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Manufacturing process of internal combustion engine connecting rod

A manufacturing process and internal combustion engine technology, applied in the direction of connecting rods, mechanical equipment, shafts and bearings, etc., can solve the problems of non-dense internal chemical composition, uneven structure of connecting rod blanks, large deviations, etc., and achieve good breaking effect, Effects of increasing stiffness and increasing preload

Inactive Publication Date: 2018-12-18
全椒县全动机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention proposes that the rigidity, strength, plasticity and toughness of the connecting rod blank can be improved by heat treatment of the casting connecting rod blank, and at the same time, the internal structure of the connecting rod blank can be improved. to improve the physical properties of connecting rod blanks

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  • Manufacturing process of internal combustion engine connecting rod
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Embodiment Construction

[0036] In order to make the technical means, objectives, and effects of the invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0037] A kind of internal combustion engine connecting rod manufacturing process

[0038] Step 1: casting blank

[0039] Select the metal solution of 40Cr alloy steel and add it into the casting mold, put the powder material in the connecting rod cover and connecting rod body in the cavity of the casting mold, so that the powder material and the metal solution form a fracture after casting and water cooling The limit is to make a connecting rod blank, the casting molding error is less than 0.6 mm, the casting molding temperature is 1200 degrees Celsius, the casting molding time is 1.4 hours, the water cooling temperature is 20 degrees Celsius, and the cooling time is 50 minutes;

[0040] Step 2: Heat Treatment

[0041] First heat the connecting rod to 600 degrees Celsius, he...

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Abstract

The invention provides a manufacturing process of an internal combustion engine connecting rod. The manufacturing process comprises the following steps of blank casting, heat treatment, milling treatment, rough grinding, drilling and broaching, machining of bolt holes, expansion fracture treatment, finish machining of a large-end hole and a small-end hole, and end face finish machining. By conducting heat treatment on a connecting rod blank formed through casting, the rigidity, strength, plasticity and toughness of the connecting rod blank can be improved, meanwhile, the problems that an internal structure of the connecting rod blank is uneven and uncompact, and inner chemical composition deviation is large can be solved, the physical properties of the connecting rod blank are improved, through the fracture limit formed by adding metal powder into a mold cavity before casting forming, the good expansion fracture effect on the large end of the connecting rod during expansion fracture treatment and separation at the later stage can be achieved easily, the problems of cracking and breakage of an expansion fracture port are avoided, the expansion fracture treatment efficiency is improved, and the yield of finished products is increased.

Description

technical field [0001] The invention relates to the field of manufacturing internal combustion engines, in particular to a manufacturing process for connecting rods of internal combustion engines. Background technique [0002] The connecting rod is the main moving component of the internal combustion engine. The function of the connecting rod is to transmit the force borne by the piston to the crankshaft, and to convert the reciprocating motion of the piston into the rotational motion of the crankshaft. The connecting rod is mainly composed of a connecting rod body, a connecting rod head and a connecting rod The small head of the rod and the connecting rod bolt (or screw), etc., the connecting rod must not only have high tensile and compressive strength and high fatigue strength, but also have sufficient rigidity and toughness. [0003] The existing internal combustion engine connecting rod processing technology is prone to insufficient strength of the processed connecting r...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/00F16C7/02
Inventor 尤建国
Owner 全椒县全动机械有限公司
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