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Casting Method of Ductile Iron Steering Knuckle

A technology of nodular cast iron and steering knuckles, which is applied in the direction of casting molding equipment, casting molds, and casting mold components. It can solve the problems of low production efficiency casting waste rate, and achieve the effects of reducing production costs, not being easy to cool quickly, and increasing pouring speed.

Active Publication Date: 2015-09-09
宁波强盛机械模具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies of the prior art, the present invention provides a nodular cast iron steering knuckle with fast pouring speed, less prone to shrinkage porosity, shrinkage cavities and other casting defects, high production efficiency, low casting rejection rate and better mechanical properties. casting method

Method used

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  • Casting Method of Ductile Iron Steering Knuckle
  • Casting Method of Ductile Iron Steering Knuckle

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Embodiment

[0019] First of all, what needs to be explained and explained is that the casting process of the so-called rapid vertical pouring of the nodular cast iron steering knuckle includes the pouring system and the mold should be in the corresponding production line, and the pouring time can be improved by controlling the cross-sectional size of each part of the pouring system to meet the requirements. Fast production tempo (the highest production tempo is 400 boxes per hour), and at the same time eliminate casting defects such as cold shut and insufficient pouring that may occur in rapid pouring. In this way, the whole process is controlled as a fast vertical pouring casting process.

[0020] Combine below Figure 1-2 The present invention is described in detail, and its main technical measures include the following:

[0021] (1) Mold production: According to figure 1 The structure of the steering knuckle casting is shown, and molds are made by conventional mold making processes, ...

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Abstract

The invention discloses a casting method of a steering knuckle of nodular cast iron. The casting method comprises a mold manufacturing step, a sand mold manufacturing step and a pouring molding step, wherein the steering knuckle is vertically arranged, a thick part of a steering knuckle casting is arranged at the upper part, a thin-walled part of the steering knuckle casting is arranged at the lower part; a pouring system of the steering knuckle casting is divided into a pouring cup, a cross pouring gate and a straight pouring gate, the cross pouring gate is connected to the lower part of the pouring cup, the straight pouring gate is connected to the lower part of the cross pouring gate, and a scum riser is arranged at the bottom end of the straight pouring gate; the side wall of the straight pouring gate is connected with a first inner pouring gate, a second inner pouring gate and a third inner pouring gate from top to bottom; the steering knuckle casting is further provided with a hot riser, a cold riser and exhausting pieces; the sectional area ratio of each component of the casting is that F(straight pouring gate):F(cross pouring gate):F(inner pouring gates) is equal to 1:(1.2-1.4):(1.35-1.5); the casting is obtained by controlling the pouring temperature at 1370-1410 DEG C and carrying out pouring for 5-10 seconds. The casting method has the advantages that pouring speed is high, the defects such as shrinkage porosity, shrinkage cavity and the like cannot easily occur, and the casting is high in production efficiency, low in rejection rate and excellent in mechanical property.

Description

technical field [0001] The invention belongs to the technical field of sand mold gravity casting technology, and in particular relates to a casting method of a nodular cast iron steering knuckle. Background technique [0002] The steering knuckle is a very important part in the automobile control system. Its structural shape is relatively complex and its wall thickness varies greatly. It can be said that it is the part with the most complex shape and the largest wall thickness variation in the automobile control system. Therefore, the market demand is relatively large, and the mass production of the production line is adopted, which brings great challenges to the casting process of the parts. [0003] At present, the vast majority of steering knuckles use the casting process of horizontal pouring in actual production. There are some disadvantages in the production of this process. First, the production efficiency is relatively low. Generally, the pouring speed of molten iron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/08B22C9/22C22C37/10
Inventor 杨友利耿前程
Owner 宁波强盛机械模具有限公司
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