Fixed end machine head structure of aviation grade aluminum alloy plate tension stretcher

Abstract

A fixed end machine head structure of an aviation grade aluminum alloy plate tension stretcher adopts an upper beam and lower beam combined design on the whole, so that the weight of a fixed end machine head is greatly reduced, the production cost is reduced, and meanwhile, the problem that a jaw combination and a jaw driving device are difficult to maintain is solved; the jaw driving devices are of a separated structure and are obliquely and fixedly arranged on the fixed head upper beam and the fixed head lower beam respectively, friction between abutting faces of a clamping cylinder ejector rod and a jaw sliding block is eliminated, and the service life of the jaw combination and the service life of 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 the fixed end machine head forms a through material passing groove, the aluminum alloy plate tension stretcher can adopt a continuous assembly line type production process, the aluminum alloy plate tension stretching production efficiency is greatly improved, and the production cost is reduced. The contradiction between high equipment investment and low production efficiency is solved, and the economic benefits of production enterprises are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the aviation level aluminium alloy plate stress treatment equipment, concretely relates to a kind of aviation level aluminium alloy plate tension stretcher fixed end head structure. BACKGROUND

[0002] Aluminium alloy thick plate will produce larger residual stress in rolling, quenching and other production processes, and excessive residual stress will cause deformation in material processing process, and even scrap. Aviation level aluminium alloy plate needs to adopt pre-stretching process to reduce the residual stress of plate in production process, and tension stretcher is a major key equipment to complete this process, and fixed end head is a key component in tension stretcher.

[0003] The existing fixed end head adopts the design of C-shaped plate beam with integral structure, which has the advantages of simple structure and maturity, and is a structure form commonly used for fixed end head of domestic medium and low tonnage tension stretcher. However, with the increase of tonnage of tension stretcher, the size of fixed end head with C-shaped plate beam structure becomes larger and larger, and the excessive size of C-shaped plate beam brings difficulties to its processing and manufacturing due to the limitation of forging or casting manufacturing capacity. In addition, when the crescent plate, jaw sliding block and jaw tooth plate of the fixed end head with integral structure C-shaped plate beam are worn and need to be repaired and replaced, they can only be removed from the side, and the width of the crescent plate, jaw sliding block and jaw tooth plate is relatively wide, so a large repair space is needed for side removal, which increases the occupied area of the equipment, increases the equipment construction investment, and increases the operation difficulty of repairing and replacing the crescent plate, jaw sliding block and jaw tooth plate.

[0004] In two papers of "Structural Strength Analysis and Optimization of Ten-thousand-ton Aviation Tension Stretcher" and "12000-ton Aviation Level Aluminium Alloy Plate Tension Stretcher Equipment", a structural design optimization of fixed end head combined structure design scheme is proposed based on the ten-thousand-ton aviation tension stretcher structure of China Heavy Machinery Research Institute Co., Ltd. The fixed end head is composed of top beam, upper cross beam, lower cross beam and bottom beam, and the top beam, upper cross beam, lower cross beam and bottom beam are fixedly connected to form the fixed end head through pre-tightening bolt and nut, so as to solve the manufacturing difficulty of C-shaped plate beam with integral structure, and reduce the weight of fixed end head while meeting the structural rigidity of fixed end head. However, in the fixed end head combined structure design scheme of the above two papers, the fixed head and stretching head are still composed of the basic framework of top beam, upper cross beam, lower cross beam and bottom beam, so the effect of structural design optimization is limited, and the weight of optimized fixed end head is still relatively large.

[0005] In addition, the two papers of "Structural strength analysis and optimization of 10,000-ton aviation tension stretcher" and "12000-ton aviation tension stretcher equipment of aluminum alloy plate" are based on the structural design of 10,000-ton aviation tension stretcher of China Heavy Machinery Research Institute Co., Ltd. According to the technical scheme of a "pre-clamp jaw driving device" patent application file of China Heavy Machinery Research Institute Co., Ltd. (application number 201320570861.4), the driving of the upper and lower clamp jaw sliding blocks adopts a sequential driving mode of synchronous hydraulic cylinders and secondary clamping cylinders. This driving mode is verified by the two hydraulic cylinders (synchronous hydraulic cylinders) located on the right side of the stretching head in the field object diagram of the tension stretcher unit in the two papers. However, the sequential driving of the synchronous hydraulic cylinders and the secondary clamping cylinders for the upper and lower clamp jaw sliding blocks has two problems: 1. During the driving of the clamp jaw sliding blocks, the push rod moves horizontally, while the clamp jaw sliding blocks move diagonally. Therefore, there is relative sliding friction between the contact surfaces of the push rod and the clamp jaw sliding blocks. The force of the push rod driving the clamp jaw sliding blocks is very large, which causes serious wear between the contact surfaces of the push rod and the clamp jaw sliding blocks, thereby shortening the service life of the push rod and the clamp jaw sliding blocks, increasing the frequency of replacement and maintenance of the push rod and the clamp jaw sliding blocks, and increasing the use and maintenance cost of the fixed end head; 2. After the sequential driving structure of the synchronous hydraulic cylinders and the secondary clamping cylinders is adopted for the upper and lower clamp jaw sliding blocks, the slot on the fixed end head for clamping the aluminum alloy plate is a non-through structure, which causes the tension stretcher to adopt a non-continuous production process. The aluminum alloy plate to be stretched needs to be lifted by a crown block to the fixed end head and the stretching head, then the fixed end head and the stretching head clamp one end of the aluminum alloy plate respectively, the stretching hydraulic cylinder loads the stretching, and after the stress of the aluminum alloy plate is eliminated, the fixed end head and the stretching head are loosened, the stretched aluminum alloy plate is lifted away by the crown block, and then the next aluminum alloy plate can be processed. The non-continuous production process of the tension stretcher results in low production efficiency. As a major engineering equipment, the tension stretcher has high investment, and the contradiction between high equipment investment cost and low production efficiency seriously affects the economic benefit of the production enterprise, so it is urgent to improve. Content of the utility model

