JP5915185B2 - Sliding resistance management device, sliding resistance management system, and sliding resistance management method - Google Patents

Description

The present invention relates to a sliding resistance management device, a sliding resistance management system, and a sliding resistance management method for managing sliding resistance between a guide post and a bush in a die set of a press working device.

2. Description of the Related Art Conventionally, a press working apparatus enables press working with high straightness between an upper die (punch plate) and a lower die (die plate) by providing a guide post for guiding a die set in the vertical direction (for example, Patent Document 1). In general, in a press working apparatus provided with such a guide post, a bush that slides with respect to the guide post is provided in a guide hole through which the guide post is inserted.

Japanese Patent Laying-Open No. 2005-081422

By the way, as in the press processing apparatus described in Patent Document 1, a press processing apparatus in which a die set is supported on a U-shaped support arm has a support arm that is caused by a reaction force of the press pressure during repeated press processing. A slight deflection occurs. For this reason, since the guide post slides while twisting with respect to the guide hole at the time of pressing, wear occurs between the guide post and the bush, and the straightness between the upper die and the lower die is lowered. Therefore, such a press working apparatus requires periodic maintenance such as replacement of guide posts and bushes.
As a method for determining whether or not to perform maintenance on the guide post and the bush, it is conceivable to determine the maintenance timing based on the number of times of press working (up and down movement of the die set). However, the increase in the sliding resistance between the guide post and the bush due to the twisting or wear of the guide post and the bush varies depending on the machine difference of the press working apparatus.
Therefore, according to the above method, the maintenance time of the guide post and the bush cannot be appropriately determined according to the machine difference.

In view of the above-described points, the present invention provides a sliding resistance management device and a sliding management system capable of appropriately managing the sliding resistance between the guide post and the bush according to the machine difference of the press working device. It is an object to provide a sliding management method.

The sliding resistance management device of the present invention is a sliding resistance management device that manages the sliding resistance between the guide post and the bush in the die set of the press working device, and the press working device moves the die set in the pressing direction. A driving torque value of a power source that has a Z-axis moving mechanism to move, and that applies a press pressure to the die set based on motion data consisting of a speed signal indicating the moving speed of the Z-axis moving mechanism and a position signal indicating the slide position a torque obtaining section for acquiring, based on the obtained driving torque value, and a sliding resistance management unit for managing the sliding resistance between the guide post and the bushing, the sliding resistance management unit acquires A maintenance necessity determination unit that determines whether or not the guide post and the bush need to be maintained based on the drive torque value. The maintenance necessity determination unit If the number of shots reaches a predetermined number, characterized by determining the necessity of guide posts and bushings maintenance.

The sliding management method of the present invention is a sliding resistance management method for managing sliding resistance between a guide post and a bush in a die set of a press working apparatus, and the press working apparatus moves the die set in the pressing direction. The drive torque value of the power source that applies the press pressure to the die set is determined based on the motion data including the speed signal indicating the moving speed of the Z-axis moving mechanism and the position signal indicating the slide position. and the torque value acquisition step of acquiring, based on the obtained driving torque value, the sliding resistance management steps, comprising a sliding resistance management unit step of managing the sliding resistance between the guide post and the bushing, acquires A maintenance necessity determination step for determining whether or not the guide post and the bush need to be maintained based on the driven torque value. Determination step, when the number of shots die set reaches a predetermined number, characterized by determining the necessity of guide posts and bushings maintenance.

The drive torque value of the power source is controlled by feedback control based on motion data in order to apply a constant press pressure to the die set. This driving torque value includes a driving torque value necessary for press working and a driving torque value corresponding to a loss due to sliding resistance between the guide post and the bush. According to the above configuration, the sliding resistance between the guide post and the bush is managed based on the driving torque value. Management of dynamic resistance can be performed. For example, when an excessive driving torque value is acquired during operation, it is determined that the sliding resistance between the guide post and the bush is increased, and appropriate measures can be taken.

In this case, the sliding resistance management unit, based on the obtained driving torque value, have a determining maintenance necessity determining unit necessity of guide posts and bushings maintenance, maintenance necessity determination step, the die set When the number of shots reaches a predetermined number, it is preferable to determine whether the guide post and the bush need to be maintained .

