A hot-rolled aluminum plate stretching device

Abstract

The invention belongs to the technical field of aluminum plate processing and production, and specifically relates to a hot-rolled aluminum plate stretching device. The invention mainly provides a hot-rolled aluminum plate stretching device, which can effectively perform a tensioning and stretching process on various hot-rolled aluminum plates after production, and effectively ensure the mechanical properties of the aluminum plates. The hot-rolled aluminum plate stretching device comprises a stretching frame, a stretching fixture is arranged at one end of the stretching frame, and a stretching and tensioning device is arranged at the other end of the stretching frame; the stretching and tensioning device comprises an adjusting stretching rod and a fixed-end stretching clamp body arranged on the stretching frame; the stretching and tensioning device comprises a stretching oil cylinder and a tensioning end stretching clamp body arranged on the stretching frame, and a reset oil cylinder is also arranged at the rear end of the stretching oil cylinder; a tensioning feeding platform is also arranged inside the stretching frame. The hot-rolled aluminum plate stretching device with this structural design effectively improves the surface flatness requirements of the finished aluminum plate processing products and improves the product service life of the hot-rolled aluminum plate and aluminum products.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum plate processing and production; specifically, it relates to a hot-rolled aluminum plate stretching device. Background Art

[0002] Aluminum plate mainly refers to a rectangular plate made by rolling aluminum ingots, which is mainly divided into pure aluminum plate, alloy aluminum plate, thin aluminum plate, medium and thick aluminum plate, patterned aluminum plate, etc.; according to the different production processes of aluminum plates, it is divided into cold-rolled aluminum plate and hot-rolled aluminum plate; cold rolling is processed by a casting rolling machine into a cast-rolled coil and then processed by a cold rolling machine, while hot rolling is heated by heating the aluminum plate ingot and rolling it by a hot rolling machine at high temperature; in the hot rolling process, the hot-rolled billet is mainly heated and then rolled into a coil. Since the hot-rolled aluminum plate is hot-rolled by a hot rolling machine after high-temperature quenching and tempering, the surface quality of the hot-rolled aluminum plate is better, and the mechanical properties and ductility are stronger. , good oxidation effect; hot-rolled aluminum plates are widely used in the field of aluminum processing and production suitable for stamping and stretching; however, since the hot-rolled aluminum plates are processed through high-temperature tempering and hot rolling mill rolling, there are more residual stresses inside the hot-rolled aluminum plates after they are processed and formed. In the process of using hot-rolled aluminum plates to process and produce specific aluminum products, due to the strength and stress requirements of the aluminum products themselves, when the hot-rolled aluminum plate processed parts are superimposed on the working stress and the residual stress, the total stress exceeds the strength limit, and cracks and fractures will appear on the processed parts; this greatly affects the service life and production quality of the specific aluminum product processing products. Summary of the invention

[0003] The purpose of the invention is: mainly to provide a hot-rolled aluminum plate stretching device, which can effectively perform the tensioning and stretching process on various hot-rolled aluminum plates after production, not only effectively eliminate the residual stress in the aluminum plate processing process, effectively ensure the mechanical properties of the aluminum plate, but also effectively improve the surface flatness requirements of the finished aluminum plate products, effectively improve the product service life of the hot-rolled aluminum plate and aluminum products, effectively improve the production and processing efficiency of the enterprise, effectively reduce the labor intensity of workers, effectively improve the quality of the enterprise's finished products, and effectively improve the economic benefits of the enterprise.

[0004] The technical solution of the present invention is:

[0005] Provided is a hot-rolled aluminum plate stretching device, comprising a stretching frame, a stretching fixture arranged at one end of the stretching frame, and a stretching tensioning device arranged at the other end of the stretching frame; the stretching fixture comprises an adjusting stretching rod arranged on the stretching frame, a transition connecting plate is arranged at the front end of the adjusting stretching rod, pin shaft connecting holes are evenly arranged on the transition connecting plate, positioning connecting holes matching the pin shaft connecting holes are also arranged on the stretching frame, a locking pin is arranged between the pin shaft connecting hole and the positioning connecting hole, and a fixed end stretching clamp body is arranged at the front end of the transition connecting plate; the stretching tensioning device comprises a stretching oil cylinder arranged on the stretching frame, a tensioning end stretching clamp body is connected to the output end of the stretching oil cylinder, and a reset oil cylinder is also arranged at the rear end of the stretching oil cylinder; a tensioning feeding platform is also arranged between the fixed end stretching clamp body and the tensioning end stretching clamp body inside the stretching frame.

