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Method for detecting size of part and device

A technology of parts and size, applied in measuring devices, optical devices, instruments, etc., can solve problems such as large numerical errors, and achieve the effect of improving production efficiency and simple detection process

Inactive Publication Date: 2011-05-25
苏州江城数控精密机械有限公司
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Problems solved by technology

[0003] In the traditional detection of part size, it is necessary to locate a reference plane first, and obtain the data of the measured workpiece through comparison or relative detection. However, due to the unevenness of the reference plane or rough surface, the numerical error detected by comparison larger

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  • Method for detecting size of part and device

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Embodiment Construction

[0027] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0028] A method for detecting the size of a part, comprising the steps of:

[0029] Place the part on the detection platform 1 so that the length of the part is parallel to the X axis, the width of the part is parallel to the Y axis, and the height of the part is parallel to the Z axis, and the part is clamped by a fixture; The detection head travels synchronously, and the length of the part is determined by the change of the light reflection amount detected by the detection head during the movement of the detection head along the X-axis, and the light reflection amount detected by the detection head during the movement of the detection head along...

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Abstract

The invention provides a method for detecting size of a part. The method comprises the following steps: placing the part on a detecting platform to ensure the part to be parallel to the X axis in the length direction, parallel to the Y axis in the width direction and parallel to the Z axis in the height direction and clamping the part with a clamp if the form and position tolerance is detected; and moving upper and lower detecting heads arranged along the Z axis synchronously, determining the initial and final positions of the length of the part through variation of light reflection detected by the detecting heads in the process that the detecting heads move along the X axis, determining the initial and final positions of the width of the part through variation of light reflection detected by the detecting heads in the process that the detecting heads move along the Y axis and computing the height of the part through the distances, which are measured by the two detecting heads respectively, between the two detecting heads and the corresponding points on the part in the Z axis direction. By adopting the method and the device, the system errors which are easy to occur in the process of detecting the size of the part can be effectively reduced.

Description

technical field [0001] The invention relates to a method for detecting the size of parts and an applied device. Background technique [0002] There are many technical requirements for mechanical parts, including geometric shape, dimensional tolerance, shape and position tolerance, surface roughness, chemical composition and hardness of materials, etc. Where to start when testing, which measuring tools to use, and what advanced methods to use are highly technical issues in testing. During the detection process, there are many factors that affect the accuracy of the obtained data. Detection errors can be divided into three categories: random errors, gross errors, and systematic errors. The method of eliminating random errors is mainly to eliminate the source of errors (reduce temperature fluctuation, control detection force, etc.), and the size of random errors can also be estimated according to the normal distribution probability. Detection values ​​with gross errors are c...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/02
Inventor 沈平
Owner 苏州江城数控精密机械有限公司
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