Support fixture for curved sheet metal processing

Abstract

The present invention discloses a support fixture for processing curved plate materials, comprising a first mounting plate, a second mounting plate and a plurality of support heads arranged in parallel, the first mounting plate and the second mounting plate being connected by a plurality of support columns, a plurality of through holes being provided on the first mounting plate, the upper ends of the support heads respectively extending from the through holes and being installed and connected with the first mounting plate, the support head comprising a top cover, a cylindrical shell, a bottom cover, a movable push rod, a clamping sleeve, a movable block and a movable sleeve, the outer surface of the clamping sleeve being a conical surface, the conical surface radius of the conical surface decreasing from top to bottom, the inner surface of the movable sleeve being a conical surface, the bottom cover being provided with a through hole for the mounting block to pass through, the mounting blocks of the movable sleeve respectively passing through the through holes of the bottom cover and being tightly connected with the movable block, and a locking nut being provided on the push rod. The present invention strengthens the contraction force of the clamping sleeve and the stability of the structure, so that the clamping sleeve can clamp the movable push rod stably, and ensures the stable support of the push rod to the workpiece.

Description

Technical Field

[0001] The invention relates to a supporting jig for processing curved plate materials, belonging to the technical field of processing precision parts of electronic products. Background Art

[0002] “If you want to do your work well, you must first sharpen your tools.” In order to meet the requirements of parts-related processing technology, such as the roundness, roughness, and parallelism of the inner hole of the product, the use of modern processing machine tools must be combined with the use of reasonable tooling and fixtures to effectively ensure the processing quality of the workpiece, improve labor productivity, expand the scope of use of machine tools, and reduce labor intensity.

[0003] During the machining process of parts, such as the machining of the back cover of a laptop computer, the parts need to be supported and positioned by a fixture. However, due to machining errors or the different heights of the supporting surfaces of the parts during the machining process, a certain supporting point of the existing fixture may not be able to be reliably supported during the clamping process, making it impossible to reliably clamp the parts. Summary of the invention

[0004] The purpose of the present invention is to provide a supporting jig for processing curved plate materials, which strengthens the contraction force of the clamping sleeve and the stability of the structure, so that the clamping sleeve can clamp the movable push rod stably, ensuring the stable support of the push rod to the workpiece.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a support fixture for processing curved plate materials, comprising a first mounting plate, a second mounting plate and a plurality of support heads arranged in parallel, the first mounting plate and the second mounting plate being connected by a plurality of support columns, the first mounting plate being provided with a plurality of first through holes, the upper ends of the support heads respectively extending from the first through holes and being mounted and connected to the first mounting plate, a workpiece being placed above the first mounting plate and being in contact and connected to the support heads;

[0006] The support head comprises a top cover, a cylindrical shell, a bottom cover, a movable push rod, a clamping sleeve, a movable block and a movable sleeve. The upper and lower ends of the shell are respectively connected to the top cover and the bottom cover, so as to form a cavity between the top cover, the shell and the bottom cover. A second through hole is opened in the center of the top cover. The lower part of the movable push rod penetrates into the cavity from the second through hole. The clamping sleeve is sleeved on the outer side of the movable push rod. The movable sleeve is sleeved on the outer side of the clamping sleeve. The movable sleeve can move up and down in the cavity. The lower part of the movable sleeve passes through the bottom cover and is fixedly connected to the movable block. The movable block is connected with a push rod.