[0006] The fixed-end stretching clamp and the tensioning-end stretching clamp both include a plurality of parallel hydraulic clamp units, the hydraulic clamp units include two parallel clamp mounting plates, a clamping hydraulic cylinder is fixedly arranged between the two parallel clamp mounting plates, a clamping guide block inclined toward the clamping end is also installed at the front end between the parallel clamp mounting plates, the clamping guide blocks are arranged in two symmetrical arrangements up and down along the center line of the clamp mounting plates; the output end of the clamping hydraulic cylinder is also connected to a clamping sliding block matching the clamping guide block through a transition connection device.

[0007] The transition connection device includes a connecting boss fixedly installed at the output end of the clamping hydraulic cylinder, a slot connecting block is arranged at the front end of the connecting boss, a slot connecting piece is installed on the slot connecting block through a slot connecting bolt, and a connecting fork block is also installed at the other end of the slot connecting piece through a slot connecting bolt, and the connecting fork block is directly connected to the clamping sliding block.

[0008] A guide sliding protrusion with a trapezoidal structure is arranged at the bottom of the clamping guide block, and a guide sliding groove matching with the guide sliding protrusion is arranged at the upper part of the clamping sliding block.

[0009] The clamping guide block arranged at the front end between the mutually parallel clamp mounting plates has an inclination angle of 45°.

[0010] The tensioning loading platform comprises a fixed platform base, a front and rear moving frame matching therewith is arranged on the upper part of the fixed platform base, and front and rear sliding guide rails symmetrically arranged are also arranged at both ends of the fixed platform base, and front and rear sliding blocks matching the front and rear sliding guide rails are arranged at the lower parts of the two ends of the front and rear moving frames; a front and rear transmission screw is also arranged at the middle position of the lower part of the front and rear moving frames, and the front and rear transmission screw is connected with the front and rear transmission motors; an intermediate transition frame is also arranged above the front and rear moving frames, and the front and rear moving frames are connected with the intermediate transition frame through a screw lifting device; a tensioning material frame is arranged above the intermediate transition frame, and left and right sliding guide rails symmetrically arranged are arranged at both ends of the intermediate transition frame, and left and right sliding blocks matching the left and right sliding guide rails are arranged at the lower parts of the two ends of the tensioning material frame, and left and right transmission screws connected to the tensioning material frame are also arranged at the middle position of the intermediate transition frame, and the left and right transmission screws are connected with the left and right transmission motors arranged on the intermediate transition frame; a clamping and centering device is also arranged on the upper part of the tensioning material frame.

[0011] The screw lifting device includes lifting screws respectively arranged at the four corners of the front and rear moving frames, a screw lifting motor is also arranged at the middle position of the front and rear moving frames, and a coupling is arranged in the middle position of adjacent lifting screws. The coupling is connected to the screw lifting motor and the lifting screw through a power transmission shaft and a power distribution shaft respectively.

[0012] The clamping and centering device comprises a clamping and centering block arranged on the upper part of the tensioning material rack, and the clamping and centering block is connected to a clamping transmission system arranged on the tensioning material rack.

[0013] The clamping transmission system adopts chain drive clamping or cylinder drive clamping.

[0014] The hydraulic clamp units are connected by a bolt connection group, which includes auxiliary connection bolts arranged around the clamp mounting plate, and a main connection bolt that penetrates each hydraulic clamp unit is also arranged at the rear end center of the clamp mounting plate.

[0015] The beneficial effects of the present invention are:

[0016] The hot-rolled aluminum plate stretching device with this structural design is effectively suitable for the tensioning and stretching process of various hot-rolled aluminum plates after production. It not only effectively eliminates the residual stress in the aluminum plate processing process, effectively guarantees the mechanical properties of the aluminum plate, but also effectively improves the surface flatness requirements of the finished aluminum plate processing products, effectively improves the product service life of the hot-rolled aluminum plate and aluminum products, effectively improves the production and processing efficiency of the enterprise, effectively reduces the labor intensity of workers, effectively improves the quality of the enterprise's finished products, and effectively improves the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall main structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall top view structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixed-end stretching clamp body and the tensioning-end stretching clamp body of the present invention;

[0020] Figure 4 It is a schematic diagram of the internal cross-sectional structure of the fixed-end stretching clamp body and the tensioning-end stretching clamp body of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the slot connector of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the connecting fork block of the present invention;

[0023] Figure 7 It is a structural schematic diagram of the clamping sliding block of the present invention;

[0024] Figure 8 This is a schematic diagram of the main structure of the tensioning and loading platform of the present invention;

[0025] Fig. 9 It is a schematic diagram of the top view of the tensioning and loading platform of the present invention;

[0026] Fig.10 It is a side structural schematic diagram of the tensioning and loading platform of the present invention;

[0027] Fig.11 It is a schematic structural diagram of the lead screw lifting device of the present invention.

