Precise processing method of ceramic fiber rigid thermal insulation tile for aerospace plane

Abstract

The invention relates to a processing of a thermal insulation tile, and specifically relates to a precise processing method of a ceramic fiber rigid thermal insulation tile for an aerospace plane. The method substantially comprises the steps of centering a four-axis rotary table, mounting and centering a four-claw chuck, defining a four-axis rotation center and a height, setting cutter tools, adjusting digital-analog and generating a program, splicing and clamping the thermal insulation tile, rough processing, semi-fine processing, fine processing, processing splicing surfaces, and the like. The method well solves the problems that the cutter tools are badly abraded, the drilled holes are layered and deformed, or the like, in the processing process; the processing precision is greatly increased comparing to the prior art, and the processing precision can be 0.01mm or even higher; and the processing efficiency is essentially promoted; accordingly the manpower resource is saved, the rate of finished products is higher, and unnecessary loses are avoided.

Description

technical field [0001] The invention relates to a processing method of heat-insulating tiles, in particular to a precision processing method of ceramic fiber rigid heat-insulating tiles for aerospace aircraft. Background technique [0002] Ceramic fiber rigid heat insulation tiles are mainly covered on the outer surface of aerospace aircraft and are used for heat protection in high-speed flight environments. The product is required to have a high-precision and complex three-dimensional curved surface so that it can be completely attached to the surface of the aircraft. However, ceramic fiber insulation tiles can only be formed in a relatively regular shape at one time during production, and cannot realize all design features. A large amount of secondary machining is required to complete the remaining design features. The main secondary mechanical processing of rigid insulation materials includes complex curved surface processing, special shape cutting processing, blind groov...

AI Technical Summary

Problems solved by technology

[0003] 1. The tool wears seriously during the processing and the durability is low

Due to the soft material, the machining area cannot be cooled with coolant during the machining process, and the heat conductivity of the material itself is poor. The heat generated during the cutting process causes the temperature of the cutting area to be too high, and the heat is concentrated in a very narrow area near the cutting edge. Inside, the rebound of fiber and powdery chips are easy to scratch the cutting edge and flank, so the wear of the tool is very serious, the flank is prone to groove wear, and the durability is low

[0004] 2. Residual stress generated during processing

[0005] 3. It is difficult to clamp materials

Due to the characteristics of the material itself, the density and strength are low, the use of traditional clamping methods can easily damage the internal structure of the material and affect the performance of the material itself

[0006] 4. The processing efficiency is low and the processing time is long

Too fast feed speed and too large cutting amount during processing may easily cause excessive force on the material and seriously reduce the material performance or even scrap it. Therefore, a lower feeding speed and smaller cutting amount must be used during processing to ensure The material performance is not damaged and the processing accuracy of the material