Aluminum plate stretching machine and aluminum plate positioning method

Abstract

The present invention relates to an aluminum plate stretching machine and an aluminum plate positioning method, belonging to the technical field of plate stretching machines. The aluminum plate stretching machine 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 clamps located in the jaws. A resisting device is provided in the jaws of the movable stretching head and the fixed stretching head. The resisting device is used to abut the aluminum plate entering the jaws. The resisting device is also provided with a sensing part, which 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 clamps of the movable stretching head and the clamps in the fixed stretching head simultaneously clamp the aluminum plate. The above method is used to position the aluminum plate on the above-mentioned aluminum plate stretching machine. In this way, the aluminum plate can be positioned more accurately in the aluminum plate stretching machine, so that the aluminum plate can be better clamped on the aluminum plate stretching machine, and the time spent on positioning and clamping the aluminum plate is less.

Description

Technical Field

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

[0002] In the prior art, aluminum sheet stretching machines are equipped with a fixed stretching head and a movable stretching head. Each stretching head is equipped with jaws, each of which contains clamps. When the aluminum sheet enters the jaws and is placed between the clamps, a push rod pushes the clamps to clamp the aluminum sheet. To achieve uniform clamping force and ensure the stretching effect, the clamp's clamping position on the aluminum sheet is extremely important. Therefore, the depth of the aluminum sheet entering the jaws must be strictly controlled. Currently, both the fixed stretching head and the movable stretching head are equipped with photoelectric switches. The depth of the aluminum sheet entering the jaws is controlled by these photoelectric switches and the displacement parameters set in the control system.

[0003] For example, in the aluminum plate stretching requirement, the clamping position of the clamp is 500mm close to the plate end, so the displacement parameter set in the control system is 500mm.

[0004] When the aluminum plate is lifted between the mobile stretching head and the fixed stretching head by the lifting equipment, the control system controls the mobile stretching head to start moving toward the side close to the fixed stretching head until the photoelectric switch on the mobile stretching head senses one end of the aluminum plate. At this time, the control system is defined as the first initial state and controls the mobile stretching head to continue moving toward the fixed stretching head. When the mobile stretching head continues to move to a stroke of 500mm, the control system controls the mobile stretching head to stop and drives the clamp on the mobile stretching head to clamp the aluminum plate. At this time, it is determined that the depth of the aluminum plate entering the jaws of the mobile stretching head is 500mm, that is, the clamp on the mobile stretching head is clamped at a position 500mm away from one 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 again and continue to move toward the fixed stretching head, thereby pushing the aluminum plate toward the fixed stretching head. When the aluminum plate moves to the jaws about to enter the fixed stretching head, the photoelectric switch on the fixed stretching head senses the other end of the aluminum plate (it should be noted that 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 is defined as the second initial state and controls the movable stretching head to continue to move toward the fixed stretching head. When the movable stretching head continues to move to a stroke of 500mm 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 of the aluminum plate entering the fixed stretching head is 500mm, that is, the clamp on the fixed stretching head is clamped at a position 500mm away from the other end of the aluminum plate.

[0006] The current aluminum plate stretching machine generally uses the above method to position the aluminum plate, but there are the following problems:

[0007] 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 end enters the jaws of the moving stretching head, it is very likely to contact the clamping surface of the clamp and generate friction. In this case, the above friction is very likely to drive the aluminum plate to move with the moving stretching head, and eventually cause the clamp of the moving stretching head to clamp before the depth of the aluminum plate entering the jaws of the moving stretching head reaches the above displacement parameter, resulting in the clamping length of the clamp of the moving stretching head on the aluminum plate being too short, which exponentially increases the clamp stress and increases the equipment failure rate;

[0008] 2. Because the movable stretching head has a large inertia from movement to stop, for aluminum plates that are 100% flat, the clamps on the movable 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 when the movable stretching head stops completely, the end of the aluminum plate has entered the jaws of both the movable stretching head and the fixed stretching head by 510mm. This situation will also cause the clamping length of the movable stretching head clamp on the aluminum plate to be too long, reducing the yield rate;

[0009] 3. During the entire 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 the fixed stretching head clamp then 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

[0010] 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.

