A processing device and method for improving surface roughness and flatness of large external threads

Abstract

The invention provides a machining device and method for improving the roughness and the flatness of the surface of a large external thread. The machining device is composed of a scraping knife head, a machining blade and a knife body. It must be guaranteed that the scraping knife head and the external thread to be machined are completely matched or similar in shape. The knife body is fixedly connected with the scraping knife head. The machining blade is fixedly connected with the scraping knife head through a pressing nail. The machining method of the machining device comprises the steps that the knife body is horizontally installed on a numerical control lathe tool rest in a clamping mode, the scraping knife head directly faces the surface of the external thread to be machined, the horizontal position of the scraping knife head is adjusted by the range within 0.01 mm and the scraping knife head is made to be matched with the external thread to be machined while the X shaft and the Z shaft are biased, at the moment, a Z value is biased to guarantee the fact that the feeding quantity is 0.01-0.02 mm every time the machining blade rotates by a circle, and after setting is completed, running is conducted according to a circulation program provided by a numerical control lathe. The machining device and method have the advantages that forming is realized through cut at a time, knife marks are reduced, the working efficiency is improved and lathe resources are saved.

Description

technical field [0001] The invention relates to a processing device and method for processing the surface roughness and flatness of external threads, in particular to a processing device and method for improving the surface roughness and flatness of large external threads, belonging to the field of mechanical processing. technical background [0002] At present, the technology for large-scale thread processing is not perfect. The traditional method uses standard groove cutters for turning. During finishing, the speed is 8-10n / min, the feed per revolution is 0.2-0.25mm, and the depth of cut is 0.1-0.2mm , due to casting defects (trachoma, shrinkage cavity) in the workpiece, it needs to be repaired by welding. The hardness after repair is 280-320HB. When turning to the hard point, the knife and blade chipping will occur, resulting in inconsistency in flatness and roughness of the blade after chipping. Poor, but it takes 4 hours for one cut of finishing turning, and 8-10 cuts n...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a processing device and method for improving the surface roughness and flatness of large external threads, which solves the problem of complex and difficult processing of large external thread roughness and flatness

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