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Numerical control device

A numerical control device and a technology for predicting parameters, applied in automatic control devices, feeding devices, digital control, etc., can solve the problems of deterioration of machining accuracy, machining surface quality, mechanical vibration suppression, etc., and achieve the effect of vibration suppression

Active Publication Date: 2019-07-19
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, the movement of the drive shaft may cause mechanical vibration, which may degrade the machining accuracy or the quality of the machined surface
In particular, in the case where the moving direction of the object moved by the drive shaft is different from the vibration direction of the mechanical vibration, even if the error in the moving direction of the object moved by the drive shaft is suppressed by performing feedback control on the drive shaft, it cannot Suppresses the error of mechanical vibration whose direction is different from the moving direction of the object moved by the drive shaft

Method used

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  • Numerical control device
  • Numerical control device
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] figure 1 It is a figure which schematically shows an example of the structure of a machine tool. The working machine 1 has: a base 2 serving as a base; a table 4 that holds a workpiece 3 that is a processing object, is movable in the horizontal direction, and is also capable of rotating in a horizontal plane; and a machining head 6 that holds a tool 5 , which can move in the vertical direction; and a column 7, which is fixed on the base 2 and supports the processing head 6. The numerical control device is connected to the working machine 1, and according to the instructions from the numerical control device, the worktable 4 moves in the horizontal direction or rotates in the horizontal plane, or the processing head 6 moves in the vertical direction, and the workpiece 3 is processed into the desired shape by the tool 5. shape.

[0029] In this machine tool 1 , the driving force when the table 4 is moved is transmitted as a reaction force, and vibrations are generated i...

Embodiment approach 2

[0160] Figure 13 It is a block diagram showing an example of the functional configuration of the numerical control device according to Embodiment 2 of the present invention. The 1st drive shaft 31a and the 2nd drive shaft 31b are connected to the numerical control device 10a. The 1st encoder 32a which detects the position and speed of a drive object is connected to the 1st drive shaft 31a, and the 2nd encoder 32b which detects the position and speed of a drive object is connected to the 2nd drive shaft 31b.

[0161] The control device 10a is equipped with: a drive shaft movement amount prediction unit 11, which is a first prediction unit that calculates the predicted movement amount of the first drive shaft 31a; The second predicting part that calculates the predicted moving amount of the second object accompanying the movement of the shaft 31a; the correction amount calculating part 13 that calculates the correction amount of the first drive signal; the first position feedb...

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Abstract

A numerical control device (10) is provided with: a drive shaft movement amount-predicting unit (11) for predicting a first movement amount of a first object, which is the object moved by a first drive shaft, using a first drive signal; a movement amount-predicting unit (12) for an object other than the driven object that predicts, using the first drive signal, a second movement amount of a secondobject in three-dimensional space that occurs due to the driving force of the first drive shaft; a correction amount-calculating unit (13) for calculating the correction amount for the first drive signal on the basis of the first movement amount and the second movement amount; and a first correction signal-outputting unit (16) for outputting a first post-correction drive signal, in which the first drive signal has been corrected by the correction amount, to a driving unit for driving the first drive shaft.

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 movement of the drive shaft may cause mechanical vibration, which may degrade machining accuracy or machined surface quality. In particular, in the case where the moving direction of the object moved by the drive shaft is different from the vibration direction of the mechanical vibration, even if the error in the moving direction of the object moved by the drive shaft is suppressed by performing feedback control on the drive shaft, it cannot The error of mechanical vibration whose direction is different from the moving direction of the object moved by the drive shaft is suppressed. Therefore, a technique for suppressing vibration in a direction different from the moving direction of the drive shaft, which is caused by the operation of the drive shaft, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q15/12G05B19/404
CPCG05B19/404G05B2219/49176G05B2219/37077G05B2219/37436G05B2219/42044G05B19/402G05B19/416B23Q15/12
Inventor 东俊博藤田智哉植松正行佐藤刚
Owner MITSUBISHI ELECTRIC CORP