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Method for online measuring size of workpiece on lathe

A workpiece and lathe technology, applied in the field of online detection, can solve the problems of complex measurement error conversion and difficult measurement, and achieve the effects of simplified error calculation, convenient application, and convenient error correction

Active Publication Date: 2014-04-02
HUBEI SANJIANG SPACE XIANFENG ELECTRONICS&INFORMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides an on-line measurement method for turning rotary parts with oblique or curved cross-sections. The overshoot error of the measuring head is obtained by calibration with a calibration ball, and the center of the measuring ball is used to measure As the basic point of measurement and calculation, it solves the problems of difficult measurement of various angles and complex measurement error conversion

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  • Method for online measuring size of workpiece on lathe
  • Method for online measuring size of workpiece on lathe
  • Method for online measuring size of workpiece on lathe

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specific Embodiment approach

[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] The online detection method of this embodiment can detect the outer surface of a part, such as the outer peripheral surface of a rotary part, and can also detect the inner hole of a part, such as a part whose inner hole is turned by turning.

[0046] The two measurement methods are described in detail below with specific examples.

Embodiment 1

[0048] In this embodiment, on-line measurement is carried out on the surface of the turning body parts whose shape is turned, and the method specifically includes the following steps:

[0049] 1. Calibration

[0050] 1.1 Make as figure 1 The calibration tool of the external shape, the calibration ball of the calibration tool is a standard high-precision detection ball, which is installed on the right calibration seat 2 with the screw 3 and the washer 4 to ensure a certain installation accuracy, such as figure 1 .

[0051] 1.2 as figure 2 As shown, clamp and calibrate the tooling, align and calibrate the tooling ball within 0.01mm, establish a coordinate system with the center of the calibrated tooling sphere, and input the X and Z tool offset lengths for tool setting with the limit edge of the probe measuring ball X and Z, Then convert to the X and Z tool offset lengths at the center of the probe ball.

[0052]Since the measuring head is an elastic moving part, it is not ...

Embodiment 2

[0078] In this embodiment, the on-line measurement is carried out on the rotary body parts turned by the inner wall, and the method specifically includes the following steps:

[0079] 1. Calibration

[0080] 1.1 Make as Figure 5 For the inner hole calibration tooling shown, in order to ensure the calibration accuracy, the machining accuracy of the part should be guaranteed.

[0081] 1.2 as Image 6 Clamp and calibrate the outer circle of the D1 tooling, align the outer circle within 0.01mm, align the plane perpendicular to the vertical cylindrical surface and parallel to the X axis, establish a coordinate system with the circle perpendicular to the cylindrical surface and the center of the spindle, and set the tool according to the shape The delta length.

[0082] Since the measuring head is an elastic moving part, it is not possible to accurately measure the offset length of the measuring ball center X and Z tool by rigid tool setting, and the optical tool setting instrum...

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Abstract

The invention discloses a method for online measuring the size of a workpiece on a lathe. The method comprises the steps: (1) establishing a calibration tool; (2) establishing a coordinate system based on the ball center of the calibration tool, so as to obtain the cutter offset lengths of the center of a measuring ball in X and Z directions; (3) controlling a measuring head of the lathe to respectively touch a calibration ball from different normal directions according to a determined center zero point of the measuring ball, so as to obtain the overshoot error sigma of the measuring head of the lathe in each direction; (4) touching a calibration face of the calibration tool by using the measuring head, so as to obtain read coordinate values of the calibration face and further be capable of obtaining a measuring value of the calibration face and obtaining a measuring error according to the measuring value and a theoretical value of the calibration face; (5) amending the cutter offset lengths in X and Z directions according to the measuring error, thereby obtaining accurate relative cutter length between the center of the measuring head and a zero point of the workpiece and completing calibration. The method disclosed by the invention has the advantages that the accuracy of detection on machining parts is improved greatly, a calibration detection macroprogram can be programmed, the application is convenient, and the detection accuracy is high.

Description

technical field [0001] The invention relates to the field of on-line detection in lathe processing, in particular to a method for on-line detection of workpiece size on a lathe, which is suitable for on-line detection and calibration errors of parts whose outer surface and / or inner wall surface are oblique or curved. Measurement errors are eliminated. Background technique [0002] In the lathe turning process, for the rotary parts with oblique lines or curved surfaces, when performing online detection, it is usually as follows figure 1 The method shown is to convert the theoretical value D of the workpiece diameter whose section is a slanted line or a curved arc line into the theoretical value D1 detected by the probe at this point, and perform detection in the X or Z direction. The numerical control system only performs the probe in the The actual value detected at this point is compared with the theoretical value D1, and the error is recorded. [0003] The above scheme h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q17/20
CPCB23Q17/20B23Q2717/003
Inventor 王晓兵杨建华赵凯熊大成
Owner HUBEI SANJIANG SPACE XIANFENG ELECTRONICS&INFORMATION CO LTD