Press device, control device, and computer program

Abstract

To provide a press device capable of preventing application of an overload from applied to a lower die from an upper die.SOLUTION: A slide position calculation part A1 calculates a residual movement distance d2 of a slide 7 on the basis of a detection result of a rotation detection part 17. A comparison part A2 compares a distance d1 in a vertical direction between a first detected part FD of an upper die 21 and a second detected part SD of a lower die 23, with the residual movement distance d2. A slide control part A3 controls a slide movement mechanism 5 on the basis of a comparison result of the comparison part A2. A rotation detection part 17 detects a rotation angle θs in a state where the slide 7 is stopped at a position above a bottom dead point BD of the slide 7. The distance d1 in the vertical direction represents a distance detected in a state where the slide 7 is stopped at the position above the bottom dead point BD of the slide 7. The residual movement distance d2 of the slide 7 represents a distance between a position in a vertical direction VD of the slide 7 when the distance d1 in the vertical direction is detected to the bottom dead point BD of the slide 7.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a press apparatus, a control apparatus, and a computer program. [Background technology]

[0002] A conventional press machine presses a workpiece using an upper die and a lower die. The press machine includes a slide, a bolster, a servo motor, and a motor command unit (see, for example, Patent Document 1). The upper die is attached to the slide. The lower die is placed on the bolster. The servo motor moves the slide back and forth in the vertical direction. When a proximity sensor that detects the approach of the upper die to a workpiece placed on the lower die detects the approach of the upper die to the workpiece, the motor command unit controls the servo motor to change the speed of the slide. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-137497 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in a conventional press machine, for example, due to incorrect adjustment of the die height or incorrect installation of the dies, an overload may be applied from the upper die to the lower die near the bottom dead center of the slide.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a press apparatus, a control device, and a computer program that can prevent an overload from being applied from the upper mold to the lower mold. [Means for solving the problem]

[0006] An exemplary press machine of the present invention includes a slide, a slide movement mechanism, a rotation detection unit, a bolster, a slide position calculation unit, a comparison unit, and a slide control unit. An upper die of a die for processing an object can be attached to the slide. The slide moves along a vertical direction. The slide movement mechanism converts a rotational motion into a reciprocating motion to move the slide along a vertical direction. The rotation detection unit detects a rotation angle of the rotational motion. A lower die of the die can be attached to the bolster. The slide position calculation unit calculates a remaining movement distance of the slide based on a detection result of the rotation detection unit. A comparison unit compares the remaining movement distance with an upper-lower distance, which is a distance between a first detection site of the upper die and a second detection site of the lower die. A slide control unit controls the slide movement mechanism based on a comparison result of the comparison unit. The rotation detection unit detects the rotation angle in a state in which the slide is stopped at a position above the bottom dead center of the slide. The vertical distance indicates a distance detected when the slide is stopped at the position above the bottom dead center of the slide. The remaining moving distance of the slide is the distance of the slide when the vertical distance is detected. Bottom Indicates the distance from the vertical position to the bottom dead center of the slide.

[0007] An exemplary control device of the present invention controls a press machine. The press machine includes a slide, a slide movement mechanism, a rotation detection unit, and a bolster. An upper die of a die for processing an object can be attached to the slide. The slide moves along a vertical direction. The slide movement mechanism converts a rotational motion into a reciprocating motion to move the slide along a vertical direction. The rotation detection unit detects a rotation angle of the rotational motion. A lower die of the die can be attached to the bolster. The control device includes a slide position calculation unit, a comparison unit, and a slide control unit. The slide position calculation unit calculates a remaining movement distance of the slide based on a detection result of the rotation detection unit. The comparison unit compares the remaining movement distance with an upper-lower distance, which is a distance between a first detection site of the upper die and a second detection site of the lower die. The slide control unit controls the slide movement mechanism based on a comparison result of the comparison unit. The rotation angle indicates an angle detected when the slide is stopped at a position above the bottom dead center of the slide. The vertical distance indicates a distance detected when the slide is stopped at the position above the bottom dead center of the slide. The remaining moving distance of the slide is the distance of the slide when the vertical distance is detected. Bottom Indicates the distance from the vertical position to the bottom dead center of the slide.

[0008] An exemplary computer program of the present invention causes a computer for controlling a press machine including a slide on which an upper die of a die for processing an object can be attached and which moves along a vertical direction, a slide movement mechanism for converting a rotational motion into a reciprocating motion and moving the slide along a vertical direction, a rotation detection unit for detecting a rotation angle of the rotational motion, and a bolster on which a lower die of the die can be attached, to execute the steps of: calculating a remaining movement distance of the slide based on a detection result of the rotation detection unit; comparing the remaining movement distance with an upper-lower distance, which is a distance between a first detection site of the upper die and a second detection site of the lower die; and controlling the slide movement mechanism based on a comparison result of the upper-lower distance and the remaining movement distance. The rotation angle indicates an angle detected when the slide is stopped at a position above the bottom dead center of the slide. The upper-lower distance indicates a distance detected when the slide is stopped at the position above the bottom dead center of the slide. The remaining movement distance of the slide is the angle of the slide when the upper-lower distance is detected. Bottom Indicates the distance from the vertical position to the bottom dead center of the slide. Effect of the Invention

[0009] According to the exemplary embodiment of the present invention, it is possible to provide a press apparatus, a control apparatus, and a computer program that can prevent an overload from being applied from an upper mold to a lower mold. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing a press device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a block diagram showing the press apparatus according to the present embodiment. [Diagram 3] FIG. 3 is a flowchart showing a method for controlling the press apparatus according to this embodiment. [Figure 4] FIG. 4 is a schematic diagram showing a press device according to a modified example of this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and description thereof will not be repeated.

[0012] First, a press apparatus 1 will be described with reference to FIG. 1. FIG. 1 is a schematic diagram showing a press apparatus 1 according to an embodiment of the present invention. In FIG. 1, the press apparatus 1 is viewed from the front. A die 2 for processing an object (not shown) is attached to the press apparatus 1. In FIG. 1, the object is not shown in order to simplify the drawing. The object is a workpiece, which is an object to be processed by the press apparatus 1. The object is made of, for example, metal. The object is, for example, a workpiece.

[0013] The press apparatus 1 processes an object using a die 2. Specifically, the press apparatus 1 presses the object using the die 2. The die 2 is made of, for example, metal. The die 2 includes an upper die 21 and a lower die 23. The press apparatus 1 presses the object by sandwiching it between the upper die 21 and the lower die 23. Note that, in FIG. 1, the die 2 is shown in a simplified form for ease of understanding, but in reality, the die 2 has a shape according to the purpose of press processing of the object.

