CN111151958A - Clamping mechanism for large sheet-shaped workpiece for welding - Google Patents
Clamping mechanism for large sheet-shaped workpiece for welding Download PDFInfo
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- CN111151958A CN111151958A CN202010116371.1A CN202010116371A CN111151958A CN 111151958 A CN111151958 A CN 111151958A CN 202010116371 A CN202010116371 A CN 202010116371A CN 111151958 A CN111151958 A CN 111151958A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0408—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work for planar work
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Abstract
A clamping mechanism for welding large sheet-shaped workpieces comprises: work piece clamping device and centre gripping drive arrangement, its characterized in that: the workpiece clamping device comprises a workpiece adsorption device and a stop mechanism, the stop mechanism is arranged at the lower end of the workpiece adsorption device, the stop mechanism and the workpiece adsorption device are connected with each other through screws, the workpiece clamping device is of a symmetrical structure, the workpiece clamping device is respectively arranged on two sides of a workpiece and used for clamping and adsorbing the workpiece, the clamping driving device comprises a cam crank mechanism and a shell which plays a supporting role, the cam crank mechanism is arranged in the shell and used for adjusting the clamping degree of the workpiece clamping device, and the cam crank mechanism comprises a cam and a crank connecting rod mechanism.
Description
Technical Field
The invention relates to the field of welding tool fixtures, in particular to a clamping mechanism for a large sheet workpiece for welding, and the IPC classification number of the clamping mechanism is B23K 37/04.
Background
At present, with the rapid development of scientific and industrial technologies, industrial manufacturing technologies have revolutionary breakthroughs, the performance of corresponding equipment such as processing, manufacturing, detection, experiments and the like is more and more powerful, various clamping devices can be used in human life and work, and the application range of the clamping devices is wider and wider. The clamping device is a device for fixing a processing object to occupy a correct position for receiving construction or detection in a mechanical manufacturing process, and is also called a fixture. In a broad sense, any device used to quickly, conveniently and safely mount a workpiece at any stage in a process may be referred to as a clamping device. The clamping device is an indispensable technological device in machining, and can play the following roles: the requirements of various processing precision can be stably and reliably met; the processing working hours are shortened, and the labor productivity is improved; the production cost is reduced; the labor intensity of an operator is reduced; the clamping device can be processed by operators with lower technical grade, but the clamping process of the workpieces or parts matched with the clamping device at present cannot make adaptive progress, along with the implementation of various large-scale projects, the clamping requirements of the large-scale parts and parts such as integral processing, detection, movement, fixation and the like are increasingly prominent, and the existing workpiece clamping mode is difficult to completely meet the requirements.
For example, when the whole large sheet-shaped workpiece is clamped, a plurality of common problems exist: the problems of inconvenient operation, poor flexibility, lack of safety, low efficiency and the like; in the clamping process, the surface of a large sheet-shaped workpiece is possibly damaged by a clamping mode at a local convex position, or clamping force is uneven, and a clamping surface and the surface of the workpiece are relatively displaced, currently, in the technical field of welding, a manipulator mode is mostly adopted for clamping the workpiece, for example, Chinese patent CN203697022U discloses a delicate manipulator clamp, a cylinder pushes a double-sided rack to act, so that a first gear assembly and a second gear assembly which are meshed and connected with the double-sided rack are driven to work, the first gear assembly and the second gear assembly respectively drive a first movable rack and a second movable rack to move, so that a first clamping claw and a second clamping claw clamp or put down articles;
for example, chinese patent CN201811646636.8 discloses a hoisting clamping mechanism, in which two clamping rods are kept in a state of deflecting toward the concave surface of an arc plate under the action of a torsion spring; when a pipe needs to be hoisted, the pipe is manually placed in a space between two clamping rods and an arc plate, the pipe extrudes the clamping rods outwards, the clamping rods deflect towards the direction of a concave surface far away from the arc plate, the clamping rods pull a first pull rope in the rotating process, the first pull rope pulls a push rod to move far away from a cylinder, and the push rod drives a piston to move, so that gas in a first cavity is extruded into a buffering air bag, the gas in the buffering air bag is continuously increased, the buffering air bag gradually expands to be larger, the gap between the buffering air bag and the pipe is reduced, the buffering air bag is fully contacted with the pipe, and the pipe is clamped by a supporting plate and the clamping rods;
however, the above two clamping structures do not take into account the deformation and safety problems of the large flat workpieces, and the large sheet workpieces are necessarily transported during welding, and as in the hoisting structure in the prior art, the workpieces are often deformed and flexed under the action of hoisting gravity, and thus, in order to solve such problems, intensive research and exploration are required.
