to move in a certain direction. Figure 1 It moves by the clamping action CLP, lifting action LFT, forward action ADV, lowering action DWN, releasing action UCL and returning action RTN shown by the middle arrows.

[0057] The clamping action CLP is an action in which the relative holders 12 move closer to each other and the holders 12 hold the workpiece 100 on the lower mold 8. The lifting action LFT is an action in which the holder 12 is raised and the workpiece 100 is demolded from the lower mold 8. The forward action ADV is an action in which the holder 12 is moved along the length direction of the feed rod 11 (along the X-axis direction) and the workpiece 100 is moved onto the next lower mold 8. The descending action DWN is an action in which the holder 12 is lowered and the workpiece 100 is placed on the lower mold 8. The releasing action UCL is an action in which the relative holders 12 move away from each other and the holders 12 release the workpiece 100. The returning action RTN is an action in which the holder 12 is moved along the length direction of the feed rod 11 at a position that does not interfere with the upper mold 7 and returns to the initial position.

[0058] Furthermore, an encoder 15 is provided in the servo motor 14. In order to control according to the transfer motion, the detection signal from the encoder 15 is input to the servo transfer control device 25, the servo amplifier 26 and the transfer press control device 30. Furthermore, the transport device 10 may also include a plurality of encoders (not shown) for detecting the positions of the holder 12 and the feed rod 11.

[0059] The multi-station press machine control device 30 includes, for example, an operation unit 31, a production unit 32, a storage unit 33, a determination unit 34, a phase adjustment unit 35, a slide deceleration adjustment unit 36, a retainer deceleration adjustment unit 37, and an output unit 38. The multi-station press machine control device 30 includes, for example, a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit), a storage medium such as a ROM (Read Only Memory), a RAM (Random Access Memory), or a HDD (Hard Disco Drive), a communication interface for high-speed data communication, and a user interface such as a display, a touch screen, or a keyboard.

[0060] The operating unit 31 is an interface for the operator to input various conditions of the punching motion and the transfer motion. The production unit 32 produces a three-dimensional action surface based on the relative distance of the retaining member 12 relative to the standard upper die installed on the slider 6 based on the punching motion temporarily set according to the input from the operating unit 31 and the temporarily set transfer motion. The storage unit 33 stores the punching motion, the transfer motion, the standard upper die interference surface, the action surface, and various control programs. The judgment unit 34 configures the standard upper die interference surface and the action surface that three-dimensionalize the standard upper die interference curve in the same three-dimensional coordinate system, and judges whether the action surface is within the interference area of ​​the standard upper die interference surface. The phase adjustment unit 35 changes the relative phase of the transfer motion relative to the punching motion when the action surface is within the interference area. The slider deceleration adjustment unit 36 ​​decelerates the temporarily set punching motion near the rising limit of the slider 6 when the action surface is within the interference area. When the action curved surface is located in the interference area, the holder deceleration adjustment unit 37 decelerates the temporarily set transfer motion in the return motion RTN of the holder 12. The output unit 38 displays the standard upper die interference curved surface and the action curved surface configured in the three-dimensional coordinate system on a display not shown, outputs a control signal based on the set stamping motion to the servo stamping control device 21, and outputs a control signal based on the set transfer motion to the servo transfer control device 25. In addition, the processing on each part of the multi-station press control device 30 will be described in detail in the motion setting method.

[0061] Figure 2 (A) shows the standard punching motion BPM and Figure 2 The standard transfer motion BTM shown in (B) is a motion inherently provided on each multi-station press machine 1 and provided as a reference to the customer. If the multi-station press machine 1 follows the standard punching motion BPM and the standard transfer motion BTM, it can operate without interfering with the upper die 7 and the holder 12. The standard punching motion BPM and the standard transfer motion BTM are set corresponding to the same phase angle. Figure 2 In order to make the standard punching movement BPM and the standard transfer movement BTM easier to see, they are divided into (A) and (B) and are diagrammed, but they can also be used as mentioned later. Figure 6 The phase angle is the angle of one cycle from the top dead center TDC to the next top dead center TDC divided into 360 degrees. The phase angle can also be used as the time axis of one cycle starting from the top dead center TDC of the standard punching motion BPM.

[0062] Figure 2 The standard press motion BPM in (A) is, for example, a motion in which the servo motor 4 of the press machine 2 rotates at a constant speed to move the slide 6 up and down. Figure 2 The standard transfer movement BTM in (B) is represented by three curves consisting of the standard feed movement BTMf, the standard clamping movement BTMc and the standard lifting movement BTMl of the transport device 10. In addition, Figure 2 The clamping action CLP, lifting action LFT, forward action ADV, lowering action DWN, release action UCL and return action RTN in Figure 1 The actions indicated by arrows correspond to each other.

