Turning method of long and thin-wall composite shell formed by metal and FRP

Abstract

The invention discloses a method for turning a long and thin-walled composite shell formed by metal and FRP, which comprises the following steps: 1) rough turning the outer circle of the FRP; 2) rough turning the two ends of the shell; 3) finishing turning the outer circle of the FRP; 4) The two ends of the finish car shell, the inner hole and the annular groove. The invention adopts the rough and finish machining process, reasonably distributes the process margin, and controls the deformation; controls the precision of the inner hole of the metal shell, and serves as the processing benchmark of the composite structural parts; uses plugs and soft claws for clamping to reduce clamping deformation ;Through the cooling method of low-temperature cold air, the cutting environment is improved; the cutting tools and cutting parameters in the cutting process are stipulated to improve the tool life and processing efficiency of the product. The process method of the invention is reasonable and reliable, the product has little deformation, and can effectively guarantee the processing quality of the composite shell.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and more specifically relates to a turning method of a long and thin-walled composite shell formed of metal and glass fiber reinforced plastics. Background technique [0002] In recent years, with the continuous advancement of science and technology, material technology has developed rapidly. As a new type of material, composite material has gradually become one of the leading materials in the 21st century. Composite materials have the characteristics of light weight, high specific strength, specific modulus, corrosion resistance, high temperature resistance, and ablation resistance. They are ideal materials for weapons such as aircraft, missiles, and aerospace vehicles. "Metal + composite material" is a kind of structural parts that are relatively common in certain types of products. At present, it is mainly manufactured by winding, packaging and other technologies, and glass fiber reinforc...

AI Technical Summary

Problems solved by technology

[0006] (2) The rigidity of the part structure itself is poor, and there is clamping deformation during machining;

[0007] (3) Due to the requirements of material performance, cooling fluid cannot be used in the processing process after glass winding, and the tool wears seriously, causing the size to be out of tolerance;

[0008] (4) During the processing, the cutting force is large, the cutting temperature is high, the tool wear is serious, and the product accuracy is not easy to control;

[0014] The machining process of parts mainly involves the processing of inner and outer circles and end faces. The rough and finish machining of outer circles and inner holes is not controlled, which affects the accuracy of the subsequent composite shell. The size that needs to be coordinated increases and the turning difficulty increases, which directly leads to the subsequent wall thickness. uniform, unable to meet the design index; the rigidity of the part is poor, and the direct clamping of the outer circle turning is very easy to cause clamping deformation, which affects the wall thickness and dimensional accuracy; the compressed air is at room temperature, which has limited function in reducing the cutting heat of the tool, and cannot achieve cooling Fluid Functional Requirements

Images