Process for surface treatment of internal wall of open-end spinning frame rotor

An air spinning machine and surface treatment technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of high cost, general economy, complex process, etc., and achieve low cost, significant economic benefits, and simple operation. Effect

Inactive Publication Date: 2012-06-13
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In terms of surface treatment process, the hardness of traditional chromium plating method can reach about 900HV; but trivalent chromium ion (Cr 3+ ) is harmful to the environment and is extremely difficult to remove in nature. It has been banned by European and American countries
[0006] The hardness of the traditional nickel plating method can reach about 850HV; the process is relatively complicated, the economy is average, and the surface hardness is still low, which is not suitable for the working requirements of the rotor above 100,000 rpm
[0007] The diamond electroplating method can reach about 1000HV; but the process is complicated, the cost is high, and the economy is poor

Method used

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  • Process for surface treatment of internal wall of open-end spinning frame rotor
  • Process for surface treatment of internal wall of open-end spinning frame rotor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The surface treatment process of the inner wall of the rotor of the air spinning machine is carried out according to the following steps:

[0026] 1) Machining, the roughness of the sliding surface and condensation groove is controlled at Ra0.7;

[0027] 2) Perform quenching treatment, heat to 800°C at medium speed, keep warm for 15 minutes, and then cool to room temperature in 20°C water;

[0028] 3) Then perform low-temperature tempering treatment, heat to 220°C at a medium speed (15-25°C / min), keep it warm for 12 minutes, and then air-cool to room temperature;

[0029] 4) Then carry out electroless nickel plating:

[0030] The process flow is: chemical degreasing→boiling water cleaning→chemical degreasing→boiling water cleaning→activation treatment→warm water cleaning→normal temperature deionized water cleaning→electroless plating→boiling water cleaning→drying→heat treatment→polishing.

[0031] In described electroless plating, the composition and content of electr...

Embodiment 2

[0037] The surface treatment process of the inner wall of the rotor of the air spinning machine is carried out in accordance with the following steps:

[0038] 1) Machining, the roughness of the sliding surface and condensation groove is controlled at Ra0.8;

[0039] 2) Perform quenching treatment, heat to 860°C at medium speed, keep warm for 20 minutes, and then cool to room temperature in 20°C water;

[0040] 3) Then perform low-temperature tempering treatment, heat at a medium speed to 230°C, keep warm for 12 minutes, and then air-cool to room temperature;

[0041] 4) Then carry out electroless nickel plating:

[0042] The process flow is: chemical degreasing→boiling water cleaning→chemical degreasing→boiling water cleaning→activation treatment→warm water cleaning→normal temperature deionized water cleaning→electroless plating→boiling water cleaning→drying→heat treatment→polishing.

[0043] In described electroless plating, the composition and content of electroless plati...

Embodiment 3

[0049] The surface treatment process of the inner wall of the rotor of the air spinning machine is carried out in accordance with the following steps:

[0050] 1) Machining, the roughness of the sliding surface and condensation groove is controlled at Ra0.9;

[0051] 2) Perform quenching treatment, heat to 900°C at medium speed, keep warm for 25 minutes, and then cool to room temperature in 20°C water;

[0052] 3) Then perform low-temperature tempering treatment, heat at a medium speed to 240°C, keep warm for 18 minutes, and then air-cool to room temperature;

[0053] 4) Then carry out electroless nickel plating:

[0054] The process flow is: chemical degreasing→boiling water cleaning→chemical degreasing→boiling water cleaning→activation treatment→warm water cleaning→room temperature deionized water cleaning→electroless plating→)boiling water cleaning→drying→heat treatment→polishing.

[0055] In described electroless plating, the composition and content of electroless platin...

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Abstract

The invention relates to a process for strengthening abrasive resistance of an internal surface of an open-end spinning frame rotor, with the purposes of effectively improving the internal surface hardness and prolonging the service life of the rotor and characteristics of convenience for operation and favorable economic performance. The technical scheme is as follows: the process for surface treatment of internal walls of the open-end spinning frame rotor comprises the following steps of: (1) machining to control the roughnesses of a glide plane and a collecting groove at Ra0.7-0.9; quenching the rotor by heating to 800-900 DEG C at the intermediate speed of 15-25 DEG C / min, keeping for 15-25min and cooling in water of 20DEG C to the ambient temperature; (3) then carrying out lower tempering treatment by heating to 220-240 DEG C at the intermediate speed of 15-25 DEG C / min, keeping for 12-18min, and then cooling in air to the ambient temperature; and (4) carrying out chemical nickel-plating, wherein the pH value is between 4 and 6, the temperature is 85 DEG C+ / -2 DEG C, and the time lasts for 2-3h.

Description

technical field [0001] The invention relates to a surface treatment process, in particular to a process for strengthening the wear resistance of the inner surface of a rotor of an air spinning machine. Background technique [0002] Air spinning, also known as rotor spinning, is the most widely used new spinning technology at present; it uses the high-speed rotating rotor 5 to complete the spinning, and the general shape of the rotor is as follows: figure 1 shown. The spinning mechanism is as follows: the fiber is transported into the rotor cup, and under the action of the centrifugal force of the high-speed rotation of the rotor cup, the fiber slides along the cup wall sliding surface 1 into the rotor coagulation tank 3, and condenses into fiber strands, which are twisted, Traction becomes yarn. The condensation groove generally consists of upper side 2 and lower side 4 . [0003] The higher the rotor speed in air spinning, the faster the spinning speed; as the spinning s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C21D9/00C21D1/18C23C18/36
Inventor 陈洪立胡旭东陈教壹武传宇杨西伟乔欣王丽敏刘宜胜
Owner ZHEJIANG SCI-TECH UNIV
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