Tension stretching production line for aviation-grade aluminum alloy plates

Abstract

According to the aviation grade aluminum alloy plate tension stretching production line, a fixing head assembly and a stretching head assembly are each of an upper and lower beam combined structure, the weight of the fixing head assembly and the weight of the stretching head assembly are greatly reduced, the cost of the aluminum alloy plate tension stretching production line is reduced, and meanwhile the problem that a jaw combination and a jaw driving device are difficult to maintain is solved; jaw combinations and jaw driving devices are independently and symmetrically arranged on upper and lower beams of the fixed head assembly and the stretching head assembly, so that friction between abutting surfaces of a clamping cylinder ejector rod and a jaw sliding block is eliminated, and the service lives of the jaw combinations and the jaw driving devices are prolonged; meanwhile, the jaw combination and the jaw driving device are independently arranged on the upper beam and the lower beam, so that a through material passing groove is formed between the fixed head assembly and the stretching head assembly, and aluminum alloy plates can flow in from one side of a production line and flow out from the other side when being subjected to stretching treatment production, so that a continuous assembly line type production process is formed; and the tension stretching production efficiency of the aluminum alloy plate is greatly improved, and the economic benefits of production enterprises are improved.

Description

Technical Field

[0001] The invention relates to aviation-grade aluminum alloy plate stress treatment equipment, in particular to an aviation-grade aluminum alloy plate tension stretching production line. Background Art

[0002] Aluminum alloy thick plates will produce large residual stress during the production process of rolling and quenching. Excessive residual stress will cause deformation during material processing and even scrap. Aviation-grade aluminum alloy plates need to use a pre-stretching process to reduce the residual stress of the plate during production. The tension stretching machine is a key equipment to complete this process.

[0003] The fixed head and the stretching head of the existing tension stretching machine adopt an integral structure of C-type plate beam, which has the advantages of simple structure and maturity, and is a commonly used structural form for domestic medium and low tonnage tension stretching machines; however, with the increase of the tonnage of the tension stretching machine, the size of the C-type plate beam of the integral structure is getting larger and larger. Limited by the forging or casting manufacturing capacity, the excessive size of the C-type plate beam brings difficulties to its processing and manufacturing; in addition, during the use of the fixed head and the stretching head assembly of the integral structure C-type plate beam, once the crescent plate, the jaw slide block, and the jaw tooth plate are worn and need to be repaired and replaced, the crescent plate, the jaw slide block, and the jaw tooth plate can only be removed from the side, and the crescent plate, the jaw slide block, and the jaw tooth plate are wide, and the lateral removal requires a large maintenance space, which increases the area occupied by the equipment, increases the equipment construction investment, and increases the difficulty of repairing and replacing the crescent plate, the jaw slide block, and the jaw tooth plate.

[0004] In the two papers "Structural Strength Analysis and Optimization of 10,000-ton Aviation Tension Stretching Machine" and "12,000-ton Aviation-grade Aluminum Alloy Plate Tension Stretching Machine Equipment", based on the 10,000-ton aviation tension stretching machine structure of China Heavy Machinery Research Institute Co., Ltd., the structural design optimization of the combined structural design scheme of the fixed head and the stretching head was proposed, that is, the fixed head and the stretching head are both composed of a top beam, an upper cross beam, a lower cross beam, and a bottom beam, and the top beam, the upper cross beam, the lower cross beam, and the bottom beam are fixedly connected to form a fixed head or a stretching head by pre-tightening bolts and nuts, thereby solving the manufacturing problem of the C-type plate beam of the overall structure, and at the same time, without affecting the working performance of the tension stretching machine, The weight of the fixed head and the stretching head is reduced; however, in the combined structural design scheme of the fixed head and the stretching head in the above two papers, the fixed head and the stretching head have not gotten rid of the basic structure composed of four parts: the top beam, the upper cross beam, the lower cross beam, and the bottom beam, so the structural design optimization effect is limited, and the weight of the optimized fixed head and the stretching head is still relatively large.

[0005] In addition, the two papers "Structural Strength Analysis and Optimization of 10,000-ton Aviation Tension Stretching Machine" and "12,000-ton Aviation-grade Aluminum Alloy Plate Tension Stretching Machine Equipment" are both based on the structural design of the 10,000-ton aviation tension stretching machine of China Heavy Machinery Research Institute Co., Ltd. It can be seen from the technical scheme of a patent application document of "A Pre-jaw Driving Device" of China Heavy Machinery Research Institute Co., Ltd. (application number 201320570861.4) that the tooth plate movement is driven by a synchronous hydraulic cylinder and a secondary clamping cylinder sequential drive mode. This driving mode is verified from the on-site physical map of the tension stretching machine unit in the two papers, where the two hydraulic cylinders (i.e., synchronous hydraulic cylinders) located on the right side of the stretching head are set; however, there are two problems with the tooth plate being driven sequentially by a synchronous hydraulic cylinder and a secondary clamping cylinder: 1. In the process of driving the tooth plate movement, the push rod moves horizontally, while the clamp body moves diagonally, so there is relative sliding friction between the push rod and the contact surface of the clamp body, and the force of the push rod pushing the clamp body to move is very large, resulting in severe wear between the contact surface of the push rod and the clamp body, thereby shortening the push rod movement. The service life of the rod and the clamp body increases the replacement and maintenance frequency of the push rod and the clamp body, which increases the use and maintenance cost of the tension stretching machine; 2. After the tooth plate adopts the synchronous hydraulic cylinder and the secondary clamping cylinder sequential drive structure, the grooves on the fixed head and the stretching head for clamping the aluminum alloy plate are non-through structures, resulting in the tension stretching machine can only adopt a non-continuous production process, that is, the aluminum alloy plate to be stretched needs to be lifted between the fixed head and the stretching head by a crane, and then the stretching head and the fixed head clamp one end of the aluminum alloy plate respectively, and the stretching hydraulic cylinder loads and stretches. After eliminating the stress of the aluminum alloy plate, the stretching head and the fixed head are released, and the aluminum alloy plate after stretching is lifted away by the crane, and then the next aluminum alloy plate can be processed; the above-mentioned non-continuous production process of the tension stretching machine leads to low production efficiency, and the tension stretching machine is a major engineering equipment with high investment, and the contradiction between the high equipment investment cost and low production efficiency has seriously affected the economic benefits of the production enterprise, and therefore needs to be improved urgently. Summary of the invention