[0028] In the figure, 1 is a stretching frame; 2 is a stretching fixture; 3 is a stretching tensioning device; 4 is an adjustable stretching rod; 5 is a transition connecting plate; 6 is a pin connecting hole; 7 is a positioning connecting hole; 8 is a locking pin; 9 is a fixed-end stretching clamp body; 10 is a stretching cylinder; 11 is a tensioning-end stretching clamp body; 12 is a reset cylinder; 13 is a tensioning feeding platform; 14 is a hydraulic clamp unit; 15 is a clamp mounting plate; 16 is a clamping hydraulic cylinder; 17 is a clamping guide block; 18 is a transition connecting device; 19 is a clamping sliding block; 20 is a connecting boss; 21 is a slot connecting block; 22 is a slot connecting bolt; 23 is a slot connecting piece; 24 is a connecting fork block; 25 is a guide sliding boss ; 26 is the guide sliding groove; 27 is the fixed platform base; 28 is the front and rear moving frame; 29 is the front and rear sliding guide rails; 30 is the front and rear sliding blocks; 31 is the front and rear transmission screws; 32 is the front and rear transmission motors; 33 is the intermediate transition frame; 34 is the screw lifting device; 35 is the tensioning material rack; 36 is the left and right sliding guide rails; 37 is the left and right sliding blocks; 38 is the left and right transmission screws; 39 is the left and right transmission motors; 40 is the clamping and centering device; 41 is the lifting screw; 42 is the screw lifting motor; 43 is the coupling; 44 is the power transmission shaft; 45 is the power distribution shaft; 46 is the clamping and centering block; 47 is the clamping transmission system; 48 is the secondary connecting bolt; 49 is the main connecting bolt. DETAILED DESCRIPTION

[0029] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 11 As shown, a hot-rolled aluminum plate stretching device is provided, including a stretching frame 1, a stretching fixture 2 is arranged at one end of the stretching frame, and a stretching tensioning device 3 is arranged at the other end of the stretching frame; the stretching fixture includes an adjusting stretching rod 4 arranged on the stretching frame, a transition connecting plate 5 is arranged at the front end of the adjusting stretching rod, pin shaft connecting holes 6 are evenly arranged on the transition connecting plate, and positioning connecting holes 7 matching the pin shaft connecting holes are also arranged on the stretching frame, a locking pin shaft 8 is arranged between the pin shaft connecting hole and the positioning connecting hole, and a fixed end stretching clamp body 9 is arranged at the front end of the transition connecting plate; the stretching tensioning device includes a stretching cylinder 10 arranged on the stretching frame, a tensioning end stretching clamp body 11 is connected to the output end of the stretching cylinder, and a reset cylinder 12 is also arranged at the rear end of the stretching cylinder; a tensioning feeding platform 13 is also arranged between the fixed end stretching clamp body and the tensioning end stretching clamp body inside the stretching frame.

[0031] The fixed-end stretching clamp and the tensioning-end stretching clamp both include a plurality of parallel hydraulic clamp units 14, the hydraulic clamp units include two parallel clamp mounting plates 15, a clamping hydraulic cylinder 16 is fixedly arranged between the two parallel clamp mounting plates, a clamping guide block 17 inclined toward the clamping end is also installed at the front end between the parallel clamp mounting plates, the clamping guide blocks are arranged as two symmetrically arranged up and down along the center line of the clamp mounting plates; the output end of the clamping hydraulic cylinder is also connected to a clamping sliding block 19 matching the clamping guide block through a transition connection device 18.

[0032] The transition connection device includes a connecting boss 20 fixedly installed at the output end of the clamping hydraulic cylinder, a slot connecting block 21 is arranged at the front end of the connecting boss, a slot connecting piece 23 is installed on the slot connecting block through a slot connecting bolt 22, and a connecting fork block 24 is also installed at the other end of the slot connecting piece through a slot connecting bolt 22, and the connecting fork block is directly connected to the clamping sliding block.

[0033] A guide sliding protrusion 25 of a trapezoidal structure is arranged at the bottom of the clamping guide block, and a guide sliding groove 26 matching the guide sliding protrusion is arranged at the upper part of the clamping sliding block.

