Milling method of graphene aluminum matrix composite material

Abstract

The invention relates to a milling method of a graphene aluminum-based composite material. A PCD milling cutter is adopted for processing, has the rotation speed of 10,000-18,000r / min, has the feed amount of 0.05-0.15mm / r, and has the cutting depth of 0.1-0.3mm; the radial run-out, the end surface run-out and the axial float of a machine tool spindle are less than 0.02mm. By the method, the low-cost, efficient and high-precision milling of the graphene aluminum-based composite material is realized by selecting the PCD milling cutter and reasonable processing technological parameters, so that the dimensional tolerance of the graphene aluminum-based composite material can reach 5 microns, the surface roughness can reach Ra0.8, and the yield of the graphene aluminum-based composite material can be enhanced to 95%.

Description

technical field [0001] The invention relates to the field of cutting processing technology, in particular to a milling processing method of a graphene-aluminum matrix composite material. Background technique [0002] Graphene aluminum matrix composite material has high strength (bending strength ≥ 550MPa), good wear resistance, light weight (density is only 2.9-3.0g / cm 2 ), high thermal conductivity, etc., can be used in products such as electronic packaging materials, and is widely used in the aerospace field. The structural parts of graphene-aluminum matrix composites generally need to be further processed in the inner shape after the blank is formed. At present, electrolytic machining is usually used for the processing of graphene-aluminum matrix composites, but electrolytic machining has disadvantages such as high cost, low efficiency, difficulty in processing heterogeneous curved surfaces and cavities, and high difficulty in controlling the relative position and size o...

AI Technical Summary

Problems solved by technology

At present, electrolytic machining is usually used for the processing of graphene-aluminum matrix composites, but electrolytic machining has disadvantages such as high cost, low efficiency, difficulty in processing heterogeneous curved surfaces and cavities, and high difficulty in controlling the relative position and size of workpieces. Therefore, the surface finish of the processed product is poor, and the product qualification rate is low

[0003] In order to improve the processing efficiency and product qualification rate of graphene-aluminum-based composite materials, the applicant thought of using machining methods for processing, and used ultra-fine tungsten steel milling cutters and cubic boron carbide milling cutters for actual verification. But the verification effect is not ideal

Although the processing efficiency has been improved, due to the high overall strength of the graphene-aluminum matrix composite material, which has good wear resistance and contains silicon carbide, factors such as cutting force during machining can easily cause open mechanical damage to the product. Damage (for example, the workpiece is prone to extrusion cracking), greatly reducing the performance of the product, the tool wear is serious, and the aluminum base is easily partially melted due to the generation of cutting heat, and the chips are easy to stick to the tip of the tool and form on the surface of the workpiece. A large number of built-up edge, it is difficult to meet the size requirements of the product, and the surface roughness of the workpiece is poor, the product qualification rate is only 40%, and mass production cannot be realized

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