In addition to the two prior arts described above, the present invention also makes detailed search through the state intellectual property office official website search service system, and obtains the following prior arts, which are now briefly introduced to better understand the inventive concept of the present invention and to show the technical advantages and features of the present invention.
Prior art 1: CN207606456U discloses an H-shaped steel web clamping device, which comprises a supporting frame, wherein a supporting beam is horizontally arranged in the middle of the supporting frame in the front and back direction, a plurality of vacuum adsorption devices are arranged on the supporting beam at equal intervals in the front and back direction, each vacuum adsorption device comprises a rectangular steel sleeve, the rectangular steel sleeve is sleeved on the supporting beam, the left side edge and the right side edge of the rectangular steel sleeve are respectively hinged with a left pressing piece and a right pressing piece, and the left pressing piece and the right pressing piece are symmetrically arranged; but the adjusting capability of the device is poor, and the welding quality is difficult to ensure.
Prior art 2: CN106964931A discloses a fastening and adsorbing device and a workpiece processing apparatus thereof, the fastening and adsorbing device includes a fastening frame, an adsorbing component, a structural reinforcing diagonal rod, two supporting plates and a plurality of structural reinforcing horizontal rods. The adsorption component comprises a first vacuum air extractor, a second vacuum air extractor, a plurality of first adsorption parts and a plurality of second adsorption parts, wherein each first adsorption part is arranged on one bearing plate at intervals, the first adsorption parts are provided with a first avoiding groove, the bottom of the first avoiding groove is provided with a first air exhaust hole, each first air exhaust hole is communicated with the first vacuum air extractor respectively, each second adsorption part is arranged on the other bearing plate at intervals, the second adsorption parts are provided with a second avoiding groove, the bottom of the second avoiding groove is provided with a second air exhaust hole, and each second air exhaust hole is communicated with the second vacuum air extractor respectively. But the adjusting capability of the device is poor, and the welding quality is difficult to ensure.
Prior art 3: CN202894585U discloses a vacuum electron beam welding fixture for a cooling water channel of a vacuum reaction cavity of an IC (integrated circuit) device, which comprises an XY-axis two-dimensional platform, a vertical and horizontal power head, a rotating chuck and a tip assembly, wherein the XY-axis two-dimensional platform is installed on a vacuum electron beam welding machine, the vertical and horizontal power head and the rotating chuck are installed on an XY linear workbench of the XY-axis two-dimensional platform through a mounting seat, and the rotating chuck is installed on the mounting seat and is connected with the output end of the vertical and horizontal power head through a transmission device; the welded workpiece clamped on the rotating chuck has three degrees of freedom of reciprocating motion along the X axis and the Y axis along the XY axis two-dimensional platform and rotation along the rotating chuck. However, the structure of the device is complex and the cost is too high.
Disclosure of Invention
The invention mainly solves the technical problems that: the invention designs a clamping mechanism of a large sheet workpiece for welding, which can realize the clamping of the workpiece clamping device on the large workpiece, the stop mechanism can limit the connecting rod, the workpiece is arranged between two symmetrically arranged workpiece clamping devices, the thickness direction of the large sheet-shaped workpiece can be consistent with the vertical direction of gravity, thereby reducing the problem of gravity bending during hoisting, and the double-sided adsorption mode enhances the safety, the invention is provided with a plurality of rib assemblies, the rib part assembly is provided with a plurality of adsorption channels, when the invention clamps and adsorbs a workpiece, the plurality of adsorption channels can enhance the vacuum adsorption effect, thereby increased the centre gripping effect to the work piece, can effectively prevent the emergence of the relative displacement condition from appearing in clamping dynamics inequality, clamping face and workpiece surface, improved the reliability of centre gripping.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a clamping mechanism for welding large sheet-shaped workpieces comprises: work piece clamping device and centre gripping drive arrangement, its characterized in that: the workpiece clamping device comprises a workpiece adsorption device and a stop mechanism, the stop mechanism is arranged at the lower end of the workpiece adsorption device, the stop mechanism and the workpiece adsorption device are connected with each other through screws, the workpiece clamping device is of a symmetrical structure, the workpiece clamping device is respectively arranged at two sides of a workpiece and used for clamping and adsorbing the workpiece, the clamping driving device comprises a cam crank mechanism and a shell which plays a supporting role, the cam crank mechanism is arranged in the shell and used for adjusting the clamping degree of the workpiece clamping device, the cam crank mechanism comprises a cam and a crank connecting rod mechanism, a cam driving shaft is arranged at the central position of the cam, the cam driving shaft and the cam are coaxially connected with each other, one end of the cam driving shaft is driven by a driving motor to move anticlockwise, and the crank connecting rod mechanism comprises a crank arm and a driving arm, the crank arm and the driving arm are in pivot connection through a pivot shaft, a roller is arranged on the crank arm, the roller is in rotary connection with the crank arm, and the roller is in contact with the cam.