[0006] In order to overcome the deficiencies in the background art, the utility model discloses a kind of fixed end head structure of aviation grade aluminum alloy plate tension stretcher, top beam is combined with upper crossbeam, lower crossbeam is combined with bottom beam, the structural design of fixed end head is optimized, and the weight of fixed end head is reduced;Synchronous hydraulic cylinder and secondary clamping cylinder for synchronously driving upper and lower clamp jaw sliding blocks are changed into separate clamp jaw driving device, and upper and lower clamp jaw sliding blocks are independently driven to move, so that the slot for clamping aluminum alloy plate on fixed end head becomes through structure, so that aviation grade aluminum alloy plate tension stretcher can adopt continuous assembly line production process, greatly improve the tension production efficiency of aluminum alloy plate, improve the economic benefit of production enterprise.

[0007] In order to achieve the utility model purposes, the utility model adopts the following technical scheme: a fixed end head structure of an aviation grade aluminum alloy plate tension stretcher, comprising a fixed head upper beam, a fixed head lower beam and a clamping jaw device, the fixed head upper beam and the fixed head lower beam are stacked up and down and are fixedly connected through a pre-tightening screw rod and a pre-tightening screw nut, a fixed head material passing groove is arranged through the contact surface between the fixed head upper beam and the fixed head lower beam, the clamping jaw device is symmetrically arranged on the fixed head material passing groove, and the clamping jaw device is fixedly arranged on the lower part of the fixed head upper beam or the upper part of the fixed head lower beam in an inclined manner.

[0008] Further, the clamping jaw device comprises a jaw combination and a jaw driving device, a jaw tooth plate is movably arranged in the jaw combination, a jaw driving assembly and a jaw unloading assembly are arranged in the jaw driving device, the jaw driving assembly and the jaw unloading assembly drive the upper and lower jaw tooth plates to make opening and closing movements, and the aluminum alloy plate is clamped or loosened.

[0009] Further, the jaw combination comprises a jaw base plate, a jaw guide rail, a jaw sliding block combination and a jaw tooth plate, the jaw guide rail is elastically connected with the jaw base plate, the jaw sliding block combination is slidingly connected with the jaw guide rail, and the jaw tooth plate is fixedly connected with the jaw sliding block combination through a jaw tooth plate wedge; the jaw combination is fixedly arranged on the lower part of the fixed head upper beam and the upper part of the fixed head lower beam through the jaw base plate; when the jaw sliding block combination makes oblique sliding along the jaw guide rail, the jaw sliding block combination drives the jaw tooth plate to make oblique movement.

[0010] Further, a jaw sliding block wear-resistant plate is fixedly arranged on the jaw sliding block combination; lubricating oil grooves are arranged on the contact surface between the sliding block wear-resistant plate and the jaw base plate and the contact surface between the jaw sliding block combination and the jaw guide rail.

[0011] Further, a jaw sliding block positioning head is further fixedly arranged on the side end of the jaw sliding block combination along the movement direction.

[0012] Further, the jaw driving device comprises a jaw driving device base, a jaw driving assembly and a jaw unloading assembly, the jaw driving assembly and the jaw unloading assembly are fixedly arranged on the jaw driving device base; the jaw driving device is fixedly arranged on the lower part of the fixed head upper beam or the upper part of the fixed head lower beam through the jaw driving device base; the jaw driving assembly drives the jaw sliding block combination to make oblique sliding along the jaw guide rail through a driving top rod, so that the upper and lower jaw tooth plates are closed to clamp the aluminum alloy plate; the jaw unloading assembly drives the jaw sliding block combination to make oblique sliding along the jaw guide rail through an unloading steel wire rope, so that the upper and lower jaw tooth plates are loosened to release the aluminum alloy plate; during the working process of the fixed end head, the unloading steel wire rope always has unloading tension.

[0013] Further, a top rod guide sleeve is arranged between the driving top rod and the jaw driving device base; a lubricating oil groove is arranged on the inner side of the top rod guide sleeve.

[0014] Further, the upper fixed head beam and the lower fixed head beam are respectively provided with an upper fixed head beam stop plate and a lower fixed head beam stop plate, and the upper fixed head beam stop plate and the lower fixed head beam stop plate form a bearing beam groove therebetween; the bearing beam is arranged in the bearing beam groove when the fixed end machine head works, and the bearing beam is uniformly provided with penetrating fixed pin holes; the upper fixed head beam stop plate and the lower fixed head beam stop plate are provided with penetrating fixed pin holes; the upper fixed head beam stop plate is fixedly provided with a fixed pin device at the upper portion, and the fixed pin device is movably provided with a fixed pin; when the fixed pin moves downward, the fixed pin is inserted into the fixed pin holes of the bearing beam and the upper fixed head beam stop plate and the lower fixed head beam stop plate, and the position of the fixed end machine head is locked.

