Aluminum plate stretcher and aluminum plate positioning method

Abstract

The invention relates to an aluminum plate stretching machine and an aluminum plate positioning method, and belongs to the technical field of plate stretching machines, the aluminum plate stretching machine comprises a movable stretching head and a fixed stretching head, and the movable stretching head and the fixed stretching head are each provided with a jaw and a clamp located in the jaw; blocking devices are arranged in jaws of the movable stretching head and the fixed stretching head, the blocking devices are used for abutting against the aluminum plate entering the jaws, the blocking devices are further provided with sensing parts, and the sensing parts are used for sensing whether the aluminum plate abuts against the blocking devices or not; when the two ends of the aluminum plate abut against the abutting device in the movable stretching head and the abutting device in the fixed stretching head respectively, the clamp of the movable stretching head and the clamp of the fixed stretching head clamp the aluminum plate at the same time. The method is used for positioning the aluminum plate on the aluminum plate stretching machine. Therefore, the aluminum plate can be more accurately positioned on the aluminum plate stretcher, so that the aluminum plate can be better clamped on the aluminum plate stretcher, and the time for positioning and clamping the aluminum plate is shorter.

Description

Technical Field

[0001] The present invention belongs to the technical field of plate stretching machines, and particularly relates to an aluminum plate stretching machine and an aluminum plate positioning method. Background Art

[0002] In the prior art, an aluminum plate stretching machine is configured with a fixed stretching head and a movable stretching head. Each stretching head is provided with a jaw, and a clamp is arranged in the jaw. When an aluminum plate enters the jaw and is placed between the clamps, a push rod pushes the clamps to clamp the aluminum plate. In order to obtain a uniform clamping force to ensure the stretching effect, the clamping position of the clamp on the aluminum plate is extremely important. Therefore, the depth at which the aluminum plate enters the jaw needs to be strictly controlled. Currently, photoelectric switches are arranged on both the fixed stretching head and the movable stretching head, and the depth at which the aluminum plate enters the jaw is controlled by the above-mentioned photoelectric switches and the displacement parameters set in the control system.

[0003] For example, in the requirements for stretching an aluminum plate, the clamping position of the clamp is 500 mm away from the plate end. Then the displacement parameter set in the control system is 500 mm.

[0004] After the aluminum plate is hoisted by a hoisting device between the movable stretching head and the fixed stretching head, the control system controls the movable stretching head to start moving towards the side close to the fixed stretching head until the photoelectric switch on the movable stretching head senses one end (the plate end) of the aluminum plate. At this time, the control system defines it as the first initial state and controls the movable stretching head to continue moving towards the fixed stretching head. When the moving stroke of the movable stretching head reaches 500 mm, the control system controls the movable stretching head to stop and drives the clamp on the movable stretching head to clamp the aluminum plate. At this time, it is determined that the depth at which the aluminum plate enters the jaw of the movable stretching head is 500 mm, that is, the clamp on the movable stretching head clamps at a position 500 mm away from one end (the plate end) of the aluminum plate.

[0005] After the clamp on the movable stretching head clamps the aluminum plate, the control system controls the movable stretching head to start moving again and continue moving towards the fixed stretching head, thereby pushing the aluminum plate towards the fixed stretching head. When the aluminum plate is about to enter the jaw of the fixed stretching head, the photoelectric switch on the fixed stretching head senses the other end (the plate end) of the aluminum plate (it should be noted that the one end and the other end of the above-mentioned aluminum plate refer to the two ends of the aluminum plate in the length direction). At this time, the control system defines it as the second initial state and controls the movable stretching head to continue moving towards the fixed stretching head. When the moving stroke of the movable stretching head reaches 500 mm again, the control system controls the movable stretching head to stop and drives the clamp on the fixed stretching head to clamp the aluminum plate. At this time, it is determined that the depth at which the aluminum plate enters the fixed stretching head is 500 mm, that is, the clamp on the fixed stretching head clamps at a position 500 mm away from the other end (the plate end) of the aluminum plate.

[0006] Currently, the above method is generally used to position the aluminum plate in the aluminum plate stretching machine, but there are the following problems: 1. Because the aluminum plate will have more or less warping and bulging after rolling, causing the plate end of the aluminum plate to warp, the aluminum plate entering the stretching machine is not 100% flat. After the warped or bulged aluminum plate ends enter the jaws of the mobile stretching head, they are likely to contact with the clamping surface of the clamp and generate friction. In this case, the above friction is likely to drive the aluminum plate to move with the mobile stretching head, and eventually cause the clamp of the mobile stretching head to clamp when the depth of the aluminum plate entering the jaws of the mobile stretching head has not reached the above displacement parameter, resulting in the clamping length of the mobile stretching head clamp on the aluminum plate being too short, which doubles the clamp stress and increases the equipment failure rate; 2. Because the mobile stretching head has a large inertia from movement to stop, for aluminum plates that are 100% flat, the clamps on the mobile stretching head and the fixed stretching head will actually clamp at a position that exceeds the above displacement parameter. For example, the displacement parameter is 500mm, but in fact, when the mobile stretching head stops moving completely, the plate end of the aluminum plate has entered the jaws of the mobile stretching head and the fixed stretching head by 510mm. This situation will also cause the clamping length of the mobile stretching head clamp on the aluminum plate to be too long, reducing the yield rate; 3. During the whole process, the mobile stretching head needs to move first, then stop, and then start again; the mobile stretching head clamp first clamps the aluminum plate, and then the fixed stretching head clamp clamps the aluminum plate, which requires two clamping times; this will waste a lot of time, resulting in a longer auxiliary time for the aluminum plate on the stretching machine. Summary of the invention

[0007] The present invention provides an aluminum plate stretching machine and an aluminum plate positioning method, which are used to solve the technical problems that the clamps of the existing aluminum plate stretching machine cannot clamp the accurate position on the aluminum plate and the time spent on positioning and clamping the aluminum plate is long.

