Clamping device for metal surface treatment

Abstract

The clamping device for metal surface treatment comprises a mounting frame, two lifting mounting plates are movably and longitudinally arranged on a side plate of the mounting frame, an upper positioning seat and a lower positioning seat are arranged on the adjacent sides of the two lifting mounting plates correspondingly, and a pre-clamping assembly is arranged between the upper positioning seat and the lower positioning seat; the upper positioning seat and the lower positioning seat are further provided with a plurality of telescopic frames which correspond to each other up and down through sliding holes and are annularly and movably arranged, clamping assemblies used for clamping metal sheets are arranged at the ends of the telescopic frames, and edge searching mechanisms are arranged between the telescopic frames on the upper positioning seat and the clamping assemblies. And a driving mechanism used for driving the telescopic frame is arranged in the lower positioning seat, and a controller is arranged on the two lifting mounting plates. The effects that the clamping assembly is moved to the edge of the metal sheet for clamping, and the distances between all clamping point positions and the edge of the metal sheet are consistent are achieved, so that stress borne by the edge in the machining process is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of metal clamping equipment, in particular to a clamping device for metal surface treatment. Background Art

[0002] With the rapid development of modern industrial technology, metal surface processing technology, especially in the manufacture of sheet metal such as aircraft engine blades and turbofans, has increasingly higher requirements for processing accuracy. Therefore, as an important positioning fixture in sheet metal processing, the design and performance of clamping equipment directly affect the processing quality and efficiency.

[0003] The traditional device has the following shortcomings:

[0004] At present, the clamping equipment commonly used in metal sheet processing mainly includes mechanical clamps, pneumatic clamps and hydraulic clamps. These clamps have played an important role in traditional processing, but when faced with high-precision processing needs, there are still many shortcomings. First of all, these clamps usually adopt a centered clamping method. Although this method is simple and easy to use, the stress distribution is uneven because the clamping point is far away from the edge of the metal sheet, which easily causes the metal sheet to deform during the processing and affects the processing accuracy and surface quality. Secondly, there are currently a small number of flexible clamps that can clamp the edges of metal sheets. Although this can increase the force limit and effectively reduce the probability of deformation of the metal sheet during the processing, due to design reasons, the distance from the different clamping points to the edge of the metal sheet still deviates greatly, and the uneven stress distribution cannot be eliminated. The processing accuracy and surface quality will still be affected. Summary of the Invention

[0005] The object of the present invention is to provide a clamping device for metal surface treatment to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a clamping device for metal surface treatment, comprising a mounting frame, wherein two lifting mounting plates are movably provided longitudinally on the side plates of the mounting frame, an upper positioning seat and a lower positioning seat are respectively provided on adjacent sides of the two lifting mounting plates, a pre-clamping assembly is provided between the upper positioning seat and the lower positioning seat, a plurality of telescopic frames are further provided on the upper positioning seat and the lower positioning seat in a circular shape and corresponding to each other through sliding holes, a clamping assembly for clamping a metal sheet is provided at the end of the telescopic frame, an edge-finding mechanism is provided between the telescopic frame on the upper positioning seat and the clamping assembly, a driving mechanism for driving the telescopic frame is provided in the lower positioning seat, and a controller is provided on the two lifting mounting plates;

[0007] The edge-finding mechanism includes:

[0008] An air cavity is centrally located in the upper positioning seat and communicates with the sliding hole. An air inlet pipe is connected to the air cavity. A sliding sealing ring and an air passage are respectively provided at the end and inner side of the telescopic frame on the upper positioning seat. A flow rate sensor and a solenoid valve are also provided at the end of the sliding hole of the upper positioning seat.

[0009] A connecting member is provided on one side of the upper clamping assembly, a feeler rod is connected to the outside of the connecting member, the other end of the feeler rod is slidably and sealably connected to a sensing slide rod via a sliding cavity, a plurality of air vents are also provided on the arm of the feeler rod, and a conduit is connected between the telescopic frame and the feeler rod for communicating the airway with the sliding cavity in the feeler rod;

[0010] The rolling seat is arranged at the lower end of the sensing slide bar, and a spring is sleeved on one end of the sensing slide bar located outside the touch rod.

