Aluminum alloy sheet drawing and spreading device

Abstract

The application provides an aluminum alloy plate drawing device, and particularly relates to the technical field of aluminum alloy plate drawing, which comprises a drawing table, a first hydraulic cylinder and a second hydraulic cylinder symmetrically arranged on the top surface of the drawing table, and a pressing block which is slidably arranged on the inclined surface of an inclined block away from one side of the small hydraulic cylinder, and two inclined blocks are detachably connected with a jaw plate on the side away from the pressing block. Through the linear positioning mechanism, the drawing force is dispersed to multiple contact points by using multi-point equidistant clamping, so that the stress distribution of the plate is closer to the "linear uniform" state, the local stress concentration in the drawing operation is prevented, the stress distribution is more uniform, the risk of aluminum alloy plate scrap caused by local stress concentration is effectively reduced, the multi-point equidistant clamping increases the heat dissipation path and accelerates heat transfer, and the "dispersed layout" of the clamping points can reduce local temperature concentration, so that the internal stress of the aluminum alloy plate can be uniformly eliminated.

Description

TECHNICAL FIELD

[0001] The application provides an aluminum alloy plate drawing device, and particularly relates to the field of aluminum alloy plate drawing technology. BACKGROUND

[0002] The aluminum alloy plate drawing device, also known as a drawing straightening machine, is mainly used for drawing and flattening aluminum alloy plates, round bars and other materials to meet specific shape, size and performance requirements. The aluminum alloy plate drawing is widely used in the production of high-strength aluminum alloy forgings (especially aluminum alloy plates) for automobiles and aerospace.

[0003] In patent No. CN214813986U, an aluminum alloy part plate drawing mechanism for automobile part production is disclosed. The mechanism fixes one end of the aluminum alloy plate by engaging two pressure plates. The other end is also fixed between the two pressure plates by the same principle, preventing the plate from falling off during drawing.

[0004] However, the existing technology still has some shortcomings. In the existing technology, single-point or surface contact is generally used for clamping and positioning. When clamping with a single point, stress is concentrated at the contact point in the middle of the two ends of the plate, which can easily cause excessive local stress and lead to fine cracks and deformation in the plate (especially for thin-walled and high-toughness aluminum alloy profiles used in aerospace). Using surface contact not only affects the balance and stability of the clamping force, but also affects the heat dissipation of the aluminum alloy plate, making it difficult to release the stress in the aluminum alloy plate.

[0005] Therefore, the present application provides an aluminum alloy plate drawing device to improve the shortcomings of the prior art. SUMMARY

[0006] To overcome the shortcomings of the prior art, the present application provides an aluminum alloy plate drawing device that effectively solves the technical problems raised in the background art.

[0007] To achieve the above purpose, the present application uses the following technical solutions:

[0008] The present application discloses an aluminum alloy plate drawing device, which comprises a drawing table, a first hydraulic cylinder and a second hydraulic cylinder symmetrically arranged on the top surface of the drawing table, a main controller installed on one side of the top of the drawing table, and a linear positioning mechanism arranged between the piston rods of the first hydraulic cylinder and the second hydraulic cylinder.

[0009] It comprises a positioning structure and an adjusting structure.

[0010] The positioning structure comprises concave plates fixedly connected to the end of the piston rod of the first hydraulic cylinder and the second hydraulic cylinder respectively, two concave plates are provided, and the side close to each other of the two concave plates is provided with an array rod, and an even number of hole plates are slidably arranged on the array rod and are equidistantly distributed in the horizontal direction;

[0011] The side away from the concave plate of each hole plate is fixedly provided with a clamping structure;

[0012] It comprises a positioning plate fixedly connected to the side of each hole plate away from the concave plate, a small hydraulic cylinder fixedly installed in the middle of the positioning plate, a pressing block fixedly connected to the end of the piston rod of the small hydraulic cylinder, two inclined blocks slidably arranged on the side of the positioning plate away from the hole plate in an up-down symmetric manner, and the side of the pressing block away from the small hydraulic cylinder is slidably arranged on the inclined surface of the inclined block, and the side of the two inclined blocks away from the pressing block is detachably connected with a jaw plate;

[0013] The adjusting structure is used for adjusting the distance between the clamping structures on the adjacent two hole plates.

