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A fully automatic contact measuring device and method

A contact measurement and contact technology, which is applied in the field of automatic contact measurement devices, can solve the problems of interference of optical measurement results, inability to fully reflect the geometric dimensions of the workpiece, and inability to measure the side and bottom surfaces, etc., to achieve the effect of improving efficiency

Active Publication Date: 2020-08-25
SHANGHAI JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. There are usually pores and burrs on the surface of the workpiece, which interfere with the optical measurement results;
[0005] 2. This solution can only scan the upper surface of the workpiece, and cannot measure the side and bottom surfaces, so it cannot fully reflect the geometric dimensions of the workpiece
In addition, defects at the edge of the upper surface can interfere with optical measurements

Method used

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  • A fully automatic contact measuring device and method
  • A fully automatic contact measuring device and method
  • A fully automatic contact measuring device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0155] Typical measurement workpieces are attached Figure 7As shown, the thickness direction of the workpiece 700 to be measured is the A surface and the B surface, and there are 9 measuring points arranged opposite to each other, which are respectively A1-A9; the length direction is the E surface and the F surface, and there are four measuring points arranged relatively, namely E3- E6; The direction perpendicular to the E surface and the F surface pointing to the inner side of the workpiece is recorded as L-, and the direction pointing to the outer side of the workpiece is recorded as L+; the width direction is the C surface and the D surface, and there are four measuring points relative to each other, namely C3~C6; In addition, at the corner of the length and width of the workpiece, parallel to the length and width, the surface is offset by a certain distance inside the workpiece, thus forming four missing corners. The depth is recorded as the angle width, and the angle len...

Embodiment 2

[0258] A single measuring arm is arranged on the beam 103 of the automatic contact measuring machine, and five contact displacement sensors 303 in Z-, L+, L-, Y+, and Y-directions are arranged on the measuring arm. There is a jacking measuring part in the middle of the platform, and the jacking measuring part also includes a traverse drive assembly 205, and the traverse drive assembly 205 uses a servo motor to drive the jacking measuring part to traverse the guide rail group 605 along the X direction within the length range of the workpiece. It can accurately locate the position of any measurement point on the B surface of the workpiece. A contact displacement sensor 303 in the Z+ direction is arranged on the jacking measuring part. The material of the workpiece is pine board, which is shaped by cutting, and there are a few air holes with a diameter of no more than 4mm on the surface and burr-like protrusions of wooden fibers.

[0259] The upper part of the first measuring ar...

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Abstract

The invention relates to a full-automatic contact type measuring device and method. The measuring device comprises a test bench, a longitudinal sliding table and a cross beam, wherein the longitudinalsliding table is longitudinally arranged on the test bench in a sliding mode and can be used for fixedly placing a measured workpiece, the cross beam is suspended above the test bench, and a measuring arm which can move back and forth along the cross beam is arranged on the cross beam. Compared with the prior art, the device in the invention is the device specially for rapid and high-precision measurement of the geometric dimension of large-size workpieces with pores and burrs on the surface, a contact type displacement sensor is used for measuring the size of the workpiece, and the defects of the existing measuring method are avoided, so that the influence of the pores and burrs on the surface of the workpiece on the precision can be avoided by the measuring device, the measurement of the large-size workpiece is more efficient and accurate, relatively complex workpiece shapes can be adapted to, and various dimensions of the thickness, the perpendicularity, the parallelism, the flatness and the like can be measured; meanwhile, the cost of the measuring device is lower, and the maintenance and the calibration are simpler and more convenient.

Description

technical field [0001] The invention belongs to the technical field of component surface dimension measurement, and relates to a fully automatic contact measurement device and method. Background technique [0002] It is usually difficult to ensure the accuracy and efficiency of multi-point measurement of length, width, height and other dimensions of large-scale porous material workpieces with rough surfaces. In the actual production of such workpieces, most of them use manual measurement. The disadvantages are that the human measurement error is large, the measurement efficiency is low, and the labor intensity is high. Generally, only random inspection can be realized, and there is a risk of quality loss. In addition, the traditional three-coordinate measuring equipment obtains the size of the workpiece by recording the position where the sensor touches the workpiece, which requires the equipment itself to ensure high dimensional accuracy at each measurement position, making...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/02G01B21/08G01B21/18G01B21/30G01B21/22G01B21/24
CPCG01B21/02G01B21/08G01B21/18G01B21/22G01B21/24G01B21/30
Inventor 蒋知峰孔谅周春立金鑫张立中梁诚张悦
Owner SHANGHAI JIAOTONG UNIV
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