[0011] Preferably, the clamping assembly includes:

[0012] A hydraulic component is provided at the end of the telescopic frame, the telescopic end of the hydraulic component is provided with a connecting rod, the end of the connecting rod is movably provided with a clamping tube, the end of the connecting rod is slidably and sealedly connected to the sealing cavity on one side of the clamping tube, and the outer side of the connecting rod is provided with a return spring;

[0013] An electromagnet is disposed inside a clamping tube, a rolling portion is provided at the end of the clamping tube, and the upper and lower rolling portions are positioned corresponding to each other. A permanent magnet matching the electromagnet is movably provided inside the clamping tube through a sliding cavity to drive the connector and the feeler rod to rotate;

[0014] An elastic gas cover is arranged on the inner wall of the sealing sliding cavity of the clamping tube for sealing the air hole. A control piece connected to the permanent magnet is also movably arranged in the sealing sliding cavity of the clamping tube.

[0015] Preferably, the connecting piece includes:

[0016] An adjusting rod, the adjusting rod being rotatably connected to a groove on one side of the clamping tube, the touch rod being slidably connected to the adjusting rod by providing a square shaft, the upper end of the touch rod being rotatably connected to an adjusting sleeve, the adjusting sleeve being threadedly connected to the outer wall of the adjusting rod;

[0017] A connecting block, one end of which is rotatably connected to the lower edge of the permanent magnet, and the other end of which is slidably connected to a sliding groove at the end of the adjusting rod.

[0018] Preferably, the rolling portion includes:

[0019] The pressure ball is movably arranged in a ball groove at the top end of the clamping tube. The top end of the clamping tube is also movably provided with a magnetic pressing block matching the pressure ball by opening an inner groove.

[0020] Preferably, the driving mechanism includes:

[0021] A motor, the motor being disposed in a mounting cavity inside the lower positioning seat, and the output end of the motor being connected to a main gear;

[0022] A screw rod, the screw rod is movably arranged in the sliding hole of the lower positioning seat, the telescopic frame in the sliding hole of the lower positioning seat is sleeved on the screw rod through a hole and the end thereof is connected to the sliding piece on the screw rod, and a pair gear is provided at the end of the screw rod;

[0023] An electric self-controlled clutch, which is arranged in a mounting cavity inside the lower positioning seat and is connected to the main gear and the sub-gear respectively;

[0024] A distance sensor is provided on the rolling seat.

[0025] Preferably, the controller is electrically connected to the flow rate sensor, the solenoid valve, the hydraulic component, the electromagnet, the electric automatic clutch and the distance sensor through wires.

[0026] Preferably, the conduit is made of a high-pressure spring hose.

[0027] Preferably, the inner sides of the upper positioning seat and the lower positioning seat are slidably connected to the telescopic frame by forming a transverse groove.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention is provided with an edge-finding mechanism, which realizes the effect of moving the clamping assembly to the edge of the metal sheet for clamping, and all clamping points are at the same distance from the edge of the metal sheet, so that the stress on the edge of the metal sheet during processing is more uniform and less likely to deform, which significantly improves the processing accuracy and surface quality of the metal sheet. Secondly, the clamp is driven to move by air pressure, and after it is in place, it actively releases pressure to position and closes the solenoid valve without affecting the movement and edge-finding of other clamps. The overall structure is simple, the positioning is precise, the degree of automation is high, and the clamping efficiency is significantly improved.

[0030] 2. The present invention is provided with a clamping assembly and utilizes the retractability of the clamping tube to enable the clamping assembly to match uneven metal surfaces during the edge-finding process, thereby improving the adaptability and practicality of the clamping device. At the same time, the cooperation between the electromagnet and the permanent magnet realizes the rapid locking of the connecting rod and the clamping tube and the rapid folding of the edge-finding mechanism, thereby avoiding interference with the processing of the metal sheet edge. Moreover, the two can be completed synchronously with a reasonable design, with good linkage and avoiding structural redundancy.

[0031] 3. The present invention, by providing a connecting piece, realizes the flexible setting of the distance between the clamping point of the clamp and the edge of the metal sheet, optimizes the edge-finding capability, further improves the adaptability and practicality of the clamping device to different clamping requirements, and uses the connecting block to ensure the stability of the connection between the adjustment rod and the permanent magnet without causing motion interference;

[0032] 4. The present invention is provided with a rolling part, and uses the changes in the attraction and repulsion of the magnetic pressing block by the electromagnet to synchronously control the movement and locking of the pressure ball. The control is flexible and the state switching is rapid, which not only ensures the flexibility when finding the edge, but also ensures the stability when clamping.

