In the traditional cutting process, in order to improve the machining quality and extend the tool life, a large amount of cutting fluid is usually used. In the 21st century, people began to advocate "green manufacturing" dry cutting technology without cutting fluid is favored, especially the development of tool coating technology makes the application of dry cutting is expanding. But practice has proved that in the difficult processing materials (such as heat resistant steel, stainless steel titanium alloy, etc.) and difficult processing processes (such as drilling, tapping, cutting groove, especially deep hole processing, etc.) in the cutting process, even if the use of coating tool for dry cutting still have some difficulties, therefore, it is necessary to develop a new cooling lubrication way. This topic about carbide cutting tools and small Quantity Lubrication (Minimum Quantity Lubrication, MQL) and air cooling cutting technology, combining of austenitic stainless steel cutting experiment research has important practical significance. The study on austenitic stainless steel ICr8Ni9Ti material, before using the blade and knife surface coated respectively after TiCN + Al_2O_3 and Al_2O_3 TiCN + + TiN coating cemented carbide blade, through the cutting experiment was carried out, analysis in dry cutting, different bearing fluid for MQL, low temperature cold wind, and the change rule of cutting force under the condition of low temperature MQL, on this basis, to choose the right condition, cooling and lubrication for tool wear test, emphatically analyzes the characteristics of tool wear and wear mechanism of chip morphology after test observation, analysis the mechanism of chip breaker.

Through the experiment of cutting austenitic stainless steel 1Cr18Ni9Ti by four kinds of coated carbide cutters, the influence of cutting parameters on cutting force was studied, and the cutting force of four kinds of cutters was compared and analyzed. The test results show that the back force is larger than the main cutting force when cutting with small feed and small back feed. With the increase of cutting speed, cutting force of YBC251 and GC2025 cutting tools decreases first and then increases. Compared with CVD coated carbide cutting tools, pvd-coated carbide cutting tools of the same type have significantly less cutting force than cvd-coated carbide cutting tools.

Posted by: hannahgwendolyn at 09:48 AM | No Comments | Add Comment
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