[0008] The present invention is implemented through the following technical scheme: an aluminum plate stretching machine, comprising a movable stretching head and a fixed stretching head, the movable stretching head and the fixed stretching head are both provided with a jaw and a clamp located in the jaw, a resisting device is provided in the jaws of the movable stretching head and the fixed stretching head, the resisting device is located behind the clamp, and the resisting device is used to resist the aluminum plate entering the jaw, and a sensing part is also provided on the resisting device, and the sensing part is used to sense whether the aluminum plate is tightly against the resisting device; When the two end plate ends of the aluminum plate are respectively pressed against the resisting device in the movable stretching head and the resisting device in the fixed stretching head, the clamp of the movable stretching head and the clamp in the fixed stretching head clamp the aluminum plate at the same time.

[0009] Furthermore, in order to better implement the present invention, the resisting device includes: a resisting beam disposed in the jaws; The abutting plate is slidably mounted on the abutting beam, and the abutting plate is used to abut against the aluminum plate; The locking connection part is connected between the abutting beam and the abutting plate. When the aluminum plate does not abut against the abutting plate, the abutting plate is locked to the abutting beam through the locking connection part. When the aluminum plate abuts against the abutting plate, the locking connection part is unlocked; The sensing part is arranged between the abutting beam and the abutting plate.

[0010] Further, to better implement the present invention, the locking connection part includes: An elastic connecting piece is installed between the abutting plate and the abutting beam to elastically connect the abutting plate and the abutting beam; An adjusting connecting piece is installed between the abutting plate and the abutting beam, and the elastic connecting piece is in a compressed state under the action of the adjusting connecting piece.

[0011] Further, to better implement the present invention, the elastic connecting piece is a compression spring. A fixing block is fixedly provided at both ends of the abutting beam. Each fixing block is provided with an installation hole. The compression spring is installed in the installation hole, and both ends of the compression spring respectively abut against the bottom of the installation hole and the abutting plate; The adjusting connecting piece includes a rod body and a nut. A baffle is provided at one end of the rod body. The abutting plate is provided with a first through hole, and the bottom of the installation hole is provided with a second through hole. The rod body sequentially passes through the first through hole, the installation hole and the second through hole and is screwed with the nut. The compression spring is sleeved on the rod body.

[0012] Further, to better implement the present invention, the installation hole is a through hole. A sealing plate covering the through hole is bolted and fixed at one end of the fixing block away from the abutting plate. The sealing plate constitutes the bottom of the installation hole, and the second through hole is opened on the sealing plate.

[0013] Further, to better implement the present invention, the sensing part is a proximity switch, and the proximity switch is installed on the outer wall of the fixing block; When the aluminum plate abuts tightly against the abutting device, the abutting plate moves to the position closest to the proximity switch to trigger the proximity switch.

[0014] Further, to better implement the present invention, the abutting beam is slidably mounted in the jaw, and the abutting beam is connected with a translation driving part. The translation driving part is used to drive the abutting beam to translate in the jaw to change the distance between the abutting beam and the edge of the jaw.

[0015] Further, to better implement the present invention, guiding members are installed on the inner walls of the upper and lower sides of the jaw. The guiding members are provided with sliding grooves. The upper surface and the lower surface of the end of the resisting beam are both provided with sliders, and the sliders are slidably installed in the sliding grooves. A guiding gap is formed between the guiding members on the inner walls of the upper and lower sides of the jaw, and the pushing plate is slidably installed in the guiding gap.

[0016] Further, to better implement the present invention, first guiding notches are opened on the outer walls of the upper and lower sides of the pushing plate. The sliders extend out of the resisting beam, and the slider portions extending out of the resisting beam are guiding blocks. The guiding blocks are slidably installed in the first guiding notches. Second guiding notches are also opened on the side walls of the first guiding notches. A side sliding plate covering the guiding blocks is installed on the outer side wall of the slider. The side sliding plate is slidably installed in the second guiding notches, and the side sliding plate is also slidably installed in the sliding grooves on the guiding members.

[0017] The aluminum plate positioning method provided by the present invention uses the above-mentioned aluminum plate stretching machine to position the aluminum plate, including: Step 1: Hoist the aluminum plate between the moving stretching head and the fixed stretching head of the aluminum plate stretching machine. Step 2: Drive the moving stretching head to move towards the fixed stretching head so that one end of the aluminum plate enters the jaw of the moving stretching head and abuts against the resisting device (300) in the moving stretching head. When one end of the aluminum plate tightly abuts against the resisting device in the moving stretching head, the sensing portion in the moving stretching head emits a sensing signal. During this process, the moving stretching head keeps moving. Step 3: The aluminum plate is pushed by the resisting device in the moving stretching head and moves towards the fixed stretching head so that the other end of the aluminum plate enters the jaw of the fixed stretching head and abuts against the resisting device in the fixed stretching head. When the other end of the aluminum plate tightly abuts against the resisting device in the fixed stretching head, the sensing portion in the fixed stretching head emits a sensing signal. Step 4: When the sensing portion in the moving stretching head and the sensing portion in the fixed stretching head both emit sensing signals, drive the moving stretching head to stop moving, and drive the clamp of the moving stretching head and the clamp of the fixed stretching head to clamp the aluminum plate simultaneously.