[0014] As preferred, the array rod is composed of a plurality of cylindrical rods equidistantly distributed in the vertical direction, each hole plate is provided with a circular hole at a position corresponding to each array rod, and each hole plate is arranged on the corresponding cylindrical rod through the corresponding circular hole and can slide along the cylindrical rod.

[0015] As preferred, the side of the positioning plate away from the hole plate is provided with a T-shaped open slot, the two inclined blocks are slidably connected in the T-shaped open slot through the T-shaped part at the end of the inclined block, the inclined surface of the two inclined blocks is provided with an inner recessed clamping groove, and the upper and lower sides of the pressing block are provided with protruding blocks slidably arranged in the clamping groove.

[0016] As preferred, the bottom of the two concave plates is fixedly provided with a sliding block on both sides, and the top of the pullout table is fixedly provided with a sliding rail, and the sliding block and the sliding rail are in sliding cooperation.

[0017] As preferred, the adjusting structure comprises a servo cylinder fixedly installed on the side of the two concave plates away from each other, a lifting plate slidably arranged on the side of the two concave plates close to each other, a surface of the lifting plate provided with two groups of mirror image inclined grooves, the two groups of mirror image inclined grooves symmetrically arranged on the left and right sides of the central axis of the lifting plate, and each group of mirror image inclined grooves composed of an even number of inclined through grooves, and the top of each hole plate close to the mirror image inclined groove is provided with a sliding convex shaft and arranged in the corresponding through groove through the sliding convex shaft.

[0018] As preferred, the two sides of the lifting plate are provided with dovetail-shaped parts and slidably arranged in the dovetail groove of the inner wall of the concave plate through the dovetail-shaped parts.

[0019] Preferably, the end of the sliding convex shaft arranged in the through groove is provided with a circular limiting part, and the outer diameter of the circular limiting part is larger than the outer diameter of the sliding convex shaft.

[0020] Preferably, the pushing mechanism arranged on the drawing and spreading platform comprises two support plates symmetrically fixed on the drawing and spreading platform, two screws rotatably connected to the support plates, a nut sleeve block threadedly sleeved on the screws, a horizontal slot in the bottom of the nut sleeve block slidably arranged on the support plate, an L-shaped plate fixedly arranged on the top of the nut sleeve block, a horizontal surface on the top of the L-shaped plate, a rectangular protrusion on the side of the horizontal surface away from the support plate, the L-shaped plate located on both sides of the supporting shaft, a synchronous component transmissionally connected between the ends of the two screws, the synchronous component being chain transmission or belt wheel transmission, and a pin shaft arranged on the side of the synchronous component away from the screw, the pin shaft being connected with the shaft of an external driving motor to realize rotation power transmission.

[0021] Preferably, a plurality of supporting shafts are rotatably arranged on the top of the drawing and spreading platform and between the two concave plates, the supporting shafts are horizontally and equidistantly arranged, and the top surface of each supporting shaft is on the same horizontal line as the top surface of the lower jaw plate.

[0022] Preferably, a rotating rod is rotatably connected to the side of the top of the drawing and spreading platform close to the pin shaft, a cotton sleeve is sleeved on the outside of the rotating rod, and when the aluminum alloy plate is horizontally placed on the top surface of the L-shaped plate, the top surface of the aluminum alloy plate is in contact with the bottom of the cotton sleeve.

[0023] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects:

[0024] The aluminum alloy plate drawing and spreading device can disperse the tension to multiple contact points through the linear positioning mechanism and multi-point equidistant clamping, so that the stress distribution of the plate is closer to the "linear uniform" state, the stress is prevented from being locally concentrated during the stretching operation, the stress distribution is more uniform, and the risk of local stress concentration leading to the scrap of the aluminum alloy plate is effectively reduced.

[0025] Meanwhile, the multi-point equidistant clamping improves the clamping stability by increasing the contact position and friction force and combining the "cooperative locking" of each clamping point, and is suitable for high-speed and large-tension stretching scenarios.

[0026] In addition, the multi-point equidistant clamping increases the heat dissipation path and accelerates heat transfer, and the "dispersed layout" of the clamping points can reduce local temperature concentration, so that the internal stress of the aluminum alloy plate can be uniformly eliminated.