[0033] 5. The present invention realizes precise control of the displacement distance of the telescopic frame on the lower positioning seat by providing a driving mechanism, ensuring that the lower pressure balls can correspond to the positions of the upper pressure balls, further improving the positioning accuracy of the clamping points. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an overall three-dimensional diagram of the present invention;

[0035] Figure 2 It is the overall front view of the present invention;

[0036] Figure 3 It is a three-dimensional schematic diagram of the clamping assembly and edge-finding mechanism of the present invention;

[0037] Figure 4 It is a schematic diagram of the overall internal structure of the present invention;

[0038] Figure 5 It is a schematic front view of the internal structure of the clamping assembly and edge-finding mechanism of the present invention;

[0039] Figure 6 For the present invention Figure 5 A magnified schematic diagram at point A;

[0040] Figure 7 For the present invention Figure 5 An enlarged schematic diagram at B in FIG.

[0041] Figure 8 It is a schematic top view of the internal structure of the driving mechanism of the present invention;

[0042] Figure 9 This is a schematic diagram of the deflation of the touch rod of the present invention;

[0043] Figure 10 It is a schematic diagram of the folding of the edge-finding mechanism of the present invention.

[0044] In the figure: 1. Mounting frame; 2. Two lifting mounting plates; 3. Upper positioning seat; 4. Lower positioning seat; 5. Pre-clamping assembly; 6. Telescopic frame; 7. Clamping assembly; 701. Hydraulic component; 702. Connecting rod; 703. Clamping tube; 704. Return spring; 705. Electromagnet; 706. Permanent magnet; 707. Elastic gas cover; 708. Control plate; 8. Edge-finding mechanism; 801. Air cavity; 802. Inlet pipe; 803. Sliding seal ring; 804. Airway; 805. Flow rate sensor; 806. Solenoid valve; 807, touch rod; 808, sensing slide; 809, vent hole; 810, conduit; 811, rolling seat; 812, spring; 9, driving mechanism; 901, motor; 902, main gear; 903, lead screw; 904, sub-gear; 905, electric automatic clutch; 906, distance sensor; 10, controller; 11, connector; 111, adjusting rod; 112, adjusting sleeve; 113, connecting block; 12, rolling part; 121, pressure ball; 122, magnetic pressure block. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] It should be noted that when an element is referred to as being "fixed," "mounted," "connected," or "disposed" with another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation as described in the specification. Therefore, they should not be understood as limiting the present invention.

[0047] As a further refinement of the present invention, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0048] See also Figure 1-10As shown, the present invention provides a technical solution of a clamping device for metal surface treatment: a clamping device for metal surface treatment, comprising a mounting frame 1, two lifting mounting plates 2 are movably mounted longitudinally on the side plates of the mounting frame 1, and the two lifting mounting plates 2 are moved up and down along the side plates to adjust the spacing under the action of the built-in driver of the mounting frame 1. An upper positioning seat 3 and a lower positioning seat 4 are respectively mounted on the adjacent sides of the two lifting mounting plates 2, and a pre-clamping component 5 is mounted between the upper positioning seat 3 and the lower positioning seat 4. The pre-clamping component 5 consists of two oppositely mounted telescopic rods and a clamping head. The upper positioning seat 3 and the lower positioning seat 4 are also provided with a plurality of telescopic frames 6 corresponding to each other and slidingly connected in an annular manner through sliding holes. A clamping component 7 for clamping a metal sheet is installed on the end of the telescopic frame 6, an edge-finding mechanism 8 is installed between the telescopic frame 6 on the upper positioning seat 3 and the clamping assembly 7, a driving mechanism 9 for driving the telescopic frame 6 is installed in the lower positioning seat 4, and a controller 10 for regulating the operation of the clamping device is installed on the two lifting mounting plates 2;

[0049] The edge-finding mechanism 8 includes an air cavity 801, a connector 11, and a rolling seat 811. The air cavity 801 is centrally located within the upper positioning seat 3 and communicates with the sliding hole. An air inlet pipe 802 is connected to the air cavity 801. A sliding seal 803 is provided at the end of the telescopic frame 6 on the upper positioning seat 3. This ensures airtightness between the telescopic frame 6 and the sliding hole of the upper positioning seat 3. An air passage 804 is also provided within the telescopic frame 6. A flow rate sensor 805 and a solenoid valve 806 are also installed at the end of the sliding hole of the upper positioning seat 3. When the air inlet pipe 802 pressurizes the air cavity 801, the telescopic frame 6 in the sliding hole of the upper positioning seat 3 begins to slide outward as the air pressure rises.