Further, the workpiece adsorption device comprises an adsorption cup, an adsorption cover and a sucker, one end of the adsorption cup is in contact with the workpiece, the other end of the adsorption cup is communicated with the adsorption cover, the sucker is integrally connected to one end of the adsorption cover, the sucker is communicated with the adsorption cover, an annular lip extending inwards and a flange extending upwards are formed at the joint between the sucker and the adsorption cover, a spherical hub is arranged at one end of the sucker and communicated with the sucker, a vacuum adsorption cavity is formed between the adsorption cup and the adsorption cover, a vacuum adsorption pipe is arranged in the vacuum adsorption cavity, and the vacuum adsorption cavity and the vacuum adsorption pipe are communicated with each other.
Further, one end of the spherical hub is provided with a vacuum inlet pipe, a connecting pipe is arranged between the vacuum inlet pipe and the spherical hub, one end of the vacuum inlet pipe is connected with the spherical hub through the connecting pipe, the other end of the vacuum inlet pipe is used for being connected with an externally arranged vacuum air pump mechanism, a guide pipe is arranged inside the spherical hub, one end of the guide pipe is communicated with the connecting pipe, and the other end of the guide pipe is communicated with the vacuum adsorption cavity.
Further, a rib component is arranged between the suction cup and the vacuum adsorption tube and comprises an inner rib component, a middle rib component and an outer rib component, the middle rib component and the outer rib component are both of circular structures formed by a plurality of ribs, a gap is reserved between the inner rib component and the vacuum adsorption tube to form an inner adsorption channel, a gap is reserved between the inner rib component and the middle rib component to form a middle adsorption channel, a gap is reserved between the middle rib component and the outer rib component to form an outer adsorption channel, and arch-shaped concentric rib structures are formed among the inner rib component, the middle rib component and the outer rib component to enhance the vacuum adsorption effect.
Further, backstop mechanism sets up the upper end of casing, backstop mechanism is including connecting rod and stop pin, and the connecting rod is hollow structure, is equipped with the stand pipe at the connecting rod overcoat, the one end of stand pipe with mutual fixed connection between the casing, the backstop round pin passes the casing inserts to the inside of connecting rod, at the one end fixedly connected with stop part of backstop round pin, has played the effect that blocks the connecting rod.
Further, be provided with the support on the spherical hub, through clamping screw interconnect between support and the spherical hub, the lower extreme of support with mutual fixed connection between the connecting piece be provided with connecting block and connecting piece on the connecting rod, mutual fixed connection between nut and the connecting rod is passed through to the one end of connecting block, and the connecting piece setting is provided with the connection piece in one side of connecting block at the lower extreme of connecting piece, and the one end of connection piece passes through bolt reciprocal anchorage with the lower extreme of connecting piece, the other end of connection piece with it is fixed through bolt reciprocal tightening between the actuating arm, actuating arm accessible connection piece drives the connecting rod and carries out the motion in the stand pipe.
Further, the inside of casing is provided with the extension spring, through fixed pin interconnect between extension spring and the casing, mutual fixed connection between the one end of crank arm and the extension spring.
Furthermore, the inside of casing is provided with the registration arm, has seted up the constant head tank in the registration arm, and the registration arm is used for mutually supporting the joint between the conveying mechanism with the outside setting, has played the effect of direction connection.
Furthermore, a plurality of reinforcing ribs extending in the radial direction are arranged between the vacuum adsorption pipe and the suction cover, and the reinforcing ribs are close to the vacuum adsorption pipe from the circumferential inner edge of the outer suction cover, so that ideal rigidity is given to the suction cover.