[0027] And by adjusting the structure can be according to different specifications aluminum alloy plate width size, flexible adjustment of the spacing of the adjacent set of hole plate clamping structure, make the device can adapt to a variety of width, length of the plate stretching operation, broaden the application range of the device, avoid the problem of changing equipment due to the difference of plate specifications, effectively improve the utilization rate of equipment;

[0028] The push mechanism adopts synchronous transmission of the screw rod and the nut sleeve block of the ball screw structure, which can efficiently and stably convert the rotary power of the driving motor into the linear translation motion of the L-shaped plate, ensuring the uniform speed and accurate position of the aluminum alloy plate during pushing, without manual pushing and avoiding the problems of deviation and jam caused by unstable conveying, thereby significantly improving the conveying efficiency and reliability of the plate.

[0029] The spacer support formed by the supporting shaft at the bottom of the plate disperses the gravity and friction force of the plate during pushing, avoids deformation of the plate caused by excessive local stress, protects the surface quality of the plate, and improves the overall quality of the aluminum alloy plate.

[0030] Meanwhile, the friction force between the cotton sleeve and the top surface of the plate drives the rotating rod to rotate, and the cotton sleeve adsorbs and removes the impurities attached to the aluminum alloy plate, ensuring the cleanliness of the aluminum alloy plate and avoiding the influence of impurities on the clamping effect of the clamping structure. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a front perspective view of the present application;

[0032] Figure 2 is a partial perspective view of the related components at the sliding block and sliding rail in the present application;

[0033] Figure 3 is a partial perspective view of the related components at the positioning structure and clamping component in the present application;

[0034] Figure 4 is a partial perspective view of the related components at the clamping component in the present application;

[0035] Figure 5 is a partial perspective view of the related components at the clamping component in the present application;

[0036] Figure 6 is a partial exploded perspective view of the clamping component in the present application;

[0037] Figure 7 is a partial perspective view of the related components at the adjusting structure in the present application;

[0038] Figure 8 is a partial perspective view of the related components at the concave plate in the present application;

[0039] Figure 9 This is a partial three-dimensional structural diagram of the relevant components at the pushing mechanism in this invention;

[0040] Figure 10 For the present invention Figure 9 Enlarged view of the structure at point A in the middle;

[0041] Figure 11 This is a partial three-dimensional structural diagram of the relevant components in the cross-section state of the support plate in this invention;

[0042] Figure 12 This is a partial front view of the relevant components at the bearing shaft and L-shaped plate in this invention.

[0043] The labels in the diagram represent:

[0044] 1. Display stand; 11. First hydraulic cylinder; 12. Second hydraulic cylinder; 13. Main controller;

[0045] Linear positioning mechanism, including:

[0046] Positioning structure: 21. Concave plate; 2101. Slider; 2102. Slide rail; 22. Array rod; 23. Perforated plate; 24. Clamping component; 241. Positioning plate; 242. Small hydraulic cylinder; 243. Pressing block; 244. Inclined block; 245. Jaw plate;

[0047] Adjustment structure: 25. Servo electric cylinder; 26. Lifting plate; 27. Mirror slant groove; 28. Sliding cam shaft;

[0048] Pushing mechanism: 31. Support shaft; 32. Support plate; 33. Lead screw; 34. Lead screw nut block; 341. L-shaped plate; 35. Synchronization component; 36. Pin shaft; 37. Rotating rod; 371. Cotton sleeve. Detailed Implementation

[0049] The present invention will be further described below with reference to embodiments.

[0050] Example 1:

[0051] like Figures 1 to 6 As shown, an aluminum alloy sheet stretching device includes a stretching platform (1), and a first hydraulic cylinder (11) and a second hydraulic cylinder (12) symmetrically arranged on both sides of the top surface of the stretching platform (1). After the first hydraulic cylinder (11) and the second hydraulic cylinder (12) are started, they are used to generate horizontal torques that move away from each other, providing support for the stretching and lifting force of the aluminum alloy sheet. A main controller (13) is installed on one side of the top of the stretching platform (1).

[0052] A linear positioning mechanism is arranged between the piston rods of the first hydraulic cylinder (11) and the second hydraulic cylinder (12);

[0053] The positioning structure and the adjusting structure are included;

[0054] The positioning structure includes two concave plates (21) fixedly connected to the ends of the piston rods of the first hydraulic cylinder (11) and the second hydraulic cylinder (12), respectively. The bottoms of the two concave plates (21) are fixedly provided with sliding blocks (2101) on both sides. The top of the pull-out stage (1) is fixedly provided with a sliding rail (2102). The sliding blocks (2101) and the sliding rail (2102) are in sliding cooperation. The stability of the translation of the two concave plates (21) is further ensured by the sliding blocks (2101) and the sliding rail (2102).

