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Machining Technology of Engine Connecting Rod Expansion-breaking Method

An engine connecting rod and processing technology, applied in the field of engine connecting rod expansion and breaking method processing technology, can solve the problems of dislocation of the connecting rod big end hole, poor matching accuracy, affecting the assembly and use of the engine, etc., to ensure quality and simplify processing. Process, the effect of omitting the processing process

Active Publication Date: 2019-04-26
BEIJING BEINEI DIESEL ENGINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the matching accuracy between the bolt hole and the bolt is not good, it will cause the misalignment of the big head hole of the connecting rod, which will affect the assembly and use of the engine.

Method used

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  • Machining Technology of Engine Connecting Rod Expansion-breaking Method
  • Machining Technology of Engine Connecting Rod Expansion-breaking Method
  • Machining Technology of Engine Connecting Rod Expansion-breaking Method

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Embodiment Construction

[0035] Below, combine Figure 1-5 , the present invention will be further described.

[0036] Material selection of connecting rod: At present, the commonly used material of engine connecting rod is 40Cr steel. Due to the structure and performance of this material, the connecting rod body 1 and connecting rod cover 2 are separated by the expansion fracture method. Under the action, the plastic deformation is large, and the big head hole is out of round, which hinders the implementation of the expansion breaking method. The material of the connecting rod used in the present invention is C70S6BY high-carbon micro-alloy non-quenched and tempered steel. This steel can not only ensure that the forgings have sufficient strength after air cooling, and meet the needs of the performance of the connecting rod. Under the premise of the index, it shows the characteristics of brittle fracture, and the fracture surface has good meshing. Due to the characteristics of the fracture surface, ...

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Abstract

The invention relates to a cracking method machining technology of an engine connecting rod. A large-end hole machined in a connecting rod blank is a round hole; the connecting rod blank where the large-end hole is machined is separated into a connecting rod body and a connecting rod cover in a cracking manner; the joint faces of the connecting rod body and the connecting rod cover are cracking faces which are not subjected to cutting machining; and connecting and locating between the connecting rod body and the connecting rod cover are achieved through engagement of the joint faces of the connecting rod body and the connecting rod cover. A connecting rod cracking device for connecting rod cracking comprises a vertical rack and a workbench mounted on the vertical rack, and further comprises an upper machine head and a lower machine head. The upper machine head is provided with an upper wedge part and an upper cracking pushing force mechanism used for driving the corresponding wedge part to move up and down, and the lower machine head is provided with a lower wedge part and a lower cracking pushing force mechanism used for driving the corresponding wedge part to move up and down. Extrusion force formed by opposite movement of the upper edge part and the lower wedge part is used for achieving connecting rod cracking. By means of the method of the technology, the cracking difficulty is reduced, the quality of the connecting rod obtained after cracking is guaranteed, production procedures and manufacturing cost are reduced, and good economical benefits are achieved.

Description

technical field [0001] The invention relates to a processing method of an engine connecting rod, specifically, a connecting rod processing method in which a connecting rod (blank) is separated into two parts of a connecting rod body and a connecting rod cover by a splitting method, and is suitable for use in Manufacturing and processing of various automotive engine connecting rods such as 484 water-cooled diesel engines and other similar workpieces. Background technique [0002] The connecting rod is an important part in the automobile engine. It connects the piston and the crankshaft. Its function is to convert the reciprocating motion of the piston into the rotational motion of the crankshaft, and transmit the force acting on the piston to the crankshaft to output power. When the connecting rod is working, in addition to bearing the pressure generated by the gas in the combustion chamber, it also bears longitudinal and transverse inertial forces. Therefore, the connecting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 王国民牟广文王德生
Owner BEIJING BEINEI DIESEL ENGINE
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