Tension stretching production line for aerospace-grade aluminum alloy sheet

Abstract

A tension stretching production line for an aerospace-grade aluminum alloy sheet. The tension stretching production line comprises a fixed head assembly (1), a stretching head assembly (2), a pressure-bearing beam (3), a pressure-bearing beam support (4), a stretching hydraulic cylinder (5), a stretching head buffer cylinder (6), a pressure-bearing beam buffer cylinder (7), an intermediate trolley (8), and a track (12). The fixed head assembly and the stretching head assembly are both of a split structure composed of upper and lower beams, the upper and lower beams being fixedly connected via pre-tensioning screws (1.5) and pre-tensioning nuts (1.6); a through-slot penetrates the middle portion of the upper and lower beams; and vertically symmetrically inclined clamping jaw devices are provided within the penetrating through-slot, each clamping jaw device comprising a jaw set (1.8) and a jaw drive device (1.9). The fixed head assembly and the stretching head assembly are both of a split structure composed of upper and lower beams, thereby reducing the weight of the fixed head assembly and the stretching head assembly, reducing the cost of the tension stretching production line for an aerospace-grade aluminum alloy sheet, and also mitigating the problem of the difficulty in maintaining jaw sets and jaw drive devices.

Description

An aerospace-grade aluminum alloy sheet tension stretching production line Technical Field

[0001] This invention relates to stress treatment equipment for aerospace-grade aluminum alloy sheets, specifically to a tension stretching production line for aerospace-grade aluminum alloy sheets. Background Technology

[0002] Thick aluminum alloy plates generate significant residual stress during rolling, quenching, and other production processes. Excessive residual stress can lead to deformation or even scrapping of the material during processing. Aerospace-grade aluminum alloy plates require a pre-stretching process to reduce residual stress during production, and a tension stretching machine is a crucial piece of equipment for this process.

[0003] The existing tension stretching machine uses an integral C-shaped plate beam for both the fixed head and the stretching head. This structure is simple and mature, and is the most common structural form used in domestic medium and low tonnage tension stretching machines. However, as the tonnage of tension stretching machines increases, the size of the integral C-shaped plate beam is becoming larger and larger. Due to limitations in forging or casting manufacturing capabilities, the excessive size of the C-shaped plate beam poses challenges to its processing and manufacturing. In addition, during use, if the crescent plate, jaw slider, or jaw tooth plate of the integral C-shaped plate beam assembly wears down and needs to be repaired or replaced, it can only be removed from the side. However, the crescent plate, jaw slider, and jaw tooth plate are relatively wide, and side removal requires a large maintenance space, which increases the equipment's footprint, increases the investment in equipment construction, and also increases the difficulty of repairing and replacing the crescent plate, jaw slider, and jaw tooth plate.

[0004] In the papers "Structural Strength Analysis and Optimization of a 10,000-Ton Aviation Tension Stretching Machine" and "Equipment for a 12,000-Ton Aviation-Grade Aluminum Alloy Plate Tension Stretching Machine," both proposed structural design optimization schemes based on the structure of the 10,000-ton aviation tension stretching machine of China Heavy Machinery Research Institute Co., Ltd. The proposed schemes involved a combined fixed-head and stretching-head design, where both the fixed-head and stretching-head consisted of a top beam, upper crossbeam, lower crossbeam, and bottom beam. These beams were fixedly connected using pre-tightened bolts and nuts to form either a fixed-head or stretching-head structure. This solved the manufacturing problem of the C-shaped plate beam in the overall structure and reduced the weight of the fixed-head and stretching-head without affecting the working performance of the tension stretching machine. However, in the combined fixed-head and stretching-head structural design schemes of the two papers, the fixed-head and stretching-head remained within the basic framework of four parts: a top beam, upper crossbeam, lower crossbeam, and bottom beam. Therefore, the structural design optimization effect was limited, and the weight of the optimized fixed-head and stretching-head remained relatively high.

[0005] In addition, the papers "Structural Strength Analysis and Optimization of a 10,000-ton Aviation Tension Stretching Machine" and "Equipment for a 12,000-ton Aviation-grade Aluminum Alloy Plate Tension Stretching Machine" are both based on the structural design of a 10,000-ton aviation tension stretching machine from China Heavy Machinery Research Institute Co., Ltd. The technical solution of a patent application document from China Heavy Machinery Research Institute Co., Ltd., entitled "A Pre-jaw Drive Device" (application number 201320570861.4), shows that its drive plate movement uses a sequential drive method of synchronous hydraulic cylinders and secondary clamping cylinders. This drive method is verified from the on-site physical diagrams of the tension stretching machine unit in both papers, showing two hydraulic cylinders (i.e., synchronous hydraulic cylinders) located on the right side of the stretching head. However, the sequential drive method of synchronous hydraulic cylinders and secondary clamping cylinders for the jaw plate has two problems: 1. During the drive plate movement, the push rod moves horizontally, while the clamping body moves obliquely. Therefore, there is relative sliding friction between the push rod and the clamping body contact surface. The force exerted by the push rod to push the clamping body is very large, resulting in severe wear between the push rod and the clamping body contact surface, thus shortening the push plate movement time. 1. Increased service life of the push rod and clamp body leads to higher replacement and maintenance frequency, increasing the operating and maintenance costs of the tension stretching machine. 2. With the toothed plate using a synchronous hydraulic cylinder and secondary clamping cylinder sequential drive structure, the slots on the fixed head and stretching head used to clamp the aluminum alloy plate are non-through structures. This results in the tension stretching machine only being able to use a discontinuous production process. That is, the aluminum alloy plate to be stretched needs to be hoisted between the fixed head and stretching head by an overhead crane. Then, the stretching head and fixed head clamp one end of the aluminum alloy plate, the stretching hydraulic cylinder applies tension, and after the stress on the aluminum alloy plate is eliminated, the stretching head and fixed head are released, and the stretched aluminum alloy plate is hoisted away by an overhead crane before the next aluminum alloy plate can be processed. The above-mentioned discontinuous production process of the tension stretching machine leads to low production efficiency. As a major engineering equipment, the tension stretching machine has a high investment cost. The contradiction between the high equipment investment cost and the low production efficiency seriously affects the economic benefits of the production enterprise, and therefore urgently needs to be improved. Summary of the Invention

[0006] To overcome the shortcomings in the prior art, this invention discloses an aerospace-grade aluminum alloy sheet tension stretching production line. By improving the structural design of the fixed head assembly and the stretching head assembly, it solves many problems of existing aluminum alloy sheet tension stretching machines, such as large weight, high cost, difficult maintenance, frequent maintenance, and low production efficiency, thereby improving the economic benefits of production enterprises.

