Novel connecting rod small end processing technique

Abstract

The invention relates to the technical field of engine connecting rod processing, in particular to a novel connecting rod small end processing technique. The novel connecting rod small end processingtechnique is characterized by comprising the following steps: (1) enabling a big end hole processed in a connecting rod blank to be a circular hole, and separating the connecting rod blank processed with the big head hole into a connecting rod body and a connecting rod cap in a cracking manner; (2) performing semi-finish boring of a small end hole; (3) performing finish milling of the small end bored hole; (4) grinding and trimming the small end bored hole; (5) performing inspection. The novel connecting rod small end processing technique completely achieves the development purpose, and is reasonable in design and accurate in position-fixing. The qualified rate of the processed small end holes of connecting rods is increased from 15% of existing traditional processing to more than 97%, andis increased by more than five times. The novel connecting rod small end processing technique has the advantages of reducing the production cost, improving the anti-fatigue lives of the connecting rods, ensuring the lubrication performance of elliptical holes of the connecting rods, fulfilling the requirement of mass production, solving a difficult technical problem in the industry, and satisfying the processing demand of the small end holes of the connecting rods.

Description

Technical field [0001] The invention relates to the technical field of engine connecting rod processing, in particular to a novel connecting rod small end processing technology. Background technique [0002] The connecting rod is one of the key components of the engine, mainly composed of a big end, a shaft, and a small end. The connecting rod transmits the power of the piston to the crankshaft, so that the reciprocating movement of the piston is converted into the rotational movement of the crankshaft. During engine operation, the gas pressure and inertial force on the piston act on the connecting rod hole through the piston pin in the form of a dynamic distributed load, so the connecting rod hole mainly bears alternating tension and compression loads. Due to the huge explosive pressure, not only the piston pin will be bent and deformed, but also the connecting rod hole will also be deformed. This will cause the load to concentrate on the outside of the connecting rod hole. The...

AI Technical Summary

Problems solved by technology

At present, there is no domestic mature report on the processing technology of the elliptical hole at the small end of the connecting rod. According to the market demand, we must solve this technical problem.

Images