Method for machining large thin-walled arcuate plates

Abstract

The application provides a large thin-wall arc-shaped plate surface processing method, which can reduce the deformation of a large thin-wall arc-shaped plate during processing, and further improves the processing precision of the arc-shaped plate, and relates to the technical field of arc-shaped plate processing. The large thin-wall arc-shaped plate surface processing method comprises the following steps: providing a processing clamp, wherein the clamp comprises an upper clamp and a lower clamp, the upper clamp is provided with a first arc-shaped groove, and the lower clamp is provided with a second arc-shaped groove; after the first arc-shaped groove of the upper clamp is buckled with the upper half of the arc-shaped plate, the upper half of the arc-shaped plate is first clamped and fixed through radial jacking screws on both sides of the first arc-shaped groove, and then the upper clamp is connected and fixed with the lower clamp; the lifting rope is connected to the upper clamp or / and the lower clamp, and the arc-shaped plate is hoisted on the processing table through the upper clamp or / and the lower clamp; the upper half of the arc-shaped plate is processed, and during the processing, a symmetrical processing mode is adopted on both sides. The application can effectively improve the processing precision of the arc-shaped plate.

Description

Technical Field

[0001] This invention relates to the field of curved plate processing technology, specifically a method for processing the surface of large thin-walled curved plates. Background Technology

[0002] Thin-walled parts play a vital role in numerous engineering fields due to their unique structural characteristics and have extremely wide applications. Currently, the industry has established mature and complete machining methods and tooling design systems for the precision surface machining and clamping of thin-walled straight plates, enabling efficient and precise machining of such parts.

[0003] However, large, thin-walled curved plates with a length greater than 1 meter, an aspect ratio greater than 5, and a width-to-thickness ratio greater than 10 cannot be laid flat on the processing surface like straight plates due to their special shape and must be processed upright. Upright processing presents the following challenges: easy deformation during processing and difficulty in ensuring processing accuracy. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a surface processing method for large thin-walled arc plates. This method can reduce the deformation of large thin-walled arc plates during surface processing, thereby improving the processing accuracy of the arc plates.

[0005] The technical solution adopted by this invention to solve its technical problem is: a method for processing the surface of large thin-walled arc-shaped plates, comprising the following steps:

[0006] In the width direction of the arc-shaped plate, the arc-shaped plate is divided into an upper half and a lower half, and a processing fixture is provided. The fixture includes an upper fixture and a lower fixture. The upper fixture is provided with a first arc-shaped groove adapted to the upper half of the arc-shaped plate, and the lower fixture is provided with a second arc-shaped groove adapted to the lower half of the arc-shaped plate. On both sides of the first arc-shaped groove and the second arc-shaped groove, there are multiple radial clamping screws arranged at intervals along their extension direction. The radial clamping screws on both sides of the first arc-shaped groove are arranged in a one-to-one correspondence, and the radial clamping screws on both sides of the second arc-shaped groove are arranged in a one-to-one correspondence.

[0007] The lower half of the arc-shaped plate is placed in the second arc-shaped groove of the lower clamp, and the lower half of the arc-shaped plate is clamped and fixed by the radial tightening screws on both sides of the second arc-shaped groove.

[0008] After the first arc-shaped groove of the upper clamp is engaged with the upper half of the arc plate, the upper half of the arc plate is clamped and fixed by the radial tightening screws on both sides of the first arc-shaped groove. Then the upper clamp and the lower clamp are connected and fixed to form an integrated clamping structure.

[0009] Connect the lifting rope to the preset lifting point of the upper clamp and / or lower clamp, and use the upper clamp and / or lower clamp to lift the arc plate onto the processing worktable and position it.

[0010] After securing the lower clamp, remove the upper clamp.

[0011] The upper part of the curved plate is processed, and a symmetrical processing method is used on both sides during the processing.

[0012] After the upper half of the arc plate is processed, the first arc groove of the upper clamp is re-fastened to the upper half of the arc plate, and then the upper half of the arc plate is clamped and fixed by the radial tightening screws on both sides of the first arc groove. Then the upper clamp and the lower clamp are reconnected and fixed to form an integrated clamping structure.

[0013] Connect the lifting rope to the preset lifting point of the upper clamp or / and lower clamp, and drive the arc plate to rotate 180° and place it on the processing worktable for positioning.

[0014] After securing the upper clamp, remove the lower clamp.

[0015] The lower half of the curved plate is processed using a symmetrical processing method on both sides.

[0016] Furthermore, both the upper and lower clamps are provided with bolt holes for interconnection, and the upper and lower clamps are fixed together by bolts passing through the bolt holes.