[0006] In order to overcome the deficiencies in the background technology, the present invention discloses an aviation-grade aluminum alloy plate tension stretching production line. By improving the structural design of the fixed head assembly and the stretching head assembly, many problems of the existing aluminum alloy plate tension stretching machines, such as heavy weight, high cost, difficult and frequent maintenance, and low production efficiency, are solved, thereby improving the economic benefits of the production enterprises.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an aviation-grade aluminum alloy sheet tension stretching production line, which is used for stretching of aviation-grade aluminum alloy sheets to eliminate residual stress of aluminum alloy sheets; it includes 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 sheet and stretch it; wherein the pressure beam is used to withstand the pressure of the fixed head assembly and the stretching head assembly when they are working. ; Among them, the pressure beam support is used for sliding support of the pressure beam; Among them, the stretching hydraulic cylinder provides tension for the fixed head assembly and the stretching head assembly; Among them, the stretching head buffer cylinder provides buffering for the stretching head assembly when the belt breaks during the working process of the fixed head assembly and the stretching head assembly; Among them, the pressure beam buffer cylinder provides buffering for the pressure beam when the belt breaks during the working process of the fixed head assembly and the stretching head assembly; Among them, the intermediate trolley provides support and deformation correction power for the aluminum alloy plate; Among them, the track provides mobile support for the movement of the fixed head assembly, the stretching head assembly and the intermediate trolley; The fixed head assembly and the stretching head assembly both adopt a split structure of upper and lower beams, and the upper and lower beams are fixedly connected by pre-tightening screws and pre-tightening nuts; a through slot is provided in the middle of the upper and lower beams; a clamping jaw device is symmetrically and obliquely arranged in the through slot, and the clamping jaw device includes a jaw combination and a jaw driving device.

[0008] Preferably, a loading roller is movably arranged on the outer side of the fixed head assembly; and a discharging roller is fixedly arranged on the outer side of the stretching head assembly.

[0009] Furthermore, the pressure beam support is fixedly set on the ground; the pressure beam is slidably set on the pressure beam support, one end of which is fixedly connected to the pressure beam buffer cylinder, and the other end is fixedly connected to the stretching hydraulic cylinder; the pressure beam buffer cylinder is fixedly connected to the ground through a bracket; the stretching hydraulic cylinder is slidably connected to the bracket, and the bracket is fixedly set on the ground.

[0010] Furthermore, the fixed head assembly includes a fixed head upper beam and a fixed head lower beam, which are fixedly connected with each other by means of a pre-tightening screw and a pre-tightening nut; a running device A is arranged at the lower part of the fixed head lower beam, and the running device A is arranged on the track; a fixed head beam stop plate and a fixed head lower beam stop plate are respectively arranged on both sides of the fixed head beam and the fixed head lower beam, a pressure beam groove is formed between the fixed head beam stop plate and the fixed head lower beam stop plate, the pressure beam is arranged between the pressure beam grooves, and fixing pin holes are evenly distributed on the pressure beam; a fixing pin device is fixedly arranged on the upper part of the fixed head beam stop plate, and a fixing pin is movably arranged in the fixing pin device; when the fixed head assembly is working, the fixing pin in the fixing pin device falls and is inserted into the fixing pin hole on the pressure beam, so that the position protection of the fixed head assembly is fixed and motionless.

[0011] Furthermore, the stretching hydraulic cylinder includes a main working cylinder sleeve, a cylinder head, a main working cylinder plunger, a quick-moving cylinder sleeve, and a piston rod. A bracket is provided at the lower part of the main working cylinder sleeve, the bracket is fixedly set on the ground, and the main working cylinder sleeve is slidably set on the bracket; the cylinder head is fixedly set at one end of the main working cylinder sleeve, the main working cylinder plunger is movably set in the main working cylinder sleeve, the quick-moving cylinder sleeve is movably set in the main working cylinder plunger, and the piston rod is movably set in the quick-moving cylinder sleeve; one end of the piston rod is fixedly connected to the cylinder head, and the other end is connected to the stretching head buffer cylinder, and the stretching head buffer cylinder is fixedly set on the ground through the bracket; the cylinder head of the stretching hydraulic cylinder is fixedly connected to one end of the pressure beam.

[0012] Furthermore, the stretching head assembly includes an upper beam of the stretching head and a lower beam of the stretching head, which are fixedly connected by a pre-tightening screw and a pre-tightening nut; a walking device B is arranged at the lower part of the lower beam of the stretching head, and the walking device B is arranged on a track; a stretching head beam fixing sleeve and a stretching head lower beam fixing sleeve are respectively arranged on both sides of the upper beam of the stretching head and the lower beam of the stretching head; the upper beam fixing sleeve and the lower beam fixing sleeve of the stretching head are fixedly connected to the quick-moving cylinder sleeve of the stretching hydraulic cylinder.

[0013] Furthermore, a fixed head material trough is provided between the upper beam of the fixed head and the lower beam of the fixed head; a jaw assembly and a jaw driving device are symmetrically provided on the upper beam of the fixed head and the lower beam of the fixed head; wherein the jaw assembly is provided with a plurality of jaw teeth for clamping the aluminum alloy plate; and the jaw driving device is provided with a plurality of clamping cylinders for providing clamping force for the jaw teeth; A through-going stretching head material trough is arranged between the upper beam of the stretching head and the lower beam of the stretching head; a jaw assembly and a jaw driving device are symmetrically arranged on the upper beam of the stretching head and the lower beam of the stretching head; a plurality of jaw teeth plates are arranged in the jaw assembly for clamping the aluminum alloy plate; a plurality of clamping cylinders are arranged in the jaw driving device for providing clamping force for the jaw teeth plates.

