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Cold heading forming technology for balancing weight and die structure for pre-heading large step

A molding process and counterweight technology are applied in the field of cold heading molding process of auto brake counterweight and the mold structure field of pre-heading large steps, which can solve the problem of poor molding stability of products, affect the service life of molds, and increase the number of products. Production costs and other issues, to achieve the effect of saving materials, smooth internal flow, and prolonging service life

Inactive Publication Date: 2015-02-04
SUZHOU INDAL PARK XINKAI PRECISION FASTENERSCO
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The main function of the counterweight is to maintain balance through the weight of the counterweight. At present, in the automotive industry, the counterweight is more useful. In the existing technology, it needs to be processed by a lathe and a milling machine for final molding. Products, the incomplete internal metal streamlines lead to low product strength, internal folding phenomenon will occur, and will also affect the service life of the mold, reduce production efficiency, product molding stability is not good, and increase the production cost of the product

Method used

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  • Cold heading forming technology for balancing weight and die structure for pre-heading large step
  • Cold heading forming technology for balancing weight and die structure for pre-heading large step
  • Cold heading forming technology for balancing weight and die structure for pre-heading large step

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] Such as figure 1 A counterweight cold heading forming process is shown, and the process steps are:

[0028] S1, cutting the wire rod and performing phosphorus saponification on the wire rod twice;

[0029] S2. The small rod diameter of cold heading forming has a shrinkage ratio of 83%; the theoretical value of the shrinkage ratio is 75%, and the shrinkage ratio of this product has far exceeded the theoretical value. Hypophosphorous saponification makes the surface lubricated better, and the manufacturing precision of the mold cavity is required to be very high;

[0030] S3, cold heading expansion large rod diameter;

[0031] S4, cold heading and pre-heading large steps;

[0032] S5, cold heading forming large steps.

[0033] The wire is work hardened.

[0034] In the step S4, part of the product is formed in the main mold, and the other part is formed in...

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Abstract

The invention relates to a cold heading forming technology for a balancing weight and a die structure for pre-heading a large step. The technology comprises the technical steps of S1, cutting a wire rod; S2, forming a small rod diameter; S3, expanding a large rod diameter; S4, pre-heating the large step; S5, forming the large step. The die structure comprises a main die unit and a stamp die unit, wherein the main die unit comprises a main die shell; a main die inner die is arranged in the main die shell; a main die base plate is arranged at the bottom of the main die shell; a main die thimble is arranged in the middle of the main die inner die; the stamp die unit comprises a stamp die shell; a forming die is arranged in the stamp die shell; a stamp die base plate is arranged at the bottom of the stamp die shell; a main die cushion block is arranged between the main die inner die and the main die base plate; a forming insert is arranged on the main die inner die; a forming die limiting plate is arranged between the forming die and the stamp die base plate; a stamp die mandril is arranged between the forming die limiting plate and the stamp die base plate. By cold heading, the manufacturing of balancing weights of all sizes, large and small rod diameters and chamfers is realized, and the inner flow line of a product is complete; furthermore, the balancing weight is high in intensity, and the service life of a die is prolonged.

Description

technical field [0001] The invention relates to the automobile production and manufacturing industry, in particular to a cold heading forming process of a counterweight for automobile brakes and a mold structure of a pre-heading large step. Background technique [0002] The main function of the counterweight is to maintain balance through the weight of the counterweight. At present, in the automotive industry, the counterweight is more useful. In the existing technology, it needs to be processed by a lathe and a milling machine for final molding. Products, the incomplete internal metal streamlines lead to low product strength, internal folding phenomenon will occur, and will also affect the service life of the mold, reduce production efficiency, product molding stability is not good, and increase the production cost of the product . Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a mold structure with large pre-...

Claims

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Application Information

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IPC IPC(8): B21K7/14B21J13/02
Inventor 王宁田小娟杨天昊
Owner SUZHOU INDAL PARK XINKAI PRECISION FASTENERSCO
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