Milling method for arc-shaped surface of carbon fiber joint

Abstract

The invention relates to the technical field of machining, and discloses a milling method for an arc-shaped surface of a carbon fiber joint. The milling method employs a mode of variable-swing-angle girder cutting, and proposes a technological strategy of side-edge large-allowance rough milling, large-cutting-amount semi-finish machining of bottom teeth and small-cutting-amount finish machining of the bottom teeth. During machining, rough and finish machining process allowance and machining parameters are reasonably distributed, the milling efficiency is integrally improved, meanwhile, simultaneous machining forming of the arc-shaped surface and the tangent ruled surface and stable milling of a carbon fiber large-curvature arc-shaped surface structure are achieved, a cutter connecting step of a transition area of the arc-shaped surface and the tangent ruled surface is eliminated, and the surface quality integrity of the arc-shaped surface of the carbon fiber joint is improved.

Description

technical field [0001] The present application relates to the technical field of mechanical processing, in particular to a method for milling arc-shaped surfaces of carbon fiber joints. Background technique [0002] Carbon fiber (material, Carbon fiber reinforced polymer, CFRP) is an advanced composite material composed of high-strength, high-modulus carbon fiber as a reinforced phase, and a fatigue-resistant and corrosion-resistant resin as a matrix phase. High strength and specific stiffness, low density, corrosion resistance, convenient processing and forming, etc., have been widely used and promoted in the field of aviation and aerospace, and have become the mainstream material for large load-bearing components. [0003] However, due to the great difference in physical and mechanical properties such as thermal conductivity and thermal expansion coefficient of the reinforcing fiber and the resin matrix, the cutting failure form is very different from that of metal materia...

AI Technical Summary

Problems solved by technology

The existing overall processing technology is truss cutting with fixed pendulum angle, that is, the relationship between the axis of the tool and the normal line of the profile is 5-10°, and the milling is carried out in the way of small depth of cut, small width of cut, and back and forth by using the bottom angle R of the tool (such as figure 1 shown), there is a problem of low surface processing efficiency; further, for large curvature arc surface structures with central angles greater than 90° (such as figure 2 As shown), the fixed pendulum truss cutting is carried out by adopting the method of segmenting the arc and segmenting the arc and the ruled surface. Due to the difference in the tool swing angle of different arc segments, there are local residues and knife-joining steps between the profiles of each segment. , affecting the overall surface quality of the profile

[0005] In summary, due to the problems of low processing efficiency and poor surface quality in the existing process schemes, it can no longer meet the needs of carbon fiber profile processing, and it is urgent to explore an efficient and high-quality general method for profile milling

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