Press device, diagnostic system, and soundness diagnostic method and soundness diagnostic program of press device

Abstract

To diagnose soundness of a clutch or a brake preferably.SOLUTION: A press device 1 includes: an eccentric shaft 16 which causes a slide 18 to move forward or rearward in a press direction in conjunction with rotation; a clutch 131 or a brake 132 which rotationally drives or brakes the eccentric shaft 16; a pressure gauge 455 which detects the pressure of working fluid of the clutch 131 or the brake 132; and a control unit 53. The control unit 53 determines whether the operation of the slide 18 is in a stable operation state in which the operation is stable on the basis of at least one of the temperature of the working fluid, the number of shots of the pressing operation of the slide 18 and an operation time. When the slide 18 is in the stable operation state, soundness of the clutch 132 or the brake 132 is diagnosed on the basis of the pressure of the working fluid.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a press machine, a diagnosis device, and a soundness diagnosis method and a soundness diagnosis program for a press machine. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there has been known a press machine that is provided with a wet clutch brake that performs rotational driving and braking of an eccentric shaft. In the press machine described in Patent Document 1, an abnormality in the clutch brake is detected based on the slip angle of the clutch brake. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-185586 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, since it is difficult to accurately measure the slip angle of a clutch brake, it is difficult to judge an abnormality based on the slip angle. In particular, in the case of a clutch, the slip is zero until the discs come into contact, so it is not possible to make a judgment before the discs come into contact.

[0005] The present invention has been made in consideration of the above circumstances, and has an object to preferably diagnose the soundness of a clutch or brake. [Means for solving the problem]

[0006] The press device according to the present invention comprises: A rotation shaft that moves the slide forward and backward in the pressing direction as it rotates; a clutch or brake for rotating or braking the rotating shaft; A detection unit that detects the pressure of the hydraulic fluid of the clutch or brake; a determination unit that determines whether or not the operation of the slide is in a stable operating state based on at least one of the temperature of the hydraulic fluid, the number of shots in the pressing operation of the slide, and an operating time; a diagnosis unit that diagnoses the soundness of the clutch or brake based on the pressure of the hydraulic fluid when the stable operating state is reached; Equipped with. Effect of the Invention

[0007] According to the present invention, the soundness of a clutch or brake can be suitably diagnosed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a view showing a main body of the press apparatus according to the embodiment. [Diagram 2] FIG. 2 is a diagram for explaining the configuration of a clutch brake according to the embodiment. [Diagram 3] FIG. 2 is a block diagram showing a schematic control configuration of the press apparatus according to the present embodiment. [Figure 4] 4 is a flowchart showing the flow of a health diagnosis process in the present embodiment. [Diagram 5] 4 is a graph showing an example of a change in pressure of hydraulic oil of a clutch brake corresponding to an entire slide motion. [Figure 6] 5 is a graph for explaining the relationship between hydraulic oil pressure and time in a clutch health diagnosis. [Figure 7] 4 is a graph for explaining the relationship between hydraulic oil pressure and time in a brake health diagnosis. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0010] [Press equipment configuration] FIG. 1 is a diagram showing a device body 100 of a press device 1 according to this embodiment, and FIG. 2 is a diagram for explaining the configuration of a clutch brake 13 provided in the device body 100. As shown in FIG. 1, the press apparatus 1 according to this embodiment is a forging press apparatus that performs forging, and includes an apparatus main body 100. The apparatus main body 100 includes a bed 23, an upright 22, a crown 21, a bolster 24, a slide 18, a rotation amount measuring device 35, and a drive unit 10.

[0011] The bed 23, the upright 22, and the crown 21 constitute a frame portion of the press device 1. The bed 23, the upright 22, and the crown 21 are fastened to each other by inserting a tie rod 25a therein and tightening with a tie rod nut 25b.

