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In the process of aluminum alloy cutting, the concentration, pressure, and flow rate of emulsion have a significant impact on the machining quality of components.
During tapping, the workpiece is severely squeezed by the tool, so it is appropriate to select Cutting fluid with extreme pressure additive concentration of 8%~10%.
The cooling system of the machine tool is composed of cooling water tank, filter, pump (high pressure, low pressure), water pipe, nozzle, seals, etc., to increase the pressure of Cutting fluid, and relevant connecting components need to be matched with high-pressure components. Generally, CNC machine tools are equipped with ordinary chip punching cooling systems, and when processing requirements are high, a central cooling system is selected. The Cutting fluid required by common chip punching can select the parameters of small pressure and large flow to timely move the cutting belt and the chips attached to the workpiece, guard board and fixture.
The general pressure parameter for ordinary chip cooling is 0.04-0.06MPa. The central cooling system uses a high-pressure pump. The high-pressure Cutting fluid passes through the center of the spindle, then passes through the tool body, and is sprayed directly to the cutting position of the tool. The high-pressure water is used to break chips, and the chips in the narrow space are forcefully flushed out, thus playing the role of chip breaking, cooling, lubrication, and chip punching. The central cooling system can be divided into four levels according to the selection of pressure: low pressure, medium pressure, high pressure, and ultra-high pressure.
3. Flow of Cutting fluid
The washing action of Cutting fluid washes the chips left on the workpiece, cleans and cleans the fixture, and takes away the cutting heat. Generally speaking, the larger the flow of Cutting fluid, the more obvious the chip washing effect and the better the cooling effect. However, the larger the flow, the larger the water tank capacity required to store Cutting fluid, and the corresponding increase in manufacturing costs and equipment floor area. Therefore, the larger the flow of Cutting fluid is, the better it is. The smaller the flow, the better it should be under the condition of satisfying the working conditions, so as to reduce the total cost. In order to facilitate heat dissipation and supply sufficient Cutting fluid, the capacity of the water tank shall be 3-5 times of the flow of the system cooling pump.
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