Floating clamp for honing connecting rod big end hole

Abstract

The invention discloses a floating clamp for honing a connecting rod big end hole. The floating clamp comprises a base, a fixed guide sleeve, a floating plate, an end face positioning sleeve, a positioning device, a pneumatic clamping mechanism and a square cover plate. The fixed guide sleeve is of a central through hole structure and penetrates through the upper part of the base. The floating plate is connected to the upper portion of the base in a floating mode, and the floating plate can automatically adjust the center of the big end hole when the big end holeis honed. The end face positioning sleeve is of a central through hole structure and penetrates through the middle of the floating plate, the end face positioning sleeve and the fixed guide sleeve are coaxial, and the end face positioning sleeve is used for positioning the lower end face of a workpiece. The positioning device is arranged on the floating plate and is used for positioning a workpiece. The pneumatic clamping mechanism is arranged at the upper part of the floating plate and is used for clamping the workpiece. And the square cover plate is fixedly connected to the top of the floating plate. According to the clamp, shape errors during honing of the big end hole can be reduced, the size and cylindricity of the big end hole and the perpendicularity of the two end faces to the center line of the big end hole are well guaranteed, and abrasion of a connecting rod during working is relieved.

Description

technical field [0001] The invention relates to the technical field of fixtures for machining machine tools, in particular to a floating fixture for honing the big end hole of a connecting rod. Background technique [0002] At present, in the existing technology, the connecting rod parts of automobile engines are mainly formed by forging the overall blank, quenching and tempering (that is, the comprehensive heat treatment process of quenching and high temperature tempering), and machining. The impact alternating tension and compression loads and bending alternating loads generated by the reciprocating swing inertia force should have sufficient strength and rigidity. In order to obtain good performance, very high technical requirements are usually formulated when machining connecting rods, such as the center distance error of the connecting rod's big and small head holes, the distance tolerance between the two ends of the connecting rod's big and small heads, etc. [0003] I...

AI Technical Summary

Problems solved by technology

Among them, the honing of the big head hole is usually processed by a double-sided vertical honing machine, but the shape error is relatively large when the existing fixture is used to honing the big head hole, the size and cylindricity of the big head hole are difficult to meet the requirements, and the processing yield is not high. , and the verticality error between the two ends of the big head hole facing the center line of the big head hole is relatively large, which will easily cause wear between the two ends of the big end of the connecting rod and the two ends of the crankshaft connecting rod journal, and even cause the hidden danger of burns

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