Thin plate multi-shaft tension-compression linkage machine tool
By designing a thin plate multi-axis tensioning linkage machine tool using machine tool holder, clamping clamp and jaw tensioning bracket, the problem of prestressed stretching and multi-axis linkage of metal thin plates in the prior art is solved, and the thin plate is realized uniform strain and three-dimensional forming avoid wrinkle defects.
Patent Information
- Application Number
- CN202411396381.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-02-07
AI Technical Summary
The existing linkage machine tools cannot realize the prestressed stretching of metal thin plates and multi-axis and multi-action linkage, resulting in difficulty in uniform strain of thin plates and unable to effectively overcome the defects of forming and wrinkling.
A thin plate multi-axis tension-pressure linkage machine tool is designed, using a machine tool base, clamping clamp and jaw tension bracket. The prestressed tensile and plastic deformation of the metal thin plate are achieved through the linkage mechanism driven by the hydraulic cylinder. The hydraulic cylinder of this machine tool can be synchronously or out of synchronously and dynamically adjusted according to the shape requirements of the plate.
The uniform strain and three-dimensional forming of metal thin plates are achieved, wrinkle defects are avoided, and the quality and efficiency of thin plate forming are improved.
Smart Images
Figure CN119387435A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of thin plate three-dimensional forming equipment, in particular to a thin plate multi-axis tension-pressing linkage machine tool. Background Art
[0002] The multi-axis tension-press linkage machine tool for thin plates is a linkage machine tool for tensioning and stretching and pressing thin metal plates, and is used for the three-dimensional forming of large metal thin plates. The linkage machine tool for tensioning and stretching and pressing thin metal plates disclosed in the present invention is used for the three-dimensional forming of large metal thin plates. In order to ensure uniform strain of the sheet metal, the prestressed sheet metal is stretched and the mold is pushed up to make the sheet metal as close to the film as possible. For the concave shape, the upward pressure linkage is adopted to ensure the minimum or zero rebound. Such a machine tool is invented to form the three-dimensional shape of thin plates. The linkage tension-press linkage machine tool clamps the thin plate and moves to both sides. The two hydraulic cylinders on one side move synchronously and move in linkage with each other until the sheet metal is tensioned and the lower workbench moves up. At the same time, the jaws are deformed into an arc shape and the upper workbench is pressed down. These linkages make the metal sheet fit the mold. Therefore, we need a multi-axis tension-press linkage machine tool for thin plates.
[0003] However, the currently used linkage machine tools are unable to achieve prestressed stretching of thin plates and multi-axis, multi-action linkage operations during operation, and are unable to achieve uniform strain of thin plates and overcome the defects of wrinkling in most thin plate forming processes. Summary of the invention
[0004] The purpose of the present invention is to provide a multi-axis thin plate tension and compression linkage machine tool to solve the problems raised in the above background technology.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A multi-axis tension-press linkage machine tool for thin plates, comprising a machine tool base divided into two identical front and rear machine tool bases, which are connected as a whole by a connecting block in the middle, and are used to support the tension linkage mechanism on the left and right sides, and support the ninth hydraulic cylinder, the tenth hydraulic cylinder, the eleventh hydraulic cylinder, and the twelfth hydraulic cylinder for fixing the pressing worktable, and are used to fix the upper main worktable and the upper right auxiliary worktable and the upper left auxiliary worktable. The tension mechanism is some mechanisms on the right tension bracket and the left tension bracket to realize the linkage action. The movement of the right tension bracket and the left tension bracket is realized by the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder, and the fourth hydraulic cylinder. These four hydraulic cylinders The left front and rear first and second hydraulic cylinders synchronously complete the movement of the bracket, but the left and right sides can be linked synchronously or asynchronously, depending on the relative position of the plate on the mold. The left stretching bracket and the central fixed jaw stretching bracket on the upper main workbench can move axially and rotate within a certain angle relative to the jaw stretching bracket. The jaw stretching bracket completes the extension and contraction, which is symmetrically distributed on the left and right ends of the machine tool to achieve prestressed stretching and plastic deformation of the metal sheet. The left and right hydraulic cylinders can stretch synchronously or asynchronously. At the same time, the left and right hydraulic cylinders distributed on the same side need to stretch synchronously. The rotation of the jaw stretching bracket within a certain angle is completed by the clamp rotating hydraulic cylinder, with a rotating hydraulic cylinder on each side. The two hydraulic cylinders can be linked synchronously or asynchronously to drive the clamp to rotate.