[0018] The present invention has the following beneficial effects compared with the prior art: The aluminum plate stretching machine provided by the present invention includes a moving stretching head and a fixed stretching head. Both the moving stretching head and the fixed stretching head are provided with jaws and clamps located in the jaws. Resisting devices are also provided in the jaws of the moving stretching head and the fixed stretching head. The resisting devices are located behind the corresponding clamps, and the resisting devices are used to abut against the aluminum plate entering the jaws. An sensing portion is also provided on the resisting device, and the sensing portion is used to sense whether the aluminum plate abuts tightly against the resisting device.

[0019] In use, first lift the aluminum plate to between the movable stretching head and the fixed stretching head, and then drive the movable stretching head to move towards the fixed stretching head, so that one end of the aluminum plate enters the jaws of the movable stretching head. Since the above-mentioned resisting device is located behind the clamp in the jaws, one end of the aluminum plate will first pass through the clamping position of the clamp in the movable stretching head. Whether one end of the aluminum plate abuts tightly against the resisting device in the movable stretching head or not, the movable stretching head keeps moving at a constant speed. Because the aluminum plate abuts tightly against the resisting device in the movable stretching head or rubs against the clamp, the movable stretching head will push the aluminum plate to move synchronously towards the fixed stretching head, so that the other end of the aluminum plate enters the jaws of the fixed stretching head and abuts against the resisting device in the fixed stretching head. When the other end of the aluminum plate abuts tightly against the resisting device in the fixed stretching head, the sensing part in the fixed stretching head emits a sensing signal. And when the sensing parts in both the movable stretching head and the fixed stretching head emit sensing signals, drive the movable stretching head to stop moving, and drive the clamps in the movable stretching head and the fixed stretching head to clamp the aluminum plate simultaneously.

[0020] With the above structure, regardless of whether there are warping and shrugging phenomena in the aluminum plate, only when the plate end of the aluminum plate enters the jaws and abuts tightly against the resisting device, the corresponding sensing part will emit a sensing signal. And only when the sensing parts in both the movable stretching head and the fixed stretching head emit sensing signals, will the movable stretching head be driven to stop moving and the clamps in the movable stretching head and the fixed stretching head be driven to clamp the aluminum plate simultaneously. When both ends of the aluminum plate abut tightly against the resisting devices in the movable stretching head and the fixed stretching head respectively, the aluminum plate is tightly held between the resisting devices at both ends. At this time, the aluminum plate can no longer displace relative to the clamp, that is, in this case, the position of the clamp relative to the aluminum plate is fixed, and the clamping position of the clamp on the aluminum plate is fixed. In this way, the aluminum plate can be accurately positioned between the movable stretching head and the fixed stretching head. In addition, during the whole process, the movable stretching head will only stop when the sensing parts in both the movable stretching head and the fixed stretching head emit sensing signals, that is, the movable stretching head does not need to stop and wait for the clamp in it to clamp the aluminum plate during the whole process. In this way, the positioning and clamping time of the aluminum plate on the aluminum plate stretching machine can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0022] Figure 1 is a schematic structural diagram of the resisting device provided by an embodiment of the present invention; Figure 2 is Figure 1 a partially enlarged view of region A in Figure 3 is a front view structural schematic diagram of an aluminum plate stretching head equipped with a resisting device in an embodiment of the present invention; Figure 4 is a structural schematic diagram when the actuating plate of the resisting device in an embodiment of the present invention is placed inside the clamping position of the clamp; Figure 5 is a top view structural schematic diagram of an aluminum plate stretching head equipped with a resisting device in an embodiment of the present invention; Figure 6 is Figure 5 a partially enlarged view of region B in Figure 7 is Figure 5 a partially enlarged view of region C in

[0023] In the figure: 100 - aluminum plate stretching head, 110 - clamping and stretching unit, 200 - clamp, 300 - resisting device, 310 - resisting beam, 311 - fixing block, 312 - slider, 313 - side sliding plate, 314 - end sliding plate, 315 - guiding sliding plate, 320 - actuating plate, 330 - locking connection part, 331 - compression spring, 332 - rod body, 333 - nut, 334 - baffle, 335 - sealing plate, 336 - washer, 400 - proximity switch, 500 - translation driving part, 510 - locking pin, 600 - guiding component, 610 - sliding groove, 700 - mounting bracket. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present invention belong to the scope protected by the present invention.

[0025] Embodiment 1: As Figures 1-7As shown in the figure, the aluminum plate stretcher provided in this embodiment includes a movable stretching head and a fixed stretching head. Both the movable stretching head and the fixed stretching head are provided with jaws and a clamp 200 located in the jaws. A resisting device 300 is also provided in the jaws of the movable stretching head and the fixed stretching head. The resisting device 300 is located behind the corresponding clamp 200, and the resisting device 300 is used to abut against the aluminum plate entering the jaws. An induction part is also provided on the resisting device 300, and the induction part is used to sense whether the aluminum plate is tightly abutted against the resisting device 300. Specifically, when the aluminum plate is tightly abutted against the resisting device 300, the induction part emits an induction signal, and when the aluminum plate is not tightly abutted against the resisting device 300, the induction part does not emit an induction signal.

