Rapid positioning clamp for plate machining

Abstract

The invention provides a rapid positioning clamp for plate machining, belongs to the technical field of clamps, and aims to solve the problem that when an existing positioning clamp adsorbs and fixes spliced automobile plates through suction cups, when the plates are pushed to be folded for welding, suction of the suction cups is prone to loosening, and the plates fall off. Comprising a mounting base, a fixing frame, a mounting plate and other components, electric lifting rods, positioning plates and positioning suction cups are evenly arranged at the bottom of the mounting plate at intervals, automobile sheets can be adsorbed and fixed, an L-shaped baffle and a limiting rod piece can limit the edges of the sheets, accurate welding is ensured, and a hydraulic pushing rod piece, an auxiliary piece and an auxiliary supporting plate are matched with one another; the hydraulic telescopic rod pushes the extruding and pushing wheel to be attached to the outer side edge of a plate, the extruding and pushing wheel drives the adjusting rope to enable the positioning shaft to rotate, then the clamping plate slides to the bottom to clamp and fix the plate, the clamping plate and the positioning suction cup jointly guarantee stable welding work, the problem that the plate falls off due to suction loosening of the suction cup is effectively solved, and use is convenient and fast.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, in particular to a quick positioning clamp for sheet material processing. Background Art

[0002] In the field of automobile manufacturing, sheet metal processing is of vital importance. With the rapid development of the automobile industry, the requirements for automobile quality, performance and production efficiency are constantly increasing, which has also prompted the emergence of fast positioning fixtures for sheet metal processing in automobile manufacturing. Existing positioning fixtures generally use suction cups to absorb and fix the manually assembled and spliced ​​sheets, and then close them before welding.

[0003] For example, the patent with publication number CN213530372U discloses a vacuum suction cup positioning fixture, which includes a bottom plate, a suction hole is opened on the bottom plate, one side of the bottom plate is connected to a suction device connected to the suction hole, and the other side is connected to a sealing layer, the sealing layer covers the suction hole, and the sealing layer is connected to the product on the side away from the bottom plate. This application has the effect of reducing the impact of waste on product quality, and can also clamp multiple similar products for processing. Then, after the existing positioning fixture uses the suction cup to absorb and splice the sheet material, and then pushes all the sheet materials together for welding, it is easy to cause the suction effect of the suction cup on the sheet material to be unstable, thereby causing the sheet material to fall and thus affecting the welding process of the automobile sheet material.

[0004] Therefore, a quick positioning fixture for sheet metal processing is introduced. Summary of the invention

[0005] The purpose of the present invention is to provide a quick positioning fixture for sheet metal processing, aiming to solve the problem in the above-mentioned background technology that when the existing positioning fixture uses a suction cup to fix the spliced ​​automobile sheets, the suction cup is easily loosened when the sheets are pushed together for welding, causing the sheets to fall off.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rapid positioning fixture for sheet metal processing, comprising a mounting seat and a fixed frame fixedly connected to the bottom of the mounting seat, the lower end of the fixed frame is fixedly connected to a mounting plate, the bottom of the mounting plate is evenly fixedly connected to an electric lifting rod, the lower end of the electric lifting rod is fixed to a plurality of positioning plates, adjacent positioning plates are arranged in the shape of an automobile door ring, the positioning plate is fixedly connected to a positioning suction cup, the bottom of the positioning suction cup adsorbs and fixes the automobile sheet metal to be welded, the bottom of the mounting plate outside the automobile sheet metal is evenly fixedly connected to a hydraulic pushing rod at intervals, the end of the hydraulic pushing rod is fixedly connected to an auxiliary part; the auxiliary part comprises a U-shaped plate fixedly connected to the end of the hydraulic pushing rod and a limiting hole opened on the bottom plate of the U-shaped plate, a movable hanging column is movably engaged in the limiting hole, an extrusion wheel is sleeved on the outer wall of the movable hanging column between the upper and lower bottom plates of the U-shaped plate, and an auxiliary support plate is movably provided on the top of the lower bottom plate of the U-shaped plate;

[0007] The auxiliary support plate includes a positioning box and a fixed column fixedly connected to the side wall of the positioning box, the top of the fixed column is fixedly connected to the bottom of the lower bottom plate of the U-shaped plate, the inner bottom plate of the positioning box is movably connected with a positioning shaft, the top plate of the positioning shaft extends through and extends to the outside of the top plate of the positioning box, a fixed sleeve is provided on the outer wall of the positioning shaft in the positioning box, the outer end of the clockwork spring is fixedly adjacent to the inner wall of the positioning box, an adjusting rope is wound on the outer wall of the positioning shaft below the clockwork spring, the other end of the adjusting rope passes through the side wall of the positioning box and the lower bottom plate of the U-shaped plate, and the rear end is fixedly connected to the bottom of the movable hanging column, and a rotating plate is fixedly connected to the outer wall of the positioning shaft above the positioning box, the top of the end of the rotating plate is evenly fixedly connected to the support spring, and the top of the support spring is fixedly connected to the clamping plate.