[0063] Figure 3 The standard upper die interference curve BDGf shown in (A) is a line graph with the feed stroke of the standard transfer motion BTM (hereinafter referred to as "feed ST") as the horizontal axis and the distance obtained by subtracting the lift stroke of the standard transfer motion BTM (hereinafter referred to as "lift ST") from the slide stroke of the standard punching motion BPM (hereinafter referred to as "slide ST") as the vertical axis. The slide ST may also be the stroke of the standard upper die mounted on the slide 6.

[0064] Figure 3 The standard upper die interference curve BDGc shown in (B) is based on the clamping stroke of the standard transfer motion BTM (hereinafter referred to as "clamping ST") as the horizontal axis and the vertical axis and Figure 3 (A) Line graph with the same settings.

[0065] The standard upper die interference curve BDGf and the standard upper die interference curve BDGc are line graphs showing the relative distance between the holder 12 and the standard upper die installed on the slide 6 that moves at the same phase angle according to the standard punching motion BPM and the standard transfer motion BTM. The so-called standard upper die refers to the upper die 7 of the maximum size designed to be installed on the press machine 2. Figure 3 The standard upper die interference curve BDGf shown in (A) shows that when viewed from the front side of the press machine 2 (opposite to the Y axis), Figure 1 What two-dimensional trajectory does the right retainer 12 follow relative to the slide 6 and the upper die 7? Figure 3 The standard upper die interference curve BDGc shown in (B) shows that when viewed from the opposite direction of the X-axis, Figure 1 The two-dimensional trajectory of the holder 12 on the right side of the press 2 in FIG. 2 is shown relative to the slide 6 and the upper die 7. Here, the standard upper die interference curve BDGc of the right holder 12 is shown. However, if the standard upper die interference curve BDGc is reversed left and right, the standard upper die interference curve BDGc of the left holder 12 is shown. Figure 2 For illustration, when the slider 6 is at the top dead center TDC with a phase angle of 0 degrees, the retainer 12 is located at the farthest position from the slider 6 ( Figure 3 The slider ST-lift ST is the maximum value), when the slider 6 is at the bottom dead center of the phase angle 180 degrees, the retainer 12 is located at the position closest to the standard upper die installed on the slider 6 ( Figure 3 Slider ST-Lift ST is the minimum value).

[0066] Figure 3 The area enclosed by the standard upper die interference curve BDGf in (A) (the range indicated by the oblique lines) is the interference area, and Figure 3 The area on the right side of the standard upper die interference curve BDGc in (B) (the range indicated by the oblique lines) is the interference area. The die designer designs the die so that the die is accommodated in the interference area.

[0067] Figure 4 The standard upper die interference curve BDG shown is Figure 3 The standard upper die interference curve BDGf and the standard upper die interference curve BDGc shown in (A) and (B) are combined and three-dimensionalized, and are arranged in the same three-dimensional coordinate system. Therefore, if the standard upper die interference surface 60 is viewed from the Y-axis direction, it looks like Figure 3 The same as (A), but when viewed from the opposite direction of the X axis, it looks the same as Figure 3The standard upper die interference curve 60 is formed between the standard upper die interference curve BDG and the reference plane 62. The reference plane 62 is a plane parallel to the X-Z plane of the value of the maximum clamping ST of the Y axis. The interference area of ​​the standard upper die interference curve BDGf and the standard upper die interference curve BDGc can be represented by the space formed between the standard upper die interference curve 60 and the reference plane 62. This space is the interference area, and the mold is accommodated in this space.

[0068] 2. Movement setting method of multi-station press

[0069] use Figure 1 , Figures 4 to 12 The motion setting method of the transfer press 1 is described in detail. Figure 5 is a flow chart of a motion setting method of a multi-station press machine 1 according to one embodiment of the present invention. Figure 6 It is a temporary stamping motion PM and a temporary transfer motion TM. Figure 7 is a temporarily set action surface 70, Figure 8 is a diagram for explaining the determination step (S16), Fig. 9 is a diagram for explaining the relative phase changing step (S18), Fig.10 is a diagram for explaining the relative phase changing step (S18), Fig.11 2 is a diagram for explaining the speed changing step (S22) and the relative phase changing step (S18). Fig.12 It is a diagram for explaining the speed changing step (S22) and the relative phase changing step (S18).

