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Casting method of gear

A colloidal and liquid binder technology, which can be used in casting molding equipment, casting molds, casting mold components, etc., and can solve problems such as low production efficiency, high labor intensity, and waste of human resources.

Active Publication Date: 2013-01-09
宁波吉威熔模铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the traditional casting process requires a lot of manpower during the preparation of the molding sand, the process of making the sand mold, and the cleaning of the castings in the later stage. The labor intensity is relatively high, and a lot of precious human resources are wasted. At the same time, each product is cast Need to repeat the above process, low production efficiency

Method used

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  • Casting method of gear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Follow the steps below to cast a gear sample,:

[0032] 1) Dip the preformed fusible model into a slurry composed of ceramic particles and colloidal liquid binder, thereby forming a coating on the model and spray drying; the ceramic particles can be silicon carbide, silicon nitride Or tungsten carbide, the size of the particles is 20-50 μm; the colloidal liquid binder is polyacrylamide; the weight ratio of ceramic particles and colloidal liquid binder in the slurry composed of ceramic particles and colloidal liquid binder is 1 :0.1;

[0033] Wherein, step 1) is repeated 3 times;

[0034] 2) Apply a slurry composed of refractory material particles and colloidal liquid binder to the coating in step 1), and spray dry; wherein, the refractory material is silica; the refractory material particles and glue The weight ratio of solidified material is 100:5;

[0035] Wherein, step 2) is repeated twice;

[0036] 3) 200°C for 1 hour to melt the mold, and bake the shell;

[00...

Embodiment 2

[0043] Follow the steps below to cast a gear sample,:

[0044] 1) Dip the preformed fusible model into a slurry composed of ceramic particles and a colloidal liquid binder, thereby forming a coating on the model and spray drying; the ceramic particles are silicon nitride and tungsten carbide ( The weight ratio is 10:1), the particle size is 100-200μm; the colloidal liquid binder is polyacrylate; ceramic particles and colloidal liquid binder in the slurry composed of ceramic particles and colloidal liquid binder The weight ratio is 1:10;

[0045] Wherein, step 1) is repeated 5 times;

[0046] 2) Apply a slurry consisting of refractory particles and colloidal liquid binder to the coating in step 1), and spray dry; wherein, the refractory material is magnesium oxide; the refractory particles and gelled The weight ratio of forming materials is 100:10;

[0047] Wherein, step 2) is repeated 3 times;

[0048] 3) Heat at 400°C for 1 hour to melt the mold and bake the shell;

[00...

Embodiment 3

[0053] Follow the steps below to cast a gear sample,:

[0054] 1) Dip the preformed fusible model into a slurry composed of ceramic particles and a colloidal liquid binder, thereby forming a coating on the model and spray drying; the ceramic particles are tungsten carbide, and the size of the particles is 50-100 μm; the colloidal liquid binder is a mixture of polyacrylamide and polyacrylate; the weight ratio of ceramic particles and colloidal liquid binder in the slurry composed of ceramic particles and colloidal liquid binder is 1:0.5 ;

[0055] Wherein, step 1) is repeated 3 times;

[0056] 2) Apply a slurry composed of refractory particles and colloidal liquid binder to the coating in step 1), and spray dry; wherein, the refractory material is alumina; the refractory particles and gelled The weight ratio of forming materials is 100:1;

[0057] Wherein, step 2) is repeated twice;

[0058] 3) Heat at 300°C for 2 hours to melt the mold, and bake the shell;

[0059]4) Prep...

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Abstract

The invention relates to a casting method. Ceramic anti-wearing grains are used for replacing fireproof materials, and a liquid coating formed by mixing the ceramic anti-wearing grain and a binding agent is coated on the surface of a module to prepare a section mould; a fired mould is smelted, and alloy liquid is injected; a casting piece is formed along with the cooling and the condensation of the injected alloy liquid; the ceramic anti-wearing grains are led to the surface of the casting piece to carry out heat treatment so as to increase one layer of a ceramic hardening layer on the surface of the casting piece and improve the surface hardness of the casting piece. With the adoption of the casting method, the casting piece is formed for one time, the surface is smooth and clean, and the size is accurate, so that the aim of less cutting or no cutting is achieved; and the surface is provided with the ceramic hardening layer, and the hardness is greatly improved, so that the casting method is particularly suitable for preparing an alloy casting piece such as a gear, which need higher surface hardness.

Description

technical field [0001] The invention relates to a casting method, in particular to a gear casting method. Background technique [0002] Gears are generally made of special gear steel, first processed into gear blanks, and then processed by machining, tooth profile processing, heat treatment, finishing and other processes. The process cycle is long, the processing technology is complicated, and the machining is difficult. Moreover, it is required that the obtained gear core has good toughness, high torsional fatigue strength, high surface hardness and good wear resistance. [0003] Casting is one of the main methods of producing parts blanks, and it is a very fast preparation method. Especially for parts of some brittle metals or alloy materials, casting technology is a commonly used processing method. The forming principle is: heat and melt the metal to make it It has fluidity, and then poured into a mold cavity with a certain shape, filled the cavity under the action of gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22C3/00B22C1/22C22C38/50C21D9/32
Inventor 罗绍康
Owner 宁波吉威熔模铸造有限公司
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