Machining method of thin-wall cabin

Abstract

The invention relates to a processing method of a thin-wall cabin. The processing method comprises the following steps: preparing a blank piece with inner cavity characteristics; a weak-rigidity thin-wall area of the blank piece is judged, and an anti-vibration piece is arranged in an inner cavity of the weak-rigidity thin-wall area; rough milling is conducted on the outer molded surface of the blank, and a process reinforcing rib is constructed in the weak-rigidity thin-wall area; finish milling is conducted on the outer molded surface, located outside the process reinforcing rib, in the weak-rigidity thin-wall area; and the process reinforcing ribs and the anti-vibration pieces are removed, and the target cabin is obtained. According to the machining method of the thin-wall cabin, vibration of the cabin in the follow-up machining process is reduced or avoided by arranging the anti-vibration piece, the rigidity is improved by constructing the process reinforcing ribs in the area of the weak-rigidity thin-wall cabin during rough milling, the positions except the process reinforcing ribs are milled firstly, then the process reinforcing ribs are removed, and the machining precision of the thin-wall cabin is improved. The machining quality of the thin-wall cabin is guaranteed, and the problem that in the prior art, when the thin-wall cabin is machined, the machining quality is poor is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a processing method for a thin-wall cabin body. Background Art

[0002] With the development of aerospace technology, aviation structural parts are gradually moving towards large-scale, integrated and thin-walled. In order to reduce the weight of aircraft, thin-walled structures are widely used in the design and manufacturing process of aircraft. Since there are many processing difficulties in the production and processing of thin-walled parts, the problem of difficult processing of thin-walled structural parts is widely present in mechanical manufacturing fields such as aerospace.

[0003] During the milling process of thin-walled cabin bodies, since most parts of the cabin body have weak rigidity, when the existing process method is used with a vertical milling cutter for processing, the overall vibration of the parts is severe, and there are too many chatter marks on the surface after processing, and even bulging may occur, which not only leads to the problem of low processing efficiency, but also may cause the wall thickness of the cabin body to be lower than the set value and the surface quality to be poor. This cannot be avoided even after adjusting the cutting method and parameters. Therefore, the existing technology has the problem of poor processing quality when processing thin-walled cabin bodies. Summary of the invention

[0004] The purpose of the present invention is to at least solve the problem of poor processing quality in the prior art when processing thin-walled cabins. This purpose is achieved through the following technical solutions: The present invention provides a method for processing a thin-walled cabin body, and the method for processing a thin-walled cabin body comprises: Step S1, preparing a blank with inner cavity features; Step S2, determining the weak rigidity thin-walled area of ​​the blank, and setting a shockproof part in the inner cavity of the weak rigidity thin-walled area; Step S3, performing rough milling on the outer surface of the blank to construct process reinforcement ribs in the weak rigidity thin-walled area; Step S4, performing precision milling on the outer surface outside the process reinforcement rib in the weak rigidity thin-walled area; Step S5: removing the process reinforcement ribs and the shockproof parts to obtain a target cabin.

[0005] According to the processing method of the thin-walled cabin body proposed in the embodiment of the present invention, the blank to be processed has an inner cavity feature, that is, it is provided with an inner cavity. When processing the blank, firstly, by judging the weak rigidity thin-walled area, a shock-proof part is set in the inner cavity corresponding to the weak rigidity thin-walled area. The setting of the shock-proof part can reduce or avoid the vibration of the cabin body during subsequent processing. Thereafter, the outer surface of the blank is rough-milled. During the rough-milling, process reinforcement ribs are constructed in the area of ​​the weak rigidity thin-walled cabin body. The process reinforcement ribs can increase the rigidity of the cabin body. In the subsequent fine processing, the parts other than the process reinforcement ribs are first milled, and then the process reinforcement ribs are removed by milling, which further improves the processing quality of the thin-walled cabin body and solves the problem of poor processing quality in processing thin-walled cabin bodies in the prior art.

[0006] In addition, the processing method of the thin-walled cabin body proposed in the embodiment of the present invention may also have the following technical features: In some embodiments of the present invention, the wall thickness of the weak rigidity thin-walled area of ​​the blank is 1.5 mm-1.7 mm.

[0007] In some embodiments of the present invention, in step S2, providing a shock-absorbing component in the inner cavity of the weak rigidity thin-walled region comprises: connecting a shock-absorbing rubber pad to the inner cavity of the weak rigidity thin-walled region, and connecting a metal plate to the shock-absorbing rubber pad.

[0008] In some embodiments of the present invention, a plurality of the shock-absorbing rubber pads are provided, and the plurality of shock-absorbing rubber pads are arranged at set intervals and are respectively connected to the metal plate.