[0012] The bolster 24 is fixed onto the bed 23, and a plurality of lower dies 32 are fixed to the upper portion thereof. The slide 18 is supported by a guide 19 provided on the upright 22 so as to be movable up and down. A plurality of upper dies 31 are fixed to the lower part of the slide 18. The plurality of upper dies 31 and the plurality of lower dies 32 correspond to each other in pairs, are arranged along the left and right direction of the device, and are vertically opposed to each other in pairs. When the slide 18 descends, the upper die 31 and the lower die 32 approach each other, and the workpiece is forged between them. The direction in which the slide 18 advances and retreats is not particularly limited, but in this embodiment, it advances and retreats in the vertical direction. A conveying device 40 is provided near the upper die 31 and the lower die 32. When the upper die 31 and the lower die 32 are separated from each other, the conveying device 40 conveys the molded object sequentially to the multiple sets of upper die 31 and lower die 32 arranged in a row.

[0013] The rotation amount measuring device 35 measures the amount of rotation (rotation angle) of the eccentric shaft 16 that moves the slide 18 back and forth, and outputs the measured amount of rotation of the eccentric shaft 16 to a control device 50 (see FIG. 3) which will be described later.

[0014] The drive unit 10 is configured to move the slide 18 forward and backward, and is configured with a motor 11, a flywheel 12, a clutch brake 13, a transmission shaft 14, a reducer 15, an eccentric shaft 16, and a connecting rod (connecting rod) 17. Of these, the transmission shaft 14 and the eccentric shaft 16 correspond to an example of a rotating shaft according to the present invention.

[0015] The motor 11 is fixed to a frame portion such as a crown 21. The power of the motor 11 is transmitted to the flywheel 12 via a belt 11a, causing the flywheel 12 to rotate. The flywheel 12 is rotatably supported and stores rotational energy. The transmission shaft 14 transmits the rotational motion of the flywheel 12 to a reducer 15 . The reducer 15 reduces the speed of the rotational motion of the transmission shaft 14 and transmits it to the eccentric shaft 16 . The eccentric shaft 16 has a main shaft portion 16a rotatably supported by a frame portion such as the crown 21 or the upright 22 via a bearing 41. The eccentric shaft 16 has a hollow portion that passes through along the central axis of rotation, and the transmission shaft 14 is disposed within this hollow portion so as to be rotatable relative to the eccentric shaft 16. The connecting rod 17 connects the eccentric shaft 16 and the slide 18 , converts the rotational motion of the eccentric shaft 16 into linear motion, and transmits it to the slide 18 .

[0016] The clutch brake 13 is disposed on one side of the axial direction of the transmission shaft 14, and drives and brakes the rotation of the transmission shaft 14 (i.e., the eccentric shaft 16). Specifically, as shown in FIG. 2, the clutch brake 13 of this embodiment is of a separate type that includes a clutch 131 and a brake 132 that operate independently.

[0017] The clutch 131 can connect and disconnect the flywheel 12 to an input shaft 133 fixed to the transmission shaft 14, and has the function of switching between connecting and disconnecting the power from the flywheel 12 to the transmission shaft 14 (eccentric shaft 16). This clutch 131 is a so-called wet clutch and includes an outer hub 131a that is connected to the flywheel 12 and rotates in conjunction with it, an inner hub 131b that is fixed to the input shaft 133 and rotates in conjunction with it, a disc group 131c in which multiple clutch discs Dc1 that interlocks with the outer hub 131a and clutch discs Dc2 that interlock with the inner hub 131b are arranged alternately on top of each other, and a piston 131d.