[0011] The present invention is achieved through the following technical solutions: an aluminum plate stretching machine, comprising a movable stretching head and a fixed stretching head, wherein the movable stretching head and the fixed stretching head are both provided with jaws and clamps located in the jaws, and a resisting device is provided in the jaws of the movable stretching head and the fixed stretching head, wherein the resisting device is located behind the clamps and is used to resist the aluminum plate entering the jaws, and the resisting device is further provided with a sensing portion, wherein the sensing portion is used to sense whether the aluminum plate is tightly abutted against the resisting device;

[0012] When both 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.

[0013] Furthermore, in order to better implement the present invention, the resisting device includes:

[0014] a resisting beam disposed in the jaws;

[0015] an abutting plate, slidably mounted on the abutting beam, the abutting plate being used to abut against the aluminum plate;

[0016] a locking connection portion connected between the retaining beam and the retaining plate, wherein when the aluminum plate is not in contact with the retaining plate, the retaining plate is locked to the retaining beam through the locking connection portion, and when the aluminum plate is in contact with the retaining plate, the locking connection portion is unlocked;

[0017] The sensing portion is arranged between the retaining beam and the retaining plate.

[0018] Furthermore, in order to better implement the present invention, the locking connection portion includes:

[0019] an elastic connecting member installed between the abutting plate and the abutting beam so as to elastically connect the abutting plate and the abutting beam;

[0020] The adjusting connecting member is installed between the abutting plate and the blocking beam, and the elastic connecting member is in a compressed state under the action of the adjusting connecting member.

[0021] Furthermore, in order to better implement the present invention, the elastic connecting member is a compression spring, and a fixing block is fixedly provided at both ends of the resisting beam, each fixing block is provided with a mounting hole, the compression spring is mounted in the mounting hole, and the two ends of the compression spring are respectively in contact with the bottom of the mounting hole and the resisting plate;

[0022] The adjusting connecting member includes a rod body and a nut, a baffle is provided at one end of the rod body, a first through hole is provided on the abutting plate, a second through hole is provided at the bottom of the mounting hole, the rod body passes through the first through hole, the mounting hole and the second through hole in sequence and is screwed to the nut, and the compression spring is sleeved on the rod body.

[0023] Furthermore, in order to better implement the present invention, the mounting hole is a through hole, and the end of the fixing block away from the abutment plate is bolted and fixed with a sealing plate covering the through hole, the sealing plate constitutes the bottom of the mounting hole, and the second through hole is opened in the sealing plate.

[0024] Furthermore, in order to better implement the present invention, the sensing portion is a proximity switch, and the proximity switch is mounted on the outer wall of the fixing block;

[0025] When the aluminum plate is pressed against the resisting device, the resisting plate moves to the position closest to the proximity switch to trigger the proximity switch.

[0026] Furthermore, in order to better realize the present invention, the retaining beam is slidably installed in the jaws, and the retaining beam is connected to a translation drive member, which is used to drive the retaining beam to translate in the jaws to change the distance between the retaining beam and the edge of the jaws.

[0027] Furthermore, in order to better implement the present invention, guide members are installed on the upper and lower inner walls of the jaws, the guide members are provided with slide grooves, and the upper and lower surfaces of the end of the resisting beam are provided with sliders, and the sliders are slidably installed in the slide grooves;

[0028] A guide gap is formed between the guide members on the upper and lower inner walls of the jaws, and the abutting plate is slidably installed in the guide gap.

[0029] Furthermore, in order to better realize the present invention, a first guide notch is provided on the upper and lower outer walls of the retaining plate, the slider extends out of the retaining beam, and the slider portion extending out of the retaining beam is a guide block, and 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, and a side slide covering the guide block is installed on the outer side wall of the slider, the side slide is slidably installed in the second guide notch, and the side slide is also slidably installed in the slide groove on the guide member.

[0030] The aluminum plate positioning method provided by the present invention uses the above-mentioned aluminum plate stretching machine to position the aluminum plate, comprising:

[0031] Step 1: Lift the aluminum plate between the movable stretching head and the fixed stretching head of the aluminum plate stretching machine;

[0032] Step 2: driving the movable stretching head 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 the 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.

[0033] Step 3: The aluminum plate moves toward the fixed stretching head under the push of the resisting device 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 in the fixed stretching head. When the other end of the aluminum plate abuts against the resisting device in the fixed stretching head, the sensing part in the fixed stretching head sends a sensing signal;

[0034] 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 of the movable stretching head and the clamp of the fixed stretching head are driven to clamp the aluminum plate at the same time.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The aluminum plate stretching machine provided by the present invention includes a movable stretching head and a fixed stretching head. The movable stretching head and the fixed stretching head are both provided with jaws and clamps located in the jaws. A resisting device is also provided in the jaws of the movable stretching head and the fixed stretching head. The resisting device is located behind the corresponding clamp, and the resisting device is used to abut the aluminum plate entering the jaws. The resisting device is also provided with a sensing part, which is used to sense whether the aluminum plate is tightly against the resisting device.

