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Cooling method of round knife in cutting process
- Jan 21, 2019 -

Deformation of the chips during metal cutting, round knives and chips, and friction between the circular knives and the workpiece create a large amount of cutting heat, which causes thermal deformation of the workpiece, affecting the manufacturing accuracy and the service life of the circular knives. The goal of filling the cooling medium in the cutting production area is mainly to cool, lubricate, chip, and prevent rust prevention of the surface to be formed, thereby achieving the purpose of protecting the round knife, reducing the cutting heat, and enhancing the quality and productivity of the workpiece. The cooling methods for cutting can be roughly analyzed into three types: wet cast cooling, natural cooling, and dry cooling.

(1) Wet casting cooling In the cutting production, the cutting fluid (water-based, oil-based, etc.) is conveyed to the nozzle one after another by means of a low-pressure pump, etc., and the round knife and the workpiece are cleaned (filled), and the cutting fluid is rinsed. After filtering, it is used again and again. This feature is convenient and easy to use and is the most common one used today. However, splashing, evaporation and iron filings that cannot be avoided are easily produced as environmental pollution. According to the pouring mode, the wet casting is cooled and has various forms such as radial and lateral directions.

(2) In the cutting production, only relying on the natural environment cooling effect meets the production requirements. This is mainly for the current cutting process of cutting fluid cooling. In addition to the natural environment, the cutting production process does not add all the “touching” to complete the production mission, such as Traditional processing techniques for cast iron materials. Most of the conventional cutting is classified into this type. Generally, the cutting speed is controlled, the cutting amount is reduced, the productivity is reduced, and the cutting tool and the workpiece are cut in the range that the cooling can withstand, and the productivity is enhanced to various degrees. The ground relies on the use of a new material for the round knife, and the cutting efficiency of the round knife has not been achieved.

(3) Dry and sub-dry cooling cutting has no effect of pouring a large amount of fluid during wet cooling, and is not completely obeyed by the natural environment. It is an attempt to change the manufacturing and application of less natural media without contamination, and strengthen it during cutting. A new process developed by the functions of cooling, lubrication, etc. to enhance productivity. Dry cutting has many different cooling modes and cutting mechanisms depending on how much wet medium is used and the cutting speed. Compared with dry (sub-dry) cutting, the natural cooling method refers to the process of heat transfer to the low temperature zone and high heat to the periphery during the cutting process. The cold cooling is completed in the natural law, without artificial strictness and deliberate "touching". Craftsmanship. Compared to the casting cooling in the wet filling method, the jet cooling is an intensive cooling method in the dry and sub-dry cooling methods. It uses the cooling medium intuitively and “forced” into the cutting area to “concentrate”. It tries to change the natural medium with less pollution and no pollution, strengthen its cooling and lubrication functions, or achieve the preferred process parameters according to different manufacturing objects. Or exceed the production efficiency of casting cooling, thereby relatively reducing the degree of environmental pollution. The jet cooling is divided into three types: liquid jet, gas jet and mixed jet.