Embrittling splitting and clamping device used for connecting rod cap and connecting rod body with high strength and toughness steel

Abstract

Provided is an embrittling splitting and clamping device used for a connecting rod cap and a connecting rod body with high strength and toughness steel. The embrittling splitting and clamping device used for the connecting rod cap and the connecting rod body with high strength and toughness steel is characterized by comprising a base plate, a positioning sleeve, a positioning pin, a fixed taper-lock, fixed clamping chucks, a slipway, a movable taper-lock, an expansion rod, movable clamping chucks and a reset mechanism, wherein the positioning sleeve is longitudinally arranged on the upper surface of the base plate; the positioning pin is arranged on the positioning sleeve and is provided with the periphery surface which is sleeved with a connection rod smaller head; the slipway is arranged on the base plate in a horizontally moving mode; a first wedge surface is formed in the interior of the movable taper-lock and formed in the slipway, the movable taper-lock is matched with the fixed taper-lock to form a taper-lock assembly, and the taper-lock assembly is longitudinally hollow and is provided with the periphery surface which is sleeved with a positioning connection rod larger head; the expansion rod is longitudinally arranged in the taper-lock assembly and provided with a second wedge surface which is matched with the first wedge surface of the movable taper-lock. Compared with the prior art, the embrittling splitting and clamping device used for the connecting rod cap and the connecting rod body with high strength and toughness steel has the advantages that the whole clamping device structure is simple in structure, easy to manufacture and relatively low in cost.

Description

technical field [0001] The invention relates to an expansion clamping device, in particular to an embrittlement expansion clamping device for a connecting rod cover and a connecting rod body, belonging to the technical field of vehicle engine parts processing. Background technique [0002] With the rapid development of the automobile industry and the increasingly fierce competition, automobile manufacturers have higher and higher requirements for the design and manufacture of auto parts, and automobile engine technology has always been regarded as the core technology of the automobile industry. The connecting rod is an important part of the engine, and it is the link that converts the linear reciprocating motion of the piston into the rotary motion of the crankshaft. During the working process of the engine, the connecting rod not only bears the assembly load (including bearing bush interference and bolt pre-tightening force), but also needs to transmit the gas explosion pre...

AI Technical Summary

Problems solved by technology

The cylindricity of the big head hole of the third-generation tank connecting rod is required to be less than φ0.006mm, which requires that the positioning accuracy of the connecting rod cover and the connecting rod body must reach the level of 0.001mm. For the connecting rod processed by traditional technology, the positioning of the connecting rod cover and the connecting rod body There is always a certain error, and the residual stress remains in the connecting rod assembly after the connecting rod cover and connecting rod body are assembled

[0005] After the connecting rod is processed, the connecting rod cover must be disassembled when it is sent to the assembly line for assembly with the crankshaft. At this time, the residual stress is released, which will cause deformation of the big end hole of the connecting rod, which will affect the performance of the engine after installation.

[0006] At present, in order to eliminate the positioning error and avoid this phenomenon, the 7-10 processes in the processing of the joint positioning surface of the connecting rod cover and the connecting rod body are combined into one process, which requires a lot of manpower and material resources, which seriously hinders the improvement of production efficiency.

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