[0014] Furthermore, the jaw assembly includes a jaw base plate, a jaw guide rail, a jaw slider, a jaw tooth plate, and a jaw tooth plate wedge. 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 tooth plate is fixedly connected to the jaw slider through the jaw tooth plate wedge; the jaw assembly is symmetrically and fixedly arranged on the upper and lower sides of the fixed head material trough or the stretching head material trough through the jaw base plate; the jaw slider moves along the inclined jaw guide rail, driving the jaw tooth plate to move in the up and down directions, thereby clamping or releasing the aluminum alloy plate.

[0015] Furthermore, the jaw driving device includes a jaw driving device base, a clamping cylinder, and an unloading cylinder, and the clamping cylinder and the unloading cylinder are fixedly arranged on the jaw driving device base; a clamping cylinder top rod is movably arranged at one end of the clamping cylinder, and is separately arranged from the jaw slider; an unloading cylinder pull rod is movably arranged at one end of the unloading cylinder, and the unloading cylinder pull rod is connected to the jaw slider by an unloading wire rope; the jaw driving device is symmetrically and fixedly arranged on the upper and lower sides of the fixed head material trough or the stretching head material trough through the jaw driving device base; when the clamping cylinder top rod extends outward, it pushes the jaw slider to move along the jaw guide rail, so that the upper and lower jaw teeth plates move towards each other, thereby clamping the aluminum alloy plate; when the unloading cylinder pull rod retracts inward, the jaw slider is pulled along the jaw guide rail by the unloading wire rope, so that the upper and lower jaw teeth plates move away from each other, thereby loosening the aluminum alloy plate.

[0016] Furthermore, front devices are arranged on opposite surfaces of the fixed head lower beam and the stretching head lower beam.

[0017] Due to the adoption of the technical scheme as described above, the present invention has the following beneficial effects: in an aviation-grade aluminum alloy sheet tension stretching production line disclosed by the present invention, both the fixed head assembly and the stretching head assembly adopt an upper and lower beam combination structure, 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 difficulty of the jaw assembly and the jaw drive device; the upper and lower beams are independently and symmetrically provided with the jaw assembly and the jaw drive device, eliminates the friction between the clamping cylinder top rod and the contact surface of the jaw slider, and prolongs the service life of the jaw assembly and the jaw drive device; at the same time, the jaw assembly and the jaw drive device independently arranged on the upper and lower beams form a through-feeding trough on the fixed head assembly and the stretching head assembly, and when the aluminum alloy sheet is subjected to the stretching treatment production, it can enter the fixed head assembly and the stretching head assembly from the outside of the fixed head assembly for the stretching treatment, and the aluminum alloy sheet after the stretching treatment flows out from one side of the stretching head assembly, thereby forming a continuous assembly line production process, which greatly improves the production efficiency of the tension stretching of the aluminum alloy sheet, solves the contradiction between the high equipment investment and the low production efficiency, and greatly improves the economic benefits of the production enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a horizontal view of the aviation-grade aluminum alloy sheet tension stretching production line of Example 1; Figure 2 A top view of the aviation-grade aluminum alloy sheet tension stretching production line of Example 1; Figure 3 It is a side view of the aviation-grade aluminum alloy sheet tension stretching production line of Example 1; Figure 4 This is a schematic diagram of the appearance of the fixed head assembly; Figure 5 It is a cross-sectional view of the fixed head assembly structure; Figure 6 This is a schematic diagram of the jaw combination appearance Figure 1 ; Figure 7 This is a schematic diagram of the jaw combination appearance Figure 2 ; Figure 8 This is a schematic diagram of the appearance of the jaw drive device; Fig. 9 is a schematic diagram of the appearance of a fixing pin device; Fig.10 It is a cross-sectional view of the stretching hydraulic cylinder structure; Fig.11 This is a schematic diagram of the appearance of the stretching head assembly; Fig.12 It is a cross-sectional view of the stretching head assembly structure; Fig.13 A cross-sectional view of the assembly structure of the clamping jaw device; Fig.14 This is a horizontal view of the aviation-grade aluminum alloy sheet tension stretching production line of Example 2.

[0019] In the figure: 1. Fixed head assembly; 1.1. Fixed head beam; 1.1.1. Fixed head beam stop plate; 1.2. Fixed head lower beam; 1.2.1. Fixed head lower beam stop plate; 1.3. Fixed head feed chute; 1.4. Fixed pin device; 1.4.1. Fixed pin; 1.5. Preload screw; 1.6. Preload nut; 1.7. Travel 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 tooth plate; 1.8.5. Jaw tooth 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 top rod; 1.9.3. Unloading cylinder; 1.9.3.1. Unloading cylinder pull rod; 1.9.3.2 , unloading wire rope; 1.10, pressure beam groove; 2, stretching head assembly; 2.1, stretching head upper beam; 2.1.1, stretching head beam fixing sleeve; 2.2, stretching head lower beam; 2.2.1, stretching head lower beam fixing sleeve; 2.3, stretching head feeding chute; 2.7, walking 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, stretching hydraulic cylinder; 5.1, main working cylinder sleeve; 5.2, cylinder head; 5.3, main working cylinder plunger; 5.4, fast moving cylinder sleeve; 5.5, piston rod; 5.6, flange connector; 6, stretching head buffer cylinder; 7, pressure beam buffer cylinder; 8, intermediate trolley; 9, loading roller; 10, unloading roller; 11, aluminum alloy plate; 12, track; 13, front device of the machine. DETAILED DESCRIPTION