[0070] like Figure 5 As shown, the motion setting method of the multi-station press machine 1 at least includes a manufacturing step (S12), a judgment step (S16) and a relative phase change step (S18). Figure 5 As shown, the motion setting method may also include a temporary setting step (S10), a configuration step (S14), a first range determination step (S20), a speed change step (S22), a second range determination step (S24), and a temporary setting error display step (S26). Each step is described in turn below.

[0071] Temporary setting process (S10): Figure 6As shown, the operator who sets the movement of the multi-station press 1 operates the operating unit 31 to temporarily set the stamping movement PM and the transfer movement TM applicable to the product produced by the production unit 32. In the past, since the transfer movement TM is synchronized with the crank angle of the press, when a deceleration action is added to the stamping movement PM, a deceleration action is also added to the transfer, or when the transportation time is extended, the processing time of the press is also extended, etc., it is difficult to temporarily set the two movements independently. However, in this embodiment, there are the judgment process (S16) and the relative phase change process (S18) mentioned later, so the two movements can be set independently.

[0072] Specifically, the punching motion PM is temporarily set in consideration of the SPM (Shots Per Minute) and the number of processes and other formability. For example, if rapid production is important, the punching motion PM is temporarily set to operate at the maximum SPM on the press 2. If the accuracy of the product is important, the punching motion PM including complex acceleration and deceleration actions is temporarily set. At this time, there is no need to consider the impact on the transfer motion TM. Figure 6 In the example of FIG. 1 , a temporary setting is made to add a deceleration action during the descent of the slider 6 so that it reaches the bottom dead center later than the position of the phase angle 180 degrees.

[0073] Furthermore, the transfer motion TM is temporarily set with emphasis on the transport efficiency. For example, the transfer motion TM is temporarily set by using the stroke amount of each axis, the overlap amount, etc., so that the maximum transport efficiency of the transport device 10 is achieved while maintaining the maximum speed and maximum acceleration allowed by the transport device 10. At this time, there is no need to consider the impact on the punching motion PM.

[0074] Production process (S12): Figure 7 As shown, the production unit 32 is based on Figure 6 The temporary stamping motion PM and transfer motion TM are used to create a three-dimensional action curved surface 70 with the relative distance between the retainer 12 and the slider 6. The action curved surface 70 and the use Figure 4Like the standard upper die interference surface 60 described above, it is a surface formed between the action curve DG and the reference surface 62. The action surface 70 is a surface formed by arranging virtual straight lines extending along the X-axis direction with both ends consistent with the action curve DG in a small interval in the Z-axis direction. The action curve DG is a line graph that displays the stamping motion PM and the transfer motion TM in a three-dimensional coordinate system with the feed ST as the X-axis, the clamping ST as the Y-axis, and the distance after subtracting the lifting ST from the slider ST as the Z-axis in a phase angle. Although the movement trajectory of the retainer 12 is displayed as a dotted line below the action curve DG to assist in understanding the action curve DG, it does not have to be displayed. If you look at the action curve DG, you can know the relative distance between the standard upper die installed on the slider 6 and the retainer 12 when the retainer 12 is located at any point on the dotted line. For example, in the advancing motion ADV, it can be seen that the relative distance changes on the periphery of the reference surface 62 , and in the releasing motion UCL, the returning motion RTN, and the clamping motion CLP, it can be seen that the relative distance changes on the periphery of the action curved surface 70 .

[0075] The configuration process (S14) is as follows: Figure 8 As shown, the production unit 32 arranges the standard upper die interference curves BDGf and BDGc in the same three-dimensional coordinate system. Figure 4 Standard upper die interference surface 60 and Figure 7 The configuration step (S14) may also be performed in the next determination step (S16).

[0076] Determination step (S16): The determination unit 34 compares the standard upper mold interference curved surface 60 and the action curved surface 70 configured in the same three-dimensional coordinate system, and determines whether the action curved surface 70 is within the interference area of ​​the standard upper mold interference curved surface 60. The interference area is the area sandwiched by the standard upper mold interference curved surface 60 and the reference surface 62. Figure 8 In the example, a portion of the standard upper mold interference curved surface 60 is closer to the action curved surface 70 in the Y-axis direction (closer to the reader direction), and a portion of the action curved surface 70 that is hidden behind the standard upper mold interference curved surface 60 and cannot be seen is determined to be located in the interference area. Figure 3 When the interference area is displayed in the two-dimensional coordinate system shown in (B), if the motion is set within the interference area, it will be judged as interference. Figure 4 By using the standard upper mold interference curved surface 60 displayed in three dimensions, it is possible to determine whether there is interference along the feed ST, so a more accurate determination can be made. Thus, by using the three-dimensional coordinate system for determination, even a motion that is determined to be interference in the conventional two-dimensional coordinate system can sometimes be determined to be non-interference, thereby achieving higher production efficiency.

