A clamping device for metal surface treatment

Abstract

The application discloses a clamping device for metal surface treatment, which comprises a mounting frame, two lifting mounting plates are movably arranged on the side plates of the mounting frame in the longitudinal direction, an upper positioning seat and a lower positioning seat are respectively arranged on the adjacent sides of the two lifting mounting plates, a pre-clamping assembly is arranged between the upper positioning seat and the lower positioning seat, a plurality of telescopic frames are movably arranged on the upper positioning seat and the lower positioning seat in a ring shape through the opening of sliding holes in the upper and lower directions, a clamping assembly for clamping metal sheets is arranged at the end of the telescopic frame, an edge searching mechanism is arranged between the telescopic frame and the clamping assembly on the upper positioning seat, a driving mechanism for driving the telescopic frame is arranged in the lower positioning seat, and a controller is arranged on the two lifting mounting plates. The clamping device can move the clamping assembly to the edge of the metal sheet for clamping, and all clamping points are consistent with the distance from the edge of the metal sheet, so that the stress on the edge of the metal sheet is more uniform during the machining process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal clamping equipment, in particular to a clamping device for metal surface treatment. BACKGROUND

[0002] With the rapid development of modern industrial technology, the metal surface processing technology, especially in the manufacture of aero-engine blades, turbofan and other metal sheets, the requirement for processing precision is increasing. Therefore, as an important positioning fixture in metal sheet processing, the design and performance of the clamping device directly affect the processing quality and efficiency.

[0003] The traditional device has the following disadvantages:

[0004] The clamping device commonly used in metal sheet processing at present mainly includes mechanical clamps, pneumatic clamps and hydraulic clamps, etc. These clamps have played an important role in traditional processing, but there are still many deficiencies when facing the demand for high precision processing. First of all, these clamps usually adopt the center clamping method, which is simple and easy to operate, but because the clamping point is far away from the edge of the metal sheet, the stress distribution is uneven, which is easy to cause the metal sheet to deform in the processing process, and affects the processing precision and surface quality. Secondly, there are also a small part of flexible clamps that can clamp the edge of the metal sheet, which can improve the stress limit and effectively reduce the deformation probability of the metal sheet during processing, but due to design reasons, the distance from different clamping points to the edge of the metal sheet is still large, and the uneven stress distribution cannot be eliminated, and the processing precision and surface quality will still be affected. SUMMARY

[0005] The purpose of the present application is to provide a clamping device for metal surface treatment to solve the problems raised in the background art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a clamping device for metal surface treatment, comprising a mounting frame, two lifting mounting plates are movably arranged longitudinally on the side plates of the mounting frame, an upper positioning seat and a lower positioning seat are respectively arranged on one side of the two lifting mounting plates, a pre-clamping assembly is arranged between the upper positioning seat and the lower positioning seat, a plurality of telescopic frames are movably arranged in a ring shape on the upper positioning seat and the lower positioning seat through the opening of the sliding hole, the end of the telescopic frame is provided with a clamping assembly for clamping the metal sheet, a edge-finding mechanism is arranged between the telescopic frame and the clamping assembly on the upper positioning seat, a driving mechanism for driving the telescopic frame is arranged in the lower positioning seat, and a controller is arranged on the two lifting mounting plates.

[0007] The edge-finding mechanism comprises:

[0008] An air cavity is centrally arranged in the upper positioning seat and communicates with the sliding hole, and an air inlet pipe is connected to the air cavity; the end and inner side of the telescopic frame of the upper positioning seat are respectively provided with a sliding sealing ring and a penetrating air passage; and the end of the sliding hole of the upper positioning seat is further provided with a flow rate sensor and an electromagnetic valve;

[0009] A connecting piece is arranged on one side of the upper clamping assembly, and a touch rod is connected to the outer side of the connecting piece; one end of the touch rod is slidingly and sealingly connected to a sensing sliding rod through a sliding cavity; a plurality of air release holes are arranged on the rod arm of the touch rod; and a conduit is connected between the telescopic frame and the touch rod to communicate the air passage and the sliding cavity in the touch rod;

[0010] A rolling seat is arranged at the lower end of the sensing sliding rod, and a spring is arranged at one end of the sensing sliding rod outside the touch rod.