[0014] 1, the press apparatus 1 includes a frame 3, a slide movement mechanism 5, a slide 7, a die height adjustment mechanism 9, and a bolster 11. The press apparatus 1 preferably further includes a distance detection unit 13.

[0015] The frame 3 includes a crown 31, a plurality of columns 33, and a bed 35. For example, the frame 3 includes four columns 33. The crown 31 is disposed above the bed 35. The bed 35 is placed on the floor surface. The plurality of columns 33 are disposed between the crown 31 and the bed 35. The plurality of columns 33 support the crown 31. However, the frame 3 may have a structure in which the crown 31, the plurality of columns 33, and the bed 35 are integrated rather than being separate.

[0016] The slide 7 and the bolster 11 are disposed between the crown 31 and the bed 35 .

[0017] The bolster 11 is disposed on the bed 35. Specifically, the bolster 11 is disposed on an upper surface 35a of the bed 35.

[0018] A lower die 23 can be attached to the bolster 11. Therefore, when processing an object, the lower die 23 is attached to the bolster 11. Specifically, the lower die 23 can be attached to an upper surface 11a of the bolster 11. Therefore, when processing an object, the lower die 23 is attached to an upper surface 11a of the bolster 11.

[0019] Lower die 23 includes lower die body 231 and a plurality of second protrusions 233. Lower die body 231 is attached to bolster 11. Second protrusions 233 protrude vertically upward from lower die body 231. Specifically, second protrusions 233 protrude vertically upward from upper portion 231a of lower die body 231. Second protrusions 233 have, for example, a substantially columnar or cylindrical shape.

[0020] An upper die 21 can be attached to the slide 7. Therefore, when processing an object, the upper die 21 is attached to the slide 7. Specifically, the upper die 21 can be attached to the lower surface 7a of the slide 7. Therefore, when processing an object, the upper die 21 is attached to the lower surface 7a of the slide 7.

[0021] The upper die 21 includes an upper die body 211 and a plurality of first protrusions 213. The upper die body 211 is attached to the slide 7. The first protrusions 213 protrude vertically downward from the upper die body 211. Specifically, the first protrusions 213 protrude vertically downward from a lower portion 211a of the upper die body 211. The first protrusions 213 have, for example, a substantially columnar or cylindrical shape.

[0022] The multiple first protrusions 213 respectively correspond to the multiple second protrusions 233. The first protrusions 213 and the second protrusions 233 face each other in the vertical direction VD.

[0023] The slide 7 moves along the vertical direction VD. Specifically, the slide 7 moves along a plurality of guides (not shown) extending along the vertical direction VD.

[0024] 1, for ease of explanation, the top dead center TD and the bottom dead center BD of the slide 7 are indicated by black dots. Also, for ease of explanation, the top dead center TD and the bottom dead center BD are indicated by the position of the lower surface 7a of the slide 7 in the vertical direction VD.

[0025] The slide 7 reciprocates between the top dead center TD and the bottom dead center BD along the vertical direction VD. As the slide 7 descends from the top dead center TD, the lower end 213a of the first protrusion 213 comes into contact with the upper end 233a of the second protrusion 233 at the bottom dead center BD. Therefore, the first protrusion 213 and the second protrusion 233 function as stoppers that regulate the descent of the slide 7. That is, each of the first protrusion 213 and the second protrusion 233 is, for example, a stroke end block. Note that in FIG. 1, the upper die body 211 and the lower die body 231 are shown in a simplified manner for ease of understanding, but in reality, when the first protrusion 213 and the second protrusion 233 are in contact with each other, an object is sandwiched between the upper die body 211 and the lower die body 231 and pressed.

[0026] The slide moving mechanism 5 converts the rotational motion into a reciprocating motion to move the slide 7 along the vertical direction VD. In the example of Fig. 1, the slide moving mechanism 5 moves the slide 7 along the vertical direction VD by a crank mechanism. That is, in the example of Fig. 1, the press device 1 performs a crank press.

[0027] The slide moving mechanism 5 is disposed in the crown 31. That is, the slide moving mechanism 5 is disposed above the slide 7. The slide moving mechanism 5 is connected to the slide 7 via a die-height adjustment mechanism 9.

[0028] The die-height adjustment mechanism 9 adjusts the position of the slide 7 in the vertical direction VD while the slide 7 is stopped. In the present embodiment, as an example, the die-height adjustment mechanism 9 adjusts the position of the slide 7 in the vertical direction VD while the slide 7 is stopped at the top dead center TD.

[0029] In other words, the die height adjustment mechanism 9 adjusts the die height. The die height is the distance from the bottom dead center BD of the slide 7 to the upper surface 11a of the bolster 11. Since the stroke length of the slide 7 is constant, adjusting the position of the slide 7 in the vertical direction VD while the slide 7 is stopped at the top dead center TD essentially corresponds to adjusting the die height. The stroke length indicates the distance from the top dead center TD to the bottom dead center BD of the slide 7.

[0030] The die-height adjustment mechanism 9 includes a connecting member 91. The slide movement mechanism 5 is connected to the slide 7 by the connecting member 91. The connecting member 91 includes, for example, a screw-type member such as a screw.

[0031] In the example of FIG. 1, the slide movement mechanism 5 includes a connecting rod 51, a crankshaft 52, a clutch (not shown), a flywheel 53, a belt 54, a pulley 55, and a motor 56.

[0032] A tip end of the connecting rod 51 is connected to the slide 7 via a connecting member 91. Meanwhile, a base end of the connecting rod 51 is connected to the crankshaft 52. The crankshaft 52 rotates in a rotational direction RD. The rotation of the crankshaft 52 in the rotational direction RD may be referred to as forward rotation. Note that the crankshaft 52 can also rotate in a rotational direction opposite to the rotational direction RD. The rotation of the crankshaft 52 in the rotational direction opposite to the rotational direction RD may be referred to as reverse rotation.

[0033] When the crankshaft 52 rotates, the connecting rod 51 connected to the crankshaft 52 reciprocates up and down. As a result, the slide 7 connected to the connecting rod 51 reciprocates along the vertical direction VD.