[0037] When in use, the aluminum plate is first lifted between the movable stretching head and the fixed stretching head, and then the movable stretching head is driven to move toward the fixed stretching head so that one end of the aluminum plate enters the jaws of the movable stretching head. Because the above-mentioned supporting 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. Regardless of whether one end of the aluminum plate is pressed against the supporting device in the movable stretching head, the movable stretching head keeps moving at a constant speed. Since the aluminum plate is pressed against the supporting device in the movable stretching head or rubs against the clamp, the movable stretching head will push the aluminum plate to move synchronously toward 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 supporting device in the fixed stretching head. When the other end of the aluminum plate is pressed against the supporting device in the fixed stretching head, the sensing part in the fixed stretching head sends a sensing signal. When the sensing part in the movable stretching head and the sensing part in the fixed stretching head both send sensing signals, the movable stretching head is driven to stop moving, and the clamp in the movable stretching head and the clamp in the fixed stretching head are driven to clamp the aluminum plate at the same time.

[0038] Through the above structure, no matter whether the aluminum plate has warping or bulging phenomenon, only when the plate end of the aluminum plate enters the jaws and is pressed against the supporting device, the corresponding sensing part will send out a sensing signal, and only when the sensing part in the movable stretching head and the sensing part in the fixed stretching head both send out sensing signals, will the movable stretching head be driven to stop moving and the clamp in the movable stretching head and the clamp in the fixed stretching head be driven to clamp the aluminum plate at the same time, and when the two ends of the aluminum plate are respectively pressed against the supporting device in the movable stretching head and the supporting device in the fixed stretching head, the aluminum plate is pressed between the supporting devices at both ends, and at this time, the aluminum plate can no longer be displaced 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, so that the aluminum plate can be accurately positioned between the movable stretching head and the fixed stretching head. In addition, during the entire process, the moving stretching head will only stop when the sensing part inside the moving stretching head and the sensing part inside the fixed stretching head both send out sensing signals. That is, the moving stretching head does not need to stop during the entire process to wait for the clamp inside it to clamp the aluminum plate. This can shorten the positioning and clamping time of the aluminum plate on the aluminum plate stretching machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 1 is a schematic structural diagram of a resisting device provided by an embodiment of the present invention;

[0041] Figure 2 yes Figure 1 A local enlarged view of area A;

[0042] Figure 3 This is a schematic diagram of the main structure of the aluminum plate stretching head equipped with a resisting device in an embodiment of the present invention;

[0043] Figure 4 2 is a schematic structural diagram of a case where a movable plate of a resisting device in an embodiment of the present invention is placed inside a clamping position of a clamp;

[0044] Figure 5 1 is a schematic top view of the structure of an aluminum plate stretching head equipped with a resisting device according to an embodiment of the present invention;

[0045] Figure 6 yes Figure 5 A local enlarged view of area B in FIG;

[0046] Figure 7 yes Figure 5 A local enlarged view of area C in FIG.

[0047] In the picture:

[0048] 100-aluminum plate stretching head, 110-clamping stretching unit, 200-clamp, 300-resistance device, 310-resistance beam, 311-fixed block, 312-slider, 313-side slide, 314-end slide, 315-guide slide, 320-resistance plate, 330-locking connection, 331-compression spring, 332-rod, 333-nut, 334-baffle, 335-sealing plate, 336-washer, 400-proximity switch, 500-translational drive member, 510-locking pin, 600-guide member, 610-slide groove, 700-mounting frame. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0050] Example 1:

[0051] like Figure 1-Figure 7 As shown, the aluminum plate stretching machine provided in this embodiment includes a movable stretching head and a fixed stretching head. The movable stretching head and the fixed stretching head are both 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 the aluminum plate entering the jaws. A sensing part is also provided on the resisting device 300. The sensing part is used to sense whether the aluminum plate is tightly against the resisting device 300. Specifically, when the aluminum plate is tightly against the resisting device 300, the sensing part sends a sensing signal, and when the aluminum plate is not tightly against the resisting device 300, the sensing part does not send a sensing signal.

