JP2015160215A - Press die management method and press die management device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press die management method and a press die management device capable of managing an accurate time for die polishing of each die component even when pressing is performed with a plurality of steps integrated into a single step.SOLUTION: The die management method manages a die of a press 1, which performs press working by use of a die having a plurality of components and is controlled by a program. The program has a plurality of pieces of maintenance count data for each component, and the maintenance count data includes data CXn indicating the number of times each component has been used, data CYn indicating the number of times each component is scheduled to be used, and a weight Mn corresponding to a use frequency of each component per motion. To the data CXn indicating the number of times each component has been used, the weight Mn is added for every motion, and once the data CXn reaches the data CYn indicating the number of times each component is scheduled to be used, an operator is notified thereof.

Description

  The present invention relates to a mold management method and a mold management apparatus used in a press machine.

  In recent years, press equipment such as a turret punch press and a servo press has been widely used in the technical field of sheet metal processing. In these press machines, many dies are used, but the dies are consumables and need to be re-polished or replaced at an appropriate time. The life of the mold can be extended several times by re-polishing. Further, if the timing of re-polishing is wrong, the dimensions of the mold may fluctuate and the processing accuracy may be lowered. The polishing time of the mold is currently determined by the operator himself observing the wear state of the mold.

  However, since the judgment of the polishing time depending on the observation by the operator is inefficient, a recent press machine is equipped with a counter that counts one in one process in order to count the number of production. The operator sets a count number that serves as a guide for die polishing for each die of the press machine, and when the press machine reaches the set count number, a message to the effect that the expected number of mold polishing has been reached is displayed. Notify the operator and encourage the operator to polish the mold. After polishing the mold, the operator clears the count number to zero and resumes processing. For example, Patent Document 1 discloses a technique related to a method for detecting a polishing time of a mold of a turret punch press.

Japanese Patent Laid-Open No. 61-074739

  A mold used in a recent press machine may have a plurality of components such as punches. And since the count number used as a standard of the metal mold | die grinding | polishing time differs for every component, it is necessary to prepare a some maintenance counter for every metal mold | die, and to manage a metal mold | die per component part.

  However, in the case of a press machine that can freely control the position and speed like a recent servo press machine, a plurality of processes can be performed in one process, and each component is used in one process. Since the number of times is different, there has been a problem that the conventional management of counting by one process cannot accurately manage the mold polishing time in units of mold components.

  The present invention has been made in order to solve the above-described problem, and a press capable of accurately managing the mold polishing time for each mold component even when performing a process in which a plurality of processes are integrated into one process. An object is to provide a mold management method and a mold management apparatus for an apparatus.

  The present invention has the following configuration in order to solve the above problems.

(1) A die management method for a press machine controlled by a program for performing press working using a die having a plurality of components,
The program has a plurality of maintenance count data for each component,
The maintenance count data has a scale corresponding to the usage frequency data of the component, the planned usage number data of the component, and the usage frequency per motion of the component,
The component usage record data is added to the magnification for each motion,
When the usage record number data reaches the scheduled use number data, an operator is notified of this fact.

  (2) The die management method for a press machine according to (1), wherein the press machine is any one of a crank press, a hydraulic press, and a screw press.

  (3) The die management method for a press machine according to (1), wherein the usage record number data is determined based on data detected by a rotary encoder or a linear scale of the press machine.

  (4) The die management method for a press machine according to (1), wherein the operation of the press machine is stopped when the use record number data reaches the planned use quantity data.

  (5) The mold management method for a press machine according to (1), wherein the magnification is determined based on motion data including data of the component, die height, target position, and number of repetitions.

(6) The press machine has a display means for displaying the magnification,
The press machine tool management method according to (1), wherein an operator of the press machine can manually change the magnification displayed on the display means.

(7) A mold management apparatus for a press machine that performs press processing using a mold having a plurality of components, and includes a control unit that controls the press process by a program, and a storage unit that stores the program. Have
The program has a plurality of maintenance count data for each component,
The maintenance count data has a scale corresponding to the usage frequency data of the component, the planned usage number data of the component, and the usage frequency per motion of the component,
The control means adds the magnification for each motion to the usage record number data of the component, and notifies the operator when the use record number data reaches the planned use number data. A die management apparatus for a press machine.