[0018] The inner hub 131b has a hydraulic path formed therein for supplying hydraulic oil (hydraulic fluid) via the input shaft 133 to the piston 131d side and the disc group 131c side. A rotary joint 134 for circulating hydraulic oil to the clutch 131 and the brake 132 is provided at the tip of the input shaft 133. The rotary joint 134 is rotatably supported at the tip of the input shaft 133, and is connected to a hydraulic oil pipe 46 of the hydraulic device 45. The pipe 46 includes an oil supply passage 46a that supplies hydraulic oil from the hydraulic device 45 to the clutch brake 13, and an oil return passage 46b that returns hydraulic oil from the clutch brake 13 to the hydraulic device 45. Even when the input shaft 133 is rotating relative to the rotary joint 134, hydraulic oil can be mutually circulated between the pipe 46 of the hydraulic device 45 and the hydraulic path provided in the input shaft 133. The piston 131d is normally pressurized by a (brake) spring in a direction away from the disk group 131c. When hydraulic oil is supplied to the piston 131d side through the inner hub 131b, the piston 131d moves against the spring pressure in a direction compressing the disk group 131c. When the disk group 131c is compressed by the piston 131d, the clutch disks Dc1 and Dc2 are in frictional contact with each other, and the outer hub 131a and the inner hub 131b are connected to each other, resulting in a connected state in which power can be transmitted from the flywheel 12 to the input shaft 133 (transmission shaft 14). In this connected state, the rotational motion of the flywheel 12 is transmitted in this order to the transmission shaft 14, the reducer 15, and the eccentric shaft 16, and then converted into a translational motion of the slide 18 via the connecting rod 17, causing the slide 18 to move up and down (see FIG. 1). When the oil on the pressure-receiving side of the piston 131d is released, the piston 131d is pushed back by the spring, and the clutch discs Dc1, Dc2 are separated from each other. Then, the connection between the outer hub 131a and the inner hub 131b is released, and the power transmission from the flywheel 12 to the input shaft 133 is cut off.

[0019] The brake 132 has a function of braking the rotation of the transmission shaft 14 (eccentric shaft 16). This brake 132 is a so-called wet brake and includes an outer hub 132a fixed to a unit cover 135, an inner hub 132b fixed to the input shaft 133 and rotating in conjunction with it, a disc group 132c in which multiple brake discs Db1 linked to the outer hub 132a and brake discs Db2 linked to the inner hub 132b are arranged alternately on top of each other, and a piston 132d.

[0020] The inner hub 132b has a hydraulic path formed therein for supplying hydraulic oil to the piston 132d side via the input shaft 133. The piston 132d is normally pressurized by a spring (not shown) in a direction in which it presses against the disk group 132c, whereby the disk group 132c is compressed by the piston 132d, the brake disks Db1 and Db2 are in frictional contact with each other, the outer hub 132a and the inner hub 132b are connected, and the input shaft 133 is in a braking state. When hydraulic oil is supplied to the piston 132d through the inner hub 132b, the piston 132d moves in a direction away from the disc group 132c against the spring pressure. This pushes the piston 132d back, and the brake discs Db1, Db2 are separated from each other. Then, the connection between the outer hub 132a and the inner hub 132b is released, and the input shaft 133 is released from the braking state.

[0021] By applying a wet configuration to the clutch 131 and the brake 132, high cooling performance of the disk group can be obtained. Due to the high cooling performance, a high torque capacity can be obtained in both the clutch function and the brake function, compared to a dry configuration of a comparable size. Therefore, the wet configuration can reduce the size and weight of the clutch 131 and the brake 132 while realizing the required torque capacity. Furthermore, the wet configuration allows the clutch 131 and the brake 132 to be disposed in a sealed space, so that they are not affected by dust generated by forging, and therefore high clean performance can be obtained, and in addition, vibration and noise can be reduced.

[0022] FIG. 3 is a block diagram showing a schematic control configuration of the press apparatus 1. As shown in this figure, the press device 1 includes, in addition to a device main body 100, a hydraulic device 45 and a control device 50.

[0023] As described above, the hydraulic device 45 is for supplying hydraulic oil to the clutch brake 13. The hydraulic device 45 includes a hydraulic pump 451 that applies pressure to the hydraulic oil, at least one servo valve 452 that is disposed in a fluid path between the hydraulic pump 451 and the clutch brake 13 and controls the supply of the hydraulic oil, and a pressure gauge 455. The hydraulic device 45 supplies hydraulic oil stored in a tank 450 to the clutch brake 13 at a predetermined pressure by driving a hydraulic pump 451 and a servo valve 452, and discharges (returns) the hydraulic oil from the clutch brake 13 to the tank 450. The pressure gauge 455 detects (measures) the pressure of the hydraulic oil supplied to the clutch brake 13, and outputs it to the control device 50. The pressure gauge 455 may be disposed inside the device main body 100. The hydraulic device 45 also includes a first thermometer 456 and a second thermometer 457 that detect (measure) the temperature of the hydraulic oil and output it to the control device 50 (see FIG. 2). The first thermometer 456 detects the temperature of the hydraulic oil in the tank 450. The second thermometer 457 detects the temperature of the hydraulic oil discharged (returned oil) from the clutch brake 13 to the tank 450.