[0052] It should be noted that the movable stretching head and the fixed stretching head have the same structure, the clamps 200 are installed in the same manner within the corresponding stretching heads, and the retaining device 300 is installed in the same manner within the corresponding stretching heads. To simplify the description and provide a clearer explanation, in this embodiment, the movable stretching head and the fixed stretching head are both 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, and the multiple sub-jaws are arranged side by side and connected to form the above-mentioned jaw. Each clamping and stretching unit 110 is provided with a clamp 200 located in the sub-jaw, and the retaining device 300 spans the sub-jaws of all clamping and stretching units 110. In addition, the rear of the corresponding clamp 200 refers to the direction relative to the direction in which the aluminum plate enters the jaw. "Rear" can be understood as the aluminum plate first passes through the clamping position of the clamp 200 within the jaw before abutting against the retaining device 300. Of course, the aluminum plate stretching machine also includes a driving mechanism for driving the clamp 200 to clamp and release and other components. Such components are not the improvement points of this patent, so they will not be introduced in detail.

[0053] When in use, the aluminum plate is first hoisted between the mobile stretching head and the fixed stretching head, and then the mobile stretching head is driven to move toward the fixed stretching head so that one end of the aluminum plate enters the jaws of the mobile stretching head. Because the above-mentioned resisting device 300 is located behind the clamp 200 in the jaws, one end of the aluminum plate will first pass through the clamping position of the clamp 200 in the mobile stretching head. Regardless of whether one end of the aluminum plate is pressed against the resisting device 300 in the mobile stretching head, the mobile stretching head keeps moving at a constant speed. Since the aluminum plate is pressed against the resisting device 300 in the mobile stretching head or against the clamp 200, Friction, so the movable stretching head will push the aluminum plate to move synchronously toward 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 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 a sensing signal. When the sensing part in the movable stretching head and the sensing part in the fixed stretching head both send sensing signals, the movable stretching head is driven to stop moving, and the clamp 200 in the movable stretching head and the clamp 200 in the fixed stretching head are driven to clamp the aluminum plate at the same time.

[0054] Through the above structure, no matter whether the aluminum plate has warping or bulging phenomenon, only when the plate end of the aluminum plate enters the jaws and presses against the resisting device 300, the corresponding sensing part will send out a sensing signal, and only when the sensing part in the movable stretching head and the sensing part in the fixed stretching head both send out sensing signals, will the movable stretching head be driven to stop moving and the clamp 200 in the movable stretching head and the clamp 200 in the fixed stretching head be driven to clamp the aluminum plate at the same time, and when the two ends of the aluminum plate press against the resisting device 300 in the movable stretching head and the resisting device 300 in the fixed stretching head respectively, the aluminum plate is pressed between the resisting devices 300 at both ends, and at this time, the aluminum plate can no longer be displaced 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 entire process, the movable stretching head will only stop when the sensing part inside it and the sensing part inside the fixed stretching head both send out sensing signals, that is, the movable stretching head does not need to stop during the entire process to wait for the clamp 200 inside it to clamp the aluminum plate, which can shorten the positioning and clamping time of the aluminum plate on the aluminum plate stretching machine.

[0055] An optional implementation of this embodiment is as follows: the above-mentioned blocking device 300 includes a blocking beam 310, a blocking plate 320 and a locking connection portion, wherein:

[0056] The abutting beam 310 is set in the above-mentioned jaws, and the abutting plate 320 is slidably installed on the abutting beam 310. The abutting plate 320 is used to abut against the aluminum plate. In fact, the abutting plate 320 is located in front of the abutting beam 310, that is, the aluminum plate will contact the abutting plate 320 after passing through the clamping position of the clamp 200. The above-mentioned sensing part is set between the abutting beam 310 and the abutting plate 320. When the aluminum plate does not abut against the abutting plate 320, there is a gap between the abutting plate 320 and the abutting beam 310, and the gap is defined as gap a (specifically, Figure 6 and Figure 7 As shown), the above-mentioned sensing part will not send out a signal. When the aluminum plate abuts against the abutting plate 320 and pushes the abutting plate 320 toward the abutting beam 310 until the distance with the abutting beam 310 is minimum (or the abutting plate 320 is in contact with the abutting beam 310), the above-mentioned sensing part sends out a sensing signal.

