Environmental protection technology in the process

2022-09-28
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Environmental protection technology in automobile parts processing

protecting the earth's environment is the most priority topic in the 21st century. In the field of machining, the research and development of some environmental protection measures and their achievements have been widely used. Among them, the research on the main processing methods of saving energy and reducing waste, namely dry and semi-dry machining technology, is accelerating. It has been applied in milling and gear cutting, and achieved satisfactory results. However, in the hole processing of aluminum parts, especially aluminum parts, the tool breakage and processing accuracy deterioration caused by aluminum chip sticking to the tool need to be further studied and solved. At present, it is important to understand the model of electronic universal testing machine for hole processing of aluminum parts, and there are few examples of dry processing

a few years ago, Japan Seiji Co., Ltd. began to study the semi dry cutting technology of aluminum parts. Its research results are as follows: 3. The maximum amplitude of the actuator: 75mm (the stroke of the oil cylinder is 0 (1) 50mm), which has been used in 6 products and 7 production lines. This paper introduces the research results and practical examples of the company as follows

development trend of environmental protection technology

in the field of machining, there are various environmental protection technologies, which can be roughly divided into three categories: energy conservation, waste reduction, ensuring the safety and comfort of the working environment

in terms of energy conservation, there are: reducing the resistance of the hydraulic pipeline, reducing the specification of the cutting fluid pump and no hydraulics, etc. Usually, even if the rated power of the pump is very small, the power consumed by it is generally large, especially the power consumed by the cutting fluid accounts for more than 60% of the total power. Therefore, the above technology is practical and effective in saving energy

waste reduction mainly refers to reducing the amount of waste liquid of cutting fluid. All companies are committed to the development and application of technologies such as long-term and repeated recycling of cutting fluid. In the aspect of long-term (long-life) of cutting fluid, the synthesis of cutting fluid is one of the development projects. Because synthetic cutting fluid is based on chemically synthesized oil, full attention should be paid to its affinity with water, and the molecular weight can be artificially designed. Because the mixture of metal ions such as calcium and other oils leads to the deterioration of surfactant, oil-water separation is a controllable advantage; At the same time, full attention should also be paid to the adverse effects on the equipment (such as the impact on the electrical system caused by the washing off of the lubricating fluid of the sliding part and the leakage) and the treatability of wastewater

in terms of ensuring the safety and comfort of the working environment, the company is currently committed to the research on the chlorine dissociation of cutting fluid. Chlorine compounds, as high-pressure lubricating oil additives, are contained in high-load cutting fluids, which can produce toxic substances during high-temperature cutting and waste oil combustion treatment. Therefore, chlorine cutting fluids have been abolished from JIS standards. At present, each cutting fluid is 4 Automatic speed change: during the experiment, the speed of moving the beam can be automatically changed according to the preset program. The manufacturer is carrying out the research and development of chlorine dissociation to continuously improve the new cutting fluid with the same performance as the original cutting oil

main ideas for the development of dry cutting technology

considering that there are many aluminum workpieces, and some hole machining tool manufacturers and scientific research institutions have few examples of the development of dry cutting technology, the company decided to conduct its own research and development, taking the drilling, tapping, reaming and boring methods of aluminum workpieces as the research and development goal. In dry cutting, semi dry cutting with excellent lubrication, cooling and chip removal performance is selected. The supply mode of mist cutting agent takes the external mixing and internal supply mode as the main content of research and development. Compared with the internal mixing method advocated by Hermes, the external mixing method can supply less spray. However, the development of the spray generation part, as the core of the technology, has a large degree of freedom, and the internal structure of the spindle does not need to be greatly changed. Therefore, it can be used on the equipment produced by all manufacturers

the cutting efficiency (feed speed f) and machining accuracy are still in the research stage, and the final result is that the efficiency and accuracy should be better than wet cutting. The company sets the target value based on the standard inspection procedures at home and abroad

technology development

1 spray generation and supply technology

classification items

spray generation stable spray generation not affected by tool specifications

increase the production of spray

control the spray volume and spray pressure

spray supply control the condensation of spray in the pipeline

reduce the pressure loss of spray

maintenance and management spray generation status monitoring and abnormal status detection

generally, spray is generated by blowing oil away with the help of air pressure in the venturi nozzle. The generating capacity of spray is mainly related to the air pressure difference (hereinafter referred to as differential pressure) before and after the venturi nozzle. However, due to the small diameter of the oil hole (o/h below) of the small diameter tool, sufficient differential pressure cannot be ensured, and the amount of spray decreases greatly. To overcome this shortcoming, sometimes part of the spray (only the air part) is discharged to ensure sufficient differential pressure, but air is wasted. In addition, due to the discrete control, the accurate control of each tool cannot be carried out. Because the o/h cross-sectional area is different, the differential pressure changes, and the spray amount is very unstable. In order to solve this problem, the structure of dispersing the oil agent laterally has been developed to ensure that a special venturi with large spray capacity can be obtained even under the condition of small differential pressure, and a new technology that can maintain a constant (stable) differential pressure even under the condition of different o/h cross-sectional areas. The characteristic of this technology is that it is not limited by the specification of tools and can stably ensure the supply of spray lubricant. In addition, after abolishing the elbow joint piping, the technology adopts air increaser and intermediate buffer measures to minimize the pressure loss of spray lubricant and the condensation of lubricant, (3) the running distance improves the chip removal performance. 2 drilling processing

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