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Machining process of engine connecting rod

A technology of engine connecting rod and processing technology, applied in the field of processing technology of internal combustion engine connecting rod, can solve problems affecting the quality and use of connecting rods, time-consuming joint surface processing, large assembly errors, etc., to save processes and prevent crankshaft hole accuracy The effect of error and accuracy improvement

Inactive Publication Date: 2009-06-03
ZHEJIANG YUEJIN MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned processing method has certain disadvantages, such as the processing of the joint surface is very time-consuming, and due to the limitation of sawing and grinding precision, the connecting rod formed by connecting the connecting rod cover and the connecting rod body is affected by the tension torque of the bolt. And the shape of the joint surface of the cover is easy to cause interchange, and there is a large assembly error, which affects the quality and use of the connecting rod

Method used

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  • Machining process of engine connecting rod
  • Machining process of engine connecting rod
  • Machining process of engine connecting rod

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specific Embodiment approach

[0017] A processing technology for an engine connecting rod, which includes the following steps: forging and pressing a billet, cutting, and the raw material is high-carbon non-quenched and tempered steel C70S6; the main process of forging and pressing a billet: blanking; heating, the heating temperature is 1150 ° C, and the temperature is control ±50℃; billet making; pre-forging, final forging, pre-forging temperature is 1100 ℃, end forging temperature ≥ 930 ℃; edge trimming, punching, shaping, normalizing, and forced cooling with strong cooling, so that the forging The temperature drops below 600°C within 10 minutes; then cutting is carried out after flaw detection and strong shot blasting.

[0018] The purpose of normalizing is to obtain evenly distributed flaky pearlite and ferrite with a percentage of no more than 10% in the forging, that is, the fracture surface is magnified 100 times with a microscope, and the area seen has no more than 10% ferrite. White ferrite with a...

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Abstract

The invention discloses a machining technology of an engine connecting rod. The machining process comprises the following steps: forging, blank making and cutting, and taking high carbon non-hardened steel as a raw material; main procedures of the forging and blank making: blanking, heating, blank making, blocker forging, finish forging, trimming, punching, normalizing after shaping, and forced cooling in a forced cooling mode so as to reduce the temperature of a forging parts below 600 DEG C in 10min; cutting after defect detection and powerful shot blasting; the main procedures of the cutting: coarsely grinding or milling two end faces, roughly boring a big head pore and a small head pore, drilling and tapping a bolt hole, and cutting and machining a cracking tank on the big head pore of the connecting rod by cracking tank machining equipment; putting the connecting rod into the cracking equipment for breaking due to expansion, and assembling bolts; and finely grinding the sides of the connecting rod, finely boring the big pore and the small head pore, washing and checking. The technical proposal can help save time, reduce manufacturing procedures and improve assembly accuracy of the connecting rod.

Description

technical field [0001] The invention relates to a processing technology of an internal combustion engine connecting rod, in particular to a processing technology of an automobile engine connecting rod. Background technique [0002] The connecting rod of the engine is connected by bolts between the connecting rod body and the connecting rod cover; the traditional processing method of the connecting rod includes the following operations: rough grinding or milling of both ends of the blank, rough boring of the big and small head holes, and making the big head crankshaft hole Oval, drill and tap bolt holes, use a saw or mill to cut the big crankshaft hole Separate the connecting rod, then process the joint surface, usually broaching or milling into a tooth or groove shape, and then use the bolt to reassemble the connecting rod Cover and connecting rod body, then finish machining. [0003] The above-mentioned processing method has certain disadvantages, such as the processing of...

Claims

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Application Information

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IPC IPC(8): B23P15/14
Inventor 吴建鑫朱文吴伟新周建勇
Owner ZHEJIANG YUEJIN MACHINERY
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