Device and method for fast alignment of datum in NC machining of non-regular shape structure wool

Abstract

The invention relates to a quick alignment unit of a numerical control machining datum for irregular-appearance rough materials. A support plate is disposed on a milling fixture, a positioning device is disposed in the lengthwise direction of the support plate, a quick alignment device is disposed at one width-wise end of the support plate, a press plate is disposed at the other width-wise end of the support plate, and the end of the press plate is disposed above the support plate. Both the positioning device and the press plate are movably connected with the milling fixture. The quick alignment device comprises a quick aligner, two cylindrical positioning pins and a plurality of tapered alignment pins. The tapered alignment pins are disposed on the upper bent surface of the quick aligner. Bottom tips of the tapered alignment pins are evenly distributed on an outline, to be machined, of a casting to be machined. Two cylindrical positioning pins are arranged on the lower bent surface of the quick aligner and fit two through holes at the corresponding positions of the milling fixture. A round tool-setting block is disposed at a certain fixed position of the milling fixture. The quick alignment unit has the advantages that the numerical control datum can be quickly aligned by the alignment unit directly through any scribed irregular shapes as datum references.

Description

technical field [0001] The invention relates to a quick alignment device and a method for numerical control machining of wool with irregular shape structure, belonging to a machining alignment method. Background technique [0002] The present invention is a further development on the basis of the patented technology of "a rapid alignment device and alignment method for numerical control technician benchmarks", its publication number is CN102320021A, and the publication date is January 18, 2012. Based on the cross scribe line, two positioning pins are used to quickly align them, and some casting parts with irregular shape features cannot be accurately marked with the cross datum, and can only be marked by scribing lines. Outline, in this case, the fast alignment of the NC datum cannot be achieved. At present, when aligning the NC machining datum of casting parts with irregular shape features, the accurate alignment of the machining datum cannot be achieved. Generally, it is ...

AI Technical Summary

Problems solved by technology

[0002] The present invention is a further development on the basis of the patented technology of "Numerical Control Technician Standard Quick Alignment Device and Alignment Method". Its publication number is CN102320021A, and its publication date is January 18, 2012. On the basis of the cross mark, two positioning pins are used to quickly align them. However, for some casting parts with irregular shape features, the cross reference cannot be accurately marked, and the parts can only be drawn by scribing. Outline, in this case can not achieve the fast alignment of the numerical control benchmark

At present, it is impossible to achieve accurate alignment of the machining datum when NC machining datum alignment of casting parts with irregular shape features. Generally, it is necessary to leave a machining allowance for the shape that needs NC machining for trial cutting, and then check the machining allowance Whether it is uniform or not, readjust according to the machining allowance status and the most numerical control machining benchmark, and then perform trial cutting until the machining allowance is uniform, resulting in low processing efficiency and the risk of scrapping due to uneven machining allowance of castings

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