High precision cold forging forgings are widely used in many fields, especially in medical, aerospace and automotive manufacturing. In order to meet the high requirements for forgings in these fields, the production process and quality must be strictly controlled. This paper will deeply discuss the production technology and quality control measures of high precision cold forging parts.
Production technology
Material selection: Selecting high-quality materials is the first step in manufacturing high-precision cold forging. The material should have the appropriate chemical composition, physical properties and mechanical properties to meet the requirements of the final product. Commonly used materials include carbon steel, alloy steel, stainless steel and so on.
Billet preparation: The shape and size of the billet should be designed according to the requirements of the final product. The billet can be prepared by casting, forging, rolling and other methods. During the preparation process, the chemical composition, structure and mechanical properties of the billet should be strictly controlled to ensure the quality of the billet.
Cold forging forming: Cold forging forming is the core process of high precision cold forging forging. During cold forging, the material is plastically deformed by a die at room temperature to form the desired shape and size. In order to obtain high precision forgings, it is necessary to precisely control the shape, size and machining accuracy of the die, as well as the temperature, speed and lubrication conditions during cold forging.
Post-treatment: After cold forging forming, some post-treatment processes may be required, such as heat treatment, machining, cleaning, etc. These processes can further improve the mechanical properties, appearance quality and dimensional accuracy of forgings. The process parameters and operating conditions should be strictly controlled in the post-treatment process to ensure the quality of the forging.
Quality control
Incoming inspection: Incoming inspection of billets and molds to ensure that their quality meets the requirements. Common testing methods include chemical composition analysis, metallographic testing, hardness testing and so on. For unqualified billets and molds, they should be returned or scrapped in time to avoid flowing into the production process.
First inspection system: Before the start of production, the first product is comprehensively inspected to ensure that its quality meets the requirements. The contents of the first inspection should include appearance quality, dimensional accuracy, mechanical properties and so on. After passing the first inspection, mass production can be carried out.
Process control: In the production process, it is necessary to strictly control the process parameters and operating conditions of each process. Key processes, such as cold forging and post-processing, should be monitored. Through the introduction of automatic control system and online monitoring equipment, real-time monitoring and data collection of the production process can be realized to ensure the stability of product quality.
Finished product inspection: Complete inspection of the finished product to ensure its quality meets the requirements. The content of finished product inspection should include appearance quality, dimensional accuracy, mechanical properties and so on. For unqualified products, they should be reworked or scrapped in time to avoid entering the market.
Quality traceability: Establish a quality traceability system, number and record each batch of products, so that in the event of a problem, the cause and responsible party can be quickly traced. Through the introduction of information management system, product quality information can be updated and shared in real time, and quality management efficiency can be improved.
Continuous improvement: regularly review and summarize the production process, analyze existing problems and deficiencies, propose improvement measures and implement them. Through continuous improvement, production efficiency and product quality can be continuously improved to meet the needs of the market and customers.
The production process and quality control of high precision cold forging is a complicated and important work. By strictly controlling the process of material selection, billet preparation, cold forging forming and post-treatment, as well as implementing quality control measures such as incoming inspection, first inspection system, process control, finished product inspection and quality traceability, the quality and performance of forgings can be ensured to meet the requirements. At the same time, through continuous improvement and innovation, production efficiency and product quality can be continuously improved, providing a strong guarantee for the sustainable development of enterprises.
