Novel connecting rod small end processing technique

A technology of connecting rod small end and processing technology, which is applied in the field of new connecting rod small end processing technology, to achieve the effects of improving efficiency, reducing production cost and reasonable processing technology design

Inactive Publication Date: 2020-05-15
YULIN CHENGXIN MACHINERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Novel connecting rod small end processing technique
  • Novel connecting rod small end processing technique

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Embodiment Construction

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0018] See figure 1 As shown,

[0019] The present invention provides a technical solution:

[0020] The processing technology of the new connecting rod head includes the following steps:

[0021] (1). The large-head hole 3 machined on the connecting rod blank is a round hole, and the connecting rod blank with the large-head hole is separated into two parts: connecting rod body and connecting rod cover by means of breaking. The mating surface of the rod cover 2 is an...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 覃东强朱展才谢科吕伟源
Owner YULIN CHENGXIN MACHINERY CO LTD
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