[0026] It should be noted that the structures of the movable stretching head and the fixed stretching head are the same, the installation methods of the clamp 200 in the corresponding stretching heads are also the same, and the installation methods of the resisting device 300 on the corresponding stretching heads are also the same. To simplify the description and make the explanation clearer, in this embodiment, both the movable stretching head and the fixed stretching head are referred to as the aluminum plate stretching head 100. Furthermore, both the movable stretching head and the fixed stretching head are composed of a plurality of clamping and stretching units 110 arranged side by side. Each clamping and stretching unit 110 has a sub-jaw. The plurality of sub-jaws are arranged side by side and communicate to form the above-mentioned jaws. Each clamping and stretching unit 110 is provided with a clamp 200 located in the sub-jaw. The above-mentioned resisting device 300 straddles the sub-jaws of all the clamping and stretching units 110. Also, the "rear" of the above-mentioned corresponding clamp 200 refers to the direction relative to the direction in which the aluminum plate enters the jaws. "Rear" can be understood as that the aluminum plate first passes through the clamping position of the clamp 200 in the jaws and then abuts against the resisting device 300. Of course, this aluminum plate stretcher also includes a driving mechanism for driving the clamp 200 to clamp and loosen and other components. Such components are not the improvement points of this patent, so no detailed introduction will be made.

[0027] During use, first lift the aluminum plate to the position between the movable stretching head and the fixed stretching head, and then drive the movable stretching head to move towards the fixed stretching head, so that one end of the aluminum plate enters the jaws of the movable stretching head. Since the above-mentioned resisting device 300 is located behind the clamp 200 inside the jaws, one end of the aluminum plate will first pass through the clamping position of the clamp 200 inside the movable stretching head. Whether one end of the aluminum plate is tightly pressed against the resisting device 300 inside the movable stretching head or not, the movable stretching head keeps moving at a constant speed. Because the aluminum plate is tightly pressed against the resisting device 300 inside the movable stretching head or frictioned with the clamp 200, the movable stretching head will push the aluminum plate to move synchronously towards the fixed stretching head, so that the other end of the aluminum plate enters the jaws of the fixed stretching head and abuts against the resisting device 300 inside the fixed stretching head. When the other end of the aluminum plate is tightly pressed against the resisting device 300 inside the fixed stretching head, the sensing part inside the fixed stretching head emits a sensing signal. And when the sensing parts inside both the movable stretching head and the fixed stretching head emit sensing signals, drive the movable stretching head to stop moving, and drive the clamp 200 inside the movable stretching head and the clamp 200 inside the fixed stretching head to clamp the aluminum plate simultaneously.

[0028] With the above structure, regardless of whether there are warping and shrugging phenomena in the aluminum plate, only when the end of the aluminum plate enters the jaws and is tightly pressed against the resisting device 300, the corresponding sensing part will emit a sensing signal. And only when the sensing parts inside both the movable stretching head and the fixed stretching head emit sensing signals, will the movable stretching head be driven to stop moving and the clamp 200 inside the movable stretching head and the clamp 200 inside the fixed stretching head be driven to clamp the aluminum plate simultaneously. When the two ends of the aluminum plate are respectively tightly pressed against the resisting device 300 inside the movable stretching head and the resisting device 300 inside the fixed stretching head, the aluminum plate is tightly pressed between the resisting devices 300 at both ends. At this time, the aluminum plate can no longer displace relative to the clamp 200, that is, in this case, the position of the clamp 200 relative to the aluminum plate is fixed, and the clamping position of the clamp 200 on the aluminum plate is also fixed, so that the aluminum plate can be accurately positioned between the movable stretching head and the fixed stretching head. In addition, during the whole process, the movable stretching head will only stop when the sensing parts inside it and the sensing part inside the fixed stretching head both emit sensing signals, that is, the movable stretching head does not need to stop during the whole process to wait for the clamp 200 inside it to clamp the aluminum plate, so that the positioning and clamping time of the aluminum plate on the aluminum plate stretching machine can be shortened.

[0029] An optional implementation manner of this embodiment is as follows. The above-mentioned resisting device 300 includes a resisting beam 310, a pushing plate 320 and a locking connection part, where: The resisting beam 310 is arranged in the above-mentioned jaws. The actuating plate 320 is slidably mounted on the resisting beam 310. The actuating plate 320 is used to abut against the aluminum plate. In fact, the actuating plate 320 is located in front of the resisting beam 310, that is, after the aluminum plate passes through the clamping position of the clamp 200, it will contact the actuating plate 320. The above-mentioned sensing part is arranged between the resisting beam 310 and the actuating plate 320. When the aluminum plate does not abut against the actuating plate 320, there is a gap between the actuating plate 320 and the resisting beam 310. Define this gap as gap a (specifically as Figure 6 and Figure 7 shown), the above-mentioned sensing part will not emit a signal. When the aluminum plate abuts against the actuating plate 320 and pushes the actuating plate 320 to move towards the resisting beam 310 until the distance between the actuating plate 320 and the resisting beam 310 is the smallest (or the actuating plate 320 is in contact with the resisting beam 310), the above-mentioned sensing part emits a sensing signal.

[0030] Since the actuating plate 320 is slidably mounted on the resisting beam 310, without the locking connection part, when the moving stretching head drives the resisting beam 310 to move at the same speed and in the same direction, the above-mentioned actuating plate 320 will slide relative to the resisting beam 310, and in this case, it will not work. Therefore, the actuating plate 320 is connected to the resisting beam 310 through the above-mentioned locking connection part. When the aluminum plate does not abut against the actuating plate 320, the above-mentioned locking connection part locks the actuating plate 320 to the above-mentioned resisting beam 310, so that the actuating plate 320 can move at the same speed and in the same direction as the moving stretching head along with the resisting beam 310. When the aluminum plate abuts against the actuating plate 320, the above-mentioned locking connection part is unlocked. In this case, the above-mentioned actuating plate 320 can slide on the resisting beam 310.