[0015] Further, the walking device is fixedly arranged at the lower portion of the lower fixed head beam, and drives the fixed end machine head of the tension stretcher to move horizontally along the track.

[0016] With the technical scheme, the aviation aluminum alloy plate tension stretcher fixed end machine head structure has the following advantages: the upper and lower beams are combined to greatly reduce the weight of the fixed end machine head and the production cost, and to improve the maintenance difficulty of the jaw combination and the jaw driving device; the jaw driving device is arranged separately on the upper fixed head beam and the lower fixed head beam in a separated structure, so that the friction between the clamping cylinder top rod and the jaw sliding block contact surface is eliminated, and the service life of the jaw combination and the jaw driving device is prolonged; the jaw combination and the jaw driving device arranged independently on the upper and lower beams form a penetrating material passing groove, so that the aluminum alloy plate tension stretcher can adopt a continuous assembly line production process, the aluminum alloy plate tension stretching production efficiency is greatly improved, the contradiction between high equipment investment and low production efficiency is solved, and the economic benefit of the production enterprise is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an appearance schematic view of the aviation aluminum alloy plate tension stretcher fixed end machine head structure.

[0018] Figure 2 It is an exploded schematic view of the aviation aluminum alloy plate tension stretcher fixed end machine head structure.

[0019] Figure 3 It is an appearance schematic view of the upper fixed head beam Figure 1 .

[0020] Figure 4 It is an appearance schematic view of the upper fixed head beam Figure 2 .

[0021] Figure 5 It is an appearance schematic view of the lower fixed head beam Figure 1 .

[0022] Figure 6 Schematic diagram of the appearance of the fixed head beam Figure 2 ;

[0023] Figure 7 Schematic diagram of the fixing pin device Figure 2 ;

[0024] Figure 8 Schematic diagram of the jaw assembly Figure 1 ;

[0025] Figure 9 Schematic diagram of the jaw assembly Figure 2 ;

[0026] Figure 10 This is a schematic diagram of the jaw base plate.

[0027] Figure 11 This is a schematic diagram of the jaw guide rail.

[0028] Figure 12 Schematic diagram of the jaw slider assembly Figure 1 ;

[0029] Figure 13 Schematic diagram of the jaw slider assembly Figure 2 ;

[0030] Figure 14 Schematic diagram of the jaw slider assembly Figure 3 ;

[0031] Figure 15 This is a schematic diagram of the cross-sectional structure of the jaw assembly;

[0032] Figure 16 This is a magnified schematic diagram of part A of the cross-sectional structure of the jaw assembly;

[0033] Figure 17 A schematic diagram of the jaw drive device;

[0034] Figure 18 This is a schematic diagram of the base of the jaw drive device.

[0035] Figure 19 This is a schematic diagram of the jaw drive assembly.

[0036] Figure 20 This is a schematic diagram of the jaw unloading component.

[0037] Figure 21 This is a schematic diagram of the cross-sectional structure of the jaw drive device;

[0038] Figure 22 This is a partial enlarged schematic diagram (B) of the cross-sectional structure of the jaw drive device;

[0039] Figure 23 This is a schematic diagram of the cross-sectional structure of the fixed-end machine head;

[0040] Figure 24 This is a partial enlarged C-shaped schematic diagram of the cross-sectional structure of the fixed-end machine head;

[0041] Figure 25 A schematic diagram showing the position of the fixed-end die head in the tension stretching line of aerospace-grade aluminum alloy sheet.

[0042] In the diagram: 1. Fixed head upper beam; 1.1 Upper beam reinforcing boss; 1.2 Upper beam pre-tightening screw hole; 1.3 Fixed head upper beam stop plate; 1.3.1 Upper beam fixing pin hole; 1.4 Upper beam jaw assembly mounting surface; 1.5 Upper beam jaw drive device mounting surface; 2. Fixed head lower beam; 2.1 Lower beam reinforcing boss; 2.2 Lower beam pre-tightening screw hole; 2.3 Fixed head lower beam stop plate; 2.3.1 Lower beam fixing pin hole; 2.4 Lower beam jaw assembly mounting surface; 2.5 Lower beam jaw drive device mounting surface; 2.6 Walking device mounting surface; 3. Fixed head material passage groove; 4. Fixing pin device; 4.1 Fixing pin; 5. Preload screw; 6. Preload nut; 7. Traveling device; 7.1 Traveling device A; 7.2 Traveling device B; 8. Jaw assembly; 8.1 Jaw base plate; 8.1.1 Jaw guide rail fixing groove; 8.1.2 Jaw guide rail fixing hole; 8.1.3 Jaw assembly fixing hole; 8.2 Jaw guide rail; 8.2.1 Jaw guide rail hole; 8.3 Jaw slider assembly; 8.3.1 Jaw slider; 8.3.1.1 Jaw guide rail groove; 8.3.1.2 Oil injection hole; 8.3.1.3 Jaw slider positioning. 8.3.1.4 Unloading wire rope installation groove; 8.3.1.5 Unloading wire rope connection hole; 8.3.1.6 Jaw plate groove; 8.3.1.7 Jaw plate wedge groove; 8.3.2 Jaw slider wear plate; 8.4 Jaw plate; 8.5 Jaw plate wedge; 8.6 Square head nut; 8.7 Butterfly spring; 8.8 Jaw slider positioning head; 9. Jaw drive device; 9.1 Jaw drive device base; 9.1.1 Drive rod guide seat; 9.1.1.1 Drive push rod hole; 9.1.2 Drive cylinder fixing seat; 9.1. 2.1 Reinforcing plate; 9.2 Jaw drive assembly; 9.2.1 Drive cylinder; 9.2.2 Drive piston rod; 9.2.3 Drive push rod; 9.3 Jaw unloading assembly; 9.3.1 Unloading cylinder; 9.3.2 Unloading piston rod; 9.3.3 Unloading wire rope; 9.4 Push rod guide sleeve; 10. Stretching end head; 11. Pressure beam; 12. Pressure beam support; 13. Stretching hydraulic cylinder; 14. Stretching head buffer cylinder; 15. Pressure beam buffer cylinder; 16. Intermediate trolley; 17. Feeding roller conveyor; 18. Discharge roller conveyor; 19. Track; 21. Aluminum alloy sheet. Detailed Implementation