[0024] The control device 50 includes a display unit 51, a memory unit 52, and a control unit 53. Of these, the display unit 51 is, for example, a liquid crystal display or the like, and displays various information based on a display signal input from the control unit 53. The display unit 51 may include a speaker capable of audio display (output).

[0025] The storage unit 52 is a memory configured by, for example, a RAM (Random Access Memory) or a ROM (Read Only Memory), and stores various programs and data, and also functions as a work area for the control unit 53. The storage unit 52 of this embodiment stores in advance a health diagnosis program 521 for executing a health diagnosis process (see FIG. 4) described later.

[0026] The control unit 53 is configured with, for example, a CPU (Central Processing Unit) and the like, and performs integrated control of each part of the press apparatus 1. Specifically, the control unit 53 controls the operation of the motor 11 and the transport device 40, drives the hydraulic device 45 to operate the clutch brake 13, and diagnoses the soundness of the clutch brake 13 based on the output of the pressure gauge 455, etc.

[0027] [Health diagnostic process] Next, a health diagnosis process for diagnosing the health of the clutch brake 13 will be described. Fig. 4 is a flow chart showing the flow of the health diagnosis process, and Fig. 5 is a graph showing an example of a change in hydraulic oil pressure of the clutch brake 13 corresponding to the entire slide motion. Fig. 6 is a graph for explaining the relationship between hydraulic oil pressure and time in the health diagnosis of the clutch 13 in steps S3 and S4 of the health diagnosis process. Fig. 7 is a graph for explaining the relationship between hydraulic oil pressure and time in the brake health diagnosis in step S5 of the health diagnosis process.

[0028] The soundness diagnosis process is a process for diagnosing the soundness of the clutch brake (C / B) 13 during operation of the apparatus main body 100. In this embodiment, "diagnosing the soundness" of the clutch brake 13 includes determining the need for maintenance by detecting a sign of an abnormality in the clutch brake 13 before the abnormality occurs. This soundness diagnosis process is executed by the control unit 53 reading out and deploying the soundness diagnosis program 521 from the memory unit 52 when the press apparatus 1 starts operating, for example.

[0029] As shown in FIG. 4, first, the control unit 53 starts the operation of the device main body 100 (step S1). Specifically, in this operation, before the press processing, the control unit 53 drives and rotates the flywheel 12 in a state in which the flywheel 12 and the reducer 15 are disconnected by the clutch brake 13. When the press processing is started in this state, the control unit 53 drives the clutch brake 13 according to the position of the slide 18 so as to realize a preset slide motion. When the slide 18 makes one reciprocating movement with a predetermined slide motion, the material is press-processed between the upper die 31 and the lower die 32, and then the slide 18 rises and the upper die 31 and the lower die 32 are released, completing one press processing operation.

[0030] In the above press working process, the control unit 53 drives the clutch brake 13 in four stages by appropriately switching the opening of the servo valve 452 of the hydraulic device 45. The four stages of driving include soft clutch, full clutch, soft brake, and full brake driving, in that order, as shown in FIG. The full clutch drive is a drive in which the pressure of the pistons 131d, 132d of the clutch brake 13 (i.e., the pressure of the hydraulic oil) becomes the highest first pressure (full clutch pressure Pfc). By driving the full clutch, a large torque can be transmitted from the flywheel 12 to the reducer 15, and the maximum load of the device body 100 can be applied to the slide 18. Soft clutch driving is a driving in which the pressure of the hydraulic oil in the clutch brake 13 becomes a second pressure (soft clutch pressure Psc) that is lower than the first pressure, and the slide 18 can be accelerated when no large load is applied to the slide 18. The soft brake drive is a drive in which the pressure of the hydraulic oil of the clutch brake 13 becomes a third pressure (soft brake pressure Psb) which is smaller than the spring force, and the slide 18 can be decelerated with less impact. The full brake drive is a drive in which the pressure of the hydraulic oil in the clutch brake 13 is released, and the maximum braking force can be applied to the slide 18.