[0031] With the blocking device 300 in the above form, when the aluminum plate is not in contact with the abutting plate 320, the locking connection part is locked. When the moving stretching head moves towards the fixed stretching head, the blocking beam 310 and the abutting plate 320 will move towards the fixed stretching head at the same speed and in the same direction, so that one end of the aluminum plate enters the jaws of the moving stretching head and contacts the abutting plate 320. At the moment when the aluminum plate contacts the abutting plate 320, the above-mentioned locking connection part is unlocked, so that the abutting plate 320 can slide relative to the blocking beam 310. When the moving stretching head continues to move forward, the aluminum plate will push the abutting plate 320 towards the blocking beam 310 until the abutting plate 320 moves to the minimum distance from the blocking beam 310 or abuts against the blocking beam 310. At this time, the abutting plate 320 can no longer move, and at this time, the aluminum plate presses tightly against the blocking device 300 in the moving stretching head. When the moving stretching head moves towards the fixed stretching head thereafter, it will push the aluminum plate to move at the same speed and in the same direction through the blocking device 300. Similarly, when the abutting plate 320 of the blocking device 300 in the fixed stretching head is not in contact with the aluminum plate, its locking connection part is also in a locked state. When the aluminum plate contacts the abutting plate 320 in the fixed stretching head, its locking connection part is unlocked, so that the abutting plate 320 in the fixed stretching head can slide on the corresponding blocking beam 310. In this way, the aluminum plate pushed by the blocking device 300 in the fixed stretching head will contact the abutting plate 320 in the fixed stretching head after entering the jaws of the fixed stretching head, and then push the abutting plate 320 in the fixed stretching head towards the corresponding blocking beam 310 until the abutting plate 320 in the fixed stretching head moves to the minimum distance from the blocking beam 310 in it or abuts against the blocking beam 310 in it. At this time, the abutting plate 320 in the fixed stretching head can no longer approach the corresponding blocking beam 310, thus completing the precise positioning of the aluminum plate.

[0032] Of course, the above-mentioned blocking device 300 can also be a flat plate arranged in the jaws, and the above-mentioned sensing part is arranged on the plate surface of the flat plate. It should be noted that the above-mentioned abutting plate 320 can slide in the jaws. Therefore, there is a certain height gap between the abutting plate 320 and the clamping surface of the clamp 200, and this gap is smaller than the minimum thickness of the aluminum plate, so as to prevent the aluminum plate from entering this gap. Define the gap between the abutting plate 320 and the clamping surface of the clamp 200 as the second gap b (as specifically shown in Figure 4 the figure).

[0033] An alternative implementation of this embodiment is as follows. The locking connection portion includes an elastic connecting member and an adjusting connecting member. Among them, the elastic connecting member is installed between the abutting plate 320 and the resisting beam 310 to elastically connect the abutting plate 320 and the resisting beam 310. The adjusting connecting member is also installed between the abutting plate 320 and the resisting beam 310. In the above structure, both the elastic connecting member and the adjusting connecting member are installed between the abutting plate 320 and the resisting beam 310. In this way, through the action of the abutting plate 320 and the adjusting connecting member, the elastic connecting member is in a compressed state. In this way, the compressed elastic connecting member makes the abutting plate 320 always tend to move towards the side away from the resisting beam 310. When the moving stretching head drives the resisting beam 310 to move towards the fixed stretching head and the aluminum plate is not in contact with the abutting plate 320, the compressed elastic connecting member will exert an elastic force on the abutting plate 320. Therefore, when the resisting beam 310 moves towards the fixed stretching head, the abutting plate 320 cannot slide towards the side close to the resisting beam 310, thereby locking the abutting plate 320 at the front end of the resisting beam 310. When the moving stretching head drives the resisting beam 310 to move towards the fixed stretching head and the aluminum plate is in contact with the abutting plate 320, because the aluminum plate will receive friction from the placing table inside the stretching machine, so when the aluminum plate is in contact with the abutting plate 320, the above-mentioned friction force will push the aluminum plate to be in contact with the abutting plate 320. When the abutting force is greater than the elastic force after the elastic connecting member is compressed, it will cause the aluminum plate to push the abutting plate 320 to move towards the side close to the resisting beam 310, making the abutting plate 320 close to the resisting beam 310. At this time, the locking connection portion is unlocked.

[0034] Specifically, the elastic connecting member is a compression spring 331. Fixing blocks 311 are fixedly provided at both ends of the resisting beam 310. Each fixing block 311 is provided with an installation hole. The compression spring 331 is installed in the installation hole, and both ends of the compression spring 331 respectively abut against the bottom of the installation hole and the above-mentioned actuating plate 320. The adjusting connecting member includes a rod body 332 and a nut 333. One end of the rod body 332 is provided with a baffle 334. The actuating plate 320 is provided with a first through hole, and a second through hole is provided at the bottom of the installation hole. The rod body 332 sequentially passes through the first through hole, the installation hole and the second through hole and is screwed with the nut 333. At this time, the combined action of the nut 333 and the baffle 334 causes the actuating plate 320 to press the above-mentioned compression spring 331. The elastic force after the compression spring 331 is compressed can lock the actuating plate 320 at the front end of the resisting beam 310 when the actuating plate 320 is not in contact with the aluminum plate. The compression spring 331 is sleeved on the above-mentioned rod body 332, so that the compression spring 331 is positioned in the installation hole. Moreover, when the aluminum plate abuts against the actuating plate 320 and the moving stretching head continues to move, after the frictional force received by the aluminum plate in the stretching machine overcomes the elastic force of the above-mentioned compression spring 331, it will drive the actuating plate 320 to unlock and move towards the side close to the resisting beam 310. In addition, in this embodiment, by adjusting the number of turns of the nut 333 screwed on the rod body 332, the compression degree of the above-mentioned compression spring 331 can also be adjusted. Furthermore, when the aluminum plate is released after being stretched, the compression spring 331 can also drive the actuating plate 320 to reset, that is, drive the actuating plate 320 to abut against the above-mentioned baffle 334 again.

