Processing method of milling large thin-walled aluminum alloy composite W-shaped profile

Abstract

The invention discloses a processing method for milling a W-shaped profile of a large thin-walled aluminum alloy composite material, comprising the following steps: S01, measuring the continuous milling temperature signal, milling force signal and milling vibration signal of a tool under the combination of milling parameters; S02: Measure the tool flank wear of the tool at different milling times; S03: Obtain the regression equation and empirical formula of tool life, milling temperature, milling force and milling vibration; S04: Optimize the parameters of the milling parameters; S05: Optimize the tool Optimum geometric parameters; S06: Cooling the tool through an inert gas cooling device; S07: Using the tool with the optimized geometric parameters in S05 and the optimized optimal milling parameters in S04, through the inert gas cooling device, the large thin Milling processing of W-shaped profile of wall aluminum alloy composite material. The combination of optimized process parameters in the invention reduces the tool wear rate, suppresses the serious bonding failure of the tool, reduces production cost and improves productivity.

Description

technical field [0001] The invention relates to a high-efficiency heavy-duty milling processing method for a W-shaped profile of a large-scale thin-walled aluminum alloy composite material, and belongs to the technical field of rail vehicle body manufacturing in mechanical manufacturing. Background technique [0002] Aluminum alloys are traditionally classified as easy-to-cut materials. However, aluminum alloys have low hardness, high viscosity, strong chemical activity, and large plastic deformation. During production and processing, irregular tool wear, tool bonding failure, and machined surface are prone to occur. Problems such as serious burrs and extrusion marks seriously affect the efficiency, quality and cost of aluminum alloy parts production. In the past ten years, the research on high-speed and ultra-high-speed milling of aluminum alloys has focused on structures such as frames and thin walls. Research on heavy load and powerful milling at medium and low speeds (2...

AI Technical Summary

Problems solved by technology

Tool life is generally low. For example, powder metallurgy high-speed steel will fail within a few minutes of milling, and cemented carbide tools will often fail due to severe bonding of the tool within 30 minutes of milling;

[0005] 3. Poor surface quality

[0006] 4. The machine tool used by the enterprise is a special milling machine tool for aluminum alloy, and its own cooling system belongs to the minimal lubrication cooling, so the tool cannot be fully cooled, the milling temperature is at a high level, and the tool is prone to serious bonding after milling for a period of time Happening;

[0007] 5. During layered milling, the thin-walled ribs are easily interrupted by the tool, so in actual processing, only a large depth of cut can be used to mill out the processed surface at one time

[0008] 6. The effect of conventional cooling and lubricating fluid is not ideal, and the company actually uses expensive imported cooling fluid (300 yuan / liter), which further increases production costs

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