Progressive press device, and control method

Abstract

To provide a progressive press device, and a control method which can precisely adjust positioning error of punching.SOLUTION: A progressive press device 10 comprises: a transportation part 11 which transfers a strip-like steel plate; a plurality of press machines P1, P2, P3 which are arrayed in a transportation direction of the strip-like steel plate 40; a printing part which prints borderlines 33 indicating punching portions of the plurality of press machines on the strip-like steel plate 40; and a recognition part which recognizes a shape of the borderline 33 after punching the strip-like steel plate. The progressive press device 10 is provided in which the plurality of press machines P1, P2, P3 sequentially punch based on the borderlines 33 the strip-like steel plate 40 where the borderlines 33 are printed by the printing part while the transportation part 11 transfers the strip-like steel plate. The progressive press device 10 controls at least one of a feed ratio in the transportation direction in the transportation part 11 and a moving amount in a width direction based on a shape of the borderline 33 after punching the strip-like steel plate 40.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a progressive press device and a control method. [Background technology]

[0002] Motor cores such as rotor cores and stator cores are formed by stacking electromagnetic steel sheets. The electromagnetic steel sheets are punched, for example, by a press. To prevent electromagnetic steel sheets with misaligned punching holes from being stacked, technology is being developed to eliminate the misalignment of punching positions.

[0003] For example, Patent Document 1 discloses a progressive press device that eliminates deviations in punching positions. The progressive press device disclosed in Patent Document 1 is provided with load sensors on four sides of a pilot pin that serves as a reference for punching. The progressive press device disclosed in Patent Document 1 eliminates deviations in punching positions based on the load results in four directions (up, down, left, and right) relative to the feed direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-047689 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the progressive press device disclosed in the above-mentioned Patent Document 1, it is difficult to accurately adjust the deviation of the punching position when the position is obliquely deviated from the feed direction.

[0006] The present disclosure has been made in consideration of the above circumstances, and provides a progressive press device and a control method that can precisely adjust the deviation of the punching position. [Means for solving the problem]

[0007] The progressive press device according to the present disclosure is A conveying unit that conveys the strip steel plate; A plurality of press machines arranged in a conveying direction of the strip steel plate; A printing unit that prints contour lines indicating punching locations of the plurality of presses on the strip steel plate; a recognition unit for recognizing a shape of the contour line after punching of the strip steel plate; Equipped with A progressive press apparatus which sequentially punches the strip steel plate, on which the contour line is printed by the printing unit, using the multiple presses based on the contour line while conveying the strip steel plate by the conveying unit, At least one of a feed amount in a conveying direction and a movement amount in a width direction of the conveying section is controlled based on the shape of the contour line recognized by the recognition section.

[0008] The progressive press device according to the present disclosure can determine whether the punching position is misaligned from the shape of the contour line, and therefore can accurately adjust the misalignment of the punching position by controlling at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section.

[0009] The recognition unit recognizes a shape of the contour line from an image, When the contour line of the steel strip is missing in the image due to punching, at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section may be controlled. With this configuration, the progressive press machine can determine that the punching position is misaligned due to a missing contour line, and can accurately adjust the misalignment of the punching position by controlling at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section.

[0010] Furthermore, at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section may be controlled based on the amount and direction of deviation between the contour line of the strip steel plate and the edge of the hole formed by punching. With this configuration, the progressive press machine can determine that the punching position is misaligned by detecting a misalignment between the contour line and the edge of the punched hole. Then, based on the amount and direction of misalignment between the contour line and the edge of the punched hole, at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section is controlled. Therefore, the misalignment of the punching position can be accurately adjusted.

[0011] The progressive press device according to the present disclosure is A progressive press device which sequentially punches a strip-shaped electromagnetic steel sheet while conveying the strip-shaped electromagnetic steel sheet, using a plurality of presses arranged in a conveying direction of the strip-shaped electromagnetic steel sheet, a coil provided at a predetermined distance from a side surface of the strip-shaped electromagnetic steel sheet; At least one of the feed amount in the conveying direction and the movement amount in the width direction of the strip of electromagnetic steel sheet is controlled based on the value of the induced current in a coil generated by conveying the strip of electromagnetic steel sheet.

