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Casting process for crankshaft

A casting process and crankshaft technology, used in manufacturing tools, casting molding equipment, casting molds, etc., can solve the problems that the casting accuracy cannot be effectively guaranteed, the casting hardness is not enough, and there are many casting processes, so as to avoid quality defects and ensure casting quality. , the effect of reducing production costs

Inactive Publication Date: 2015-11-25
GUILIN CHANGXIN MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The crankshaft is composed of the main journal, the connecting rod journal, the crankshaft arm, the balance weight, the front axle end and the rear axle end, etc. One of the connecting rod journals, the crank arms at both ends and the front and rear main journals are combined together, called the crankshaft. Turn, in the current pouring process of the crankshaft, the hardness of the finished casting is not enough, not only the casting process is more, which affects the production capacity, but also the precision of the casting cannot be effectively guaranteed, and the scrap rate is high

Method used

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Embodiment Construction

[0024] The principles and features of the present invention are described below, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0025] The technical scheme that the present invention solves the problems of the technologies described above is as follows:

[0026] A crankshaft casting process, characterized in that it comprises:

[0027] Step S01: Make a sand mold according to the design size requirements of the crankshaft, the axis line of the sand mold is set horizontally, and the sand mold forms a sprue and an ingate, and the sprue and the ingate are connected by a transverse channel, The sand mold is baked at a high temperature of 750-900°C for 20 minutes, and then cooled to 400°C;

[0028] Step S02: melt the steel in the circuit, and after the temperature rises to 1400-1500°C, add a refining agent to refine for 20 minutes to obtain molten steel, the carbon content of the molten stee...

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Abstract

The invention relates to a casting process for a crankshaft. The casting process comprises the following steps: step S01: producing a sand mould according to the design dimension requirements of the crankshaft, horizontally arranging the axis line of the sand mould, forming a direct gate and an inner gate in the sand mould, connecting the direct gate with the inner gate through a transversal channel, roasting the sand mould for 20 minutes at a high temperature of 750-900 DEG C, and then cooling to 400 DEG C; step S02: smelting a steel material in a circuit, after a temperature rises to 1400-1500 DEG C, adding a refining agent and refining for 20min to obtain molten steel in which a carbon content is 0.1-0.14%, a silicon content is 0.15-0.19%, a nickel content is 0.36-0.45% and a manganese content is 0.46-0.55%; step S03: pouring the molten steel in the step S02 into the direct gate and the inner gate of the sand mould in the step S01, controlling a pouring temperature to be 1560-1660 DEG C and controlling a pouring time to be 40s, and after the pouring is finished, insulating for 30min; and step S04: cooling to normal temperature, talking out the formed crankshaft, cleaning the surface of the crankshaft, and then polishing to obtain the crankshaft.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a casting process of a crankshaft. Background technique [0002] The crankshaft is composed of the main journal, the connecting rod journal, the crankshaft arm, the balance weight, the front axle end and the rear axle end. One of the connecting rod journals, the crank arms at both ends and the front and rear main journals are combined together, which is called crankshaft. Turns out, in the current pouring process of the crankshaft, the hardness of the finished casting is not enough, not only the casting process is more, which affects the production capacity, but also the precision of the casting cannot be effectively guaranteed, and the scrap rate is high. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a crankshaft casting process for the above-mentioned deficiencies in the prior art. [0004] The technical solution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/22B22C9/08B22C9/02
Inventor 尚心河巩兰停
Owner GUILIN CHANGXIN MACHINERY MFG
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