[0050] Connecting member 11 is movably mounted on one side of the upper clamping assembly 7. A contact rod 807 is connected to the outer side of connecting member 11. The other end of contact rod 807 is slidably and hermetically connected to a sensing slide rod 808 via a sliding cavity. Several air vent holes 809 are also provided on the arm of contact rod 807. The lower end of sensing slide rod 808 is rectangular and mates with the lower opening of contact rod 807, preventing rotation of sensing slide rod 808 during extension and retraction. When the sealed end of sensing slide rod 808 moves above air vent holes 809, the upper end of the sliding cavity of contact rod 807 is sealed. When the sealed end of sensing slide rod 808 moves below air vent holes 809, the upper end of the sliding cavity of contact rod 807 is deflated. A conduit 810 connects the air passage 804 to the sliding cavity within contact rod 807. The rolling seat 811 is fixed to the lower end of the sensing slide bar 808. A roller is provided on one side of the rolling seat 811 for contacting the surface of the metal sheet during edge finding. A spring 812 is provided on one end of the sensing slide bar 808 located on the outside of the touch rod 807 for applying a force to the sensing slide bar 808 and the rolling seat 811 away from the touch rod 807.

[0051] To clamp a metal sheet, the distance between the two lifting mounting plates 2 is first adjusted to separate the two clamping heads of the pre-clamping assembly 5. The metal sheet is then placed between the pre-clamping assemblies 5, and the distance between the two lifting mounting plates 2 is reduced until the sheet is initially clamped by the pre-clamping assembly 5. The clamping assembly 7 is then in contact with the surface of the metal sheet, and the rolling seat 811 is pressed against the upper surface of the metal sheet. The sensing slide 808 retracts into the contact rod 807, and the spring 812 is compressed. The sealing end of the sensing slide 808 moves above the air vent 809. The upper end of the sliding cavity of the contact rod 807, the conduit 810, the air passage 804, and the air cavity 801 are now sealed. The controller 10 then activates an external air pump to pressurize the air inlet pipe 802 to standard pressure. The telescopic frame 6 within the upper positioning seat 3 and the clamping assembly 7 at its end slide outward under the action of the air pressure. During this sliding process, the end of the clamping assembly 7 and the rollers of the rolling seat 811 maintain contact with the upper surface of the metal sheet.

[0052] When any rolling seat 811 moves beyond the edge of the metal sheet, the sensing slide bar 808 pops out from the contact bar 807 under the action of the spring 812. At this time, the sealing end of the sensing slide bar 808 moves to the bottom of the vent hole 809. Figure 9 As shown, the seal between the upper end of the sliding cavity of the feeler rod 807, the conduit 810, the air passage 804, and the air cavity 801 is broken. The telescopic frame 6, where the rolling seat 811 is located, moves to the predetermined position and stops sliding. Simultaneously, after the seal is broken, the flow rate sensor 805 corresponding to the telescopic frame 6 detects the airflow and feeds it back to the controller 10. The controller 10 controls the corresponding solenoid valve 806 to close and stop the air release. The air cavity 801 is now sealed again, and the air pressure is restored. The remaining telescopic frames 6 that have not yet reached their predetermined positions continue to move under this pressure until all reach their predetermined positions. At this point, the distance from the clamping contact point of all clamping assemblies 7 with the metal sheet to the edge of the metal sheet is equal.

[0053] Through the edge-finding mechanism 8, the clamping assembly 7 is moved to the edge of the metal sheet for clamping, and all clamping points are at the same distance from the edge of the metal sheet, so that the stress on the edge of the metal sheet during processing is more uniform and less likely to deform, which significantly improves the processing accuracy and surface quality of the metal sheet. Secondly, the clamp is driven to move by air pressure, and after it is in place, it actively releases pressure to position and close the solenoid valve 806, which does not affect the movement and edge-finding of other clamps. The overall structure is simple, the positioning is precise, the degree of automation is high, and the clamping efficiency is significantly improved.

[0054] The clamping assembly 7 includes a hydraulic component 701, an electromagnet 705, and an elastic gas cap 707. The hydraulic component 701 is mounted at the end of the telescopic frame 6 and is directly controlled by the controller 10 to precisely apply a set pressure to the clamping point below. A connecting rod 702 is mounted at the telescopic end of the hydraulic component 701. The end of the connecting rod 702 is slidably connected to a clamping tube 703. The end of the connecting rod 702 is slidably and sealedly connected to a sealed cavity on one side of the clamping tube 703. A return spring 704 is sleeved on the outer side of the connecting rod 702. The electromagnet 705 is embedded in the interior of the clamping tube 703. A rolling portion 12 is mounted at the end of the clamping tube 703, and the positions of the upper and lower rolling portions 12 correspond to each other, ensuring that the upper and lower clamping points of the metal sheet can overlap and improve positioning. A permanent magnet 706 that matches the electromagnet 705 is movably mounted in the interior of the clamping tube 703 through a sliding cavity to drive the connection 11 and the contact rod 807 to rotate.

