Cold heading is an important metal forming technology in steel ball production.

First, cold heading process principle

Cold heading process is to use the plastic deformation characteristics of metal at room temperature, through impact or pressure to form metal materials in the mold. The process of cold heading usually involves pressurizing the metal blank so that it flows and fills the shape of the die, and the deformation of the material in this process is mainly achieved through stress concentration.

Two, cold heading equipment

1. Cold heading machine:

Type: Cold header according to the structure and function can be divided into single punch cold header and multi-station cold header.

Operation: The cold header is electrically or hydraulically driven, with an upper and lower die, and is designed to achieve a variety of forming methods (such as stamping, cutting, etc.).

2. Mold:

Material: Molds are usually made of high-hardness materials to improve wear resistance and service life.

Design: The design of the mold needs to be optimized according to the shape and size of the product to ensure that the flow of materials is controlled during the deformation process.

Three, cold heading process

1. Raw material preparation:

ｓｅｌｅｃｔ the appropriate steel strip, according to product requirements cut into the appropriate length of the blank.

2. Blank feed:

Put the cut steel blank into the feed port of the cold header to ensure that the blank size meets the equipment requirements.

3. Header forming:

Turn on the cold header and use rapid shock or continuous pressure to shape the blank in the mold.

Four, the advantages of cold heading process

1. High productivity:

The cold heading process is fast and suitable for large-scale production, especially for mass production of small parts.

2. Excellent mechanical properties:

Because the material is processed in a cold state, the mechanical properties of the parts are relatively superior, with good strength and toughness.

3. Cost effectiveness:

Cold heading reduces material waste and often reduces production costs by eliminating the need for subsequent cutting.

4. Accuracy and consistency:

Cold heading enables high accuracy and consistency of product dimensions, reducing machining errors.

5. Good surface texture:

The surface of cold heading parts is smooth, which reduces the difficulty of subsequent processing.

Five, the shortcomings of cold heading process

1. High equipment investment:

Efficient cold heading equipment and mold manufacturing require a high initial investment.

2. Mold wear:

The die wear is relatively serious in the process of cold heading, which requires regular replacement and maintenance.