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Characteristic sample piece and method used for detecting positioning accuracy of three-axis diamond lathe

A technology of diamond lathe and positioning accuracy, applied in the direction of measuring devices, instruments, etc., can solve the problems of cumbersome detection process, large temperature influence, high environmental requirements, etc., and achieve the effect of simplifying the detection process, simplifying the detection method and detection process

Active Publication Date: 2015-05-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the detection process of this detection method is cumbersome and has extremely high environmental requirements, and the measurement results are greatly affected by temperature.

Method used

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  • Characteristic sample piece and method used for detecting positioning accuracy of three-axis diamond lathe
  • Characteristic sample piece and method used for detecting positioning accuracy of three-axis diamond lathe
  • Characteristic sample piece and method used for detecting positioning accuracy of three-axis diamond lathe

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specific Embodiment approach 1

[0028] Specific Embodiment 1: This embodiment provides a method for detecting the positioning accuracy of a three-axis diamond lathe based on characteristic samples. Through theoretical derivation and analysis, it can be known that the positioning accuracy of each axis of the diamond lathe affects the surface shape error of the processed workpiece. relationship, and then according to the above relationship, design a feature sample that can accurately reflect the positioning accuracy of each axis of the machine tool, and use the three-coordinate measuring machine precision equipment to detect the processed feature sample. Through various measurement data, the diamond lathe can be reversely characterized. The positioning accuracy of each axis.

[0029] like figure 1 As shown, the specific implementation steps are as follows:

[0030] 1. Use a diamond lathe to process feature samples. A three-axis diamond lathe with a T-shaped layout such as figure 1 As shown, the X and Z line...

specific Embodiment approach 2

[0037] Specific embodiment two: This embodiment provides a method for detecting the positioning accuracy of a three-axis diamond lathe based on characteristic samples, and the specific steps are as follows:

[0038] 1. Use a diamond lathe to process feature samples.

[0039] 2. During the machining process, when machining the outer cylindrical surface, only the Z axis needs to be fed linearly, and the other two axes remain stationary; when machining steps and end planes, only the X axis is required to be fed linearly, and the other two axes remain stationary.

[0040] 3. Use a three-coordinate measuring machine for axial height measurement. Assuming that the height of each step in the axial direction is a, take the top end of the base as the measurement reference point, measure the height difference between the top end of each step and the measurement reference point, repeat the measurement 5 times in both positive and negative directions, and record the results According to ...

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Abstract

The invention discloses a characteristic sample piece and method used for detecting the positioning accuracy of a three-axis diamond lathe. The sample piece comprises a base and a characteristic body fixed to the upper end of the base. The base is a flat cylinder. Twelve grooves are evenly distributed in the outer edge of the upper surface of the base in the circumferential direction. The characteristic body comprises five flat cylinders which are coaxially arranged, wherein the diameters of the flat cylinders sequentially increase from top to bottom, a step is formed by the edges between every two adjacent flat cylinders, and the base and the characteristic body are coaxially arranged. The method includes the steps of machining the characteristic sample piece through the three-axis diamond lathe arranged in a T shape, measuring the step height faces, the cylinder diameters and the groove central lines of the characteristic sample piece through a three-coordinate measurement machine after machining is completed, and inferring the positioning accuracy of the three-axis diamond lathe according to the detection result. The designed sample piece has the advantages of being simple in structure, convenient to machine, capable of effectively reflecting the positioning accuracy, and the like.

Description

technical field [0001] The invention belongs to the field of ultra-precision diamond lathes, and relates to a characteristic sample and a method for detecting the positioning accuracy of a three-axis diamond lathe. Background technique [0002] At present, the detection method of positioning accuracy of three-axis diamond lathe is to use laser interferometer for calibration. During the measurement process, move the moving parts along or around the axis to a series of target positions according to the programming of the machine tool and stay at each target position for a sufficient time to measure and record the actual position. The machine tool should follow the program at the same feed speed Move between target locations. The measurement needs to be repeated five times. For the measurement results of each target position, the calculation method specified in GB-T 17421.2-2000 (General Rules for Machine Tool Inspection Part 2: Determination of Positioning Accuracy and Repeat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/10G01B21/24
CPCG01B21/042G01B21/10G01B21/24
Inventor 孙涛邹喜聪李国赵学森李增强胡振江
Owner HARBIN INST OF TECH
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