[0055] The side of each hole plate (23) away from the concave plate (21) is fixedly provided with a clamping structure (24);

[0056] The clamping structure (24) includes a positioning plate (241) fixedly connected to the side of each hole plate (23) away from the concave plate (21). The middle part of the positioning plate (241) is fixedly installed with a small hydraulic cylinder (242). The end of the piston rod of the small hydraulic cylinder (242) is fixedly connected with a pressing block (243). The side of the positioning plate (241) away from the hole plate (23) is slidingly provided with two inclined blocks (244) in an upper-lower symmetrical manner. The side of the two inclined blocks (244) close to each other is provided with an inclined surface. The side of the pressing block (243) away from the small hydraulic cylinder (242) is slidingly arranged on the inclined surface of the inclined block (244). The inclined surfaces of the two inclined blocks (244) are each provided with an inner recessed clamping groove. The upper and lower sides of the pressing block (243) are provided with protruding blocks sliding in the clamping grooves. The stability of the pressing block (243) and the inclined surface of the inclined block (244) is ensured. The side of the positioning plate (241) away from the hole plate (23) is provided with a T-shaped opening groove. The two inclined blocks (244) are slidingly connected to the T-shaped opening groove through the T-shaped parts at the ends thereof. The stability of the sliding of the inclined block (244) on the positioning plate (241) is ensured, and the inclined block (244) will not be separated from the positioning plate (241). The side of each inclined block (244) away from the pressing block (243) is detachably connected with a jaw plate (245). Specifically, the jaw plate (245) is threadedly connected with the inclined block (244) through bolts.

[0057] In use: when working, first place the aluminum alloy plate to be stretched horizontally on each jaw plate (245). Start the small hydraulic cylinder (242) in the middle of the positioning plate (241) on the hole plate (23) to push the pressing block (243), so that the pressing block (243) slides on the inclined surface of the inclined block (244). Due to the action of the inclined surface, the two inclined blocks (244) are caused to slide relative to each other in the T-shaped opening slot of the positioning plate (241), thereby driving the detachable jaw plate (245) to clamp the two ends of the aluminum alloy plate. Since the clamping structure (24) is linearly equidistantly distributed, a multi-point equidistant clamping effect is formed on both sides of the aluminum alloy plate.

[0058] Then the main controller (13) simultaneously starts the first hydraulic cylinder (11) and the second hydraulic cylinder (12), which generate opposite horizontal moments to stretch the aluminum alloy plate to eliminate the stress of the aluminum alloy plate.

[0059] Embodiment two:

[0060] As shown in Figure 1 , Figure 7 , Figure 8 The aluminum alloy plate stretching device further comprises an adjusting structure for adjusting the distance between the clamping structures (24) on the adjacent two hole plates (23).

[0061] The adjusting structure comprises a servo cylinder (25) fixedly installed on the side of the two concave plates (21) away from each other. The side of the two concave plates (21) close to each other is slidably provided with a lifting plate (26). The two sides of the lifting plate (26) are provided with dovetail-shaped parts which are slidably arranged in the dovetail grooves on the inner walls of the two concave plates (21). The surface of the lifting plate (26) is provided with two groups of mirror image inclined grooves (27) which are symmetrically arranged left and right with the central axis of the lifting plate (26) as the reference. Each group of mirror image inclined grooves (27) is composed of an even number of inclined through grooves. The top of each hole plate (23) close to the mirror image inclined grooves (27) is provided with a sliding convex shaft (28) which is slidably arranged in the corresponding through groove. The end of the sliding convex shaft (28) arranged in one end of the through groove is provided with a circular limiting part. The outer diameter of the circular limiting part is larger than the outer diameter of the sliding convex shaft (28), which prevents the sliding convex shaft (28) from radially displacing in the through groove.