Furthermore, the suction cup is of a trapezoidal flaring structure and is used for carrying out adsorption clamping on the outer side wall of the large sheet workpiece.
The invention has the beneficial effects that:
the invention provides a clamping mechanism of a large-scale sheet-shaped workpiece for welding, which comprises a workpiece clamping device and a clamping driving device, wherein the clamping driving device comprises a cam crank mechanism and a shell with a supporting function, the cam crank mechanism is used for adjusting the clamping degree of the workpiece clamping device, the cam crank mechanism comprises a cam and a crank connecting rod mechanism, a cam driving shaft is arranged at the central position of the cam, the cam driving shaft and the cam are coaxially connected, the invention can drive the cam driving shaft through a motor to drive the cam and the crank connecting rod mechanism, can realize the driving of the crank connecting rod mechanism, the crank connecting rod mechanism comprises a crank arm and a driving arm, the crank arm and the driving arm are mutually pivoted through a pivoting shaft, the crank arm is provided with a roller, and the roller and the crank arm are mutually rotationally connected, the roller wheels are in contact with the cam, when the cam is driven by the cam driving shaft to move clockwise/anticlockwise, the cam can drive the roller wheels on the crank arms to move anticlockwise/anticlockwise so as to drive the crank arms and the driving arms to crank, the driving arms can drive the connecting rods to move in the guide pipes, so that the workpiece clamping devices can clamp large workpieces, the limiting effect on the connecting rods can be realized through the stop mechanisms, the workpieces are arranged between the two symmetrically arranged workpiece clamping devices, the thickness direction of the large flaky workpieces can be consistent with the vertical direction of gravity, the problem of gravity bending during hoisting is reduced, and the double-sided adsorption mode enhances the clamping safety;
the invention relates to a workpiece clamping device, which comprises a workpiece adsorption device, wherein the workpiece adsorption device comprises a suction cup, a suction cover and a suction cup, an inward extending annular lip and an upward extending flange are formed at the joint between the suction cup and the suction cover, the flange increases the thickness of the inner wall of the suction cup and can endow the suction cup with ideal rigidity, a vacuum adsorption cavity is formed between the suction cup and the suction cover, a vacuum adsorption pipe is arranged in the vacuum adsorption cavity, the vacuum adsorption cavity is communicated with the vacuum adsorption pipe, a plurality of radial extending reinforcing ribs are arranged between the vacuum adsorption pipe and the suction cover, the reinforcing ribs are close to the vacuum adsorption pipe from the circumferential inner edge of the outer suction cover to play a role of enhancing the rigidity of the suction cover, a rib component is arranged between the suction cup and the vacuum adsorption pipe, and comprises an inner rib component, a middle rib component and an outer rib component, middle rib subassembly and outer rib subassembly are the circular structure of compriseing a plurality of ribs, are formed with many absorption passageways in each rib portion subassembly, interior rib subassembly, form bow-shaped concentric rib structure between middle rib subassembly and the outer rib subassembly, when pressing from both sides tight absorption to the work piece, many absorption passageways can strengthen the vacuum adsorption effect to increased the clamping effect to the work piece, can effectively prevent the emergence of the relative displacement condition from appearing in clamping dynamics inequality, clamping face and work piece surface, improved the reliability of centre gripping.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a clamping mechanism for a large sheet-shaped workpiece for welding according to the present invention.
Fig. 2 is a schematic structural diagram of a workpiece clamping device in a clamping mechanism for large sheet-shaped workpieces for welding according to the invention.
Fig. 3 is a schematic view of the internal cross-sectional structure of a workpiece clamping device in a clamping mechanism for large sheet-shaped workpieces for welding according to the present invention.
Fig. 4 is a schematic structural diagram of a workpiece clamping device in a clamping mechanism of a large sheet-shaped workpiece for welding in a clamping state according to the invention.
FIG. 5 is a schematic structural view of the bottom of a suction cup in a clamping mechanism for a large sheet-shaped workpiece for welding according to the present invention.
FIG. 6 is a schematic cross-sectional view of the interior of a suction cup in a clamping mechanism for a large sheet-like workpiece for welding according to the present invention.
