Process for manufacturing multi-polar magnetic coder

Abstract

The invention relates to a process for manufacturing a multi-polar magnetic coder (also known as multi-polar magnetic ring) capable of detecting the rotation speed of a bearing. The process is characterized in that: strontium ferrite magnetic powder is mixed with raw rubber of nitrile-butadiene rubber, the raw rubber of nitrile-butadiene rubber containing the strontium ferrite magnetic powder anda metallic framework are vulcanized, the vulcanization temperature is controlled to be between 170 and 185 DEG C, and the vulcanization time is controlled to be between 4 and 8 minutes; and the vulcanized metallic framework with magnetic rubber is magnetized by a magnetizing clamp, and the magnetizing filed is required to be over 10,000(GS). The process has the advantages that: the multi-polar magnetic coder has a small volume, light weight and good softness, elasticity, and reelability; the coercive force is big, the metallic framework can be freely magnetized, and the metallic framework eventhough is quite thin can also be magnetized; and the products are available in various shapes and can be made into parts in complex shapes such as sheet, cylinder and the like.

Description

technical field [0001] The invention relates to a manufacturing process of a multi-pole magnetic encoder (Mul-poles magnetic encoder), in particular to a manufacturing process including a multi-pole encoder (also known as a multi-pole magnetic coil) capable of testing bearing rotation speed. Background technique [0002] At present, this product is widely used in the ABS system of automobiles. Using it can effectively reduce the quality and volume of related components, and has strong anti-interference. In the past, multi-pole magnetic encoders were made of metal magnets. The multi-pole magnetic encoders made of metal magnets have the disadvantages of heavy weight, large volume, easy to break, and inelasticity that make the product shape single, resulting in product quality that cannot meet the needs of the market. need. At present, the products used in domestic automobiles are basically products of foreign companies. Foreign companies impose a technical blockade on my coun...

AI Technical Summary

Problems solved by technology

In the past, multi-pole magnetic encoders were made of metal magnets. The multi-pole magnetic encoders made of metal magnets have the disadvantages of heavy weight, large volume, easy to break, and inelasticity that make the product shape single, resulting in product quality that cannot meet the needs of the market. need

At present, the products used in domestic automobiles are basically the products of foreign companies. Foreign companies impose a technical blockade on my country, and the products are expensive, and they do not sell products to domestic companies, so they are in a monopoly position.

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