[0017] Furthermore, both the upper clamp and the lower clamp include a base. The first arc-shaped groove is formed by at least two first arc-shaped groove units spaced apart on the base of the upper clamp. The radial tightening screws are provided on both sides of the first arc-shaped groove unit. The first arc-shaped groove unit includes an upper groove bottom plate and two upper groove plates that are opposite to each other and spaced apart on the base of the upper clamp. The upper groove bottom plate is disposed between the two upper groove plates and surrounds the two upper groove plates to form the first arc-shaped groove unit.

[0018] The second arc-shaped groove is formed by at least two second arc-shaped groove units spaced apart on the base of the lower clamp. The second arc-shaped groove units are arranged in a one-to-one correspondence with the first arc-shaped groove units. The radial tightening screws are also provided on both sides of the second arc-shaped groove unit. The second arc-shaped groove unit is formed by a lower groove bottom plate and two opposing and spaced lower groove plates installed on the base of the lower clamp. The lower groove bottom plate is disposed between the two lower groove plates and surrounds the two lower groove plates to form the second arc-shaped groove unit.

[0019] Furthermore, the base has a fan-shaped structure, including an outer arc-shaped support, an inner arc-shaped support spaced apart on the inner side of the outer arc-shaped support, and multiple radial supports arranged between the outer arc-shaped support and the inner arc-shaped support, with one end connected to the outer arc-shaped support and the other end connected to the inner arc-shaped support. The radial supports are arranged at intervals along the extension direction of the outer arc-shaped support.

[0020] Furthermore, a reinforcing support is provided between the two ends of the inner arc-shaped support, with one end connected to one end of the inner arc-shaped support and the other end connected to the other end of the inner arc-shaped support.

[0021] Furthermore, the end of the radial tightening screw is fitted with an end cap that rotatably engages with it.

[0022] The beneficial effects of this invention are as follows: The method for processing the surface of large thin-walled arc-shaped plates of this invention includes an upper clamp and a lower clamp. During the processing of the arc-shaped plate surface, the clamp corresponding to the unprocessed half of the arc-shaped plate can be used to hold and fix the arc-shaped plate, increasing the rigidity of the arc-shaped plate surface during processing. Furthermore, when processing the upper and lower halves of the arc-shaped plate surface, a symmetrical processing method is adopted on both sides, allowing the processing forces on both sides to cancel each other out or largely cancel each other out, thus making the arc-shaped plate surface less prone to deformation during processing. During the hoisting, moving, and flipping of the arc-shaped plate, the upper and lower halves are respectively fixed and clamped by the integrated upper and lower clamps, further increasing the rigidity of the arc-shaped plate during hoisting, moving, and flipping. Moreover, during the moving and flipping process, the arc-shaped plate is moved and flipped through the upper clamp and / or the lower clamp. The arc-shaped plate is not directly hoisted or moved during the switching between the processing of the upper and lower halves of the arc-shaped plate, making the arc-shaped plate less prone to deformation during moving and flipping. Therefore, the method of the present invention can effectively control the deformation of the arc plate throughout the entire processing process, reduce the amount of deformation during the processing of the arc plate, and effectively improve the processing accuracy of the arc plate. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the upper clamp of the present invention;

[0024] Figure 2 This is a schematic diagram of the lower clamp of the present invention;

[0025] Figure 3 This is a schematic diagram of the upper and lower clamps holding the curved plate for hoisting;

[0026] Figure 4 This is a schematic diagram of the upper half of the curved plate being processed;

[0027] Figure 5 This is a schematic diagram of the structure of the first arc-shaped groove unit;

[0028] Figure 6 This is a schematic diagram of the structure of the second arc-shaped groove unit;

[0029] Figure 7 This is a structural diagram of the base;

[0030] The figure shows: lower clamp 1, upper clamp 2, radial clamping screw 4, base 5, bolt hole 6, machining table 7, machining tool 8, second arc groove 11, first arc groove 21, end 41, outer arc support 51, inner arc support 52, radial support 53, reinforcing support 54, second arc groove unit 111, lower groove plate 112, lower groove bottom plate 113, first arc groove unit 211, upper groove plate 212, upper groove bottom plate 213. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] The direction of the arc extension of the curved plate is opposite to the length of the curved plate. For example... Figures 1 to 4 As shown, the method for processing a thin-walled arc-shaped plate according to the present invention includes the following steps:

[0033] Step 1: Divide the arc-shaped plate into an upper half and a lower half along its width direction, and provide a processing fixture. The fixture includes an upper fixture 2 and a lower fixture 1. The upper fixture 2 is provided with a first arc-shaped groove 21 that is adapted to the upper half of the arc-shaped plate, and the lower fixture 1 is provided with a second arc-shaped groove 11 that is adapted to the lower half of the arc-shaped plate. Both sides of the first arc-shaped groove 21 and the second arc-shaped groove 11 are provided with a plurality of radial clamping screws 4 arranged at intervals along their extension direction, and the radial clamping screws 4 on both sides of the first arc-shaped groove 21 are arranged in a one-to-one correspondence, and the radial clamping screws 4 on both sides of the second arc-shaped groove 11 are arranged in a one-to-one correspondence.

[0034] Step 2: Place the lower half of the arc plate into the second arc groove 11 of the lower clamp 1, and fix the lower half of the arc plate by the radial tightening screws 4 on both sides of the second arc groove 11.

[0035] Step 3: Connect the first arc groove 21 of the upper clamp 2 to the upper half of the arc plate. First, clamp and fix the upper half of the arc plate by the radial tightening screws 4 on both sides of the first arc groove 21. Then, connect and fix the upper clamp 2 to the lower clamp 1 to form an integrated clamping structure (so that the upper and lower clamps form a whole).

[0036] Step 4: Connect the lifting rope to the preset lifting point of the upper clamp 2 or / and the lower clamp 1, and lift the arc plate onto the processing worktable and position it through the upper clamp 2 or / and the lower clamp 1;

[0037] Step 5: After fixing the lower clamp 1, remove the upper clamp 2 to expose the upper half of the surface to be processed on the curved plate;

[0038] Step Six, as Figure 4As shown, the upper half of the curved plate is processed until it meets the requirements. During the processing, a symmetrical processing method is adopted (the two sides of the curved plate are processed symmetrically at the same time using the processing tool 8).

[0039] Step 7: After the upper half of the arc plate is processed, the first arc groove 21 of the upper clamp 2 is re-fastened to the upper half of the arc plate, and the upper half of the arc plate is clamped and fixed by the radial tightening screws 4 on both sides of the first arc groove 21. Then, the upper clamp 2 and the lower clamp 1 are reconnected and fixed to form an integrated clamping structure.

[0040] Step 8: Connect the lifting rope to the preset lifting point of the upper clamp 2 or / and the lower clamp 1, and rotate the arc plate 180° through the upper clamp 2 or / and the lower clamp 1 and place it on the processing table 7 and position it.

[0041] Step 9: After fixing the upper clamp 2, remove the lower clamp 1 to expose the lower half of the curved plate surface to be processed;

[0042] Step 10: Process the lower half of the curved plate until its dimensions meet the requirements. During the processing, a symmetrical processing method is also adopted on both sides.

[0043] The specific spacing of the radial tightening screws 4 on both sides of the first arc groove 21 and the second arc groove 11 is set according to the actual situation to ensure that the deformation of the arc plate is within the required range during the processing. Generally speaking, the smaller the spacing of the radial tightening screws 4 and the more screws are set, the smaller the deformation of the arc plate during the processing.

[0044] The arc plate processing method of the present invention includes an upper clamp 2 and a lower clamp 1. When processing the surface of the arc plate, the upper clamp 2 or the lower clamp 1 is used to clamp and fix the other half of the unprocessed part of the arc plate (when processing the upper half, the lower clamp is used to clamp and fix the lower half of the arc plate; when processing the lower half, the upper clamp is used to clamp and fix the upper half of the arc plate). This increases the rigidity of the arc plate surface during processing. Furthermore, when processing the upper and lower halves of the arc plate surface, a symmetrical processing method is adopted on both sides, so the processing forces on both sides can cancel each other out or largely cancel each other out. Thus, the surface of the arc plate is not easily deformed during processing. Furthermore, during the hoisting, moving, and flipping of the curved plate, the upper and lower halves are fixedly held and secured by an integrated upper clamp 2 and lower clamp 1, further increasing the rigidity of the curved plate during hoisting, moving, and flipping. Since the movement and flipping are all achieved through the upper clamp 2 and / or the lower clamp 1, the curved plate is not directly hoisted or moved during the processing of the upper and lower halves, making it less prone to deformation during movement and flipping. Therefore, the method of this invention can better control the deformation of the curved plate throughout the entire processing process, resulting in less deformation and improved processing accuracy.

[0045] It should be noted that when the width of the arc plate is large, in order to better limit the deformation of the arc plate, multiple sets of radial tightening screws 4 can be set in the depth direction of the first arc groove 21 and the second arc groove 11.