[0020] The present invention can be explained in detail by the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0021] Example 1, see the attached specification Figure 1 , 2 : An aviation-grade aluminum alloy sheet tension stretching production line, comprising 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 (see the attached manual). Figure 2 In the figure, the middle trolley 8 and the track 12 are not shown), and the track 12 is fixedly arranged on the ground; See the instruction manual Figure 3 : The pressure beam support 4 includes a pressure beam fixed seat 4.1 and a pressure beam slide 4.2. The pressure beam fixed seat 4.1 is fixedly arranged on the ground, the pressure beam slide 4.2 is fixedly arranged on the outer side of the pressure beam 3, and the pressure beam slide 4.2 is slidably arranged on the pressure beam fixed seat 4.1; see the attached manual Figure 1 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 stretching 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 stretching hydraulic cylinder 5 is slidably arranged on the stretching hydraulic cylinder bracket, and the stretching hydraulic cylinder bracket is fixedly connected to the ground; the pressure beam 3 is evenly provided with fixing pin holes 3.1; See the instruction manual Figure 4 :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 walking device A1.7 is arranged at the lower part of the fixed head lower beam 1.2, and the walking device A1.7 is arranged on the track 12, and the walking device A1.7 drives the fixed head assembly 1 to move along the track; a fixed head beam stop plate 1.1.1 and a fixed head lower beam stop plate 1.2.1 are respectively arranged on both sides of the fixed head beam 1.1 and the fixed head lower beam 1.2, and a pressure beam groove 1.10 is formed between the fixed head beam stop plate 1.1.1 and the fixed head lower beam stop plate 1.2.1, and the pressure beam 3 is arranged in the pressure beam groove 1.10; a fixing pin device 1.4 is fixedly arranged on the upper part of the fixed head beam stop plate 1.1.1 (see the attached manual Fig. 9 ), a fixing pin 1.4.1 is movably provided in the fixing pin device 1.4; when the fixing head assembly 1 is working, the fixing head assembly 1 is driven by the running device A1.7 to move horizontally on the track 12, and when it moves into position, the fixing pin 1.4.1 in the fixing pin device 1.4 falls and is inserted into the fixing pin hole 3.1 on the pressure beam 3, so that the position of the fixing head assembly 1 remains fixed; See the instruction manual Fig.10: The stretching hydraulic cylinder 5 includes a main working cylinder sleeve 5.1, a cylinder head 5.2, a main working cylinder plunger 5.3, a fast moving cylinder sleeve 5.4, and a piston rod 5.5. A main working cylinder sleeve bracket is arranged at the lower part of the main working cylinder sleeve 5.1, and the main working cylinder sleeve bracket is fixedly arranged on the ground, and the main working cylinder sleeve 5.1 is slidably arranged on the upper part of the bracket; the cylinder head 5.2 is fixedly arranged at one end of the main working cylinder sleeve 5.1, the main working cylinder plunger 5.3 is movably arranged in the main working cylinder sleeve 5.1, the fast moving cylinder sleeve 5.4 is movably arranged in the main working cylinder plunger 5.3, and the piston rod 5.5 is movably arranged in the fast moving 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 stretching head buffer cylinder 6, and the stretching head buffer cylinder 6 is fixedly arranged on the ground through a bracket; the cylinder head 5.2 of the stretching hydraulic cylinder 5 is fixedly connected to the right end of the pressure beam 3 through a flange connector 5.6; See the instruction manual Fig.11 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 running device B2.7 is arranged at the lower part of the stretching head lower beam 2.2, and the running device B2.7 is arranged 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 arranged on both sides of the stretching head upper beam 2.1 and the stretching head lower beam 2.2; see the attached manual Figure 2 , the upper beam fixing sleeve 2.1.1 of the stretching head, the lower beam fixing sleeve 2.2.1 of the stretching head are fixedly connected with the fast moving cylinder sleeve 5.4 of the stretching hydraulic cylinder 5; In the structure of the above-mentioned fixed head assembly 1 and stretching head assembly 2, the top beam and the upper cross beam in "10,000-ton aviation tension stretching machine structural strength analysis and optimization" and "12,000-ton aviation-grade aluminum alloy plate 11 tension stretching machine equipment" are replaced by the fixed head upper beam 1.1 or the stretching head lower beam 2.1 (that is, the top beam and the upper cross beam structure are combined into one), and the lower cross beam and the bottom beam are replaced by the fixed head lower beam 1.2 or the stretching head lower beam 2.2 (that is, the lower cross beam and the bottom beam structure are combined into one), and the structural design of the fixed head upper beam 1.1, the stretching head upper beam 2.1, the fixed head lower beam 1.2, and the stretching head lower beam 2.2 is optimized. On the premise of meeting the structural strength of the tension stretching machine, the weight of the fixed head assembly 1 and the stretching head assembly 2 is greatly reduced, thereby reducing the cost of the aluminum alloy plate 11 tension stretching production line; See the instruction manual Figure 5 A through-going fixed head material trough 1.3 is arranged between the fixed head upper beam 1.1 and the fixed head lower beam 1.2; a jaw assembly 1.8 and a jaw driving device 1.9 are independently and symmetrically arranged on the fixed head upper beam 1.1 and the fixed head lower beam 1.2; see the attached manual Figure 6 , 7The 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 tooth plate 1.8.4, and a jaw tooth 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, the jaw tooth plate 1.8.4 is fixedly connected to the jaw slider 1.8.3 through the jaw tooth plate wedge 1.8.5, and the jaw tooth plate