[0007] The movable ejector comprises an outer sleeve, a spring, an ejector head and a connecting rod, wherein the ejector head is mounted on the upper end of the outer sleeve, the connecting rod is embedded from the lower end of the outer sleeve and is movably connected to the outer sleeve, the spring is arranged between the ejector head and the connecting rod, the lower end of the connecting rod is embedded in a fixed block, the lower end of the fixed block is embedded in the central through hole of the bottom cover and is fixedly connected to the bottom cover, the outer surface of the clamping sleeve is a conical surface, the conical surface radius of the conical surface decreases from top to bottom, the inner surface of the movable sleeve is a conical surface, the conical surface radius of the conical surface decreases from top to bottom, and the outer surface of the clamping sleeve is clearance-matched with the inner surface of the movable sleeve;

[0008] The clamping sleeve further comprises a first sleeve with a conical outer surface and a second sleeve with a cylindrical outer surface, the bottom surface of the first sleeve is connected to the top surface of the second sleeve, the first sleeve is provided with a plurality of first grooves along the axial direction, the first grooves extend to the second sleeve, the second sleeve is provided with a plurality of second grooves along the axial direction, the second sleeve extends to the first sleeve;

[0009] A plurality of mounting blocks are arranged on the lower surface of the movable sleeve, and a through hole is formed on the bottom cover for the mounting blocks to pass through. The mounting blocks of the movable sleeve pass through the through holes of the bottom cover respectively and are fastened to the movable blocks. A through hole is formed in the center of the movable block, and an inner surface of the lower end of the through hole has an inward flange portion. The lower end of the push rod passes through the through hole of the movable block, and the lower surface of the end of the push rod is in contact with the upper surface of the flange portion. The push rod is also provided with a locking nut.

[0010] The further improved scheme in the above technical scheme is as follows:

[0011] 1. In the above solution, the number of the first through holes is the same as that of the support heads, which is 3 to 9.

[0012] 2. In the above solution, the inner wall of the first through hole has an inward flange, and the flange has a plurality of locking holes along the circumference, and the support head is installed and connected to the locking holes through screws.

[0013] 3. In the above solution, the bottom cover is connected to the bottom surface of the shell by a plurality of screws.

[0014] 4. In the above solution, the upper part of the fixing block is located inside the clamping sleeve.

[0015] 5. In the above solution, the outer wall of the fixing block has an outer flange.

[0016] 6. In the above solution, the clamping sleeve is fixedly clamped between the outer flange of the fixing block and the top cover.

[0017] 7. In the above solution, the top surface of the head is an arc-shaped surface or a spherical surface.

[0018] 8. In the above solution, the first wire grooves and the second wire grooves are arranged at equal intervals along the circumferential direction.

[0019] 9. In the above solution, the first wire trough and the second wire trough are arranged alternately.

[0020] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0021] 1. The present invention is a supporting jig for processing curved plate materials, wherein the movable push rod comprises an outer sleeve, a spring, a push head and a connecting rod, wherein the push head is installed at the upper end of the outer sleeve, the connecting rod is embedded from the lower end of the outer sleeve and is movably connected to the outer sleeve, the spring is arranged between the push head and the connecting rod, the lower end of the connecting rod is embedded in a fixed block, the lower end of the fixed block is embedded in the central through hole of the bottom cover and is fixedly connected to the bottom cover, the outer surface of the clamping sleeve is a conical surface, the conical surface radius of the conical surface decreases from top to bottom, the inner surface of the movable sleeve is a conical surface, the conical surface radius of the conical surface decreases from top to bottom, the outer surface of the clamping sleeve is clearance-matched with the inner surface of the movable sleeve, and the movable push rod can be completely in contact with the lower surface of the workpiece when supporting the workpiece. The movable ejector pin is pressed against the workpiece and moves up and down under the action of the workpiece. When it moves to the appropriate position, the movable sleeve is driven to move up through the movable block. The inner cone surface of the movable sleeve moves up to act on the outer cone surface of the clamping sleeve. The clamping sleeve is squeezed and contracted to clamp the movable ejector pin, thereby limiting the movement of the movable ejector pin and playing the role of fixed support. The downward movement distance of the movable ejector pin depends entirely on the action force of the workpiece, that is, the downward movement distance of the movable ejector pin is continuously adjustable and can be suitable for workpieces in different situations. When multiple supporting heads are used in combination to support the workpiece, the downward movement distance of the movable ejector pin of each supporting head varies according to the degree of curvature of the lower surface of the workpiece. Therefore, it is possible to support the workpiece with a curved lower surface and maintain the natural curvature of the workpiece. The structure is ingenious and the operation is simple.