Wherein:
1. a housing; 2. A workpiece holding device; 3. A drive arm;
4. a crank arm; 5. A pivotal shaft; 6. A clamp arm;
7. a tension spring; 8. A fixing pin; 9. A roller;
10. a cam; 11. A cam drive shaft; 12. Connecting sheets;
13. a nut; 14. Connecting blocks; 15. A connecting member;
16. a connecting rod; 17. A through hole; 18. A guide tube;
19. a retaining pin; 20. A stopper; 21. Positioning a groove;
22. a workpiece; 23. A workpiece adsorption device; 24. Sucking a cup;
25. an annular lip; 26. A suction cover; 27. A suction cup;
28. a spherical hub; 29. A support; 30. A clamping screw;
31. a connecting pipe; 32. A vacuum inlet tube; 33. A positioning tube;
34. a conduit; 35. A vacuum adsorption chamber; 36. Reinforcing ribs;
37. a flange; 38. A vacuum adsorption tube; 39. An inner rib assembly;
40. a mid-rib assembly; 41. An outer rib assembly; 42. An inner adsorption channel;
43. a middle adsorption channel; 44. external adsorption channel
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fig. 1 is a schematic structural view of a clamping mechanism for a large sheet-shaped workpiece for welding according to the present invention, fig. 2 is a schematic structural view of a workpiece clamping device in the clamping mechanism for a large sheet-shaped workpiece for welding according to the present invention, fig. 3 is a schematic structural view of a cross-sectional interior of the workpiece clamping device in the clamping mechanism for a large sheet-shaped workpiece for welding according to the present invention, fig. 4 is a schematic structural view of the workpiece clamping device in the clamping mechanism for a large sheet-shaped workpiece for welding according to the present invention in a clamped state, fig. 5 is a schematic structural view of a bottom portion of a suction cup in the clamping mechanism for a large sheet-shaped workpiece for welding according to the present invention, and fig. 6 is a schematic structural view of a cross-sectional interior of the suction cup in the clamping mechanism for a.
As shown in fig. 1, the workpiece holding device 2 includes a workpiece adsorbing device and a stopping mechanism, the stopping mechanism is disposed at the lower end of the workpiece adsorbing device, the stopping mechanism and the workpiece adsorbing device are connected with each other through screws, the workpiece holding device 2 is of a symmetrical structure, the workpiece holding device 2 is disposed at two sides of a workpiece 22 respectively for holding and adsorbing the workpiece 22, the holding driving device includes a cam 10 crank mechanism and a housing 1 for supporting, the cam 10 crank mechanism is disposed inside the housing 1, the cam 10 crank mechanism is used for adjusting the clamping degree of the workpiece holding device 2, the cam 10 crank mechanism includes a cam 10 and a crank link mechanism, a cam 10 driving shaft is disposed at the center position of the cam 10, the cam 10 driving shaft and the cam 10 are coaxially connected with each other, one end of the cam 10 driving shaft is driven by a driving motor to make counterclockwise motion, the crank link mechanism comprises a crank arm 4 and a driving arm 3, the crank arm 4 and the driving arm 3 are in pivot connection through a pivot shaft 5, a roller 9 is arranged on the crank arm 4, the roller 9 and the crank arm 4 are in mutual rotation connection, the roller 9 and the cam 10 are in mutual contact, a tension spring 7 is arranged inside the shell 1, the tension spring 7 and the shell 1 are connected with each other through a fixing pin 8, and one end of the crank arm 4 and the tension spring 7 are fixedly connected with each other; the inside of casing 1 is provided with registration arm 33, has seted up constant head tank 21 in registration arm 33, and registration arm 33 is used for mutually supporting the joint between the conveying mechanism with the outside setting, has played the effect of direction connection. .
The stop mechanism is arranged at the upper end of the shell 1, the stop mechanism comprises a connecting rod 16 and a stop pin 19, the connecting rod 16 is of a hollow structure, a guide pipe 18 is sleeved outside the connecting rod 16, one end of the guide pipe 18 is fixedly connected with the shell 1, the stop pin penetrates through the shell 1 and is inserted into the connecting rod 16, and a stop part 20 is fixedly connected to one end of the stop pin, so that the effect of blocking the connecting rod 16 is achieved.