[0031] At this time, the control unit 53 outputs four-stage pressure command values ​​corresponding to each drive state to the drive circuit of the hydraulic device 45, so that the drive circuit performs feedback control or feedforward control based on the actual measured value of the hydraulic oil to drive the servo valve 452. This realizes four-stage drive of the clutch brake 13. However, the change in the pressure command value and the change in the pressure (actual measured value) of the hydraulic oil do not completely match, and the pressure of the hydraulic oil follows the pressure command value with a predetermined time lag or a predetermined pressure change.

[0032] Next, as shown in FIG. 4, the control unit 53 determines whether the device main body 100 is in a stable operating state (step S2). The term "stable operating state" refers to a state in which the operation of the slide 18 is stable, or more precisely, a state in which the mechanical load in the pressing direction acting on the slide 18 is stable within a predetermined range. In this step, the control unit 53 determines that the apparatus main body 100 is in a stable operating state when at least one of the following conditions A to C is met. · Condition A: The hydraulic system temperature reaches a specified temperature. Condition B: A predetermined number of shots are fired from the start of operation. · Condition C: A specific amount of time has elapsed since the start of operation. Here, the temperature of the hydraulic system includes, for example, the temperature of the hydraulic oil in the tank 450 detected by the first thermometer 456 and the temperature of the hydraulic oil returned from the clutch brake 13 detected by the second thermometer 457. If it is determined that the operation is not stable (step S2; No), the control unit 53 repeats step S2.

[0033] On the other hand, if it is determined in step S2 that the device main body 100 is in a stable operating state (step S2; Yes), the control unit 53 determines whether the clutch operation is normal or not based on the pressure of the hydraulic oil during the soft clutch (step S3). Specifically, as shown in Fig. 6, the control unit 53 measures a time Tc1 from the pressure command output of the soft clutch until the pressure of the hydraulic oil (actual measured value) exceeds the pressure command value (soft clutch pressure Psc) for the first time. The pressure of the hydraulic oil is detected by the pressure gauge 455. Then, the control unit 53 determines that the clutch operation is sound when the time Tc1 is equal to or less than a predetermined first threshold value, and determines that the clutch operation is not sound when the time Tc1 is greater than the first threshold value. The first threshold value is set based on data from an actual machine, for example, by acquiring in advance the relationship between the amount of wear of the lining of the clutch 131 and the change in pressure of the hydraulic oil.

[0034] Next, the control unit 53 determines whether or not the clutch operation is normal based on the (elapsed) time during the soft clutch (step S4). Specifically, the control unit 53 measures the pressure of the hydraulic oil (clutch pressure Pc2) after a predetermined time Tc2 has elapsed since the soft clutch pressure command output using the pressure gauge 455. Then, the control unit 53 determines that the clutch operation is sound when the clutch pressure Pc2 is greater than a predetermined second threshold value, and determines that the clutch operation is not sound when the clutch pressure Pc2 is less than the second threshold value. The second threshold value is set based on data from an actual machine, for example, by acquiring in advance the relationship between the amount of wear of the lining of the clutch 131 and the change in the pressure of the hydraulic oil. The set value of the predetermined time Tc2 is not particularly limited, but it is preferable to set it within a period before the hydraulic oil pressure (actual measured value) reaches the soft clutch pressure Psc and during which the pressure changes relatively slowly over time, i.e., while the piston 131d is moving and the spring is being compressed.

[0035] Next, the control unit 53 determines whether or not the braking operation is normal based on the pressure of the hydraulic oil during soft braking (step S5). Specifically, as shown in Fig. 7, the control unit 53 measures a time Tb1 from the soft brake pressure command output to the time when the hydraulic oil pressure (actual measurement value) first falls below the pressure command value (soft brake pressure Psb). The hydraulic oil pressure is detected by the pressure gauge 455. Then, the control unit 53 determines that the brake operation is sound when the time Tb1 is equal to or less than a predetermined third threshold value, and determines that the brake operation is not sound when the time Tb1 is greater than the third threshold value. The third threshold value is set based on data from an actual machine, for example, by acquiring in advance the relationship between the amount of wear of the lining of the brake 132 and the change in hydraulic oil pressure. The order of execution of steps S3 to S5 is not particularly limited, and it is sufficient that at least one of steps S3 to S5 is executed.