[0022] 2. The support jig for processing curved plate materials of the present invention, wherein the clamping sleeve further comprises a first sleeve having a conical outer surface and a second sleeve having a cylindrical outer surface, the bottom surface of the first sleeve is connected to the top surface of the second sleeve, the first sleeve is provided with a plurality of first grooves along the axial direction, the first grooves extend to the second sleeve, the second sleeve is provided with a plurality of second grooves along the axial direction, the second sleeve extends to the first sleeve, and the clamping sleeve is used to replace the steel ball clamping mechanism in the original scheme, which has a simple structure and eliminates the processing process of installing steel balls, thereby greatly improving the processing efficiency of the support head; in addition, through the arrangement of the first groove and the second groove, and the first groove extends to the second sleeve without cutting the second sleeve, similarly, the second groove extends to the first sleeve without cutting, thereby enhancing the contraction force of the clamping sleeve and the stability of the structure, thereby ensuring the stability of the clamping sleeve in clamping the movable push rod, thereby ensuring the stable support of the push rod to the workpiece.

[0023] 3. The support jig for processing curved plate materials of the present invention has a plurality of mounting blocks arranged on the lower surface of the movable sleeve, a through hole for the mounting blocks to pass through is opened on the bottom cover, the mounting blocks of the movable sleeve respectively pass through the through holes of the bottom cover and are fastened to the movable blocks, a through hole is opened in the center of the movable block, the inner surface of the lower end of the through hole has an inward flange, the lower end of the push rod passes through the through hole of the movable block, and the lower surface of the end of the push rod is in contact with the upper surface of the flange, and the push rod is also provided with a locking nut, which is locked by the movable block The through-hole flange on the push rod realizes the connection between the push rod and the movable block, and then is locked by a nut. The structure is simple and easy to disassemble and assemble. There is still a small amount of adjustable space between the push rod and the movable block. When the push rod drives the movable block to move up and down, it has a certain adaptive adjustment space to balance the driving force, ensure the stability and balance of the drive, and prevent jamming. In addition, the top surface of the head is an arc surface or a spherical surface. The setting of the arc surface or the spherical surface makes the support for the workpiece a point contact support, thereby ensuring the accuracy of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 It is a schematic diagram of the structure of the support fixture used for processing curved plate materials of the present invention;

[0025] Attached Figure 2 A top view of a support jig for processing curved plate materials according to the present invention;

[0026] Attached Figure 3 A cross-sectional view of the support head structure of the support jig for processing curved plate materials of the present invention;

[0027] Attached Figure 4 It is a schematic diagram of the local structure of the support head in the support fixture for processing curved plate materials of the present invention.

[0028] In the above drawings: 6, first mounting plate; 7, second mounting plate; 8, support head; 1a, top cover; 2a, shell; 3a, bottom cover; 4a, movable push rod; 5a, clamping sleeve; 6a, movable block; 7a, movable sleeve; 8a, second through hole; 9a, push rod; 11a, outer sleeve; 12a, spring; 13a, push head; 14a, connecting rod; 15a, fixed block; 16a, outer flange; 21a, first jacket; 22a, second jacket; 23a, first wire groove; 24a, second wire groove; 26a, mounting block; 27a, flange; 28a, locking nut; 9, support column; 10, first through hole; 11, workpiece; 12, flange; 13, locking hole. DETAILED DESCRIPTION

[0029] Embodiment 1: A support jig for processing curved plate materials, comprising a first mounting plate 6, a second mounting plate 7 and a plurality of support heads 8 arranged in parallel, wherein the first mounting plate 6 and the second mounting plate 7 are connected by a plurality of support columns 9, the first mounting plate 6 is provided with a plurality of first through holes 10, the upper ends of the support heads 8 respectively extend from the first through holes 10 and are mounted and connected to the first mounting plate 6, and a workpiece 11 is placed above the first mounting plate 6 and is in contact with the support heads 8;

