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Electric press, control method and program

A technology of electric presses and electric motors, applied to presses, stamping machines, manufacturing tools, etc., can solve problems such as overshooting of punches, and achieve the effect of preventing the prolongation of production time

Active Publication Date: 2021-01-26
JANOME CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a driving mode, sometimes the punch will overshoot relative to the position where it should stop

Method used

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  • Electric press, control method and program
  • Electric press, control method and program
  • Electric press, control method and program

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach ＞

[0038] Next, use Figure 1 to Figure 6 A first embodiment of the present invention will be described.

[0039]

[0040] use figure 1 The configuration of the electric press machine according to this embodiment will be described.

[0041] Such as figure 1 As shown, the electric press 100 according to this embodiment includes a punch 1 and a ball screw 2 for the press, and these components are arranged in the main body 3 of the press, wherein the punch 1 moves the workpiece W ( processing object) to apply a desired pressure, and the ball screw 2 moves the punch 1 up and down (linear motion). In addition, a servomotor 4 such as an AC servomotor serving as a driving source is also accommodated in a head frame of a casing 5 connected to the press main body 3 . Further, the drive of the servo motor 4 is transmitted to the ball screw 2 via a pulley and a belt.

[0042] Such as figure 1 As shown, the punch 1 is formed as a cylindrical body. Specifically, a hollow portion is f...

no. 2 Embodiment approach ＞

[0105] use Figure 7 , Figure 8 The electric press 110 according to this embodiment will be described. In addition, the electric press machine 110 according to the present embodiment is related to a two-stage driving system in which the pressing operation is performed by temporarily stopping at a set load value and then moving the punch 1 by a predetermined distance.

[0106]

[0107] Such as Figure 7 As shown, the central processing unit 20A according to the present embodiment includes a speed detection unit 30 , a first estimation unit 41 , a load slope value calculation unit 33 , a second estimation unit 44 , and a drive command pulse signal stop unit 45 . In addition, since constituent elements assigned the same reference numerals as those in the first embodiment have the same functions, detailed description thereof will be omitted.

[0108] For the driving process of the first stage, the first estimation unit 41 estimates the overshoot distance (residual pulse amou...

no. 3 Embodiment approach ＞

[0122] use Figure 9 to Figure 11 The electric press 120 according to this embodiment will be described. In addition, the electric press 120 according to this embodiment is related to a so-called differential load stop method in which the stop process is performed when the gradient of the load exceeds the target load gradient value.

[0123]

[0124] Such as Figure 9 As shown, the electric press machine 120 according to this embodiment is configured to include a servo motor driver 13, an encoder 14, a CPU (Central Processing Unit) 20B, a control program storage unit 21, a display unit 22, an operation unit 23, a temporary memory part 24 , target load slope value storage part 25A, data column storage part 26 , circuit part 27 , drive command pulse generation part 28 and encoder position counter 29 . In addition, since constituent elements assigned the same reference numerals as those in the first embodiment have the same functions, detailed description thereof will be omit...

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Abstract

The present invention provides an electric press machine capable of preventing prolongation of production lead time and performing pressurization work on a workpiece with an appropriate load. It has: an electric motor; a motor driver, which supplies driving power to the electric motor; a punch, which uses the power of the electric motor to pressurize the workpiece; and a target load value storage unit, which stores the target load value of the punch, and Equipped with: a first estimation unit that estimates the overshoot distance of the punch after the supply of the drive command pulse signal input to the motor driver is stopped; a second estimation unit that estimates the movement of the punch until reaching the target load value distance estimation; and a driving command pulse signal stopping unit that stops supply of the driving command pulse signal when the estimated value of the first estimating unit becomes the estimated value of the second estimating unit.

Description

technical field [0001] The present invention relates to an electric press, a control method and a program. Background technique [0002] In general, electric presses have drive modes such as "constant speed, load stop" and "constant speed, differential stop". In such a driving mode, sometimes the punch overshoots from the position where it should stop. It is known that the amount of overshoot generally depends on the driving speed of the punch, and the higher the driving speed, the greater the amount of overshoot. [0003] In order to reduce such an overshooting phenomenon, "deceleration load factor" (when the target load reaches the set load factor, the driving speed is set to a low speed and the pressurization control is performed), "reference stop position" is prepared. (A method of setting the position where the punch should stop and starting pressurization at an ultra-low speed from this position). [0004] Also disclosed is a method of adaptively changing the drive ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B30B15/14B30B1/18
CPCB30B1/18B30B15/14B30B15/26
Inventor 比留间健一郎
Owner JANOME CORP