[0057] Because the abutment plate 320 is slidably installed on the abutment beam 310, if there is no locking connection part, then when the moving stretching head drives the abutment beam 310 to move at the same speed and in the same direction, the above-mentioned abutment plate 320 will slide relative to the abutment beam 310, and it will not be effective at this time. For this reason, the abutment plate 320 is connected to the abutment beam 310 through the above-mentioned locking connection part. When the aluminum plate does not abut against the abutment plate 320, the above-mentioned locking connection part locks the abutment plate 320 to the above-mentioned abutment beam 310, so that the abutment plate 320 can move with the abutment beam 310 at the same speed and in the same direction as the moving stretching head. When the aluminum plate abuts against the abutment plate 320, the above-mentioned locking connection part is unlocked. In this case, the above-mentioned abutment plate 320 can slide on the abutment beam 310.

[0058] When the cam 320 is in contact with the stop plate 310, the stop plate 320 is locked and the stop plate 320 is in contact with the stop plate 310. When the movable stretching head moves toward the fixed stretching head again, the aluminum plate will be pushed to move at the same speed and in the same direction through the resisting device 300. When the aluminum plate is in contact with the abutment plate 320 in the fixed stretching head, the locking connection part thereof is also in a locked state. When the aluminum plate is in contact with the abutment plate 320 in the fixed stretching head, the locking connection part thereof is unlocked, so that the abutment plate 320 in the fixed stretching head can slide on the corresponding abutment beam 310. In this way, the aluminum plate pushed by the abutment device 300 in the fixed stretching head will contact the abutment plate 320 in the fixed stretching head after entering the jaws of the fixed stretching head, and then push the abutment plate 320 in the fixed stretching head toward the corresponding abutment beam 310 until the abutment plate 320 in the fixed stretching head moves to the minimum distance from the abutment beam 310 therein or is in contact with the abutment beam 310 therein. At this time, the abutment plate 320 in the fixed stretching head can no longer approach the corresponding abutment beam 310, thereby completing the precise positioning of the aluminum plate.

[0059] Of course, the above-mentioned resisting 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 is worth noting that the above-mentioned resisting plate 320 can slide in the jaws. Therefore, there is a gap of a certain height between the above-mentioned resisting plate 320 and the clamping surface of the clamp 200. The gap is less than the minimum thickness of the aluminum plate, thereby preventing the aluminum plate from entering the gap. The gap between the resisting plate 320 and the clamping surface of the clamp 200 is defined as the second gap b (specifically, Figure 4 shown).

[0060] An optional implementation of this embodiment is as follows, the above-mentioned locking connection part includes an elastic connection member and an adjustment connection member, wherein the elastic connection member is installed between the abutting plate 320 and the abutting beam 310 to elastically connect the abutting plate 320 to the abutting beam 310, and the adjustment connection member is also installed between the abutting plate 320 and the abutting beam 310. In the above structure, the elastic connection member and the adjustment connection member are both installed between the abutting plate 320 and the abutting beam 310. In this way, through the action of the abutting plate 320 and the adjustment connection member, the elastic connection member is in a compressed state. In this way, the compressed elastic connection member makes the abutting plate 320 always have a tendency to move toward the side away from the abutting beam 310. When the movable stretching head drives the retaining beam 310 to move toward the fixed stretching head and the aluminum plate does not abut against the retaining plate 320, the compressed elastic connecting piece will exert elastic force on the retaining plate 320. Therefore, when the retaining beam 310 moves toward the fixed stretching head, the retaining plate 320 cannot slide toward the side close to the retaining beam 310, thereby locking the retaining plate 320 at the front end of the retaining beam 310. When abutting against the abutting plate 320, the aluminum plate will receive friction from the placement table inside the stretching machine. Therefore, when the aluminum plate abuts against the abutting plate 320, the above friction will push the aluminum plate to abut against the abutting plate 320. When the abutting force is greater than the elastic force after the elastic connecting part is compressed, the aluminum plate will push the abutting plate 320 toward the side close to the abutting beam 310, so that the abutting plate 320 is close to the abutting beam 310, and the locking connection part is unlocked at this time.