[0062] In use: in use, according to the actual width of the aluminum alloy plate to be stretched, the servo cylinder (25) in the adjusting structure is started by the main controller (13). After starting, it will output power to push the lifting plate (26) connected thereto to slide on the side where the concave plate (21) is close to each other. Because the dovetail-shaped parts on both sides of the lifting plate (26) cooperate with the dovetail grooves on the inner walls of the concave plate (21), the sliding of the lifting plate (26) is stable and the direction is fixed.

[0063] With the sliding of the lifting plate (26), the two groups of mirror image inclined grooves (27) on its surface also move. The sliding convex shaft (28) on the top of each set of hole plate (23) close to the mirror image inclined groove (27) is inserted into the corresponding through groove. Because the mirror image inclined groove (27) is composed of an even number of inclined through grooves, when the lifting plate (26) moves, the inclination angle of the through groove will force the sliding convex shaft (28) to displace along the direction of the groove. Because the outer diameter of the circular limiting part at the end of the sliding convex shaft (28) is larger than the outer diameter of the sliding convex shaft (28) itself, the sliding convex shaft (28) can only slide along the track of the through groove, and cannot displace radially, ensuring the stability and accuracy of the movement.

[0064] In this way, the sliding convex shaft (28) on the adjacent set of hole plate (23) drives the set of hole plate (23) to move horizontally along the array rod (22) under the action of the mirror image inclined groove (27), thereby realizing the adaptive adjustment of the distance between the clamping structures (24) on the adjacent two set of hole plates (23). After adjustment, different width sizes of aluminum alloy plates can be stably clamped by the clamping structure (24), and the first hydraulic cylinder (11) and the second hydraulic cylinder (12) are used for stretching operation. The whole process is convenient to operate and can quickly adapt to the stretching needs of various specifications of plates.

[0065] Example three:

[0066] As Figure 1 , Figures 9 to 12As shown in the drawing, the aluminum alloy plate stretching device further comprises a pushing mechanism arranged on the stretching table (1), which comprises two support plates (32) symmetrically fixed on the stretching table (1), a screw rod (33) rotatably connected to each of the two support plates (32), and a nut sleeve block (34) threadedly sleeved on the screw rod (33) to form a ball screw structure between the nut sleeve block (34) and the screw rod (33) to ensure smoothness and stability of transmission. The bottom of the nut sleeve block (34) is slidably arranged in a horizontal slot on the support plate (32) through a sliding protrusion, the top of the nut sleeve block (34) is fixedly provided with an L-shaped plate (341), the top of the L-shaped plate (341) has a horizontal surface, and the side of the horizontal surface away from the support plate (32) is provided with a rectangular protrusion. In a specific implementation, the L-shaped plate (341) is made of a high-temperature-resistant metal material, such as steel. When in use, the aluminum alloy plate horizontally contacts the horizontal surface, and the side end surface contacts the inner side surface of the rectangular protrusion. The L-shaped plate (341) is located on both sides of the supporting shaft (31), and functions to avoid movement interference with the supporting shaft (31) when the L-shaped plate (341) translates. The end portions of the two screw rods (33) are drivingly connected with a synchronous component (35), the synchronous component (35) is a chain transmission or a belt wheel transmission, and the side of the synchronous component (35) away from the screw rod (33) is provided with a pin shaft (36) connected with the shaft of an external driving motor to realize rotation power transmission. Note that the driving motor is not shown in the drawing for the convenience of structure display, but should be understood as a technical scope of those skilled in the art. In the embodiment, the synchronous component (35) is only shown as a belt wheel transmission, which specifically comprises synchronous wheels fixed on the end portions of the two screw rods (33) and a synchronous belt drivingly connected between the two synchronous wheels, wherein the pin shaft (36) is fixedly connected to the center of one of the synchronous wheels.

[0067] Further, a plurality of supporting shafts (31) are rotatably arranged on the top of the stretching table (1) between the two concave plates (21), the plurality of supporting shafts (31) are horizontally and equidistantly arranged, and the top surfaces of the supporting shafts (31) are on the same horizontal line as the top surfaces of the underlying jaw plates (245), so that when the aluminum alloy plate horizontally contacts the top of each supporting shaft (31), the bottom of the aluminum alloy plate is supported by the supporting shafts (31) with a spacing, and the bottom of the two sides of the aluminum alloy plate is in contact with the top surfaces of the underlying jaw plates (245).