[0077] When it is determined in the determination step (S16) that the operating curved surface 70 is located within the interference region ( Figure 5“Yes”), execute the relative phase change process (S18).

[0078] When it is determined in the determination step (S16) that the operating curved surface 70 is not within the interference region ( Figure 5 “No” is answered), the processing of the motion setting method is terminated, and the temporarily set stamping motion PM and the temporarily set transfer motion TM are set as the respective motions of the multi-station press machine 1.

[0079] Relative phase changing step (S18): When the phase adjustment unit 35 determines in the determination step (S16) that the action curved surface 70 is located within the interference region, it changes the relative phase of the transfer motion TM with respect to the punching motion PM. Fig. 9 (A) and Figure 6 The motion line diagram is the same, but after changing the relative phase, such as Fig. 9 As shown in (B), when the phase angle of the punching motion PM is fixed, the transfer motion TM is directly moved to the right side of the figure by a unit phase angle. Fig. 9 In (A), the starting point of the clamping action CLP interferes near the bottom dead center of the slider 6, but Fig. 9 In (B), the starting point of the clamping action CLP leaves the bottom dead center of the slider 6, and interference is avoided without reducing the SPM. The unit phase angle moved by a single relative phase change process (S18) is preset to a specified angle. In the relative phase change process (S18), the movement itself does not change. Therefore, by using the phase adjustment unit 35 of the three-dimensional coordinate system, interference can be avoided without reducing the SPM as much as possible, thereby improving production efficiency. In addition, although the unit phase angle is changed here, the unit phase time can also be changed when the movement is temporarily set with a phase time axis of one period.

[0080] First range judgment step (S20): The phase adjustment unit 35 judges whether the phase angle is within the adjustment allowable range after the relative phase change step (S18). This judgment may also be performed by the judgment unit 34. The adjustment allowable range is pre-set to be the range of the phase angle that can be changed in the relative phase change step (S18), for example, a range not exceeding ±180 degrees. The relative phase change step (S18) and the judgment step (S16) may be respectively within the adjustment allowable range of the relative phase ( Figure 5 By repeating the operation multiple times, the operator can achieve the desired elimination of interference without changing the two movements. In addition, the adjustment permission range can also be set to the number of repetitions of the relative phase change process (S18).

[0081] In this embodiment, after the phase changing step (S18), when it is determined in the first range judging step (S20) that the phase is within the adjustment allowable range, the manufacturing step (S12), the configuration step (S14), the judging step (S16), the relative phase changing step (S18) and the first range judging step (S20) are sequentially performed again. Specifically, the manufacturing step (S12) manufactures the action curved surface 70 with the relative phase changed in the relative phase changing step (S18), the configuration step (S14) configures the standard upper mold interference curved surface 60 and the action curved surface 70 with the relative phase changed in the same three-dimensional coordinate system, and the judging step (S16) compares the two curved surfaces.

[0082] exist Fig.10 , the state of changing the relative phase by repeating the relative phase changing step (S18) twice is shown. Fig.10 , the state of the standard upper mold interference curved surface 60 and the action curved surface 70 configured in the three-dimensional coordinate system viewed along the Y axis is shown. Fig.10 In (A), although the standard upper mold interference curved surface 60 is visible in a wide range near the action curved surface 70 near the clamping action CLP, it is not visible in the case of a change in relative phase. Fig.10 In (B), the visible range of the standard upper mold interference curved surface 60 is narrowed. Fig.10 In (C), although the visible position of the standard upper die interference curved surface 60 moves to the second half of the feed ST (the release action UCL side), the standard upper die interference curved surface 60 is visible and therefore the interference is not eliminated. In addition, Fig.10 and Fig. 9 No correspondence.

[0083] In this way, the relative phase changing step (S18) is repeated. If it is determined in the first range determination step (S20) that the phase is not within the adjustment allowable range ( Figure 5 If S20 is "No", the speed changing step (S22) is executed.