[0007] Preferably, the right stretching bracket, the left stretching bracket and the clamping pliers are symmetrical on the left and right and are connected by a jaw stretching bracket to clamp the two ends of the metal sheet to complete the three-dimensional forming of the metal sheet. The forming requires the clamping pliers on both sides to stretch, swing up and down, swing back and forth, and rotate in linkage actions.
[0008] Preferably, the up and down swinging is achieved by the first clamp pitch hydraulic cylinder and the second clamp pitch hydraulic extension and retraction, so that the clamp can swing up and down, with a pair of hydraulic cylinders on each side, and each pair is required to be synchronously linked, but the left and right sides can be synchronized or asynchronous.
[0009] Preferably, the clamping pliers on the right stretching bracket and the left stretching bracket can be rotated to a certain degree to meet the requirements of forming a twisted shape during the stretching and pressing of the metal sheet.
[0010] Preferably, the clamping pliers are composed of a row of separate small jaws hinged to each other, and can automatically twist a certain curve according to the shape of the clamped ends of the curved surface of the metal sheet to facilitate better shaping.
[0011] Preferably, the clamping pliers on each side swing back and forth by means of a first jaw horizontal swing bar and a second jaw horizontal swing bar, and this pair of hydraulic cylinders need to be linked simultaneously to allow the metal sheet to be stretched according to different requirements in the horizontal plane.
[0012] Preferably, the upper main workbench for installing the mold can be moved left and right to meet the needs of installing larger metal sheet molds.
[0013] A method for using a thin plate multi-axis tension-press linkage machine tool comprises the following steps:
[0014] S1. Connect two machine tool bases in parallel to bear the machine tool load and meet the forces generated by all functional actions of the machine tool. Fix the base of the pressing worktable and the hydraulic cylinder of the upper main worktable. The right stretching bracket and the left stretching bracket can slide left and right on the sliding base. The sliding is driven by the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder and the fourth hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder move synchronously, and the third hydraulic cylinder and the fourth hydraulic cylinder move synchronously. However, the left and right hydraulic cylinders can be linked synchronously or asynchronously.
[0015] S2, the sliding seat that can slide on the machine tool seat is hinged to the right stretching bracket and the left stretching bracket, and the sliding seat is connected to the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder, and the fourth hydraulic cylinder. These hydraulic cylinders push the sliding seat to move left and right. The pair of hydraulic cylinders on the left or right side need to be displaced synchronously, but the two pairs of hydraulic cylinders on the left and right sides can be synchronous or asynchronously linked. Because they are hinged, the right stretching bracket and the left stretching bracket can swing up and down under the action of the first clamp pitch hydraulic cylinder and the second clamp pitch hydraulic pressure to achieve pitch, so as to drive the clamp pitch;
[0016] S3, setting the main lifting workbench and the right and left auxiliary lifting workbench. When the Z-direction deformation of the metal sheet is relatively large, the main lifting workbench can be raised under the action of the seventh and eighth hydraulic cylinders to continue stretching the sheet. Considering the uneven deformation of both ends of the metal sheet, the seventh and eighth hydraulic cylinders can be linked according to a certain functional relationship to complete the tilting of the main lifting workbench to a certain angle left and right;
[0017] S4. Install the mold on the pressing workbench, and apply pressure downward to the metal sheet under the action of the ninth hydraulic cylinder, the tenth hydraulic cylinder, the eleventh hydraulic cylinder, and the twelfth hydraulic cylinder. Among the four hydraulic cylinders, the ninth hydraulic cylinder and the twelfth hydraulic cylinder move synchronously, and the tenth hydraulic cylinder and the eleventh hydraulic cylinder move synchronously. However, the above two groups can be linked synchronously or asynchronously, and the pressing device can move left and right to apply pressure according to the shape requirements of different positions of the metal sheet.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] 1. The machine tool base, clamping pliers and jaw stretching bracket are used to fix the metal sheet through the clamping pliers, and the jaw stretching bracket is fixed in the center of the left stretching bracket and the upper main workbench. It can move axially and rotate within a certain angle relative to the jaw stretching bracket. The jaw stretching bracket completes the extension and contraction. It is symmetrically distributed at the left and right ends of the machine tool to achieve the prestressed stretching and plastic deformation effect of the metal sheet.