[0061] Specifically, the elastic connecting member is a compression spring 331. A fixing block 311 is fixed at both ends of the resisting beam 310. Each fixing block 311 has a mounting hole. The compression spring 331 is installed 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 above-mentioned resisting plate 320. The above-mentioned adjusting connecting member includes a rod body 332 and a nut 333. A baffle 334 is provided at one end of the rod body 332. The resisting plate 320 has a first through hole, and a second through hole is provided at the bottom of the above-mentioned mounting hole. The above-mentioned rod body 332 passes through the first through hole, the mounting hole and the second through hole in sequence and then engages with the nut 333. When the aluminum plate is screwed together, the combined action of the nut 333 and the baffle 334 causes the abutment plate 320 to press against the compression spring 331. The elastic force of the compressed compression spring 331 can lock the abutment plate 320 at the front end of the abutment beam 310 when it is not abutting against the aluminum plate. The compression spring 331 is sleeved on the rod 332, thereby positioning the compression spring 331 in the mounting hole. When the aluminum plate abuts the abutment plate 320 and the moving stretching head continues to move, the friction force applied to the aluminum plate within the stretching machine overcomes the elastic force of the compression spring 331, driving the abutment plate 320 to unlock and move toward the side closer to the abutment beam 310. In addition, in this embodiment, the degree of compression of the compression spring 331 can be adjusted by adjusting the number of turns of the nut 333 screwed onto the rod 332. Furthermore, when the aluminum plate is stretched and released, the compression spring 331 can also drive the abutting plate 320 to return to its original position, that is, drive the abutting plate 320 to contact the baffle 334 .

[0062] Of course, the elastic connector can also be an inflatable bag. In addition, the compression spring 331 can also be installed in the middle of the retaining beam 310. In this case, it is necessary to evenly define multiple mounting holes along the length of the retaining beam 310, with one compression spring 331 installed in each mounting hole. In this case, the rod 332 is welded to the rear end plate surface of the retaining plate 320, and the rod 332 passes through the retaining beam 310 and is screwed to the nut 333. Furthermore, the locking connection part can also be a cylinder or a hydraulic cylinder, the outer shell of the cylinder or the hydraulic cylinder is installed on the fixed block 311, and the piston rod of the cylinder or the hydraulic cylinder abuts against the above-mentioned abutment plate 320. When locked, the piston rod of the cylinder or the hydraulic cylinder extends and maintains pressure, thereby driving the abutment plate 320 to a position away from the abutment beam 310, and the aluminum plate does not abut against the above-mentioned abutment plate 320. The cylinder or hydraulic cylinder that maintains pressure enables the abutment plate 320 to move synchronously with the abutment beam 310 and the moving stretching head. A pressure switch is provided at the front end of the piston rod of the above-mentioned cylinder or hydraulic cylinder. When the aluminum plate abuts against the abutment plate 320, the aluminum plate applies thrust on the abutment plate 320. When the thrust is transmitted to the front end of the piston rod of the cylinder or hydraulic cylinder, the above-mentioned pressure switch will be squeezed. The pressure switch is electrically connected to the control system of the cylinder or hydraulic cylinder. The squeezed pressure switch drives the control system to control the cylinder or hydraulic cylinder to relieve pressure. After the pressure is relieved, the piston rod of the cylinder or hydraulic cylinder will be pushed by the abutment plate 320, thereby completing the unlocking.

[0063] The mounting hole in this embodiment can be a blind hole. Optimally, the mounting hole is a through hole that passes through the fixing block 311. A sealing plate 335 is bolted to the end of the fixing block 311 away from the abutting plate 320. The sealing plate 335 blocks the through hole. In this case, the sealing plate 335 forms the bottom of the mounting hole, and the second through hole is formed in the sealing plate 335. More preferably, an insertion head is provided on the sealing plate 335, which is inserted into the mounting hole. A washer 336 is also installed in the mounting hole to abut against the insertion head. The second through hole passes through the insertion head, and the rod 332 passes through the first through hole, the mounting hole, the inner hole of the washer 336, and the second through hole in sequence, and is then screwed to the nut 333.

[0064] An optional implementation of this embodiment is as follows: the above-mentioned sensing part is a proximity switch 400, which is installed on the outer wall of the above-mentioned fixed block 311, and the outer side wall of the above-mentioned abutment plate 320 is provided with a convex plate corresponding to the proximity switch 400. When the abutment plate 320 moves to the closest position to the above-mentioned abutment beam 310, the above-mentioned convex plate is closest to the proximity switch 400. At this time, the convex plate causes the proximity switch 400 to operate and send out a sensing signal. When the abutment plate 320 has not moved to the position closest to the abutment beam 310, the convex plate cannot trigger the above-mentioned proximity switch 400 to operate.

[0065] Optionally, the proximity switch 400 may also be a micro switch. In this case, when the abutting plate 320 moves to the position closest to the blocking beam 310 , the convex plate touches the micro switch.