[0012] The progressive press device according to the present disclosure can determine whether the punching position is misaligned from the value of the induced current, and therefore can precisely adjust the misalignment of the punching position by controlling at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section.

[0013] The control method according to the present disclosure includes: A method for controlling a progressive press device, which conveys a strip-shaped steel plate on which contour lines indicating punching positions of a plurality of presses are printed, and sequentially punches the strip-shaped steel plate using the plurality of presses based on the contour lines, comprising the steps of: Recognizing the shape of the contour line after punching of the strip steel plate; controlling at least one of a feed amount in a conveying direction and a movement amount in a width direction of the conveying unit based on the recognized shape of the contour line; The processing is carried out by a computer.

[0014] In the control method according to the present disclosure, it is possible to determine whether the punching position is misaligned from the shape of the contour line, and therefore, by controlling at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section, it is possible to accurately adjust the misalignment of the punching position. Effect of the Invention

[0015] The present disclosure provides a progressive press device and a control method that can precisely adjust the deviation of the punching position. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a block diagram of a progressive press device according to a first embodiment. [Diagram 2] FIG. 1 is a plan view of a progressive press device according to a first embodiment. [Diagram 3] 4 is a flowchart showing the flow of operations of the progressive press device according to the first embodiment. [Figure 4] 3 is a diagram showing a part of a strip steel plate after punching using the progressive press device according to the first embodiment. FIG. [Diagram 5] FIG. 11 is a block diagram of a progressive press device according to a second embodiment. [Figure 6] FIG. 11 is a plan view of a progressive press device according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, the present disclosure will be described through the embodiments of the invention, but the invention according to the claims is not limited to the following embodiments. In addition, not all of the configurations described in the embodiments are necessarily essential as means for solving the problems. For clarity of explanation, the following description and drawings have been omitted and simplified as appropriate. In each drawing, the same elements are given the same reference numerals, and duplicated explanations are omitted as necessary. It should be noted that the right-handed xyz orthogonal coordinate system shown in the drawings is, of course, for the convenience of explaining the positional relationship of the components. Usually, the positive direction of the z axis is vertically upward, and the xy plane is a horizontal plane.

[0018] (Embodiment 1) <Progressive press device configuration> First, the configuration of the progressive press device will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a block diagram of the progressive press device according to embodiment 1. Fig. 2 is a plan view (xy plan view) of the progressive press device according to embodiment 1.

[0019] As shown in Fig. 1, the progressive press apparatus 10 according to the first embodiment includes a transport unit 11, a press unit 12, a printing unit 13, a control unit 14, and a recognition unit 15. Note that the printing unit 13, the control unit 14, and the recognition unit 15 are omitted in Fig. 2.

[0020] First, the strip steel plate 40 and the conveying section 11 will be described. A motor core such as a rotor core or a stator core is formed by stacking steel plates 50 shown in Fig. 2. The steel plates 50 are formed by punching the strip steel plate 40 using a progressive press device 10. Fig. 2 shows the case where the steel plate 50 for a rotor core is formed. As shown in Fig. 2, the strip steel plate 40 is placed on the progressive press device 10. The strip steel plate 40 is usually prepared in a coil-shaped wound state (not shown).

[0021] As shown in Fig. 2, the conveying section 11 is composed of a feeder 21 and a guide roller 31. The feeder 21 is composed of a pair of rollers sandwiching the strip steel plate 40 from above and below, one of which is a drive roller and the other a driven roller. In the example shown in Fig. 2, the feeder 21 moves the strip steel plate 40 in the positive direction of the x-axis. That is, the positive direction of the x-axis is the conveying direction of the strip steel plate 40. The negative direction of the x-axis is referred to as the upstream side of the progressive press device 10, and the positive direction of the x-axis is referred to as the downstream side of the progressive press device 10.

[0022] As shown in Fig. 2, the feeder 21 transports the strip steel sheet 40 from the upstream side to the downstream side. In the example shown in Fig. 2, the feeders 21 are provided on both the upstream side and the downstream side of the progressive press device 10, and either one or both of them constitute a feeding means.

