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Measuring device and method for measuring straightness of cylinder by three-coordinate measuring machine

A technology of a three-coordinate measuring machine and a measuring device, applied in the field of machining, can solve the problem of not being able to measure each section of a 1080mm cylinder in the whole process, so as to facilitate multiple or batch measurements, ensure measurement efficiency, and ensure measurement accuracy and accuracy. Effect

Pending Publication Date: 2022-06-28
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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  • Application Information

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Problems solved by technology

[0004] The difficulty in solving the above technical problems lies in: for a cylinder with a length of 1080mm, the connecting rod used by the instrument can be connected to a maximum of 400mm. No matter which axis of the measured cylinder is placed parallel to the instrument, it is impossible to measure all the sections of the 1080mm cylinder.

Method used

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  • Measuring device and method for measuring straightness of cylinder by three-coordinate measuring machine
  • Measuring device and method for measuring straightness of cylinder by three-coordinate measuring machine
  • Measuring device and method for measuring straightness of cylinder by three-coordinate measuring machine

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Embodiment 1

[0056] A measuring device for measuring the straightness of a cylinder by a three-coordinate measuring machine, comprising: a special auxiliary measuring device, which comprises a positioning seat 1, a positioning sphere 2 and a positioning rod 3 connected between the two, and the special auxiliary measuring device is fixed At a designated position on one side of the measured cylinder 4; a three-coordinate measuring machine, which includes a worktable 5 for positioning the measured cylinder 4, and is used to obtain the coordinate values ​​of each point of the measured cylinder 4 / positioning sphere 2 The ball probe 6 and the three-coordinate moving component used to drive the ball probe 6 to move.

[0057] In this embodiment, the method of combining a three-coordinate measuring machine and a special auxiliary measuring device is used to solve the problem of measuring the straightness of the line connecting the centers of the multi-section circles of the measured cylinder. in: ...

Embodiment 2

[0099] This embodiment exemplifies a specific implementation of the method for measuring the straightness of the line connecting the centers of the multi-section circles of a cylinder.

[0100] The dimensions of the cylinder to be measured are figure 2 As shown in the figure, a CMM with a specification of (900×1200×800) mm and an indication error of (1.9+3L / 1000) μm is used. The instrument model is Hexagon Global Image, and Φ4×40mm A0°B0 is used. °Ball probe, measure the outer diameter and roundness of the five sections A, B, C, D and E and the straightness of the line connecting the centers of the outer diameters of these five sections.

[0101] The specific process is:

[0102] 1. Establish a coordinate system for the upper half-axis of the cylinder to be measured for measurement.

[0103] Use Φ4×40mm A0°B0° ball probe to measure a semi-cylinder at 20 points on each of the five sections of the upper half-axis A, B, C, D, and E of the cylinder to be measured, and then the ...

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Abstract

The invention belongs to the field of machining, and particularly relates to a measuring device and method for measuring the straightness of a cylinder through a three-coordinate measuring machine. The measuring device comprises a special auxiliary measuring device which comprises a positioning seat, a positioning sphere and a positioning rod connected between the positioning seat and the positioning sphere, and the special auxiliary measuring device is fixed at a specified position on the end face of one side of a measured cylinder; the three-coordinate measuring machine comprises a workbench used for positioning the measured cylinder, a ball measuring head used for obtaining coordinate values of all points of the measured cylinder / positioning ball, and a three-coordinate moving assembly used for driving the ball measuring head to move. By utilizing the three-coordinate measuring machine and the special auxiliary measuring device, when the straightness of the multi-section circle center connecting line of a cylinder of which the length is close to the axial measuring range of the three-coordinate measuring machine is measured, the difficulty in measuring the straightness of the multi-section circle center connecting line of the cylinder is solved, and the straightness, the outer diameter and the roundness of the multi-section circle center connecting line of the cylinder are quickly measured; and the measurement precision and accuracy are ensured.

Description

technical field [0001] The invention belongs to the field of machining, and in particular relates to a measuring device and method for measuring the straightness of a cylinder by a three-coordinate measuring machine. Background technique [0002] As a large-scale precision measurement equipment integrating light, machine and electricity, CMM has the advantages of large measurement range, high measurement accuracy, high work efficiency, good performance, and powerful measurement software functions. It is widely used in machinery manufacturing. , Instrument manufacturing, electronics, automotive and aviation industries, used for the measurement of the geometric dimensions and shape and position errors of parts and components. [0003] Straightness is one of the measurement items of shape and position error, and the CMM has the function of measuring straightness error. At present, one method of measuring the straightness of a cylinder with three coordinates is to measure the g...

Claims

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Application Information

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IPC IPC(8): G01B21/24
CPCG01B21/24
Inventor 张云江刘红王超姚江伟张桂芬曹昆武叶瑞夺
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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