[0009] In some embodiments of the present invention, the shock-absorbing rubber pad is bonded to the inner cavity of the weak-rigidity thin-walled area, and the shock-absorbing rubber pad is bonded to the metal plate.

[0010] In some embodiments of the present invention, in step S3, the process reinforcement ribs are configured as cross reinforcement ribs.

[0011] In some embodiments of the present invention, in step S4, an end mill is used to perform finish milling on the outer surface outside the process reinforcement rib in the weak rigidity thin-walled area.

[0012] In some embodiments of the present invention, the cutting depth of the end mill is set to 1 mm per layer.

[0013] In some embodiments of the present invention, the feed speed of the end mill is set to 1200 mm / min.

[0014] In some embodiments of the present invention, in step S5, the process ribs are removed by milling using a ball-end cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic diagram of the steps of a method for processing a thin-walled cabin body according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a blank in an embodiment of a method for processing a thin-walled cabin; Figure 3 This is a schematic diagram of the structure obtained after processing in step S2 of an embodiment of a method for processing a thin-walled cabin; Figure 4 It is a schematic diagram of the structure obtained after processing in step S3 of the embodiment of the processing method of the thin-walled cabin body.

[0016] The symbols in the accompanying drawings are as follows: 10. Thin-walled area; 20. Shock-absorbing rubber pad; 30. Metal plate; 40. Process reinforcement ribs. DETAILED DESCRIPTION

[0017] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0018] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain", and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof.

[0019] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0020] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0021] like Figure 1 As shown, an embodiment of the present invention provides a method for processing a thin-walled cabin body, and the method for processing a thin-walled cabin body includes: Step S1, preparing a blank with inner cavity features; Step S2, determining the weak rigidity thin-walled area of ​​the blank, and setting a shockproof part in the inner cavity of the weak rigidity thin-walled area; Step S3, performing rough milling on the outer surface of the blank to construct process reinforcement ribs in the weak rigidity thin-walled area; Step S4, performing precision milling on the outer surface outside the process reinforcement rib in the weak rigidity thin-walled area; Step S5: remove the process reinforcement ribs and shockproof parts to obtain the target cabin.

[0022] According to the processing method of the thin-walled cabin body proposed in the embodiment of the present invention, the blank to be processed has an inner cavity feature, that is, it is provided with an inner cavity. When processing the blank, firstly, by judging the weak rigidity thin-walled area, a shock-proof part is set in the inner cavity corresponding to the weak rigidity thin-walled area. The setting of the shock-proof part can reduce or avoid the vibration of the cabin body during subsequent processing. Thereafter, the outer surface of the blank is rough-milled. During the rough-milling, process reinforcement ribs are constructed in the area of ​​the weak rigidity thin-walled cabin body. The process reinforcement ribs can increase the rigidity of the cabin body. In the subsequent fine processing, the parts other than the process reinforcement ribs are first milled, and then the process reinforcement ribs are removed by milling, which further improves the processing quality of the thin-walled cabin body and solves the problem of poor processing quality in processing thin-walled cabin bodies in the prior art.

[0023] It should be understood that a thin-walled cabin generally refers to a cabin with a wall thickness not greater than 6 mm.

[0024] In step S1, the blank is cast, and a lightweight solution is adopted during casting. Figure 2 It can be understood that there is no machining allowance in the inner cavity of the blank, which facilitates subsequent milling processing and also facilitates the arrangement of shock-absorbing parts in the inner cavity in step S2.

[0025] In step S2, the weak rigid thin-walled area 10 of the blank can be judged manually or by automated mechanical judgment, which is not specifically limited in this embodiment. The judgment standard of the weak rigid thin-walled area 10 can be set according to actual conditions, which is not specifically limited in this embodiment. In some embodiments of the present invention, the wall thickness of the weak rigid thin-walled area 10 of the blank is any value between 1.5 mm and 1.7 mm. Taking manual judgment as an example, by measuring the wall thickness of each area of ​​the blank, the area below 1.5 mm is judged as the weak rigid thin-walled area 10.

[0026] On the basis of the above-mentioned implementation mode, a shock-proof part is arranged in the inner cavity of the weakly rigid thin-walled area 10. For example, fillers such as gypsum, rubber, etc. can be added to the inner cavity, or metal parts can be connected to the inner cavity to enhance the rigidity of the blank wall to be processed and reduce the vibration in the subsequent processing process. After the cabin body is processed and formed, the fillers such as gypsum and rubber or metal parts are removed.