[0084] Speed ​​changing step (S22): When the relative phase of the slider deceleration adjustment unit 36 ​​in the relative phase changing step (S18) exceeds the adjustment allowable range ( Figure 5 If S20 is "No", the relative phase is returned to the temporarily set state, and the temporarily set stamping motion PM is adjusted to decelerate near the rising limit of the slider 6. The rising limit can also be the top dead center TDC of the slider 6. Fig.11 In the example, first, the relative phase is returned to the temporary setting state. Fig. 9 After the state (A) is reached, a deceleration action SD is added near the top dead center TDC of the slider 6 in the punching motion PM. The deceleration action SD in the punching motion PM can make the descending speed and ascending speed of the slider 6 Fig. 9The slider standby time in the vicinity of the top dead center TDC (hereinafter referred to as the slider standby time) can be increased by decelerating in the state (A), and the interference can be easily eliminated. The slider standby time in a deceleration action SD is preset.

[0085] Furthermore, in the speed changing step (S22), when the relative phase of the holder deceleration adjustment unit 37 in the relative phase changing step (S18) exceeds the adjustment allowable range ( Figure 5 S20 is "No"), the relative phase is returned to the temporarily set state, and the temporarily set transfer movement TM is adjusted to decelerate in the return movement RTN of the retainer 12. Fig.11 In the example (A), a deceleration action SD is added near the end of the return action RTN of the transfer movement TM. By adding the deceleration action SD to the return action RTN, the time until the retainer 12 enters the interference area (hereinafter referred to as the "retainer standby time") can be increased, and the interference can be easily eliminated. The retainer standby time in a deceleration action SD is preset.

[0086] Second range judgment step (S24): After the speed change step (S22), the slider deceleration adjustment unit 36 ​​and the retainer deceleration adjustment unit 37 judge whether the slider standby time and the retainer standby time are within the adjustment permission range. This judgment can also be performed by the judgment unit 34. The adjustment permission range is pre-set to the range of each standby time that can be changed in the speed change step (S22). When each standby time in the second range judgment step (S24) is within the adjustment permission range ( Figure 5 If S24 is "Yes", the manufacturing process (S12), the configuration process (S14) and the judgment process (S16) are executed again, so that when it is judged that there is interference ( Figure 5 If S16 is "Yes", the relative phase change step (S18) is performed. Fig.11 In (A), after the slider standby time and the holder standby time are set in the speed change step (S22), Fig.11 The relative phase changing step (S18) is performed in (B). As a result, the starting point of the clamping action CLP is away from the bottom dead center, so the interference is eliminated. By performing the relative phase changing step (S18) after the speed changing step (S22) in this way, the reduction in production efficiency caused by deceleration can be suppressed while avoiding interference.

[0087] Furthermore, when each standby time in the second range determination step (S24) is not within the adjustment allowable range ( Figure 5If S24 is "No", a temporary error display step (S26) is executed. The temporary error display step (S26) uses the output unit 38 to display an error, prompting the operator to change the temporarily set pressing motion PM and transfer motion TM.

[0088] exist Fig.12 In the example, the state of the temporary setting is returned from the execution of the speed change process (S22) to set each standby time, and the first relative phase change process (S18) is further executed to the state (A). Fig.12 In (A), since the action curved surface 70 still exists in the interference region, the second relative phase change step (S18) is further performed to present a state where the standard upper mold interference curved surface 60 is not in front of the action curved surface 70 as in (B). Fig.12 In the figure, although the operation curved surface 70 is viewed from the front in the Y-axis direction for the sake of convenience, it is not clear that the operation curved surface 70 is not in the interference area, Figure 8 As shown in the three-dimensional display, it can be seen that the action curved surface 70 is not between the standard upper mold interference curved surface 60 and the reference surface 62. Fig.12 When the state (B) is reached, the judgment step (S16) judges that there is no interference ( Figure 5 S16 of the control module is "Yes"), the setting of the movement is terminated.

[0089] The speed changing step (S22) and the second range determination step (S24) can be repeated multiple times within the adjustment allowable range of each standby time. In this way, by performing the relative phase changing step (S18) each time the deceleration amount is reduced and the speed changing step (S22) is repeated, the SPM can be suppressed from decreasing and interference can be avoided, thereby achieving improved production efficiency.

[0090] In the above-mentioned embodiment, the operation of the press machine 1 in which the crankshaft rotates once and the press motion PM is described, but the present invention is not limited to this, and the press machine 1 may also perform a pendulum motion or a continuous strike motion.

