Method for manufacturing cutter shafts of longitudinally-shearing disc scissors

Abstract

The invention provides a method for manufacturing cutter shafts of longitudinally-shearing disc scissors. The method includes the steps of material selection, rough machining, thermal treatment, center hole lapping, external circle accurate grinding, polishing and combination of a reasonable thermal treatment procedure (quenching and tempering, high-temperature tempering, low-temperature tempering and oil boiling), surface nitrogen treatment, a three-time center hole lapping and grinding technology (rough grinding, semi-accurate grinding, rounding, accurate grinding and fine grinding) and a grinding and polishing technology, so that the longitudinally-shearing disc scissors is in a high accuracy state in the process of production, a machining and manufacturing technical method without deformation and abrasion is conducted, through technological innovation of a measurement method and bold development of a measurement instrument in the manufacturing process, the high-accuracy cutter shafts of the longitudinally-shearing disc scissors are measured through a pneumatic measurement instrument according to the comparative measurement method, and the error of the two cutter shafts with the diameter absolute error within 0.002 mm is measured. By the adoption of the high-accuracy cutter shafts manufactured through the method and the technological process, key indexes such as the diameter tolerance and the roundness of the cutter shafts can reach and even exceed technical indexes of cutter shafts of import disc scissors.

Description

technical field [0001] The invention relates to a high-precision cutter shaft technological scheme and flow in steel rolling equipment, in particular to a manufacturing method of a slitting disc scissor shaft. Background technique [0002] The slitting disc shear is the core equipment of the finishing production line that cuts the wide strip longitudinally into multiple narrow strips through multiple pairs of disc shearing blades. No more than 0.002mm, the minimum lateral clearance of the cutting edge is 0.015mm. In the past 30 years and after liberation, the silicon steel factories built in New China have always relied on imports for the production of high-grade oriented silicon steel and non-oriented silicon steel. ) cannot be localized. [0003] The development direction of cold-rolled silicon steel is to develop towards ultra-wide (≥1200mm) and extremely thin (0.23-0.18mm), which determines the length of the working part of the cutter shaft; The tool of self-locking c...

AI Technical Summary

Problems solved by technology

For diameter tolerance, the accuracy of measuring instruments such as conventional vernier calipers and micrometers cannot meet the requirements; the measurement accuracy of three-coordinate measuring instruments that comprehensively apply advanced technologies such as optics, electronic technology, and computer technology can neither meet the requirements nor be suitable. On-site measurement, that is to say, traditional measurement methods and measuring instruments using mechanical manufacturing cannot meet the requirements

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