[0011] Preferably, the clamping assembly comprises:

[0012] A hydraulic piece is arranged at the end of the telescopic frame, a connecting rod is arranged at the telescopic end of the hydraulic piece, a clamping pipe is movably arranged at the end of the connecting rod, the end of the connecting rod is slidingly and sealingly connected to a sealing cavity on one side of the clamping pipe, and a return spring is arranged outside the connecting rod.

[0013] An electromagnet is arranged inside the clamping pipe, the end of the clamping pipe is provided with a rolling part, and the positions of the upper and lower rolling parts correspond to each other; a permanent magnet matched with the electromagnet is movably arranged in the sliding cavity of the clamping pipe to drive the connecting piece and the touch rod to rotate.

[0014] An elastic air cover is arranged on the inner wall of the sealing sliding cavity of the clamping pipe to block the air hole, and a control piece connected with the permanent magnet is movably arranged in the sealing sliding cavity of the clamping pipe.

[0015] Preferably, the connecting piece comprises:

[0016] An adjusting rod is rotatably connected in a groove on one side of the clamping pipe, the touch rod is slidingly connected with the adjusting rod through a square shaft, an adjusting sleeve is rotatably connected to the upper end of the touch rod, and the adjusting sleeve is threadedly connected with the outer wall of the adjusting rod.

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

[0018] Preferably, the rolling part comprises:

[0019] A pressure ball is movably arranged in a ball groove at the top end of the clamping pipe, and a magnetic pressure block matched with the pressure ball is movably arranged in an inner groove at the top end of the clamping pipe.

[0020] Preferably, the driving mechanism comprises:

[0021] A motor is arranged in the mounting cavity inside the lower positioning base, and the output end of the motor is connected with a main gear;

[0022] A screw rod is movably arranged in the sliding hole of the lower positioning base, the telescopic frame in the sliding hole of the lower positioning base is sleeved on the screw rod through the opening hole, and the end portion of the telescopic frame is connected with the sliding piece on the screw rod, and the end portion of the screw rod is provided with a secondary gear;

[0023] An electric automatic clutch is arranged in the mounting cavity inside the lower positioning base and is connected with the main gear and the secondary gear respectively;

[0024] A distance sensor is arranged on the rolling base.

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

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

[0027] Preferably, the inner sides of the upper positioning base and the lower positioning base are slidably connected with the telescopic frame through the opening of the transverse groove.

[0028] Compared with the prior art, the present application has the following advantages:

[0029] 1、The present application sets the edge searching mechanism, which can move the clamping assembly to the edge of the metal sheet and clamp it, and all clamping points are consistent with the distance from the edge of the metal sheet, so that the stress on the edge of the metal sheet is more uniform during the processing, and the metal sheet is less likely to deform, thereby significantly improving the processing precision and surface quality of the metal sheet, and the clamps are driven by air pressure, and after positioning, the active pressure relief positioning and closing of the electromagnetic valve do not affect the movement of other clamps for edge searching, the overall structure is simple, the positioning is accurate, the automation degree is high, and the clamping efficiency is significantly improved.

[0030] 2、The present application sets the clamping assembly, which can match the uneven metal surface during edge searching by the telescopic clamping pipe, improves the adaptability and practicality of the clamping device, and realizes the quick locking of the connecting rod and the clamping pipe and the quick folding of the edge searching mechanism through the cooperation of the electromagnet and the permanent magnet, avoids interference with the processing of the edge of the metal sheet, and both can be completed synchronously through reasonable design, has good linkage, and avoids structural redundancy.