According to this configuration, it is possible to appropriately determine whether or not the guide post and the bush need to be maintained depending on the machine difference of the press working apparatus and changes with time such as wear with time. In addition,
The maintenance necessity determination unit desirably determines that “maintenance is necessary” when the acquired drive torque value exceeds a predetermined threshold. In addition, the maintenance necessity determination unit, when the drive torque value exceeds a predetermined threshold for a predetermined number of times in a continuous predetermined number of press work,
It is desirable to determine that “maintenance is required”. According to this, for example, press working on a series of workpieces constituted by a predetermined number of punchings is not interrupted by determining whether maintenance is required for the guide posts and bushes.

In this case, it is preferable that the torque value acquisition unit acquires a peak value in the drive torque value, and the maintenance necessity determination unit determines whether the guide post and the bush need to be maintained based on the acquired peak value.

According to this configuration, when the reaction force due to punching reaches a peak, the sliding resistance between the guide post and the bush also peaks. Therefore, based on the highest drive torque value,
By determining whether or not maintenance is necessary, it is possible to appropriately determine the maintenance timing.

In this case, it is preferable to further include a notification unit that notifies the user of the determination result of the maintenance necessity determination unit.

According to this configuration, it is possible to present to the user an appropriate maintenance timing corresponding to a change with time, such as a machine difference of the press working device and a time-dependent wear.

The sliding management device may further include a control unit that controls the drive source based on the motion data, and the torque value acquisition unit may acquire a torque command value to the drive source of the control unit as a drive torque value. preferable.

According to this configuration, since the sliding resistance can be managed based on the torque command value from the control unit, various kinds of fed back data are not necessary, and the calculation processing amount of the sliding resistance management unit is reduced. Can do.

The sliding management system according to the present invention includes a press working device and the sliding resistance management device.

According to this configuration, there is provided a sliding management system capable of appropriately managing the sliding resistance between the guide post and the bush in accordance with the change over time such as the machine difference of the press working device and the wear over time. be able to.

It is a side view of the press work apparatus concerning one Embodiment of this invention. It is sectional drawing of the die set in a press work apparatus. It is the model top view which showed arrangement | positioning of the guide post and guide bush of a die set. It is the block diagram which showed the control structure of the press work apparatus. It is the figure which showed the relationship between the slide position and time in a press work process. It is a flowchart which shows the press work process of a press work apparatus. It is a flowchart which shows the maintenance necessity determination process of a press work apparatus. It is the block diagram which showed the control structure of the press work apparatus concerning other embodiment of this invention.

Hereinafter, a press working apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings. This press working apparatus is an apparatus for forming a desired through hole by performing punching (punching) on a workpiece W that is a workpiece by a die set having a punch. As shown in FIG. 1, a press working apparatus P1 according to this embodiment includes a base 1 fixed to a floor, a die set 2 fixed on the base 1, and a die set 2 in the Z-axis direction. A Z-axis moving mechanism 3 that slides, a support portion 4 that supports the Z-axis moving mechanism 3, and a work decharging device 5 that discharges the work W to the die set 2 are provided.

The die set 2 includes a punch holder 21 and a die holder 22 that face each other, and a punch holder 21 that slides in the Z-axis direction with straightness with respect to the fixed die holder 22.
And a guide post (outer guide post 23) that guides the operation. The upper surface of the punch holder 21 is fixed to the lower end of the upper mounting base 6 fixed to the lower end of a die set support portion 33 described later. On the other hand, the die holder 22 is fixed to the upper surface of the lower mounting base 7 fixed to the upper surface of the base 1.

The Z-axis moving mechanism 3 includes a servo motor 31 serving as a driving source for Z-axis movement, and a servo motor 3
1 is coupled to a main shaft cylinder 32 having a conversion mechanism (for example, a lead screw mechanism using a ball screw) for converting the rotation operation of 1 into a vertical movement in the Z-axis direction, and an operation arm (not shown). And a die set support portion 33 that supports the die set 2 so as to be movable in the Z-axis direction via the upper mounting base 6. The Z-axis moving mechanism 3 moves the operating arm up and down in the Z-axis direction by forward and reverse rotation of the servo motor 31, and the die set 2 (mainly the punch holder 21, mainly through the die set support portion 33 and the upper mounting base 6. The punch plate 212 and the stripper plate 214 (see FIG. 2) are slid in the Z-axis direction. The servo motor 31 is connected to a control device 62 (see FIG. 4) that performs overall control of the press working device P1, and its drive is controlled. The press working apparatus P1 punches a plurality of locations by punching an unprocessed work W by punching a predetermined number of shots by driving a Z-axis moving mechanism 3 and a work erasing apparatus 5 described later.