[0043] 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.

[0044] See the instruction manual appendix Figure 1 , 2 A fixed-end head structure for an aerospace-grade aluminum alloy sheet tension stretching machine includes a fixed-head upper beam 1, a fixed-head lower beam 2, and a clamping jaw device. The fixed-head upper beam 1 and the fixed-head lower beam 2 are stacked vertically and fixedly connected by a pre-tightening screw 1.5 and a pre-tightening nut 1.6. A through fixed-head material passage 3 is provided between the contact surfaces of the fixed-head upper beam 1 and the fixed-head lower beam 2. The clamping jaw device is symmetrically arranged vertically in the fixed-head material passage 3. The clamping jaw device is fixedly installed at an angle at the lower part of the fixed-head upper beam 1 or the upper part of the fixed-head lower beam 2. The clamping jaw device includes a jaw assembly 8 and a jaw driving device 9.

[0045] See the instruction manual appendix Figure 3 The upper beam 1 of the fixed head is a rectangular block with a reinforcing boss 1.1 on the top. Each side of the reinforcing boss 1.1 has a through pre-tightening screw hole 1.2. Each side of the upper beam 1 has a fixed head stop plate 1.3 with a fixing pin hole 1.3. (See attached instruction manual.) Figure 4 The upper beam 1 of the fixed head is provided with an inclined upper beam jaw assembly mounting surface 1.4 and an upper beam jaw drive device mounting surface 1.5. The upper beam jaw assembly mounting surface 1.4 and the upper beam jaw drive device mounting surface 1.5 have the same inclination angle. There is a step difference between the upper beam jaw assembly mounting surface 1.4 and the upper beam jaw drive device mounting surface 1.5. The upper beam jaw drive device mounting surface 1.5 is provided with a number of square head nut holes in an array.

[0046] See the instruction manual appendix Figure 5 The lower beam 2 of the fixed head is similar in structure to the upper beam 1 of the fixed head, and is symmetrical in top and bottom. The lower beam 2 of the fixed head is rectangular block-shaped, with a lower beam reinforcing boss 2.1 at the bottom. Each side of the lower beam reinforcing boss 2.1 has a through lower beam pre-tightening screw hole 2.2. Each side of the lower beam 2 of the fixed head has a lower beam stop plate 2.3, and the lower beam stop plate 2.3 has a lower beam fixing pin hole 2.3.1. (See the attached instruction manual.) Figure 6 The upper part of the fixed head lower beam 2 is provided with an inclined lower beam jaw assembly mounting surface 2.4 and a lower beam jaw drive device mounting surface 2.5. The lower beam jaw assembly mounting surface 2.4 and the lower beam jaw drive device mounting surface 2.5 have the same inclination angle. There is a step difference between the lower beam jaw assembly mounting surface 2.4 and the lower beam jaw drive device mounting surface 2.5. The lower beam jaw drive device mounting surface 2.5 is provided with several square head nut holes in an array. The fixed head lower beam 2 is different from the fixed head upper beam 1 in that the lower beam reinforcing boss 2.1 has a walking device mounting surface 2.6 at the four corners.

[0047] Compared to the fixed head structures described in the papers "Structural Strength Analysis and Optimization of 10,000-ton Aviation Tension Stretching Machine" and "Equipment of 12,000-ton Aviation-grade Aluminum Alloy Plate Tension Stretching Machine", the fixed head upper beam 1 and fixed head lower beam 2 above are fixed head upper beam 1 and fixed head lower beam 2, which are fixed head lower beam 2, which are fixed head lower beam 1 and fixed head lower beam 2, respectively, which are fixed head upper beam 1 and fixed head lower beam 2, respectively, which are fixed head lower beam 2, respectively. Therefore, their structural design is optimized, and while ensuring the structural rigidity of fixed head upper beam 1 and fixed head lower beam 2, the weight is also reduced.