[0023] As shown in Fig. 2, the guide rollers 31 are cylindrical driven rollers arranged so as to contact both side ends of the strip steel sheet 40 and have their central axes aligned in the z-axis direction. The guide rollers 31 are provided at predetermined intervals in the conveying direction of the strip steel sheet 40, and in the example shown in Fig. 2, four guide rollers 31 are provided on one side, for a total of eight guide rollers 31 on both sides.

[0024] The feed amount in the conveying direction between the feeder 21 and the guide roller 31 is adjustable. Also, by adjusting the widthwise position of the guide roller 31 with respect to the steel strip 40, the widthwise movement amount of the steel strip 40 in the conveying section 11 can be adjusted. Furthermore, by providing a feed angle with respect to the feeder 21, the widthwise movement amount of the steel strip 40 can be adjusted. As described later, when the steel strip 40 is conveyed in a meandering manner, the meandering can be adjusted by controlling at least one of the feed amount and the widthwise movement amount of the steel strip 40 in the conveying section 11.

[0025] The press section 12 is composed of a plurality of press machines P1, P2, P3 arranged in the conveying direction of the strip steel plate. The plurality of press machines P1, P2, P3 shown in Fig. 2 are simply shown, and the arrangement, size, shape, etc. are not limited to those shown in Fig. 2. In the press machines P1, P2, P3, a punch (not shown) moves up and down along a central axis centered on each of the holes 41, 42, 43, which are the punching locations of the strip steel plate 40. When the punch comes into contact with the strip steel plate 40 by moving from the positive direction of the z-axis toward the negative direction of the z-axis, the holes 41, 42, 43 are punched out of the strip steel plate 40.

[0026] The press machine P1 punches the steel strip 40 to form a hole 41. The press machine P2 punches the steel strip 40 to form a hole 42. The press machine P3 punches the steel strip 40 to form a hole 43. The steel strip 40 is punched in order by the multiple press machines P1, P2, and P3 while being transported in the transport direction.

[0027] Steel plate 50 for the rotor core is formed by punching with press unit 12. Hole 41 in steel plate 50 is a hole into which the rotating shaft of the rotor is inserted, and hole 42 is a hole into which a magnet is inserted. As shown in Fig. 2, hole 43 forms the outer periphery of steel plate 50 for the rotor core.

[0028] The printing unit 13 prints contour lines indicating the punching locations of the multiple presses P1, P2, and P3 on the strip steel plate 40. In the example shown in Fig. 2, the printing unit 13 (not shown) prints a contour line 33 on the strip steel plate 40. In the example shown in Fig. 2, the contour line 33 is shown by a dotted line, and the edges of the holes punched by the punching process are shown by a solid line. Note that although the contour line 33 is shown by a dotted line, it is not limited to this and may be a solid line.

[0029] It is preferable that the width of the contour line 33 is equal to the dimensional tolerance. For example, if the dimensional tolerance is XX ±25 micrometers, the printing unit 13 prints a contour line with a width of 50 micrometers based on XX. However, the width of the contour line 33 is not limited to a width based on the dimensional tolerance. The contour line 33 may also be colored. Furthermore, the printing unit 13 may print the contour line 33 so as to fill in the inside of the strip steel plate 40 surrounded by the contour line 33, i.e., the punched out portion.

[0030] The printing unit 13 is a stamp having a convex shape on a metal mold. However, the printing unit 13 is not limited to this, and may be, for example, an inkjet printer or a laser. The printing unit 13 may also use thermal transfer printing performed in a high temperature range.

[0031] The contour line 33 is removed from the steel sheet 50. If the strip steel sheet 40 is an electromagnetic steel sheet described later in the second embodiment, it is preferable to use a cooling oil such as automatic transmission fluid since it is prone to rusting due to water. Note that even if the contour line 33 remains on the steel sheet 50, it does not affect the quality of the motor.

[0032] 2 shows an example in which a rotor core shape is printed, but this is not limiting and a stator core shape may also be used. The printing unit 13 can also print multiple contour lines 33 at the same time. When a rotor and a stator are produced together, the contour lines of the rotor and the stator can also be printed at the same time.

[0033] The control unit 14 (not shown in FIG. 2) controls at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit 11. The control unit 14 also controls the up and down movement of the punch in the press unit 12 and the printing in the printing unit 13. The control unit 14 also controls the recognition process of the contour line 33 in the recognition unit 15, which will be described later. The control unit 14 includes a calculation unit, for example, a CPU (Central Processing Unit), and a storage unit, such as a RAM (Random Access Memory) or a ROM (Read Only Memory), in which various control programs, data, etc. are stored. In other words, the control unit 14 has the function of a computer, and performs various processes based on the various control programs, etc.