[0008] Furthermore, the fixing columns are evenly spaced and distributed on three-quarters of the circumferential arc outer wall of the positioning box, and the positioning box is fixed to the middle edge of the lower end of the bottom plate of the U-shaped plate away from the hydraulic push rod through the fixing columns.

[0009] Furthermore, the top of the rotating plate is arranged to fit the bottom surface of the bottom plate under the U-shaped plate, and when the movable hanging column is located at the end of the limiting hole away from the side of the hydraulic push rod, the rotating plate is arranged perpendicular to the movable hanging column. At this time, the clockwork spring maintains a normal relaxed state.

[0010] Furthermore, the clockwork spring maintains a normal relaxed state, the clamping plate is located on one side of the U-shaped plate, and the top surface of the clamping plate is set at a height higher than the top surface of the bottom plate under the U-shaped plate, and downwardly inclined side plates are fixedly connected to both sides of the clamping plate.

[0011] Furthermore, rollers are movably engaged with each other at evenly spaced intervals on the top of the clamping plate, a hollow cavity is provided inside the clamping plate adjacent to the rollers, a worm is fixedly connected to the outer wall on one side of the roller, the worm extends through the hollow cavity, a worm wheel is rotatably provided inside the hollow cavity, the worm wheel is meshed with the worm, and a threaded hole is provided in the middle of the worm wheel, a guide channel is provided at the top of the clamping plate corresponding to the threaded hole, a positioning screw is movably sleeved in the threaded hole, and the top end of the positioning screw is movably engaged in the guide channel.

[0012] Furthermore, an annular inner groove is opened on the outer wall in the middle of the extrusion and pushing wheel, and two groups of identical elastic components are fixedly connected in parallel on the inner wall of the side plate between the upper and lower bottom plates of the U-shaped plate. The ends of the elastic components are fixedly connected to arc-shaped plates, and the arc-shaped plates are movably engaged with the arc-shaped outer walls on the upper and lower sides of the annular inner groove on the extrusion and pushing wheel.

[0013] Furthermore, installation cavities are evenly spaced inside the pushing wheel at the annular inner groove, a sliding groove is provided on the inner wall of the installation cavity away from one end of the annular inner groove, return springs are fixedly connected to the inner walls at the upper and lower ends of the installation cavity adjacent to the sliding groove, and movable splints are fixedly connected to the ends of the return springs, and the movable splints are movably engaged in the sliding grooves, and limiting grooves are respectively provided on the side walls adjacent to the installation cavity and the annular inner groove at locations corresponding to the movable splints, and the other end of the movable splint is movably engaged in the limiting groove and then the end extends into the annular inner groove.

[0014] The U-shaped rod is movably engaged in the movable groove on the movable splint inside the annular inner groove, and the support rods at the upper and lower ends of the U-shaped rod movably penetrate the side walls of the mounting cavity outside the limiting groove, and the ends of the support rods at the upper and lower ends of the U-shaped rod extend into the mounting cavity, and the ends of the support rods in the mounting cavity are fixedly connected to the movable plate, the movable plate movably engages in the movable groove, and the upper and lower ends of the movable plate are respectively attached to the upper and lower inner walls of the mounting cavity, a wire bobbin is fixedly connected to the inner wall of the mounting cavity between the limiting grooves, and traction ropes are respectively fixedly connected to the movable splints on the upper and lower sides of the wire bobbin, the traction rope penetrates the upper and lower side walls of the wire bobbin and then passes through the port at the end of the wire bobbin, and the end of the traction rope passes through the port of the wire bobbin and is fixedly connected to the side wall of the movable plate.

[0015] Furthermore, the hydraulic pushing rod includes a fixed seat fixedly connected to the bottom of the mounting plate and a hydraulic cylinder fixedly connected to the bottom of the fixed seat, the output end of the hydraulic cylinder is fixedly connected to a hydraulic telescopic rod, the end of the hydraulic telescopic rod is fixedly connected to a reinforcing plate, the end of the reinforcing plate is fixedly connected to the auxiliary part, and the bottom of the mounting plate outside the hydraulic cylinder is fixedly connected to a U-shaped shield.