[0031] 3、The present application is provided with a connecting piece, which realizes flexible setting of the distance between the clamping point of the clamp and the edge of the metal sheet, optimizes the edge searching capability, and further improves the adaptability and practicality of the clamping device to different clamping requirements, and ensures the stability of the connection between the adjusting rod and the permanent magnet under the premise that no motion interference is caused;

[0032] 4、The present application is provided with a rolling part, which uses the change of the attraction and repulsion of the electromagnet to the magnetic pressing block to synchronously link and control the movement and locking of the pressure ball, and the control is flexible, and the state switching is rapid, which ensures the flexibility during edge searching and the stability during clamping;

[0033] 5、The present application is provided with a driving mechanism, which realizes accurate control of the displacement distance of the telescopic frame on the lower positioning seat, ensures that the lower pressure ball can correspond to the position of the upper pressure ball, and further improves the positioning accuracy of the clamping point. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is the overall perspective view of the present application;

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

[0036] Figure 3 It is the perspective schematic view of the clamping assembly and the edge searching mechanism of the present application;

[0037] Figure 4 It is the overall internal structure front view schematic of the present application;

[0038] Figure 5 It is the internal structure front view schematic of the clamping assembly and the edge searching mechanism of the present application;

[0039] Figure 6 It is the Figure 5 enlarged schematic view of the present application at A;

[0040] Figure 7 It is the Figure 5 enlarged schematic view of the present application at B;

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

[0042] Figure 9 It is the air release schematic view of the present application;

[0043] Figure 10 It is the folding schematic view of the edge searching mechanism of the present application.

[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 part; 702, connecting rod; 703, clamping pipe; 704, return spring; 705, electromagnet; 706, permanent magnet; 707, elastic air cap; 708, control piece; 8, edge finding mechanism; 801, air cavity; 802, air inlet pipe; 803, sliding sealing ring; 804, air passage; 805, flow rate sensor; 806, electromagnetic valve; 807, touch rod; 808, inductive sliding rod; 809, air vent; 810, guide pipe; 811, rolling seat; 812, spring; 9, driving mechanism; 901, motor; 902, main gear; 903, screw rod; 904, secondary gear; 905, electric automatic control clutch; 906, distance sensor; 10, controller; 11, connecting piece; 111, adjusting rod; 112, adjusting sleeve; 113, connecting block; 12, rolling part; 121, pressure ball; 122, magnetic pressing block. DETAILED DESCRIPTION

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

[0046] It should be noted that when an element is referred to as being "fixed", "mounted", "connected" or "set" with another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0047] As a further improvement of the present application, the terms "first", "second", "third" and the like are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0048] Please refer to Figures 1-10As shown, the present application provides a kind of technical scheme of clamping device for metal surface treatment: a kind of clamping device for metal surface treatment, including mounting bracket 1, two lifting mounting plates 2 are movably installed on the side plate of mounting bracket 1 along the longitudinal direction, two lifting mounting plates 2 are moved up and down along the side plate under the action of built-in drive in mounting bracket 1 and adjust the interval, the side of two lifting mounting plates 2 adjacent is respectively equipped with upper locating seat 3 and lower locating seat 4, and pre-clamping assembly 5 is installed between upper locating seat 3 and lower locating seat 4, pre-clamping assembly 5 is composed of two opposite installation telescopic rod and chuck, and a plurality of telescopic frames 6 are slidably connected in ring shape on upper locating seat 3 and lower locating seat 4 by being set with sliding hole up and down, and the end of telescopic frame 6 is equipped with clamping assembly 7 for clamping metal sheet, and edge finding mechanism 8 is installed between telescopic frame 6 and clamping assembly 7 on upper locating seat 3, and drive mechanism 9 for driving telescopic frame 6 is installed in lower locating seat 4, and controller 10 for regulating the operation of the clamping device is installed on two lifting mounting plates 2.

[0049] Edge finding mechanism 8 includes air cavity 801, connecting piece 11 and rolling seat 811. Air cavity 801 is centrally provided in upper locating seat 3 and is communicated with sliding hole, air inlet pipe 802 is connected to air cavity 801, sliding sealing ring 803 is arranged at the end of telescopic frame 6 on upper locating seat 3, sliding sealing ring 803 ensures the air tightness between telescopic frame 6 and sliding hole of upper locating seat 3, air passage 804 is further provided in the inside of telescopic frame 6, and flow rate sensor 805 and electromagnetic valve 806 are further installed at the end of sliding hole of upper locating seat 3. When air inlet pipe 802 pressurizes air cavity 801, telescopic frame 6 in the sliding hole of upper locating seat 3 will begin to slide outward with the increase of air pressure.

