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CNC device

A numerical control device and parameter technology, applied in the direction of automatic control device, tool changing device, program control, etc., can solve the problems of machining accuracy and quality deterioration, vibration, etc.

Active Publication Date: 2021-03-12
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When machining is performed with a machine tool, due to the driving force of the movable body, the relative displacement between the movable body and the non-movable body may vibrate, and the processing accuracy and quality may deteriorate.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0023] figure 1 It is a figure which schematically shows an example of the structure of the machine tool 1 concerning Embodiment 1 of this invention. figure 2 It is a block diagram showing an example of the functional configuration of the numerical control device 8 according to the first embodiment. In addition, in figure 1 In FIG. 2 , illustration of the numerical control device 8 and the driving unit 11 connected to the machine tool 1 is omitted.

[0024] The machine tool 1 includes: a base 2 serving as a base; a table 4 holding a workpiece 3 to be processed so as to be movable in the horizontal direction and rotatable in a horizontal plane; and a head 6 holding a tool 5 It can move in the vertical direction; and the column 7 is fixed on the base 2 to support the head 6 .

[0025] The numerical control device 8 is connected to the machine tool 1 and a drive unit 11 that controls and drives the position and speed of a motor of the machine tool 1 . The numerical control d...

Embodiment approach 2

[0092] Image 6 It is a block diagram showing an example of the functional configuration of the numerical control device 81 according to Embodiment 2 of the present invention. The difference between the numerical control device 81 and the numerical control device 8 according to Embodiment 1 is that the relative displacement calculation unit 13 is changed to a relative displacement calculation unit 131 .

[0093] The relative displacement calculation unit 131 has a relative displacement calculation unit 18 and a filter processing unit 19 . The relative displacement calculation unit 18 performs the same processing as that of the relative displacement calculation unit 13 according to the first embodiment. In Embodiment 2, the relative displacement between the tool and the workpiece output from the relative displacement computing unit 18 is defined as the relative displacement before filter processing. The pre-filter relative shift output from the relative shift computing unit 1...

Embodiment approach 3

[0099] Figure 8 It is a block diagram showing an example of the functional configuration of the numerical control device 82 according to Embodiment 3 of the present invention. The difference between the numerical control device 82 and the numerical control device 8 according to Embodiment 1 is that the numerical control device 82 further includes the inertia change information prediction unit 22 . Furthermore, the difference from Embodiment 1 is that the feasibility of the change process of the predicted model parameters in the model parameter calculation unit 14 is determined based on the inertia change information output from the inertia change information prediction unit 22 .

[0100] The inertia change information prediction unit 22 acquires the inertia information of the workpiece 3 output from the drive unit 11 or the shaft position information output from the position command generation unit 17, and outputs the inertia change information indicating that the inertia of ...

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Abstract

The numerical control device (8) has: a tool side displacement measuring part (9), which measures the physical quantity related to the displacement of the tool; a workpiece side displacement measuring part (10), which measures the physical quantity related to the workpiece displacement; A signal measurement unit (12), which measures the drive signal; a relative displacement calculation unit (13), which calculates the relative displacement of the tool and the workpiece; a relative displacement prediction unit (15), which is based on the representation of the drive signal and the relative displacement A predictive model of the relationship, which calculates the predicted value of relative displacement according to the driving signal; a model parameter operation unit (14), which generates predictive model parameters constituting the predictive model based on the drive signal, relative displacement, and predicted value of relative displacement; and corrects the command value The unit (16) outputs as a command the corrected position command corrected for the position command of the drive unit (11) using the predictive model parameters, and the model parameter calculation unit (14) changes the predictive model parameters so that The relative displacement and the deviation of the relative displacement predicted value are suppressed.

Description

technical field [0001] The invention relates to a numerical control device for controlling a working machine according to a processing program. Background technique [0002] When machining is performed by a machine tool, the relative displacement between the movable body and the non-movable body may vibrate due to the driving force of the movable body, and the processing accuracy and quality may deteriorate. To address this problem, Patent Document 1 proposes a technique in which a numerical control device predicts relative displacement using a previously created prediction model for predicting relative displacement, and performs feedforward correction based on the predicted relative displacement. According to this technology, it can cope even when the driving direction and the vibration direction are different. [0003] Patent Document 1: Japanese Patent No. 6180688 Contents of the invention [0004] However, in actual machining, the relative displacement between the to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/404
CPCG05B2219/37436G05B2219/37077G05B2219/41154G05B2219/42044G05B19/404G05B19/402G05B13/048G05B13/0265B23Q15/12G05B13/041Y10T483/17Y10T483/13Y10T483/14Y10T483/15Y02P90/02
Inventor 木全敏章藤田智哉东俊博井藤达也
Owner MITSUBISHI ELECTRIC CORP