[0016] Furthermore, L-shaped baffles are evenly spaced and fixedly connected to the bottom of the mounting plates on both sides of the positioning plate, and limiting rods are fixedly connected to the bottom of the mounting plates between the gaps of adjacent positioning plates. The limiting rods include a U-shaped seat fixedly connected to the bottom of the mounting plate and a positioning rod fixedly connected to the side walls at both ends of the U-shaped seat. A covering plate is sleeved on the outer wall of the positioning rod, and an electric telescopic push rod is fixedly connected to the lower end of the top plate of the U-shaped seat between the positioning rods. A through hole is opened on the covering plate at a position corresponding to the electric telescopic push rod, the lower end of the electric telescopic push rod extends into the through hole, and a calibration baffle is fixedly connected to the bottom of the electric telescopic push rod in the through hole.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention proposes a quick positioning fixture for sheet metal processing, which absorbs and fixes automobile sheet metal through components such as a mounting seat, a fixing frame, a mounting plate and a positioning suction cup, the L-shaped baffle plate limits the edge of the sheet metal, and the calibration baffle plate of the limit rod allows the sheet metal to form a basic splicing shape, which is conducive to precise welding. After the sheet metal is absorbed and fixed, the hydraulic telescopic rod pushes the squeezing and pushing wheel to fit the outer edge of the sheet metal, and the squeezing and pushing wheel drives the adjusting rope to rotate the positioning shaft to contract the clockwork spring, and the rotating plate drives the clamping plate to slide to the bottom to clamp and fix the sheet metal. In this way, when the sheet metal moves, closes and splices, the clamping plate and the positioning suction cup jointly prevent the sheet metal from falling, thereby ensuring that the welding work is carried out stably. It is easy to use, can improve the efficiency and quality of automobile sheet metal processing, and provide reliable support for automobile manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention in an upright state;

[0020] Figure 2 It is a schematic diagram of the overall inverted state structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the installation structure of the mounting plate, the positioning plate and the hydraulic push rod of the present invention;

[0022] Figure 4 It is a schematic diagram of the installation structure of the hydraulic push rod and auxiliary parts of the present invention;

[0023] Figure 5 It is a schematic diagram of the auxiliary component structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the auxiliary support plate structure of the present invention;

[0025] Figure 7 It is a schematic cross-sectional view of the positioning box of the present invention;

[0026] Figure 8 It is a schematic cross-sectional view of the extrusion and pushing wheel of the present invention;

[0027] Fig. 9 It is a cross-sectional schematic diagram of the movable splint of the present invention;

[0028] Fig.10 It is a schematic diagram of a limiting rod of the present invention;

[0029] Fig.11 It is a partial cross-sectional schematic diagram of the clamping plate of the present invention.

[0030] In the figure: 1. mounting seat; 2. fixing frame; 3. mounting plate; 31. electric lifting rod; 32. positioning plate; 33. positioning suction cup; 4. automobile sheet; 5. hydraulic push rod; 51. fixing seat; 52. hydraulic cylinder; 53. hydraulic telescopic rod; 54. reinforcing plate; 6. U-shaped shield; 7. auxiliary parts; 71. U-shaped plate; 72. limiting hole; 73. mobile hanging column; 74. pushing wheel; 741. mounting cavity; 742. reset spring; 743. mobile splint; 744. limiting slot; 745. movable slot; 746. U-shaped rod; 747. mobile plate; 748. cable drum; 749, traction rope; 75, auxiliary support plate; 751, positioning box; 752, fixing column; 753, positioning shaft; 754, clockwork spring; 755, adjustment rope; 756, rotating plate; 757, supporting spring; 758, clamping plate; 7581, roller; 7582, worm; 7583, worm wheel; 7584, guide channel; 7585, positioning screw; 76, elastic component; 77, arc plate; 8, limit rod; 81, U-shaped seat; 82, positioning rod; 83, covering plate; 84, electric telescopic push rod; 85, through hole; 86, calibration stop rod; 9, L-shaped baffle. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 3 and Fig.10A quick positioning fixture for sheet metal processing, the fixture consists of a mounting seat 1, a fixing frame 2, a mounting plate 3, an electric lifting rod 31, a positioning plate 32 and a positioning suction cup 33. The bottom of the mounting seat 1 is fixedly connected with a square fixing frame 2, the lower end of the fixing frame 2 is fixedly connected with a mounting plate 3 with a square structure, the bottom of the mounting plate 3 is evenly fixedly connected with electric lifting rods 31, the lower end of the electric lifting rod 31 is fixed with a plurality of positioning plates 32, and adjacent positioning plates 32 are arranged in the shape of a car door ring, the positioning plate 32 is fixedly connected with a positioning suction cup 33, and the bottom of the positioning suction cup 33 adsorbs and fixes a car sheet 4 to be welded, and the car sheet 4 can be welded into a car door ring after splicing.