[0036] Next, the control unit 53 determines whether or not the clutch operation or the brake operation has been determined to be normal in all of steps S3 to S5 (step S6). Then, when it is determined in all of steps S3 to S5 that the clutch operation or the brake operation is normal (step S6; Yes), the control unit 53 shifts the process to step S8 described later.

[0037] On the other hand, in step S6, if it is determined that the clutch operation or the brake operation is not normal in at least one of steps S3 to S5 (step S6; No), the control unit 53 notifies that maintenance is required for the clutch 131 or the brake 132 (step S7). The manner of notification at this time is not particularly limited, and for example, a warning display may be simply output on the display unit 51, or the strength of the warning may be changed depending on the degree of difference between the actual measurement value and the threshold value. In addition, the device main body 100 may be stopped in conjunction with the notification of the need for maintenance.

[0038] Next, the control unit 53 determines whether or not to terminate the health diagnosis process (step S8), and if it determines not to terminate the process (step S8; No), it transitions to the above-mentioned step S2 and continues the health diagnosis. Then, when it is determined that the health diagnostic process should be ended due to, for example, the end of operation of the apparatus main body 100 (step S8; Yes), the control unit 53 ends the health diagnostic process.

[0039] [Technical effect of the present embodiment] As described above, according to this embodiment, it is determined whether the operation of the slide 18 is in a stable operating state based on at least one of the temperature of the hydraulic oil, the number of shots of the pressing operation of the slide 18, and the operation time. Then, if the operation is in a stable operating state, the soundness of the clutch 131 or the brake 132 is diagnosed based on the pressure of the hydraulic oil of the clutch brake 13. This makes it possible to diagnose the soundness of the clutch 131 or the brake 132 without using the slip angle, which has problems such as being difficult to measure accurately, unlike the conventional method. Therefore, the soundness of the clutch 131 or the brake 132 can be suitably diagnosed.

[0040] Furthermore, according to this embodiment, the soundness of the clutch 131 is diagnosed based on the time Tc1 from the output of a pressure command for the soft clutch to the time when the pressure of the hydraulic oil exceeds the soft clutch pressure Psc for the first time. This makes it possible to suitably diagnose the health of the clutch 131.

[0041] Furthermore, according to this embodiment, the soundness of the clutch 131 is diagnosed based on the pressure Pc2 of the hydraulic oil after a predetermined time Tc2 has elapsed since the pressure command output for the soft clutch. This makes it possible to suitably diagnose the health of the clutch 131. In the health diagnosis of the clutch 131 based on the above-mentioned time Tc1, the pressure of the hydraulic oil after the piston 131d compresses and overcomes the (brake) spring is also included in the pressure of the hydraulic oil. Therefore, the health diagnosis of the clutch 131 based on the hydraulic oil pressure Pc2 after the time Tc2 has fewer error (variation) factors than the one based on the above-mentioned time Tc1.

[0042] Furthermore, according to this embodiment, the soundness of the brake 132 is diagnosed based on the time Tb1 from the output of the soft brake pressure command to the time when the pressure of the hydraulic oil falls below the soft brake pressure Psb for the first time. This makes it possible to suitably diagnose the soundness of the brake 132.

[0043] [others] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, the pressure of the hydraulic oil in the clutch brake 13 is detected, and the soundness diagnosis of the clutch brake 13 is performed based on the pressure value. However, the parameter used for this soundness diagnosis may be any parameter related to the pressure of the hydraulic oil in the clutch brake 13.

[0044] In addition, in the above embodiment, the clutch brake 13 is a separate type having a clutch 131 and a brake 132 that operate separately, but it may also be a combination type in which the clutch and brake are linked to each other. In the above embodiment, abnormality determination is performed for the clutch / brake 13, but abnormality determination may be performed for either the clutch or the brake. Furthermore, it is sufficient for the press apparatus according to the present invention to be equipped with at least either the clutch or the brake.

