Method and device for machining eccentric hole of crank

• Main Authors: TANG XIAOJUN, WANG ZHANFENG, LU JINZHONG, BU XINGYU, LUO KAIYU
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2023
• Subjects: COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT; COMBINED OPERATIONS; DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; TRANSPORTING; UNIVERSAL MACHINE TOOLS

According to the method and device for machining the eccentric hole of the crank, the end face of a base of a crank workpiece (8) and the outer cylindrical face connected with the end face (10) serve as positioning faces, and three moving freedom degrees and two rotating freedom degrees of the crank workpiece (8) are limited through two positioning elements including an upper V-shaped block (8), a lower V-shaped block (11) and an end cover; in this way, the crank workpiece (8) can be accurately and reliably positioned, the positioning precision is high, installation is convenient, and the machining efficiency is improved. The outer cylindrical surface is directly used as a clamping surface, so that two working steps of surface milling and drilling can be completed through one-time clamping; and a symmetrical wedge clamping mechanism is utilized, the function of automatically positioning the circle center is achieved, and the clamping accuracy is guaranteed. 本发明提供了一种加工曲柄偏心孔的方法及其装置，它的曲柄工件（8）底座端面以及与端面（10）连接的外圆柱面