[0033] The bottom of the mounting plates 3 on both sides of the positioning plates 32 are evenly spaced and fixedly connected with L-shaped baffles 9, which are used to limit the edge of the automobile sheet 4 extending to the outside of the positioning plates 32. The bottom of the mounting plates 3 between the gaps of adjacent positioning plates 32 is fixedly connected with a limiting rod 8, and the limiting rod 8 includes a U-shaped seat 81 fixedly connected to the bottom of the mounting plate 3 and a positioning rod 82 fixedly connected to the side walls at both ends of the U-shaped seat 81. A cover plate 83 is sleeved on the outer wall of the positioning rod 82. The lower end of the top plate of the U-shaped seat 81 between the positioning rods 82 is fixedly connected with an electric telescopic push rod 84, and the cover plate 83 corresponds to the electric telescopic push rod 84. A through hole 85 is opened at the place, and the lower end of the electric telescopic push rod 84 extends into the through hole 85, and the bottom of the electric telescopic push rod 84 in the through hole 85 is fixedly connected with a calibration stop rod 86, and the calibration stop rod 86 is erected side by side between the gaps of adjacent automobile sheets 4, so that the automobile sheets 4 can form a basic splicing shape with a small spacing after fitting the outer wall of the calibration stop rod 86, so that after the electric telescopic push rod 84 controls the calibration stop rod 86 to rise and withdraw from the gap of the automobile sheet 4, when the outer side of the automobile sheet 4 is pushed to gather and fit in the middle, the automobile sheet 4 is prevented from excessive deviation and deformation, which is conducive to the precise welding of the automobile sheet 4.

[0034] In order to solve the problem that when the existing positioning fixture uses a suction cup to fix the spliced ​​automobile sheet 4, the suction cup is easily loosened when the sheet is pushed together for welding, causing the sheet to fall off. Figure 1-Figure 7 , provide the following preferred technical solutions:

[0035] The bottom of the mounting plate 3 outside the automobile sheet material 4 is evenly and fixedly connected with hydraulic push rods 5, the hydraulic push rods 5 include a fixed seat 51 fixedly connected to the bottom of the mounting plate 3 and a hydraulic cylinder 52 fixedly connected to the bottom of the fixed seat 51, the output end of the hydraulic cylinder 52 is fixedly connected with a hydraulic telescopic rod 53, the end of the hydraulic telescopic rod 53 is fixedly connected with a reinforcing plate 54, the end of the reinforcing plate 54 is fixedly connected to the auxiliary component 7, the bottom of the mounting plate 3 outside the hydraulic cylinder 52 is fixedly connected with a U-shaped shield 6, the U-shaped shield 6 covers the outside of the fixing seat 51 and the hydraulic cylinder 52 to isolate and protect them, the auxiliary component 7 includes a U-shaped plate 71 fixedly connected to the end of the hydraulic push rod 5 and a limiting hole 72 opened on the upper bottom plate of the U-shaped plate 71, a movable hanging column 73 is movably engaged in the limiting hole 72, an extrusion wheel 74 is sleeved on the outer wall of the movable hanging column 73 between the upper and lower bottom plates of the U-shaped plate 71, and an auxiliary support plate 75 is movably provided on the top of the lower bottom plate of the U-shaped plate 71;

[0036] The auxiliary support plate 75 includes a positioning box 751 and a fixing column 752 fixedly connected to the side wall of the positioning box 751. The top of the fixing column 752 is fixedly connected to the bottom of the lower bottom plate of the U-shaped plate 71. A positioning shaft 753 is movably connected to the inner bottom plate of the positioning box 751. The top plate of the positioning shaft 753 extends through and extends to the outside of the top plate of the positioning box 751. A spring spring 754 is fixedly sleeved on the outer wall of the positioning shaft 753 in the positioning box 751. The outer end of the spring spring 754 is connected to the inner wall of the positioning box 751. Fixed adjacent, an adjusting rope 755 is wound on the outer wall of the positioning shaft 753 below the clockwork spring 754, the other end of the adjusting rope 755 passes through the side wall of the positioning box 751 and the lower bottom plate of the U-shaped plate 71 and the rear end is fixedly connected to the bottom of the movable hanging column 73, and a rotating plate 756 is fixedly connected to the outer wall of the positioning shaft 753 above the positioning box 751, and the top end of the rotating plate 756 is evenly fixedly connected to the supporting springs 757, and the top of the supporting spring 757 is fixedly connected to the clamping plate 758.