Further, the press working apparatus P1 includes a speed sensor 34 configured by an encoder or the like that detects the rotation of the servo motor 31 and a linear scale 35 that detects the slide position of the Z-axis moving mechanism 3. The speed signal of the speed sensor 34 indicating the moving speed of the Z-axis moving mechanism 3 and the position signal indicating the slide position of the Z-axis moving mechanism 3 are input to the motion controller 64 (see FIG. 4), and the servo motor based on the motion data. 31 is used for feedback control. The motion data indicates a speed signal and a position signal input to the motion controller 64.

The support unit 4 supports the arm base 41 fixed on the upper surface of the base 1, the support arm 42 fixed on the arm base 41, and the spindle cylinder 32 of the Z-axis moving mechanism 3 on the side surface of the support arm 42. A main shaft support portion 43. That is, the support means including the base 1 and the support portion 4 of the press working apparatus P1 has a U-shape in which one side of the rectangle is lost. With the above configuration,
In the punching process of the workpiece W, if the vertical movement of the Z-axis moving mechanism 3 is repeated, the reaction force of the press pressure applied from the Z-axis moving mechanism 3 to the die set 2 acts, so that one side of the lost rectangle opens. In addition, the U-shaped support means is slightly distorted. Since the die set 2 is distorted by the distortion of the support means and the punch holder 21 cannot slide with a high straightness with respect to the die holder 22, the press apparatus P1 is used to perform maintenance of the die set 2. A function for determining whether maintenance is necessary is provided (details will be described later).

On the other hand, the workpiece discharge device 5 is for discharging the workpiece W to the die set 2, and is fixed to the upper surface of the same base 1 as the die set 2 and the support portion 4. The workpiece desorbing device 5 places an X-axis stage 51 that moves the workpiece W in the X-axis direction, a Y-axis stage 52 that moves the workpiece W in the Y-axis direction, and a workpiece W placed on the die set 2. The work support arm 53 is provided. The workpiece discharger 5 includes an X-axis stage 51 and a Y-axis stage 5
2 is driven to place (set) an unprocessed workpiece W at a predetermined position of the die set 2, and the workpiece W is moved at a predetermined pitch in accordance with the press operation, and the processed workpiece W is removed. Material. Although not shown in FIG. 4, the workpiece discharger 5 is connected to the controller 62 and its drive is controlled.

Next, the die set 2 according to the present embodiment will be described in detail with reference to FIG. As shown, the die set 2 includes a punch holder 21 fixed to the lower end of the upper mounting base 6,
A die holder 22 fixed to the upper surface of the lower mounting base 7. Die holder 22
The outer guide post 23 is erected, and the punch holder 21 is provided with an outer guide hole 24 through which the upper end of the outer guide post 23 is inserted. An outer guide bush 25 that slides with the outer peripheral surface of the outer guide post 23 is provided on the inner peripheral surface of the outer guide hole 24. Further, the cylindrical outer guide bush 25 guides the operation of the outer guide post 23 that passes through the punch holder 21 upward and slides relative to the punch holder 21 and has a protective function such as prevention of bending. doing.

A punch plate 212 is attached to the lower surface of the punch holder 21 via a first backing plate 211. On the other hand, the die plate 215 is fixed to the die holder 22 via the third backing plate 216 so as to face the punch plate 212.
Further, a stripper plate 214 is suspended from the punch plate 212 via the second backing plate 213 by a plurality of biasing fixing means 221 between the punch plate 212 and the die plate 215 facing each other. The punch plate 212, the stripper plate 214, the die plate 215, and the first backing plate 211, the second backing plate 213, and the third backing plate 216 associated therewith are:
A plate having a similar relation and a small area with respect to the punch holder 21 and the die holder 22 and arranged concentrically inside the plurality of outer guide posts 23.

