Bearing rust prevention is an important task, especially rust prevention between processes. There are many processes after the bearings are pickled, cleaned and ground in the heat treatment workshop. When the product is not produced by running water, it is stored in the intermediate storage after being processed sequentially, so the bearing rings stored between the processes must be rust-proof.

Introduction to new anti-rust process methods

After years of joint research with relevant manufacturers, many years of production practice has shown that the anti-rust between processes has been improved several times to adopt the spray-type anti-rust The rust effect is better. Initially, the rust prevention of the roller was tested. The semi-finished product and the finished product were washed once a day with an aqueous solution of sodium nitrite. After 3 months, no rust was found in the test results. Now, the semi-finished product of the bearing ring is sprayed and rust-proof, and the effect is also the same. The spray-type anti-rust process is relatively simple, and the method is as follows:

1. Purchase and construction of equipment

According to how much semi-finished product is stored, an intermediate library is built, the ground is cemented, and the middle is A walkway can be set up, about 1.5m, for the trolley that passes through the bearing ring. Place a pool of sodium nitrite solution at the end of the channel. The solution is formulated with 5%-10% sodium nitrite plus 0.6% sodium carbonate. The backwater is made on the ground and the bearing rings are stacked on both sides of the floor. On the top, there is a 0.6m walkway between each pile of bearing rings. It can be said that the intermediate library is designed to be about 64m2, and its sodium nitrite aqueous solution pool is 1m3.

2. Process method

Rinse once a day with an aqueous solution of sodium nitrite. The aqueous solution is sucked from the pool by a water pump, passed through the rubber tube to the shower head, and rinses the bearing like a shower. Ferrules. The rinsed aqueous solution flows back to the pool from the backwater ditch, and is placed on the upper layer of the backwater tank at the end of the backwater ditch. A fine wire mesh and gauze are used as a filter to transport the dust and dirt into the pool. The intermediate library should be clean and in good condition.

The solution in the pool is tested every 2 days and is supplemented according to the test results. The replacement period of the solution in the pool is carried out according to different months. It is completely changed every 2 weeks from April to September, and October-March. , change once a month.

Conclusion

The rust-proof rust-proof, easy to manage, and labor-saving, in the past, the intermediate library with 2 people can not complete the rust, now you can also use one person to do other Work is also very noticeable from the rust prevention effect. In March 2003, more than 4,000 rolls of 7002136 and 3620 rollers were sprayed and rust-proof. They have remained very bright for nearly a year and have no rust. In addition, there is a great saving in the consumption of chemicals. In the past, the roller workshop consumed more than 4,000 kilograms of sodium nitrite per month, but now only 200 kilograms is used, saving nearly half.

The spray-type rust-proof method has been tested and used by relevant manufacturers in recent years, which proves that it is suitable for medium and large-sized, long-volume, long-cycle bearing semi-finished products.