[0007] To achieve the aforementioned objective, the present invention employs the following technical solution: an aerospace-grade aluminum alloy sheet tension stretching production line for stretching aerospace-grade aluminum alloy sheets to eliminate residual stress in the aluminum alloy sheets; comprising a fixed head assembly, a stretching head assembly, a pressure beam, a pressure beam support, a stretching hydraulic cylinder, a stretching head buffer cylinder, a pressure beam buffer cylinder, an intermediate trolley, and a track; wherein the fixed head assembly and the stretching head assembly are used to clamp the aluminum alloy sheets and perform stretching treatment on them; wherein the pressure beam is used to bear the pressure of the fixed head assembly and the stretching head assembly during operation. The components include: a pressure beam support for sliding support of the pressure beam; a tension hydraulic cylinder for providing tension to the fixed head assembly and the tension head assembly; a tension head buffer cylinder for buffering the tension head assembly in case of band breakage during operation; a pressure beam buffer cylinder for buffering the pressure beam in case of band breakage during operation; an intermediate trolley for supporting the aluminum alloy sheet and providing deformation correction power; and a track for moving the fixed head assembly, the tension head assembly, and the intermediate trolley.

[0008] Both the fixed head assembly and the tension head assembly adopt a split upper and lower beam structure, and the upper and lower beams are fixedly connected by a pre-tightening screw and a pre-tightening nut; a through groove is provided in the middle of the upper and lower beams; clamping jaw devices are symmetrically and inclinedly arranged in the through groove, and the clamping jaw devices include jaw assembly and jaw drive device.

[0009] Preferably, a feeding roller conveyor is also movably provided on the outer side of the fixed head assembly; and a discharge roller conveyor is also fixedly provided on the outer side of the stretching head assembly.

[0010] Furthermore, the bearing beam support is fixedly installed on the ground; the bearing beam is slidably installed on the bearing beam support, with one end fixedly connected to the bearing beam buffer cylinder and the other end fixedly connected to the tension hydraulic cylinder; the bearing beam buffer cylinder is fixedly connected to the ground through a bracket; the tension hydraulic cylinder is slidably connected to a bracket, which is fixedly installed on the ground.

[0011] Furthermore, the fixed head assembly includes a fixed head upper beam and a fixed head lower beam, which are fixedly connected by pre-tightening screws and pre-tightening nuts; a traveling device A is provided at the lower part of the fixed head lower beam, which is mounted on a track; a fixed head upper beam stop plate and a fixed head lower beam stop plate are respectively provided on both sides of the fixed head upper beam and the fixed head lower beam, forming a pressure beam groove between them, and a pressure beam is provided between the pressure beam groove, with fixing pin holes evenly distributed on the pressure beam; a fixing pin device is fixedly provided at the upper part of the fixed head upper beam stop plate, and a fixing pin is movably provided in the fixing pin device; when the fixed head assembly is working, the fixing pin in the fixing pin device falls down and inserts into the fixing pin hole on the pressure beam, so that the fixed head assembly is fixed in position.

[0012] Furthermore, the tensioning hydraulic cylinder includes a main working cylinder liner, a cylinder head, a main working cylinder plunger, a rapid traverse cylinder liner, and a piston rod. A support is provided at the lower part of the main working cylinder liner, which is fixedly mounted on the ground. The main working cylinder liner is slidably mounted on the support. The cylinder head is fixedly mounted at one end of the main working cylinder liner. The main working cylinder plunger is movably mounted within the main working cylinder liner, the rapid traverse cylinder liner is movably mounted within the main working cylinder plunger, and the piston rod is movably mounted within the rapid traverse cylinder liner. One end of the piston rod is fixedly connected to the cylinder head, and the other end is connected to a tensioning head buffer cylinder, which is fixedly mounted on the ground via the support. The cylinder head of the tensioning hydraulic cylinder is fixedly connected to one end of a pressure-bearing beam.

[0013] Furthermore, the stretching head assembly includes a stretching head upper beam and a stretching head lower beam, which are fixedly connected by a pre-tightening screw and a pre-tightening nut; a traveling device B is provided at the lower part of the stretching head lower beam, which is mounted on a track; a stretching head upper fixing sleeve and a stretching head lower beam fixing sleeve are respectively provided on both sides of the stretching head upper beam and the stretching head lower beam; the stretching head upper fixing sleeve and the stretching head lower beam fixing sleeve are fixedly connected to the rapid movement cylinder sleeve of the stretching hydraulic cylinder.

[0014] Furthermore, a through-type fixed head material passage is provided between the upper fixed head beam and the lower fixed head beam; jaw assemblies and jaw driving devices are symmetrically arranged on the upper fixed head beam and the lower fixed head beam; the jaw assembly is provided with several jaw plates for clamping aluminum alloy plates; the jaw driving device is provided with several clamping cylinders to provide clamping force to the jaw plates.

[0015] A through-feed groove for the stretching head is provided between the upper and lower beams of the stretching head; jaw assemblies and jaw drive devices are symmetrically arranged on the upper and lower beams of the stretching head; the jaw assembly is provided with several jaw plates for clamping aluminum alloy sheets; the jaw drive device is provided with several clamping cylinders to provide clamping force to the jaw plates.

[0016] Furthermore, the jaw assembly includes a jaw base plate, a jaw guide rail, a jaw slider, a jaw jaw plate, and jaw jaw plate wedges. The jaw guide rail is elastically connected to the jaw base plate, the jaw slider is movably connected to the jaw guide rail, and the jaw jaw plate is fixedly connected to the jaw slider via jaw jaw plate wedges. The jaw assembly is symmetrically and fixedly arranged on the upper and lower sides of the feed groove of the fixed head or the feed groove of the stretching head via the jaw base plate. The jaw slider moves along the inclined jaw guide rail, causing the jaw jaw plate to move up and down, clamping or releasing the aluminum alloy sheet.

[0017] Furthermore, the jaw drive device includes a jaw drive device base, a clamping cylinder, and an unloading cylinder, which are fixedly mounted on the jaw drive device base. A clamping cylinder push rod is movably mounted at one end of the clamping cylinder, separate from the jaw slider. An unloading cylinder pull rod is movably mounted at one end of the unloading cylinder, and the unloading cylinder pull rod is connected to the jaw slider via an unloading wire rope. The jaw drive device is symmetrically and fixedly mounted on the upper and lower sides of the fixed head feed groove or the stretching head feed groove via the jaw drive device base. When the clamping cylinder push rod extends outward, it pushes the jaw slider along the jaw guide rail, causing the upper and lower jaw plates to move closer together, clamping the aluminum alloy sheet. When the unloading cylinder pull rod retracts inward, it pulls the jaw slider along the jaw guide rail via the unloading wire rope, causing the upper and lower jaw plates to move away from each other, releasing the aluminum alloy sheet.

[0018] Furthermore, organic front devices are provided on opposite sides of both the fixed head lower beam and the tension head lower beam.