[0048] See the instruction manual appendix Figure 8 , 9 The jaw assembly 8 includes a jaw base plate 8.1, a jaw guide rail 8.2, a jaw slider assembly 8.3, a jaw jaw plate 8.4, jaw jaw plate wedges 8.5, and a square head nut 8.6; see the instruction manual appendix. Figure 10 The jaw base plate 8.1 is rectangular. Several jaw guide rail fixing grooves 8.1.1 and jaw assembly fixing holes 8.1.3 are arrayed on one side of the plate. Jaw guide rail fixing holes 8.1.2 are evenly distributed at the bottom of the jaw guide rail fixing grooves 8.1.1. The jaw guide rail fixing holes 8.1.2 are stepped holes. (See attached instruction manual.) Figure 11 The jaw guide rail 8.2 is a dovetail guide rail, and jaw guide rail holes 8.2.1 are arrayed on the jaw guide rail 8.2; the jaw guide rail 8.2 and the jaw base plate 8.1 are elastically connected, and the specific connection structure is shown in the appendix of the instruction manual. Figure 16 The jaw guide rail 8.2 is set in the jaw guide rail fixing groove 8.1.1 of the jaw base plate 8.1 and is connected to the square head nut 8.6 by connecting bolts. Several sets of butterfly spring plates 8.7 are set in the stepped hole of the jaw guide rail fixing hole 8.1.2. The square head nut 8.6 applies a preload to the butterfly spring plates 8.7, thereby achieving an elastic connection between the jaw guide rail 8.2 and the jaw base plate 8.1. The reason for adopting an elastic connection between the jaw guide rail 8.2 and the jaw base plate 8.1 is to solve the problem of the fixed end of the machine head during operation. In the event of a strip breakage accident (the aluminum alloy sheet is pulled apart), to prevent the jaw assembly 8 from experiencing a huge impact that could cause the connecting bolts between the jaw assembly 8 and the upper beam 1 or the lower beam 2 of the fixed head, or the connecting bolts between the jaw guide rail 8.2 and the jaw base plate 8.1 to break; the reason for using the square head nut 8.6 is to prevent it from loosening during operation by engaging with the square head nut hole on the mounting surface 1.5 of the upper beam jaw drive device or the mounting surface 2.5 of the lower beam jaw drive device.

[0049] See the instruction manual appendix Figure 12 , 1314: The jaw slider assembly 8.3 includes a jaw slider 8.3.1 and a jaw slider wear-resistant plate 8.3.2. The jaw slider 8.3.1 is wedge-shaped and has a jaw slider sliding surface and a jaw jaw plate mounting surface. The jaw slider wear-resistant plate 8.3.2 is fixedly mounted on the jaw slider sliding surface by countersunk bolts. The jaw slider sliding surface has a jaw guide rail groove 8.3.1.1, and the jaw jaw plate mounting surface has a jaw jaw plate groove 8.3.1.6 and a jaw jaw plate wedge groove 8.3.1.7. The jaw slider assembly 8.3.1.2 is complete. .3 The jaw guide rail 8.2 is slidably connected to the jaw guide rail 8.2 via the jaw guide rail groove 8.3.1.1; the jaw plate 8.4 is set in the jaw plate groove 8.3.1.6, and is fixed in the jaw plate groove 8.3.1.6 by the jaw plate wedge 8.5, which is then fixedly connected to the jaw slider 8.3.1 by bolts; the wedge-shaped large end of the jaw slider 8.3.1 is also provided with a jaw slider positioning head hole 8.3.1.3 for installing the jaw slider positioning head 8.8; the jaw slider 8.3.1 The wedge-shaped large end jaw guide rail groove 8.3.1.1 is also provided with an unloading wire rope installation groove 8.3.1.4 at the bottom. The unloading wire rope installation groove 8.3.1.4 has through-holes 8.3.1.5 on both side walls for connecting the unloading wire rope 9.3.3. The jaw slider 8.3.1 has an oil injection hole 8.3.1.2 at the wedge-shaped small end. The oil injection hole 8.3.1.2 connects to the lubrication oil passage inside the jaw slider 8.3.1. The outer surface of the jaw slider wear plate 8.3.2 and... A lubricating oil groove is provided on the contact surface between the jaw guide rail groove 8.3.1.1 and the jaw guide rail (8.2). The lubricating oil groove is connected to the lubricating oil channel inside the jaw slider 8.3.1. When the fixed end machine head is maintained, grease is injected through the grease injection nozzle provided at the grease injection hole 8.3.1.2. The grease is injected into the lubricating oil groove of the jaw slider wear plate 8.3.2 and the jaw guide rail groove 8.3.1.1 through the lubricating oil channel, which reduces the friction between the sliding working surfaces, extends the service life of the fixed end machine head, and reduces its maintenance workload.

[0050] See the instruction manual appendix Figure 23 , 24 The jaw assembly 8 is fixed to the upper beam jaw assembly mounting surface 1.4 of the upper beam 1 of the fixed head or the lower beam jaw assembly mounting surface 2.4 of the lower beam 2 of the fixed head by bolts via the jaw base plate 8.1; the square head nut 8.6 is provided in the square head nut hole of the upper beam jaw assembly mounting surface 1.4 or the lower beam jaw assembly mounting surface 2.4.