[0034] The control of the conveying section by the control section 14 is for the purpose of adjusting the meandering of the strip steel sheet 40. When meandering occurs, errors are accumulated downstream of the progressive press device 10, and the dimensional accuracy is significantly deteriorated. As a result, the air gap increases, which affects the quality of the motor. In order to adjust the meandering of the strip steel sheet 40 to eliminate it, it is preferable to control the feed amount of the guide roller 31 in the conveying direction and the position in the width direction relative to the strip steel sheet 40. Note that the feed amount and feed angle of the feeder 21 in the conveying direction may be controlled to adjust the meandering of the strip steel sheet 40 to eliminate it.

[0035] The recognition unit 15 recognizes the shape of the contour line after the punching process of the strip steel plate. The recognition unit 15 acquires an image of the strip steel plate after the punching process, which is taken by, for example, a camera. In this case, the progressive press device 10 may be equipped with a camera. However, this is not limited to this, and the progressive press device 10 may not be equipped with a camera, but may be a camera capable of transmitting and receiving with the progressive press device 10. As another example, the recognition unit 15 is a laser scanner. In this case, the progressive press device 10 may be equipped with a laser scanner. However, this is not limited to this, and the progressive press device 10 may not be equipped with a laser scanner, but may be a laser scanner capable of transmitting and receiving with the progressive press device 10. 2, an idle time is provided between the press P2 and the press P3. During this idle time, it is preferable for the recognition unit 15 to recognize the contour line 33. Of course, the recognition unit 15 may recognize the contour line 33 after each press.

[0036] <Progressive press operation> Next, the operation of the progressive press device will be described with reference to Figures 2 and 3. Figure 3 is a flow chart showing the flow of the operation of the progressive press device. First, the progressive press device 10 conveys the strip steel plate 40 (step ST1). More specifically, the strip steel plate 40 is passed through and the feeder 21 presses the strip steel plate 40. As a result, as shown in FIG. 2, the strip steel plate 40 starts to move in the conveying direction by the feeder 21.

[0037] Next, the progressive press device 10 prints contour lines indicating the punching locations of the multiple presses on the strip steel plate 40 (step ST2). More specifically, as shown in FIG. 2, the printing unit 13 (not shown) prints contour lines 33 on the strip steel plate 40.

[0038] Next, the progressive press device 10 performs a punching process on the strip steel plate 40 (step ST3). More specifically, as shown in Fig. 2, the press unit 12 performs a punching process on the strip steel plate 40 to form holes 41, 42, and 43. In this way, the steel plate 50 for the rotor core shown in Fig. 2 is formed.

[0039] Next, the progressive press device 10 recognizes the shape of the contour line after the punching process of the strip steel plate (step ST4). More specifically, the recognition unit 15 acquires an image of the strip steel plate after the punching process taken by a camera. Then, the recognition unit 15 recognizes the shape of the contour line of the strip steel plate after the punching process from the acquired image.

[0040] Next, the progressive press device 10 judges whether or not the contour line printed on the strip steel plate 40 is missing (step ST5). More specifically, the control unit 14 judges whether or not the contour line printed on the strip steel plate 40 by the printing unit 13 is missing in the image in which the recognition unit 15 recognizes the shape of the contour line. Details of whether or not the contour line printed on the strip steel plate 40 is missing will be described later.

[0041] If the contour line printed by the printing unit 13 on the strip steel plate 40 is missing (step ST5 YES), the progressive press device 10 controls at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit. More specifically, the control unit 14 controls so as to adjust at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit (step ST6). A method for controlling at least one of the feed amount in the conveying direction and the movement amount in the width direction will be described later. On the other hand, if the contour line printed by the printing unit 13 on the strip steel plate 40 is not missing (step ST5 NO), the progressive press device 10 operates to form a new steel plate 50 from the strip steel plate 40.