[0019] Due to the adoption of the above-described technical solution, the present invention has the following beneficial effects: The aerospace-grade aluminum alloy sheet tension stretching production line disclosed in this invention adopts an upper and lower beam combination structure for both the fixed head assembly and the stretching head assembly, which greatly reduces the weight of the fixed head assembly and the stretching head assembly, reduces the cost of the aluminum alloy sheet tension stretching production line, and improves the maintenance difficulties of the jaw assembly and jaw drive device. The jaw assembly and jaw drive device are independently and symmetrically arranged on the upper and lower beams, eliminating the friction between the clamping cylinder top rod and the jaw slider contact surface, and extending the service life of the jaw assembly and jaw drive device. At the same time, the jaw assembly and jaw drive device independently arranged on the upper and lower beams form a through-flow groove on the fixed head assembly and the stretching head assembly. When the aluminum alloy sheet is stretched, it can enter from the outside of the fixed head assembly and the stretching head assembly for stretching. The stretched aluminum alloy sheet flows out from one side of the stretching head assembly, thus forming a continuous production line process, which greatly improves the production efficiency of aluminum alloy sheet tension stretching, solves the contradiction between high equipment investment and low production efficiency, and greatly improves the economic benefits of the production enterprise. Attached Figure Description

[0020] Figure 1 is a horizontal view of the tension stretching production line for aerospace-grade aluminum alloy sheets in Example 1.

[0021] Figure 2 is a top view of the aerospace-grade aluminum alloy sheet tension stretching production line of Example 1;

[0022] Figure 3 is a side view of the tension stretching production line for aerospace-grade aluminum alloy sheets in Example 1;

[0023] Figure 4 is a schematic diagram of the fixed head assembly;

[0024] Figure 5 is a cross-sectional view of the fixed head assembly structure;

[0025] Figure 6 is a schematic diagram of the jaw assembly.

[0026] Figure 7 is a schematic diagram of the jaw assembly (II).

[0027] Figure 8 is a schematic diagram of the jaw drive device.

[0028] Figure 9 is a schematic diagram of the appearance of the fixing pin device;

[0029] Figure 10 is a cross-sectional view of the tension hydraulic cylinder structure;

[0030] Figure 11 is a schematic diagram of the appearance of the stretching head assembly;

[0031] Figure 12 is a cross-sectional view of the tension head assembly;

[0032] Figure 13 is a cross-sectional view of the assembly structure of the clamping jaw device;

[0033] Figure 14 is a horizontal view of the tension stretching production line for aerospace-grade aluminum alloy sheets in Example 2.

[0034] In the diagram: 1. Fixed head assembly; 1.1. Fixed head upper beam; 1.1.1. Fixed head upper beam stop plate; 1.2. Fixed head lower beam; 1.2.1. Fixed head lower beam stop plate; 1.3. Fixed head material passage groove; 1.4. Fixed pin device; 1.4.1. Fixed pin; 1.5. Preload screw; 1.6. Preload nut; 1.7. Traveling device A; 1.8. Jaw assembly; 1.8.1. Jaw base plate; 1.8.2. Jaw guide rail; 1.8.3. Jaw slider; 1.8.4. Jaw jaw plate; 1.8.5. Jaw jaw plate wedge; 1.9. Jaw drive device; 1.9.1. Jaw drive device base; 1.9.2. Clamping cylinder; 1.9.2.1. Clamping cylinder push rod; 1.9.3. Unloading cylinder; 1.9.3.1. Unloading cylinder pull rod; 1.9.3.2 1. Unloading wire rope; 1.10. Pressure beam groove; 2. Tensioning head assembly; 2.1. Tensioning head upper beam; 2.1.1. Tensioning head upper beam fixing sleeve; 2.2. Tensioning head lower beam; 2.2.1. Tensioning head lower beam fixing sleeve; 2.3. Tensioning head material passage groove; 2.7. Traveling device B; 3. Pressure beam; 3.1. Fixing pin hole; 4. Pressure beam support; 4.1. Pressure beam fixing seat; 4.2. Pressure beam slide; 5. Tensioning hydraulic cylinder; 5.1. Main working cylinder sleeve; 5.2. Cylinder head; 5.3. Main working cylinder plunger; 5.4. Rapid moving cylinder sleeve; 5.5. Piston rod; 5.6. Flange connector; 6. Tensioning head buffer cylinder; 7. Pressure beam buffer cylinder; 8. Intermediate trolley; 9. Feeding roller conveyor; 10. Discharge roller conveyor; 11. Aluminum alloy plate; 12. Track; 13. Front device. Detailed Implementation

[0035] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0036] Example 1, see Figures 1 and 2 in the instruction manual:

[0037] An aerospace-grade aluminum alloy sheet tension stretching production line includes a fixed head assembly 1, a stretching head assembly 2, a pressure beam 3, a pressure beam support 4, a stretching hydraulic cylinder 5, a stretching head buffer cylinder 6, a pressure beam buffer cylinder 7, an intermediate trolley 8, and a track 12 (the intermediate trolley 8 and track 12 are not shown in Figure 2 of the specification). The track 12 is fixedly installed on the ground.

[0038] Referring to Figure 3 in the instruction manual: The pressure beam support 4 includes a pressure beam fixing seat 4.1 and a pressure beam sliding seat 4.2. The pressure beam fixing seat 4.1 is fixedly installed on the ground, and the pressure beam sliding seat 4.2 is fixedly installed on the outer side of the pressure beam 3. The pressure beam sliding seat 4.2 is slidably installed on the pressure beam fixing seat 4.1. Referring to Figure 1 in the instruction manual, the left end of the pressure beam 3 is fixedly connected to the pressure beam buffer cylinder 7, and the right end is fixedly connected to the main working cylinder sleeve 5.1 of the tension hydraulic cylinder 5. The pressure beam buffer cylinder 7 is fixedly connected to the ground, and the main working cylinder sleeve 5.1 of the tension hydraulic cylinder 5 is slidably installed on the tension hydraulic cylinder bracket, which is fixedly connected to the ground. Fixing pin holes 3.1 are evenly distributed on the pressure beam 3.