As shown in fig. 2, 3 and 4, the workpiece adsorbing device includes a suction cup 24, a suction cover 26 and a suction cup 27, one end of the suction cup 24 contacts with the workpiece 22, the other end of the suction cup 24 communicates with the suction cover 26, the suction cup 24 has a trapezoidal flaring structure for adsorbing and clamping the outer side wall of the large-sized sheet workpiece 22, the suction cup 27 is integrally connected with one end of the suction cover 26, the suction cup 27 communicates with the suction cover 26, an annular lip 25 extending inwards and a flange 37 extending upwards are formed at the connection between the suction cup 27 and the suction cover 26, a spherical hub 28 is arranged at one end of the suction cup 27, the spherical hub 28 communicates with the suction cup 27, a vacuum adsorbing cavity 35 is formed between the suction cup 24 and the suction cover 26, a vacuum adsorbing pipe 38 is arranged inside the vacuum adsorbing cavity 35, the vacuum adsorbing cavity 35 communicates with the vacuum adsorbing pipe 38, a plurality of ribs 36 extending radially are provided between the vacuum suction pipe 38 and the suction cap 26, and the ribs 36 are provided adjacent to the vacuum suction pipe 38 from the inner peripheral edge of the outer suction cap 26 to impart a desired rigidity to the suction cap 26.
A vacuum introducing pipe 32 is provided at one end of the spherical hub 28, a connecting pipe 31 is provided between the vacuum introducing pipe 32 and the spherical hub 28, one end of the vacuum introducing pipe 32 and the spherical hub 28 are connected to each other through the connecting pipe 31, the other end of the vacuum introducing pipe 32 is connected to a vacuum suction pump mechanism provided outside, a guide pipe 34 is provided inside the spherical hub 28, one end of the guide pipe 34 is communicated with the connecting pipe 31, and the other end of the guide pipe 34 is communicated with the vacuum suction chamber 35.
A bracket 29 is arranged on the spherical hub 28, the bracket 29 and the spherical hub 28 are mutually connected through a clamping screw 30, the lower end of the bracket 29 is mutually and fixedly connected with the connecting piece 15, the connecting rod 16 is provided with a connecting piece 14 and a connecting piece 15, one end of the connecting piece 14 is mutually and fixedly connected with the connecting rod 16 through a nut 13, the connecting piece 15 is arranged on one side of the connecting piece 14, the lower end of the connecting piece 15 is provided with a connecting piece 12, one end of the connecting piece 12 is mutually fixed with the lower end of the connecting piece 15 through a bolt, the other end of the connecting piece 12 is mutually screwed and fixed with the driving arm 3 through a bolt, and the driving arm 3 can drive the connecting piece 16 to move in the guide pipe 18;
as shown in fig. 5 and 6, a rib assembly is disposed between the suction cup 24 and the vacuum suction pipe 38, the rib assembly includes an inner rib assembly 39, a middle rib assembly 40 and an outer rib assembly 41, the middle rib assembly 40 and the outer rib assembly 41 are both circular structures composed of a plurality of ribs, a gap is left between the inner rib assembly 39 and the vacuum suction pipe 38 to form an inner suction channel 42, a gap is left between the inner rib assembly 39 and the middle rib assembly 40 to form a middle suction channel 43, a gap is left between the middle rib assembly 40 and the outer rib assembly 41 to form an outer suction channel 44, and an arch-shaped concentric rib structure is formed between the inner rib assembly 39, the middle rib assembly 40 and the outer rib assembly 41 to enhance the vacuum suction effect.