[0035] Of course, the above elastic connecting member can also be an air-filled balloon body. Additionally, the above compression spring 331 can also be installed in the middle of the resisting beam 310. In this case, a plurality of the above installation holes need to be evenly opened along the length direction of the resisting beam 310, and each installation hole installs one of the above compression springs 331. Moreover, in this case, the above rod body 332 is welded and fixed to the rear end surface of the above actuating plate 320, and the rod body 332 passes through the resisting beam 310 and is threadedly connected to the nut 333. Furthermore, the above locking connection portion can also be a cylinder or a hydraulic cylinder. The housing of the cylinder or the hydraulic cylinder is installed on the above fixed block 311, and the piston rod of the cylinder or the hydraulic cylinder abuts against the above actuating plate 320. When locking, the piston rod of the cylinder or the hydraulic cylinder extends and maintains pressure, thereby driving the actuating plate 320 to be in a position away from the resisting beam 310. The aluminum plate does not abut against the above actuating plate 320. The cylinder or the hydraulic cylinder maintaining pressure enables the actuating plate 320 to move synchronously with the resisting beam 310 and the stretching head. A pressure switch is provided at the front end of the piston rod of the above cylinder or the hydraulic cylinder. When the aluminum plate abuts against the actuating plate 320 and the aluminum plate applies a thrust on the actuating plate 320, and this thrust is transmitted to the front end of the piston rod of the cylinder or the hydraulic cylinder, it will squeeze the above pressure switch. The pressure switch is electrically connected to the control system of the cylinder or the hydraulic cylinder. The squeezed pressure switch drives the control system to control the cylinder or the hydraulic cylinder to release pressure. The piston rod of the cylinder or the hydraulic cylinder after releasing pressure will be pushed by the actuating plate 320, thereby completing the unlocking.

[0036] The above installation hole in this embodiment can be a blind hole. Optimally, the above installation hole is a through hole penetrating the above fixed block 311. A sealing plate 335 is bolted and fixed at one end of the fixed block 311 away from the actuating plate 320. The sealing plate 335 seals the above through hole. At this time, the above sealing plate 335 constitutes the bottom of the above installation hole, and the above second through hole is opened on the above sealing plate 335. More preferably, an insertion head is provided on the above sealing plate 335. The insertion head is inserted into the above installation hole, and a washer 336 that abuts against the above insertion head is also installed in the installation hole. The above second through hole penetrates the insertion head, and the rod body 332 sequentially passes through the above first through hole, the installation hole, the inner hole of the washer 336, and the above second through hole and is threadedly connected to the nut 333.

[0037] An alternative implementation manner of this embodiment is as follows: The above sensing portion is a proximity switch 400. The proximity switch 400 is installed on the outer wall of the above fixed block 311. A convex plate corresponding to the proximity switch 400 is provided on the outer side wall of the above actuating plate 320. When the actuating plate 320 moves to the closest position to the above resisting beam 310, the above convex plate is closest to the proximity switch 400. At this time, the convex plate causes the proximity switch 400 to act and emit an induction signal. When the actuating plate 320 does not move to the closest position to the resisting beam 310, the convex plate cannot trigger the above proximity switch 400 to act.

[0038] Optionally, the proximity switch 400 described above may also be a microswitch. In this case, when the abutting plate 320 moves to the position closest to the resisting beam 310, the convex plate touches the microswitch.

[0039] An alternative implementation of this embodiment is as follows: The resisting beam 310 is slidably installed in the jaws, and the resisting beam 310 is connected to a translation driving member 500. The translation driving member 500 is used to drive the resisting beam 310 to translate in the jaws to change the distance between the resisting beam 310 and the edge of the jaws.

[0040] In this way, the position of the resisting beam 310 in the jaws is changed by the translation driving member 500, so as to change the distance between the resisting beam 310 and the edge of the jaws, and further change the depth when the end of the aluminum plate abuts against the resisting beam 310 after being inserted into the jaws, so that the aluminum plate stretcher can stretch aluminum plates of different specifications / thicknesses. During actual use, according to the specifications / thickness of the aluminum plate to be stretched, first use the translation driving member 500 to change the position of the resisting beam 310 in the jaws so that the distance between the resisting beam 310 and the edge of the jaws is the depth that the aluminum plate to be stretched needs to enter the jaws, and then use the translation driving member 500 to fix the resisting beam 310 in this position. In this case, before hoisting the aluminum plate between the moving stretching head and the fixed stretching head, it is necessary to first use the translation driving member 500 to change the positions of the resisting beam 310 and the abutting plate 320 in the jaws and lock them with the translation driving member 500, that is, first push the resisting device 300 into the appropriate position in the jaws and lock it. Specifically, push the resisting devices in both the moving stretching head and the fixed stretching head to the appropriate positions in the jaws and lock them; moreover, after the sensing parts in both the moving stretching head and the fixed stretching head emit sensing signals, it is necessary to first use the translation driving member 500 to drive the resisting device 300 to retract, and then drive the clamps 200 in the moving stretching head and the fixed stretching head to clamp the aluminum plate.

[0041] Of course, if the aluminum plate stretcher is only used to stretch aluminum plates of one specification / thickness, the resisting beam 310 can be fixedly arranged in the above-mentioned jaws at this time.

[0042] Optionally, the translation driving member 500 is a hydraulic cylinder. An installation frame 700 is arranged on the outer side wall of the aluminum plate stretching head 100. The translation driving member 500 is installed on the installation frame 700, and the piston rod of the translation driving member 500 is fixed to the fixed block 311 through a locking pin 510.