[0066] An optional implementation of this embodiment is as follows: the above-mentioned retaining beam 310 is slidably installed in the above-mentioned jaws, and the retaining beam 310 is connected to a translation drive member 500, and the above-mentioned translation drive member 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.

[0067] In this way, the position of the support beam 310 in the jaws is changed by the translation drive member 500, thereby changing the distance between the support beam 310 and the edge of the jaws, and then changing the depth of the plate end of the aluminum plate when it is inserted into the jaws and pressed against the support beam 310, so that the aluminum plate stretching machine can stretch aluminum plates of different specifications / thicknesses. During actual use, according to the specifications / thickness of the aluminum plate to be stretched, the translation drive member 500 is first used to change the position of the support beam 310 in the jaws, so that the distance between the support 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 the translation drive member 500 is used to fix the support beam 310 at this position. In this case, before lifting the aluminum plate to the middle of the movable stretching head and the fixed stretching head, it is necessary to first use the translation drive 500 to change the position of the resisting beam 310 and the resisting plate 320 in the jaws, and lock them with the help of the translation drive 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 the movable stretching head and the fixed stretching head to the appropriate position in the jaws and lock them; and, after the sensing part in the movable stretching head and the sensing part in the fixed stretching head both send out sensing signals, it is necessary to first use the translation drive 500 to drive the resisting device 300 to retract, and then drive the clamps 200 in the movable stretching head and the fixed stretching head to clamp the aluminum plate.

[0068] Of course, if the aluminum plate stretching machine is only used to stretch aluminum plates of one specification / thickness, the retaining beam 310 can be fixedly set in the above-mentioned jaws.

[0069] Optionally, the above-mentioned translation drive member 500 is a hydraulic cylinder, and a mounting bracket 700 is provided on the outer wall of the above-mentioned aluminum plate stretching head 100. The translation drive member 500 is installed on the mounting bracket 700, and the piston rod of the translation drive member 500 is fixed to the above-mentioned fixed block 311 through a locking pin 510.

[0070] An optional implementation of this embodiment is as follows: guide members 600 are installed on the upper and lower inner walls of the jaws, and the guide members 600 are provided with a slide groove 610. Sliders 312 are provided on the upper and lower surfaces of the ends of the retaining beam 310. The slides 312 are slidably installed in the above-mentioned slide groove 610, forming a guide gap between the guide members 600 on the upper and lower inner walls of the jaws, and the above-mentioned retaining plate 320 and the above-mentioned retaining beam 310 are both slidably installed in the guide gap. In this way, the retaining beam 310 is slidably installed in the above-mentioned jaws. In order to further reduce friction and extend service life, a side slide 313 is connected to the side of the above-mentioned slide 312, and an end slide is connected to the side surface of the slide 312 near the inside of the jaws. The side slide 313 and the end slide are both made of copper plates. The side slide 313, the end slide and the slide 312 are all slidably installed in the above-mentioned slide groove 610.

[0071] Optionally, a first guide notch is provided on both the upper and lower outer walls of the abutting plate 320. The slider 312 extends out of the abutting beam 310, and the portion of the slider 312 extending out of the abutting beam 310 serves as a guide block. The side slide 313 covers the guide block and is slidably mounted in the first guide notch. A second guide notch is also provided on the side wall of the first guide notch, and the side slide 313 is slidably mounted in the second guide notch. Specifically, a guide slide 315 flush with the end slide is connected to a side wall of the guide block near the jaws. The guide slide 315 is slidably placed in the first guide notch and can be considered part of the guide block, thereby allowing the abutting plate 320 to be slidably mounted on the front end of the abutting beam 310.

[0072] Example 2:

[0073] This embodiment provides a method for positioning an aluminum plate, which uses the aluminum plate stretching machine provided in Example 1 to position the aluminum plate. That is, the method is used to position the aluminum plate on the aluminum plate stretching machine provided in Example 1, and the method includes:

[0074] Step 1: Lift the aluminum sheet between the movable and fixed stretching heads of the aluminum sheet stretching machine. If the retaining device 300 is slidably mounted within the jaws, this step is preceded by step 0.5: Using the translational drive 500 to drive the retaining device 300 into the jaws and into a designated position, and then using the translational drive 500 to lock the retaining device 300 in the designated position.

[0075] Step 2: Drive the movable stretching head 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 emits a sensing signal.

[0076] Step 3: Continue to drive the movable stretching head toward the fixed stretching head. 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 a sensing signal.

