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Method for coating nylon resin spline

A nylon resin, coating technology, applied in coating, device for coating liquid on surface, surface pretreatment, etc., can solve problems affecting product reliability and service life, uneven fitting clearance of spline sleeve, spline shaft Problems such as low surface roughness, to achieve good wear resistance, improve reliability and service life, and the effect of sensitive steering

Active Publication Date: 2015-03-25
ZHEJIANG WANDA AUTOMOBILE DIRECTION MACHINE CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] The spline shaft assembly is one of the important parts of the automobile steering transmission device. In the past, the spline shaft and the spline sleeve of the vehicle spline shaft assembly were directly matched with steel parts. It is easy to produce jitter and abnormal noise, and the direction sensitivity is not high
Later, the spline shaft surface nylon coating process also appeared one after another, that is, the cold-drawn spline shaft after processing is directly coated with nylon on the surface, but the surface roughness of the spline shaft using this process is low, and it is different from the spline sleeve. The fit gap is uneven, and once the surface coating layer is run-in, it will directly affect the reliability and service life of the product

Method used

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  • Method for coating nylon resin spline

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Embodiment Construction

[0020] The nylon resin spline coating method includes the following steps:

[0021] 1) Cleaning: Surface cleaning is carried out in a cleaning tank filled with an alkaline solution with a pH above 11, and the pH value of the solution is monitored by a pH meter for the alkaline solution in the cleaning tank;

[0022] 2) Drying: Put the workpiece into the drying chamber and dry it under the warm wind at 70°C for more than 1 minute. The temperature sensor in the drying chamber is used to monitor the temperature in the chamber, and the temperature in the drying chamber is displayed on the monitor;

[0023] 3) Sandblasting: Use a sandblasting machine with an air pressure of 50-70kPa to sandblast the dried workpiece in step 2), so that the arithmetic average deviation of the surface profile of the workpiece is less than 12 μm. The sandblasting machine uses a surface roughness sensor to detect and record the roughness;

[0024] 4) Heating: Put the workpiece processed in step 3) into ...

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Abstract

The invention discloses a method for coating a nylon resin spline. The method comprises the steps of cleaning, drying, sand blasting, heating, primer dipping, oven drying, high-frequency heating, resin coating, cooling, spline cutting and hot running-in, and specifically comprises the steps that surface cleaning is carried out on a spline shaft needing coating, and the spline shaft is placed into a drying bin to be dried after being cleaned; sand blasting is carried out through a sand-blasting machine; the spline shaft is moved to a heating bin to be heated; the spline shaft is dipped into a primer tank, and then is placed into the drying bin to be dried in a baking mode; the spline shaft is heated through a high-frequency heating machine; after the spline shaft is heated, the spline shaft is moved to a coating tank to be coated, and then is placed into a cooling tank to be cooled; after cooling is accomplished, a spline cutting machine is used for cutting the spline shaft, and finally the cut spline shaft is moved to a running-in platform to carry out running-in. According to the nylon resin spline, the technology that hot running-in is carried out after coating and cutting are accomplished is adopted, the sliding spline has high abrasive resistance, high and low temperature resistance and corrosion resistance, and has small sliding force and a small running clearance, reliability of a product is greatly improved, and the service life of the product is greatly prolonged.

Description

technical field [0001] The invention relates to a nylon resin spline coating method. Background technique [0002] The spline shaft assembly is one of the important parts of the automobile steering transmission device. In the past, the spline shaft and the spline sleeve of the vehicle spline shaft assembly were directly matched with steel parts. It is easy to produce jitter and abnormal noise, and the direction sensitivity is not high. Later, the spline shaft surface nylon coating process also appeared one after another, that is, the cold-drawn spline shaft after processing is directly coated with nylon on the surface, but the surface roughness of the spline shaft using this process is low, and it is different from the spline sleeve. The fit gap is uneven, and once the surface coating layer is run-in, it will directly affect the reliability and service life of the product. Contents of the invention [0003] The purpose of the invention is to overcome the deficiencies of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D3/00B05D1/38B05D3/02
Inventor 孙定凯陈伟孙祖明
Owner ZHEJIANG WANDA AUTOMOBILE DIRECTION MACHINE CO LTD
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