[0050] Connecting piece 11 is movably installed on one side of upper clamping assembly 7, touch rod 807 is connected to the outside of connecting piece 11, sensing slide rod 808 is slidably and sealingly connected to the other end of touch rod 807 by being provided with sliding cavity, and a plurality of air release holes 809 are further provided on the arm of touch rod 807. The lower end of sensing slide rod 808 can be rectangular and matched with the lower opening of touch rod 807 to avoid the rotation of sensing slide rod 808 during the telescopic process. When the sealing end of sensing slide rod 808 moves above air release hole 809, the upper end of sliding cavity of touch rod 807 is in a sealed state, and when the sealing end of sensing slide rod 808 moves below air release hole 809, the upper end of sliding cavity of touch rod 807 is in a venting state. Conduit 810 is connected between telescopic frame 6 and touch rod 807 for connecting air passage 804 and sliding cavity in touch rod 807. Rolling seat 811 is fixed at the lower end of sensing slide rod 808, one side of rolling seat 811 is provided with a roller for contacting the surface of metal sheet during edge finding process, and spring 812 is sleeved on the end of sensing slide rod 808 outside touch rod 807 for applying force to sensing slide rod 808 and rolling seat 811 in the direction away from 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 comprises a hydraulic component 701, an electromagnet 705 and an elastic air cover 707. The hydraulic component 701 is installed at the end of the telescopic frame 6, and is directly controlled by the controller 10 to accurately exert a set pressure on the lower clamping point. The telescopic end of the hydraulic component 701 is provided with a connecting rod 702, the end of the connecting rod 702 is slidingly connected with a clamping pipe 703, the end of the connecting rod 702 is slidingly and sealingly connected with a sealing cavity on one side of the clamping pipe 703, and the outer side of the connecting rod 702 is provided with a return spring 704. The electromagnet 705 is embeddedly installed in the clamping pipe 703, the end of the clamping pipe 703 is provided with a rolling part 12, and the positions of the upper and lower rolling parts 12 correspond to each other, so that the upper and lower clamping points of the metal sheet can coincide to improve the positioning effect, and the clamping pipe 703 is movably provided with a permanent magnet 706 matched with the electromagnet 705 in a sliding cavity, for driving the connecting piece 11 and the touch rod 807 to rotate.

[0055] The elastic air cover 707 is installed on the inner wall of the sealing sliding cavity of the clamping pipe 703 to block the air hole, and the control sheet 708 connected with the permanent magnet 706 is movably installed in the sealing sliding cavity of the clamping pipe 703. When the control sheet 708 is not in contact with the elastic air cover 707, the elastic air cover 707 is in an open state, and when the control sheet 708 moves to be horizontal with the elastic air cover 707, the elastic air cover 707 is closed under pressure to block the air hole. At this time, the sealing sliding cavity of the clamping pipe 703 is in a sealed state, and the end of the connecting rod 702 cannot slide in the sealing sliding cavity of the clamping pipe 703, and the relative positions of the two are fixed.

[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 searching mechanism 8 or the driving mechanism 9, the return spring 704 is in a contracted state, and the control sheet 708 is located above the elastic air cover 707. When passing through the arc or undulation of the metal sheet surface, the clamping pipe 703 can overcome the elastic force of the return spring 704 and extend along the connecting rod 702, so that the rolling part 12 is always in contact with the upper and lower surfaces of the metal sheet. As shown in the figure, the electromagnet 705 is kept powered on to generate sufficient repulsive force on the permanent magnet 706 to ensure that the rolling seat 811 at the end of the touch rod 807 is in contact with the upper surface of the metal sheet, and the control sheet 708 is away from the elastic air cover 707, so that the clamping pipe 703 can extend along the connecting rod 702. Figure 5

