Machining method for correcting large-diameter thread

• Main Authors: LIU XIAOPENG, CHAI JINBAO, QI ZENGXING, LIU SHUQIAN, ZHANG XIAOBIN, XIAO QI, WANG KAI, ZHANG QUANZHI, ZHAO QI, LIU BENLING
• Format: Patent
• Language: Chinese; English
• Published: 07.01.2022
• Subjects: MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; THREAD CUTTING; TRANSPORTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTIONTHEREWITH

The invention provides a machining method for correcting a large-diameter thread. The machining method comprises the following steps of: S1, a raw material is machined into a semi-finished product of a bolt or a screw through single piece machining of a punching machine or continuous machining of a cold header; S2, the semi-finished product of the bolt or screw is subjected to heat treatment; S3, the diameter of a thread rolling blank is machined in a machining mode such as turning or grinding; and S4, through a thread rolling machine, a thread rolling wheel is corrected through MOD, rolling forming of the external thread of the bolt or the screw is achieved, and the thread size precision is guaranteed. According to the machining method for correcting the large-diameter thread, large-diameter correction and thread preparation are combined, machining time and machining cost are reduced, labor of workers is reduced, and compared with a large-diameter grinding method in the prior art, the metal streamline of the