[0034] In the example of FIG. 1, when the crank angle θ of the crankshaft 52 is zero degrees, the slide 7 is located at top dead center TD. On the other hand, when the crank angle θ is 180 degrees, the slide 7 is located at bottom dead center BD. The crank angle θ indicates the rotation angle of the rotational motion when the slide moving mechanism 5 converts the rotational motion into reciprocating motion. In the example of FIG. 1, the crank angle θ indicates the rotation angle of the crankshaft 52. And, the crank angle θ when the crankshaft 52 is located at the uppermost end is set to zero degrees. The crank angle θ corresponds to an example of the "rotation angle of the rotational motion."

[0035] One axial end of the crankshaft 52 is connected to a flywheel 53 via a clutch (not shown). The crankshaft 52 rotates with the rotation of the flywheel 53. The flywheel 53 has, for example, a substantially disc shape or a substantially cylindrical shape.

[0036] The belt 54 is stretched under tension between the flywheel 53 and the pulley 55. The pulley 55 has a substantially disk shape or a substantially cylindrical shape.

[0037] The pulley 55 is connected to a rotating shaft of a motor 56. Therefore, when the motor 56 rotates, the pulley 55 rotates. When the pulley 55 rotates, the belt 54 rotates. When the belt 54 rotates, the flywheel 53 rotates. When the flywheel 53 rotates, the crankshaft 52 rotates. When the crankshaft 52 rotates, the connecting rod 51 reciprocates up and down. When the connecting rod 51 reciprocates up and down, the slide 7 reciprocates along the vertical direction VD. When the slide 7 reciprocates along the vertical direction VD, the upper mold 21 reciprocates along the vertical direction VD. As a result, the object is sandwiched between the upper mold 21 (specifically, the upper mold body 211) and the lower mold 23 (specifically, the lower mold body 231) to mold the object.

[0038] The distance detection unit 13 detects the vertical distance d1 of the mold 2. The vertical distance d1 is the distance in the vertical direction VD between the first detection target portion FD of the upper mold 21 and the second detection target portion SD of the lower mold 23. The first detection target portion FD and the second detection target portion SD face each other in the vertical direction VD, for example. In this embodiment, the first detection target portion FD indicates the lower end 213a of the first protrusion 213. The second detection target portion SD indicates the upper end 233a of the second protrusion 233.

[0039] 1, the distance detection unit 13 is fixed at a position separated from the die 2. Therefore, according to this embodiment, the manufacturer of the press apparatus 1 can sell the press apparatus 1 with the distance detection unit 13 incorporated therein. As a result, the convenience for the user of the press apparatus 1 and die 2 can be improved compared to the case where the distance detection unit 13 is fixed to the die 2. For example, the user of the press apparatus 1 and die 2 is not required to process the die 2 to fix the distance detection unit 13.

[0040] Specifically, the distance detection unit 13 is fixed to the frame 3 (for example, the column 33). In this case, for example, the distance detection unit 13 faces the space between the first protrusion 213 and the second protrusion 233 in the horizontal direction HD.

[0041] In this embodiment, the distance detection unit 13 is an image processing device. The image processing device includes a camera and a microcomputer. In this case, the camera of the distance detection unit 13 captures the first protrusion 213 and the second protrusion 233. Then, the microcomputer of the distance detection unit 13 analyzes the images of the first protrusion 213 and the second protrusion 233 included in the captured image to calculate the vertical distance d1 between the first detection site FD and the second detection site SD. Note that the distance detection unit 13 may include a camera and output the captured image to the control unit 151 (FIG. 2) described later. Then, the control unit 151 may analyze the images of the first protrusion 213 and the second protrusion 233 included in the captured image to calculate the vertical distance d1.

[0042] When the distance detection unit 13 is an image processing device, a marker may be placed on each of the first detection site FD and the second detection site SD in order to improve the detection accuracy by the distance detection unit 13. The marker is, for example, paint of a specific color.

[0043] Next, the press apparatus 1 will be described with reference to Fig. 2. Fig. 2 is a block diagram showing the press apparatus 1. As shown in Fig. 2, the press apparatus 1 further includes a slide position calculation unit A1, a comparison unit A2, a slide control unit A3, a die height adjustment instruction unit A4, and a setting unit A5.

[0044] Specifically, the press apparatus 1 includes a control device 15. The control device 15 controls the press apparatus 1. The control device 15 corresponds to an example of a "computer." As shown in FIG. 1, the control device 15 is fixed to, for example, the frame 3 (for example, the column 33). The position of the control device 15 is not particularly limited, and may be separated from the frame 3.

[0045] The control device 15 includes a control unit 151 , a storage unit 153 , and an operation display unit 155 .

[0046] Specifically, the control unit 151 includes a processor such as a CPU (Central Processing Unit). The storage unit 153 includes a storage device and stores data and computer programs. Specifically, the storage unit 153 includes a main storage device such as a semiconductor memory, and an auxiliary storage device such as a semiconductor memory, a solid state drive, and / or a hard disk drive. The storage unit 153 may include removable media. The storage unit 153 corresponds to an example of a non-transitory computer-readable storage medium.

[0047] The control unit 151 includes a slide position calculation unit A1, a comparison unit A2, a slide control unit A3, a die height adjustment instruction unit A4, and a setting unit A5. Specifically, the processor of the control unit 151 executes a computer program stored in the storage device of the storage unit 153 to function as the slide position calculation unit A1, the comparison unit A2, the slide control unit A3, the die height adjustment instruction unit A4, and the setting unit A5. The control unit 151 will be described in detail later.

[0048] Operation display unit 155 displays various information and accepts operations from a user. Specifically, operation display unit 155 includes an operation unit B1 and a display unit B2.

[0049] The operation unit B1 receives operations from a user. The operation unit B1 is, for example, a touch screen, or a keyboard and a mouse. When the operation unit B1 is a touch screen, the operation unit B1 and the display unit B2 are disposed so as to overlap each other.

[0050] For example, the operation unit B1 receives a die-height adjustment instruction from a user. Then, the operation unit B1 outputs the die-height adjustment instruction to the die-height adjustment instructing unit A4. The die-height adjustment instruction includes an adjustment amount of the die-height. Then, the die-height adjustment instructing unit A4 instructs the die-height adjustment mechanism 9 to adjust the die-height based on the die-height adjustment amount. As a result, the die-height adjustment mechanism 9 adjusts the die-height by the instructed die-height adjustment amount. Specifically, the die-height adjustment mechanism 9 further includes a drive unit 92. The drive unit 92 is, for example, an induction motor or a servo motor. The drive unit 92 adjusts the die height by driving the connecting member 91 while the slide 7 is stopped.