wedge 1.8.5 is fixedly connected to the jaw slider 1.8.3 by bolts; see the attached manual Fig.13 The jaw assembly 1.8 is symmetrically and fixedly arranged on the upper and lower sides of the fixed head feed trough 1.3 through 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 fixed head beam 1.1 and the upper right part of the fixed head lower beam 1.2, and 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 tooth plate 1.8.4 to move in the up and down direction, clamping or releasing the aluminum alloy plate 11; see the attached manual Figure 8 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 arranged on the jaw drive device base 1.9.1; a clamping cylinder top rod 1.9.2.1 is movably arranged at one end of the clamping cylinder 1.9.2; an unloading cylinder pull rod 1.9.3.1 is movably arranged at one end of the unloading cylinder 1.9.3, 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; see the attached manual Fig.13 The jaw drive device 1.9 is symmetrically and fixedly arranged on the upper and lower sides of the fixed head feeding trough 1.3 through the jaw drive device base 1.9.1, that is, the jaw drive device 1.9 is symmetrically and fixedly arranged on the lower part of the fixed head beam 1.1 and the upper left part of the fixed head lower beam 1.2, the clamping cylinder top rod 1.9.2.1 is separated from the jaw slide 1.8.3, and the unloading cylinder pull rod 1.9.3.1 is connected to the jaw slide 1.8.3 through the unloading wire rope 1.9.3.2; the clamping cylinder top rod 1.9 When .2.1 extends outward, it pushes the jaw slider 1.8.3 to move diagonally to the right along the jaw guide rail 1.8.2, so that the upper and lower jaw teeth 1.8.4 move toward each other and clamp the aluminum alloy plate 11; when the unloading cylinder pull rod 1.9.3.1 retracts inward, the jaw slider 1.8.3 is pulled by the unloading wire rope 1.9.3.2 to move diagonally to the left along the jaw guide rail 1.8.2, so that the upper and lower jaw teeth 1.8.4 move away from each other and release the aluminum alloy plate 11; See the instruction manual Fig.11 , 12A through-drawing head material trough 2.3 is arranged between the upper drawing head beam 2.1 and the lower drawing head beam 2.2; a jaw assembly 1.8 and a jaw driving device 1.9 are symmetrically arranged on the upper drawing head beam 2.1 and the lower drawing head beam 2.2, and the connection structure of the jaw assembly 1.8, the jaw driving device 1.9 and the upper drawing head beam 2.1 and the lower drawing head beam 2.2 is the same as the aforementioned fixed head assembly 1; The installation structure of the jaw assembly 1.8 and the jaw drive device 1.9 in the fixed head assembly 1 and the stretching head assembly 2 is in an open state along the stretching direction of the aluminum alloy plate 11, which is very convenient for the jaw assembly 1.8 and the jaw drive device 1.9 to be disassembled and repaired; taking the fixed head assembly 1 as an example, see the attached manual Figure 5 : When it is necessary to disassemble and repair the jaw assembly 1.8 and the jaw drive device 1.9, first remove 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, and 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, and the jaw drive device 1.9 can be removed from the left side of the fixed head assembly 1; then 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, and the jaw assembly 1.8 can be removed from the left side of the fixed head assembly 1; the above method of disassembling and repairing the jaw assembly 1.8 and the jaw drive device 1.9 Compared with the existing C-type plate beam fixed head and stretching head with an integral structure, there is no need to reserve maintenance space for removing the crescent plate, jaw slide block and jaw tooth plate from the side, which reduces the equipment occupation area and reduces the engineering construction investment; in addition, the jaw drive device 1.9 of the present application is an upper and lower split structure, which is lighter than the existing sequential drive structure using a synchronous hydraulic cylinder and a secondary clamping cylinder, and correspondingly improves the difficulty of repairing and replacing the jaw assembly 1.8 and the jaw drive device 1.9. At the same time, the upper and lower split structure of the jaw drive device 1.9 also enables the fixed head material trough 1.3 of the fixed head assembly 1 and the stretching head material trough 2.3 of the stretching head assembly 2 to be completely penetrated; In addition, the jaw drive device 1.9 is arranged in the fixed head assembly 1 and the stretching head assembly 2 in an inclined manner in the same direction as the movement direction of the jaw slider 1.8.3, and its inclination angle is the same as the movement direction of the jaw slider 1.8.3. Therefore, when the clamping cylinder top rod 1.9.2.1 extends out to abut against the end surface of the jaw slider 1.8.3 and drives the jaw slider 1.8.3 to move along the jaw guide rail 1.8.2, no sliding friction will be generated between the clamping cylinder top rod 1.9.2.1 and the jaw slider 1.8.3, thereby increasing the service life of the clamping cylinder top 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; See the instruction manual Figure 1A front device 13 is also arranged on the opposite side of the fixed head lower beam 1.2 and the stretching head lower beam 2.2, and a lifting guide roller and a left and right centering device are arranged on the upper part of the front device 13; a plurality of intermediate trolleys 8 are arranged between the fixed head assembly 1 and the stretching head assembly 2; a traveling device is arranged at the bottom of the intermediate trolley 8, and the traveling device is arranged on the track 12, and the traveling device drives the intermediate trolley 8 to walk along the track 12; a lifting guide roller and a left and right limit device are arranged on the upper part of the intermediate trolley 8; the lifting guide rollers of the front device 13 and the intermediate trolley 8 are coated with a polymer material to prevent the surface of the aluminum alloy plate 11 from being scratched.