[0051] See the instruction manual appendix Figure 17 The jaw drive device 9 includes a jaw drive device base 9.1, a jaw drive assembly 9.2, and a jaw unloading assembly 9.3; see the appendix of the instruction manual. Figure 18The jaw drive device base 9.1 includes a drive rod guide seat 9.1.1 and a drive cylinder fixing seat 9.1.2. The drive rod guide seat 9.1.1 is a rectangular thick plate with several through drive rod holes 9.1.1.1 arranged in a front-to-back array. The drive cylinder fixing seat 9.1.2 is a rectangular frame with several reinforcing plates 9.1.2.1 in the middle. The drive rod guide seat 9.1.1 and the drive cylinder fixing seat 9.1.2 are fixedly connected by welding or bolts. See the appendix of the instruction manual. Figure 19 The jaw drive assembly 9.2 includes a drive cylinder 9.2.1 and a drive push rod 9.2.3. The drive push rod 9.2.3 is hinged to the drive piston rod 9.2.2 of the drive cylinder 9.2.1. (See attached instruction manual.) Figure 20 The jaw unloading assembly 9.3 includes an unloading cylinder 9.3.1 and an unloading wire rope 9.3.3. Hinged joints are fixedly installed at both ends of the unloading wire rope 9.3.3. One end of the unloading wire rope 9.3.3 is hingedly connected to the unloading piston rod 9.3.2 of the unloading cylinder 9.3.1. (See the attached instruction manual.) Figure 21 The jaw drive assembly 9.2 and jaw unloading assembly 9.3 are fixedly mounted on the outer end of the drive cylinder mounting base 9.1.2, and the drive push rod 9.2.3 is slidably mounted in the drive push rod hole 9.1.1.1 of the drive rod guide seat 9.1.1; see the appendix of the instruction manual. Figure 22 Both ends of the drive push rod hole 9.1.1.1 are fixedly provided with push rod guide sleeves 9.4. The inner side of the push rod guide sleeve 9.4 is provided with a lubricating oil groove, which is connected to the oil injection hole provided in the drive rod guide seat 9.1.1. The outer end of the oil injection hole of the drive rod guide seat 9.1.1 is provided with an oil injection nozzle. Lubricating grease is injected into the lubricating oil groove of the push rod guide sleeve 9.4 through the oil injection nozzle, which reduces the active wear between the drive push rod 9.2.3 and the push rod guide sleeve 9.4, extends the service life of the fixed end machine head, and reduces its maintenance workload.

[0052] See the instruction manual appendix Figure 23 , 24The jaw drive device 9 is fixed to the upper jaw drive device mounting surface 1.5 of the upper beam of the fixed head upper beam 1 or the lower jaw drive device mounting surface 2.5 of the fixed head lower beam 2 by bolts via the drive device base 9.1. After the jaw drive device 9 is fixedly connected to the fixed head upper beam 1 or the fixed head lower beam 2, the hinge joint at the other end of the unloading wire rope 9.3.3 is set in the unloading wire rope mounting groove 8.3.1.4 of the jaw slider 8.3.1, and is connected to the unloading wire rope by bolts (or cylindrical pins) set in the unloading wire rope connecting hole 8.3.1.5. The hinge joint of rope 9.3.3 is hinged; it should be further noted that during the actual assembly of jaw assembly 8 and jaw drive device 9, one end of unloading wire rope 9.3.3 is first hinged to jaw slider 8.3.1. After jaw drive device 9 is assembled with fixed head upper beam 1 or fixed head lower beam 2, the other end of unloading wire rope 9.3.3 is hinged to unloading piston rod 9.3.2 of unloading cylinder 9.3.1. During the operation of the fixed end machine head, unloading wire rope 9.3.3 always applies unloading tension to jaw slider assembly 8.3.

[0053] The mounting structure of the jaw assembly 8 and jaw drive device 9 in the fixed end of the machine head is open along the stretching direction of the aluminum alloy sheet 21, which makes it very convenient to disassemble and maintain the jaw assembly 8 and jaw drive device 9; see the instruction manual appendix. Figure 23When it is necessary to disassemble the jaw drive device 9 and repair the jaw assembly 8, first disconnect the connection between the unloading wire rope 9.3.3 and the unloading piston rod 9.3.2 from the left side of the fixed end machine head. Then, remove the connecting bolts between the jaw drive device base 9.1 and the upper beam 1 or lower beam 2 of the fixed head. The jaw drive device 9 can then be removed from the left side of the fixed end machine head. Next, remove the connecting bolts between the jaw base plate 8.1 and the upper beam 1 or lower beam 2 of the fixed head. The jaw assembly 8 can then be removed from the left side of the fixed end machine head. Compared with the existing C-shaped plate beam fixed head and tension head with an integral structure, the above method of disassembling and repairing the jaw assembly 8 and jaw drive device 9 does not require reserving maintenance space for disassembling the crescent plate, jaw slider, and jaw jaw plate from the side, which reduces the equipment area and lowers the engineering construction investment. In addition, the jaw drive device 9 of this application has an upper and lower split structure, which is different from the existing... The sequential drive structure using synchronous hydraulic cylinders and secondary clamping cylinders results in a lighter weight and correspondingly improves the ease of maintenance and replacement of the jaw assembly 8 and jaw drive device 9. Furthermore, the split structure of the jaw drive device 9 allows for complete penetration of the fixed head feed groove 3 in the fixed end of the machine head, laying a technical foundation for the continuous stretching production process of aluminum alloy sheet 21. Additionally, the jaw drive device 9 and jaw assembly 8 are set at the same tilt angle in the fixed end of the machine head. Therefore, when the drive rod 9.2.3 abuts against the end face of the jaw slider 8.3.1, and the jaw slider 8.3.1 moves along the jaw guide rail 8.2, no sliding friction occurs between the drive rod 9.2.3 and the jaw slider 8.3.1 contact surface. This extends the service life of the drive rod 9.2.3 and the jaw slider 8.3.1, and reduces the maintenance frequency of the jaw assembly 8 and jaw drive device 9.