[0034] The clamping guide block arranged at the front end between the mutually parallel clamp mounting plates has an inclination angle of 45°.

[0035] The tensioning loading platform includes a fixed platform base 27, a front and rear moving frame 28 matching the fixed platform base is arranged on the upper part of the fixed platform base, front and rear sliding guide rails 29 arranged symmetrically with each other are also arranged at both ends of the fixed platform base, and front and rear sliding blocks 30 matching the front and rear sliding guide rails are arranged at the lower parts of both ends of the front and rear moving frames; a front and rear transmission screw 31 is also arranged at the middle position of the lower part of the front and rear moving frames, and the front and rear transmission screw is connected to the front and rear transmission motor 32; an intermediate transition frame 33 is also arranged above the front and rear moving frames, and the front and rear moving frames It is connected to the intermediate transition frame through a screw lifting device 34; a tensioning frame 35 is arranged above the intermediate transition frame, and left and right sliding guide rails 36 arranged symmetrically with each other are arranged at both ends of the intermediate transition frame, and left and right sliding blocks 37 matching the left and right sliding guide rails are arranged at the lower parts of both ends of the tensioning frame, and left and right transmission screws 38 connected to the tensioning frame are also arranged at the middle position of the intermediate transition frame, and the left and right transmission screws are connected to the left and right transmission motors 39 arranged on the intermediate transition frame; a clamping and centering device 40 is also arranged on the upper part of the tensioning frame.

[0036] The screw lifting device includes lifting screws 41 respectively arranged at the four corners of the front and rear moving frames, a screw lifting motor 42 is also arranged at the middle position of the front and rear moving frames, and a coupling 43 is arranged in the middle position of adjacent lifting screws. The coupling is connected to the screw lifting motor and the lifting screw through a power transmission shaft 44 and a power distribution shaft 45 respectively.

[0037] The clamping and centering device comprises a clamping and centering block 46 arranged on the upper part of the tensioning rack, and the clamping and centering block is connected to a clamping transmission system 47 arranged on the tensioning rack.

[0038] The clamping transmission system adopts chain drive clamping or cylinder drive clamping.

[0039] The hydraulic clamp units are connected by a bolt connection group, which includes secondary connection bolts 48 inserted around the periphery of the clamp mounting plate, and a main connection bolt 49 inserted through each hydraulic clamp unit is also provided at the rear end center of the clamp mounting plate.