[0039] Referring to Figure 4 in the instruction manual: The fixed head assembly 1 includes a fixed head upper beam 1.1 and a fixed head lower beam 1.2, which are fixedly connected by a pre-tightening screw 1.5 and a pre-tightening nut 1.6. A traveling device A1.7 is provided at the lower part of the fixed head lower beam 1.2, which is mounted on the track 12 and drives the fixed head assembly 1 to travel along the track. Fixed head upper beam 1.1 and fixed head lower beam 1.2 are respectively provided on both sides of the fixed head upper beam 1.1 and the fixed head lower beam 1.2. A pressure-bearing beam groove 1.10 is formed between the fixed head lower beam stop plate 1.2.1, and the pressure-bearing beam 3 is set in the pressure beam groove 1.10; a fixing pin device 1.4 (see Figure 9 in the instruction manual) is fixedly installed on the upper part of the fixed head upper beam stop plate 1.1.1, and a fixing pin 1.4.1 is movably installed in the fixing pin device 1.4; when the fixed head assembly 1 is working, the fixed head assembly 1 is driven to move horizontally on the track 12 by the traveling device A1.7. When it moves into place, the fixing pin 1.4.1 in the fixing pin device 1.4 falls down and inserts into the fixing pin hole 3.1 on the pressure-bearing beam 3, so that the fixed head assembly 1 remains fixed in position;

[0040] Referring to Figure 10 in the instruction manual: The tensioning hydraulic cylinder 5 includes a main working cylinder sleeve 5.1, a cylinder head 5.2, a main working cylinder plunger 5.3, a rapid traversing cylinder sleeve 5.4, and a piston rod 5.5. A main working cylinder sleeve bracket is provided at the lower part of the main working cylinder sleeve 5.1, and the main working cylinder sleeve bracket is fixedly installed on the ground. The main working cylinder sleeve 5.1 is slidably installed on the upper part of the bracket. The cylinder head 5.2 is fixedly installed at one end of the main working cylinder sleeve 5.1. The main working cylinder plunger 5.3 is movably installed in the main working cylinder sleeve 5.1. The rapid traversing cylinder sleeve 5.4 is movably installed in the main working cylinder plunger 5.3. The piston rod 5.5 is movably installed in the rapid traversing cylinder sleeve 5.4. The left end of the piston rod 5.5 is fixedly connected to the cylinder head 5.2, and the right end is provided with a tensioning head buffer cylinder 6, which is fixedly installed on the ground by a bracket. The cylinder head 5.2 of the tensioning hydraulic cylinder 5 is fixedly connected to the right end of the pressure beam 3 through a flange connector 5.6.

[0041] Referring to Figure 11 in the instruction manual, the stretching head assembly 2 includes a stretching head upper beam 2.1 and a stretching head lower beam 2.2, which are fixedly connected by a pre-tightening screw 1.5 and a pre-tightening nut 1.6. A traveling device B2.7 is provided at the lower part of the stretching head lower beam 2.2, and the traveling device B2.7 is mounted on the track 12. A stretching head upper beam fixing sleeve 2.1.1 and a stretching head lower beam fixing sleeve 2.2.1 are respectively provided on both sides of the stretching head upper beam 2.1 and the stretching head lower beam 2.2.1. Referring to Figure 2 in the instruction manual, the stretching head upper beam fixing sleeve 2.1.1 and the stretching head lower beam fixing sleeve 2.2.1 are fixedly connected to the rapid movement cylinder sleeve 5.4 of the stretching hydraulic cylinder 5.

[0042] In the aforementioned structures of fixed head assembly 1 and tension head assembly 2, the top beam and upper crossbeam in "Structural Strength Analysis and Optimization of 10,000-ton Aviation Tension Stretching Machine" and "Equipment for 12,000-ton Aviation-grade Aluminum Alloy Plate Tension Stretching Machine" are replaced by fixed head upper beam 1.1 or tension head upper beam 2.1 (i.e., the top beam and upper crossbeam structures are combined into one), and the lower crossbeam and bottom beam are replaced by fixed head lower beam 1.2 or tension head lower beam 2.2 (i.e., the lower crossbeam and bottom beam structures are combined into one). The structural design of fixed head upper beam 1.1, tension head upper beam 2.1, fixed head lower beam 1.2, and tension head lower beam 2.2 is optimized. Under the premise of meeting the structural strength requirements of the tension stretching machine, the weight of fixed head assembly 1 and tension head assembly 2 is greatly reduced, thereby reducing the cost of the aluminum alloy plate tension stretching production line.

[0043] Referring to Figure 5 in the instruction manual, a through-type fixed head feed groove 1.3 is provided between the upper fixed head beam 1.1 and the lower fixed head beam 1.2; a jaw assembly 1.8 and a jaw drive device 1.9 are independently and symmetrically inclinedly arranged on the upper fixed head beam 1.1 and the lower fixed head beam 1.2; referring to Figures 6 and 7 in the instruction manual, the jaw assembly 1.8 includes a jaw base plate 1.8.1, a jaw guide rail 1.8.2, a jaw slider 1.8.3, a jaw jaw plate 1.8.4, and a jaw jaw plate wedge 1.8.5. The jaw guide rail 1.8.2 is elastically connected to the jaw base plate 1.8.1, the jaw slider 1.8.3 is movably connected to the jaw guide rail 1.8.2, and the jaw jaw plate 1.8.4 is connected to the jaw slider 1.8.5 via the jaw jaw plate wedge 1.8.5. 8.3 Fixed connection: The jaw wedge 1.8.5 and jaw slider 1.8.3 are fixedly connected by bolts; see Figure 13 in the instruction manual. The jaw assembly 1.8 is symmetrically and fixedly arranged on the upper and lower sides of the feed groove 1.3 of the fixed head via the jaw base plate 1.8.1, that is, the jaw assembly 1.8 is symmetrically and fixedly arranged on the lower part of the upper beam 1.1 of the fixed head and the upper right side of the lower beam 1.2 of the fixed head. The jaw guide rail 1.8.2 is inclined; the jaw slider 1.8.3 moves along the inclined jaw guide rail 1.8.2, driving the jaw plate 1.8.4 to move up and down, clamping or loosening the aluminum alloy plate 11; see Figure 8 in the instruction manual. The jaw driving device 1.9 includes a jaw driving device base 1.9.1, a clamping device base 1.9.1, a clamping device base 1.9.1, a clamping device base 1.9.1, a clamping device base 1.9.1, a clamping device base 1.9.2, a clamping device base 1.9.1, a clamping device base 1.9.2, a clamping device base 1.9.3 ... The clamping cylinder 1.9.2 and the unloading cylinder 1.9.3 are fixedly mounted on the jaw drive device base 1.9.1. A clamping cylinder push rod 1.9.2.1 is movably mounted at one end of the clamping cylinder 1.9.2. An unloading cylinder pull rod 1.9.3.1 is movably mounted at one end of the unloading cylinder 1.9.3.1, and an unloading wire rope 1.9.3.2 is fixedly connected to the end of the unloading cylinder pull rod 1.9.3.1. Referring to Figure 13 in the instruction manual, the jaw drive device 1.9 is symmetrically and fixedly mounted on the upper and lower sides of the fixed head feed groove 1.3 via the jaw drive device base 1.9.1, that is, the jaw drive device 1.9 is symmetrically and fixedly mounted on the lower part of the fixed head upper beam 1.1 and the upper left side of the fixed head lower beam 1.2. The clamping cylinder push rod 1.9.2.1 is separated from the jaw slider 1.8.3. The unloading cylinder pull rod 1.9.3.1 is connected to the jaw slider 1.8.3 via the unloading wire rope 1.9.3.2. When the clamping cylinder push rod 1.9.2.1 extends outward, it pushes the jaw slider 1.8.3 along the jaw guide rail 1.8.2 to the right in a diagonal motion, causing the upper and lower jaw plates 1.8.4 to move closer to each other and clamp the aluminum alloy plate 11. When the unloading cylinder pull rod 1.9.3.1 retracts inward, it pulls the jaw slider 1.8.3 along the jaw guide rail 1.8.2 to the left in a diagonal motion via the unloading wire rope 1.9.3.2, causing the upper and lower jaw plates 1.8.4 to move further apart and release the aluminum alloy plate 11.