The punch plate 212 includes a punch 222 and the like for punching the workpiece W, and the first backing plate 211 has a backup function such as the punch 222 for punching. The stripper plate 214 is an insert type plate in which the stripper nesting part 214a is incorporated, and the second backing plate 213 has a backup function of the stripper nesting part 214a. Similarly, the die plate 215 is an insert-type plate incorporating the die insert part 215a, and the third backing plate 216 has a backup function of the die insert part 215a. That is,
The die set according to this embodiment has a laminated structure including eight layers of plates. In addition,
The plate configuration of the die set 2 is arbitrary.

The urging / fixing means 221 for suspending the stripper plate 214 is not shown in detail, but a screw for fixing the stripper plate 214 via the second packing plate 213 and an upper surface of the screw, which are fixed from above to below. And an energizing spring. When the punch holder 21 is lowered by driving the Z-axis moving mechanism 3, the stripper plate 214 is moved.
Reaches the upper surface of the die plate 215, and the biasing fixing means 221 expands and contracts. In other words, the stripper plate 214 is supported by the urging and fixing means 221 so as to be movable up and down while being suspended from the punch plate 212.

The punch plate 212 is a punch 22 for punching a workpiece W.
2 is provided. The punch 222 is inserted through a punch hole 223 a penetrating the second backing plate 213 and the stripper plate 214, and the spring of the biasing fixing means 221 is positioned in the same plane as the lower surface of the stripper plate 214 in the natural state. doing. Further, a punch hole 223b penetrating the third backing plate 216 and the die plate 215 is provided, and a lower end portion of the punch 222 protruding from the lower surface of the stripper plate 214 when the punch holder 21 is lowered by driving the Z-axis moving mechanism 3. However, it is the structure penetrated by the punch hole 223b. Thereby, the punch 222 is pierced with respect to the workpiece | work W, and punching is performed.

Further, the punch plate 212 and the die plate 21 are disposed outside the bias fixing means 221.
An inner guide post 224 for 5 blade alignment is provided. The inner guide post 224 is inserted through the inner guide hole 225a penetrating the second backing plate 213 and the stripper plate 214, and the lower end of the inner guide post 224 is below the lower surface of the stripper plate 214 when the spring of the biasing fixing means 221 is in a natural state. Has a protruding length. In addition, an inner guide hole 225b penetrating the third backing plate 216 and the die plate 215 is provided, and the lower end portion of the inner guide post 224 is moved to the inner guide hole by the lowering of the punch holder 21 by the drive of the Z-axis moving mechanism 3. It is configured to be inserted through 225b. An inner guide bush 226a is provided on the inner peripheral surface of the inner guide hole 225a, and an inner guide bush 22 is provided on the inner peripheral surface of the inner guide hole 225b.
6b are provided respectively. The workpiece W is on the die plate 215.
It is set inside a plurality of inner guide posts 224.

Here, the arrangement of the two types of guide posts and guide bushes provided in the die set 2 will be described with reference to FIG. The figure is a top view schematically showing the die set 2. As shown in the figure, the punch holder 21 has a rectangular shape, and a total of four outer guide holes 24 are formed at the four corners thereof. Outer guide bushes 25 are provided on the inner peripheral surfaces of the four outer guide holes 24, and four outer guide posts 23 that slide on the outer guide bushes 25 are provided. That is, a total of four outer guide posts 23 are erected at the four corners of the rectangular die holder 22.

On the other hand, a punch plate 212, a stripper plate 214, and a die plate 215 (including three backing plates) formed in a rectangular shape smaller than the punch holder 21 and the die holder 22 are disposed inside the four outer guide posts 23. Are arranged concentrically. A total of four inner guide posts 2 at the four corners of the punch plate 212
24, and inner guide holes 225a and 225b through which the inner guide posts 224 are inserted are provided at four corners of the stripper plate 214 (including the second backing plate 213) and the die plate 215 (including the third backing plate 216). Inner guide bushes 226a, 226 on which the inner guide posts 224 slide are provided on the inner peripheral surfaces of the inner guide holes 225a, 225b.

