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China's auto industry has huge market demand. In the process of automobile manufacturing and auto parts production, many parts cleaning processes have improved with the development of technology and environmental protection requirements, and also put forward higher requirements for cleaning equipment and cleaning agents. How to adapt and meet the production process requirements is a key part when recommending cleaning agents.
What are the general requirements for metal cleaning of automotive parts?
(1) The cleaning speed is fast, and the metal surface dirt can be completely removed during the cleaning time set by the cleaning process.
(2) Non-corrosive to the cleaning machine and the parts to be cleaned
(3) Low cost of cleaning agent, environmental protection, mild smell
(4) During the cleaning process, no insoluble matter remains on the surface of the cleaning object, no new dirt is generated, and a new coating layer which is harmful to the subsequent process is not formed, and the product quality is not affected.
According to the cleaning requirements, it is necessary to meet the process requirements to achieve a satisfactory cleaning effect. The cleaning equipment and cleaning methods, the material of the cleaning parts, the type of dirt on the surface of the parts, and the next process, water quality, and workshop environment must be fully considered.
Commonly used metal cleaning equipment includes: 1. Immersion cleaning 2, spray cleaning 3, high pressure spray cleaning, 4, ultrasonic cleaning
The parts that are generally cleaned for immersion cleaning are multi-cavity. The cleaning agent is required to have a strong cleaning ability. The defoaming performance of the cleaning agent is not high, but the cleaning agent is required to have a certain ability to emulsify miscellaneous oil. The miscellaneous oil that is not cleaned after the parts are cleaned and taken out of the cleaning agent contaminates the surface of the parts. The disadvantage of the cleaning agent with strong emulsification oil is that the cleaning ability of the cleaning agent is gradually reduced, resulting in a short service life of the cleaning agent.
Most of the parts of the automobile transmission are cleaned by a through-type spray cleaning machine, which is generally divided into three processes of cleaning, rinsing and drying, which are individually changed according to the process requirements, cleaning-cleaning-rinsing-drying or cleaning-rinsing-rinsing- Drying, the spray cleaning machine is equipped with an oil skimmer, and the cleaning agent with strong anti-oil resistance can improve the service life of the cleaning agent. The material of the gearbox parts to be cleaned is generally forged steel. The dirt on the surface of the parts is mostly low-viscosity cutting oil. When cleaning agent is selected, the defoaming ability of the cleaning agent should be considered while considering the cleaning ability. Under normal circumstances, with cleaning When the temperature of the agent is increased, the decontamination ability is also increased, but after a certain temperature, the decontamination ability is decreased, and an optimum temperature range is considered when recommending the cleaning agent. On the other hand, since the concentration of the rinse cleaning agent is generally low, ranging from 0.5% to 1.5%, the cleaning agent is required to have a good rust preventing ability.
The high-pressure spray cleaning machine is mostly used to remove the surface dirt of the parts while removing the burrs on the metal surface. The positioning and spot-spraying methods are adopted for the parts, and the cleaning agent is required to have a good resistance to foam under high pressure.
Under certain process conditions, it is necessary to consider the influence of the subsequent process when recommending the cleaning agent, such as a certain process in the gearbox shaft and tooth production: grinding tooth-spray cleaning (intermediate cleaning)-shot blasting-spray cleaning (final Washing, in which the middle of the spray cleaning process should consider the next shot blasting process. After the cleaning agent cleaning parts are dried, the surface of the parts should not have any adhesive cleaning agent residue or cover film, otherwise it will affect the shot blasting process and bring quality defects. . In this customer's choice of cleaning agent, Quaker relies on years of professional experience and perfect service system. After several cleaning agent brands are compared, the intermediate spray cleaning machine adopts QUAKERCLEAN520CNI to meet the process requirements, ensuring the product. the quality of.
If you have a condition, it is recommended to use deionized water for the cleaning agent. There are a large number of heat treatment processes in the process of shaft and tooth processing. Deionized water can guarantee the quality of mass production and reduce the scrap rate of heat treatment process. Because the workpiece needs to be cleaned before the workpiece enters the heat treatment equipment, the purpose of the cleaning is to remove the particulate impurities on the metal surface, and to minimize the residue of the salt component to improve the quality of the heat treatment. Therefore, the use of deionized water for dosing, which can greatly reduce the impact of various types of ion residues in the water on the heat treatment surface has a bad effect on the heat treatment. Deionized water is also very beneficial to the cleaning equipment. The cleaning machine generally has a high cleaning temperature of 50-60 degrees, and the water evaporates faster. During long-term use, it was found that there was a significant scaling problem on the inner wall of the washing machine using tap water. When the electric heating washing machine was used, the heating rod would also burn the heating rod due to the accumulation of scale for a long time. A washing machine with a filter bag filter often blocks the filter bag due to evaporation of inorganic salt substances in the water, so that the filter bag is frequently replaced. In addition, deionized water is also good in cleaning parts and rust. Of course, the rust problem involves many factors: cleaning agent rust resistance, storage location humidity, ambient temperature, workpiece surface cleanliness, packaging and so on. From the water point of view, deionized water is very good for rust prevention because of its low electrical conductivity and the content of chloride ion and sulfate ion in water is much lower than that of tap water.
We all know that cleaning agents are mainly used to remove coolant, cutting oil, grinding ash, metal particles, etc. on the surface of the workpiece, and provide short-term rust prevention. The anti-rust ability of general cleaning agents is not enough to prevent rust between processes in the workshop conditions with high humidity and high temperature, especially in the case of high humidity and high temperature in summer workshop.
With the advancement of technology and the requirements of environmental protection, new, efficient, professional and environmentally friendly cleaning agents must be the future development trend. In the metal processing industry, according to the characteristics of metal materials, the cleaning agent is no longer a simple decontamination effect. For example, the cleaning agent can effectively prevent decontamination and can resist the rust of the metal film and enhance the resistance of the product. Corrosion ability, etc., which puts higher requirements on the additives added to the cleaning agent.
A well-known compressor manufacturer quickly rusted after parts were cleaned during the process.
The customer replaced the QUAKERCLEAN® 830 BF with ultra-low foam and high rust resistance. After trialing according to Quaker's management and maintenance program, it meets the customer's anti-rust requirements between processes. In addition, this product has been recognized and praised in many enterprise application processes.
But we always know that there is no perfect metal cleaning agent in the world. When choosing a cleaning agent, we must fully consider the impact of various related aspects. Quaker Chemical as your partner can help you choose the right product and optimize you. Management and maintenance program.