[0027] Furthermore, in some embodiments of the present invention, the shock-absorbing component is arranged in the inner cavity of the weak rigidity thin-walled area 10 in step S2, including: connecting a shock-absorbing rubber pad 20 in the inner cavity of the weak rigidity thin-walled area 10, and connecting a metal plate 30 on the shock-absorbing rubber pad 20. That is to say, the shock-absorbing component in this embodiment includes a shock-absorbing rubber pad 20 and a metal plate 30. The shock-absorbing rubber pad 20 and the metal plate 30 connected to the shock-absorbing rubber pad 20 can increase the rigidity of the blank wall. In the subsequent milling process, the shock-absorbing rubber pad 20 can also play a buffering role, reducing the vibration of the blank caused by the milling cutter cutting, thereby reducing or avoiding the generation of chatter marks on the surface of the cabin, and improving the processing quality of the cabin surface.

[0028] On the basis of the above-mentioned embodiment, the shock-absorbing rubber pad 20 is provided with one or more, and the metal plate 30 can also be provided with one or more. Figure 3 In an optional embodiment, a plurality of shock-absorbing rubber pads 20 are provided, and a metal plate 30 is provided. The plurality of shock-absorbing rubber pads 20 can be arranged at set intervals, and the metal plate 30 is connected to the plurality of rubber shock-absorbing pads, for example Figure 3 As shown, four shock-absorbing rubber pads 20 are provided, and the connection line of the four shock-absorbing rubber pads 20 is a parallelogram or a trapezoid, and the metal plate 30 is connected to the top of the four shock-absorbing rubber pads 20 and can cover the four shock-absorbing rubber pads 20; or, three shock-absorbing rubber pads 20 are provided, and the connection line of the three shock-absorbing rubber pads 20 is a triangle, and the metal plate 30 is connected to the top of the three shock-absorbing rubber pads 20 and can cover the three shock-absorbing rubber pads 20. The provision of multiple shock-absorbing rubber pads 20 in this embodiment ensures the buffering and shock-absorbing effect, and the metal plate 30 is connected to the multiple shock-absorbing rubber pads 20 to ensure the stability of the connection, and improves the rigidity of the thin wall of the blank, thereby reducing or avoiding the generation of chatter marks on the surface of the cabin, and improving the processing quality of the cabin surface.

[0029] In another optional embodiment, a plurality of shock-absorbing rubber pads 20 are provided, and a plurality of metal plates 30 are also provided. The plurality of shock-absorbing rubber pads 20 can be arranged at set intervals, and each metal plate 30 is connected to a corresponding rubber shock-absorbing pad. It can be understood that the provision of a plurality of shock-absorbing rubber pads 20 in this embodiment ensures the buffering and shock-absorbing effect, and each shock-absorbing rubber pad 20 is connected to a metal plate 30. The rigidity of the thin wall of the blank is improved by the multi-point setting, thereby reducing or avoiding the generation of chatter marks on the surface of the cabin, and improving the processing quality of the cabin surface. Based on the above embodiment, the thickness of the shock-absorbing rubber pad 20 can be set to any value between 5mm and 8mm, for example, it can be set to 6mm, and the thickness of the metal plate 30 can be set to 10mm.

[0030] On the basis of the above-mentioned implementation mode, the shock-absorbing rubber pad 20 is bonded to the inner cavity of the weak rigid thin-walled area 10, and the shock-absorbing rubber pad 20 is bonded to the metal plate 30, for example, by using strong glue. It can be understood that due to the thin wall thickness of the blank, the bonding method is easy to operate and not easy to damage the blank, and the glue is easy to remove in the later stage, which can avoid damaging the blank and ensure the quality of subsequent processing of the cabin.

[0031] In step S3, the outer surface of the blank is subjected to rough milling. During the rough milling process, the process can be processed from the weak rigidity part to the strong rigidity part, and process reinforcement ribs are constructed in the weak rigidity thin-walled area 10. It can be understood that after the completion of step S2, the inner cavity of the blank has been provided with a shock-absorbing rubber pad 20 and a metal plate 30. Milling on this basis can reduce vibration. There may still be a problem of insufficient rigidity of the weak rigidity thin-walled area 10 of the blank. Therefore, in this step, process reinforcement ribs 40 are processed on the outer wall of the weak rigidity thin-walled area 10 of the blank. The processing method of reserving process reinforcement ribs 40 can further improve the rigidity of the weak rigidity thin-walled area 10, which is convenient for subsequent milling. In this step, one or more combinations of end mills, face mills and T-type cutters can be selected for milling, and this embodiment does not specifically limit this.

[0032] Based on the above embodiment, the shape of the process reinforcement rib 40 can be set according to the shape of the weak rigid thin-walled area 10 and other actual parameters. For example, see Figure 4 The process reinforcement ribs 40 are set as cross reinforcement ribs. By constructing cross reinforcement ribs in the weak rigidity thin-walled area 10, the rigidity is improved, the generation of chatter marks on the surface of the cabin is reduced or avoided, and it is also convenient to improve the subsequent milling efficiency.