[0020] 2. Use a machine tool base, a first hydraulic cylinder, a downward pressing worktable, an upward main worktable and a twelfth hydraulic cylinder to connect the two machine tool bases in parallel, bear the machine tool load, and meet the forces generated by all functional actions of the machine tool. Fix the base of the downward pressing worktable and the hydraulic cylinder of the upward main worktable. The right stretching bracket and the left stretching bracket can slide left and right on them driven by the sliding seat. The sliding is driven by the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder and the fourth hydraulic cylinder. The first hydraulic cylinder and the second hydraulic cylinder move synchronously, and the third hydraulic cylinder and the fourth hydraulic cylinder move synchronously. However, the left and right hydraulic cylinders can be linked synchronously or asynchronously. The operation of the hydraulic cylinders at various positions enables the downward pressing worktable combined with the upward main worktable, the upward right auxiliary worktable and the upward left auxiliary worktable to achieve stable processing and forming of the thin plate, thereby preventing the problem of wrinkling defects during thin plate forming. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 A three-dimensional schematic diagram of the multi-axis tension-compression linkage machine tool of the present invention;
[0022] Figure 2 It is a stretch forming linkage mechanism;
[0023] Figure 3 It is a linkage mechanism for upper forming and lower pressing forming;
[0024] In the figure: 1. the first hydraulic cylinder; 2. the second hydraulic cylinder; 3. the third hydraulic cylinder; 4. the fourth hydraulic cylinder; 5. the machine tool base; 6. the pressing workbench; 7. the right stretching bracket; 8. the left stretching bracket; 9. the upper main workbench; 10. the bracket body; 11. the first clamp pitch hydraulic cylinder; 12. the second clamp pitch hydraulic; 13. the first jaw horizontal swing bar; 14. the jaw shaping device; 15. the clamping clamp; 16. the clamp rotating hydraulic cylinder; 17. the stretching forming hydraulic cylinder; 18. the jaw stretching bracket; 19. the second jaw horizontal swing bar; 20. the upper right auxiliary workbench; 21. the upper left auxiliary workbench; 22. the fifth hydraulic cylinder; 23. the sixth hydraulic cylinder; 24. the seventh hydraulic cylinder; 25. the eighth hydraulic cylinder; 26. the ninth hydraulic cylinder; 27. the tenth hydraulic cylinder; 28. the eleventh hydraulic cylinder; 29. the twelfth hydraulic cylinder; 30. the sliding seat. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0026] See also Figure 1-3 , the present invention provides a technical solution for a thin plate multi-axis tension and compression linkage machine tool:
[0027] A multi-axis tension-press linkage machine tool for thin plates, including a machine tool base 5 divided into two identical front and rear machine tool bases 5, which are connected in the middle by a connecting block, and are used to support the tension linkage mechanism on the left and right sides, support the ninth hydraulic cylinder 26, the tenth hydraulic cylinder 27, the eleventh hydraulic cylinder 28, and the twelfth hydraulic cylinder 29 for fixing the pressing worktable 6, and are used to fix the main worktable 9 and the right auxiliary worktable 20 and the left auxiliary worktable 21. The tension mechanism is some mechanisms for realizing the linkage action on the right tension bracket 7 and the left tension bracket 8. The movement of the right tension bracket 7 and the left tension bracket 8 is realized by the first hydraulic cylinder 1, the second hydraulic cylinder 2, the third hydraulic cylinder 3, and the fourth hydraulic cylinder 4. Of these four hydraulic cylinders, the first hydraulic cylinder 1 and the second