[0044] Referring to Figures 11 and 12 in the instruction manual, a through-type stretching head feed groove 2.3 is provided between the upper beam 2.1 and the lower beam 2.2 of the stretching head; a jaw assembly 1.8 and a jaw driving device 1.9 are symmetrically arranged on the upper beam 2.1 and the lower beam 2.2 of the stretching head, and the connection structure between the jaw assembly 1.8, the jaw driving device 1.9 and the upper beam 2.1 and the lower beam 2.2 of the stretching head is the same as that of the aforementioned fixed head assembly 1;

[0045] The mounting structure of the jaw assembly 1.8 and jaw drive device 1.9 in the fixed head assembly 1 and the stretching head assembly 2 is open along the stretching direction of the aluminum alloy sheet 11, which facilitates the disassembly and maintenance of the jaw assembly 1.8 and jaw drive device 1.9. Taking the fixed head assembly 1 as an example, refer to Figure 5 in the instruction manual: When it is necessary to disassemble and maintain the jaw assembly 1.8 and jaw drive device 1.9, first disconnect the connection between the unloading wire rope 1.9.3.2 and the unloading cylinder pull rod 1.9.3.1 from the left side of the fixed head assembly 1. Then, remove the connecting bolts between the fixed jaw drive device base 1.9.1 and the fixed head upper beam 1.1 or the fixed head lower beam 1.2. The jaw drive device 1.9 can then be removed from the left side of the fixed head assembly 1. Next, remove the connecting bolts between the fixed jaw base plate 1.8.1 and the fixed head upper beam 1.1 or the fixed head lower beam 1.2. By connecting the bolts, the jaw assembly 1.8 can be removed from the left side of the fixed head assembly 1. Compared with the existing C-shaped plate beam fixed head and tension head with an integral structure, the above-mentioned method of disassembling and repairing the jaw assembly 1.8 and jaw drive device 1.9 does not require reserving maintenance space for removing the crescent plate, jaw slider, and jaw jaw plate from the side, thus reducing the equipment's footprint and lowering the project construction investment. In addition, the jaw drive device 1.9 of this application has an upper and lower split structure, which is lighter than the existing sequential drive structure using synchronous hydraulic cylinders and secondary clamping cylinders. This also improves the difficulty of repairing and replacing the jaw assembly 1.8 and jaw drive device 1.9. At the same time, the upper and lower split structure of the jaw drive device 1.9 also allows the fixed head material passage groove 1.3 of the fixed head assembly 1 and the tension head material passage groove 2.3 of the tension head assembly 2 to be completely penetrated.

[0046] Furthermore, the jaw drive device 1.9 is set in an inclined manner in the fixed head assembly 1 and the tension head assembly 2 in the same direction of movement as the jaw slider 1.8.3. Its inclination angle is the same as the direction of movement of the jaw slider 1.8.3. Therefore, when the clamping cylinder push rod 1.9.2.1 extends and abuts against the end face of the jaw slider 1.8.3, driving the jaw slider 1.8.3 to move along the jaw guide rail 1.8.2, no sliding friction will occur between the clamping cylinder push rod 1.9.2.1 and the jaw slider 1.8.3, thereby improving the service life of the clamping cylinder push rod 1.9.2.1 and the jaw slider 1.8.3 and reducing the maintenance frequency of the jaw assembly 1.8 and the jaw drive device 1.9.

[0047] Referring to Figure 1 in the instruction manual, a front device 13 is also provided on the opposite side of the lower beam 1.2 of the fixed head and the lower beam 2.2 of the stretching head. The upper part of the front device 13 is provided with lifting guide rollers and left and right centering devices. Several intermediate carriages 8 are provided and are located between the fixed head assembly 1 and the stretching head assembly 2. The bottom of the intermediate carriage 8 is provided with a traveling device, which drives the intermediate carriage 8 to travel on the track 12. The traveling device drives the intermediate carriage 8 to travel along the track 12. The upper part of the intermediate carriage 8 is provided with lifting guide rollers and left and right limiting devices. The lifting guide rollers of the front device 13 and the intermediate carriage 8 are covered with a polymer material to prevent scratches on the surface of the aluminum alloy plate 11.

[0048] The production process of the aerospace-grade aluminum alloy sheet tension stretching production line in this embodiment is as follows:

[0049] Referring to Figure 1 in the instruction manual: When the tension stretching production line is started, the fixed head assembly 1 is driven by the traveling device A1.7 to move horizontally along the track 12 to a suitable position according to the length of the aluminum alloy plate 11 to be produced. The fixed pin 1.4.1 in the fixed pin device 1.4 falls and inserts into the fixed pin hole 3.1 of the pressure beam 3, locking the position of the fixed head assembly 1. The clamping cylinder push rod 1.9.2.1 and the unloading cylinder pull rod 1.9.3.1 in the jaw drive device 1.9 retract, driving the jaw slider 1.8.3 to slide along the jaw guide rail 1.8.2 to the initial position, and the upper and lower jaw teeth 1.8.4 are at the maximum distance.

[0050] The stretching head assembly 2 is driven by the rapid movement cylinder sleeve 5.4 of the stretching hydraulic cylinder 5. The traveling device B2.7 moves horizontally along the track 12 to a suitable position. The clamping cylinder push rod 1.9.2.1 and the unloading cylinder pull rod 1.9.3.1 in the jaw drive device 1.9 retract, driving the jaw slider 1.8.3 to slide along the jaw guide rail 1.8.2 to the initial position, and the upper and lower jaw teeth plates 1.8.4 are at their maximum distance.

[0051] The intermediate trolley 8 is driven by the traveling device to move horizontally along the track 12 to a suitable position; the lifting guide rollers of the front device 13 and the intermediate trolley 8 are adjusted to a suitable height, and the left and right centering devices of the front device 13 and the left and right limiting devices of the intermediate trolley 8 are adjusted to a suitable opening.