[0033] In step S4, the weak rigid thin-walled area 10 is further subjected to fine milling. Since the process reinforcement ribs 40 such as cross reinforcement ribs are provided in step S3, the rigidity of the weak rigid thin-walled area 10 is increased. This step can be processed with an end mill with a larger cutting force, thereby improving the processing efficiency. It can be understood that this step first performs fine milling on the outer surface outside the cross reinforcement rib. During the processing, the processing can be performed from the weak rigidity part to the strong rigidity part. In this embodiment, the fine milling of the area outside the cross reinforcement rib is completed while the rigidity of the weak rigid thin-walled area 10 is maintained at a high level, thereby reducing or avoiding the generation of chatter marks on the surface of the cabin body and improving the processing quality.

[0034] On the basis of the above-mentioned implementation, due to the setting of the shock-absorbing rubber pad 20, the metal plate 30 and the cross reinforcement ribs, the rigidity of the cabin to be processed is greatly enhanced. When performing fine milling on it, the cutting depth of the end mill can be set to 1mm per layer, and the feed speed can be set to 1200mm / min. Compared with the cutting depth of the end mill of 0.3mm per layer and the feed speed of 300mm / min in the prior art, the processing efficiency of the processing method proposed in this embodiment is greatly improved, and the surface of the cabin is smoother, and the processing quality is greatly improved.

[0035] In step S5, the process reinforcement ribs 40 and the shockproof parts are removed to obtain the target cabin. For the process reinforcement ribs 40, this embodiment can use a ball-end cutter for milling removal. The ball-end cutter has a small cutting force and can finely remove the process reinforcement ribs 40, thereby ensuring the flatness of the cabin surface. When using a ball-end cutter for processing, processing can be performed from the weak rigidity portion of the cross reinforcement rib to the strong rigidity portion to ensure processing accuracy. This embodiment improves processing efficiency while ensuring the processing quality of the cabin surface by adopting different processing methods for different areas. For the shock-absorbing rubber pad 20 and the metal plate 30, taking the adhesive connection as an example, after removing the process reinforcement ribs 40, the shock-absorbing rubber pad 20 and the metal plate 30 can be removed.

[0036] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for processing a thin-walled cabin, characterized in that: include: Step S1, preparing a blank with inner cavity features; Step S2, determining the weak rigidity thin-walled area of ​​the blank, and setting a shockproof part in the inner cavity of the weak rigidity thin-walled area; Step S3, performing rough milling on the outer surface of the blank to construct process reinforcement ribs in the weak rigidity thin-walled area; Step S4, performing precision milling on the outer surface outside the process reinforcement rib in the weak rigidity thin-walled area; Step S5: removing the process reinforcement ribs and the shockproof parts to obtain a target cabin.

2. The method for processing a thin-walled cabin according to claim 1, characterized in that: The wall thickness of the weak rigidity thin-walled area of ​​the blank is 1.5mm-1.7mm.

3. The method for processing a thin-walled cabin according to claim 1, characterized in that: In step S2, arranging a shock-absorbing component in the inner cavity of the weak rigidity thin-walled area includes: connecting a shock-absorbing rubber pad to the inner cavity of the weak rigidity thin-walled area, and connecting a metal plate to the shock-absorbing rubber pad.

4. The method for processing a thin-walled cabin according to claim 3, characterized in that: The shock-absorbing rubber pads are provided in plurality, and the plurality of shock-absorbing rubber pads are arranged at set intervals and are respectively connected to the metal plates.

5. The method for processing a thin-walled cabin according to claim 3, characterized in that: The shock-absorbing rubber pad is bonded to the inner cavity of the weak-rigidity thin-walled area, and the shock-absorbing rubber pad is bonded to the metal plate.

6. The method for processing a thin-walled cabin according to claim 1, characterized in that: In step S3, the process reinforcement ribs are set as cross reinforcement ribs.

7. The method for processing a thin-walled cabin body according to claim 1, characterized in that: In step S4, an end mill is used to perform finish milling on the outer surface outside the process reinforcement rib in the weak rigidity thin-walled area.

8. The method for processing a thin-walled cabin according to claim 7, characterized in that: The cutting depth of the end mill is set to 1 mm per layer.

9. The method for processing a thin-walled cabin according to claim 7, characterized in that: The feed rate of the end mill is set to 1200 mm / min.

10. The method for processing a thin-walled cabin body according to claim 1, characterized in that: In step S5, the process reinforcement ribs are removed by milling with a ball-end cutter.

Images