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Manufacturing technology of speed reducer shell with high creep resistance

A manufacturing process and technology of reducer, which is applied in the field of manufacturing process of high creep resistance reducer shell, can solve the problems of inability to process the reducer shell, sand holes, air hole casting defects, and reduce product quality, etc. Reasonable process design, improving processing accuracy and improving product quality

Inactive Publication Date: 2019-05-10
ZHONGNENG TIANJIN INTELLIGENT TRANSMISSION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unreasonable process design of the existing casting method, the machining accuracy is low, and the reduction box shell with a thin wall thickness cannot be processed. It is easy to cause cold shut phenomenon during the pouring process, and it is easy to produce sand holes and air holes. Casting defects, reduce product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A manufacturing process for a high-creep-resistant reducer housing, the parts by weight of each component in the material formula are as follows:

[0062] 97 parts of iron,

[0063] 0.2 parts of yttrium,

[0064] 0.06 parts of titanium,

[0065] 0.05 parts of cerium,

[0066] Lanthanum 0.05 parts,

[0067] Samarium 0.02 part,

[0068] 0.5 parts of zinc,

[0069] Manganese 2 parts;

[0070] The specific manufacturing steps are as follows:

[0071] Step 1, raw material processing:

[0072] Under the protection of argon gas, melt iron into molten iron and heat up to 1550°C to obtain iron melt; take other metal raw materials, mix and ball mill them in a high-energy ball mill tank for 3 hours, and obtain mixed powder of metal raw materials;

[0073] Step 2, smelting:

[0074]Start the melting furnace, put the mixed powder obtained in step 1 into a crucible preheated to 500°C, and feed SF when the temperature rises to 700°C 6 and N 2 Mix protective gas; after the a...

Embodiment 2

[0088] A manufacturing process for a high-creep-resistant reducer housing, the parts by weight of each component in the material formula are as follows:

[0089] 95 parts of iron,

[0090] 0.1 parts of yttrium,

[0091] 0.05 parts of titanium,

[0092] 0.04 parts of cerium,

[0093] Lanthanum 0.04 parts,

[0094] Samarium 0.01 parts,

[0095] 0.4 parts of zinc,

[0096] Manganese 1.8 parts;

[0097] The specific manufacturing steps are as follows:

[0098] Step 1, raw material processing:

[0099] Under the protection of argon gas, melt iron into molten iron and heat up to 1545°C to obtain iron melt; take other metal raw materials, mix and ball mill them in a high-energy ball mill tank for 3 hours, and obtain mixed powder of metal raw materials;

[0100] Step 2, smelting:

[0101] Start the melting furnace, put the mixed powder obtained in step 1 into a crucible preheated to 500°C, and feed SF when the temperature rises to 700°C 6 and N 2 Mix protective gas; after t...

Embodiment 3

[0115] A manufacturing process for a high-creep-resistant reducer housing, the parts by weight of each component in the material formula are as follows:

[0116] Iron 100 parts,

[0117] 0.3 parts of yttrium,

[0118] 0.07 parts of titanium,

[0119] 0.06 parts of cerium,

[0120] Lanthanum 0.06 parts,

[0121] Samarium 0.03 parts,

[0122] 0.6 parts of zinc,

[0123] Manganese 2.3 parts;

[0124] The specific manufacturing steps are as follows:

[0125] Step 1, raw material processing:

[0126] Under the protection of argon gas, melt iron into molten iron and heat up to 1555°C to obtain iron melt; take other metal raw materials, mix and ball mill them in a high-energy ball mill tank for 3 hours, and obtain mixed powder of metal raw materials;

[0127] Step 2, smelting:

[0128] Start the melting furnace, put the mixed powder obtained in step 1 into a crucible preheated to 500°C, and feed SF when the temperature rises to 700°C 6 and N 2 Mix protective gas; after the...

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PUM

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Abstract

The invention provides a manufacturing technology of a speed reducer shell with high creep resistance. A material in the formula comprises components in parts by weight as follows: iron, yttrium, titanium, cerium, lanthanum, samarium, zinc and manganese. The technology comprises specific manufacturing steps as follows: step one, raw material treatment; step two, smelting; step three, die preparation; step four, casting; step five, surface treatment; and step six, heat treatment. The manufacturing technology is reasonable in design, impurities in alloy melt during smelting can be removed by cerium and lanthanum, machining precision is improved, machining of the speed reducer shell with small wall thickness is realized, furthermore, the phenomenon of cold shut in a casting process is also avoided, casting defects of sand holes and pores are overcome, and product quality is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing process of a reducer housing, in particular to a manufacturing process of a highly creep-resistant reducer housing. Background technique [0002] The gearbox is one of the most important components of the reducer. It has a complex structure and has high requirements for mechanical properties. It is an important auto part and is generally cast. The traditional main reducer shell casting method is to incorporate a coated sand core into the green sand mold, the green sand forms the casting shell, and the coated sand core forms the casting cavity. However, due to the unreasonable process design of the existing casting method, the machining accuracy is low, and the reduction box shell with a thin wall thickness cannot be processed. It is easy to cause cold shut phenomenon during the pouring process, and it is easy to produce sand holes and air holes. Casting defects, Reduce product quality. Co...

Claims

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Application Information

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IPC IPC(8): C22C38/14C22C38/04C22C33/04B22C9/02B22C9/24C21D1/18C21D9/00
Inventor 黄怀斌
Owner ZHONGNENG TIANJIN INTELLIGENT TRANSMISSION EQUIP CO LTD
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