[0068] Further, a rotating rod (37) is rotatably connected to one side of the top of the stretching table (1) close to the pin shaft (36), and a cotton sleeve (371) is sleeved on the outside of the rotating rod (37). When the aluminum alloy plate is horizontally placed on the top surface of the L-shaped plate (341), the top surface of the aluminum alloy plate is in contact with the bottom of the cotton sleeve (371).

[0069] In use: in order to facilitate the aluminum alloy plate to be transferred to the stretching processing area, and can be accurately matched with the clamping structure (24).

[0070] Before the aluminum alloy plate is stretched, the external transfer hoisting device horizontally places the aluminum alloy plate on the two L-shaped plates (341). Then, the external driving motor is started to drive the pin shaft (36) to rotate. Through the synchronous component (35), the rotary power can be synchronously transmitted to the two lead screws (33), so that the two lead screws (33) rotate at the same speed and direction. When the lead screw (33) rotates, the nut sleeve block (34) connected with the lead screw (33) by threads slides smoothly along the horizontal groove on the support plate (32) under the drive of the lead screw (33). The L-shaped plate (341) at the top of the nut sleeve block (34) translates, and the horizontal surface at the top of the L-shaped plate (341) is used to carry the aluminum alloy plate. One side end surface of the plate is in contact with the inner side surface of the rectangular protrusion, so as to realize the pushing of the plate.

[0071] During the pushing process, the several supporting shafts (31) rotatably arranged at the top of the stretching platform (1) play a supporting role. The top surface of the supporting shaft (31) is in the same horizontal line with the top surface of the lower jaw plate (245). The bottom of the aluminum alloy plate is in contact with the top of the supporting shaft (31) to form a spaced support at the bottom of the plate. At the same time, the bottom of the plate on both sides is in contact with the top surface of the lower jaw plate (245) to ensure the stability of the plate during the pushing process.

[0072] During the pushing process of the aluminum alloy plate, the top surface of the aluminum alloy plate is in contact with the bottom of the cotton sleeve (371). With the pushing of the L-shaped plate (341), the cotton sleeve (371) generates a friction force with the top surface of the plate to drive the rotating rod (37) to rotate. The cotton sleeve (371) is used to adsorb and remove impurities attached to the surface of the aluminum alloy plate.

[0073] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features. These modifications or replacements will not change the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application. In this application, the lubrication between the moving parts such as rotation, sliding, engagement and belt transmission is good, and it is not easy to slip or wear. In addition, the external parts are provided with corresponding protective shells. However, in the drawings of the present application, the connection state of the moving parts is not shown in order to clearly show the connection state of the moving parts. In addition, it can be understood that the parts in the present application are made of metal or plastic materials with suitable strength in the field to ensure that the structural rigidity meets the actual needs.

Claims

1. An aluminum alloy sheet drawing device, comprising a drawing table (1), and a first hydraulic cylinder (11) and a second hydraulic cylinder (12) symmetrically arranged on both sides of the top surface of the drawing table (1), a main controller (13) being installed on one side of the top of the drawing table (1), characterized in that, A linear positioning mechanism is arranged between the piston rods of the first hydraulic cylinder (11) and the second hydraulic cylinder (12); It comprises a positioning structure and an adjusting structure; The positioning structure comprises concave plates (21) fixedly connected to the end portions of the piston rods of the first hydraulic cylinder (11) and the second hydraulic cylinder (12), respectively, and two concave plates (21) are arranged, and the side of each of the two concave plates (21) close to each other is provided with an array rod (22), and an even number of hole setting plates (23) are slidably arranged on the array rod (22) and are equidistantly distributed in the horizontal direction. Each hole setting plate (23) is fixedly provided with a clamping structure (24) on the side away from the concave plate (21). The positioning plate (241) is fixedly connected to the side of each hole setting plate (23) away from the concave plate (21), a small hydraulic cylinder (242) is fixedly installed at the middle portion of the positioning plate (241), a pressing block (243) is fixedly connected to the end portion of the piston rod of the small hydraulic cylinder (242), two inclined blocks (244) are slidably arranged on the side of the positioning plate (241) away from the hole setting plate (23) in an up-down symmetrical manner, the side of the pressing block (243) away from the small hydraulic cylinder (242) is slidably arranged on the inclined surface of the inclined block (244), and the side of each of the two inclined blocks (244) away from the pressing block (243) is detachably connected with a jaw plate (245). The adjusting structure is used for adjusting the distance between the clamping structures (24) on the adjacent two hole setting plates (23). The adjusting structure comprises a servo cylinder (25) fixedly installed on the side of each of the two concave plates (21) away from each other, and a lifting plate (26) is slidably arranged on the side of each of the two concave plates (21) close to each other, the surface of the lifting plate (26) is provided with two groups of mirror image inclined grooves (27), the two groups of mirror image inclined grooves (27) are symmetrically arranged left and right with the central axis of the lifting plate (26) as the reference, and each group of mirror image inclined grooves (27) comprises an even number of inclined through grooves, and the top of each hole setting plate (23) close to the mirror image inclined groove (27) is provided with a sliding convex shaft (28), and the sliding convex shaft (28) is slidably arranged in the corresponding through groove.