As described above, the die set 2 according to the present embodiment includes the four outer guide posts 23 for aligning the punch holder 21 and the die holder 22, and the four inner guides for aligning the punch plate 212 and the die plate 215. And a post 224. According to this, in the die set 2, the upper mold (mainly the punch holder 21, the punch holder 21 and the stripper plate 2) that is slid up and down by the Z-axis moving mechanism 3.
14) and the fixed lower mold (mainly composed of the die plate 215 and the die holder 22) are accurately aligned to prevent positional deviation between the upper mold and the lower mold. doing. However, a twist between the outer guide post 23 and the outer guide bush 25, which occurs due to a positional shift with time between the upper mold and the lower mold due to the distortion of the U-shaped support means, and Inner guide post 224 and inner guide bush 2
26, the sliding resistance between each guide post and each guide bush increases and wears, and maintenance such as replacement of parts is required periodically.

The “guide post” in the claims refers to the outer guide post 23 and the inner guide post 224, and the “bush” refers to the outer guide bush 25 and the inner guide bush 226.

Next, the control configuration of the press working apparatus P1 will be described with reference to FIG. This figure is a block diagram showing a control configuration of the press working apparatus P1 of the present embodiment. As illustrated, the press working apparatus P1 includes an input device 61, a control device 62, a notification unit 63, a motion controller 64, a servo driver 65, a servo motor 31, a speed sensor 34, and a linear scale 35.

The input device 61 includes a keyboard and various switches, and is used to input various data and to drive and stop the servo motor 31.

The control device 62 is for overall control of the press working device P1, and includes a memory 71 storing motion data (application) for driving and controlling the Z-axis moving mechanism 3 in punching (punching), and motion data. Servo driver 6 based on
5, a torque value acquisition unit 73 that acquires a torque command value sent to the servo motor 31, and a maintenance necessity determination unit 72 that determines whether or not the die set 2 needs to be maintained based on the acquired torque command value. ing. The motion data stored in the memory 71 is control data for driving the Z-axis moving mechanism 3 along a locus of a predetermined slide position in punching. Based on this motion data, the control device 62 controls the drive of the servo motor 31. Further, the maintenance necessity determination unit 72 includes the outer guide post 23 and the inner guide post 224 of the die set 2, and the outer guide bush 2.
5 and the inner guide bush 226 are determined whether or not maintenance is necessary.

The notification unit 63 is configured by, for example, an LED lamp, and lights up light of a different color depending on the determination result to notify the user of the necessity of maintenance of the die set 2. Note that the notification means 63 may be constituted by a notification means based on audio information or a notification means based on image information.

The motion controller 64 generates a drive signal for controlling the servo motor 31 based on the motion data of the control device 62, and controls the drive of the servo motor 31 in detail. The motion controller 64 includes a position control unit 83 for controlling the slide position of the Z-axis moving mechanism 3, a speed control unit 82 for controlling the moving speed of the Z-axis moving mechanism 3, and a drive torque value of the servo motor 31. A torque control unit 81 for controlling. The position controller 83 receives the position information from the linear scale 35 and uses it to generate a drive signal for controlling the servo motor 31. The speed controller 82 receives speed information from the speed sensor 34 and uses it to generate a drive signal for controlling the servo motor 31. That is, the motion controller 64 detects the operation state of the servo motor 31 with the linear scale 35 and the speed sensor 34 and uses it to generate a drive signal.
Servo motor 31 is feedback controlled.

Further, the torque control unit 81 transmits a torque command value included in the drive signal for controlling the servo motor 31 to the torque value acquisition unit 73 of the control device 62. That is, the torque value acquisition unit 73
Acquires the torque command value generated by the motion controller 64 as the drive torque value of the servo motor 31. The driving torque value includes a torque value for applying a desired press pressure to the workpiece W, the outer guide post 23 and the outer guide bush 25, and the inner guide post 224 and the inner guide bush 226. The torque value for the sliding resistance is included. Therefore, excessive torque command value (drive torque value)
Is acquired, it is considered that the torque value corresponding to the sliding resistance has increased. In the present embodiment, the torque command value for determining whether maintenance is necessary is obtained from the torque control unit 81 of the motion controller 64. However, the torque command value may be obtained from the servo driver 65.