[0055] An elastic gas cover 707 is mounted on the inner wall of the sealed sliding cavity of the clamping tube 703 to seal the air hole. A control plate 708, connected to a permanent magnet 706, is also movably mounted within the sealed sliding cavity of the clamping tube 703. When the control plate 708 is not in contact with the elastic gas cover 707, the elastic gas cover 707 is in an open state. When the control plate 708 moves to a level with the elastic gas cover 707, the elastic gas cover 707 is pressured to close and seal the air hole. At this point, the sealed sliding cavity of the clamping tube 703 is sealed, and the end of the connecting rod 702 cannot slide within the sealed sliding cavity of the clamping tube 703, thus fixing their relative positions.

[0056] When the telescopic frame 6 is extended from the upper positioning seat 3 and the lower positioning seat 4 under the action of the edge-finding mechanism 8 or the driving mechanism 9, the return spring 704 is in a contracted state, and the control plate 708 is located above the elastic air cover 707. When passing through the curvature or undulation of the metal sheet surface, the clamping tube 703 can overcome the elastic force of the return spring 704 and extend along the connecting rod 702, ensuring that the rolling portion 12 is always in contact with the upper and lower surfaces of the metal sheet. Figure 5 As shown, during this process, the electromagnet 705 remains energized to generate sufficient repulsive force on the permanent magnet 706 to ensure that the rolling seat 811 at the end of the contact rod 807 is in contact with the upper surface of the metal sheet, while the control sheet 708 is away from the elastic air cover 707, and the clamping tube 703 can be extended and retracted along the connecting rod 702.

[0057] The clamping assembly 7 in the device is divided into two parts according to the installation position, and is respectively installed at the ends of the telescopic frame 6 on the upper positioning seat 3 and the lower positioning seat 4. After the telescopic frame 6 on the upper positioning seat 3 drives the clamping assembly 7 to find the edge, the telescopic frame 6 on the lower positioning seat 4 can drive the clamping assembly 7 to extend to the specified position under the drive of the driving mechanism 9 until the upper and lower rolling parts 12 correspond to each other. At this time, the controller 10 can first control the electromagnet 705 to change the direction of the current to generate an attractive force on the permanent magnet 706, and the permanent magnet 706 slides toward the electromagnet 705 to drive the connecting piece 11 to rotate 90 degrees. Figure 10 As shown, the edge-finding mechanism 8 is folded. Simultaneously, the control plate 708, driven by the permanent magnet 706, moves to the side of the elastic gas cover 707 to close it, thereby fixing the relative positions of the connecting rod 702 and the clamping tube 703. At this point, the controller 10 can continue to control all hydraulic components 701 to output a constant pressure, meaning that all rolling portions 12 clamp the metal sheet in a corresponding manner, with a constant clamping force.

[0058] Through the clamping assembly 7, the retractability of the clamping tube 703 is utilized, so that the clamping assembly 7 can match the uneven metal surface during the edge-finding process, thereby improving the adaptability and practicality of the clamping device. At the same time, the cooperation of the electromagnet 705 and the permanent magnet 706 realizes the rapid locking of the connecting rod 702 and the clamping tube 703 and the rapid folding of the edge-finding mechanism 8, thereby avoiding interference with the processing of the edge of the metal sheet. Moreover, the two can be completed synchronously by utilizing a reasonable design, with good linkage and avoiding structural redundancy.

[0059] The connector 11 includes an adjustment rod 111 and a connecting block 113. The adjustment rod 111 is rotatably connected to a groove on one side of the clamping tube 703. The contact rod 807 is slidably connected to the adjustment rod 111 via a square shaft provided at its end. The square shaft connection restricts the contact rod 807 to sliding relative to the adjustment rod 111 and preventing rotation. An adjustment sleeve 112 is rotatably connected to the upper end of the contact rod 807. The adjustment sleeve 112 is threadedly connected to the outer wall of the adjustment rod 111. Rotating the adjustment sleeve 112 adjusts the relative distance between the adjustment rod 111 and the contact rod 807, thereby adjusting the spacing between the rolling seat 811 and the rolling portion 12. This operation also adjusts the distance between the clamp's clamping point and the edge of the metal sheet. One end of the connecting block 113 is rotatably connected to the lower edge of the permanent magnet 706. The other end of the connecting block 113 is slidably connected to a slot on the adjustment rod 111. When the permanent magnet 706 slides up and down, the connecting block 113 can ensure that the permanent magnet 706 is stably connected to the end of the adjusting rod 111 without causing interference.