2. The aluminum alloy sheet stretch reducing device of claim 1 wherein, The array rod (22) is composed of a plurality of cylindrical rods equidistantly distributed in the vertical direction, each hole setting plate (23) is provided with a circular hole corresponding to each array rod (22), and each hole setting plate (23) is slidably arranged on the corresponding cylindrical rod through the corresponding circular hole.

3. The aluminum alloy sheet stretch reducing device of claim 1 wherein, The side of the positioning plate (241) away from the hole setting plate (23) is provided with a T-shaped open groove, the two inclined blocks (244) are slidably connected in the T-shaped open groove through the T-shaped portion at the end thereof, the inclined surface of each of the two inclined blocks (244) is provided with an inner recessed clamping groove, and the upper and lower surfaces of the pressing block (243) are provided with protruding blocks slidably arranged in the clamping groove.

4. The aluminum alloy sheet stretch reducing device of claim 1 wherein, The bottom sides of the two concave plates (21) are fixedly provided with sliding blocks (2101), and the top of the stage (1) is fixedly provided with a sliding rail (2102), and the sliding blocks (2101) and the sliding rail (2102) are in sliding cooperation.

5. The aluminum alloy sheet stretch reducing device of claim 1 wherein, The lifting plate (26) is provided with dovetail-shaped parts on both sides, which slide in the dovetail grooves in the inner walls of the two sides of the concave plate (21).

6. The aluminum alloy sheet stretch reducing device of claim 1 wherein, The end of the sliding convex shaft (28) provided with a circular limiting part in the through groove has an outer diameter larger than that of the sliding convex shaft (28).

7. The aluminum alloy sheet stretch reducing device of claim 1 wherein, The push mechanism is arranged on the pulling and spreading table (1), and includes two support plates (32) symmetrically and fixedly arranged on the pulling and spreading table (1), and a screw rod (33) rotatably connected to each of the two support plates (32). A nut sleeve block (34) is threadedly sleeved on the screw rod (33), and the bottom of the nut sleeve block (34) is slidably arranged in a horizontal groove on the support plate (32) through a sliding convex part. The top of the nut sleeve block (34) is fixedly provided with an L-shaped plate (341), the top of the L-shaped plate (341) has a horizontal surface, and the side of the horizontal surface away from the support plate (32) is provided with a rectangular protrusion. The L-shaped plate (341) is located on both sides of the supporting shaft (31), and a synchronous component (35) is transmissionally connected between the ends of the two screw rods (33). The synchronous component (35) is chain transmission or belt wheel transmission, and the side of the synchronous component (35) away from the screw rod (33) is provided with a pin shaft (36) connected with the shaft of an external driving motor to realize rotation power transmission.

8. The aluminum alloy sheet stretch reducing device of claim 7 wherein, A plurality of supporting shafts (31) are rotationally arranged on the top of the pulling and spreading table (1) and between the two concave plates (21). The supporting shafts (31) are arranged horizontally and equidistantly, and the top surface of each supporting shaft (31) is on the same horizontal line as the top surface of the lower jaw plate (245).

9. The aluminum alloy sheet stretch-flanging device according to claim 7 or 8, characterized in that, A rotating rod (37) is rotationally connected to the side of the top of the pulling and spreading table (1) close to the pin shaft (36), and a cotton sleeve (371) is sleeved on the outside of the rotating rod (37). When the aluminum alloy plate is horizontally placed on the top surface of the L-shaped plate (341), the top surface of the aluminum alloy plate is in contact with the bottom of the cotton sleeve (371).

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