[0046] To facilitate the connection and disassembly of the upper clamp 2 and the lower clamp 1, such as Figure 5 and Figure 6 As shown, in this invention, both the upper clamp 2 and the lower clamp 1 are provided with bolt holes 6 for interconnection. The upper clamp 2 and the lower clamp 1 are connected and fixed together by bolts passing through the bolt holes 6 to form a whole. The specific number and position of the bolt holes 6 are set as needed to ensure that the upper clamp 2 and the lower clamp 1 can be stably connected.

[0047] Both the first arc-shaped groove 21 and the second arc-shaped groove 11 can be formed from a single integral arc-shaped groove. For large, thin-walled arc-shaped plates, which are long, if both the first arc-shaped groove 21 and the second arc-shaped groove 11 are formed from a single integral arc-shaped groove, their length will also be long, making processing and manufacturing difficult, and also resulting in a relatively heavy weight for the upper clamp 2 and the lower clamp 1. To reduce the weight of the upper clamp 2 and the lower clamp 1, and to facilitate the processing and manufacturing of the first arc-shaped groove 21 and the second arc-shaped groove 11, such as... Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, both the upper clamp 2 and the lower clamp 1 include a base 5. The first arc-shaped groove 21 is formed by at least two first arc-shaped groove units 211 spaced apart on the base 5 of the upper clamp 2. The radial tightening screws 4 are provided on both sides of the first arc-shaped groove unit 211. The first arc-shaped groove unit 211 includes an upper groove bottom plate 213 and two opposing and spaced upper groove plates 212 mounted on the base 5 of the upper clamp 2. The upper groove bottom plate 213 is disposed between the two upper groove plates 212 and surrounds the two upper groove plates 212 to form the first arc-shaped groove unit 211. The second arc-shaped groove 11 is formed by at least two second arc-shaped groove units 111 spaced apart on the base 5 of the lower clamp 1. Each second arc-shaped groove unit 111 corresponds to one of the first arc-shaped groove units 211. Radial tightening screws 4 are also provided on both sides of each second arc-shaped groove unit 111. Each second arc-shaped groove unit 111 includes a lower groove base plate 113 and two opposing, spaced-apart lower groove plates 112 mounted on the base 5 of the lower clamp 1. The lower groove base plate 113 is positioned between the two lower groove plates 112, forming the second arc-shaped groove unit 111. This structure allows for the individual fabrication of each arc-shaped groove unit before assembly to form the corresponding arc-shaped groove, making fabrication more convenient. Furthermore, the spaced arrangement between the arc-shaped groove units reduces the weight of the clamp, facilitating hoisting.

[0048] It should be noted that the spacing between the arc-shaped groove units of each fixture should not be too large, otherwise it will weaken their reinforcing effect on the arc-shaped plate. The specific spacing between the arc-shaped groove units can be determined experimentally to find a suitable value.

[0049] The base can be welded from plates or profiles and can be of various shapes. In this invention, such as... Figure 7 As shown, the base 5 has a fan-shaped structure, including an outer arc-shaped support 51, inner arc-shaped supports 52 spaced apart on the inner side of the outer arc-shaped support 51, and multiple radial supports 53 arranged between the outer arc-shaped support 51 and the inner arc-shaped support 52, with one end connected to the outer arc-shaped support 51 and the other end connected to the inner arc-shaped support 52. The radial supports 53 are spaced apart along the extension direction of the outer arc-shaped support 51. With this structure, the base is lighter, stronger, and less prone to deformation during hoisting. Supporting components can also be installed between adjacent radial supports 53 as needed. The outer arc-shaped support 51 can be welded from plates or profiles.

[0050] To further increase the strength of the base, a reinforcing support 54 is provided between the two ends of the inner arc-shaped support 52, with one end connected to one end of the inner arc-shaped support 52 and the other end connected to the other end of the inner arc-shaped support 52.

[0051] like Figure 5As shown, in order to facilitate the screwing of the radial clamping screw 4 when clamping the arc plate, the end of the radial clamping screw 4 is fitted with an end head 41 that rotates with it.