[0054] See the instruction manual appendix Figure 1 The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine also includes a fixing pin device 4, which is fixedly installed on the upper part of the fixed head beam stop plate 1.3 of the fixed head beam 1; see the attached instruction manual. Figure 7 The fixing pin device 4 is movably provided with a fixing pin 4.1. When the fixing pin 4.1 moves downward, it is inserted into the fixing pin hole 1.3.1 of the upper beam.

[0055] See the instruction manual appendix Figure 1 , 23 The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine also includes a traveling device 7, which is fixedly installed on the lower part of the fixed head lower beam 2. The traveling device 7 includes a traveling device A7.1 and a traveling device B7.2. A drive device is provided on the traveling device A7.1 or the traveling device B7.2, and the drive device actively drives the traveling device 7 to move in the horizontal direction.

[0056] See the instruction manual appendix Figure 25The attached diagram shows the specific location of the fixed-end die head in the aerospace-grade aluminum alloy sheet tension stretching line, as well as the overall structure of the aerospace-grade aluminum alloy sheet tension stretching line. The aerospace-grade aluminum alloy sheet tension stretching line includes: a fixed-end die head, a stretching end die head 10, a pressure beam 11, a pressure beam support 12, a stretching hydraulic cylinder 13, a stretching head buffer cylinder 14, a pressure beam buffer cylinder 15, an intermediate trolley 16, a feeding roller conveyor 17, a discharging roller conveyor 18, and a track 19. The feeding roller conveyor 17 is movably located on the left side of the fixed-end die head, and the discharging roller conveyor 18 is fixedly located on the right side of the stretching end die head 10. The stretching end die head 10 adopts a similar structural design to the fixed-end die head, with a through stretching head material passage. For the connection relationship of the other components, please refer to "Structural Strength Analysis and Optimization of 10,000-ton Aerospace-grade Tension Stretching Machine" and "Equipment of 12,000-ton Aerospace-grade Aluminum Alloy Sheet Tension Stretching Machine". This constitutes a tension stretching line capable of continuously producing aerospace-grade aluminum alloy sheets.

[0057] The production process of a continuous tension stretching line for aerospace-grade aluminum alloy sheets is as follows:

[0058] When the tension stretching production line starts, the fixed end head is driven by the traveling device A1.7 to move horizontally along the track 19 to a suitable position according to the length of the aluminum alloy plate to be produced. The fixing pin 4.1 in the fixing pin device 4 falls and inserts into the fixing pin hole of the pressure beam 11 to lock the position of the fixed end head. The driving piston rod 9.2.2 and the unloading piston rod 9.3.2 in the jaw driving device 9 retract, and the jaw slider assembly 8.3 is driven to slide along the jaw guide rail 8.2 to the initial position, and the upper and lower jaw teeth 8.4 are at the maximum distance.

[0059] The stretching end head 10 is driven by the stretching hydraulic cylinder 13 to move horizontally along the track 19 to a suitable position; the driving piston rod 9.2.2 and the unloading piston rod 9.3.2 in the jaw drive device 9 retract, driving the jaw slider assembly 8.3 to slide along the jaw guide rail 8.2 to the initial position, and the upper and lower jaw teeth plates 8.4 are at the maximum distance;

[0060] The intermediate trolley 16 and the feeding roller conveyor 17 are driven by the traveling device to move horizontally along the track 19 to a suitable position; the overhead crane lifts the aluminum alloy plate 21 to be processed onto the feeding roller conveyor 17. The guide rollers of the feeding roller conveyor 17 rotate, driving the aluminum alloy plate 21 to move horizontally, passing through the fixed head feed groove 3 of the fixed end machine head, until both ends of the aluminum alloy plate 21 are located between the upper and lower sets of jaw plates 8.4 of the fixed end machine head and the stretching end machine head 10, respectively.

[0061] First, the upper and lower jaw plates 8.4 of the fixed end head clamp the left end of the aluminum alloy plate 21, and then the upper and lower jaw plates 8.4 of the stretching end head 10 clamp the right end of the aluminum alloy plate 21.

[0062] The stretching hydraulic cylinder 13 performs tension stretching stress relief processing on the aluminum alloy sheet 21 through the stretching end head 10; after processing, the stretching hydraulic cylinder 13 slowly unloads, and the upper and lower sets of jaw plates 8.4 of the fixed end head and the stretching end head 10 separate under the tension of the unloading wire rope 9.3.3, releasing the clamping of the aluminum alloy sheet 21; the guide roller of the intermediate carriage 16 rotates, and the processed aluminum alloy sheet 21 passes through the stretching head feed chute of the stretching end head 10 and is conveyed to the discharge roller conveyor 18; finally, the processed aluminum alloy sheet 21 is lifted away from the discharge roller conveyor 18 by the overhead crane.

[0063] 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 21, the next aluminum alloy sheet 21 to be processed can be hoisted onto the feeding roller conveyor 17 by an overhead crane; after the previous aluminum alloy sheet 21 leaves the intermediate trolley 16, the next aluminum alloy sheet 21 can be conveyed to the fixed end head and the stretching end head 10 by the feeding roller conveyor 17; or the previous aluminum alloy sheet 21 and the next aluminum alloy sheet 21 move synchronously on the aluminum alloy sheet tension stretching production line, and when the previous aluminum alloy sheet 21 moves to the discharge roller conveyor 18, the next aluminum alloy sheet 21 is already in place between the fixed end head and the stretching end head 10, thereby realizing a continuous assembly line production 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.