[0045] In addition, the details shown in the above embodiment can be modified as appropriate without departing from the spirit of the invention. [Explanation of symbols]

[0046] 1 Press equipment 13 Clutch brake 14 Transmission shaft (rotating shaft) 16 Eccentric shaft (rotating shaft) 18 Slides 45 Hydraulic system 50 Control device 52 Storage section 53 Control unit (judgment unit, diagnosis unit, diagnosis device) 100 Device body 131 Clutch 132 Brake 451 Hydraulic Pump 452 Servo Valve 455 Pressure gauge (detection part) 456 1st thermometer 457 2nd thermometer 521 Health Diagnostic Program Pc2 clutch pressure Pfc Full clutch pressure Psb Soft Brake Pressure Psc soft clutch pressure Tb1 hours Tc1 time Tc2 Time

Claims

1. A rotation shaft that moves the slide forward and backward in the pressing direction as it rotates; a clutch or brake for rotating or braking the rotating shaft; A detection unit that detects the pressure of the hydraulic fluid of the clutch or brake; a determination unit that determines whether or not the operation of the slide is in a stable operation state based on at least one of the temperature of the hydraulic fluid, the number of shots in the pressing operation of the slide, and an operation time; a diagnosis unit that diagnoses the soundness of the clutch or brake based on the pressure of the hydraulic fluid when the stable operating state is reached; A press device comprising:

2. The clutch actuation includes a full clutch actuated by hydraulic fluid having a first pressure, which is the highest, and a soft clutch actuated by hydraulic fluid having a second pressure, which is lower than the first pressure, The diagnosis unit diagnoses the soundness of the clutch based on a time from a pressure command output of the soft clutch to a time when the pressure of the hydraulic fluid first exceeds the second pressure. The press device according to claim 1 .

3. The clutch actuation includes a full clutch actuated by hydraulic fluid having a first pressure, which is the highest, and a soft clutch actuated by hydraulic fluid having a second pressure, which is lower than the first pressure, The diagnosing unit diagnoses the soundness of the clutch based on a pressure of the hydraulic fluid a predetermined time after a pressure command output of the soft clutch. The press device according to claim 1 .

4. The actuation of the brake includes a soft brake actuated by a hydraulic fluid at a third predetermined pressure, The diagnosis unit diagnoses the soundness of the brake based on a time from a pressure command output of the soft brake to a time when the pressure of the hydraulic fluid first falls below the third pressure. The press device according to claim 1 .

5. The clutch or brake is of a wet type. The press device according to claim 1 .

6. A diagnostic device for diagnosing a press apparatus including a rotating shaft that moves a slide forward and backward in a press direction as the rotating shaft rotates, a clutch or a brake that rotates or brakes the rotating shaft, and a detection unit that detects a pressure of a hydraulic fluid of the clutch or the brake, a determination unit that determines whether or not the operation of the slide is in a stable operation state based on at least one of the temperature of the hydraulic fluid, the number of shots in the pressing operation of the slide, and an operation time; a diagnosis unit that diagnoses the soundness of the clutch or brake based on the pressure of the hydraulic fluid when the stable operating state is reached; A diagnostic device comprising:

7. A method for diagnosing the health of a press apparatus comprising: a rotating shaft that moves a slide forward and backward in a press direction as the rotating shaft rotates; a clutch or brake that rotates or brakes the rotating shaft; and a detection unit that detects a pressure of hydraulic fluid for the clutch or brake, A control unit of the press device a determining step of determining whether or not the operation of the slide is in a stable operating state based on at least one of the temperature of the hydraulic fluid, the number of shots in the pressing operation of the slide, and an operating time; a diagnosis step of diagnosing the soundness of the clutch or brake based on a pressure of the hydraulic fluid when the stable operating state is reached; Execute A method for diagnosing the health of a press device.

8. A soundness diagnosis program for a press apparatus including a rotating shaft that moves a slide forward and backward in a press direction as the rotating shaft rotates, a clutch or a brake that rotates or brakes the rotating shaft, and a detection unit that detects a pressure of a hydraulic fluid of the clutch or the brake, Computer, a determining means for determining whether or not the operation of the slide is in a stable operating state based on at least one of the temperature of the hydraulic fluid, the number of shots in the pressing operation of the slide, and an operating time; a diagnostic means for diagnosing the soundness of the clutch or brake based on the pressure of the hydraulic fluid when the stable operating state is reached; To function as A program for diagnosing the health of press equipment.

Images