  According to the present invention, a mold management method and a mold management apparatus for a press machine capable of accurately managing the mold polishing time for each mold component even when processing is performed by integrating a plurality of processes into one process. Can be provided.

The figure for demonstrating the structure of the servo press machine of an Example. The figure for demonstrating the structure of the metal mold | die of a servo press machine of an Example, and the motion of a slide The figure which shows the structure of the control part of the servo press machine of an Example. The figure for demonstrating the data structure of the servo press of an Example The figure which shows the screen of the display apparatus on which the maintenance count data of the Example was displayed Flow chart of mold count-up control of embodiment

  DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described below with reference to the drawings.

  A press machine to which the die management method for a press machine of the present invention is applied will be described below by taking a servo press machine as a clamp type press machine as an example. The press machine to which the present invention is applied may be other hydraulic press machine or screw press machine.

[Configuration of servo press]
As shown in FIG. 1A, a servo press machine 1 that is a press machine according to an embodiment of the present invention presses a workpiece W by cooperation of a punch die 3 and a die die 5. Which is based on the main body frame 7.

  A bolster 9 is provided at the lower part of the main body frame 7, and the above-described die mold 5 is detachably provided above the bolster 9. Further, a slide 11 is provided above the bolster 9 in the main body frame 7 so as to be movable up and down, and the punch die 3 described above is detachably installed below the slide 11.

  A crankshaft 13 extending in the front-rear direction is rotatably provided above the slide 11 in the main body frame 7, and the crankshaft 13 has an eccentric portion 13 e that is eccentric in the vertical direction. The upper end of the upper connecting rod 15a is rotatably connected to the eccentric portion 13e of the crankshaft 13. The upper end of the lower connecting rod 15b is integrally connected to the lower end of the upper connecting rod 15a by screwing. The lower end of the lower connecting rod 15b is swingably connected to a part of the slide 11. The connecting rod 15 includes an upper connecting rod 15a and a lower connecting rod 15b.

  A servo motor 19 that rotates the crankshaft 13 to raise and lower the slide 11 is provided behind the slide 11 in the main body frame 7, and a drive gear 21 is integrated with an output shaft 19 s of the servomotor 19. A driven gear 23 meshed with the drive gear 21 is integrally connected to the rear end portion of the crankshaft 13. The servo motor 19 is provided with a rotary encoder 25 that detects the rotation angle of the output shaft 19 s of the servo motor 19.

  Therefore, the crankshaft 13 is rotated through the drive gear 21 and the driven gear 23 by driving the servo motor 19 and the slide 11 is moved up and down, whereby the workpiece W is moved by the cooperation of the punch die 3 and the die die 5. Can be processed. The servo press 1 is controlled by the control unit 50.

  FIG. 1B is a diagram illustrating a correspondence relationship between the rotation angle of the crankshaft 13 and the position of the slide 11. The crankshaft 13 and the slide 11 are connected by the connecting rod 15 as described above. The dead center in the figure indicates a point where no rotational force is generated by the crank mechanism, and the highest position is called the top dead center and the lowest position is called the bottom dead center. The slide 11 starts to descend from the start position within the start position range, passes through the bottom dead center, and returns to the start position.

[Example of mold configuration]
FIG. 2A shows an example of a press die 30 used in the servo press machine 1. In this mold 30, the die set upper mold 38 a, the guide bush 38 b, the guide post 38 c, and the die set lower mold 38 d constitute a die set 38. The die set upper die 38 a is installed below the slide 11 of the servo press machine 1, and the die set lower die 38 d is installed above the bolster 9 of the servo press machine 1. A die 41, a die plate 42, a positioning plate 44, and a knock pin 43 are installed on the lower die set die 38d. The workpiece W is positioned and fixed on the die plate 42 by the positioning plate 44.

  On the other hand, a stripper plate 37, a punch plate 35, a packing plate 36, a coil spring 34, a stripper bolt 33, a punch 131 and a punch 2 32 are installed on the die set upper die 38a. In the punch 1 31 and the punch 2 32, the position of the lower end is different, and as a result, the machining height is different. The time change of the height of the slide 11 of the servo press machine 1 of the present embodiment is shown in FIG. In FIG. 2B, A indicates the processing height of the punch 131, and B indicates the processing height of the punch 232. In this example, punch 1 31 is used four times in one motion, and punch 2 32 is used once in one motion. Therefore, the usage frequency of the punch 1 31 is four times the usage frequency of the punch 2 32.

