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New anti-rust technology in fine bearing process
Source: Bearing network time: 2013-05-03
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Bearing anti-rust operation is an important operation; especially the anti-rust between processes; like the bearing is washed, removed, and ground in the heat treatment workshop; there are many processes. When the product is not produced by running water; The end of the sequence processing is stored in the central warehouse; therefore, the bearing rings stored between the processes need to be rust-proof.
Traditional rust prevention methods and their lack of rust prevention between bearing processes are generally selected as follows:
1. Immerse in the anti-rust tank to immerse the bearing in the aqueous solution of 5% sodium nitrite and 0.6% sodium carbonate; the anti-rust effect is good; but many anti-rust tanks and other equipment; occupy a lot of space; .
2. Dip the concentrated sodium nitrite solution to remove the product; immerse it in a solution rich in 15%-20% sodium nitrite and 0.6% sodium carbonate; then stack it up. Use this method to prevent rusting period Short; usually only for 7-14 days; and in the rainy season; because the climate is humid; only 2-3 days can be re-processed; demand costs labor and money.
3. Oil-coated products are coated with anti-rust oil. This method is necessary to remove before performing the next process;
The analysis of the new anti-rust process has been tackled by the relevant manufacturers; the production practice has been marked for many years; the anti-rust between the processes has been improved repeatedly; the anti-rust effect of the spray-jet type is better than that. The trial of the anti-rust of the roller is started; The semi-products and products were washed once a day with an aqueous solution of sodium nitrite; after 3 months, no rust was found in the results of the test; now the rust-proof rust is used for the semi-products of the bearing scam; the effect is also the same. The rust-proof rust-proof process is simpler; The method is as follows:
1. The purchase and construction of equipment depends on how much semi-products are stored; a central repository is established; a cement floor is used on the ground; a walkway can be set up in the center; about 1.5 m; a trolley used to pass the bearing ring. A nitrous acid is placed at the end of the passage. Sodium solution pool; solution formulation is 5%-10% sodium nitrite plus 0.6% sodium carbonate; and the backwater drain is made on the ground; then the bearing rings are stacked on both sides of the floor; each pile of bearing rings There is a 0. 6m walkway between them. The central library can be described as about 64m2; its sodium nitrite aqueous solution pool is 1m3.
2. The process is washed once a day with an aqueous solution of sodium nitrite; the aqueous solution is sucked from the pool by a water pump; the rubber pipe is passed to the shower head; the bearing ring is flushed like a shower. The washed aqueous solution flows back to the pool from the backwater channel; Back to the upper end of the water pool; use a fine wire mesh and gauze to make a filter mesh to the textile ash and dirt into the pool. The central library should be quality and hygienic.
The solution in the pool is tested every 2 days; it is compensated according to the results of the test; the replacement period of the solution in the pool is carried out in different months; the exchange is completely exchanged every 2 weeks from April to September; the monthly exchange is from October to March; once.
It is more convenient to handle the rust-proof type; it is more convenient to handle; it saves labor; it can't be finished with 2 small rust prevention in the central warehouse; now it can also do other operations with one person; it is also obvious from the rust prevention effect. In March 2003, more than 4,000 rolls of 7002136 and 3620 were used; the rust-proof rust was selected; for nearly a year, it was still very bright; there was no rust. In addition, the consumption of chemicals was also greatly saved; The roller workshop costs more than 4,000 kilograms of sodium nitrite per month; today it only uses 200 kilograms; it saves nearly half.
The spray-type rust-proof method has passed the experiment and application of related manufacturers in recent years; it proves that it is suitable for medium and large-sized, large-volume, long-cycle bearing semi-products.
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