The servo driver 65 drives the servo motor 31 based on the drive signal transmitted from the motion controller 64.

In the claims, the “control unit” refers to the control device 62, the motion controller 64, and the servo driver 65, and the “drive source” refers to the servo motor 31.
The term “sliding resistance management device” in the claims refers to the torque value acquisition unit 73, the maintenance necessity determination unit 72 (sliding resistance management unit), and the notification unit 63 (notification unit).

Here, referring to FIG. 5, the Z-axis moving mechanism 3 in the press processing of the press processing apparatus P1.
Will be described. This figure shows the relationship between the slide position and time when the Z-axis moving mechanism 3 is driven based on the motion data. The Z-axis moving mechanism 3 starts moving from the origin Z1 and moves to the top dead center Z2 where the press working process is started. Then, it continues to descend, passes through the upper surface position Z3 reaching the upper surface of the workpiece W, and the lower surface position Z4 of the workpiece W
Pass through. After that, when reaching the bottom dead center Z5, after stopping for a predetermined time, it rises toward the top dead center Z2. By such an operation, when a predetermined number of punching operations are completed, the punching process is terminated by moving to the origin Z1. In addition, the time interval (T
1 to 6) are determined based on the motion data. In addition, the torque value acquisition unit 73
The torque command value in the reciprocation between 2 and 5 is acquired.

Next, with reference to FIG. 6, the press processing method of the press processing apparatus P1 concerning this embodiment is demonstrated. This figure is a flowchart showing the press processing of the press processing apparatus P1. First, the press working apparatus P1 drives the servo motor 31 to move the Z-axis moving mechanism 3 from the origin Z1 to the top dead center Z2 (S01). Then, in a state where the Z-axis moving mechanism 3 is at the top dead center Z2, the workpiece de-energizing device 5 supplies the workpiece W to the die set 2 for positioning and setting (S02). After the workpiece W is set, the Z-axis moving mechanism 3 starts to descend from the top dead center Z2 (S03). Then, the workpiece W passes through the upper surface position Z3 and the lower surface position Z4 (S04) and reaches the bottom dead center Z5 (S05). After reaching the bottom dead center Z5, the Z-axis moving mechanism 3 is raised to the top dead center Z2 (S06). According to the flow so far, one shot of punching has been performed. Here, the press working apparatus P1 outputs the torque command values from S3 to S6 to a file (S07). That is, the torque command value when the Z-axis moving mechanism 3 reciprocates between the top dead center Z2 and the bottom dead center Z5 is output.

Subsequently, when the number of punching shots that have been applied to the workpiece W has reached a predetermined number (S08: Yes), it is determined whether or not the die set 2 needs to be maintained (S09). on the other hand,
When the number of punching shots has not reached the predetermined number (S08: No), S02 to S
The flow of 08 is repeated.

In the maintenance necessity determination in S09, if the determination result is “maintenance unnecessary” (S10: “unnecessary”), the number of workpieces W processed so far does not reach the lot end number (S11). : No), the processed workpiece W is removed, the unprocessed workpiece W is fed (S12), and the flow from S02 to S10 is repeated. On the other hand, if the number of workpieces W processed so far has reached the number of finished lots (S11: Yes), the Z-axis moving mechanism 3
Is moved to the origin Z1 (S13), and the process is terminated.

On the other hand, in the maintenance necessity determination in S09, the determination result is “maintenance required”.
(S10: “required”), the notification means 63 notifies that the outer guide post 23, the outer guide bush 25, the inner guide post 224, and the inner guide bush 226 need maintenance (S14). . Thereafter, the Z-axis moving mechanism 3
Is moved to the origin Z1 (S13), and the process is terminated.

Next, with reference to FIG. 7, the maintenance necessity determination in the press work process of FIG. 6 will be described. FIG. 9 is a flowchart showing the maintenance necessity determination process. First, the press working apparatus P1 calculates the peak value of the torque value for each file output in S07 of FIG. 6 (S21). When the calculated peak value includes a value exceeding the threshold (S22: Yes), the determination result is “maintenance required” (S23). On the other hand, when there is no value exceeding the threshold value in the calculated peak value (S22: No), the determination result is “maintenance unnecessary” (S24). Thus, since the necessity for maintenance is determined based on the maximum value of the driving torque value at which the sliding resistance between the guide post and the guide bush reaches a peak, the maintenance timing can be determined appropriately.