hydraulic cylinder 2 on the left or right front and back synchronously complete the movement of the bracket, but the left and right can be linked synchronously or asynchronously. According to the relative position of the plate in the mold, the left stretching bracket 8 and the center fixed jaw stretching bracket 18 on the top main workbench 9 can move axially and rotate within a certain angle relative to the jaw stretching bracket 18. The jaw stretching bracket 18 is used to complete the extension and contraction. It is symmetrically distributed on the left and right ends of the machine tool to achieve prestressed stretching and plastic deformation of the metal sheet. The hydraulic cylinders on the left and right ends can be stretched synchronously or asynchronously. At the same time, the left and right hydraulic cylinders distributed on the same side need to be stretched synchronously. The rotation of the jaw stretching bracket 18 within a certain angle is completed by the clamp rotating hydraulic cylinder 16, and there is a rotating hydraulic cylinder on each side. These two hydraulic cylinders can be linked synchronously or asynchronously, with the purpose of driving the clamp 15 to rotate.
[0028] The right stretching bracket 7, the left stretching bracket 8, and the clamping pliers 15 are symmetrical on the left and right and are connected by a jaw stretching bracket 18. They are used to clamp the two ends of the metal sheet to complete the three-dimensional forming of the metal sheet. The forming requires the clamping pliers 15 on both sides to stretch, swing up and down, swing back and forth, and rotate in linkage actions.
[0029] The up and down swing is achieved by the extension and retraction of the first clamp pitch hydraulic cylinder 11 and the second clamp pitch hydraulic cylinder 12, so that the clamp 15 can swing up and down. There is a pair of hydraulic cylinders on each side, and each pair is required to be synchronously linked, but the left and right sides can be synchronized or asynchronous.
[0030] The clamping pliers 15 on the right stretching bracket 7 and the left stretching bracket 8 can be rotated to a certain degree to meet the forming of the twisted shape in the tension and compression forming of the metal sheet.
[0031] The clamping pliers 15 are composed of a row of small individual jaws hinged to each other, and can automatically twist a certain curve according to the shape of the clamped ends of the curved surface of the metal sheet to facilitate better shaping.
[0032] The clamping forceps 15 on each side swing back and forth by the first jaw horizontal swing lever 13 and the second jaw horizontal swing lever 19. This pair of hydraulic cylinders needs to be linked simultaneously to stretch the metal sheet according to different requirements in the horizontal plane.
[0033] The upper main workbench 9 for installing the mold can be moved left and right to meet the needs of installing larger metal sheet molds.
[0034] A method for using a thin plate multi-axis tension-press linkage machine tool comprises the following steps:
[0035] S1. Connect two machine tool bases 5 in parallel to bear the machine tool load and meet the forces generated by all functional actions of the machine tool. Fix the base of the pressing worktable 6 and the hydraulic cylinder of the upper main worktable 9. The right stretching bracket 7 and the left stretching bracket 8 can slide left and right on the sliding seat 30. The sliding is driven by the first hydraulic cylinder 1, the second hydraulic cylinder 2, the third hydraulic cylinder 3, and the fourth hydraulic cylinder 4. The first hydraulic cylinder 1 and the second hydraulic cylinder 2 move synchronously, and the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4 move synchronously. However, the left and right hydraulic cylinders can be linked synchronously or asynchronously.