[0040] The design provides a hot-rolled aluminum plate stretching device with a novel and unique structure. In the process of tensioning the hot-rolled aluminum plate, a stretching fixture is arranged at one end of the stretching frame, and a stretching tensioning device is arranged at the other end of the stretching frame; wherein the stretching fixture is arranged by arranging a hydraulic or pneumatic adjustment stretching rod on one side of the stretching frame, the adjustment stretching rod is adjusted according to the structural size of the stretching fixed end as required, and the adjustment stretching rod is retracted and released by hydraulic or pneumatic transmission, and then a transition connecting plate structure is arranged at the front end of the adjustment stretching rod, pin shaft connection holes are evenly arranged on the transition connecting plate, and positioning connection holes matching the pin shaft connection holes are also arranged on the stretching frame. After the adjustment displacement is determined, the adjustment stretching rod is retracted and released by hydraulic or pneumatic transmission. The locking pin is provided between the pin connection hole and the positioning connection hole to fix the stretching fixed end, and then the hot-rolled aluminum plate is clamped and fixed by the fixed-end stretching clamp provided at the front end of the transition connection plate; at the same time, a stretching tensioning device is provided at the other end of the stretching frame, and the stretching tensioning device includes a stretching cylinder provided on the stretching frame, and a stretching end stretching clamp is connected to the output end of the stretching cylinder. During the stretching process, the hot-rolled aluminum plate is positioned and clamped by the stretching end stretching clamp, and a specific stretching process is performed by the stretching cylinder. At the same time, considering the single-stroke stretching process of the stretching cylinder, a reset cylinder is also provided at the rear end of the stretching cylinder, and when the stretching cylinder is stretched backward for a certain distance After the process, the stretching stroke of the stretching cylinder is positioned and locked, and the stretching stroke parameters of the stretching cylinder are adjusted again by adjusting the reset cylinder. After the adjustment is completed, the stretching cylinder is started to stretch until the specified process parameters are reached; in the specific design process of the stretching fixture, a clamping power source is provided by a clamping hydraulic cylinder. When the aluminum plate needs to be clamped for stretching, the output end of the clamping hydraulic cylinder extends out, and a connecting boss is provided at the output end of the clamping hydraulic cylinder. A slot connecting block is provided at the front end of the connecting boss, and a slot connecting piece is installed on the slot connecting block through a slot connecting bolt. A connecting fork block is also installed at the other end of the slot connecting piece through a slot connecting bolt, and the clamping sliding block is pushed by the connecting fork block so that the clamping sliding The block extends forward along the clamping guide block, thereby completing the stretching and clamping process of the hot-rolled aluminum plate; the inclination angle of the clamping guide block is set to 45°, which effectively ensures the versatility of aluminum plates of various thicknesses during the clamping process; at the same time, the special clamp can be composed of a plurality of parallel hydraulic clamp units connected in series with each other. When connected in series, the connection is completed by combining the auxiliary connecting bolts arranged around the clamp mounting plate and the main connecting bolts of each hydraulic clamp unit at the rear end center position of the clamp mounting plate; at the same time, a welding connecting block can be arranged at the rear end of the adjacent clamp mounting plates to effectively ensure the equipment installation space between the clamp mounting plates; at the same time, the mechanical equipment provides an effective tensioning and feeding platform structure;In the specific design process, by setting the front and rear movable frame structure on the fixed platform base, sliding guide rails and front and rear sliding block structures are respectively set at the two ends of the platform and the front and rear movable frame body, and a movable substructure is effectively formed between the two ends of the fixed platform base and the front and rear movable frames. The transmission system is provided with a transmission mode in which the front and rear transmission motors drive the front and rear transmission screws, which effectively ensures that the front and rear movable frames can effectively carry out the forward or backward transmission displacement process driven by the front and rear transmission screws; similarly, an intermediate transition frame is also provided above the front and rear movable frames, and a tensioning material is provided above the intermediate transition frame. The rack has symmetrically arranged left and right sliding guide rails at both ends of the middle transition rack, and left and right sliding blocks matching the left and right sliding guide rails are arranged at the lower parts of both ends of the tensioning rack, effectively forming a left and right moving auxiliary structure between the two ends of the middle transition rack and the tensioning rack, and effectively realizing the left and right movement process of the upper tensioning rack under the drive of the left and right transmission screws and the left and right transmission motors; thereby, the front and rear left and right azimuth adjustment of the tensioning rack set at the top in the design structure can be effectively realized; at the same time, the front and rear moving racks are connected to the middle transition rack through a screw lifting device, and the screw lifting device of this design adopts A screw lifting motor is used to simultaneously lift the four lifting screw structures respectively arranged at the four corners of the front and rear moving frames, which effectively ensures the stability and consistent performance of the lifting process; at the same time, the up and down adjustment process of the tensioning rack is effectively realized; when stretching and loading, the aluminum plate can be placed on the uppermost tensioning rack by a crane or lifting equipment, and then clamped and fixed by a clamping centering block. During the clamping process, it can be effectively clamped by chain drive clamping or cylinder drive clamping, and then connected to the clamping centering block to clamp and fix the tensioned aluminum plate; after fixing, the tensioning end tension can be adjusted and set The extension clamp and the fixed end stretching clamp are used for clamping process; the hot-rolled aluminum plate stretching device with this structural design is effectively applicable to the tensioning and stretching process of various hot-rolled aluminum plates after production, which not only effectively eliminates the residual stress in the aluminum plate processing process, effectively guarantees the mechanical properties of the aluminum plate, but also effectively improves the surface flatness requirements of the finished aluminum plate processing products, effectively improves the product life of the hot-rolled aluminum plate and aluminum products, effectively improves the production and processing efficiency of the enterprise, effectively reduces the labor intensity of the workers, effectively improves the quality of the enterprise's finished products, and effectively improves the economic benefits of the enterprise. ;

