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Large-ball grinding trace feature image capturing device and sphericity judgment method

A technology of spherical grinding and discriminative method, which is applied in the direction of grinding machine tool parts, grinding/polishing equipment, metal processing equipment, etc., and can solve the problems that real-time detection cannot be realized

Inactive Publication Date: 2014-12-03
SHANGHAI JIAO TONG UNIV
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  • Description
  • Claims
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Problems solved by technology

However, this dedicated CNC spherical grinding machine can only be used for the detection of the spherical diameter of the sphere, and cannot realize the real-time detection of the shape accuracy (sphericity) of the ground sphere 1 during the grinding process.

Method used

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  • Large-ball grinding trace feature image capturing device and sphericity judgment method

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Embodiment Construction

[0035] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment provides detailed implementation methods and specific operating procedures on the premise of the technical solution of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0036] Such as figure 1The precision grinding process system for a large-scale high-hardness, high-precision sphere is shown. In the XOYZ rectangular coordinate system, the sphere 1 to be ground is supported by the spindle system and the tailstock system of the machine tool and rotates around the X coordinate axis. The cup-shaped grinding wheel grinds The tool is set under the ball to be ground 1 and rotates around the Z coordinate axis. The grinding wheel and the grinding tool 2 are fed from the bottom to the top. The generative motion synthesized by the horizontal rotation motion realizes the preci...

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Abstract

The invention discloses a large-ball grinding trace feature image capturing device and a sphericity judgment method. The image capturing device comprises a CCD (charge coupled device), an image capturing card and a computer system. The sphericity judgment method includes firstly capturing images of ball grinding trace features of a ball to be ground by the CCD and the image capturing card, identifying characteristics of the captured images of the ball grinding trace features in the computer system and judging sphericity of the ball to be ground in real time; judging that the sphericity of the ball to be ground conforms to the requirement if the ball grinding trace features are in orthogonal state, otherwise, judging that the sphericity of the ball to be ground does not conform to the requirement if the ball grinding trace features are raised or recessed in a single direction. Shape accuracy in large-ball precise grinding is detected and judged in real time, and basis is created for in-place automatic compensation of sphericity error of ball grinding.

Description

technical field [0001] The invention relates to a detection device and method for spherical processing, in particular to a large-scale spherical grinding trace topography image acquisition device and a sphericity discrimination method, belonging to the technical field of mechanical processing. Background technique [0002] Large high-hardness, high-precision spheres are key components in fluid and gas control devices (such as large hard-sealed ball valves) in major energy projects such as petrochemical, coal chemical, and photovoltaic power generation. At present, the diameter of high-hardness spheres of foreign large-scale hard-sealed ball valves has reached Φ1000mm, and the surface hardness has reached above HRC70. Due to the tightness requirements, the surface roughness and spherical shape accuracy (sphericity) requirements of this sphere are very high. Large-area, high-hardness, high-precision precision machining technology has become a key technology that has been widel...

Claims

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Application Information

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IPC IPC(8): B24B49/00
CPCB24B49/02
Inventor 胡德金胡晓冬
Owner SHANGHAI JIAO TONG UNIV
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