[0036] S2, the sliding seat 30 that can slide on the machine tool seat 5 is hinged to the right stretching bracket 7 and the left stretching bracket 8. The sliding seat 30 is connected to the first hydraulic cylinder 1, the second hydraulic cylinder 2, the third hydraulic cylinder 3, and the fourth hydraulic cylinder 4. These hydraulic cylinders push the sliding seat 30 to move left and right. The pair of hydraulic cylinders on the left or right side need to be displaced synchronously, but the two pairs of hydraulic cylinders on the left and right sides can be synchronous or asynchronously linked. Because they are hinged, the right stretching bracket 7 and the left stretching bracket 8 can swing up and down under the action of the first clamp pitch hydraulic cylinder 11 and the second clamp pitch hydraulic cylinder 12 to achieve pitch, so as to drive the clamp 15 to pitch;
[0037] S3, setting the main lifting workbench 9 and the right lifting auxiliary workbench 20 and the left lifting auxiliary workbench 21. When the deformation of the metal sheet in the Z direction is relatively large, the main lifting workbench 9 can be raised under the action of the seventh hydraulic cylinder 24 and the eighth hydraulic cylinder 25 to continue to stretch the sheet. Considering the uneven deformation of the two ends of the metal sheet, the seventh hydraulic cylinder 24 and the eighth hydraulic cylinder 25 can be linked according to a certain functional relationship to complete the tilting of the main lifting workbench 9 to the left and right at a certain angle;
[0038] S4. Then install the mold on the pressing workbench 6, and apply pressure downward to the metal sheet under the action of the ninth hydraulic cylinder 26, the tenth hydraulic cylinder 27, the eleventh hydraulic cylinder 28, and the twelfth hydraulic cylinder 29. Among the four hydraulic cylinders, the ninth hydraulic cylinder 26 and the twelfth hydraulic cylinder 29 move synchronously, and the tenth hydraulic cylinder 27 and the eleventh hydraulic cylinder 28 move synchronously. However, the above two groups can be linked synchronously or asynchronously, and the pressing device can move left and right to apply pressure according to the shape requirements of different positions of the metal sheet.
[0039] It should be noted that the present invention is a multi-axis tension-press linkage machine tool for thin plates. When in use, firstly, two machine tool bases 5 are connected in parallel to bear the machine tool load, fix the base of the pressing worktable 6 and the hydraulic cylinder of the upper main worktable 9, and the right stretching bracket 7 and the left stretching bracket 8 can slide left and right on the sliding seat 30. The sliding is driven by the first hydraulic cylinder 1, the second hydraulic cylinder 2, the third hydraulic cylinder 3, and the fourth hydraulic cylinder 4, wherein the first hydraulic cylinder 1 and the second hydraulic cylinder 2 move synchronously, and the third hydraulic cylinder 3 and the fourth hydraulic cylinder 4 move synchronously. The sliding seat 30 that can slide on the machine tool seat 5 is hinged to the right stretching bracket 7 and the left stretching bracket 8. The sliding seat 30 is connected to the first hydraulic cylinder 1, the second hydraulic cylinder 2, the third hydraulic cylinder 3, and the fourth hydraulic cylinder 4. These hydraulic cylinders push the sliding seat 30 to move left and right. The pair of hydraulic cylinders on the left or right side need to move synchronously. Because they are hinged, the right stretching bracket 7 and the left stretching bracket 8 can swing up and down under the action of the first clamp pitch hydraulic cylinder 11 and the second clamp pitch hydraulic cylinder 12, so as to drive the clamp 15 to pitch. When the thin plate is deformed greatly in the Z direction, the upper main working table 9 can be raised under the action of the seventh hydraulic cylinder 24 and the eighth hydraulic cylinder 25 to continue stretching the thin plate. Considering the uneven deformation of the two ends of the metal thin plate, the seventh hydraulic cylinder 24 and the eighth hydraulic cylinder 25 can be linked according to a certain functional relationship to complete the tilting of the upper main working table 9 to a certain angle, and the mold is installed on the lower pressing table 6. Under the action of the ninth hydraulic cylinder 26, the tenth hydraulic cylinder 27, the eleventh hydraulic cylinder 28, and the twelfth hydraulic cylinder 29, pressure is applied downward to the metal thin plate. The four Among the hydraulic cylinders, the ninth hydraulic cylinder 26 and the twelfth hydraulic cylinder 29 move synchronously, and the tenth hydraulic cylinder 27 and the eleventh hydraulic cylinder 28 move synchronously, but the above two groups can be synchronously or asynchronously linked. The pressing device can move left and right to apply pressure according to the shape requirements of different positions of the metal sheet. For the three-dimensional curved surface of the metal sheet, stretching and pushing can only meet the convex three-dimensional curved surface of the thin plate, while for the concave curved surface, the above functions cannot complete the concave curved surface and can only be completed by pressing down. In this way, a multi-axis tension and pressing linkage machine tool for thin plates is completed.
