A double-sided precision machining method for large flat thin-walled parts

Abstract

The invention relates to the technical field of double-sided processing of high-precision large-plane complex-shaped thin-walled parts. The technical problem to be solved is to provide a double-sided precision machining method for large flat thin-walled parts based on the gluing method, which can ensure reliable clamping and reduce clamping stress to meet the precision machining of such parts. The invention adopts double-sided adhesive bonding method to realize reliable clamping of thin-walled parts with large plane and complex shape, and reduces clamping stress; adopts methods such as cleaning the bonding surface and rolling the bonding surface with a rolling rod to make the workpiece, tooling plate, etc. Good contact with double-sided adhesive; apply silicone rubber around the workpiece for sealing to prevent the infiltration of cutting fluid during processing; adopt the method of pre-opening the permeation groove on the workpiece plate, so that the organic solvent can quickly penetrate into the double-sided along the permeation groove The inside of the surface glue shortens the time of glue removal; the processing method of high-speed milling is adopted to determine the best process parameters that can not only ensure the processing accuracy, reduce the deformation of the workpiece, but also ensure the processing efficiency.

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. technical background [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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