Method for milling and machining W-shaped proximate matter of large-scale thin-wall aluminum alloy composite material

Abstract

The invention discloses a method for milling and machining a W-shaped proximate matter of a large-scale thin-wall aluminum alloy composite material. The method comprises the following steps: (S01) measuring continuous milling temperature signals, milling force signals and milling vibration signals of a cutter under a milling amount parameter combination; (S02) measuring the wear of the rear cutter surface of the cutter at different milling time; (S03) acquiring regression equations and empirical formulae of the cutter life, the milling temperature, the milling force and the milling vibration; (S04) optimizing milling amount parameters; (S05) preferably selecting optimal geometric parameters of the cutter; (S06) cooling the cutter by virtue of an inert gas cooling device; (S07) milling and machining the W-shaped proximate matter of large-scale thin-wall aluminum alloy composite material by virtue of the inert gas cooling device, the cutter with the optimized geometric parameters in the step (S05) and the optimized optimal milling amount parameter combination in the step (S04). According the method, the process parameter combination is optimized, so that the wear rate of the cutter is reduced, a serious bonding failure condition of the cutter is restrained, the production cost is lowered, and the productivity is increased.

Description

Technical field [0001] The invention is a high-efficiency and heavy-load milling processing method of a large-scale thin-wall aluminum alloy composite material W-shaped profile, which belongs to the technical field of mechanical manufacturing of rail vehicle car bodies. Background technique [0002] Traditionally, aluminum alloys are generally classified as free-cutting materials. However, aluminum alloys have low hardness, high viscosity, strong chemical activity, and large plastic deformation. They are prone to irregular tool wear, tool bonding failure, and machined surfaces during production and processing. Problems such as serious burrs and extrusion marks have seriously affected the efficiency, quality and cost of aluminum alloy parts production. In the past ten years, the research on aluminum alloy high-speed and ultra-high-speed milling has been mostly based on frame, thin-wall and other structures. The machine tool speed used in milling is generally (15000~40,000) r / min. ...

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

Images