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Ultraprecise free-form surface turning method of actively counteracting errors

An ultra-precise, motion error technology, used in automatic control devices, metal processing equipment, metal processing mechanical parts, etc., can solve problems such as low processing accuracy and poor surface quality

Active Publication Date: 2011-05-25
苏州星也航天科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The invention provides an active error offset free-form surface ultra-precision turning method to solve the problems of low processing accuracy and poor surface quality of free-form surface ultra-precision turning of a two-axis ultra-precision numerical control lathe

Method used

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  • Ultraprecise free-form surface turning method of actively counteracting errors
  • Ultraprecise free-form surface turning method of actively counteracting errors
  • Ultraprecise free-form surface turning method of actively counteracting errors

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Embodiment Construction

[0043] Such as figure 1 As shown, the workpiece 1 is installed on the fixture 2 at the front end of the spindle of a two-axis ultra-precision CNC lathe, and a two-degree-of-freedom FTS device 3 is installed on On the shaft carriage 4, the diamond tool 5 is clamped on the two-degree-of-freedom FTS device 3, and the ultra-precision CNC lathe axis and The shafts are in a "T" configuration. A high-precision rotary grating 6 is installed at the end of the spindle to detect the spindle rotary pulse, high-precision Axis linear grating 7, 8 axis linear gratings are used to detect axis with Coordinate position of axes, high resolution Displacement sensor 9, Displacement sensors 10 are used to detect FTS devices respectively and The reciprocating motion of the shaft, the temperature sensors 11, 12, 13 are installed on the ultra-precision CNC lathe to detect temperature changes, and these detection signals are fed into a high-performance multi-axis motion controller 1...

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Abstract

The invention relates to an ultraprecise free-form surface turning method of actively counteracting errors, which belongs to the field of ultraprecise free-form surface optical element turning. The method comprises the following steps: generating an ideal tool position point locus; establishing a system of implementing the ultraprecise free-form surface turning method of actively counteracting the errors; respectively carrying out error correction on the acquired ideal tool position point locus in the X direction and the Z direction according to the projection components of composition errors between a tool and a workpiece in the X direction and the Z direction so as to acquire the actually corrected tool position point locus; respectively generating a computer numerical control (CNC) command by an X component and a Z component of constant smooth trend motion so as to drive two linear axes X' and Z; and carrying out synchronous tracking by making the X component and the Z component of disturbance motion respectively serve as the desired output of two linear axes X and Z' of a fast tool servo (FTS). The invention has the advantages that the processing precision and the surface quality can be acquired.

Description

technical field [0001] The invention belongs to the technical field of ultra-precision turning processing of free-form surface optical parts, and in particular relates to a free-form surface ultra-precision turning method for active error cancellation. Background technique [0002] Freeform surface optical parts have increasing application requirements in many important industrial fields, which forces industry and academia to actively explore methods to improve machining accuracy and surface quality. Based on fast tool servo (hereinafter referred to as FTS) or slow carriage servo (hereinafter referred to as S 3 ) ultra-precision turning is generally considered to be the most promising method for creating free-form surfaces, and active error cancellation is the most cost-effective way to improve the precision and surface quality of ultra-precision turning, especially using FTS or S 3 Active cancellation of asymmetrical error motions, low-medium or high-frequency error motio...

Claims

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Application Information

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IPC IPC(8): B23Q15/013
Inventor 周晓勤林洁琼段宁华
Owner 苏州星也航天科技有限公司
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