[0057] ​The clamping assembly 7 in the device is divided into upper and lower parts according to the installation position and is installed at the end 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 complete the edge searching, 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 current direction to generate an attractive force on the permanent magnet 706, and the permanent magnet 706 slides to the electromagnet 705 direction to drive the connecting piece 11 to rotate 90 degrees, as shown in FIG. 8, to complete the folding of the edge searching mechanism 8. At the same time, since the control sheet 708 is moved to the side of the elastic air cover 707 under the drive of the permanent magnet 706 to close it, the relative position of the connecting rod 702 and the clamping pipe 703 is fixed. At this time, the controller 10 can continue to control all the hydraulic parts 701 to output a constant pressure, that is, all the rolling parts 12 correspond to each other to complete the clamping of the metal sheet and the clamping force is constant. Figure 10

[0058] Through the clamping assembly 7, the telescopic property of the clamping pipe 703 is used to make the clamping assembly 7 match the uneven metal surface during edge searching, improve the adaptability and practicality of the clamping device, and through the cooperation of the electromagnet 705 and the permanent magnet 706, the quick locking of the connecting rod 702 and the clamping pipe 703 and the quick folding of the edge searching mechanism 8 are realized, avoiding interference with the processing of the edge of the metal sheet, and both can be completed synchronously through reasonable design, good linkage, and avoiding structural redundancy.

[0059] The connecting piece 11 includes an adjusting rod 111 and a connecting block 113. The adjusting rod 111 is rotationally connected in a groove on one side of the clamping pipe 703, and the touch rod 807 is slidably connected with the adjusting rod 111 through a square shaft formed at the end. The connection of the square shaft can limit the touch rod 807 to slide relative to the adjusting rod 111 without rotating. The upper end of the touch rod 807 is rotationally connected with an adjusting sleeve 112, and the adjusting sleeve 112 is threadedly connected with the outer wall of the adjusting rod 111. By rotating the adjusting sleeve 112, the relative distance between the adjusting rod 111 and the touch rod 807 can be set, that is, the distance between the rolling seat 811 and the rolling part 12 is adjusted. This operation is also a setting and adjustment of the distance between the clamping point of the clamp and the edge of the metal sheet. One end of the connecting block 113 is rotationally connected to the lower edge of the permanent magnet 706, and the other end is slidably connected with the sliding groove on the adjusting rod 111. When the permanent magnet 706 slides up and down, the connecting block 113 can ensure the stable connection of the permanent magnet 706 and the end of the adjusting rod 111 without interference.

[0060] ​The flexible setting of the distance between the clamping point of the clamp and the edge of the metal sheet is realized through the connecting piece 11, the edge searching capability is optimized, the adaptability and practicality of the clamping device to different clamping requirements are further improved, and the stability of the connection between the adjusting rod 111 and the permanent magnet 706 is ensured under the premise that no motion interference is generated by using the connecting block 113.

[0061] The rolling part 12 comprises a pressure ball 121. The pressure ball 121 is installed in a ball groove at the top end of the clamping pipe 703 and can rotate freely. The surface of the pressure ball 121 is provided with an anti-skid coating. The top end of the clamping pipe 703 is also movably installed with a magnetic pressing block 122 matched with the pressure ball 121 by opening an inner groove. The magnetic pressing block 122 is controlled to slide in the clamping pipe 703 by the electromagnet 705. When the pressure ball 121 needs to be pressed to position the metal sheet, the electromagnet 705 generates an attractive force to the permanent magnet 706. When the permanent magnet 706 is located close to the electromagnet 705, the magnetic pressing block 122 is subjected to a repulsive force of the electromagnet 705 and is pressed on the pressure ball 121, so that the pressure ball 121 is positioned and cannot rotate. Conversely, when the telescopic frame 6 drives the clamping assembly 7 to move horizontally, the electromagnet 705 generates an attractive force to the magnetic pressing block 122. The pressure ball 121 can roll freely.