[0037] The fixed columns 752 are evenly spaced on the outer wall of the circumferential arc surface of three quarters of the positioning box 751, and the positioning box 751 is fixed to the middle edge of the lower end of the lower bottom plate of the U-shaped plate 71 away from the hydraulic push rod 5 through the fixed columns 752; the top end of the rotating plate 756 is arranged to fit the bottom surface of the lower bottom plate of the U-shaped plate 71, and when the movable hanging column 73 is located at the end of the limiting hole 72 away from the hydraulic push rod 5, the rotating plate 756 is arranged perpendicular to the movable hanging column 73. At this time, the clockwork spring 754 maintains a normal relaxation state.

[0038] The clockwork spring 754 maintains a normal relaxed state, the clamping plate 758 is located on one side of the U-shaped plate 71, and the top surface of the clamping plate 758 is set at a height higher than the top surface of the lower bottom plate of the U-shaped plate 71, and the two sides of the clamping plate 758 are respectively fixedly connected with downwardly inclined side plates.

[0039] Specifically, when the worker uses the positioning suction cup 33 to absorb and fix the automobile sheet material 4 in advance, and makes the automobile sheet material 4 fit each other with the outer wall of the limiting rod 8 to form a basic splicing shape, when it is necessary to weld the automobile sheet material 4, the electric telescopic push rod 84 is used to control the calibration stop rod 86 to rise and pull it out of the gap of the automobile sheet material 4, and the hydraulic telescopic rod 53 is driven to extend by the hydraulic telescopic rod 53. The hydraulic telescopic rod 53 pushes the squeezing and pushing wheel 74 between the U-shaped plates 71 to fit the outer edge of the automobile sheet material 4. Due to the absorption and fixation of the positioning suction cup 33, the squeezing and pushing wheel 74 is subjected to a reverse thrust so that the limiting hole 72 on the upper bottom plate of the U-shaped plate 71 through the moving hanging column 73 is moved, and the squeezing and pushing wheel 74 moves to the side plate of the U-shaped plate 71. During the movement of the squeezing and pushing wheel 74, the adjusting rope 755 is driven to move, and the adjusting rope 755 pushes the positioning shaft 753 to rotate in the positioning box 751 to contract the clockwork spring 754. When the positioning shaft 753 rotates, The rotating plate 756 on one side of the U-shaped plate 71 rotates and moves toward the bottom of the automobile sheet 4, and the clamping plate 758 at the top of the end of the rotating plate 756 is guided by the inclined side walls on the outer walls on both sides to slide from the edge of the automobile sheet 4 to the bottom of the automobile sheet 4, and under the action of the support spring 757, the support spring 757 is used to clamp and fix the automobile sheet 4. After the clamping is completed, the hydraulic telescopic rod 53 continues to use the U-shaped plate 71 to cooperate with the pushing wheel 74 to move the automobile sheet 4 adsorbed and fixed by the positioning suction cup 33 toward the center direction of the arrangement shape of the positioning plate 32, so that the edges of the adjacent automobile sheets 4 are completely fitted, and the clamping plate 758 extends into the bottom of the automobile sheet 4 to cooperate with the positioning suction cup 33 for clamping, so as to prevent the hydraulic telescopic rod 53 from pushing the automobile sheet 4 to move, close and splice. The positioning suction cup 33 is unstable and the sheet falls off. This is conducive to the stable welding of the automobile sheet 4 and is convenient to use.

[0040] In order to prevent the clamping plate 758 from scratching the bottom of the automobile sheet 4 when it rotates and moves with the rotating plate 756, as shown in FIG. Fig.11 As shown, this implementation provides the following preferred technical solutions:

[0041] Rollers 7581 are evenly spaced and movably engaged with each other on the top of the clamping plate 758, and the top ends of the rollers 7581 extend to the top of the clamping plate 758, and a hollow cavity is provided inside the clamping plate 758 adjacent to the rollers 7581, and a worm 7582 is fixedly connected to the outer wall of one side of the rollers 7581, and the worm 7582 extends through the hollow cavity, and a worm wheel 7583 is rotatably provided inside the hollow cavity, the worm wheel 7583 is meshed with the worm 7582, and a threaded hole is provided in the middle of the worm wheel 7583, and a guide channel 7584 is provided at the top of the clamping plate 758 corresponding to the threaded hole, and a positioning screw 7585 is movably sleeved in the threaded hole, and the top end of the positioning screw 7585 is movably engaged in the guide channel 7584.