[0042] As explained with reference to Figures 2 and 3, the progressive press device 10 transports a strip steel plate 40, on which a contour line 33 has been printed by a printing unit 13, by a transport unit 11, and sequentially punches out the strip steel plate 40 based on the contour line 33 using multiple presses P1, P2, and P3.

[0043] 3, an example has been described in which the control unit 14 determines whether or not the contour line printed on the strip steel sheet 40 is missing, and controls at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit. However, this is not limited to this, and for example, the control unit 14 may control at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit when the shape of the contour line differs from that stored in advance.

[0044] That is, the progressive press device 10 can determine that the punching position is misaligned based on the shape of the outline of the steel strip 40 after punching. Therefore, the progressive press device 10 controls at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section 11. This allows the progressive press device 10 to accurately adjust the misalignment of the punching position.

[0045] 3 shows an example in which, after the press machine P3 punches out hole 43 (step ST3), the contour shape after punching is recognized and determined (steps ST4, 5) and the conveying unit 11 is controlled (step ST6). However, this is not limited to the example, and after the press machine P1 punches out hole 41, the contour shape after punching may be recognized and determined and the conveying unit 11 may be controlled. Furthermore, after the press machine P1 punches out hole 42, the contour shape after punching may be recognized and determined and the conveying unit 11 may be controlled.

[0046] <Progressive press device control> Next, a method for controlling the conveying unit of the progressive press machine will be described. Here, with reference to FIG. 4, a detailed explanation will be given of whether the printed contour line is missing or not, and a method for controlling the feed amount in the conveying direction and the movement amount in the width direction will be described.

[0047] Fig. 4 is a diagram showing a part of a strip steel sheet after punching using the progressive press device according to embodiment 1. The upper and middle parts of Fig. 4 show the strip steel sheet immediately after a hole 43 is formed by the press machine P3 shown in Fig. 2. The lower part of Fig. 4 shows the strip steel sheet immediately after a hole 42 is formed by the press machine P2 shown in Fig. 2. In Fig. 4, as in Fig. 2, the dotted line indicates the outline of the portion punched by the press unit, and the solid line indicates the edge of the hole punched by the punching process.

[0048] In the upper part of Fig. 4, the printed contour line 33 on the steel strip 40 is not missing. More specifically, even when the steel strip 40 is punched by the presses P1, P2, and P3, the printed contour line 33 remains in its entirety. In other words, it can be determined that the punching process is within the dimensional tolerance. Therefore, in the upper part of FIG. 4, since no deviation occurs in the punching position, the control unit performs control so as to maintain the feed amount in the conveying direction and the movement amount in the width direction of the conveying unit.

[0049] In the middle of Fig. 4, the printed contour line 33 on the strip steel plate 40 is missing. More specifically, even when the strip steel plate 40 is punched by the press machine P1, the printed contour line 33 corresponding to the hole 41 remains. However, when the strip steel plate 40 is punched by the press machine P2, the printed contour line 33 corresponding to the hole 42 is missing. Moreover, when the strip steel plate 40 is punched by the press machine P3, the printed contour line 33 corresponding to the hole 43 is missing.

[0050] That is, in the middle part of Figure 4, no contour line 33 remains on the downstream side of the conveying direction of the strip steel plate 40, but the contour line 33 remains on the upstream side of the conveying direction, resulting in a shift in the punching position on the downstream side of the conveying direction. 4, the punching position is shifted downstream in the conveying direction, so the control unit controls at least one of the feed amount in the conveying direction and the movement amount in the width direction of the conveying unit. More specifically, the control unit determines that the conveying pitch is insufficient and increases the feed amount of the conveying unit.

[0051] The control unit may also control at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit based on the amount and direction of deviation between the contour line of the strip steel sheet and the edge of the hole formed by punching. The amount and direction of deviation between the contour line of the strip steel sheet and the edge of the hole formed by punching is calculated by image processing using, for example, calibration or alignment.

[0052] 4, the control unit controls at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit based on the amount of misalignment and the direction of misalignment between the edge of hole 43 and the contour line 33 that corresponds to hole 43 among contour lines 33. However, this is not limited to this, and the control unit may control at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit based on the amount of misalignment and the direction of misalignment between the edge of hole 42 and the contour line 33 that corresponds to hole 42 among contour lines 33.

