Processing method of complex curved surface honeycomb

Abstract

The complex curved surface honeycomb machining method is suitable for machining a product of an aviation thrust device, the product comprises a to-be-machined area and a non-machined area, and the machining method comprises the steps that S1, UG-NX software is used for optimizing a 3D model of the product; s2, outputting a product processing tool path by utilizing UG-NX software; s3, virtual simulation is carried out on the tool path, computer debugging is carried out, and cutting parameters and technological parameters are obtained; and S4, the product is fixed through a preset tool clamp, numerical control is adopted for cutting machining, a final product is obtained, and the machining efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of product processing method for aviation, and particularly relates to a processing method of complex curved honeycomb. BACKGROUND

[0002] The typical product of the thrust reverser device of an aero-engine generally adopts a resin-based composite material and a honeycomb core laminated structure, and the typical components thereof include a skin, a honeycomb, an inlay and the like which are connected together through gluing, the processing appearance of the composite material honeycomb includes a profile, a profile edge and a groove cavity and the like, since the anisotropy of the composite material honeycomb core is strong and the in-plane stiffness of the honeycomb core is low, the cutting force generated in the processing process is extremely easy to cause processing defects such as honeycomb wall collapse, honeycomb core grid shape deformation, honeycomb wall burr and honeycomb wall tearing, and meanwhile, when the processing is performed through the gluing method, the thickness of the double-sided adhesive changes in the processing, thereby causing the height unevenness between different passes of the honeycomb core milling surface, and the processing efficiency is relatively low.

[0003] In view of this, the application is provided. SUMMARY

[0004] The processing method of the complex curved honeycomb provided by the application solves the technical problem of low processing efficiency of the traditional method for the product for aviation. The technical solution of the application has many technical advantages, which are described as follows:

[0005] The application provides a processing method of complex curved honeycomb, which is suitable for processing of a product of a thrust device for aviation, the product comprises a to-be-processed region and a non-processed region, and the processing method comprises the following steps.

[0006] S1: using UG-NX software to perform optimization processing on a 3D model of the product;

[0007] S2: using UG-NX software to output a product processing tool path;

[0008] S3: performing virtual simulation on the tool path and carrying out on-machine debugging to obtain cutting parameters and process parameters;

[0009] S4: fixing the product through a preset tool fixture and performing cutting processing by using numerical control to obtain a final product.

[0010] Compared with the prior art, the technical solution provided by the application has the following advantages:

[0011] The application has the advantages of simple structure, convenient operation, high reliability, wide application range, fast realization of repeated positioning of complex curved honeycomb core grids, realization of complex curved honeycomb core grid processing problems, reduction of processing preparation time by nearly 50% compared with the general processing method, and great improvement of production preparation efficiency. The application can be widely applied in the fields of product processing tool optimization, complex curved surface repeated positioning and improvement of product processing efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 Front sectional view of the invention. Detailed Implementation

[0014] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0015] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this invention, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0016] like Figure 1 The processing method for complex curved honeycomb surfaces shown is applicable to the processing of products for aerospace thrust devices. The products include areas to be processed and areas not to be processed. Preferably, the processing method uses a composite material-hyperbolic honeycomb structure. The processing method includes...

[0017] S1: Use UG-NX software to optimize the product's 3D model. Specifically...

[0018] The irregular surface in the product (including single curved surface, double curved surface and the like on the product) is optimized by using UG-NX software, including re-establishing the 3D model of the product by using the stitching method and the patching method, and removing the modeling parameters, that is, the irregular surface in the product which influences the tool path is optimized and improved by using the NX software, and the 3D model of the product is re-established; the model is constructed by using the stitching, patching and the like commands, and the modeling parameters are removed to output the model.

[0019] S2: The tool path route of the product is output by using UG-NX software, specifically,

[0020] The tool path auxiliary surface and curve are constructed by using the expansion command or the bias command according to the design standard after the product 3D model is de-parameterized, the rough machining and finishing tool paths are obtained by using the variable profile milling method and the fixed profile milling method, and the cutting parameters and process parameters are pre-set.