Claims

1. A method for processing the surface of large thin-walled arc-shaped plates, characterized in that, Includes the following steps: In the width direction of the arc plate, the arc plate is divided into an upper half and a lower half, and a processing fixture is provided. The fixture includes an upper fixture (2) and a lower fixture (1). The upper fixture (2) is provided with a first arc groove (21) adapted to the upper half of the arc plate, and the lower fixture (1) is provided with a second arc groove (11) adapted to the lower half of the arc plate. Both sides of the first arc groove (21) and the second arc groove (11) are provided with a plurality of radial clamping screws (4) arranged at intervals along their extension direction. The radial clamping screws (4) on both sides of the first arc groove (21) are arranged in a one-to-one correspondence, and the radial clamping screws (4) on both sides of the second arc groove (11) are arranged in a one-to-one correspondence. The lower half of the arc plate is placed in the second arc groove (11) of the lower clamp (1), and the lower half of the arc plate is clamped and fixed by the radial tightening screws (4) on both sides of the second arc groove (11). After the first arc groove (21) of the upper clamp (2) is fastened to the upper half of the arc plate, the upper half of the arc plate is clamped and fixed by the radial tightening screws (4) on both sides of the first arc groove (21). Then the upper clamp (2) is connected and fixed to the lower clamp (1) to form an integrated clamping structure. Connect the lifting rope to the preset lifting point of the upper clamp (2) or / and the lower clamp (1), and lift the arc plate onto the processing workbench and position it through the upper clamp (2) or / and the lower clamp (1); After fixing the lower clamp (1), remove the upper clamp (2); The upper part of the curved plate is processed, and a symmetrical processing method is used on both sides during the processing. After the upper half of the arc plate is processed, the first arc groove (21) of the upper clamp (2) is fastened to the upper half of the arc plate again, and the upper half of the arc plate is clamped and fixed by the radial tightening screws (4) on both sides of the first arc groove (21). Then the upper clamp (2) and the lower clamp (1) are connected and fixed again to form an integrated clamping structure. Connect the lifting rope to the preset lifting point of the upper clamp (2) or / and the lower clamp (1), and drive the arc plate to rotate 180° and place it on the processing worktable and position it. After fixing the upper clamp (2), remove the lower clamp (1); The lower half of the curved plate is processed using a symmetrical processing method on both sides.

2. The surface processing method for large thin-walled arc-shaped plates as described in claim 1, characterized in that, Both the upper clamp (2) and the lower clamp (1) are provided with bolt holes (6) for mutual connection, and the upper clamp (2) and the lower clamp (1) are fixed by bolts passing through the bolt holes (6).

3. The surface processing method for large thin-walled arc-shaped plates as described in claim 1, characterized in that, Both the upper clamp (2) and the lower clamp (1) include a base (5). The first arc-shaped groove (21) is formed by combining at least two first arc-shaped groove units (211) spaced apart on the base (5) of the upper clamp (2). The radial tightening screws (4) are provided on both sides of the first arc-shaped groove unit (211). The first arc-shaped groove unit (211) includes an upper groove bottom plate (213) and two upper groove plates (212) that are opposite to each other and spaced apart on the base (5) of the upper clamp (2). The upper groove bottom plate (213) is disposed between the two upper groove plates (212) and surrounds the two upper groove plates (212) to form the first arc-shaped groove unit (211). The second arc-shaped groove (11) is formed by at least two second arc-shaped groove units (111) spaced apart on the base (5) of the lower clamp (1). The second arc-shaped groove unit (111) is arranged in a one-to-one correspondence with the first arc-shaped groove unit (211). The radial tightening screws (4) are also provided on both sides of the second arc-shaped groove unit (111). The second arc-shaped groove unit (111) includes a lower groove bottom plate (113) and two lower groove plates (112) that are opposite to each other and spaced apart on the base (5) of the lower clamp (1). The lower groove bottom plate (113) is arranged between the two lower groove plates (112) and surrounds the two lower groove plates (112) to form the second arc-shaped groove unit (111).

4. The surface processing method for large thin-walled arc-shaped plates as described in claim 3, characterized in that, The base (5) is a fan-shaped structure, including an outer arc support (51), an inner arc support (52) spaced apart on the inner side of the outer arc support (51), and multiple radial supports (53) spaced apart between the outer arc support (51) and the inner arc support (52), with one end connected to the outer arc support (51) and the other end connected to the inner arc support (52). The radial supports (53) are arranged at intervals along the extension direction of the outer arc support (51).

5. The surface processing method for large thin-walled arc-shaped plates as described in claim 4, characterized in that, A reinforcing support (54) is provided between the two ends of the inner arc-shaped support (52), with one end connected to one end of the inner arc-shaped support (52) and the other end connected to the other end of the inner arc-shaped support (52).

6. The surface processing method for large thin-walled arc-shaped plates as described in claim 1, characterized in that, The radial tightening screw (4) is fitted with an end cap (41) that rotates with it.

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