[0022] The production process of the aviation-grade aluminum alloy sheet tension stretching production line of this embodiment is as follows: See the instruction manual Figure 1 : The tension stretching production line is started, and the fixed head assembly 1 is driven by the walking 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 is inserted into the fixed pin hole 3.1 of the pressure beam 3 to lock the position of the fixed head assembly 1; the clamping cylinder top rod 1.9.2.1 and the unloading cylinder pull rod 1.9.3.1 in the jaw drive device 1.9 are retracted, driving the jaw slide 1.8.3 to slide along the jaw guide rail 1.8.2 to the initial position, and the upper and lower jaw tooth plates 1.8.4 are at the maximum distance; The stretching head assembly 2 is driven by the fast moving cylinder sleeve 5.4 of the stretching hydraulic cylinder 5, and the walking device B2.7 moves horizontally to a suitable position along the track 12; the clamping cylinder top rod 1.9.2.1 and the unloading cylinder pull rod 1.9.3.1 in the jaw driving device 1.9 are retracted, driving the jaw slide 1.8.3 to slide along the jaw guide rail 1.8.2 to the initial position, and the upper and lower jaw tooth plates 1.8.4 are at the maximum distance; 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 limit devices of the intermediate trolley 8 are adjusted to a suitable opening; The overhead crane hoists the aluminum alloy plate 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 limit devices of the intermediate trolley 8 are activated to drive the aluminum alloy plate 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 to send the left end of the aluminum alloy plate 11 between the upper and lower jaw teeth 1.8.4 of the fixed head assembly 1; several clamping cylinder top rods 1.9.2.1 on the fixed head assembly 1 are synchronously extended (clamping cylinder top rods 1.9.2.1 are clamped) The rod 1.9.2.1 synchronously moves and is controlled by the servo hydraulic system), and the jaw slider 1.8.3 is pushed against and synchronously slides along the jaw guide rail 1.8.2 obliquely, and the upper and lower jaw teeth 1.8.4 clamp the aluminum alloy plate 11; in the process of the clamping cylinder top rod 1.9.2.1 pushing the jaw slider 1.8.3 to move obliquely, the unloading cylinder pull rod 1.9.3.1 always exerts 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 always maintains tension; The stretching head assembly 2 is driven by the fast moving cylinder sleeve 5.4 of the stretching hydraulic cylinder 5, and moves horizontally to the left along the track 12, so that the right end of the aluminum alloy plate 11 enters between the upper and lower sets of jaw teeth 1.8.4 of the stretching head assembly 2; a plurality of clamping cylinder top rods 1.9.2.1 on the stretching head assembly 2 are synchronously extended (the synchronous action of the clamping cylinder top rods 1.9.2.1 is controlled by the servo hydraulic system), and the jaw slider 1.8.3 is pushed synchronously along the jaw guide rail 1.8.2 to slide obliquely, and the upper and lower sets of jaw teeth 1.8.4 clamp the aluminum alloy plate 11; in the process of the clamping cylinder top rod 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; The lifting guide rollers of the front device 13 and the intermediate trolley 8 are lowered to separate 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 intermediate trolley 8 are activated to separate from the aluminum alloy plate 11; The main working cylinder plunger 5.3 of the stretching hydraulic cylinder 5 moves to the right, and drives the stretching head assembly 2 to move to the right through the fast moving cylinder sleeve 5.4 (at this time, the hydraulic oil between the main working cylinder plunger 5.3 and the fast moving cylinder sleeve 5.4 is in a closed state), and applies 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 in a compressed state); during the process of applying tension to the aluminum alloy plate 11, the jaw teeth 1.8.4 are embedded in the surface of the aluminum alloy plate 11, and as the tension applied by the aluminum alloy plate 11 increases, the clamping force of the upper and lower sets of jaw teeth 1.8.4 on the aluminum alloy plate 11 also increases synchronously; when the tension of the aluminum alloy plate 11 is loaded to the set value, the clamping cylinder top rod 1.9.2.1 retracts to the original position, and the clamping cylinder top rod 1.9.2.1 is separated from the jaw slide block 1.8.3; The tension is continuously increased by the main working cylinder plunger 5.3 of the stretching hydraulic cylinder 5 until the tension applied by the aluminum alloy plate 11 reaches a set value and is maintained for a set time, and then the main working cylinder plunger 5.3 of the stretching hydraulic cylinder 5 is slowly unloaded, and the stretching stress relief of the aluminum alloy plate 11 is completed; The lifting guide rollers of the front device 13 and the intermediate trolley 8 rise to support the aluminum alloy plate 11 again, and the upper and lower sets of jaw teeth 1.8.4 of the fixed head assembly 1 and the stretching head assembly 2 separate up and down under the pulling force of the unloading wire rope 1.9.3.2, releasing the clamping of the aluminum alloy plate 11; The stretching head assembly 2 is driven by the fast moving 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 plate 11 is separated from the upper and lower jaw teeth 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 plate 11 to move to the right, and the left end is separated from the upper and lower jaw teeth 1.8.4 of the fixed head assembly 1; finally, the processed aluminum alloy plate 11 is lifted off the front device 13 and the intermediate trolley 8 by the overhead crane; The above process is repeated to perform tension stretching and stress relief on the next aluminum alloy plate 11 .