Claims

1. A hot-rolled aluminum plate stretching device, comprising a stretching frame, characterized in that: A stretching fixture is provided at one end of the stretching frame, and a stretching tensioning device is provided at the other end of the stretching frame; the stretching fixture includes an adjustable stretching rod provided on the stretching frame, a transition connecting plate is provided at the front end of the adjustable stretching rod, pin shaft connecting holes are evenly provided on the transition connecting plate, a positioning connecting hole matching the pin shaft connecting hole is also provided on the stretching frame, a locking pin shaft is provided between the pin shaft connecting hole and the positioning connecting hole, and a fixed end stretching clamp body for clamping and fixing the hot-rolled aluminum plate is provided at the front end of the transition connecting plate; the stretching tensioning device includes a stretching oil cylinder provided on the stretching frame, a tensioning end stretching clamp body for positioning and clamping the hot-rolled aluminum plate during the stretching process is connected to the output end of the stretching oil cylinder, and a reset oil cylinder is also provided at the rear end of the stretching oil cylinder; a tensioning feeding platform is also provided between the fixed end stretching clamp body and the tensioning end stretching clamp body inside the stretching frame; The fixed-end stretching clamp and the tensioning-end stretching clamp both include a plurality of parallel hydraulic clamp units, the hydraulic clamp units include two clamp mounting plates arranged in parallel to each other, a clamping hydraulic cylinder is fixedly arranged between the two clamp mounting plates arranged in parallel to each other, a clamping guide block inclined toward the clamping end is also installed at the front end between the parallel clamp mounting plates, the clamping guide blocks are arranged in two symmetrical arrangements up and down along the center line of the clamp mounting plates; the output end of the clamping hydraulic cylinder is also connected to a clamping sliding block matching the clamping guide block through a transition connection device; The transition connection device includes a connection boss fixedly installed at the output end of the clamping hydraulic cylinder, a slot connection block is arranged at the front end of the connection boss, a slot connection piece is installed on the slot connection block through a slot connection bolt, and a connection fork block is also installed at the other end of the slot connection piece through a slot connection bolt, and the connection fork block is directly connected to the clamping sliding block, and the clamping sliding block is pushed by the connection fork block, so that the clamping sliding block moves forward along the clamping guide block, thereby completing the stretching clamping process of the hot-rolled aluminum plate; The tensioning loading platform comprises a fixed platform base, a front and rear moving frame matching therewith is arranged on the upper part of the fixed platform base, and front and rear sliding guide rails symmetrically arranged are also arranged at both ends of the fixed platform base, and front and rear sliding blocks matching the front and rear sliding guide rails are arranged at the lower parts of the two ends of the front and rear moving frames; a front and rear transmission screw is also arranged at the middle position of the lower part of the front and rear moving frames, and the front and rear transmission screw is connected with the front and rear transmission motors; an intermediate transition frame is also arranged above the front and rear moving frames, and the front and rear moving frames are connected with the intermediate transition frame through a screw lifting device; a tensioning material frame is arranged above the intermediate transition frame, and left and right sliding guide rails symmetrically arranged are arranged at both ends of the intermediate transition frame, and left and right sliding blocks matching the left and right sliding guide rails are arranged at the lower parts of the two ends of the tensioning material frame, and left and right transmission screws connected to the tensioning material frame are also arranged at the middle position of the intermediate transition frame, and the left and right transmission screws are connected with the left and right transmission motors arranged on the intermediate transition frame; a clamping and centering device is also arranged on the upper part of the tensioning material frame.

2. The hot-rolled aluminum sheet stretching device according to claim 1, characterized in that: A guide sliding protrusion with a trapezoidal structure is arranged at the bottom of the clamping guide block, and a guide sliding groove matching with the guide sliding protrusion is arranged at the upper part of the clamping sliding block.

3. The hot-rolled aluminum sheet stretching device according to claim 1, characterized in that: The clamping guide block arranged at the front end between the mutually parallel clamp mounting plates has an inclination angle of 45°.

4. The hot-rolled aluminum sheet stretching device according to claim 1, characterized in that: The screw lifting device includes lifting screws respectively arranged at the four corners of the front and rear moving frames, a screw lifting motor is also arranged at the middle position of the front and rear moving frames, and a coupling is arranged in the middle position of adjacent lifting screws. The coupling is connected to the screw lifting motor and the lifting screw through a power transmission shaft and a power distribution shaft respectively.

5. The hot-rolled aluminum sheet stretching device according to claim 1, characterized in that: The clamping and centering device comprises a clamping and centering block arranged on the upper part of the tensioning material rack, and the clamping and centering block is connected to a clamping transmission system arranged on the tensioning material rack.

6. A hot-rolled aluminum sheet stretching device according to claim 5, characterized in that: The clamping transmission system adopts chain drive clamping or cylinder drive clamping.

7. The hot-rolled aluminum sheet stretching device according to claim 1, characterized in that: The hydraulic clamp units are connected by a bolt connection group, which includes auxiliary connection bolts arranged around the clamp mounting plate, and a main connection bolt that penetrates each hydraulic clamp unit is also arranged at the rear end center of the clamp mounting plate.

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