[0053] In the lower part of Fig. 4, the printed contour line 33 on the strip steel plate 40 is missing. More specifically, even when the strip steel plate 40 is punched by the press machine P1, the contour line 33 corresponding to the hole 41 among the printed contour lines 33 remains. However, when the strip steel plate 40 is punched by the press machine P2, the contour line 33 corresponding to the hole 42 among the printed contour lines 33 is missing. 4, since the punching position is shifted, the control unit controls at least one of the feed amount in the conveying direction and the movement amount in the width direction of the conveying unit. More specifically, the control unit controls at least one of the feed amount in the conveying direction and the movement amount in the width direction of the conveying unit based on the amount and direction of shift between the edge of hole 42 and the part of contour line 33 that corresponds to hole 42.

[0054] In this way, in the progressive press machine according to the first embodiment, it is possible to determine that the punching position is misaligned by the lack of a contour line. Therefore, by controlling at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section, the misalignment of the punching position can be accurately adjusted. This allows the formation of rotors and stators with excellent dimensional accuracy, reducing the air gap and improving the torque.

[0055] Furthermore, since at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section can be controlled from the amount and direction of deviation between the contour line and the edge of the punched hole, the deviation of the punching position can be accurately adjusted regardless of the direction in which the punching position is deviated.

[0056] (Embodiment 2) <Progressive press machine using coils> First, the configuration of the progressive press apparatus according to the second embodiment will be described with reference to Figs. 5 and 6. Fig. 5 is a block diagram of the progressive press apparatus according to the second embodiment. Fig. 6 is a plan view (xy plan view) of the progressive press apparatus according to the second embodiment. As shown in Fig. 5, the progressive press apparatus 20 according to the second embodiment includes a conveying section 11, a pressing section 12, a control section 14, and a coil 23. The conveying section 11, the pressing section 12, and the control section 14 in the progressive press apparatus 20 according to the second embodiment are similar to those of the progressive press apparatus according to the first embodiment, and therefore their description will be omitted. Here, the coil 23 will be described. Note that Fig. 6 is a diagram in which the control section 14 and the coil 23 are omitted.

[0057] As shown in Fig. 6, the coil 23 is provided at a predetermined distance from the side surface of the strip-shaped electromagnetic steel sheet 60. In the example shown in Fig. 6, the coil 23 is provided on both ends of the side surface of the strip-shaped electromagnetic steel sheet 60, but this is not limited thereto, and the coil 23 may be provided on one side of the side surface of the strip-shaped electromagnetic steel sheet 60.

[0058] When the strip-shaped electromagnetic steel sheet 60 is transported in the transport direction, an induced current is generated in the coil 23. The progressive press device 10 controls at least one of the feed amount in the transport direction and the movement amount in the width direction of the strip-shaped electromagnetic steel sheet, based on the value of the induced current in the coil 23.

[0059] More specifically, when the coil 23 detects an induced current, the control unit 14 determines whether or not the induced current falls within a given current value range. If the induced current does not fall within the given current value range, the control unit 14 controls at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit so that the induced current falls within the given current value range. On the other hand, if the induced current falls within the given current value range, the control unit 14 controls the feed amount in the conveying direction and the movement amount in the width direction in the conveying unit so that they are maintained.

[0060] 5 and 6 have described an example in which at least one of the feed amount in the conveying direction and the movement amount in the width direction during conveying is controlled based on the value of the induced current in coil 23. As another example of controlling the movement amount in the width direction in the conveying section, a method of controlling based on the distance from the side surface of strip-shaped electromagnetic steel sheet 60 to coil 23 may be used.

[0061] In this case, the coil 23 is equipped with a distance sensor. This allows the distance sensor to detect the distance from the side surface of the strip-shaped electromagnetic steel sheet 60 to the coil 23. Then, the control unit 14 judges whether or not the distance detected by the distance sensor is an arbitrary distance. If the distance detected by the distance sensor is not an arbitrary distance, the control unit 14 controls the amount of movement in the width direction of the conveying unit so that the distance detected by the distance sensor becomes the arbitrary distance. On the other hand, if the distance detected by the distance sensor is an arbitrary distance, the control unit 14 controls so as to maintain the amount of movement in the width direction in the conveying direction of the strip-shaped electromagnetic steel sheet.