[0023] It can be seen from the production process of the aviation-grade aluminum alloy plate tension stretching production line of the above embodiment that its production process is a non-continuous production process, which requires two lifting of the aluminum alloy plate 11. During the period when the overhead crane lifts the aluminum alloy plate 11, the aviation-grade aluminum alloy plate tension stretching production line is in a standby state, so the production efficiency is low. There is a contradiction between high investment cost and low production efficiency, which seriously affects the economic benefits of the production enterprise.

[0024] Example 2, see the attached specification Fig.14 : In this embodiment, a loading roller 9 is movably arranged on the left side of the fixed head assembly 1, and a discharging roller 10 is fixedly arranged on the right side of the stretching head assembly 2; a traveling device is arranged at the lower part of the loading roller 9, and the loading roller 9 is movably arranged on the upper part of the track 12 through the traveling device, and the loading roller 9 can be horizontally moved along the track 12 under the drive of the traveling device; lifting guide rollers and left and right limit devices are arranged on the upper part of the loading roller 9 and the discharging roller 10.

[0025] The production process of the aviation-grade aluminum alloy sheet tension stretching production line of this embodiment is as follows: The tension stretching production line is started, and the fixed head assembly 1 is driven by the walking 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 down and is inserted into the fixed pin hole 3.1 of the pressure beam 3 to lock the position of the fixed head assembly 1; the clamping cylinder top 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 slide 1.8.3 to slide along the jaw guide rail 1.8.2 to the initial position, and the upper and lower jaw tooth plates 1.8.4 are at the maximum distance; The stretching head assembly 2 is driven by the fast moving cylinder sleeve 5.4 of the stretching hydraulic cylinder 5, and the walking device B2.7 moves horizontally to a suitable position along the track 12; the clamping cylinder top rod 1.9.2.1 and the unloading cylinder pull rod 1.9.3.1 in the jaw driving device 1.9 are retracted, driving the jaw slide 1.8.3 to slide along the jaw guide rail 1.8.2 to the initial position, and the upper and lower jaw tooth plates 1.8.4 are at the maximum distance; The intermediate trolley 8 and the feeding roller table 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 table 9 are adjusted to a suitable height, and the left and right centering devices of the front device 13 and the left and right limit devices of the intermediate trolley 8 and the feeding roller table 9 are adjusted to a suitable opening; The overhead crane lifts the aluminum alloy plate 11 to be processed onto the loading roller 9, and the left and right limit devices of the loading roller 9 are activated, driving the aluminum alloy plate 11 to be in the center position on the loading roller 9; the lifting guide roller rotates, driving the aluminum alloy plate 11 to move horizontally, passing through the fixed head feeding trough 1.3 of the fixed head assembly 1, until the two ends of the aluminum alloy plate 11 are respectively located between the upper and lower sets of jaw teeth 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 limit devices of the middle trolley 8 are activated, driving the aluminum alloy plate 11 to be in the center position on the front device 13 and the middle trolley 8; First, the upper and lower sets of jaw teeth 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 sets of jaw teeth 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 trolley 8 are lowered to separate from the aluminum alloy plate 11; the left and right centering devices of the front device 13 and the left and right limit devices of the middle trolley 8 are activated to separate from the aluminum alloy plate 11; The main working cylinder plunger 5.3 of the stretching hydraulic cylinder 5 moves to perform tension stretching and stress relief processing on the aluminum alloy plate 11; after the processing, the main working cylinder plunger 5.3 of the stretching hydraulic cylinder 5 is slowly unloaded, and the lifting guide rollers of the front device 13 and the intermediate trolley 8 rise to support the aluminum alloy plate 11 again, and the left and right centering devices of the front device 13 and the left and right limit devices of the intermediate trolley 8 move to appropriate positions, and the upper and lower sets of jaw teeth 1.8.4 of the fixed head assembly 1 and the stretching head assembly 2 are separated up and down under the pulling force of the unloading wire rope 1.9.3.2 to release the clamping of the aluminum alloy plate 11; the lifting guide rollers of the front device 13 and the intermediate trolley 8 rotate, and the processed aluminum alloy plate 11 passes through the stretching head trough 2.3 of the stretching head assembly 2, and is transported to the discharge roller 10, and finally the processed aluminum alloy plate 11 is lifted off the discharge roller 10 by the overhead crane; During the production process of the aviation-grade aluminum alloy sheet tension stretching production line of this embodiment, when processing the previous aluminum alloy sheet 11, the next aluminum alloy sheet 11 to be processed can be lifted onto the loading roller 9 by the overhead crane; after the previous aluminum alloy sheet 11 leaves the front device 13 and the intermediate trolley 8, the next aluminum alloy sheet 11 can be transported between the fixed head assembly 1 and the stretching head assembly 2 by the loading roller 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 onto the discharge roller 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 assembly line production process, greatly improving the production efficiency of the 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.

[0026] The aviation-grade aluminum alloy sheet tension stretching production line of this embodiment can be arranged in parallel with the aluminum alloy sheet 11 sawing production line. The sawed aluminum alloy sheet 11 is directly transported to the loading roller 9 through a translation device, which can save the aluminum alloy sheet 11 lifting process, thereby further improving the production efficiency of the aluminum alloy sheet 11 stress relief processing.

[0027] The parts not described in detail in this invention are prior art.

Claims

1. An aviation-grade aluminum alloy sheet tension stretching production line, used for stretching of aviation-grade aluminum alloy sheets to eliminate residual stress of aluminum alloy sheets (11); comprising 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 the aluminum alloy plate and perform a stretching process on it; The pressure beam (3) is used to bear the pressure of the fixed head assembly (1) and the stretching head assembly (2) when they are working; Wherein, the pressure beam support (4) is used to slidably support the pressure beam (3); The stretching hydraulic cylinder (5) provides a pulling force for the fixed head assembly (1) and the stretching head assembly (2). The stretching head buffer cylinder (6) provides buffering for the stretching head assembly (2) when the fixed head assembly (1) and the stretching head assembly (2) break during operation; The pressure beam buffer cylinder (7) provides buffering for the pressure beam (3) when the fixed head assembly (1) and the stretching head assembly (2) break during operation; The middle trolley (8) provides support and deformation correction power for the aluminum alloy plate (11); The track (12) provides support for the movement of the fixed head assembly (1), the stretching head assembly (2), and the intermediate trolley (8); The invention is characterized in that: the fixed head assembly (1) and the stretching head assembly (2) both adopt a split structure of upper and lower beams, the upper and lower beams are fixedly connected by a pre-tightening screw (1.5) and a pre-tightening nut (1.6); a through slot is provided between the upper and lower beams; a clamping jaw device is symmetrically and obliquely provided in the through slot, and the clamping jaw device comprises a jaw assembly (1.8) and a jaw driving device (1.9).

2. According to claim 1, the aviation-grade aluminum alloy sheet tension stretching production line is characterized by: A loading roller (9) is movably arranged on the outer side of the fixed head assembly (1); and a discharging roller (10) is fixedly arranged on the outer side of the stretching head assembly (2).

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

4. The aviation-grade aluminum alloy sheet tension stretching production line according to claim 3 is characterized by: The fixed head assembly (1) comprises a fixed head upper beam (1.1) and a fixed head lower beam (1.2), wherein the fixed head upper beam (1.1) and the fixed head lower beam (1.2) are fixedly connected via a pre-tightening screw (1.5) and a pre-tightening nut (1.6); a running device A (1.7) is arranged at the lower part of the fixed head lower beam (1.2), and the running device A (1.7) is arranged on a track (12); a fixed head upper beam stop plate (1.1.1) and a fixed head lower beam stop plate (1.2.1) are respectively arranged on both sides of the fixed head upper beam (1.1) and the fixed head lower beam (1.2); the fixed head upper beam stop plate (1.1.1) and the fixed head lower beam stop plate (1.2.1) are respectively arranged on the fixed head upper beam stop plate (1.1.1) and the fixed head lower beam stop plate (1.2.1) A pressure beam groove (1.10) is formed between the head lower beam stopper plates (1.2.1), the pressure beam (3) is arranged between the pressure beam grooves (1.10), and fixing pin holes (3.1) are evenly distributed on the pressure beam (3); a fixing pin device (1.4) is fixedly arranged on the upper part of the fixed head upper beam stopper plates (1.1.1), and a fixing pin (1.4.1) is movably arranged in the fixing pin device (1.4); when the fixed head assembly (1) is working, the fixing pin (1.4.1) in the fixing pin device (1.4) falls and is inserted into the fixing pin hole (3.1) on the pressure beam (3), so that the fixed head assembly (1) is fixed in position protection.