[0062] Through the rolling part 12, the activity and locking of the pressure ball 121 are synchronously linked and controlled by using the change of the attractive force and the repulsive force of the electromagnet 705 to the magnetic pressing block 122. The control is flexible, the state switching is rapid, the flexibility during edge searching is ensured, and the stability during clamping is also ensured.

[0063] The driving mechanism 9 comprises a motor 901, a lead screw 903, an electric automatic clutch 905 and a distance sensor 906. The motor 901 is installed in a mounting cavity inside the lower positioning seat 4. The output end of the motor 901 is connected with a main gear 902. The lead screw 903 is rotatably connected in a 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 lead screw 903 through a hole and the end part is connected with a sliding piece on the lead screw 903. The end part of the lead screw 903 is installed with a secondary gear 904. The electric automatic clutch 905 is installed in the mounting cavity inside the lower positioning seat 4 and is connected with the main gear 902 and the secondary gear 904 respectively. The electric automatic clutch 905 can be controlled to be connected or disconnected by the controller 10 to establish or break the power output of the main gear 902 to the secondary 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 lower side of the metal sheet. At this time, the distance sensor 906 can detect the distance between the rolling seat 811 and the lower clamping pipe 703, so as to judge whether the pressure ball 121 on the lower clamping pipe 703 is aligned with the pressure ball 121 on the upper clamping pipe 703.

[0064] When the edge finding mechanism 8 finishes finding the edge, the upper pressure ball 121 is in place, the controller 10 controls the motor 901 to start and the electric self-control clutch 905 ensures that all the auxiliary gears 904 can accept the power output of the main gear 902, the motor 901 drives all the lead screws 903 to rotate, and the telescopic frame 6 on the lower positioning seat 4 starts to slide out. When the controller 10 determines that the pressure ball 121 on any clamping pipe 703 is aligned with the pressure ball 121 on the upper clamping pipe 703 through the distance sensor 906, it immediately cuts off the power output of the main gear 902 to the lead screw 903 where the clamping pipe 703 is located through the electric self-control clutch 905. When 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, ensuring that the lower pressure ball 121 can correspond to the position of the upper pressure ball 121, further improving the positioning accuracy of the clamping point.

[0066] The controller 10 is electrically connected with the flow rate sensor 805, the electromagnetic valve 806, the hydraulic part 701, the electromagnet 705, the electric self-control clutch 905, and the distance sensor 906 through wires.

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

[0068] The inner sides of the upper positioning seat 3 and the lower positioning seat 4 are connected with the telescopic frame 6 through the opening of horizontal grooves, which can ensure the stability of the telescopic frame 6 during movement and provide support for the telescopic frame 6 during clamping, improving the clamping effect.

[0069] Working principle: When metal sheets need to be clamped, the electromagnet 705 is powered on to generate enough repulsive force on the permanent magnet 706, then the distance between the two lifting mounting plates 2 is adjusted to separate the two clamping heads of the pre-clamping assembly 5, then the metal sheets are placed between the pre-clamping assembly 5, and the distance between the two lifting mounting plates 2 is reduced until the metal sheets are preliminarily clamped by the pre-clamping assembly 5. At this time, the pressure ball 121 is in contact with the two side surfaces of the metal sheet, the rolling seat 811 is also pressed on the upper surface of the metal sheet to make the slide rod 808 retract into the touch rod 807, and the spring 812 and the return spring 704 are both in compression.