[0021] S3: The tool path is virtually simulated and debugged on the machine to obtain the cutting parameters and process parameters, specifically, the simulation model is constructed by using the virtual simulation software, the machine tool model is configured, the output tool path is simulated, if the simulated tool path exceeds the threshold value, the tool path information result is fed back to the UG-NX software for re-optimization until the tool path is within the threshold value, and the final tool path file is output after optimization and is run in the numerical control machine tool.

[0022] S4: The product is fixed by the pre-set tooling fixture and is cut by numerical control to obtain the final product, specifically, the product is a honeycomb core, a threaded hole is arranged in the non-machining area of the honeycomb core, and the pre-set tooling fixture includes a base 1, an outer ring pressing plate 3 and an inner pressing plate 2 with a special-shaped structure, wherein,

[0023] The central area of the base 1 is provided with an arc-shaped protrusion which is matched with the inner cavity surface structure of the honeycomb core and can support the honeycomb core; the outer ring pressing plate 3 is continuously arranged along the edge positions of the top surface of the honeycomb core and is fixed by screws to fix the edges of the honeycomb core; the non-machining area in the area surrounded by the outer ring pressing plate is attached by the inner pressing plate 2 and is fastened by screws, and only the machining area is exposed. The fixture constraints and clamps the product, accurately cuts the product, and places the honeycomb core on the base according to the product design requirements, and fixes the inner pressing plate and the outer ring pressing plate by using the pressing screws.

[0024] The numerical control machine tool runs the final tool path file to machine the machining area. The honeycomb core machined by this method has high repeat positioning accuracy, the machining preparation time is reduced by nearly 50%, the product machining time is greatly reduced, and the product can serve the market faster.

[0025] The product provided by the present application is described in detail above. The principle and implementation mode of the present application are described by applying specific examples in this paper, and the above description of the examples is only used to help understand the core idea of the present application. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the present application without departing from the principle of the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A method for machining a complex curved honeycomb, suitable for machining a product for an aircraft thrust device, said product comprising a region to be machined and a non-machined region, characterized in that, The processing method comprises, S1: optimizing the 3D model of the product using UG-NX software; S2: outputting the product machining tool path using UG-NX software; S3: virtually simulating the tool path, carrying out on-machine debugging, and obtaining cutting parameters and process parameters; S4: fixing the product through a preset tooling fixture and adopting numerical control for cutting processing to obtain the final product.

2. The method of claim 1, wherein, S1 comprises optimizing irregular surfaces in the product using UG-NX software, including reconstructing the 3D model of the product using a stitching method and a patching method, and removing modeling parameters.

3. The method of claim 1 wherein, S2 comprises constructing tool path auxiliary surfaces and curves according to design standards using an expansion command or a bias command for the product 3D model after parameter removal; Variable profile milling method and fixed profile milling method are used to obtain rough machining and finishing tool paths, and cutting parameters and process parameters are preset.

4. The method of claim 1 wherein, S3 comprises constructing a simulation model using virtual simulation software and configuring the machine tool model; Simulate the output tool path, if the simulated tool path exceeds the threshold, feed back the tool path information result to the UG-NX software for re-optimization until the tool path is within the threshold range, output the final tool path file after optimization and run it in the numerical control machine tool.

5. The method of claim 4, wherein, The product is a honeycomb core, the non-machining area of the honeycomb core is provided with a threaded hole, the preset tooling fixture in S4 comprises a base, an outer ring pressing plate and an inner pressing plate with a special-shaped structure, wherein, The base is provided with an arc-shaped protrusion in the central area, which is matched with the inner cavity surface structure of the honeycomb core and can support the honeycomb core; The outer ring pressing plate is continuously arranged along the edge positions of the top surface of the honeycomb core and is fixed by screws to fix the edges of the honeycomb core; The non-machining area in the area surrounded by the outer ring pressing plate is fitted with the inner pressing plate and fastened by screws, and only the machining area is exposed; The numerical control machine tool runs the final tool path file to machine the machining area.

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