[0051] For example, operation unit B1 receives from the user various setting values ​​(including stroke length) for the slide 7 and the slide moving mechanism 5. Then, setting unit A5 stores in memory unit 153 the various setting values ​​received by operation unit B1.

[0052] The display unit B2 displays various information. The display unit B2 is, for example, a liquid crystal display or an organic electroluminescence display. The display unit B2 corresponds to an example of a "notification unit."

[0053] The press apparatus 1 further includes a rotation detection unit 17. The rotation detection unit 17 detects the crank angle θ. The rotation detection unit 17 is attached to, for example, the crankshaft 52. The rotation detection unit 17 detects the crank angle θ of the crankshaft 52, and outputs a detection signal indicating the crank angle θ to the control unit 151. The rotation detection unit 17 is, for example, a rotation encoder.

[0054] The press apparatus 1 further includes an operation instruction input unit 19. The operation instruction input unit 19 accepts input of an instruction to operate the press apparatus 1 from a user. The operation instruction input unit 19 is, for example, a button switch. The operation instruction input unit 19 may be included in the operation unit B1. The press apparatus 1 may also accept an operation instruction from an external device.

[0055] The slide control unit A3 controls the slide movement mechanism 5. For example, the slide control unit A3 controls a clutch (not shown) disposed between the crankshaft 52 and the flywheel 53 to switch between transmission and interruption of rotational force from the flywheel 53 to the crankshaft 52. For example, when the driving instruction input unit 19 accepts input of a driving instruction, the slide control unit A3 controls the clutch to transmit the rotational force from the flywheel 53 to the crankshaft 52. As a result, the slide 7 reciprocates along the vertical direction VD.

[0056] 1 and 2, the control unit 151, the rotation detection unit 17, and the distance detection unit 13 will be described.

[0057] The rotation detection unit 17 detects the crank angle θ (hereinafter referred to as "crank angle θs") in a state in which the slide 7 is stopped at a position above the bottom dead center BD of the slide 7. In other words, the crank angle θs indicates an angle detected in a state in which the slide 7 is stopped at a position above the bottom dead center BD of the slide 7. The rotation detection unit 17 outputs a detection signal indicating the crank angle θs to the slide position calculation unit A1.

[0058] The distance detection unit 13 detects the upper and lower distance d1 of the die 2 at the stop position of the slide 7 when the rotation detection unit 17 detects the crank angle θs. That is, the distance detection unit 13 detects the upper and lower distance d1 of the die 2 in a state in which the slide 7 is stopped at a position above the bottom dead center BD of the slide 7. Therefore, the upper and lower distance d1 of the die 2 indicates the distance detected in a state in which the slide 7 is stopped at a position above the bottom dead center BD of the slide 7. The distance detection unit 13 outputs a detection signal indicating the upper and lower distance d1 of the die 2 to the comparison unit A2.

[0059] The slide position calculation unit A1 calculates the remaining travel distance d2 of the slide 7 based on the detection result of the rotation detection unit 17. In this embodiment, the slide position calculation unit A1 calculates the remaining travel distance d2 of the slide 7 based on the crank angle θs detected by the rotation detection unit 17. The remaining travel distance d2 of the slide 7 indicates the distance from the position of the slide 7 in the vertical direction VD when the top-bottom distance d1 of the mold 2 is detected to the bottom dead center BD of the slide 7.

[0060] For example, the distance d from the current position P of the slide 7 to the bottom dead center BD is expressed by equation (1). In equation (1), "SL" is the stroke length of the slide 7. f(θ) is a function expressing the distance from the top dead center TD of the slide 7 to the current position P, and "θ" is the crank angle θ. When the crank angle θ is input into the function f(θ), the distance from the top dead center TD of the slide 7 to the current position P is output.

[0061] d = SL - f(θ) … (1)

[0062] The slide position calculation unit A1 inputs the crank angle θs into the formula (1) to calculate the remaining movement distance d2 of the slide 7 as shown in the formula (2).

[0063] d2=SL-f(θs) …(2)

[0064] The comparison unit A2 compares the vertical distance d1 of the mold 2 with the remaining movement distance d2 of the slide 7. Then, the slide control unit A3 controls the slide movement mechanism 5 based on the comparison result of the comparison unit A2. Therefore, according to this embodiment, the slide control unit A3 can predict whether or not an overload will be applied from the upper mold 21 to the lower mold 23 based on the comparison result of the comparison unit A2 before the upper mold 21 and the lower mold 23 come into contact with each other. Then, the slide control unit A3 can prevent the upper mold 21 from applying an overload to the lower mold 23 by controlling the slide movement mechanism 5 based on the prediction result. For example, the slide control unit A3 can prevent the upper mold 21 from applying an overload to the lower mold 23 by predicting whether or not an overload will be applied from the upper mold 21 to the lower mold 23 before the processing of the object by the mold 2 and controlling the slide movement mechanism 5 based on the prediction result. If the overload can be prevented from being applied from the upper mold 21 to the lower mold 23, the durability of the mold 2 can be improved. Moreover, since the application of an overload to the press device 1 is prevented, the durability of the press device 1 can be improved.

[0065] For example, the slide control unit A3 can predict whether or not a stick state will occur based on a comparison result between the distance d1 between the top and bottom of the die 2 and the remaining movement distance d2 of the slide 7. Then, when the slide control unit A3 predicts that a stick state will occur, it can prevent the occurrence of the stick state by prohibiting the movement (e.g., descent) of the slide 7. Also, in this embodiment, since it is not necessary to have a hydraulic stick avoidance mechanism, the manufacturing cost of the press device 1 can be reduced.

[0066] The sticking state refers to a state in which, for example, when the slide 7 is located near the bottom dead center BD, the upper die 21 (for example, the first protruding portion 213) gets caught in the lower die 23 (for example, the second protruding portion 233) due to an overload, making it difficult for the upper die 21 to separate from the lower die 23. When a sticking state occurs in the press device 1, for example, in the slide moving mechanism 5, it becomes difficult to both rotate the rotational motion forward and backward when converting the rotational motion into a reciprocating motion, making it difficult to move the slide 7.

[0067] Specifically, the comparison unit A2 subtracts the top-bottom distance d1 of the mold 2 from the remaining travel distance d2 of the slide 7 to calculate the difference value DF (=d2-d1) which is the subtraction value. If the difference value DF is greater than the threshold value TH, there is a possibility that an overload will be applied from the upper mold 21 to the lower mold 23 near the bottom dead center BD of the slide 7. In other words, there is a possibility that the slide 7 will descend too far beyond the top-bottom distance d1 of the mold 2, and an overload will be applied from the upper mold 21 to the lower mold 23. The threshold value TH is a real number equal to or greater than zero. The threshold value TH indicates the excess distance vertically downward of the slide 7 relative to the position of the slide 7 when the top-bottom distance d1 is zero. The threshold value TH is determined experimentally and / or empirically.

