Double-sided precision machining method for large-plane thin-walled parts

Abstract

The invention relates to the technical field of double-sided machining of high-precision large-plane thin-walled parts in complicated shapes, and provides a double-sided precision machining method for large-plane thin-walled parts based on a gluing method. By the aid of the gluing method using double-sided adhesive tapes, reliable clamping for the large-plane thin-walled parts in the complicated shapes can be ensured, and clamping stress can be decreased, so that the parts are precisely machined. A workpiece and a fixture plate well contact with the double-sided adhesive tapes by means of cleaning a bonding surface, rolling the bonding surface with a rolling rod and the like, infiltration of cutting fluids is prevented during machining by means of coating silicon rubber on the periphery of the workpiece to realize sealing, and organic solvents can rapidly infiltrate into the double-sided adhesive tapes to shorten adhesive removing time by arranging an infiltration groove on a workpiece plate in advance. By the aid of the machining method of high-speed milling, optimal process parameters for ensuring machining precision and machining efficiency and decreasing deformation of the workpiece are determined.

Description

technical field [0001] The invention relates to the technical field of double-sided processing of high-precision large-plane complex-shaped thin-walled parts. Background technique [0002] For large flat and thin-walled parts that need to be processed on both sides, due to the large size, complex shape, and high precision requirements during processing, especially when processing the second surface, due to the boss features on the first surface and the need to process Influenced by factors such as thin workpiece thickness, there are great difficulties in the existing clamping positioning and processing. [0003] The prior art adopts vise, thread pressing or pressure plate pressing, and the clamping force is large and unevenly distributed, which easily causes deformation of the workpiece and uneven distribution of clamping force, and cannot guarantee the accuracy of the parts. Using vacuum adsorption fixtures, for thin plates with a large number of grooves and bosses, fixtur...

AI Technical Summary

Problems solved by technology

[0002] For large flat and thin-walled parts that need to be processed on both sides, due to their large size, complex shape, and high precision requirements during processing, especially when processing the second surface, due to the boss features on the first surface and the need to process Influenced by factors such as thin workpiece thickness, there are great difficulties in the existing clamping positioning and processing

[0003] The existing technology adopts vise, thread pressing or pressure plate pressing, and the clamping force is large and unevenly distributed, which is easy to cause deformation of the workpiece and uneven distribution of clamping force, and cannot guarantee the accuracy of the parts

Using vacuum adsorption fixtures, for thin plates with a large number of grooves and bosses, fixture design and vacuum adsorption are more difficult, and because the parts are thin, the parts are difficult to clamp if the adsorption force is small, and the parts will be deformed if the adsorption force is large

There are also technical reports disclosing the method of using liquid glue such as 502 glue, but because the glue is a fast-curing liquid solvent, it is difficult to operate when applying glue on a large area, the coating is uneven, and the bonding effect is not ideal.

[0004] In terms of processing, ordinary CNC processing equipment is used, the milling force is large, the parts are easy to deform, and because of the thin plate thickness and the existence of fine grooves, sometimes it is necessary to use small diameter tools for processing, the tool line speed is low, the processing is difficult, and it is difficult to guarantee Processing accuracy and processing efficiency

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