[Configuration of control unit]
FIG. 3 shows the configuration of the control unit 50 of the servo press 1 of this embodiment. The control unit 50 includes a CPU 51, which is an arithmetic device, a storage device 52, an input device 53, a display device 54, and an encoder 25. The angle of the drive gear 21 detected by the encoder 25 is input to the CPU 51 and used for detecting the position of the slide 11 in the vertical direction and detecting the usage state of a mold such as a punch. A linear scale may be used for detecting the vertical position of the slide 11 instead of the encoder 25. The storage device 52 stores data of a plurality of programs. The operator uses the input device 53 to set and change the contents of the program data. Further, the CPU 51 displays the contents of data stored in the storage device 52 on the display device 54 for the worker.

[data structure]
FIG. 4 shows a data structure of data (program) used in the servo press machine 1 of this embodiment. Data is composed of a plurality of programs. Each program includes motion data, mold data, maintenance count data, and the like. The maintenance count data includes a counter No n, a mold name NNN, a mold usage record number CXn, a mold usage schedule number CYn, a magnification Mn, and a setting (off / on) n. Here, the magnification Mn is a weight based on the usage frequency or the like determined for each mold. For example, in the mold shown in FIG. 2, the magnification of the punch 1 is set to 4, and the magnification of the punch 2 is set to 1. The magnification Mn is set by the operator using the input device 53 described above, but the CPU 51 may automatically set the mold Mn (dimensions such as punches), die height, motion data (target position and number of repetitions), and the like. it can. Further, the setting (off / on) n refers to a setting as to whether or not to count the number of used molds CXn.

[Display screen]
FIG. 5 is a diagram showing a state in which maintenance count data or the like is displayed on the display device 54. In the display columns 54b, 54c, 54d, 54e, 54f, maintenance count data count Non, mold name, mold usage record number CXn, mold use planned number CYn, mold magnification Mn, respectively. Is displayed. Note that the magnification Mn displayed in the display field 54f can be changed while the operator looks at the screen of the display device 54. The display lamp 54a blinks when the actual number of used molds CXn exceeds the expected number of used molds CYn. The reset button 54g is a button for clearing the number CXn of actual use of the mold to zero. 54h is a count setting button for setting whether or not to count the number CXn of actual use of the mold. Note that the display device 54 in FIG. 5 has the function of the input device 53.

[Flow chart of mold count-up control]
FIG. 6 shows a flowchart of mold count-up control, and the flow will be described below. In step (hereinafter referred to as “S”) 101, the CPU 51 determines whether or not the crankshaft 13 is in the starting position range. When the CPU 51 determines in S101 that the crankshaft 13 is in the starting position range, the CPU 51 turns off the flag in S102. On the other hand, if the CPU 51 determines in S101 that the crankshaft 13 is not in the starting position range, the process proceeds to S103.

  Next, the CPU 51 determines whether or not the flag is off (OFF) in S103. If it is determined that the flag is not OFF, the process returns to S101. On the other hand, if the CPU 51 determines that the flag is OFF, it determines whether or not the crankshaft 13 has passed the bottom dead center in S104. If the CPU 51 determines in S104 that the crankshaft 13 has not passed through the bottom dead center, the CPU 51 returns to S101. If the CPU 51 determines that the crankshaft 13 has passed through the bottom dead center, the CPU 51 turns on the flag in S105. .

  Next, the CPU 51 sets n of the count No to 1 in S106. Then, the CPU 51 determines whether the setting (OFF / ON) n of the count setting button 54h is “OFF” or “ON”. If the CPU 51 determines in S107 that the setting (OFF / ON) n of the count setting button 54h is “OFF”, the CPU 51 proceeds to S112. On the other hand, if the CPU 51 determines that the setting (off / on) n of the count setting button 54h is “ON” in S107, the CPU 51 determines whether the expected number of molds CYn is 1 or more in S108. If the CPU 51 determines that the expected number of molds CYn is not 1 or more, the CPU 51 proceeds to S112. On the other hand, if the CPU 51 determines that the expected number of molds CYn is 1 or more, in S109, the CPU 51 adds the mold magnification Mn to the actual number of used molds CXn.