[0060] Through the connecting piece 11, the distance between the clamping point of the clamp and the edge of the metal sheet can be flexibly set, the edge-finding capability is optimized, and the adaptability and practicality of the clamping device to different clamping requirements are further improved. In addition, the connecting block 113 is used to ensure the stability of the connection between the adjusting rod 111 and the permanent magnet 706 without causing motion interference.

[0061] The rolling portion 12 includes a pressure ball 121. Pressure ball 121 is mounted in a ball groove at the top of the clamping tube 703 and is free to rotate. The surface of pressure ball 121 is provided with a non-slip coating. A magnetic pressure block 122 is also movably mounted at the top of the clamping tube 703 via an internal groove. The magnetic pressure block 122 is controlled by an electromagnet 705 to slide within the clamping tube 703. When pressure ball 121 needs to press a metal sheet into position, electromagnet 705 exerts an attractive force on permanent magnet 706. When permanent magnet 706 is positioned near electromagnet 705, magnetic pressure block 122 is repelled by the electromagnet 705 and pressed against pressure ball 121, preventing it from rotating. Conversely, when telescopic frame 6 drives clamping assembly 7 to move horizontally, electromagnet 705 exerts an attractive force on magnetic pressure block 122, allowing pressure ball 121 to roll freely.

[0062] Through the rolling part 12, the electromagnet 705 is used to synchronously control the movement and locking of the pressure ball 121 by changing the attraction and repulsion of the magnetic pressure block 122. The control is flexible and the state switching is rapid, which not only ensures the flexibility when finding the edge, but also ensures the stability when clamping.

[0063] The driving mechanism 9 includes a motor 901, a screw rod 903, an electric automatic clutch 905 and a distance sensor 906. The motor 901 is installed in the mounting cavity inside the lower positioning seat 4, and the output end of the motor 901 is connected to the main gear 902. The screw rod 903 is rotatably connected to the sliding hole of the lower positioning seat 4. The telescopic frame 6 in the sliding hole of the lower positioning seat 4 is sleeved on the screw rod 903 by opening a hole and the end is connected to the sliding piece on the screw rod 903. The end of the screw rod 903 is installed with a sub-gear 904. The electric automatic clutch 905 is installed in the mounting cavity inside the lower positioning seat 4 and is respectively connected to the main gear 902 and the sub-gear 904. The electric automatic clutch 905 can be controlled by the controller 10 to establish or interrupt the power output of the main gear 902 to the sub-gear 904. The distance sensor 906 is installed on the rolling seat 811. When the rolling seat 811 slides out of the edge of the metal sheet, the distance sensor 906 extends to the bottom of the metal sheet. At this time, the distance sensor 906 can detect the distance between the rolling seat 811 and the lower clamping tube 703, thereby determining whether the pressure ball 121 on the lower clamping tube 703 is aligned with the pressure ball 121 on the upper clamping tube 703.

[0064] When the edge-finding mechanism 8 completes its edge-finding process and the upper pressure ball 121 is in place, the controller 10 activates the motor 901 and the electric self-controlled clutch 905, ensuring that all secondary gears 904 can receive the power output of the main gear 902. The motor 901 then rotates all the lead screws 903, and the telescopic frame 6 on the lower positioning seat 4 begins to slide out. When the controller 10 determines, via the distance sensor 906, that the pressure ball 121 on any clamping tube 703 is aligned with the pressure ball 121 on the upper clamping tube 703, the electric self-controlled clutch 905 immediately cuts off the power output of the main gear 902 to the lead screw 903 on that clamping tube 703. Once all the pressure balls 121 are in place, the motor 901 can be turned off.

[0065] Through the driving mechanism 9, the displacement distance of the telescopic frame 6 on the lower positioning seat 4 is accurately controlled to ensure that the lower pressure balls 121 can correspond to the positions of the upper pressure balls 121, further improving the positioning accuracy of the clamping points.

[0066] The controller 10 is electrically connected to the flow rate sensor 805 , the solenoid valve 806 , the hydraulic component 701 , the electromagnet 705 , the electric automatic clutch 905 and the distance sensor 906 via wires.