[0030] The support head 8 comprises a top cover 1a, a cylindrical shell 2a, a bottom cover 3a, a movable push rod 4a, a clamping sleeve 5a, a movable block 6a and a movable sleeve 7a. The upper and lower ends of the shell 2a are respectively installed and connected with the top cover 1a and the bottom cover 3a, so as to form a cavity between the top cover 1a, the shell 2a and the bottom cover 3a. A second through hole 8a is opened in the center of the top cover 1a. The lower part of the movable push rod 4a penetrates into the cavity from the second through hole 8a. The clamping sleeve 5a is sleeved on the outer side of the movable push rod 4a. The movable sleeve 7a is sleeved on the outer side of the clamping sleeve 5a, and the movable sleeve 7a can move up and down in the cavity. The lower part of the movable sleeve 7a passes through the bottom cover 3a and is fixedly connected to the movable block 6a. The movable block 6a is connected with a push rod 9a.

[0031] The movable ejector rod 4a comprises an outer sleeve 11a, a spring 12a, a ejector head 13a and a connecting rod 14a, wherein the ejector head 13a is mounted on the upper end of the outer sleeve 11a, the connecting rod 14a is embedded from the lower end of the outer sleeve 11a and is movably connected to the outer sleeve 11a, the spring 12a is arranged between the ejector head 13a and the connecting rod 14a, the lower end of the connecting rod 14a is embedded in a fixed block 15a, the lower end of the fixed block 15a is embedded in the central through hole of the bottom cover 3a and is fixedly connected to the bottom cover 3a, the outer surface of the clamping sleeve 5a is a conical surface, the conical surface radius of the conical surface decreases from top to bottom, the inner surface of the movable sleeve 7a is a conical surface, the conical surface radius of the conical surface decreases from top to bottom, and the outer surface of the clamping sleeve 5a is clearance-matched with the inner surface of the movable sleeve 7a;

[0032] The clamping sleeve 5a further includes a first sleeve 21a with a conical outer surface and a second sleeve 22a with a cylindrical outer surface. The bottom surface of the first sleeve 21a is connected to the top surface of the second sleeve 22a. The first sleeve 21a is provided with a plurality of first grooves 23a along the axial direction, and the first grooves 23a extend to the second sleeve 22a. The second sleeve 22a is provided with a plurality of second grooves 24a along the axial direction, and the second sleeve 22a extends to the first sleeve 21a.

[0033] A plurality of mounting blocks 26a are provided on the lower surface of the movable sleeve 7a, and a through hole is opened on the bottom cover 3a for the mounting blocks 26a to pass through. The mounting blocks 26a of the movable sleeve 7a respectively pass through the through holes of the bottom cover 3a and are fastened to the movable block 6a. A through hole is opened in the center of the movable block 6a, and the inner surface of the lower end of the through hole has an inward flange portion 27a. The lower end of the push rod 9a passes through the through hole of the movable block 6a, and the lower surface of the end of the push rod 9a is in contact and connected with the upper surface of the flange portion 27a. The push rod 9a also has a locking nut 28a.

[0034] The number of the above-mentioned first through holes 10 and the supporting heads 8 is the same, both are 6; the inner wall of the above-mentioned first through hole 10 has an inward flange 12, and the flange 12 has a plurality of locking holes 13 along the circumferential direction, and the above-mentioned supporting head 8 is installed and connected with the locking holes 13 through screws; the above-mentioned bottom cover 3a is connected to the bottom surface of the shell 2a through a plurality of screws; the upper part of the above-mentioned fixing block 15a is located in the clamping sleeve 5a.