[0068] Therefore, the slide control unit A3 prohibits the movement of the slide 7 when a difference value DF obtained by subtracting the upper-lower distance d1 of the mold 2 from the remaining movement distance d2 of the slide 7 is greater than the threshold value TH. Therefore, according to this embodiment, it is possible to effectively prevent an overload from being applied from the upper mold 21 to the lower mold 23. For example, it is possible to effectively prevent the occurrence of a sticking state.

[0069] Specifically, the slide control unit A3 controls the slide movement mechanism 5 to prohibit the movement of the slide 7 when the difference value DF is greater than the threshold value TH.

[0070] For example, when the difference value DF is greater than the threshold value TH, the slide control unit A3 controls a clutch (not shown) disposed between the crankshaft 52 and the flywheel 53 to interrupt the transmission of rotational force from the flywheel 53 to the crankshaft 52. As a result, the movement of the slide 7 is prohibited.

[0071] In particular, when the difference value DF is greater than the threshold value TH, the slide control unit A3 prohibits the movement of the slide 7 even when the driving instruction input unit 19 accepts the input of a driving instruction.

[0072] On the other hand, when the difference value DF is equal to or smaller than the threshold value TH, the slide control unit A3 permits the movement of the slide 7.

[0073] Specifically, when the difference value DF is equal to or smaller than the threshold value TH, when the operation instruction input unit 19 accepts an input of an instruction to operate the press machine 1, the slide control unit A3 controls the slide moving mechanism 5 to drive the slide 7. As a result, the slide 7 reciprocates along the vertical direction VD.

[0074] For example, when the difference value DF is equal to or smaller than the threshold value TH, when the operation instruction input unit 19 receives an input of an instruction to operate the press apparatus 1, the slide control unit A3 controls a clutch (not shown) disposed between the crankshaft 52 and the flywheel 53 to transmit a rotational force from the flywheel 53 to the crankshaft 52. As a result, the slide 7 is driven.

[0075] In this embodiment, the slide control unit A3 controls the display unit B2 to notify the user that the die height is abnormal when the difference value DF is greater than the threshold value TH. Therefore, when the difference value DF is greater than the threshold value TH, the display unit B2 notifies the user that the die height is abnormal. As a result, this embodiment can urge the user to adjust the die height. Furthermore, by adjusting the die height, it is possible to prevent an overload from being applied from the upper die 21 to the lower die 23.

[0076] For example, the display unit B2 directly or indirectly notifies that the die height is abnormal. Direct notifications are, for example, "The die height is abnormal" or "The die height is too small." Indirect notifications are, for example, "Please adjust the die height," "An overload may be applied from the upper die to the lower die," or "A sticking state may occur."

[0077] In this embodiment, as an example, after the position of the slide 7 in the vertical direction VD is adjusted while the slide 7 is stopped and before the slide 7 reaches the bottom dead center BD, the rotation detection unit 17 detects the crank angle θs, the slide position calculation unit A1 calculates the remaining movement distance d2 of the slide 7 based on the crank angle θs detected by the rotation detection unit 17, and the distance detection unit 13 detects the vertical distance d1 of the mold 2. In addition, after the position of the slide 7 in the vertical direction VD is adjusted while the slide 7 is stopped and before the slide 7 reaches the bottom dead center BD, the comparison unit A2 compares the vertical distance d1 of the mold 2 with the remaining movement distance d2 of the slide 7, and the slide control unit A3 controls the slide movement mechanism 5 based on the comparison result of the comparison unit A2.

[0078] For example, when the position of the slide 7 in the vertical direction VD is adjusted by the die-height adjustment mechanism 9 while the slide 7 is stationary, erroneous adjustment may occur due to an operation error by a user. The erroneous adjustment of the position of the slide 7 may cause an overload from the upper die 21 to the lower die 23. Therefore, after the position of the slide 7 in the vertical direction VD is adjusted and before the slide 7 reaches the bottom dead center BD, the slide control unit A3 controls the slide moving mechanism 5 based on the comparison result of the comparison unit A2, thereby efficiently preventing an overload from being applied from the upper die 21 to the lower die 23.

[0079] Also, in this embodiment, as an example, immediately after the die 2 is attached to the press apparatus 1 and before the slide 7 reaches the bottom dead center BD, the rotation detection unit 17 detects the crank angle θs, the slide position calculation unit A1 calculates the remaining movement distance d2 of the slide 7 based on the crank angle θs detected by the rotation detection unit 17, and the distance detection unit 13 detects the upper-lower distance d1 of the die 2. In addition, immediately after the die 2 is attached to the press apparatus 1 and before the slide 7 reaches the bottom dead center BD, the comparison unit A2 compares the upper-lower distance d1 of the die 2 with the remaining movement distance d2 of the slide 7, and the slide control unit A3 controls the slide movement mechanism 5 based on the comparison result of the comparison unit A2.

[0080] For example, if the die 2 is attached to the press device 1 incorrectly, or if an incorrect die 2 is attached to the press device 1, this may cause an overload from the upper die 21 to the lower die 23. Therefore, immediately after the die 2 is attached to the press device 1 and before the slide 7 reaches the bottom dead center BD, the slide control unit A3 controls the slide movement mechanism 5 based on the comparison result of the comparison unit A2, thereby efficiently preventing the upper die 21 from applying an overload to the lower die 23.

[0081] It should be noted that mounting the die 2 on the press device 1 means that an upper die 21 is mounted on the slide 7 and a lower die 23 is mounted on the bolster 11 .

[0082] 1, in this embodiment, the first detection site FD indicates the lower end 213a of the first protrusion 213. The second detection site SD indicates the upper end 233a of the second protrusion 233. Therefore, the vertical distance d1 of the mold 2 detected by the distance detection unit 13 is the distance between the lower end 213a of the first protrusion 213 of the upper mold 21 and the upper end 233a of the second protrusion 233 of the lower mold 23.

[0083] Therefore, in this embodiment, the slide control unit A3 can predict whether or not an overload will be applied from the first protruding portion 213 to the second protruding portion 233 based on the comparison result of the comparison unit A2 before the first protruding portion 213 of the upper die 21 comes into contact with the second protruding portion 233 of the lower die 23. Then, the slide control unit A3 can prevent an overload from being applied from the first protruding portion 213 to the second protruding portion 233 by controlling the slide movement mechanism 5 based on the prediction result.