[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 application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A clamping device for metal surface treatment, comprising a mounting frame (1), two lifting mounting plates (2) are movably arranged longitudinally on the side plates of the mounting frame (1), characterized in that: Two said lifting installation plate (2) adjacent side are respectively provided with upper locating seat (3) and lower locating seat (4), be provided with pre-clamping assembly (5) between upper locating seat (3) and lower locating seat (4), still be provided with a plurality of telescopic frame (6) through the upper and lower correspondence of setting up sliding hole in upper locating seat (3) and lower locating seat (4), the end of telescopic frame (6) is provided with clamping assembly (7) for clamping sheet metal, be provided with edge finding mechanism (8) between telescopic frame (6) and clamping assembly (7) on upper locating seat (3), be provided with drive mechanism (9) for driving telescopic frame (6) in lower locating seat (4), be provided with controller (10) on two said lifting installation plate (2); The edge finding mechanism (8) comprises: Air cavity (801), the air cavity (801) is centrally provided in the upper locating seat (3) and is communicated with the sliding hole, the air cavity (801) is connected with the air inlet pipe (802), the end of the telescopic frame (6) on the upper locating seat (3) and the inner side are respectively provided with sliding sealing ring (803) and through air passage (804), the end of the sliding hole of the upper locating seat (3) is further provided with flow sensor (805) and electromagnetic valve (806); Connecting piece (11), the connecting piece (11) is arranged on one side of the upper clamping assembly (7), the outer side of the connecting piece (11) is connected with the touch rod (807), the other end of the touch rod (807) is slidably connected with the sensing slide rod (808) by setting up sliding cavity, a plurality of air release holes (809) are further set up on the arm of the touch rod (807), the telescopic frame (6) and the touch rod (807) are connected with the conduit (810) for communicating the air passage (804) and the sliding cavity in the touch rod (807); Rolling seat (811), the rolling seat (811) is arranged at the lower end of the sensing slide rod (808), the end of the sensing slide rod (808) located outside the touch rod (807) is sleeved with the spring (812).

2. The clamping device for metal surface treatment according to claim 1, characterized by: The clamping assembly (7) comprises: Hydraulic part (701), the hydraulic part (701) is arranged at the end of the telescopic frame (6), the telescopic end of the hydraulic part (701) is provided with a connecting rod (702), the end of the connecting rod (702) is movably provided with a clamping pipe (703), the end of the connecting rod (702) is slidably connected with the sealing cavity on one side of the clamping pipe (703), the outer side of the connecting rod (702) is sleeved with the reset spring (704); The electromagnet (705) is arranged in the clamping pipe (703), the end of the clamping pipe (703) is provided with a rolling part (12), and the positions of the upper and lower rolling parts (12) correspond to each other, the inside of the clamping pipe (703) is movably provided with a permanent magnet (706) matched with the electromagnet (705) for driving the connecting piece (11) and the touch rod (807) to rotate by setting up sliding cavity. An elastic air cover (707) is arranged on the inner wall of the sealing sliding cavity of the clamping pipe (703) to block the air hole, and a control piece (708) connected with the permanent magnet (706) is movably arranged in the sealing sliding cavity of the clamping pipe (703).

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

4. The clamping device for metal surface treatment according to claim 2, characterized by: The rolling part (12) comprises: A pressure ball (121) is movably arranged in a ball groove at the top end of the clamping pipe (703), and a magnetic pressure block (122) matched with the pressure ball (121) is movably arranged in the top end of the clamping pipe (703) through an inner groove.

5. The clamping device for metal surface treatment according to claim 2, characterized by: The driving mechanism (9) comprises: A motor (901) is arranged in a mounting cavity in the lower positioning seat (4), and the output end of the motor (901) is connected with a main gear (902); A lead screw (903) is movably arranged in a sliding hole of the lower positioning seat (4), an extension frame (6) in the sliding hole of the lower positioning seat (4) is sleeved on the lead screw (903) through a hole and connected with a sliding piece on the lead screw (903) at the end, and the end of the lead screw (903) is provided with a secondary gear (904); An electric automatic clutch (905) is arranged in the mounting cavity in the lower positioning seat (4) and connected with the main gear (902) and the secondary gear (904); A distance sensor (906) is arranged on the rolling seat (811).

6. The clamping device for metal surface treatment according to claim 5, characterized by: The controller (10) is electrically connected with the flow rate sensor (805), the electromagnetic valve (806), the hydraulic part (701), the electromagnet (705), the electric automatic clutch (905) and the distance sensor (906) through wires.

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

8. The clamping device for metal surface treatment according to claim 1, characterized by: The inner sides of the upper positioning seat (3) and the lower positioning seat (4) are slidably connected with the extension frame (6) through a horizontal groove.

Images