[0035] Embodiment 2: A support jig for processing curved plate material, comprising a first mounting plate 6, a second mounting plate 7 and a plurality of support heads 8 arranged in parallel, wherein the first mounting plate 6 and the second mounting plate 7 are connected by a plurality of support columns 9, the first mounting plate 6 is provided with a plurality of first through holes 10, the upper ends of the support heads 8 respectively extend from the first through holes 10 and are mounted and connected to the first mounting plate 6, and a workpiece 11 is placed above the first mounting plate 6 and is in contact with the support heads 8;

[0036] The support head 8 comprises a top cover 1a, a cylindrical shell 2a, a bottom cover 3a, a movable push rod 4a, a clamping sleeve 5a, a movable block 6a and a movable sleeve 7a. The upper and lower ends of the shell 2a are respectively installed and connected with the top cover 1a and the bottom cover 3a, so as to form a cavity between the top cover 1a, the shell 2a and the bottom cover 3a. A second through hole 8a is opened in the center of the top cover 1a. The lower part of the movable push rod 4a penetrates into the cavity from the second through hole 8a. The clamping sleeve 5a is sleeved on the outer side of the movable push rod 4a. The movable sleeve 7a is sleeved on the outer side of the clamping sleeve 5a, and the movable sleeve 7a can move up and down in the cavity. The lower part of the movable sleeve 7a passes through the bottom cover 3a and is fixedly connected to the movable block 6a. The movable block 6a is connected with a push rod 9a.

[0037] The movable ejector rod 4a comprises an outer sleeve 11a, a spring 12a, a ejector head 13a and a connecting rod 14a, wherein the ejector head 13a is mounted on the upper end of the outer sleeve 11a, the connecting rod 14a is embedded from the lower end of the outer sleeve 11a and is movably connected to the outer sleeve 11a, the spring 12a is arranged between the ejector head 13a and the connecting rod 14a, the lower end of the connecting rod 14a is embedded in a fixed block 15a, the lower end of the fixed block 15a is embedded in the central through hole of the bottom cover 3a and is fixedly connected to the bottom cover 3a, the outer surface of the clamping sleeve 5a is a conical surface, the conical surface radius of the conical surface decreases from top to bottom, the inner surface of the movable sleeve 7a is a conical surface, the conical surface radius of the conical surface decreases from top to bottom, and the outer surface of the clamping sleeve 5a is clearance-matched with the inner surface of the movable sleeve 7a;

[0038] The clamping sleeve 5a further includes a first sleeve 21a with a conical outer surface and a second sleeve 22a with a cylindrical outer surface. The bottom surface of the first sleeve 21a is connected to the top surface of the second sleeve 22a. The first sleeve 21a is provided with a plurality of first grooves 23a along the axial direction, and the first grooves 23a extend to the second sleeve 22a. The second sleeve 22a is provided with a plurality of second grooves 24a along the axial direction, and the second sleeve 22a extends to the first sleeve 21a.

[0039] A plurality of mounting blocks 26a are provided on the lower surface of the movable sleeve 7a, and a through hole is opened on the bottom cover 3a for the mounting blocks 26a to pass through. The mounting blocks 26a of the movable sleeve 7a respectively pass through the through holes of the bottom cover 3a and are fastened to the movable block 6a. A through hole is opened in the center of the movable block 6a, and the inner surface of the lower end of the through hole has an inward flange portion 27a. The lower end of the push rod 9a passes through the through hole of the movable block 6a, and the lower surface of the end of the push rod 9a is in contact and connected with the upper surface of the flange portion 27a. The push rod 9a also has a locking nut 28a.

[0040] The outer wall of the fixing block 15a has an outer flange 16a; the clamping sleeve 5a is fixedly clamped between the outer flange 16a of the fixing block 15a and the top cover 1a; the top surface of the top head 13a is an arc-shaped surface; the first wire grooves 23a and the second wire grooves 24a are arranged at equal intervals along the circumferential direction; the first wire grooves 23a and the second wire grooves 24a are staggered.