[0062] Here, a case has been described in which a distance sensor detects the distance from the side surface of the strip-shaped electromagnetic steel sheet 60 to the coil 23, but the present invention is not limited to this and any sensor that can detect the distance from the side surface of the strip-shaped electromagnetic steel sheet 60 to the coil 23 may be used. The sensor is, for example, a proximity sensor, a CMOS (Complementary Metal Oxide Semiconductor) type laser sensor, a TOF (Time of Flight) type laser sensor, or an ultrasonic sensor.

[0063] In this way, the progressive press device according to the second embodiment can determine whether the punching position is shifted from the value of the induced current. Therefore, by controlling at least one of the feed amount in the conveying direction and the movement amount in the width direction in the conveying section, the shift in the punching position can be accurately adjusted.

[0064] In addition, a part or all of the processing in the control unit according to the above-mentioned first and second embodiments can be realized as a computer program. Such a program can be stored using various types of non-transitory computer-readable media and supplied to a computer. The non-transitory computer-readable media includes various types of tangible control media. Examples of the non-transitory computer-readable media include magnetic control media (e.g., flexible disks, magnetic tapes, hard disk drives), magneto-optical control media (e.g., magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / Ws, and semiconductor memories (e.g., mask ROMs, PROMs (Programmable ROMs), EPROMs (Erasable PROMs), flash ROMs, and RAMs (Random Access Memory)). The program may also be supplied to a computer by various types of temporary computer-readable media. Examples of the temporary computer-readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable media can supply the program to a computer via wired communication paths such as electric wires and optical fibers, or wireless communication paths.

[0065] The present disclosure is not limited to the above-described embodiment, and may be modified as appropriate without departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0066] 10, 20 Progressive press device 11 Conveyor section 12 Press Department 13 Printing Department 14 Control section 15 Recognition part 21 Feeder 23 Coil 31 Guide roller 33 Contour 40 Steel strip Holes 41, 42, 43 50 steel plate 60 Strip-shaped electromagnetic steel sheet P1, P2, P3 press machines

Claims

1. A conveying unit that conveys the strip steel plate; A plurality of press machines arranged in a conveying direction of the strip steel plate; A printing unit that prints contour lines indicating punching locations of the plurality of presses on the strip steel plate; a recognition unit for recognizing a shape of the contour line after punching of the strip steel plate; Equipped with A progressive press apparatus which sequentially punches the strip steel plate, on which the contour line is printed by the printing unit, using the multiple presses based on the contour line while conveying the strip steel plate by the conveying unit, at least one of a feed amount in a conveying direction and a movement amount in a width direction of the conveying unit is controlled based on the shape of the contour line recognized by the recognition unit. Progressive press device.

2. The recognition unit recognizes a shape of the contour line from an image, When the contour line of the strip steel plate is missing due to punching in the image, at least one of the feed amount in the conveying direction and the movement amount in the width direction of the conveying unit is controlled. The progressive press device according to claim 1.

3. at least one of a feed amount in a conveying direction and a movement amount in a width direction in the conveying section is controlled based on a deviation amount and a deviation direction between a contour line of the strip steel plate and an edge of a hole formed by punching. The progressive press device according to claim 1 or 2.

4. A progressive press device that sequentially punches out a strip-shaped electromagnetic steel sheet while conveying the strip-shaped electromagnetic steel sheet using a plurality of presses arranged in a conveying direction of the strip-shaped electromagnetic steel sheet, a coil provided at a predetermined distance from a side surface of the strip-shaped electromagnetic steel sheet; controlling at least one of a feed amount in a conveying direction and a movement amount in a width direction of the strip-shaped electromagnetic steel sheet based on a value of an induced current in a coil generated by conveying the strip-shaped electromagnetic steel sheet. Progressive press device.

5. A method for controlling a progressive press device, which conveys a strip-shaped steel plate on which contour lines indicating punching positions of a plurality of presses are printed, and sequentially punches the strip-shaped steel plate using the plurality of presses based on the contour lines, comprising the steps of: Recognizing the shape of the contour line after punching of the strip steel plate; At least one of a feed amount in a conveying direction and a movement amount in a width direction of the strip steel plate is controlled based on the recognized shape of the contour line. The processing is carried out by a computer. Control methods.

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