[0042] The worm gear 7583 of the embodiment of the present invention is the worm gear 7584 of the embodiment of the present invention, and the worm gear 7583 of the embodiment of the present invention is the worm gear 7584 of the embodiment of the present invention.

[0043] In order to further ensure the stability of the automobile sheet 4 being pushed and spliced ​​together, Figure 4 , Figure 5 and Figure 8-Figure 9 As shown, this implementation provides the following preferred technical solutions:

[0044] An annular inner groove is provided on the outer wall in the middle of the squeezing and pushing wheel 74. Two groups of identical elastic components 76 are fixedly connected in parallel on the inner wall of the side plate between the upper and lower bottom plates of the U-shaped plate 71. The ends of the elastic components 76 are fixedly connected to an arc plate 77. The arc plate 77 is movably engaged with the arc outer walls on the upper and lower sides of the annular inner groove on the squeezing and pushing wheel 74.

[0045] The pushing wheel 74 at the annular inner groove is provided with mounting cavities 741 at evenly spaced intervals. A sliding groove is provided on the inner wall of the mounting cavity 741 away from one end of the annular inner groove. Reset springs 742 are fixedly connected to the inner walls of the upper and lower ends of the mounting cavity 741 adjacent to the sliding groove. The ends of the reset springs 742 are fixedly connected to movable splints 743. The movable splints 743 are movably engaged in the sliding groove. Limiting grooves 744 are respectively provided on the side walls adjacent to the mounting cavity 741 and the annular inner groove at locations corresponding to the movable splint 743. The other end of the movable splint 743 is movably engaged in the limiting groove 744 and then the end extends into the annular inner groove.

[0046] A movable groove 745 is provided downwardly through the middle of the top of the movable splint 743, and a U-shaped rod 746 is movably engaged in the movable groove 745 on the movable splint 743 inside the annular inner groove. The support rods at the upper and lower ends of the U-shaped rod 746 movably penetrate the side wall of the installation cavity 741 outside the limiting groove 744, and the ends of the support rods at the upper and lower ends of the U-shaped rod 746 extend into the installation cavity 741. The ends of the support rods of the U-shaped rod 746 in the installation cavity 741 are fixedly connected to a movable plate 747, and the movable plate 747 is movably engaged with the movable plate 747. The movable plate 747 is in the groove 745, and the upper and lower ends of the movable plate 747 are respectively arranged to fit the upper and lower inner walls of the mounting cavity 741. A wire bundle 748 is fixedly connected to the inner wall of the mounting cavity 741 between the limit grooves 744. A traction rope 749 is respectively fixedly connected to the movable clamping plates 743 on the upper and lower sides of the wire bundle 748. The traction rope 749 passes through the upper and lower side walls of the wire bundle 748 and then passes out from the port at the end of the wire bundle 748. The end of the traction rope 749 passes through the port of the wire bundle 748 and is fixedly connected to the side wall of the movable plate 747.