[0043] An alternative implementation of this embodiment is as follows: Guide members 600 are installed on the inner walls on both the upper and lower sides of the above-mentioned jaws. The guide members 600 are provided with chutes 610. Sliders 312 are provided on both the upper surface and the lower surface at the end of the resisting beam 310. The sliders 312 are slidably installed in the above-mentioned chutes 610. A guiding gap is formed between the guide members 600 on the inner walls on both the upper and lower sides of the jaws. The above-mentioned actuating plate 320 and the above-mentioned resisting beam 310 are both slidably installed in this guiding gap. Through the above method, the resisting beam 310 is slidably installed in the above-mentioned jaws. In order to further reduce friction and extend the service life, a side sliding plate 313 is connected to the side surface of the above-mentioned slider 312. Then, an end sliding plate is connected to the surface of the slider 312 on the side close to the inside of the jaws. Both the side sliding plate 313 and the end sliding plate are copper plates. The side sliding plate 313, the end sliding plate, and the slider 312 are all slidably installed in the above-mentioned chute 610.

[0044] Optionally, first guiding notches are formed on both the outer walls on the upper and lower sides of the actuating plate 320. The above-mentioned slider 312 extends out of the resisting beam 310, and the part of the slider 312 that extends out of the resisting beam 310 is a guiding block. The above-mentioned side sliding plate 313 covers the guiding block. The guiding block is slidably installed in the first guiding notch. A second guiding notch is further formed on the side wall of the first guiding notch. The above-mentioned side sliding plate 313 is slidably installed in the second guiding notch. Specifically, a guiding sliding plate 315 flush with the above-mentioned end sliding plate is connected to the side wall of the above-mentioned guiding block close to the inside of the jaws. The guiding sliding plate 315 is slidably placed in the above-mentioned first guiding notch. The guiding sliding plate 315 can be regarded as a part of the above-mentioned guiding block, so that the actuating plate 320 is slidably installed at the front end of the resisting beam 310.

[0045] Embodiment 2: This embodiment provides an aluminum plate positioning method, which uses the aluminum plate stretching machine provided in Embodiment 1 to position the aluminum plate. That is, this method is used to position the aluminum plate on the aluminum plate stretching machine provided in Embodiment 1. This method includes: Step 1: Hoist the aluminum plate between the moving stretching head and the fixed stretching head of the aluminum plate stretching machine. If the resisting device 300 is slidably installed in the jaws, then before this step, there is also Step 0.5: Use the translation driving member 500 to drive the resisting device 300 into the jaws and move it to a specified position, and use the translation driving member 500 to lock the resisting device 300 in the specified position.

[0046] Step 2: Drive the moving stretching head to move towards the fixed stretching head so that one end of the aluminum plate enters the jaws of the moving stretching head and abuts against the resisting device 300 inside the moving stretching head. When one end of the aluminum plate abuts tightly against the resisting device 300 inside the moving stretching head, the sensing part inside the moving stretching head emits a sensing signal; Step 3: Continue to drive the moving stretching head towards the fixed stretching head. The aluminum plate moves towards the fixed stretching head under the push of the resisting device 300 in the moving stretching head, so that the other end of the aluminum plate enters the jaws of the fixed stretching head and abuts against the resisting device 300 in the fixed stretching head. When the other end of the aluminum plate tightly abuts against the resisting device 300 in the fixed stretching head, the sensing part in the fixed stretching head emits a sensing signal. Step 4: When the sensing parts in both the moving stretching head and the fixed stretching head emit sensing signals, drive the moving stretching head to stop, and drive the clamps 200 of the moving stretching head and the clamps 200 of the fixed stretching head to clamp the aluminum plate simultaneously.

[0047] By this method, regardless of whether there are warping and shrugging phenomena in the aluminum plate, only when the plate end of the aluminum plate enters the jaws and tightly abuts against the resisting device 300, the corresponding sensing part will emit a sensing signal. Moreover, only when the sensing parts in both the moving stretching head and the fixed stretching head emit sensing signals, will the clamps 200 in the moving stretching head and the clamps 200 in the fixed stretching head be driven to clamp the aluminum plate simultaneously. When the two ends of the aluminum plate respectively abut tightly against the resisting device 300 in the moving stretching head and the resisting device 300 in the fixed stretching head, the aluminum plate is tightly held between the resisting devices 300 at both ends. At this time, the aluminum plate can no longer displace relative to the clamps 200, that is, in this case, the position of the clamps 200 relative to the aluminum plate is fixed, and the clamping position of the clamps 200 on the aluminum plate is fixed. In this way, the aluminum plate can be accurately positioned between the moving stretching head and the fixed stretching head. In addition, during the whole process, the moving stretching head will only stop when the sensing parts in both the moving stretching head and the fixed stretching head emit sensing signals, that is, the moving stretching head does not need to stop and wait for the clamps 200 inside it to clamp the aluminum plate during the whole process. In this way, the positioning and clamping time of the aluminum plate on the aluminum plate stretching machine can be shortened.

[0048] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope recorded in the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An aluminum plate stretching machine, characterized in that: The invention comprises a movable stretching head and a fixed stretching head, wherein the movable stretching head and the fixed stretching head are both provided with a jaw and a clamp (200) located in the jaw, and a resisting device (300) is provided in the jaw of the movable stretching head and the fixed stretching head, wherein the resisting device (300) is located behind the clamp (200) and is used to resist an aluminum plate entering the jaw, and a sensing part is also provided on the resisting device (300), wherein the sensing part is used to sense whether the aluminum plate is tightly abutted against the resisting device (300); When the two end plate ends of the aluminum plate are respectively pressed against the resisting device (300) in the movable stretching head and the resisting device (300) in the fixed stretching head, the clamp (200) of the movable stretching head and the clamp (200) in the fixed stretching head clamp the aluminum plate at the same time.