[0052] The overhead crane lifts the aluminum alloy sheet 11 to be processed onto the front device 13 and the intermediate trolley 8; the left and right centering devices of the front device 13 and the left and right limiting devices of the intermediate trolley 8 are activated, driving the aluminum alloy sheet 11 to be adjusted to the center position on the front device 13 and the intermediate trolley 8; the lifting guide rollers of the front device 13 and the intermediate trolley 8 rotate, sending the left end of the aluminum alloy sheet 11 between the upper and lower sets of jaw plates 1, 8, and 4 of the fixed head assembly 1; several clamping cylinder top rods 1, 9, 2, and 1 on the fixed head assembly 1 extend synchronously (clamping cylinder top rods 1, 9, 2, and 1). The synchronous action of lever 1.9.2.1 is controlled by a servo hydraulic system, which pushes the jaw slider 1.8.3 to slide obliquely along the jaw guide rail 1.8.2. The upper and lower jaw plates 1.8.4 clamp the aluminum alloy plate 11. During the oblique movement of the jaw slider 1.8.3 by the clamping cylinder push rod 1.9.2.1, the unloading cylinder pull rod 1.9.3.1 is always subjected to a retraction force, that is, the unloading wire rope 1.9.3.2 connecting the unloading cylinder pull rod 1.9.3.1 and the jaw slider 1.8.3 is always under tension.

[0053] The stretching head assembly 2 is driven by the rapid-moving cylinder sleeve 5.4 of the stretching hydraulic cylinder 5, moving horizontally to the left along the track 12, so that the right end of the aluminum alloy sheet 11 enters between the upper and lower jaw plates 1.8.4 of the stretching head assembly 2; several clamping cylinder push rods 1.9.2.1 on the stretching head assembly 2 extend synchronously (the synchronous movement of the clamping cylinder push rods 1.9.2.1 is controlled by the servo hydraulic system), pushing the jaw slider 1.8.3 to slide obliquely along the jaw guide rail 1.8.2, and the upper and lower jaw plates 1.8.4 clamp the aluminum alloy sheet 11; during the process of the clamping cylinder push rods 1.9.2.1 pushing the jaw slider 1.8.3 to move obliquely, the unloading wire rope 1.9.3.2 always maintains tension;

[0054] The lifting guide rollers of the front device 13 and the middle trolley 8 descend and detach from the aluminum alloy plate 11; the left and right centering devices of the front device 13 and the left and right limiting devices of the middle trolley 8 are activated and detach from the aluminum alloy plate 11.

[0055] The main working cylinder plunger 5.3 of the stretching hydraulic cylinder 5 moves to the right, driving the stretching head assembly 2 to move to the right via the rapid traversing cylinder sleeve 5.4 (at this time, the hydraulic oil between the main working cylinder plunger 5.3 and the rapid traversing cylinder sleeve 5.4 is in a closed state), applying tension to the aluminum alloy plate 11 (at this time, the pressure beam 3 located between the fixed head assembly 1 and the stretching head assembly 2 is under pressure); during the application of tension to the aluminum alloy plate 11, the jaw plates 1.8.4 are embedded in the surface of the aluminum alloy plate 11, and as the tension applied to the aluminum alloy plate 11 increases, the clamping force of the upper and lower jaw plates 1.8.4 on the aluminum alloy plate 11 also increases synchronously; when the tension of the aluminum alloy plate 11 reaches the set value, the clamping cylinder top rod 1.9.2.1 retracts to its original position, and the clamping cylinder top rod 1.9.2.1 disengages from the jaw slider 1.8.3;

[0056] The tension is increased by the main working cylinder plunger 5.3 of the tension hydraulic cylinder 5 until the tension applied to the aluminum alloy plate 11 reaches the set value, and is maintained for a set time. Then the main working cylinder plunger 5.3 of the tension hydraulic cylinder 5 is slowly unloaded, and the stress relief of the aluminum alloy plate 11 ends.

[0057] The lifting guide rollers of the front device 13 and the intermediate trolley 8 rise and re-support the aluminum alloy plate 11. The upper and lower jaw plates 1.8.4 of the fixed head assembly 1 and the tension head assembly 2 separate under the tension of the unloading wire rope 1.9.3.2, releasing the clamping of the aluminum alloy plate 11.

[0058] The stretching head assembly 2 is driven by the rapid movement cylinder sleeve 5.4 of the stretching hydraulic cylinder 5, and moves horizontally to the right along the track 12, so that the right end of the aluminum alloy sheet 11 is separated from the upper and lower jaw plates 1.8.4 of the stretching head assembly 2; the lifting guide rollers of the front device 13 and the intermediate trolley 8 rotate, driving the aluminum alloy sheet 11 to move to the right, and the left end is separated from the upper and lower jaw plates 1.8.4 of the fixed head assembly 1; finally, the processed aluminum alloy sheet 11 is lifted off the front device 13 and the intermediate trolley 8 by the overhead crane.

[0059] Repeat the above process to perform tension stress relief on the next aluminum alloy sheet 11.

[0060] As can be seen from the production process of the aerospace-grade aluminum alloy sheet tension stretching production line in the above embodiment, its production process is a non-continuous production process, which requires two lifting operations of the aluminum alloy sheet 11. During the lifting operation of the aluminum alloy sheet 11 by the overhead crane, the aerospace-grade aluminum alloy sheet tension stretching production line is in standby mode. Therefore, the production efficiency is low, and there is a contradiction between high investment costs and low production efficiency, which seriously affects the economic benefits of the production enterprise.

[0061] Example 2, see Figure 14 in the instruction manual:

[0062] In this embodiment, a feeding roller conveyor 9 is movably arranged on the left side of the fixed head assembly 1, and a discharge roller conveyor 10 is fixedly arranged on the right side of the stretching head assembly 2; wherein a traveling device is provided at the lower part of the feeding roller conveyor 9, and the feeding roller conveyor 9 is movably arranged on the upper part of the track 12 through the traveling device, and the feeding roller conveyor 9 can move horizontally along the track 12 under the drive of the traveling device; lifting guide rollers and left and right limiting devices are provided on the upper part of the feeding roller conveyor 9 and the discharge roller conveyor 10.

[0063] The production process of the aerospace-grade aluminum alloy sheet tension stretching production line in this embodiment is as follows:

[0064] When the tension stretching production line starts, the fixed head assembly 1 is driven by the traveling device A1.7 to move horizontally along the track 12 to a suitable position according to the length of the aluminum alloy plate to be produced. The fixed pin 1.4.1 in the fixed pin device 1.4 falls and inserts into the fixed pin hole 3.1 of the pressure beam 3, locking the position of the fixed head assembly 1. The clamping cylinder push rod 1.9.2.1 and the unloading cylinder pull rod 1.9.3.1 in the jaw drive device 1.9 retract, driving the jaw slider 1.8.3 to slide along the jaw guide rail 1.8.2 to the initial position, and the upper and lower jaw teeth 1.8.4 are at the maximum distance.

[0065] The stretching head assembly 2 is driven by the rapid movement cylinder sleeve 5.4 of the stretching hydraulic cylinder 5. The traveling device B2.7 moves horizontally along the track 12 to a suitable position. The clamping cylinder push rod 1.9.2.1 and the unloading cylinder pull rod 1.9.3.1 in the jaw drive device 1.9 retract, driving the jaw slider 1.8.3 to slide along the jaw guide rail 1.8.2 to the initial position, and the upper and lower jaw teeth plates 1.8.4 are at their maximum distance.