[0077] 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, 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.

[0078] By using this method, regardless of whether the aluminum plate has warping or bulging, only when the plate end of the aluminum plate enters the jaws and presses against the resisting device 300, the corresponding sensing part will send out a sensing signal, and only when the sensing part in the movable stretching head and the sensing part in the fixed stretching head both send out sensing signals, will the clamp 200 in the movable stretching head and the clamp 200 in the fixed stretching head be driven to clamp the aluminum plate at the same time, and when the two ends of the aluminum plate press against the resisting device 300 in the movable stretching head and the resisting device 300 in the fixed stretching head respectively, the aluminum plate is pressed between the resisting devices 300 at both ends, and at this time, the aluminum plate can no longer be displaced 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 fixed, so that the aluminum plate can be accurately positioned between the movable stretching head and the fixed stretching head. In addition, during the entire process, the moving stretching head will only stop when the sensing part inside the moving stretching head and the sensing part inside the fixed stretching head both send out sensing signals, that is, the moving stretching head does not need to stop during the entire process to wait for the clamp 200 inside it to clamp the aluminum plate, which can shorten the positioning and clamping time of the aluminum plate on the aluminum plate stretching machine.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection 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 jaws and clamps (200) located in the jaws, and a resisting device (300) is provided in the jaws of the movable stretching head and the fixed stretching head, wherein the resisting device (300) is located behind the clamps (200) and is used to resist the aluminum plate entering the jaws, and the resisting device (300) is also provided with a sensing part, wherein the sensing part is used to sense whether the aluminum plate is tightly abutted against the resisting device (300); When both 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 simultaneously clamp the aluminum plate; The resisting device (300) comprises: a retaining beam (310) disposed in the jaws; An abutting plate (320) is slidably mounted on the abutting beam (310), and the abutting plate (320) is used to abut against the aluminum plate; A locking connection portion (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 via the locking connection portion; when the aluminum plate is in contact with the retaining plate (320), the locking connection portion (330) is unlocked; The sensing portion is arranged between the resisting beam (310) and the resisting plate (320).

2. The aluminum plate stretching machine according to claim 1, characterized in that The locking connection portion (330) comprises: an elastic connecting member 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.

3. The aluminum sheet stretching machine according to claim 2, 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).

4. The aluminum plate stretching machine according to claim 3, characterized in that: The mounting hole is a through hole, and a sealing plate (335) covering the through hole is bolted and fixed to one end of the fixing block (311) away from the abutting plate (320), the sealing plate (335) forming the bottom of the mounting hole, and the second through hole is opened in the sealing plate (335).

5. The aluminum plate stretching machine according to claim 3, 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 together, the resisting plate (320) moves to the position closest to the proximity switch (400) to trigger the proximity switch (400).

6. The aluminum sheet stretching machine according to any one of claims 1 to 5, characterized in that: The retaining beam (310) is slidably mounted in the jaws, and the retaining beam (310) is connected to a translation drive member (500), which 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.

7. The aluminum plate stretching machine according to claim 6, characterized in that: Guide members (600) are installed on both the upper and lower inner walls of the jaws, and the guide members (600) are provided with a slide groove (610). The upper and lower surfaces of the end of the retaining beam (310) are provided with sliders (312), and the sliders (312) and the retaining beam (310) are slidably installed in the slide groove (610); A guide gap is formed between the guide members (600) on the upper and lower inner walls of the jaws, and the abutting plate (320) is slidably installed in the guide gap.

8. The aluminum plate stretching machine according to claim 7, characterized in that: A first guide notch is provided on the upper and lower outer walls of the abutting plate (320), the slider (312) extends out of the abutting beam (310), and the portion of the slider (312) extending out of the abutting beam (310) is a guide block, the guide block is slidably installed in the first guide notch, a second guide notch is also provided on the side wall of the first guide notch, a side slide (313) covering the guide block is installed on the outer side wall of the slider (312), the side slide (313) is slidably installed in the second guide notch, and the side slide (313) is also slidably installed in the slide groove (610) on the guide member (600).

9. A method for positioning an aluminum plate, characterized in that: Positioning an aluminum sheet using the aluminum sheet stretching machine according to any one of claims 1 to 8, comprising: Step 1: Lift the aluminum plate between the movable stretching head and the fixed stretching head of the aluminum plate stretching machine; Step 2: driving the movable stretching head 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 the 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 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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