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Method for detecting optical photograph of large mold casting blank

A technology of optical photography and detection methods, applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problems of tool wear, long inspection time, and decreased accuracy of processing equipment, so as to reduce cost consumption, speed up production cycle, The effect of improving operating time

Inactive Publication Date: 2014-01-15
CHINA FIRST AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After alignment, check the machining allowance of the casting through the test tool of the machine tool. The inspection time for large workpieces is very long, and it is easy to miss. Occasionally, there will be tool collision, tool wear, workpiece scrapping, and the accuracy of processing equipment will decrease, which will increase the cost while affecting the production cycle of the workpiece.

Method used

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  • Method for detecting optical photograph of large mold casting blank
  • Method for detecting optical photograph of large mold casting blank
  • Method for detecting optical photograph of large mold casting blank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Such as figure 1 As shown, the entity of casting 1 should be opened before work to fully confirm the shape, size, processing area, non-processing area and related structural positions of the entity. Then paste the processing surface, interference surface, boss formed in the casting process and the peripheral non-processing surface of the workpiece 2; collect data on all the processing surfaces of the casting blank; ensure that the final data deviation of the collection points is less than 0.5 pixels , the scale deviation is less than 0.15mm, and there are about 1000 points on this casting. After posting point 2, check the entire casting, and find out if there is any omission, and supplement it.

Embodiment 2

[0014] Such as figure 2 As shown, the entity of casting 1 should be opened before work to fully confirm the shape, size, processing area, non-processing area and related structural positions of the entity. Then paste the processing surface, interference surface, boss formed in the casting process and the peripheral non-processing surface of the workpiece 2; collect data on all the processing surfaces of the casting blank; ensure that the final data deviation of the collection points is less than 0.5 pixels , the scale deviation is less than 0.15mm, and there are about 1000 points on this casting. After posting point 2, check the entire casting, and find out if there is any omission, and supplement it.

Embodiment 3

[0016] Such as image 3 As shown, the entity of casting 1 should be opened before work to fully confirm the shape, size, processing area, non-processing area and related structural positions of the entity. Then paste the processing surface, interference surface, boss formed in the casting process and the peripheral non-processing surface of the workpiece 2; collect data on all the processing surfaces of the casting blank; ensure that the final data deviation of the collection points is less than 0.5 pixels , the scale deviation is less than 0.15mm, and there are about 1000 points on this casting. After posting point 2, check the entire casting, and find out if there is any omission, and supplement it.

[0017] Determine the alignment datum of NC machining, input the CAD data into the alignment environment with the die center coordinate system, and ensure the same datum as the NC machining to create a coordinate system for the collected data in 3-2-1, requiring the flatness of...

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Abstract

The invention relates to a method for detecting an optical photograph of a large mold casting blank. The method is characterized in that a lug boss and a peripheral unfinished surface formed by a workpiece are subjected to bulge application; all processing molding surfaces are subjected to data acquisition; a system is established for acquired 3D points, and is compared with the prior theory three-dimensional design data; finally, a digital control processing alignment standard report is released. Under a report chart environment, each direction required in digital control processing is standardized, generally, display of the standard is required to be determined by trial cutting on a machine tool, and theoretical coordinate values, offset directions and dimensions of the coordinates are displayed to be used for digital control processing alignment and standard determination. The method accurately determines the digital control processing standard, reduces load of the machine tool and time for aligning the center by digital control equipment, and accelerates cycle of cast output. A digital control programming staff can reasonably program a digital control processing program through allowance deviation data, thereby improving effective operation time of the digital control machine tool, reducing consumption of cost, improving working efficiency of digital control processing while ensuring the quality of digital control processing, and accelerating the output cycle of cast blank.

Description

technical field [0001] The invention relates to an optical photographic detection method for a large mold casting blank, which uses optical detection equipment to detect the remaining amount of the large mold casting blank. technical background [0002] With the improvement of the quality of mold products and the acceleration of production progress, there are higher requirements for the processing quality and production cycle of castings. However, in the past, castings were directly put on the CNC machine tool, and the center was found through the CNC machine tool to determine the CNC machining benchmark. This process takes a long time. After alignment, check the machining allowance of the casting through the test tool of the machine tool. The inspection time for large workpieces is very long, and it is easy to miss. Sometimes there will be tool collision, there will be tool wear, workpiece scrapping, and the accuracy of processing equipment will decrease, which will increa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/24
Inventor 单堃李悦姚胜谢韬
Owner CHINA FIRST AUTOMOBILE
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