[0066] The intermediate trolley 8 and the feeding roller conveyor 9 are driven by the traveling device to move horizontally along the track 12 to a suitable position; the lifting guide rollers of the front device 13, the intermediate trolley 8 and the feeding roller conveyor 9 are adjusted to a suitable height, and the left and right centering devices of the front device 13 and the left and right limiting devices of the intermediate trolley 8 and the feeding roller conveyor 9 are adjusted to a suitable opening.

[0067] The overhead crane lifts the aluminum alloy sheet 11 to be processed onto the feeding roller conveyor 9. The left and right limiting devices of the feeding roller conveyor 9 are activated, driving the aluminum alloy sheet 11 to be centered on the feeding roller conveyor 9. The lifting guide roller rotates, driving the aluminum alloy sheet 11 to move horizontally, passing through the fixed head feed groove 1.3 of the fixed head assembly 1, until both ends of the aluminum alloy sheet 11 are respectively located between the upper and lower sets of jaw plates 1.8.4 of the fixed head assembly 1 and the stretching head assembly 2. The left and right centering devices of the front device 13 and the left and right limiting devices of the intermediate carriage 8 are activated, driving the aluminum alloy sheet 11 to be centered on the front device 13 and the intermediate carriage 8.

[0068] First, the upper and lower jaw plates 1.8.4 of the fixed head assembly 1 clamp the left end of the aluminum alloy plate 11, and then the upper and lower jaw plates 1.8.4 of the stretching head assembly 2 clamp the right end of the aluminum alloy plate 11; the lifting guide rollers of the front device 13 and the middle carriage 8 descend and disengage from the aluminum alloy plate 11; the left and right centering devices of the front device 13 and the left and right limiting devices of the middle carriage 8 are activated and disengage from the aluminum alloy plate 11.

[0069] The main working cylinder plunger 5.3 of the stretching hydraulic cylinder 5 actuates to perform tension stretching stress relief processing on the aluminum alloy sheet 11. After processing, the main working cylinder plunger 5.3 of the stretching hydraulic cylinder 5 slowly unloads, and the lifting guide rollers of the front device 13 and the intermediate trolley 8 rise to support the aluminum alloy sheet 11 again. The left and right centering devices of the front device 13 and the left and right limiting devices of the intermediate trolley 8 move to the appropriate positions. The upper and lower jaw plates 1.8.4 of the fixed head assembly 1 and the stretching head assembly 2 separate under the tension of the unloading wire rope 1.9.3.2, releasing the clamping of the aluminum alloy sheet 11. The lifting guide rollers of the front device 13 and the intermediate trolley 8 rotate, and the processed aluminum alloy sheet 11 passes through the stretching head feed groove 2.3 of the stretching head assembly 2 and is conveyed to the discharge roller conveyor 10. Finally, the processed aluminum alloy sheet 11 is lifted off the discharge roller conveyor 10 by the final overhead crane.

[0070] In the production process of the aerospace-grade aluminum alloy sheet tension stretching production line of this embodiment, while processing the previous aluminum alloy sheet 11, the next aluminum alloy sheet 11 to be processed can be hoisted onto the feeding roller conveyor 9 by an overhead crane; after the previous aluminum alloy sheet 11 leaves the machine front device 13 and the intermediate trolley 8, the next aluminum alloy sheet 11 can be conveyed to the space between the fixed head assembly 1 and the stretching head assembly 2 by the feeding roller conveyor 9; or the previous aluminum alloy sheet 11 and the next aluminum alloy sheet 11 move synchronously on the aluminum alloy sheet tension stretching production line, and when the previous aluminum alloy sheet 11 moves to the discharge roller conveyor 10, the next aluminum alloy sheet 11 is already in place between the fixed head assembly 1 and the stretching head assembly 2, thereby realizing a continuous production line process, greatly improving the production efficiency of aluminum alloy sheet tension stretching, solving the contradiction between high equipment investment and low production efficiency, and greatly improving the economic benefits of the production enterprise.

[0071] In this embodiment, the aerospace-grade aluminum alloy sheet tension stretching production line can be set up in parallel with the aluminum alloy sheet 11 sawing production line. The sawn aluminum alloy sheet 11 is directly transported to the feeding roller conveyor 9 through the translation device, which can eliminate the aluminum alloy sheet 11 hoisting process, thereby further improving the production efficiency of stress relief processing of aluminum alloy sheet 11.

[0072] The parts of this invention not described in detail are prior art.

Claims

1. An aerospace-grade aluminum alloy sheet tension stretching production line for stretching aerospace-grade aluminum alloy sheets to eliminate residual stress in aluminum alloy sheets (11); including a fixed head assembly (1), a stretching head assembly (2), a pressure beam (3), a pressure beam support (4), a stretching hydraulic cylinder (5), a stretching head buffer cylinder (6), a pressure beam buffer cylinder (7), an intermediate trolley (8), and a track (12). in, The fixed head assembly (1) and the stretching head assembly (2) are used to clamp aluminum alloy plates and stretch them. Among them, the pressure beam (3) is used to bear the pressure of the fixed head assembly (1) and the tension head assembly (2) during operation; Among them, the bearing beam support (4) is used to slide support the bearing beam (3); Among them, the tensioning hydraulic cylinder (5) provides tension for the fixed head assembly (1) and the tensioning head assembly (2) to work; Among them, the stretching head buffer cylinder (6) provides buffer for the stretching head assembly (2) when the belt breaks during the operation of the fixed head assembly (1) and the stretching head assembly (2); Among them, the pressure beam buffer cylinder (7) provides buffer for the pressure beam (3) when the belt breaks during the operation of the fixed head assembly (1) and the tension head assembly (2); Among them, the middle trolley (8) provides support and deformation correction power for the aluminum alloy plate (11); Among them, the track (12) provides support for the movement of the fixed head assembly (1), the tension head assembly (2), and the intermediate trolley (8); Its features are: the fixed head assembly (1) and the tension head assembly (2) both adopt a split structure of upper and lower beams, and the upper and lower beams are fixedly connected by pre-tightening screws (1.5) and pre-tightening nuts (1.6); a through slot is provided in the middle of the upper and lower beams; a clamping jaw device is symmetrically inclined in the through slot, and the clamping jaw device includes a jaw assembly (1.8) and a jaw driving device (1.9).

2. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 1, characterized in that: The outer side of the fixed head assembly (1) is also provided with a feeding roller conveyor (9); the outer side of the stretching head assembly (2) is also provided with a discharge roller conveyor (10).

3. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 1 or 2, characterized in that: The bearing beam support (4) is fixedly set on the ground; the bearing beam (3) is slidably set on the bearing beam support (4), one end of which is fixedly connected to the bearing beam buffer cylinder (7), and the other end is fixedly connected to the tension hydraulic cylinder (5); the bearing beam buffer cylinder (7) is fixedly connected to the ground through a bracket; the tension hydraulic cylinder (5) is slidably connected to a bracket, and the bracket is fixedly set on the ground.

4. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 3, characterized in that: The fixed head assembly (1) includes a fixed head upper beam (1.1) and a fixed head lower beam (1.2). The fixed head upper beam (1.1) and the fixed head lower beam (1.2) are fixedly connected by a pre-tightening screw (1.5) and a pre-tightening nut (1.6). A traveling device A (1.7) is provided at the lower part of the fixed head lower beam (1.2), and the traveling device A (1.7) is set on the track (12). Fixed head upper beam (1.1) and fixed head lower beam (1.2) are respectively provided on both sides. Fixed head upper beam stop plate (1.1.1) and fixed head lower beam stop plate (1.2.1) are respectively provided on both sides. A pressure beam groove (1.10) is formed between the head lower beam stop plate (1.2.1), and the pressure beam (3) is set between the pressure beam groove (1.10). Fixed pin holes (3.1) are evenly distributed on the pressure beam (3). A fixed pin device (1.4) is fixedly installed on the upper part of the fixed head upper stop plate (1.1.1), and a fixed pin (1.4.1) is movably installed in the fixed pin device (1.4). When the fixed head assembly (1) is working, the fixed pin (1.4.1) in the fixed pin device (1.4) falls and inserts into the fixed pin hole (3.1) on the pressure beam (3), so that the fixed head assembly (1) is fixed in position.

5. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 3, characterized in that: The tensioning hydraulic cylinder (5) includes a main working cylinder liner (5.1), a cylinder head (5.2), a main working cylinder plunger (5.3), a rapid moving cylinder liner (5.4), and a piston rod (5.5). The main working cylinder liner (5.1) is provided with a support at its lower part, which is fixedly set on the ground. The main working cylinder liner (5.1) is slidably set on the support. The cylinder head (5.2) is fixedly set at one end of the main working cylinder liner (5.1). The main working cylinder plunger (5.3) is movably set in the main working cylinder liner (5.1). The rapid moving cylinder liner (5.4) is movably set in the main working cylinder plunger (5.3). The piston rod (5.5) is movably set in the rapid moving cylinder liner (5.4). One end of the piston rod (5.5) is fixedly connected to the cylinder head (5.2), and the other end is connected to a tensioning head buffer cylinder (6). The tensioning head buffer cylinder (6) is fixedly set on the ground by the support. The cylinder head (5.2) of the tensioning hydraulic cylinder (5) is fixedly connected to one end of the pressure beam (3).

6. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 5, characterized in that: The tensioning head assembly (2) includes a tensioning head upper beam (2.1) and a tensioning head lower beam (2.2). The tensioning head upper beam (2.1) and the tensioning head lower beam (2.2) are fixedly connected by a pre-tightening screw (1.5) and a pre-tightening nut (1.6). A walking device B (2.7) is provided at the lower part of the tensioning head lower beam (2.2), and the walking device B (2.7) is set on the track (12). The tensioning head upper beam (2.1) and the tensioning head lower beam (2.2) are respectively provided on both sides. The tensioning head upper beam fixing sleeve (2.1.1) and the tensioning head lower beam fixing sleeve (2.2.1) are fixedly connected to the rapid movement cylinder sleeve (5.4) of the tensioning hydraulic cylinder (5).

7. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 1 or 2, characterized in that: A through-hole fixed head feed groove (1.3) is provided between the upper fixed head beam (1.1) and the lower fixed head beam (1.2); a jaw assembly (1.8) and a jaw drive device (1.9) are symmetrically arranged on the upper fixed head beam (1.1) and the lower fixed head beam (1.2); the jaw assembly (1.8) is provided with several jaw plates (1.8.4) for clamping aluminum alloy plates (11); the jaw drive device (1.9) is provided with several clamping cylinders (1.9.2) to provide clamping force to the jaw plates (1.8.4); A through-type stretching head feed groove (2.3) is provided between the upper beam (2.1) and lower beam (2.2) of the stretching head; a jaw assembly (1.8) and a jaw drive device (1.9) are symmetrically arranged on the upper beam (2.1) and lower beam (2.2) of the stretching head; wherein the jaw assembly (1.8) is provided with several jaw plates (1.8.4) for clamping aluminum alloy plates (11); the jaw drive device (1.9) is provided with several clamping cylinders (1.9.2) to provide clamping force for the jaw plates (1.8.4).

8. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 7, characterized in that: The jaw assembly (1.8) includes a jaw base plate (1.8.1), a jaw guide rail (1.8.2), a jaw slider (1.8.3), a jaw jaw plate (1.8.4), and a jaw jaw plate wedge (1.8.5). The jaw guide rail (1.8.2) is elastically connected to the jaw base plate (1.8.1), the jaw slider (1.8.3) is movably connected to the jaw guide rail (1.8.2), and the jaw jaw plate (1.8.4) is connected to the jaw jaw plate wedge (1.8.5). 1.8.5) is fixedly connected to the jaw slider (1.8.3); the jaw assembly (1.8) is symmetrically and fixedly arranged on the upper and lower sides of the fixed head feed groove (1.3) or the stretching head feed groove (2.3) via the jaw base plate (1.8.1); the jaw slider (1.8.3) moves along the inclined jaw guide rail (1.8.2), driving the jaw tooth plate (1.8.4) to move up and down, clamping or loosening the aluminum alloy plate (11).

9. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 8, characterized in that: The jaw drive device (1.9) includes a jaw drive device base (1.9.1), a clamping cylinder (1.9.2), and an unloading cylinder (1.9.3). The clamping cylinder (1.9.2) and the unloading cylinder (1.9.3) are fixedly mounted on the jaw drive device base (1.9.1). One end of the clamping cylinder (1.9.2) is movably equipped with a clamping cylinder push rod (1.9.2.1), which is separate from the jaw slider (1.8.3). One end of the unloading cylinder (1.9.3) is movably equipped with an unloading cylinder pull rod (1.9.3.1), which is connected to the jaw slider (1.8.3) via an unloading wire rope (1.9.3.2). The jaw drive device (1.9) is symmetrically and fixedly installed on the upper and lower sides of the fixed head feed groove (1.3) or the stretching head feed groove (2.3) via the jaw drive device base (1.9.1); when the clamping cylinder push rod (1.9.2.1) extends outward, it pushes the jaw slider (1.8.3) to move, causing the upper and lower jaw teeth (1.8.4) to move closer to each other and clamp the aluminum alloy plate (11); when the unloading cylinder pull rod (1.9.3.1) retracts inward, it pulls the jaw slider (1.8.3) to move via the unloading wire rope (1.9.3.2), causing the upper and lower jaw teeth (1.8.4) to move further away from each other and release the aluminum alloy plate (11).

10. The aerospace-grade aluminum alloy sheet tension stretching production line according to claim 4, characterized in that: Organic front devices (13) are provided on opposite sides of both the fixed head lower beam (1.2) and the tension head lower beam (2.2).

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