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Connecting rod part processing method

A technology for parts processing and processing methods, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problem of high unit energy consumption of products, and achieve the effects of reducing production costs, reducing processes, and shortening time.

Inactive Publication Date: 2016-10-05
CHONGQING JUNZHUO MACHINERY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic construction machinery industry still mainly uses the traditional quenched and tempered steel 40Cr as the main raw material, and the research and application of non-quenched and tempered steel is less, and the unit energy consumption of the product is high

Method used

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Embodiment Construction

[0015] Below in conjunction with embodiment the present invention will be further described, and its operating steps are as follows:

[0016] A kind of connecting rod part processing method, described material is 40Cr, and this processing method comprises the following steps:

[0017] (1) Furnace heating: heating in the heating furnace, the heating temperature is 870-1200 ℃, and the heat preservation is 7-12 hours;

[0018] Forging: Upsetting and drawing are performed twice on the die forging machine to ensure that the first upsetting and drawing ratio is: 1.2 ≤ upsetting ratio ≤ 1.5, 1.2 ≤ drawing length ratio ≤ 1.5, and the second upsetting and drawing ratio is: 1.2 ≤ upsetting ratio ≤ 1.3, 1.2 ≤ draw ratio ≤ 1.5, keep forging temperature 870~1200℃, final forging temperature ≥ 820℃;

[0019] (2) The rolled finished material is blanked to obtain the required specifications without quenching and tempering treatment, and the surface is directly quenched after rough machining t...

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PUM

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Abstract

The invention discloses a connecting rod part processing method. A material is 40 Cr. The processing method is characterized by including following steps: (1), charging the material into a furnace, and heating; (2), blanking a rolled material to obtain needed specification, directly performing surface quenching after rough machining without tempering to form a semi-finished product; (3), carburizing and quenching to obtain a non-tempered connecting rod, wherein quenching temperature is 850-950 DEG C, quenching time is 60-90 min, and a quenching agent is water or oil; (4), punching and edge-cutting, wherein roughness Ra is less than 1.6 um; (5), polishing and refining, wherein roughness Ra is less than 0.4 um; (6), sequentially performing rust preventing, inspecting, packaging and warehousing. By using the connecting rod part processing method, process parameters of each stage are controlled strictly, and processes are reduced remarkably; the connecting rod part processing method is simple in process, convenient to operate and low in energy consumption.

Description

technical field [0001] The invention belongs to the field of mechanical processing technology, in particular to a processing method for connecting rod parts. Background technique [0002] In the prior art, an automobile connecting rod is made of 40Cr. The traditional quenching and tempering treatment has long production cycle, high energy consumption and high production cost. At the same time, the working environment is harsh, and the "three wastes" polluting the environment are produced during the production process. . With the shortage and depletion of global resources and energy, energy conservation and emission reduction, and the development of low-carbon economy have become the consensus of the world, and it is also the direction for China to adjust its economic structure and development model in the future. Therefore, the research application of non-quenched and tempered steel, [0003] Energy saving and consumption reduction meet the requirements of developing a low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C21D9/00C21D1/18
Inventor 翁鸿钟
Owner CHONGQING JUNZHUO MACHINERY
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