5. The aviation-grade aluminum alloy sheet tension stretching production line according to claim 3 is characterized by: The stretching hydraulic cylinder (5) comprises a main working cylinder sleeve (5.1), a cylinder head (5.2), a main working cylinder plunger (5.3), a fast moving cylinder sleeve (5.4), and a piston rod (5.5). A bracket is provided at the bottom of the main working cylinder sleeve (5.1), the bracket is fixedly arranged on the ground, and the main working cylinder sleeve (5.1) is slidably arranged on the bracket; the cylinder head (5.2) is fixedly arranged at one end of the main working cylinder sleeve (5.1), the main working cylinder plunger (5.3) is movably arranged in the main working cylinder sleeve (5.1), the fast moving cylinder sleeve (5.4) is movably arranged in the main working cylinder plunger (5.3), and the piston rod (5.5) is movably arranged in the fast moving cylinder sleeve (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 the stretching head buffer cylinder (6), and the stretching head buffer cylinder (6) is fixedly arranged on the ground through the bracket; the cylinder head (5.2) of the stretching hydraulic cylinder (5) is fixedly connected to one end of the pressure beam (3).

6. The aviation-grade aluminum alloy sheet tension stretching production line according to claim 5 is characterized by: The stretching head assembly (2) comprises a stretching head upper beam (2.1) and a stretching head lower beam (2.2), wherein the stretching head upper beam (2.1) and the stretching head lower beam (2.2) are fixedly connected via a pre-tightening screw (1.5) and a pre-tightening nut (1.6); a walking device B (2.7) is arranged at the lower part of the stretching head lower beam (2.2), and the walking device B (2.7) is arranged on a 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 arranged on both sides of the stretching head upper beam (2.1) and the stretching head lower beam (2.2); 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 fast moving cylinder sleeve (5.4) of the stretching hydraulic cylinder (5).

7. The aviation-grade aluminum alloy sheet tension stretching production line according to claim 1 or 2 is characterized by: A fixed head material trough (1.3) is provided between the fixed head upper beam (1.1) and the fixed head lower beam (1.2); a jaw assembly (1.8) and a jaw drive device (1.9) are symmetrically provided on the fixed head upper beam (1.1) and the fixed head lower beam (1.2); wherein the jaw assembly (1.8) is provided with a plurality of jaw teeth (1.8.4) for clamping the aluminum alloy plate (11); and the jaw drive device (1.9) is provided with a plurality of clamping cylinders (1.9.2) for providing clamping force for the jaw teeth (1.8.4); A stretching head material trough (2.3) is provided between the stretching head upper beam (2.1) and the stretching head lower beam (2.2); a jaw assembly (1.8) and a jaw driving device (1.9) are symmetrically provided on the stretching head upper beam (2.1) and the stretching head lower beam (2.2); wherein the jaw assembly (1.8) is provided with a plurality of jaw teeth (1.8.4) for clamping the aluminum alloy plate (11); and the jaw driving device (1.9) is provided with a plurality of clamping cylinders (1.9.2) for providing clamping force for the jaw teeth (1.8.4).

8. The aviation-grade aluminum alloy sheet tension stretching production line according to claim 7 is characterized by: The jaw assembly (1.8) includes a jaw base plate (1.8.1), a jaw guide rail (1.8.2), a jaw slide (1.8.3), a jaw tooth plate (1.8.4), and a jaw tooth 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 slide rail (1.8.3) is movably connected to the jaw guide rail (1.8.2), and the jaw tooth plate (1.8.4) is connected to the jaw tooth plate wedge (1.8.5). The jaw assembly (1.8) is symmetrically and fixedly arranged on the upper and lower sides of the fixed head material trough (1.3) or the stretching head material trough (2.3) through the jaw base plate (1.8.1); the jaw slide (1.8.3) moves along the inclined jaw guide rail (1.8.2), driving the jaw tooth plate (1.8.4) to move in the up and down directions, thereby clamping or releasing the aluminum alloy plate (11).

9. The aviation-grade aluminum alloy sheet tension stretching production line according to claim 8 is characterized by: The jaw drive device (1.9) comprises a jaw drive device base (1.9.1), a clamping cylinder (1.9.2) and an unloading cylinder (1.9.3), wherein the clamping cylinder (1.9.2) and the unloading cylinder (1.9.3) are fixedly arranged on the jaw drive device base (1.9.1); a clamping cylinder top rod (1.9.2.1) is movably arranged at one end of the clamping cylinder (1.9.2) and is separated from the jaw slide (1.8.3); an unloading cylinder pull rod (1.9.3.1) is movably arranged at one end of the unloading cylinder (1.9.3), and the unloading cylinder pull rod (1.9.3.1) is connected to the jaw slide (1.8.3) via an unloading wire rope (1.9.3.2); The jaw drive device (1.9) is symmetrically and fixedly arranged on the upper and lower sides of the fixed head material trough (1.3) or the stretching head material trough (2.3) through the jaw drive device base (1.9.1); when the clamping cylinder top rod (1.9.2.1) extends outward, it pushes the jaw slide block (1.8.3) to move, so that the upper and lower jaw tooth plates (1.8.4) move towards each other, thereby clamping the aluminum alloy plate (11); when the unloading cylinder pull rod (1.9.3.1) retracts inward, the jaw slide block (1.8.3) is pulled by the unloading wire rope (1.9.3.2) to move, so that the upper and lower jaw tooth plates (1.8.4) move away from each other, thereby releasing the aluminum alloy plate (11).

10. The aviation-grade aluminum alloy sheet tension stretching production line according to claim 4 is characterized by: The fixed head lower beam (1.2) and the stretching head lower beam (2.2) are both provided with a front device (13) on the opposite sides.

Images