[0047] Specifically, the hydraulic telescopic rod 53 is driven to extend under the control of the hydraulic telescopic rod 53, and the hydraulic telescopic rod 53 pushes the squeezing wheel 74 to fit the outer side of the automobile sheet 4, so that the annular inner groove of the squeezing wheel 74 engages the outer wall of the automobile sheet 4, thereby making the movable clamping plate 743 suspended at the upper and lower ends of the edge of the automobile sheet 4. In the process of the squeezing wheel 74 moving toward the automobile sheet 4, the U-shaped rod 746 is gradually subjected to the reverse thrust and moves toward the side of the installation cavity 741. The ends of the support rods at the upper and lower ends of the U-shaped rod 746 push the movable plate 747 to move toward the reset spring 742 in the installation cavity 741, and the movable plate 747 moves When the traction rope 749 is moved, the traction rope 749, under the guidance of the limit position of the cable tie barrel 748, pulls the movable clamping plates 743 on the upper and lower sides of the cable tie barrel 748 to move toward each other to stretch the reset spring 742, and the end of the movable clamping plate 743 moves close to each other in the limit position groove 744 on the inner wall of the annular inner groove, and finally fits the upper and lower outer walls of the edge of the automobile sheet 4 respectively, thereby automatically realizing the clamping and fixing of the automobile sheet 4 by the movable clamping plate 743, further ensuring the stability of the automobile sheet 4 when the hydraulic telescopic rod 53 pushes the automobile sheet 4 to move, close and splice.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although 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 the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A quick positioning fixture for sheet metal processing, comprising a mounting seat (1) and a fixing frame (2) fixedly connected to the bottom of the mounting seat (1), wherein the lower end of the fixing frame (2) is fixedly connected to a mounting plate (3), characterized in that: The bottom of the mounting plate (3) is evenly spaced and fixedly connected to electric lifting rods (31), the lower end of the electric lifting rods (31) is fixed to a plurality of positioning plates (32), adjacent positioning plates (32) are arranged in the shape of a car door ring, the positioning plates (32) are fixedly connected to positioning suction cups (33), the bottom of the positioning suction cups (33) adsorbs and fixes the car sheet (4) to be welded, and the bottom of the mounting plate (3) outside the car sheet (4) is evenly spaced and fixedly connected to hydraulic push rods (5), the hydraulic The end of the hydraulic push rod (5) is fixedly connected with an auxiliary component (7); the auxiliary component (7) comprises a U-shaped plate (71) fixedly connected to the end of the hydraulic push rod (5) and a limiting hole (72) provided on the upper bottom plate of the U-shaped plate (71); a movable hanging column (73) is movably engaged in the limiting hole (72); an extrusion wheel (74) is sleeved on the outer wall of the movable hanging column (73) between the upper and lower bottom plates of the U-shaped plate (71); and an auxiliary supporting plate (75) is movably provided on the top of the lower bottom plate of the U-shaped plate (71); The auxiliary support plate (75) comprises a positioning box (751) and a fixing column (752) fixedly connected to the side wall of the positioning box (751); the top of the fixing column (752) is fixedly connected to the bottom of the lower bottom plate of the U-shaped plate (71); a positioning shaft (753) is movably connected to the inner bottom plate of the positioning box (751); the top plate of the positioning shaft (753) extends through and extends to the outside of the top plate of the positioning box (751); a spring spring (754) is fixedly sleeved on the outer wall of the positioning shaft (753) in the positioning box (751); the outer end of the spring spring (754) is connected to the positioning box (751) The inner walls are fixedly adjacent, an adjusting rope (755) is wound on the outer wall of the positioning shaft (753) below the clockwork spring (754), the other end of the adjusting rope (755) passes through the side wall of the positioning box (751) and the lower bottom plate of the U-shaped plate (71), and the rear end is fixedly connected to the bottom of the movable hanging column (73), and a rotating plate (756) is fixedly connected to the outer wall of the positioning shaft (753) above the positioning box (751), and the top of the end of the rotating plate (756) is evenly spaced and fixedly connected to the supporting spring (757), and the top of the supporting spring (757) is fixedly connected to the clamping plate (758).

2. A quick positioning fixture for sheet metal processing as claimed in claim 1, characterized in that: The fixing columns (752) are evenly spaced and distributed on three-quarters of the circumferential arc surface outer wall of the positioning box (751), and the positioning box (751) is fixed to the middle edge of the lower end of the lower bottom plate of the U-shaped plate (71) away from the hydraulic push rod (5) through the fixing columns (752).

3. A quick positioning fixture for sheet metal processing as claimed in claim 2, characterized in that: The top end of the rotating plate (756) is arranged to fit the bottom surface of the lower base plate of the U-shaped plate (71), and when the movable hanging column (73) is located at the end of the limiting hole (72) away from the hydraulic push rod (5), the rotating plate (756) is arranged perpendicular to the movable hanging column (73), and at this time, the spring (754) maintains a normal relaxed state.

4. A quick positioning fixture for sheet metal processing as claimed in claim 3, characterized in that: The spring (754) is kept in a normal relaxed state. The clamping plate (758) is located on one side of the U-shaped plate (71). The top surface of the clamping plate (758) is set at a height higher than the top surface of the bottom plate of the U-shaped plate (71). The two sides of the clamping plate (758) are respectively fixedly connected with downwardly inclined side plates.

5. A quick positioning fixture for sheet metal processing as claimed in claim 1, characterized in that: Rolling plates (7581) are evenly spaced and movably engaged with each other at the top of the clamping plate (758), a hollow cavity is arranged inside the clamping plate (758) adjacent to the rolling plates (7581), a worm (7582) is fixedly connected to the outer wall of one side of the rolling plates (7581), the worm (7582) extends through the hollow cavity, a worm wheel (7583) is rotatably arranged inside the hollow cavity, the worm wheel (7583) is meshed with the worm (7582), and a threaded hole is arranged at the middle of the worm wheel (7583), a guide channel (7584) is opened at the top of the clamping plate (758) corresponding to the threaded hole, a positioning screw (7585) is movably sleeved in the threaded hole, and the top end of the positioning screw (7585) is movably engaged in the guide channel (7584).