Here, with reference to FIG. 8, the press work apparatus P2 concerning other embodiment of this invention is demonstrated. In addition, about the structure same as said embodiment, the same code | symbol is used and detailed description is abbreviate | omitted. The figure is a block diagram showing a control configuration of the press working apparatus P2 according to the present embodiment. As illustrated, the press working apparatus P <b> 2 includes a maintenance necessity determination unit 72 in the motion controller 64. The maintenance necessity determination unit 72 directly acquires a torque command value from the torque control unit 81, and performs maintenance necessity determination based on the acquired torque command value.

According to the press working apparatuses P1 and P2 according to each of the above-described embodiments, the outer guide post 2 that is generated due to temporal distortion of the support means (mainly the support arm) that supports the Z-axis moving mechanism 3 or the like.
3 and the outer guide bush 25, and the appropriate maintenance time of the die set 2 can be determined in accordance with the increase in sliding resistance over time caused by the twisting of the inner guide post 224 and the inner guide bush 226. In addition, it is possible to determine an appropriate maintenance time in accordance with the sliding resistance that varies depending on the machine difference between the die set 2 or the press working apparatuses P1 and 2, and the amount of change in the sliding resistance.

The torque value acquisition unit 73, the maintenance necessity determination unit 72, and the notification unit 63 may be configured as devices separate from the press working device P (sliding resistance management device).

2: Die set 23: Outer guide post 25: Outer guide bush 31
: Servo motor 63: Notification means 64: Motion controller 72: Maintenance necessity determination unit 73: Torque value acquisition unit 81: Torque control unit 224: Inner guide post 226: Inner guide bush P 1 and 2: Press processing device W: Workpiece

Claims (6)

A sliding resistance management device that manages sliding resistance between a guide post and a bush in a die set of a press working device,
The press working apparatus has a Z-axis moving mechanism for moving the die set in the pressing direction,
A torque value acquisition unit that acquires a drive torque value of a power source that applies a press pressure to the die set based on motion data including a speed signal indicating a moving speed of the Z-axis moving mechanism and a position signal indicating a slide position; ,
A sliding resistance management unit that manages sliding resistance between the guide post and the bush based on the acquired driving torque value ;
The sliding resistance management unit includes a maintenance necessity determination unit that determines necessity of maintenance of the guide post and the bush based on the acquired driving torque value.
The maintenance necessity judging unit judges whether or not maintenance of the guide post and the bush is necessary when the number of shots of the die set reaches a predetermined number . The torque value acquisition unit acquires a peak value in the driving torque value,
The sliding resistance management device according to claim 1, wherein the maintenance necessity determination unit determines whether the guide post and the bush need to be maintained based on the acquired peak value. The sliding resistance management device according to claim 1, further comprising a notifying unit that notifies a user of a determination result of the maintenance necessity determining unit. A control unit for controlling the drive source based on the motion data;
The sliding resistance management device according to claim 1, wherein the torque value acquisition unit acquires a torque command value to the drive source of the control unit as the drive torque value. The press working device;
A sliding resistance management system comprising: the sliding resistance management device according to claim 1. A sliding resistance management method for managing sliding resistance between a guide post and a bush in a die set of a press working device,
The press working apparatus has a Z-axis moving mechanism for moving the die set in the pressing direction,
A torque value acquiring step for acquiring a driving torque value of a power source that applies a press pressure to the die set based on motion data including a speed signal indicating a moving speed of the Z-axis moving mechanism and a position signal indicating a slide position; ,
A sliding resistance management step for managing sliding resistance between the guide post and the bush based on the acquired driving torque value, and
The sliding resistance management unit step includes a maintenance necessity determination step for determining necessity of maintenance of the guide post and the bush based on the acquired driving torque value,
The sliding resistance management method characterized in that the maintenance necessity determination step determines whether the guide post and the bush need to be maintained when the number of shots of the die set reaches a predetermined number.

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