[0067] The catheter 810 is made of a high-pressure spring hose, which can not only ensure the elasticity of the catheter 810, but also optimize the contraction state to avoid entanglement.

[0068] The inner sides of the upper positioning seat 3 and the lower positioning seat 4 are slidingly connected to the telescopic frame 6 by opening a transverse groove. The sliding connection between the transverse groove and the telescopic frame 6 can ensure the stability of the telescopic frame 6 during movement, and can also provide support for the telescopic frame 6 during the clamping process, thereby improving the clamping effect.

[0069] Working Principle: To clamp a metal sheet, first energize the electromagnet 705 to generate sufficient repulsive force on the permanent magnet 706. The distance between the two lifting mounting plates 2 is then adjusted to separate the two clamping heads of the pre-clamping assembly 5. The metal sheet is then placed between the pre-clamping assembly 5, and the distance between the two lifting mounting plates 2 is reduced until the metal sheet is initially clamped by the pre-clamping assembly 5. At this point, the pressure ball 121 is in contact with both sides of the metal sheet, the rolling seat 811 is pressed against the upper surface of the metal sheet, the sensing slide 808 retracts into the contact rod 807, and the spring 812 and return spring 704 are both compressed.

[0070] The controller 10 then activates the external air pump to pressurize the air inlet pipe 802 to the standard air pressure, and the telescopic frame 6 in the upper positioning seat 3 slides outward under the action of the air pressure. During the sliding process, the pressure ball 121 and the rollers of the rolling seat 811 remain in contact with the upper surface of the metal sheet. When any rolling seat 811 moves beyond the upper edge of the metal sheet, the sensing slide bar 808 pops out from the touch rod 807 under the action of the spring 812, and the air vent 809 begins to deflate. The flow rate sensor 805 corresponding to the telescopic frame 6 where the touch rod 807 is located detects the airflow and feeds it back to the controller 10. The controller 10 controls the corresponding solenoid valve 806 to close and stop the deflation. At this time, the air cavity 801 returns to a sealed state, the air pressure is restored, and the other telescopic frames 6 that have not yet reached their intended positions continue to move until they all reach the predetermined positions. At this point, the upper pressure ball 121 completes the edge search.

[0071] The controller 10 then activates the motor 901, which, under the action of the electric automatic clutch 905, drives all the screws 903 to rotate, causing the telescopic frame 6 on the lower positioning seat 4 to begin sliding out. When the controller 10 determines, via the distance sensor 906, that the pressure ball 121 on any clamping tube 703 is aligned with the pressure ball 121 on the clamping tube 703 above, the electric automatic clutch 905 immediately cuts off the power output from the main gear 902 to the screw 903 on that clamping tube 703. Once all the pressure balls 121 are in place, the motor 901 is turned off.

[0072] Finally, the controller 10 controls the electromagnet 705 to change the direction of the current, generating an attractive force on the permanent magnet 706. The permanent magnet 706 slides toward the electromagnet 705, causing the adjustment rod 111 to rotate 90 degrees, completing the folding of the edge-finding mechanism 8. Simultaneously, the control plate 708, driven by the permanent magnet 706, moves to the side of the elastic air cover 707, closing it. The connecting rod 702 and the clamping tube 703 are locked, and the pressure ball 121 is also locked by the magnetic pressing block 122. At this point, the metal sheet is positioned and can be processed.

[0073] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0074] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A clamping device for metal surface treatment, comprising a mounting frame (1), wherein two lifting mounting plates (2) are movably provided on the side plates of the mounting frame (1), and characterized in that: An upper positioning seat (3) and a lower positioning seat (4) are respectively provided on adjacent sides of the two lifting mounting plates (2), a pre-clamping assembly (5) is provided between the upper positioning seat (3) and the lower positioning seat (4), and a plurality of telescopic frames (6) are provided on the upper positioning seat (3) and the lower positioning seat (4) in a circular manner by opening sliding holes corresponding to each other. A clamping assembly (7) for clamping a metal sheet is provided at the end of the telescopic frame (6), an edge-finding mechanism (8) is provided between the telescopic frame (6) and the clamping assembly (7) on the upper positioning seat (3), a driving mechanism (9) for driving the telescopic frame (6) is provided in the lower positioning seat (4), and a controller (10) is provided on the two lifting mounting plates (2); The edge-finding mechanism (8) comprises: An air cavity (801), the air cavity (801) is centrally opened in the upper positioning seat (3) and communicates with the sliding hole, the air cavity (801) is connected to an air inlet pipe (802), a sliding sealing ring (803) and a penetrating air passage (804) are respectively provided at the end and inner side of the telescopic frame (6) on the upper positioning seat (3), and a flow rate sensor (805) and a solenoid valve (806) are also provided at the sliding hole end of the upper positioning seat (3); A connecting member (11), the connecting member (11) is arranged on one side of the upper clamping assembly (7), the outer side of the connecting member (11) is connected to a touch rod (807), the other end of the touch rod (807) is connected to a sensing slide rod (808) through a sliding cavity, and a plurality of air leakage holes (809) are also provided on the rod arm of the touch rod (807), and a conduit (810) is connected between the telescopic frame (6) and the touch rod (807) for connecting the airway (804) and the sliding cavity in the touch rod (807); A rolling seat (811) is provided at the lower end of the sensing slide bar (808), and a spring (812) is sleeved on one end of the sensing slide bar (808) located outside the touch rod (807).

