Method for cleaning machine-made component

A technology of components and cleaning media, applied in the direction of cleaning methods and appliances, chemical instruments and methods, etc., can solve problems such as limited effects, achieve the effects of reduced cleaning costs, improved cleaning efficiency, and good market application prospects

Inactive Publication Date: 2008-08-13
SICHUAN INST OF MATERIALS & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to reduce the cost of supercritical carbon dioxide cleaning and improve the cleaning efficiency and effect, at the end of the 20th century, the United States cooperated with many companies and research institutions to carry out the technology of strengthening supercritical carbon dioxide cleaning through magnetic stirring. The cleaning effect and efficiency of supercritical carbon dioxide can be improved to varying degrees under low pressure, but the effect is limited

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  • Method for cleaning machine-made component

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Experimental program
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Effect test

Embodiment 1

[0014] Fig. 1 is a schematic diagram showing the effect comparison between the cleaning method of the present invention and the conventional cleaning method for machined parts polluted by engine oil. The cleaning reaction conditions in the figure are: A 100°C, 10MPa; B 60°C, 10MPa; C 25°C, 10MPa; D 25°C, 7MPa.

[0015] It can be seen from the figure that under the four cleaning conditions of A, B, C and D, after the introduction of ultrasonic agitation, the cleaning ability of the supercritical carbon dioxide fluid to the residual oil on the surface of the parts has been significantly improved. The weight change of the sample before and after cleaning The data show that supercritical carbon dioxide under the action of ultrasonic waves cleans the engine oil on the surface of the sample very thoroughly, and the efficiency converted from the weighing data is about 100%. Oil in blind holes with internal threads in complex components is also efficiently removed during cleaning. Es...

Embodiment 2

[0017] Fig. 2 is a schematic diagram showing the effect comparison of drying and dehydration of wet filter paper and cleaning of residual coolant additive triethanolamine on the surface of machined parts by using the present invention and conventional methods. The cleaning reaction conditions in the figure are: A 10MPa, 60°C; C 10MPa, 60°C; B 15MPa, 60°C; D 10MPa, 100°C. It can be seen from the figure that the supercritical carbon dioxide can significantly improve the desiccation and drying ability of supercritical carbon dioxide on the moisture absorbed by the wet filter paper by ultrasonic stirring. . Static supercritical carbon dioxide at 60°C and 10MPa basically has no cleaning effect on triethanolamine, a common machining coolant additive. When ultrasonic waves are introduced to stir the cleaning, 57% of triethanolamine is removed from the surface of the cleaning sample by carbon dioxide. Increase the cleaning temperature to 100°C, and ultrasonic agitation makes the clea...

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Abstract

The invention provides a cleaning method for a mechanically processed part by replacing traditional organic solvent cleaning agent with supercritical carbon dioxide fluid medium, and intensifying cleaning effect by mixing the cleaning medium by using ultrasound wave during cleaning process. The pressure range of the supercritical carbon dioxide fluid is 8-30MPa, the temperature range is 40-150 deg C., and the cleaning period is 30-90 min. The ultrasound wave used for mixing is induced by three sets of energy-accumulating supersonic transducers which have a space included angle of 120 degree, and the power of each set of supersonic transducer is 200 Watt. According to the invention, residue material such as surface cooling fluid of the mechanically processed parts can be cleaned without generating organic cleaning waste liquor to pollute surroundings, and the cleaning efficiency is improved greatly.

Description

technical field [0001] The invention belongs to the technical field of cleaning of machined parts, and in particular relates to a cleaning method of machined parts. After machining, dirt such as cooling liquid remains on the surface of the machined parts and needs to be cleaned. Background technique [0002] Cleaning is an essential link after machining of machined parts. Traditional cleaning methods use organic solvents or a large amount of surfactants, and cleaning produces a large amount of waste liquid, which is likely to cause serious pollution to the environment. In the 1980s, the United States used supercritical carbon dioxide fluid for cleaning machined parts. Since supercritical carbon dioxide cleaning can not only recycle the greenhouse gas carbon dioxide, but also avoid the use of organic reagents and surfactants that are more harmful to the environment, the US government plans to use supercritical carbon dioxide as a new generation of green cleaning media in var...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B7/00
Inventor 杨维才罗文华张广丰
Owner SICHUAN INST OF MATERIALS & TECH
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