2. The aluminum sheet stretching machine according to claim 1, characterized in that: The resisting device (300) comprises: A retaining beam (310) is disposed in the jaws; An abutment plate (320) is slidably mounted on the abutment beam (310), and the abutment plate (320) is used to abut against the aluminum plate; A locking connection part (330) is connected between the retaining beam (310) and the retaining plate (320); when the aluminum plate is not in contact with the retaining plate (320), the retaining plate is locked to the retaining beam through the locking connection part; when the aluminum plate is in contact with the retaining plate (320), the locking connection part (330) is unlocked; The sensing portion is arranged between the retaining beam (310) and the retaining plate (320).

3. The aluminum sheet stretching machine according to claim 2, characterized in that: The locking connection portion (330) comprises: An elastic connecting member is installed between the abutting plate (320) and the abutting beam (310) so as to elastically connect the abutting plate (320) and the abutting beam (310); The adjusting connecting member is installed between the abutting plate (320) and the blocking beam (310), and the elastic connecting member is in a compressed state under the action of the adjusting connecting member.

4. The aluminum sheet stretching machine according to claim 3, characterized in that: The elastic connecting member is a compression spring (331), and a fixing block (311) is fixedly provided at both ends of the resisting beam (310), and each fixing block (311) is provided with a mounting hole, and the compression spring (331) is mounted in the mounting hole, and the two ends of the compression spring (331) are respectively in contact with the bottom of the mounting hole and the resisting plate (320); The adjusting connecting member comprises a rod body (332) and a nut (333); a baffle (334) is provided at one end of the rod body (332); a first through hole is provided on the abutting plate (320); a second through hole is provided at the bottom of the mounting hole; the rod body (332) passes through the first through hole, the mounting hole and the second through hole in sequence and is then screwed to the nut (333); and the compression spring (331) is sleeved on the rod body (332).

5. The aluminum sheet stretching machine according to claim 4, characterized in that: The mounting hole is a through hole, and one end of the fixing block (311) away from the abutting plate (320) is bolted and fixed with a sealing plate (335) covering the through hole, the sealing plate (335) forming the bottom of the mounting hole, and the second through hole is opened in the sealing plate (335).

6. The aluminum sheet stretching machine according to claim 4, characterized in that: The sensing part is a proximity switch (400), and the proximity switch (400) is installed on the outer wall of the fixing block (311); When the aluminum plate and the resisting device (300) are pressed tightly against each other, the resisting plate (320) moves to the position closest to the proximity switch (400) to trigger the proximity switch (400).

7. The aluminum sheet stretching machine according to any one of claims 2 to 6, characterized in that: The retaining beam (310) is slidably installed in the jaws, and the retaining beam (310) is connected to a translation drive (500), wherein the translation drive (500) is used to drive the retaining beam (310) to translate in the jaws to change the distance between the retaining beam (310) and the edge of the jaws.

8. The aluminum sheet stretching machine according to claim 7, characterized in that: A guide member (600) is installed on both the upper and lower inner walls of the jaws, the guide member (600) is provided with a slide groove (610), the upper and lower surfaces of the end of the retaining beam (310) are provided with a slider (312), and the slider (312) and the retaining beam (310) are slidably installed in the slide groove (610); A guide gap is formed between the guide components (600) on the inner walls of the upper and lower sides of the jaws, and the abutment plate (320) is slidably installed in the guide gap.

9. The aluminum sheet stretching machine according to claim 8, characterized in that: The upper and lower outer walls of the movable plate (320) are both provided with first guide notches, the slider (312) extends out of the retaining beam (310), and the portion of the slider (312) extending out of the retaining beam (310) is a guide block, the guide block is slidably installed in the first guide notch, and a second guide notch is also provided on the side wall of the first guide notch, a side slide plate (313) covering the guide block is installed on the outer side wall of the slider (312), the side slide plate (313) is slidably installed in the second guide notch, and the side slide plate (313) is also slidably installed in the slide groove (610) on the guide member (600).

10. A method for positioning an aluminum plate, characterized in that: Using the aluminum sheet stretching machine as described in any one of claims 1 to 9 to position the aluminum sheet, comprising: Step 1: Lift the aluminum plate between the mobile stretching head and the fixed stretching head of the aluminum plate stretching machine; Step 2: driving the movable stretching head to move toward the fixed stretching head, so that one end of the aluminum plate enters the jaws of the movable stretching head and abuts against the resisting device (300) in the movable stretching head. When one end of the aluminum plate abuts against the resisting device (300) in the movable stretching head, the sensing part in the movable stretching head sends a sensing signal. During this process, the movable stretching head keeps moving. Step 3: The aluminum plate moves toward the fixed stretching head under the push of the resisting device (300) in the movable stretching head, so that the other end of the aluminum plate enters the jaws of the fixed stretching head and abuts against the resisting device (300) in the fixed stretching head. When the other end of the aluminum plate abuts against the resisting device (300) in the fixed stretching head, the sensing part in the fixed stretching head sends out a sensing signal; Step 4: When the sensing part in the movable stretching head and the sensing part in the fixed stretching head both send out sensing signals, the movable stretching head is driven to stop moving, and the clamp (200) of the movable stretching head and the clamp (200) of the fixed stretching head are driven to clamp the aluminum plate at the same time.

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