[0041] Working principle: Place the workpiece to be processed, such as a metal sheet, on top of several support heads so that the lower surface of the metal sheet contacts the upper surface of the movable push rod of the support head. Due to the metal characteristics of the metal sheet itself, the surface of the sheet will be warped and uneven to a certain extent. The movable push rod of each support head moves downward for a distance or does not move under the action of the metal sheet. After the movable push rods of each support head are stable, a support surface consistent with the undulation of its lower surface can be determined for the metal sheet placed above it. At this time, push the movable block of each support head upward, and the movable block drives the movable sleeve above it to move upward. The inner cone surface of the movable sleeve moves up and acts on the outer cone surface of the clamping sleeve. The clamping sleeve is squeezed and contracted, clamping the movable push rod and limiting the movement of the movable push rod, so that the movable push rods of the support heads are all in a fixed state, thereby providing stable support for the workpiece placed above it that fits the lower surface of the workpiece, which is convenient for milling and other processing operations on the sheet.

[0042] When the above-mentioned supporting fixture for processing curved plate materials is adopted, its movable push rod can fully contact with the lower surface of the workpiece when supporting the workpiece and move up and down under the action of the workpiece. When it moves to a suitable position, the movable sleeve is driven to move upward by the movable block, and the inner cone surface of the movable sleeve moves up to act on the outer cone surface of the clamping sleeve. The clamping sleeve is squeezed and contracted, clamping the movable push rod, limiting the movement of the movable push rod, and playing the role of fixed support. The downward movement distance of the movable push rod depends entirely on the force acting on the workpiece, that is, the downward movement distance of the movable push rod is continuously adjustable, which can be suitable for workpieces in different situations. When multiple supporting heads are used in combination to support the workpiece, the downward movement distance of the movable push rod of each supporting head varies according to the degree of curvature of the lower surface of the workpiece. Therefore, it can support the workpiece with a curved lower surface and maintain the natural curvature of the workpiece. The structure is ingenious and the operation is simple. In addition, it adopts the clamping sleeve to replace the steel ball clamping mechanism in the original scheme. The structure is simple and eliminates the processing process of installing steel balls, which greatly improves the processing efficiency of the support head. In addition, through the setting of the first wire groove and the second wire groove, and the first wire groove extends to the second jacket without cutting the second jacket, similarly, the second wire groove extends to the first jacket without cutting, which enhances the contraction force of the clamping sleeve and the stability of the structure, so that the stability of the clamping sleeve clamping the movable push rod can be ensured, and the push rod can stably support the workpiece. In addition, it realizes the connection between the push rod and the movable block through the through-hole flange on the movable block, and then locks it with a nut. The structure is simple and easy to disassemble and assemble. There is still a small amount of adjustable space between the push rod and the movable block. When the push rod drives the movable block to move up and down, it has a certain adaptive adjustment space to balance the driving force, ensure the stability and balance of the drive, and prevent jamming. In addition, the setting of the arc surface or spherical surface makes the support for the workpiece a point contact support, which ensures the accuracy of the support.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A support fixture for processing curved plate materials, characterized in that: The invention comprises a first mounting plate (6), a second mounting plate (7) and a plurality of supporting heads (8) arranged in parallel, wherein the first mounting plate (6) and the second mounting plate (7) are connected via a plurality of supporting columns (9), the first mounting plate (6) is provided with a plurality of first through holes (10), the upper ends of the supporting heads (8) respectively extend out from the first through holes (10) and are mounted and connected to the first mounting plate (6), and a workpiece (11) is placed above the first mounting plate (6) and is in contact and connected to the supporting heads (8); The support head (8) comprises a top cover (1a), a cylindrical shell (2a), a bottom cover (3a), a movable push rod (4a), a clamping sleeve (5a), a movable block (6a) and a movable sleeve (7a); the upper and lower ends of the shell (2a) are respectively connected to the top cover (1a) and the bottom cover (3a), so that a cavity is formed between the top cover (1a), the shell (2a) and the bottom cover (3a); a second through hole (8a) is opened in the center of the top cover (1a); the lower part of the movable push rod (4a) penetrates into the cavity from the second through hole (8a); the clamping sleeve (5a) is sleeved on the outer side of the movable push rod (4a); the movable sleeve (7a) is sleeved on the outer side of the clamping sleeve (5a); and the movable sleeve (7a) can move up and down in the cavity; the lower part of the movable sleeve (7a) passes through the bottom cover (3a) and is fixedly connected to the movable block (6a); and the movable block (6a) is connected to a push rod (9a); The movable ejector rod (4a) comprises an outer sleeve (11a), a spring (12a), an ejector head (13a) and a connecting rod (14a), wherein the ejector head (13a) is mounted on the upper end of the outer sleeve (11a), the connecting rod (14a) is embedded from the lower end of the outer sleeve (11a) and is movably connected to the outer sleeve (11a), the spring (12a) is arranged between the ejector head (13a) and the connecting rod (14a), and the lower end of the connecting rod (14a) is embedded in a The fixing block (15a) has a lower end which is embedded in the central through hole of the bottom cover (3a) and is fixedly connected to the bottom cover (3a); the outer surface of the clamping sleeve (5a) is a conical surface, the radius of which decreases from top to bottom; the inner surface of the movable sleeve (7a) is a conical surface, the radius of which decreases from top to bottom; and the outer surface of the clamping sleeve (5a) is clearance-matched with the inner surface of the movable sleeve (7a); The clamping sleeve (5a) further comprises a first sleeve (21a) having a conical outer surface and a second sleeve (22a) having a cylindrical outer surface, the bottom surface of the first sleeve (21a) being connected to the top surface of the second sleeve (22a), the first sleeve (21a) being provided with a plurality of first grooves (23a) along the axial direction, the first grooves (23a) extending to the second sleeve (22a), the second sleeve (22a) being provided with a plurality of second grooves (24a) along the axial direction, the second sleeve (22a) extending to the first sleeve (21a); A plurality of mounting blocks (26a) are arranged on the lower surface of the movable sleeve (7a); a through hole for the mounting blocks (26a) to pass through is formed on the bottom cover (3a); the mounting blocks (26a) of the movable sleeve (7a) respectively pass through the through holes of the bottom cover (3a) and are fastened to the movable blocks (6a); a through hole is formed in the center of the movable block (6a); the inner surface of the lower end of the through hole has an inward flange (27a); the lower end of the push rod (9a) passes through the through hole of the movable block (6a), and the lower surface of the end of the push rod (9a) is in contact with the upper surface of the flange (27a); the push rod (9a) also has a locking nut (28a).