[0064] The parts of this utility model not described in detail are existing technologies.

Claims

1. A fixed-end head structure for an aerospace-grade aluminum alloy sheet tension stretching machine, characterized in that: It includes a fixed head upper beam (1), a fixed head lower beam (2), and a clamping jaw device; the fixed head upper beam (1) and the fixed head lower beam (2) are stacked on top of each other and fixedly connected by a pre-tightening screw (1.5) and a pre-tightening nut (1.6); a through fixed head material passage (3) is provided between the contact surfaces of the fixed head upper beam (1) and the fixed head lower beam (2); the clamping jaw device is symmetrically arranged in the fixed head material passage (3), and the clamping jaw device is fixedly arranged at the lower part of the fixed head upper beam (1) and the upper part of the fixed head lower beam (2) in an inclined manner.

2. The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine according to claim 1, characterized in that: The clamping jaw device includes a jaw assembly (8) and a jaw drive device (9); the jaw assembly (8) is movably provided with jaw teeth (8.4), and the jaw drive device (9) is provided with jaw drive assembly (9.2) and jaw unloading assembly (9.3). The jaw drive assembly (9.2) and jaw unloading assembly (9.3) drive the upper and lower jaw teeth (8.4) to perform opening and closing movements to clamp or loosen the aluminum alloy plate.

3. The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine according to claim 2, characterized in that: The jaw assembly (8) includes a jaw base plate (8.1), a jaw guide rail (8.2), a jaw slider assembly (8.3), and a jaw jaw plate (8.4); the jaw guide rail (8.2) is elastically connected to the jaw base plate (8.1), the jaw slider assembly (8.3) is slidably connected to the jaw guide rail (8.2), and the jaw jaw plate (8.4) is fixedly connected to the jaw slider assembly (8.3) through jaw jaw plate wedges (8.5); the jaw assembly (8) is obliquely fixedly mounted on the lower part of the upper beam (1) of the fixed head or the upper part of the lower beam (2) of the fixed head through the jaw base plate (8.1); when the jaw slider assembly (8.3) slides obliquely along the jaw guide rail (8.2), the jaw slider assembly (8.3) drives the jaw jaw plate (8.4) to move obliquely.

4. The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine according to claim 3, characterized in that: A jaw slider wear plate (8.3.2) is fixedly installed on the jaw slider assembly (8.3); lubricating oil grooves are provided on the contact surface between the slider wear plate (8.3.2) and the jaw base plate (8.1), and on the contact surface between the jaw slider assembly (8.3) and the jaw guide rail (8.2).

5. The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine according to claim 3, characterized in that: The jaw slider assembly (8.3) is also fixedly provided with a jaw slider positioning head (8.8) on one end along the direction of movement.

6. The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine according to claim 2, characterized in that: The jaw drive device (9) includes a jaw drive device base (9.1), a jaw drive assembly (9.2), and a jaw unloading assembly (9.3). The jaw drive assembly (9.2) and jaw unloading assembly (9.3) are fixedly mounted on the jaw drive device base (9.1). The jaw drive device (9) is obliquely fixedly mounted on the lower part of the upper beam (1) of the fixed head or the upper part of the lower beam (2) of the fixed head via the jaw drive device base (9.1). The jaw drive assembly (9.2) is driven by a push rod ( 9.2.3) Drive the jaw slider assembly (8.3) to slide diagonally along the jaw guide rail (8.2) so that the upper and lower jaw teeth (8.4) close and clamp the aluminum alloy plate; The jaw unloading assembly (9.3) drives the jaw slider assembly (8.3) to slide diagonally along the jaw guide rail (8.2) through the unloading wire rope (9.3.3) so that the upper and lower jaw teeth (8.4) release the aluminum alloy plate; During the operation of the fixed end machine head, the unloading wire rope (9.3.3) always maintains unloading tension.

7. The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine according to claim 6, characterized in that: A push rod guide sleeve (9.4) is provided between the drive push rod (9.2.3) and the jaw drive device base (9.1); a lubricating oil groove is provided on the inner side of the push rod guide sleeve (9.4).

8. The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine according to claim 1, characterized in that: The upper beam (1) and lower beam (2) of the fixed head are respectively provided with a fixed head upper beam stop plate (1.3) and a fixed head lower beam stop plate (2.3), and a pressure-bearing beam groove is formed between the fixed head upper beam stop plate (1.3) and the fixed head lower beam stop plate (2.3); the fixed head upper beam stop plate (1.3) and the fixed head lower beam stop plate (2.3) are provided with through fixed pin holes; a fixed pin device (4) is fixedly installed on the upper part of the fixed head upper beam stop plate (1.3), and a fixed pin (4.1) is installed in the fixed pin device (4) and moves up and down; when the fixed pin (4.1) moves downward, it is inserted into the fixed pin hole.

9. The fixed end head structure of the aerospace-grade aluminum alloy sheet tension stretching machine according to claim 1, characterized in that: It also includes a walking device (7); the walking device (7) is fixedly installed at the lower part of the fixed head beam (2) and drives the fixed end machine head to move horizontally along the track.

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