[0084] For example, the slide control unit A3 can predict whether or not a stick state will occur due to the first protrusion 213 getting caught in the second protrusion 233. Then, when predicting that a stick state will occur, the slide control unit A3 can prevent the occurrence of the stick state by prohibiting the movement (e.g., downward movement) of the slide 7.

[0085] Next, a control method of the press apparatus 1 will be described with reference to Fig. 2 and Fig. 3. Fig. 3 is a flowchart showing the control method of the press apparatus 1. As shown in Fig. 3, the control method includes steps S1 to S9. A computer program stored in the storage unit 153 in Fig. 2 causes the control device 15 (specifically, the control unit 151) to execute the processes of steps S1 to S9.

[0086] As shown in FIG. 3, steps S1 and S3 are executed in parallel.

[0087] Specifically, first, in step S1, the rotation detection unit 17 detects the crank angle θs in a state in which the slide 7 is stopped at a position above the bottom dead center BD of the slide 7. Then, the slide position calculation unit A1 obtains the crank angle θs from the rotation detection unit 17.

[0088] Next, in step S2, the slide position calculation unit A1 calculates the remaining movement distance d2 of the slide 7 based on the crank angle θs which is the detection result of the rotation detection unit 17.

[0089] On the other hand, in step S3, the distance detection unit 13 detects the vertical distance d1 of the mold 2 in a state in which the slide 7 is stopped at a position above the bottom dead center BD of the slide 7. Then, the comparison unit A2 obtains the vertical distance d1 of the mold 2 from the distance detection unit 13.

[0090] Next, in step S4, the comparison unit A2 subtracts the upper-lower distance d1 of the mold 2 from the remaining movement distance d2 of the slide 7 to calculate a difference value DF.

[0091] Next, in step S5, the comparison unit A2 judges whether or not the difference value DF is greater than the threshold value TH. That is, the comparison unit A2 compares the distance d1 between the top and bottom of the mold 2 with the remaining movement distance d2 of the slide 7.

[0092] If it is determined in step S5 that the difference value DF is greater than the threshold value TH (Yes), the process proceeds to step S7.

[0093] Next, in step S7, the slide control unit A3 controls the slide movement mechanism 5 to prohibit the movement of the slide 7. That is, the slide control unit A3 controls the slide movement mechanism 5 based on the comparison result of the comparison unit A2 to prohibit the movement of the slide 7.

[0094] Next, in step S8, the slide control unit A3 controls the display unit B2 to notify that the die height is abnormal. As a result, the display unit B2 notifies that the die height is abnormal.

[0095] Next, in step S9, the die-height adjustment instructing unit A4 instructs the die-height adjustment mechanism 9 to adjust the die-height based on the die-height adjustment amount received by the operation unit B1. As a result, the die-height adjustment mechanism 9 adjusts the die-height by the instructed die-height adjustment amount. Then, the process proceeds to steps S1 and S3.

[0096] On the other hand, if it is determined in step S5 that the difference value DF is equal to or smaller than the threshold value TH (No), the process proceeds to step S6.

[0097] Next, in step S6, the slide control unit A3 controls the slide movement mechanism 5 to permit movement of the slide 7. That is, the slide control unit A3 controls the slide movement mechanism 5 based on the comparison result of the comparison unit A2 to permit movement of the slide 7. Then, the process ends.

[0098] As described above with reference to FIG. 3, according to this embodiment, by prohibiting the movement of the slide 7 when the difference value DF is greater than the threshold value TH, it is possible to prevent an overload from being applied from the upper die 21 to the lower die 23.

[0099] Note that step S3 may be executed after step S1, or step S1 may be executed after step S3. In other words, the order of steps S1 and S3 is not particularly limited.

[0100] (Modification) A press apparatus 1A according to a modified example of the embodiment of the present invention will be described with reference to Fig. 4. The press apparatus 1A according to the modified example mainly differs from the press apparatus 1 (Fig. 1) in which the distance detection unit 13 is separated from the die 2 in that the distance detection unit 13A of the press apparatus 1A is fixed to the die 2. Below, the points in which the modified example differs from the embodiment described with reference to Fig. 1 will be mainly described.

[0101] FIG. 4 is a schematic diagram showing a press apparatus 1A according to a modified example of the embodiment of the present invention. As shown in FIG. 4, the distance detection unit 13A is fixed to the die 2. For example, the distance detection unit 13A is embedded in the die 2. The distance detection unit 13A detects the distance d1A between the top and bottom of the die 2. According to the modified example, the user can fix the distance detection unit 13A to a desired position of the die 2. In addition, in the modified example, for example, a relatively inexpensive distance detection unit 13A can be used. The distance detection unit 13A is, for example, a laser displacement sensor, an LED (Light Emitting Diode) displacement sensor, an eddy current displacement sensor, or an ultrasonic displacement sensor.

[0102] 4, the distance detection unit 13A is fixed to the upper mold 21. Specifically, the distance detection unit 13A is fixed to the upper mold body 211. For example, the distance detection unit 13A is embedded in the upper mold body 211.

[0103] The distance detection unit 13A may be fixed to the lower mold 23. Specifically, the distance detection unit 13A is fixed to the lower mold body 231. For example, the distance detection unit 13A is embedded in the lower mold body 231.

[0104] Furthermore, when the distance detection unit 13A includes two elements, one element may be fixed to the upper mold 21 (for example, the upper mold body 211), and the other element may be fixed to the lower mold 23 (for example, the lower mold body 231).

[0105] Here, in the modified example, as an example, the first detection portion FDA indicates the specific portion 211b of the upper mold body 211, and the second detection portion SDA indicates the specific portion 231b of the lower mold body 231. The vertical distance d1A of the mold 2 is the distance in the vertical direction VD between the first detection portion FDA and the second detection portion SDA.

[0106] In the example of Fig. 4, the first detection part FDA is located at the lower part 211a of the upper mold body 211. The first detection part FDA indicates a part of the upper mold body 211 that is different from the part that contacts the target object (workpiece). On the other hand, the second detection part SDA is located at the upper part 231a of the lower mold body 231. The second detection part SDA indicates a part of the lower mold body 231 that is different from the part that contacts the target object (workpiece). In the example of Fig. 4, the first detection part FDA and the second detection part SDA face each other in the vertical direction VD.