2. The supporting jig for processing curved sheet materials according to claim 1, characterized in that: The number of the first through holes (10) is the same as that of the support heads (8), which are both 3 to 9.

3. The supporting jig for processing curved plate materials according to claim 1, characterized in that: The inner wall of the first through hole (10) has an inward flange (12), and the flange (12) has a plurality of locking holes (13) along the circumference. The support head (8) is installed and connected to the locking holes (13) via screws.

4. The supporting jig for processing curved sheet materials according to claim 1, characterized in that: The bottom cover (3a) is connected to the bottom surface of the housing (2a) via a plurality of screws.

5. The supporting jig for processing curved sheet materials according to claim 1, characterized in that: The upper part of the fixing block (15a) is located inside the clamping sleeve (5a).

6. The supporting jig for processing curved plate material according to claim 1, characterized in that: The outer wall of the fixing block (15a) has an outer flange (16a).

7. The supporting jig for processing curved plate material according to claim 6, characterized in that: The clamping sleeve (5a) is fixedly clamped between the outer flange (16a) of the fixing block (15a) and the top cover (1a).

8. The supporting jig for processing curved plate material according to claim 1, characterized in that: The top surface of the plug (13a) is an arc-shaped surface or a spherical surface.

9. The supporting jig for processing curved plate material according to claim 1, characterized in that: The first wire grooves (23a) and the second wire grooves (24a) are arranged at equal intervals along the circumferential direction.

10. The supporting jig for processing curved plate material according to claim 1 or 9, characterized in that: The first wire grooves (23a) and the second wire grooves (24a) are arranged alternately.

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