[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A multi-axis tension and compression linkage machine tool for thin plates, characterized in that: The invention comprises a machine tool base (5) divided into two identical front and rear machine tool bases (5), which are connected in the middle by a connecting block, and are used to support the stretching linkage mechanism on the left and right sides, support and fix the ninth hydraulic cylinder (26), the tenth hydraulic cylinder (27), the eleventh hydraulic cylinder (28), and the twelfth hydraulic cylinder (29) for fixing the pressing worktable (6), and are used to fix the upper main worktable (9) and the upper right auxiliary worktable (20) and the upper left auxiliary worktable (21). The stretching mechanism is some mechanisms on the right stretching bracket (7) and the left stretching bracket (8) for realizing linkage action. The movement of the right stretching bracket (7) and the left stretching bracket (8) is controlled by the first hydraulic cylinder (1), the second hydraulic cylinder (2), the third hydraulic cylinder (3), the fourth hydraulic cylinder (4 ), the four hydraulic cylinders, among which the left (or right) front and rear first hydraulic cylinder (1) and the second hydraulic cylinder (2) synchronously complete the movement of the bracket, but the left and right can be linked synchronously or asynchronously, depending on the relative position of the plate in the mold. The left stretching bracket (8) and the center fixed jaw stretching bracket (18) on the upper main workbench (9) can move axially and rotate within a certain angle relative to the jaw stretching bracket (18). The jaw stretching bracket (18) completes the extension and contraction, which is symmetrically distributed on the left and right ends of the machine tool to achieve prestressed stretching and plastic deformation of the metal sheet. The left and right hydraulic cylinders can stretch synchronously or asynchronously. At the same time, the left and right hydraulic cylinders distributed on the same side need to stretch synchronously. The rotation of the jaw stretching bracket (18) within a certain angle is completed by the clamp rotating hydraulic cylinder (16), and there is a rotating hydraulic cylinder on each side. The two hydraulic cylinders can be linked synchronously or asynchronously, with the purpose of driving the clamp (15) to rotate.
2. The multi-axis tension-pressing machine tool for thin plates according to claim 1, characterized in that: The right stretching bracket (7), the left stretching bracket (8), and the clamping pliers (15) are symmetrical on the left and right and are connected by a jaw stretching bracket (18) to clamp the two ends of the metal sheet to complete the three-dimensional forming of the metal sheet. The forming requires the clamping pliers (15) on both sides to stretch, swing up and down, swing back and forth, and rotate in linkage.
3. The multi-axis tension-pressing machine tool for thin plates according to claim 1, characterized in that: The up and down swing is achieved by the extension and retraction of the first clamp pitch hydraulic cylinder (11) and the second clamp pitch hydraulic cylinder (12), so that the clamp (15) swings up and down. There is a pair of hydraulic cylinders on each side, and each pair is required to be synchronously linked. However, the left and right sides can be synchronous or asynchronous.
4. The multi-axis tension-pressing machine tool for thin plates according to claim 1, characterized in that: The clamping pliers (15) on the right stretching bracket (7) and the left stretching bracket (8) can be rotated to a certain degree to meet the requirements of forming a twisted shape during the drawing and pressing of the metal sheet.
