Preparation method of cold stamping die for steel hub

A technology of cold stamping and mold, applied in the field of mold preparation, which can solve the problems of substandard dimensional accuracy of steel hubs, limited service life of cold stamping molds, high processing and manufacturing costs, and achieve high qualified rate of finished products, low cost of raw materials and processing and manufacturing , the effect of high production efficiency

Inactive Publication Date: 2017-09-29
滁州市东华模具制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing cold stamping dies use Cr12MoV die steel as the raw material, the price of raw materials and processing and manufacturing costs are relatively high, and due to the limitations of the processing technology, the obtained cold stamping dies have a large deformation when subjected to huge pressure, and the produced steel The dimensional accuracy of the wheel hub is not up to standard, the product qualification rate is low, and the service life of the cold stamping die is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of a kind of steel hub cold stamping die that the present invention proposes comprises the following steps:

[0020] S1. Prepare the mold material, by weight percentage, including C 0.2%, Mn 1.2%, Cu 3.4%, SiC 3%, P 0.05%, RE 1%, and the balance is Fe. The mold material for cold stamping mold will be produced in After mixing and smelting at high temperature, casting is made into castings for production molds of required size and specifications;

[0021] S2. Use CAD software to draw a processing drawing of a standard wheel hub cold stamping die according to the required size specifications, and process the casting obtained in step S1 in strict accordance with the drawing to obtain a wheel hub cold stamping die;

[0022] S3, placing the mixed salt of barium chloride, calcium carbonate, silicon oxide, chromium sulfate and aluminum oxide with a mass ratio of 3:2:2:1:0.8 in an internal heating type crucible, after heating and melting at a high temperat...

Embodiment 2

[0026] The preparation method of a kind of steel hub cold stamping die that the present invention proposes comprises the following steps:

[0027] S1. Prepare mold materials, by weight percentage, including C 0.4%, Mn 1.5%, Cu 3.3%, SiC 4.2%, P0.1%, RE 1.5%, and the balance is Fe, which will produce mold materials for cold stamping molds After mixing and smelting at high temperature, casting is made into castings for production molds of required size and specifications;

[0028] S2. Use CAD software to draw a processing drawing of a standard wheel hub cold stamping die according to the required size specifications, and process the casting obtained in step S1 in strict accordance with the drawing to obtain a wheel hub cold stamping die;

[0029] S3. Place the mixed salt of barium chloride, calcium carbonate, silicon oxide, chromium sulfate and aluminum oxide with a mass ratio of 3.5:2.2:2.4:1:1 in an internal heating type crucible, heat and melt at a high temperature, and heat ...

Embodiment 3

[0033] The preparation method of a kind of steel hub cold stamping die that the present invention proposes comprises the following steps:

[0034] S1. Prepare mold materials, by weight percentage, including C 0.5%, Mn 1.2%, Cu 3.5%, SiC 4.5%, P0.12%, RE 2%, and the balance is Fe, which will produce mold materials for cold stamping molds After mixing and smelting at high temperature, casting is made into castings for production molds of required size and specifications;

[0035] S2. Use CAD software to draw a processing drawing of a standard wheel hub cold stamping die according to the required size specifications, and process the casting obtained in step S1 in strict accordance with the drawing to obtain a wheel hub cold stamping die;

[0036] S3, placing the mixed salt of barium chloride, calcium carbonate, silicon oxide, chromium sulfate and aluminum oxide with a mass ratio of 3.8:2.5:2.2:1:0.8 in an internal heating type crucible, after heating and melting at a high tempera...

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PUM

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Abstract

The invention discloses a method for preparing a steel wheel hub cold stamping die, which comprises the following steps: mixing and smelting mold materials for producing cold stamping dies at high temperature, and then casting them into castings for production dies of required sizes and specifications; The drawings process the castings to obtain the wheel hub cold stamping die; put the mixed salt in the internal heating crucible, heat and melt at high temperature, and keep warm to obtain the molten liquid; use the cleaning liquid to clean the surface of the wheel hub cold stamping die, and then preheat it at high temperature. The preheated mold is obtained; the preheated mold is added to the heat preservation molten liquid, quenched and tempered in turn after soaking, and finally cooled naturally to room temperature. Compared with the prior art, the present invention has the advantages of low raw material and processing and manufacturing costs, strong impact toughness and long service life of the obtained cold stamping die, and the steel wheel cold stamping die obtained by the present invention is used for the production of steel wheels. It has the advantages of high production efficiency and high qualified rate of finished products, and is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of mold preparation, in particular to a method for preparing a steel hub cold stamping mold. Background technique [0002] The wheel hub is an important running part of the car. The driving process of the car will generate lateral and longitudinal loads. At the same time, with the driving torque and braking torque, the wheel hub needs to bear a considerable part of the load. With the rapid development of the automobile industry, the requirements for the stiffness and strength of the wheel hub are also getting higher and higher. Steel wheels are widely used in trucks due to their great advantages over aluminum alloy wheels in terms of cost and safety. In the prior art, a common production method for steel wheels is to press alloy steel plates through cold stamping dies under pressure, and the service life of cold stamping dies is an important factor affecting the mass production of steel wheels. Most of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/16C22C38/02C21D1/18C21D9/00C23G5/032B21D37/20
CPCC22C38/04B21D37/20C21D1/18C21D9/0068C22C38/002C22C38/005C22C38/02C22C38/16C23G5/032
Inventor 王华东乔龙功陈根根
Owner 滁州市东华模具制造有限公司
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