6. A quick positioning fixture for sheet metal processing as claimed in claim 1, characterized in that: An annular inner groove is formed on the outer wall of the middle portion of the squeezing and pushing wheel (74); two groups of identical elastic components (76) are fixedly connected in parallel on the inner wall of the side plate between the upper and lower bottom plates of the U-shaped plate (71); the ends of the elastic components (76) are fixedly connected to an arc-shaped plate (77); the arc-shaped plate (77) is movably engaged with the arc-shaped outer walls on the upper and lower sides of the annular inner groove on the squeezing and pushing wheel (74).

7. A quick positioning fixture for sheet metal processing as claimed in claim 6, characterized in that: The pushing wheel (74) at the annular inner groove is provided with mounting cavities (741) at even intervals. A sliding groove is provided on the inner wall of the mounting cavity (741) away from one end of the annular inner groove. Restoration springs (742) are fixedly connected to the inner walls of the upper and lower ends of the mounting cavity (741) adjacent to the sliding groove. The ends of the restoring springs (742) are fixedly connected to movable clamping plates (743). The movable clamping plates (743) are movably engaged in the sliding groove. Limiting grooves (744) are provided on the side walls of the mounting cavity (741) adjacent to the annular inner groove at locations corresponding to the movable clamping plates (743). After the other end of the movable clamping plate (743) is movably engaged in the limiting groove (744), the end thereof extends into the annular inner groove.

8. A quick positioning fixture for sheet metal processing as claimed in claim 7, characterized in that: A movable groove (745) is provided downwardly through the middle of the top of the movable splint (743), and a U-shaped rod (746) is movably engaged in the movable groove (745) on the movable splint (743) inside the annular inner groove. The support rods at the upper and lower ends of the U-shaped rod (746) movably penetrate the side wall of the installation cavity (741) outside the limiting groove (744), and the ends of the support rods at the upper and lower ends of the U-shaped rod (746) extend into the installation cavity (741), and the ends of the support rods of the U-shaped rod (746) in the installation cavity (741) are fixedly connected to a movable plate (747), and the movable plate (747) is movably engaged with the movable plate (747). The movable plate (747) is arranged in the groove (745), and the upper and lower ends of the movable plate (747) are respectively arranged to fit the upper and lower inner walls of the mounting cavity (741). A cable drum (748) is fixedly connected to the inner wall of the mounting cavity (741) between the limiting grooves (744). A traction rope (749) is respectively fixedly connected to the movable clamping plates (743) on the upper and lower sides of the cable drum (748). The traction rope (749) passes through the upper and lower side walls of the cable drum (748) and then passes out from the port at the end of the cable drum (748). The end of the traction rope (749) passes through the port of the cable drum (748) and then is fixedly connected to the side wall of the movable plate (747).

9. A quick positioning fixture for sheet metal processing as claimed in claim 1, characterized in that: The hydraulic push rod (5) comprises a fixing seat (51) fixedly connected to the bottom of the mounting plate (3) and a hydraulic cylinder (52) fixedly connected to the bottom of the fixing seat (51); the output end of the hydraulic cylinder (52) is fixedly connected to a hydraulic telescopic rod (53); the end of the hydraulic telescopic rod (53) is fixedly connected to a reinforcing plate (54); the end of the reinforcing plate (54) is fixedly connected to an auxiliary component (7); and the bottom of the mounting plate (3) outside the hydraulic cylinder (52) is fixedly connected to a U-shaped protective cover (6).

10. A quick positioning fixture for sheet metal processing as claimed in claim 1, characterized in that: The bottom of the mounting plates (3) on both sides of the positioning plate (32) are evenly spaced and fixedly connected with L-shaped baffles (9); the bottom of the mounting plates (3) between the gaps of adjacent positioning plates (32) is fixedly connected with a limiting rod (8); the limiting rod (8) comprises a U-shaped seat (81) fixedly connected to the bottom of the mounting plate (3) and a positioning rod (82) fixedly connected between the side walls at both ends of the U-shaped seat (81); a cover plate (83) is sleeved on the outer wall of the positioning rod (82); the lower end of the top plate of the U-shaped seat (81) between the positioning rods (82) is fixedly connected with an electric telescopic push rod (84); a through hole (85) is opened on the cover plate (83) corresponding to the electric telescopic push rod (84); the lower end of the electric telescopic push rod (84) extends into the through hole (85); and the bottom of the electric telescopic push rod (84) in the through hole (85) is fixedly connected with a calibration baffle rod (86).

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