5. The multi-axis tension-pressing machine tool for thin plates according to claim 1, characterized in that: The clamping pliers (15) are composed of a row of small individual jaws hinged to each other, and can automatically twist a certain curve according to the shape of the clamped ends of the curved surface of the metal sheet to facilitate better shaping.
6. The multi-axis tension-pressing machine tool for thin plates according to claim 1, characterized in that: The clamping pliers (15) on each side swing back and forth by means of a first jaw horizontal swinging lever (13) and a second jaw horizontal swinging lever (19). This pair of hydraulic cylinders needs to be linked simultaneously to allow the metal sheet to be extended in the horizontal plane according to different requirements.
7. The multi-axis tension-pressing machine tool for thin plates according to claim 1, characterized in that: The upper main workbench (9) for installing the mold can be moved left and right to meet the needs of installing a larger metal sheet mold.
8. A method for using a multi-axis tension-press linkage machine tool for thin plates, characterized in that: The following steps are involved: S1. Two machine tool bases (5) are connected in parallel to bear the machine tool load and meet the forces generated by all functional actions of the machine tool. The base of the pressing worktable (6) and the hydraulic cylinder of the upper main worktable (9) are fixed. The right stretching bracket (7) and the left stretching bracket (8) can slide left and right on the sliding seat (30). The sliding is driven by the first hydraulic cylinder (1), the second hydraulic cylinder (2), the third hydraulic cylinder (3) and the fourth hydraulic cylinder (4). The first hydraulic cylinder (1) and the second hydraulic cylinder (2) move synchronously, and the third hydraulic cylinder (3) and the fourth hydraulic cylinder (4) move synchronously. However, the left and right hydraulic cylinders can be linked synchronously or asynchronously. S2, a sliding seat (30) that can slide on the machine tool seat (5) is hinged to the right stretching bracket (7) and the left stretching bracket (8), and the sliding seat (30) is connected to the first hydraulic cylinder (1), the second hydraulic cylinder (2), the third hydraulic cylinder (3), and the fourth hydraulic cylinder (4). These hydraulic cylinders push the sliding seat (30) to move left and right. The pair of hydraulic cylinders on the left or right side need to be displaced synchronously, but the two pairs of hydraulic cylinders on the left and right sides can be synchronous or asynchronously linked. Because they are hinged, the right stretching bracket (7) and the left stretching bracket (8) can swing up and down under the action of the first clamp pitch hydraulic cylinder (11) and the second clamp pitch hydraulic cylinder (12) to achieve pitch, so as to drive the clamp (15) to pitch; S3, setting a main lifting worktable (9), a right lifting auxiliary worktable (20), and a left lifting auxiliary worktable (21); when the Z-direction deformation of the metal sheet is relatively large, the main lifting worktable (9) can be lifted up under the action of the seventh hydraulic cylinder (24) and the eighth hydraulic cylinder (25) to continue to stretch the sheet; considering the uneven deformation of the two ends of the metal sheet, the seventh hydraulic cylinder (24) and the eighth hydraulic cylinder (25) can be linked according to a certain functional relationship to complete the tilting of the main lifting worktable (9) to the left and right at a certain angle; S4. Install the mold on the pressing workbench (6). Under the action of the ninth hydraulic cylinder (26), the tenth hydraulic cylinder (27), the eleventh hydraulic cylinder (28) and the twelfth hydraulic cylinder (29), pressure is applied downward to the metal sheet. The ninth hydraulic cylinder (26) and the twelfth hydraulic cylinder (29) of the four hydraulic cylinders move synchronously, and the tenth hydraulic cylinder (27) and the eleventh hydraulic cylinder (28) move synchronously. However, the above two groups can be linked synchronously or asynchronously. The pressing device can move left and right to apply pressure according to the shape requirements of different positions of the metal sheet.