[0107] 2 compares the vertical distance d1A of the mold 2 with the remaining movement distance d2 of the slide 7. Then, the slide control unit A3 controls the slide movement mechanism 5 based on the comparison result of the comparison unit A2. As a result, in the modified example, it is possible to prevent an overload from being applied from the upper mold 21 to the lower mold 23, similar to the embodiment described with reference to FIGS. 1 and 2.

[0108] Specifically, comparison unit A2 subtracts the distance d1A between the top and bottom of mold 2 from the remaining travel distance d2 of slide 7 to calculate a difference value DFA, which is the subtraction value. In this case, difference value DFA indicates a negative value. Therefore, the larger the difference value DFA is, that is, the smaller the absolute value of difference value DFA is, the closer slide 7 is to bolster 11 at bottom dead center BD of slide 7. As a result, there is a possibility that an overload will be applied from upper mold 21 to lower mold 23 near bottom dead center BD of slide 7.

[0109] Therefore, the comparison unit A2 judges whether the difference value DFA is larger than a threshold value THA. The threshold value THA indicates the distance in the vertical direction VD between the first detection part FDA and the second detection part SDA when an allowable limit load is applied from the upper mold 21 to the lower mold 23. The threshold value THA is a real number smaller than zero. The threshold value THA is determined experimentally and / or empirically.

[0110] Then, when the difference value DFA is greater than the threshold value THA, the slide control unit A3 controls the slide movement mechanism 5 to prohibit the movement of the slide 7. As a result, it is possible to effectively prevent an overload from being applied from the upper die 21 to the lower die 23. Otherwise, the operation of the slide control unit A3 according to the modified example is similar to the operation of the slide control unit A3 according to the embodiment described with reference to FIGS. 1 and 2.

[0111] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. In addition, the components disclosed in the above embodiments can be modified as appropriate. For example, a certain component among all the components shown in one embodiment may be added to a component of another embodiment, or some components among all the components shown in one embodiment may be deleted from the embodiment.

[0112] In addition, the drawings are mainly schematic illustrations of each component to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. In addition, the configurations of each component shown in the above embodiment are merely examples and are not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially deviate from the effects of the present invention.

[0113] (1) In the embodiment described with reference to Fig. 1, the first detectable part FD indicates the lower end 213a of the first protruding part 213, and the second detectable part SD indicates the upper end 233a of the second protruding part 233. However, as long as the first detectable part FD is located in the upper mold 21 and the second detectable part SD is located in the lower mold 23, the positions of the first detectable part FD and the second detectable part SD are not particularly limited. In this case, for example, the first detectable part FD and the second detectable part SD are located on a straight line along the vertical direction VD.

[0114] For example, the first detection portion FD may be a portion of the first protrusion 213 other than the lower end 213a, or may be a portion of the upper mold body 211. When the first detection portion FD is a portion of the upper mold body 211, the first detection portion FD is a portion of the upper mold body 211 other than a portion that comes into contact with the target object (workpiece).

[0115] For example, the second detection target portion SD may be a portion of the second protruding portion 233 other than the upper end 233a, or may be a portion of the lower die body 231. When the second detection target portion SD is a portion of the lower die body 231, the second detection target portion SD is a portion of the lower die body 231 other than a portion that comes into contact with the target object (workpiece).

[0116] As an example, as shown in FIG. 1, a case will be described in which the first detection area FDA is a specific area on the side of the upper mold body 211, and the second detection area SDA is a specific area on the side of the lower mold body 231. Each of the first detection area FDA and the second detection area SDA may include a marker. The marker is, for example, a paint of a specific color or a light-reflecting material. The distance detection unit 13 detects the vertical distance d1A of the mold 2. The vertical distance d1A is the distance in the vertical direction VD between the first detection area FDA and the second detection area SDA. In this example, the processing of the comparison unit A2 and the slide control unit A3 shown in FIG. 2 is the same as the processing of the comparison unit A2 and the slide control unit A3 according to the modified example described with reference to FIG. 4.

[0117] (2) In the modification described with reference to Fig. 4, the first detection part FDA indicates the specific part 211b of the upper mold body 211, and the second detection part SDA indicates the specific part 231b of the lower mold body 231. However, the positions of the first detection part FDA and the second detection part SDA are not particularly limited, so long as the first detection part FDA is located in the upper mold 21 and the second detection part SDA is located in the lower mold 23. In this case, for example, the first detection part FDA and the second detection part SDA are located on a straight line along the vertical direction VD.

[0118] For example, the first detection site FDA may be a site in the upper mold body 211 different from the specific site 211b, or may be a site in the first protruding portion 213 (for example, the lower end 213a). For example, the second detection site SDA may be a site in the lower mold body 231 different from the specific site 231b, or may be a site in the second protruding portion 233 (for example, the upper end 233a).

[0119] As an example, as shown in FIG. 4, the first detection site FD is the lower end 213a of the first protrusion 213, and the second detection site SD is the upper end 233a of the second protrusion 233. In this case, the distance detection unit 13A is fixed to, for example, the first protrusion 213 or the second protrusion 233. Then, the distance detection unit 13A detects the vertical distance d1 of the mold 2. The vertical distance d1 is the distance in the vertical direction VD between the first detection site FD and the second detection site SD. In this example, the processing of the comparison unit A2 and the slide control unit A3 shown in FIG. 2 is similar to the processing of the comparison unit A2 and the slide control unit A3 of the embodiment described with reference to FIG. 1 and FIG. 2. Note that, when the distance detection unit 13A has two elements, one element may be fixed to the first protrusion 213, and the other element may be fixed to the second protrusion 233.

[0120] (3) In the embodiment and modified examples described with reference to Figures 1 and 4, the slide movement mechanism 5 includes a clutch (not shown), a flywheel 53, a belt 54, and a pulley 55. However, the configuration of the slide movement mechanism 5 is not particularly limited as long as it is capable of converting rotational motion into reciprocating motion.

[0121] For example, in the slide movement mechanism 5, the motor 56 may be directly connected to the crankshaft 52. Specifically, the motor 56 may be connected to the crankshaft 52 via a gear (not shown). In this case, the motor 56 is a servo motor. In this case, the rotation detection unit 17 is attached to the rotation shaft of the motor 56 and detects the rotation angle of the motor 56. Furthermore, the rotation detection unit 17 outputs a detection signal indicating the rotation angle of the motor 56 to the control unit 151. Then, the control unit 151 calculates the crank angle θ based on the rotation angle of the motor 56.

