1. Melting process of alloy vermicular graphite cast iron for brake disc (1) Raw materials and chemical composition Pig iron, scrap steel, return charge, Si, Mn, Mo, Cu, Ni, Vermicular Agent and other ferroalloys are selected according to the chemical composition of the furnace charge. Q10 or Q15 pig...
The microhardness of the machined surface was measured by MH- 6 microhardness tester. During the test, the pressure load was 100g, and then the pressure was kept for 10s. The microhardness is calculated according to the grip = 0.1891XF/D2, where f (n) is the load and d (mm) is...
The surface roughness is measured by using the TR200 handheld roughness meter of Beijing Times Instruments, and the roughness is expressed by the arithmetic average deviation Ra of the machined surface profile. 12 groups of surface roughness values are measured under each cutting parameter, and the average value is...
At the end of the experiment, the machined surface of the workpiece was observed by Keynes laser microscope (VK-X200K). In the process of observation, it is found that the cutting speed has little effect on the surface morphology, while the feed rate has a great influence on the surface...
The blade used in the experiment is monolithic PCBN and the binder is A1. Figure 1 shows the energy spectrum of the matrix and the weight percentage of each element in it. (1) rake face. At the end of the experiment, the SEM observation of the rake face after...
In the process of cutting, the heat in the cutting area gradually accumulates at the arc of the tool tip, and the crescent depression wear occurs on the front edge and the back face also appears. Under each parameter, the maximum wear depth of crescent depression wear does not...
PCBN cutters can be used for rough machining to improve machining efficiency, or finish machining to improve surface quality. This experiment is located in finishing, the machine tool is DAEWOOACE-V500, using dry symmetrical milling, figure 1 is the milling schematic diagram. The cutterhead model is R220.74mur0100mur09Mei8 and the diameter...
The source of cutting force is the resistance of the tool to overcome elastic deformation, plastic deformation and friction. The influence of cutting speed on cutting force is in two aspects: on the one hand, with the increase of cutting speed, chip deformation and friction increase, cutting force increases,...
The experiment was carried out in the DAEWOOACE-V500 vertical machining center. The schematic diagram of orthogonal milling is shown in figure 1. In the experimental process of the edge inclination angle of the tool used in this experiment, only one cutting edge participates in the cutting, and the cutting...
In orthogonal turning, only one straight cutting edge is involved in the cutting, and the cutting edge is perpendicular to the cutting speed direction. The three-dimensional orthogonal turning model is established by using AdvantEdge and ABAQUS simulation software respectively, and the finite element simulation is carried out by using...