[0091] The present invention is not limited to the above-mentioned embodiments, and various modifications may be further made, including structures that are substantially the same as the structures described in the embodiments (structures with the same functions, methods and results or structures with the same purposes and effects). Furthermore, the present invention includes structures that replace non-essential parts of the structures described in the embodiments. Furthermore, the present invention includes structures that have the same effects as the structures described in the embodiments or structures that can achieve the same purposes. Furthermore, the present invention includes structures that add common knowledge to the structures described in the embodiments.

[0092] Description of Reference Numerals

[0093] 1. Multi-station press, 2. Press, 4. Servo motor, 5. Encoder, 6. Slider, 7. Upper die, 8. Lower die, 10. Transport device, 11. Feed rod, 12. Holder, 14. Servo motor, 15. Encoder, 21. Servo stamping control device, 22. Servo amplifier, 25. Servo transfer control device, 26. Servo amplifier, 30. Multi-station press control device, 31. Operation unit, 32. Production unit, 33. Storage unit, 34. Judgment unit, 35. Phase adjustment unit, 36. Slider deceleration adjustment unit, 37. Holder deceleration adjustment unit, 38. Output unit, 60. Standard upper die interference surface, 62. Base Standard surface, 70. Action surface, 100. Workpiece, ADV. Forward motion, BPM. Standard stamping motion, BTM. Standard transfer motion, BTMf. Standard feeding motion, BTMc. Standard clamping motion, BTMl. Standard lifting motion, BDG, BDGf, BDGc. Standard upper die interference curve, CLP. Clamping motion, DG. Action curve, DWN. Lowering motion, LFT. Lifting motion, PM. Stamping motion, RTN. Return motion, SD. Deceleration motion, TDC. Top dead center, TM. Transfer motion, TMf. Feeding motion, TMc. Clamping motion, TMl. Lifting motion, UCL. Release motion.

Claims

1. A method for setting the movement of a multi-station press, which is a press having a slide that is raised and lowered according to a punching movement and a transport device that moves a holder to transport a workpiece according to a transfer movement, characterized in that: include: A manufacturing process, based on the temporarily set stamping motion and the temporarily set transfer motion, manufacturing a three-dimensional action curved surface with a relative distance of the retainer relative to a standard upper die mounted on the slider; A judging step of comparing a standard upper die interference curved surface configured in the same three-dimensional coordinate system and the action curved surface, and judging whether the action curved surface is located in an interference area of ​​the standard upper die interference curved surface; as well as a changing step, when it is determined in the determining step that the action curved surface is located within the interference region, changing the relative phase of the transfer motion with respect to the punching motion, After the changing step, the judging step is performed by comparing the standard upper mold interference curved surface with the action curved surface whose relative phase is changed.

2. The motion setting method of a multi-station press according to claim 1, characterized in that: The changing step and the determining step are respectively repeated a plurality of times within the adjustment allowable range of the relative phase.

3. The motion setting method of a multi-station press according to claim 2, characterized in that: When the relative phase in the changing process exceeds the allowable adjustment range, the relative phase is returned to the temporarily set state, and after the temporarily set stamping motion is adjusted to slow down near the rising limit of the slider, the judging process and the changing process are performed.

4. The motion setting method of a multi-station press according to claim 2 or 3, characterized in that: When the relative phase in the changing process exceeds the allowable adjustment range, the relative phase is returned to the temporarily set state, and after the temporarily set transfer motion is adjusted to decelerate the return action of the retaining member, the judging process and the changing process are performed.

5. A multi-station press having a press for raising and lowering a slide according to a punching motion and a transport device for moving a holder to transport a workpiece according to a transfer motion, characterized in that: include: a production section that produces a three-dimensional action curved surface based on the temporarily set punching motion and the temporarily set transfer motion with a relative distance of the holder relative to a standard upper die mounted on the slider; A judging unit configured to configure a standard upper die interference curved surface that three-dimensionalizes the standard upper die interference curve and the action curved surface in the same three-dimensional coordinate system, and to judge whether the action curved surface is located within an interference region of the standard upper die interference curved surface; as well as A phase adjustment unit changes a relative phase of the transfer motion with respect to the punching motion when the action curved surface is located in the interference region.

6. The multi-station press according to claim 5, characterized in that: A slider deceleration adjustment unit is further provided, and when the action curved surface is located in the interference region, the slider deceleration adjustment unit decelerates the temporarily set pressing motion near the rising limit of the slider.

7. The multi-station press according to claim 5 or 6, characterized in that: A holder deceleration adjustment unit is further provided, and when the action curved surface is located in the interference area, the holder deceleration adjustment unit decelerates the temporarily set transfer motion on the return motion of the holder.

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