[0122] In this example, the slide control unit A3 in FIG. 2 controls the motor 56 to switch between transmitting and blocking the rotational force from the motor 56 to the crankshaft 52.

[0123] For example, when the difference values ​​DF, DFA are greater than the threshold values ​​TH, THA, the slide control unit A3 stops the motor 56 and interrupts the transmission of rotational force from the motor 56 to the crankshaft 52. As a result, the movement of the slide 7 is prohibited. On the other hand, when the difference values ​​DF, DFA are equal to or less than the threshold values ​​TH, THA, for example, and the operation instruction input unit 19 accepts the input of an operation instruction for the press apparatus 1, the slide control unit A3 drives the motor 56 to transmit the rotational force from the motor 56 to the crankshaft 52. As a result, the slide 7 is driven and reciprocates along the vertical direction VD.

[0124] 1 and 4, a crank mechanism is used as the slide moving mechanism 5. However, the slide moving mechanism 5 may move the slide 7 along the vertical direction VD by, for example, a link mechanism. That is, the press apparatus 1 may perform a link press. The slide moving mechanism 5 may move the slide 7 along the vertical direction VD by, for example, a knuckle mechanism. That is, the press apparatus 1 may perform a knuckle press.

[0125] (4) In the embodiment and the modified example described with reference to Fig. 1 and Fig. 4, when the difference values ​​DF, DFA are larger than the threshold values ​​TH, THA, the display unit B2 notifies the user that the die height is abnormal. However, in this case, an audio output unit such as a speaker may notify the user that the die height is abnormal. In this case, the audio output unit corresponds to an example of a "notification unit". [Industrial Applicability]

[0126] The present invention can be used in, for example, a press apparatus, a control apparatus, and a computer program. [Explanation of symbols]

[0127] 1. 1A Press Device 2. Mold 5 Slide movement mechanism 7 Slides 11 Bolster 13, 13A Distance detection unit 15 Control device (computer) 17 Rotation detector 21 Upper mold 23 Lower mold 213 1st protrusion 233 Second protrusion A1 Slide position calculation section A2 Comparison section A3 Slide control section B2 Display section (notification section)

Claims

1. A slide on which an upper die of a die for processing an object can be attached and which moves along a vertical direction; a slide moving mechanism that converts a rotational motion into a reciprocating motion to move the slide along a vertical direction; A rotation detection unit that detects a rotation angle of the rotational motion; a bolster to which a lower die of the die can be attached; a slide position calculation unit that calculates a remaining movement distance of the slide based on a detection result of the rotation detection unit; a comparison unit that compares a top-bottom distance, which is a distance between a first detection portion of the upper mold and a second detection portion of the lower mold, with the remaining movement distance; a slide control unit that controls the slide moving mechanism based on a comparison result of the comparison unit; Equipped with the rotation detection unit detects the rotation angle in a state in which the slide is stopped at a position above a bottom dead center of the slide, the vertical distance indicates a distance detected in the state in which the slide is stopped at the position above the bottom dead center of the slide, A press apparatus, wherein the remaining travel distance of the slide indicates the distance from the vertical position of the lower surface of the slide when the top-bottom distance is detected to the bottom dead center of the slide.

2. The upper mold includes a first protruding portion protruding vertically downward, The lower mold includes a second protruding portion protruding vertically upward, The first protrusion and the second protrusion face each other in a vertical direction, As the slide descends from the top dead center, the lower end of the first protrusion comes into contact with the upper end of the second protrusion, the first detection portion indicates the lower end of the first protrusion, The pressing device according to claim 1 , wherein the second detection portion indicates the upper end of the second protrusion.

3. 3. The press apparatus according to claim 1, wherein after a vertical position of a lower surface of the slide is adjusted while the slide is stopped and before the slide reaches a bottom dead center, the comparison unit compares the upper-lower distance with the remaining movement distance, and the slide control unit controls the slide movement mechanism based on a comparison result of the comparison unit.

4. The press apparatus according to claim 1 , wherein the slide control unit prohibits movement of the slide when a difference value obtained by subtracting the top-bottom distance from the remaining movement distance is greater than a threshold value.

5. 5. The press apparatus according to claim 4, further comprising a notification unit that notifies the user that the die height is abnormal when the difference value is greater than the threshold value.

6. A distance detection unit that detects the upper and lower distance is further provided, The press apparatus according to claim 1 , wherein the distance detection unit is fixed at a position spaced apart from the die.

7. The press apparatus according to claim 1 , wherein the vertical distance is detected by a distance detection unit fixed to the die.

8. A slide on which an upper die of a die for processing an object can be attached and which moves along a vertical direction; a slide moving mechanism that converts a rotational motion into a reciprocating motion to move the slide along a vertical direction; A rotation detection unit that detects a rotation angle of the rotational motion; a bolster to which a lower die of the die can be attached; A control device for controlling a press device comprising: a slide position calculation unit that calculates a remaining movement distance of the slide based on a detection result of the rotation detection unit; a comparison unit that compares a top-bottom distance, which is a distance between a first detection portion of the upper mold and a second detection portion of the lower mold, with the remaining movement distance; a slide control unit that controls the slide moving mechanism based on a comparison result of the comparison unit; Equipped with the rotation angle indicates an angle detected when the slide is stopped at a position above the bottom dead center of the slide, the vertical distance indicates a distance detected in the state in which the slide is stopped at the position above the bottom dead center of the slide, A control device, wherein the remaining travel distance of the slide indicates the distance from the vertical position of the lower surface of the slide when the top-bottom distance is detected to the bottom dead center of the slide.

9. A slide on which an upper die of a die for processing an object can be attached and which moves along a vertical direction; a slide moving mechanism that converts a rotational motion into a reciprocating motion to move the slide along a vertical direction; A rotation detection unit that detects a rotation angle of the rotational motion; a bolster to which a lower die of the die can be attached; A computer that controls a press device comprising: calculating a remaining movement distance of the slide based on a detection result of the rotation detection unit; comparing a top-bottom distance, which is a distance between a first detection portion of the upper mold and a second detection portion of the lower mold, with the remaining movement distance; controlling the slide movement mechanism based on a comparison result between the vertical distance and the remaining movement distance; Run the command, the rotation angle indicates an angle detected when the slide is stopped at a position above the bottom dead center of the slide, the vertical distance indicates a distance detected in the state in which the slide is stopped at the position above the bottom dead center of the slide, The remaining travel distance of the slide indicates the distance from the vertical position of the lower surface of the slide when the top-bottom distance is detected to the bottom dead center of the slide.

Images