  Then, in S110, the CPU 51 determines whether or not the value of the usage record number CXn of the mold is equal to or more than the expected use number CYn of the mold. When the CPU 51 determines in S110 that the value of the actual number of used molds CXn is not equal to or greater than the expected number of used molds CYn, the process proceeds to S112. On the other hand, if the CPU 51 determines in S110 that the value of the number of used molds CXn is equal to or greater than the number of molds used CYn, the CPU 51 issues a count-up notification of n in S111 and proceeds to S112. . Specifically, the count-up notification is performed by blinking the display lamp 54a of FIG. 5 described above. In addition, CPU51 may perform control which stops operation | movement of a press apparatus instead of count-up notification. In step S112, the CPU 51 determines whether the count No. n is greater than or equal to n ′. Here, n ′ means the maximum value of the count number of the mold for which the count-up control is to be performed. For example, when it is desired to perform count-up control of a mold having a count No. up to 5 on the display screen of FIG. 5, n ′ = 5 is set. This setting is performed by the operator using the input device 53 (FIG. 3). If the CPU 51 determines that n of the count No is not equal to or greater than n ′, the CPU 51 sets n of the count No to n + 1 in S113 and returns to S107. On the other hand, if the CPU 51 determines that the count No. n is greater than or equal to n ′, the CPU 51 returns to S101.

  According to the mold management method and the mold management apparatus for a press machine of the present invention, accurate maintenance management can be performed for each mold component even when processing is performed by integrating a plurality of processes into one process.

DESCRIPTION OF SYMBOLS 1 Servo press machine 3 Punch die 5 Die die 7 Main body frame 9 Bolster 11 Slide 13 Crankshaft 13e Eccentric part 15 Connecting rod 15a Upper connecting rod 15b Lower connecting rod 19 Servo motor 19s Output shaft 21 Drive gear 23 Drive gear 25 Rotary encoder 30 Die Set 30a Die set upper die 30b Guide bush 30c Guide post 30d Die set lower die 31 Punch 1
32 Punch 2
33 Stripper bolt 34 Coil spring 35 Punch plate 36 Backing plate 37 Stripper plate 41 Die 42 Die plate 43 Knock pin 44 Positioning plate 50 Control unit 51 CPU
52 Storage Device 53 Input Device 54 Display Device 54h Count Setting Button W Work

Claims (7)

A mold management method for a press machine controlled by a program for performing press working using a mold having a plurality of components,
The program has a plurality of maintenance count data for each component,
The maintenance count data has a scale corresponding to the usage frequency data of the component, the planned usage number data of the component, and the usage frequency per motion of the component,
The component usage record data is added to the magnification for each motion,
When the usage record number data reaches the scheduled use number data, an operator is notified of this fact.   2. The die management method for a press machine according to claim 1, wherein the press machine is any one of a crank press machine, a hydraulic press machine, and a screw press machine.   2. The die management method for a press machine according to claim 1, wherein the usage record number data is determined based on data detected by a rotary encoder or a linear scale of the press machine.   2. The die management method for a press machine according to claim 1, wherein the operation of the press machine is stopped when the use record number data reaches the planned use number data.   2. The die management method for a press machine according to claim 1, wherein the magnification is determined based on motion data including data of the component parts, die height, target position, and number of repetitions. The press machine has a display means for displaying the magnification,
2. The die management method for a press machine according to claim 1, wherein an operator of the press machine can manually change the magnification displayed on the display means. A die management apparatus for a press machine that performs press working using a mold having a plurality of component parts, comprising: a control means for controlling the press work by a program; and a storage means for storing the program. And
The program has a plurality of maintenance count data for each component,
The maintenance count data has a scale corresponding to the usage frequency data of the component, the planned usage number data of the component, and the usage frequency per motion of the component,
The control means adds the magnification for each motion to the usage record number data of the component, and notifies the operator when the use record number data reaches the planned use number data. A die management apparatus for a press machine.

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