Step 1: There are three ways to remove oil and scale the finger spring:

1. Immerse the finger spring in a plastic container diluted with clean water metal cleaning agent A (the ratio of cleaning agent A and water dilution is about 1:1 or 1:2), the time is suitable for the spring surface to be free of oil stains, no oxide scale to restore the metal nature, soaking time should not be too long, take out and wash with water. In this way, the contact spring has a matt effect on the outside

2. Cleaning agent A is put into an oscillating finishing machine with coarse abrasive and spring or hexagonal drum (the volume ratio of spring to coarse abrasive is 1:3, and the amount of cleaning agent is 1%-2% of the weight of the spring) After grinding and polishing, wash with clean water, the scratches on the surface of the spring are gone, and the finish of the spring surface is improved. However, springs with high precision and easy to surround are not suitable for this method.

The above two methods can be applied to springs with high precision.

3. The ratio of cleaning agent and clean water in ultrasonic equipment is about 1:30, and the time is appropriate to restore the metal nature of the spring without oil and oxide scale, and take it out and wash it with clean water, so that the surface of the finger spring can reach the matt effect.

Step 2: Varnish the finger spring:

Put brightener B into an oscillating polishing machine or hexagonal drum with coarse abrasive (the volume ratio of spring to fine abrasive is 1:3, and the amount of brightening agent B is about 1%-2% of the weight of the spring, the longer the brighter) After polishing, take it out and wash it with clean water to dry, so that the appearance of the finger spring is like nickel plating and will never fade.

Dongguan Spring Springs Electronics Co., Ltd. (SiS) was established in October 2011, specializing in the design, testing and manufacturing of spring finger & high-current connectors, and moved to Chang'an Town, Dongguan in May 2018. The company has CNC lathe workshop, spring finger workshop, assembly workshop, laboratory. Based on the increasing requirements of connectors for high-current connectors in various industries, Spring in Spring Electronics has developed a new type of bidirectional coil spring contact finger (SiS®) and single-turn spring finger , forming a number of array-type deformation contact points (up to more than 300 points). It can meet the service life of more than 100,000 times, the spring contact current density and temperature rise are close to the transmission cable, and the single-turn plugging force is about 5-10N. PCB board connector (board-to-board USC, board-to-wire), cylindrical quick-swap self-locking connector (plastic and metal shell), male and female with weight load connector, electric vehicle charger, high-voltage power battery pack series connector, used in Z advanced high-current energy collector, energy storage and electrical equipment, shock spring

For example: electric vehicles, charging base stations, wind energy generators, power supplies, high-speed rail, heavy trucks, etc. The company has a number of national invention & utility model patents, and the products have passed international standard testing.