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Control system of error measurement and compensation of curve contour

A technology of curve contour and error measurement, applied in general control system, control/regulation system, digital control, etc., can solve the problems of driver and controller contour error, machine tool structure error, poor practicability, etc., and achieve contour error compensation The effect of enhanced capability, strong contour error compensation capability, and strong automatic control capability

Inactive Publication Date: 2015-09-16
张万军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) In the past, the machine tool structure of the high-end multi-axis linkage CNC machine tool will generally produce machine tool structure errors due to screw clearance and guide rail wear; the driver and controller will generally produce contour errors due to external interference. Although this type of machine tool is multi-axis Linked high-end CNC machine tools do not have corresponding error measurement and compensation devices, which are generally provided by the manufacturer and cannot be assembled or modified by users;
[0004] (2) In the past, high-end CNC machine tools with multi-axis linkage did not have special chips and special burning programs for contour error measurement and compensation. They only used CNC software programs to eliminate small-scale errors to a certain extent, but the effect was not ideal;
[0005] (3) There is no special contour error simulator for high-end CNC machine tools with multi-axis linkage, the measurement accuracy of the contour error is low, the interpolation control accuracy is not high, and the practicability is not strong

Method used

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  • Control system of error measurement and compensation of curve contour
  • Control system of error measurement and compensation of curve contour
  • Control system of error measurement and compensation of curve contour

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A control system for curve profile error measurement and compensation provided in this embodiment, such as figure 1 As shown, it includes a CNC PC, a motion control card for measuring and compensating curve contour errors, a drive module, a motor module and a position detection module. Described numerical control PC machine comprises the numerical control PC machine with curve contour error compensation function, serial port device, touch screen and PCI chip; One end is connected with touch screen to realize man-machine dialogue, and the other end is through PCI chip through PCI bus and curve contour error measurement and compensation The motion control card is connected to realize the measurement and compensation of the curve contour error.

[0054] The serial port device includes a serial port device and a serial port circuit; the serial port device is connected with the DSP module in the motion control card for curve profile error measurement and compensation through...

Embodiment 2

[0140] In order to verify the identifiability and correctness of the curve profile error compensation of the present invention, the experimental effect of the present invention is as follows:

[0141] Specifically, such as Figure 11 Shown as a sinusoidal As an example, the interpolation point x∈[0 2π] randomly selects 30 values, and uses the control system for curve contour error measurement and compensation to Perform interpolation to get the theoretical curve and the contour error compensation curve, the curve between the theoretical curve and the contour error compensation curve is the curve contour error, which is determined by Image 6 It can be seen that the curve profile error is less than 0.6 μm, and it can be compensated by the curve profile error compensation method in the processing of small segments; at the same time, the theoretical curve and the profile error compensation curve are similar, but there is a deviation between the theoretical curve and the profil...

Embodiment 3

[0143] The experimental effect that the present invention carries out:

[0144] Set the experimental data of the system simulation, as shown in Table 1; Figure 12 As shown, input a NC program for interpolation, in figure 1 The numerical control simulation interpolation is carried out in the control system of curve profile error measurement and compensation as shown, the simulation diagram is as follows Figure 13 shown.

[0145] Table 1 sets the system simulation parameter values

[0146]

[0147] Specifically, by simulating Figure 13 It can be seen that the space curve simulation is carried out in the curve interpolation contour error measurement and compensation control system using NC program. There are two curves in the figure, which are the original curve and the contour error compensation curve, and the difference between the original curve and the contour error compensation curve. The curve segment sandwiched between is the space curve profile error curve. Obvi...

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Abstract

Disclosed in the invention is a control system of error measurement and compensation of a curve contour. The control system comprises a numerical control PC machine, a curve contour error measurement and compensation motion control card, a drive module, a motor module, and a position detection module. The numerical control PC machine contains a numerical control PC unit having the curve contour error compensation function, a serial port device, a touch screen, and a PCI chip; one end is connected with the touch screen to realize the man-machine conversation and the other end is connected with the curve contour error measurement and compensation motion control card based on the PCI chip by a PCI bus, thereby realizing measurement and compensation of the curve contour error. According to the invention, automatic measurement and compensation of the curve contour error can be realized; the interpolation precision of the numerical control system is improved; the curve contour error is reduced; the cost is lowered; and the great economic and social benefits can be created.

Description

technical field [0001] The invention relates to the field of electromechanical integrated numerical control interpolation and contour error control, and more specifically relates to a control system for measuring and compensating curve contour errors. Background technique [0002] In recent years, with the rapid development of the manufacturing industry, multi-axis linkage high-end CNC machine tools have the advantages of high processing precision, strong adaptability of processing capacity and small processing error, and are used in the processing tools of precision instruments, aerospace industry, mold and other manufacturing industries. The field has a very wide range of applications. However, the measurement, compensation and control of curve machining contour errors in the past multi-axis high-end CNC machine tools have the following problems: [0003] (1) In the past, the machine tool structure of the high-end multi-axis linkage CNC machine tool will generally produce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/4103G05B19/19
CPCG05B19/4103G05B19/19G05B2219/34083G05B2219/35408
Inventor 张万军
Owner 张万军
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