2. The metal surface treatment clamping device according to claim 1, characterized in that: The clamping assembly (7) comprises: A hydraulic component (701), the hydraulic component (701) being arranged at the end of the telescopic frame (6), the telescopic end of the hydraulic component (701) being provided with a connecting rod (702), the end of the connecting rod (702) being movably provided with a clamping tube (703), the end of the connecting rod (702) being slidably sealedly connected to a sealing cavity on one side of the clamping tube (703), and the outer side of the connecting rod (702) being provided with a return spring (704); An electromagnet (705), the electromagnet (705) being arranged inside a clamping tube (703), a rolling portion (12) being provided at an end portion of the clamping tube (703), and positions of the upper and lower rolling portions (12) corresponding to each other, and a permanent magnet (706) matching the electromagnet (705) being provided inside the clamping tube (703) by opening a sliding cavity for driving the connecting member (11) and the contact rod (807) to rotate; An elastic gas cover (707) is provided on the inner wall of the sealing sliding cavity of the clamping tube (703) for sealing the air hole. A control plate (708) connected to the permanent magnet (706) is also movably provided in the sealing sliding cavity of the clamping tube (703).

3. The metal surface treatment clamping device according to claim 2, characterized in that: The connecting member (11) includes: An adjusting rod (111), the adjusting rod (111) is rotatably connected to a groove on one side of the clamping tube (703), the touch rod (807) is slidably connected to the adjusting rod (111) by providing a square shaft, the upper end of the touch rod (807) is rotatably connected to an adjusting sleeve (112), and the adjusting sleeve (112) is threadedly connected to the outer wall of the adjusting rod (111); A connecting block (113), one end of the connecting block (113) is rotatably connected to the lower edge of the permanent magnet (706), and the other end of the connecting block (113) is slidably connected to a sliding groove at the end of the adjusting rod (111).

4. The metal surface treatment clamping device according to claim 2, wherein: The rolling portion (12) includes: A pressure ball (121) is movably arranged in a ball groove at the top end of the clamping tube (703), and a magnetic pressing block (122) matching the pressure ball (121) is movably arranged at the top end of the clamping tube (703) by opening an inner groove.

5. The metal surface treatment clamping device according to claim 2, characterized in that: The driving mechanism (9) comprises: A motor (901), the motor (901) being arranged in a mounting cavity inside the lower positioning seat (4), and the output end of the motor (901) being connected to a main gear (902); A screw rod (903), the screw rod (903) is movably arranged in the sliding hole of the lower positioning seat (4), the telescopic frame (6) in the sliding hole of the lower positioning seat (4) is sleeved on the screw rod (903) through a hole, and the end portion is connected to the sliding member on the screw rod (903), and the end portion of the screw rod (903) is provided with a sub-gear (904); An electric self-controlled clutch (905), the electric self-controlled clutch (905) being arranged in a mounting cavity inside the lower positioning seat (4) and connected to the main gear (902) and the sub-gear (904) respectively; A distance sensor (906) is provided on the rolling seat (811).

6. The metal surface treatment clamping device according to claim 5, characterized in that: The controller (10) is electrically connected to the flow rate sensor (805), the solenoid valve (806), the hydraulic component (701), the electromagnet (705), the electric self-controlled clutch (905), and the distance sensor (906) via wires.

7. The metal surface treatment clamping device according to claim 1, wherein: The conduit (810) is made of a high-pressure spring hose.

8. The metal surface treatment clamping device according to claim 1, wherein: The inner sides of the upper positioning seat (3) and the lower positioning seat (4) are slidably connected to the telescopic frame (6) by providing a transverse groove.

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