Hairpin Motor Paint Removal Process

In the manufacturing process of flat wire hairpin motors, the paint removal process is an indispensable part. The current mainstream paint removal processes are stamping paint removal, laser paint removal and scraper paint removal. This article analyzes the advantages and disadvantages of each process and discusses how to choose the most suitable paint removal process under different production requirements.

01 Introduction to paint removal process

1. Stamping paint removal

Stamping paint removal is a process that physically removes the insulating paint layer on the surface of flat copper wire. This process uses molds and stamping equipment to place the flat copper wire in the mold, and crushes and removes the insulating paint layer by applying pressure.

The stamping paint removal process has the characteristics of low cost, high efficiency and high flexibility, and is suitable for flat copper wires of various specifications and shapes.

2. Laser paint removal

Laser paint removal is a process that uses a high-energy-density laser beam to act on the surface of the flat copper wire to melt or vaporize the insulating paint layer to achieve the paint removal effect.

Laser paint removal has the advantages of high efficiency, precision, environmental protection and easy automation. It is one of the more advanced paint removal methods in modern industrial production.

3. Scraper paint removal

Scraper paint removal is to remove the insulating paint layer on the surface of flat copper wire by scraping through mechanical equipment and sharp knives or blades.

The scraper paint removal process is easy to operate and has relatively low requirements for equipment, but the efficiency is low and the paint removal effect may be unstable, and it is easy to have the problem of unclean paint removal.

02 Introduction to the advantages and disadvantages of each paint removal process

1 Stamping paint removal

Advantages:

Low cost: The equipment and mold costs used in the stamping paint removal process are relatively low, which is suitable for large-scale production.

High efficiency: The stamping process can be completed in a short time, which is suitable for rapid production.

High flexibility: By replacing different molds, it can adapt to flat copper wires of various specifications and shapes.

Disadvantages:

The bare copper size of the welding end is reduced: During the stamping process, due to the extrusion of the mold, the bare copper size of the welding end will be reduced by about 30%, which may affect the welding quality.

Severe heating at welding points: Due to the reduction in the size of bare copper, the resistance of welding points increases, and the heating phenomenon is more serious, which may affect the operating efficiency and life of the motor.

2 Laser paint removal

Advantages:

High efficiency: The laser paint removal process can quickly remove the paint in one irradiation, greatly improving production efficiency.

No loss of bare copper: The laser beam can accurately act on the insulating paint layer without damaging the bare copper, ensuring the conductivity of the flat copper wire.

Disadvantages:

High equipment investment cost: Laser paint removal equipment is expensive and the initial investment is large.

Low equipment flexibility: The adjustment and maintenance of laser paint removal equipment are relatively complicated. For flat copper wires of different specifications and shapes, it may be necessary to redesign and adjust the equipment parameters.

3 Scraper paint removal

Advantages:

Less bare copper loss: During the scraper paint removal process, the bare copper is less damaged, ensuring the conductivity of the flat copper wire.

Low equipment requirements: Scraper paint removal equipment is relatively simple and easy to operate and maintain.

Disadvantages:

Low efficiency: The efficiency of the scraper paint removal process is low, and it takes more time and manpower.

Unclean paint removal: In the process of scraper paint removal, it is easy to have the problem of incomplete paint removal, which affects the subsequent connection and welding quality.

03 How to choose the paint removal process

When choosing the paint removal process, it is necessary to comprehensively consider many factors such as production needs, cost budget, product quality requirements, etc. Here are some suggestions:

1 Choose stamping for fast proofing

For situations where fast proofing or small batch production is required, stamping paint removal process can be selected. The stamping paint removal process has the advantages of low cost, high efficiency and high flexibility, and can quickly complete the production and testing of samples. At the same time, the stamping paint removal process can also adapt to a variety of specifications and shapes of flat copper wires, providing technical support for subsequent mass production.

2 Choose laser for mass production

For situations where large-scale mass production is required, laser paint removal process is a more suitable choice. The laser paint removal process has the advantages of high efficiency, precision and environmental protection, which can greatly improve production efficiency and quality stability. At the same time, the laser paint removal process can also avoid damage to bare copper, ensuring the conductivity and mechanical strength of flat copper wire. Although the initial investment of laser paint removal equipment is large, its high efficiency, stability and environmental protection can bring significant economic and social benefits to enterprises in the long-term production process.

The paint removal process of new energy flat wire motor is a key technical link, which has an important impact on the performance and quality of the motor. When choosing the paint removal process, it is necessary to comprehensively consider various factors such as production needs, cost budget and product quality requirements. The stamping paint removal process is suitable for rapid proofing and small batch production; the laser paint removal process is suitable for large-scale mass production. By reasonably selecting the paint removal process, production efficiency can be improved, costs can be reduced, and product quality can be improved, contributing to the development of the new energy vehicle industry.