The working mode is as follows:
the invention provides a clamping mechanism for a large sheet-shaped workpiece for welding, when the workpiece 22 is clamped, firstly, the large sheet-shaped workpiece 22 is vertically arranged between two workpiece clamping devices 2 which are symmetrically arranged, a worker respectively starts a driving motor (not marked in the figure) arranged in a shell 1, one end of a driving shaft of a cam 10 in the clamping mechanism can be driven by the driving motor (not marked in the figure) to do anticlockwise motion, one end of a driving shaft of the cam 10 in the other shell 1 can be driven by the driving motor (not marked in the figure) to do clockwise motion, so that the driving of a crank link mechanism can be realized, the crank link mechanism comprises a crank arm 4 and a driving arm 3, the crank arm 4 is mutually pivoted and connected with the driving arm 3 through a pivoting shaft 5, the crank arm 4 is provided with a roller 9, the roller 9 and the crank arm 4 are rotationally connected with each other, the roller 9 and the cam 10 are contacted with each other, when the cam 10 is driven by a driving shaft of the cam 10 to move clockwise, the cam 10 can drive the roller 9 on the crank arm 4 to move anticlockwise so as to drive the crank arm 4 and the driving arm 3 to crank, the driving arm 3 can drive the connecting rods 16 to move inwards, the two crank-link mechanisms in the invention respectively drive the two connecting rods 16 to move relatively, so that the clamping of the workpiece 22 clamping device 2 on the large workpiece 22 can be realized, the invention can realize the limiting function of the connecting rods 16 through the stopping mechanism, when the workpiece clamping device 2 clamps the workpiece 22, a vacuum suction pump mechanism (not shown in the figure) connected with a vacuum inlet pipe 32 is started, a vacuum pump mechanism is started, and the vacuum suction pump mechanism performs suction through a guide pipe 34 in the spherical hub 28, one end of the conduit 34 is communicated with the connecting pipe 31, the other end of the conduit 34 is communicated with the vacuum adsorption cavity 35 formed between the suction cup 24 and the suction cover 26, the workpiece adsorption device of the invention comprises the suction cup 24, the suction cover 26 and the suction cup 27, one end of the suction cup 24 is contacted with the workpiece 22 in a clamping state, a rib component arranged between the suction cup 24 and the vacuum adsorption pipe 38 comprises an inner rib component 39, a middle rib component 40 and an outer rib component 41, the middle rib component 40 and the outer rib component 41 are both in a circular structure consisting of a plurality of ribs, a plurality of adsorption channels are formed in each rib component, an arch concentric rib structure is formed between the inner rib component 39, the middle rib component 40 and the outer rib component 41, when the workpiece 22 is clamped and adsorbed, the plurality of adsorption channels can adsorb the outer wall of the workpiece 22, the adsorption and clamping effects are strong, when the workpiece 22 is transported to a designated place, an operator closes the vacuum air pump mechanism and starts the driving motor, one end of the driving shaft of the cam 10 in the invention is driven by the driving motor to move clockwise, one end of the driving shaft of the cam 10 in the other shell 1 is driven by the driving motor to move anticlockwise, so that the driving of the crank-link mechanism is realized, the crank-link mechanism respectively drives the two connecting rods 16 to move outwards, so that the two workpiece clamping devices 2 which are symmetrically arranged with each other are separated from two sides of the workpiece 22, after the use is finished, the driving motor is powered off, the cam 10 stops rotating, and the workpiece 22 can be released.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A clamping mechanism for welding large sheet-shaped workpieces comprises: work piece clamping device and centre gripping drive arrangement, its characterized in that: the workpiece clamping device comprises a workpiece adsorption device and a stop mechanism, the stop mechanism is arranged at the lower end of the workpiece adsorption device, the stop mechanism and the workpiece adsorption device are connected with each other through screws, the workpiece clamping device is of a symmetrical structure, the workpiece clamping device is respectively arranged at two sides of a workpiece and used for clamping and adsorbing the workpiece, the clamping driving device comprises a cam crank mechanism and a shell which plays a supporting role, the cam crank mechanism is arranged in the shell and used for adjusting the clamping degree of the workpiece clamping device, the cam crank mechanism comprises a cam and a crank connecting rod mechanism, a cam driving shaft is arranged at the central position of the cam, the cam driving shaft and the cam are coaxially connected with each other, one end of the cam driving shaft is driven by a driving motor to move anticlockwise, and the crank connecting rod mechanism comprises a crank arm and a driving arm, the crank arm and the driving arm are in pivot connection through a pivot shaft, a roller is arranged on the crank arm, the roller is in rotary connection with the crank arm, and the roller is in contact with the cam.
2. The clamping mechanism for the large-sized sheet-shaped workpiece for welding according to claim 1, characterized in that: the workpiece adsorption device comprises an adsorption cup, an adsorption cover and a sucker, one end of the adsorption cup is in contact with a workpiece, the other end of the adsorption cup is communicated with the adsorption cover, the sucker is integrally connected to one end of the adsorption cover, the sucker is communicated with the adsorption cover, an annular lip extending inwards and a flange extending upwards are formed at the joint between the sucker and the adsorption cover, a spherical hub is arranged at one end of the sucker and communicated with the sucker, a vacuum adsorption cavity is formed between the adsorption cup and the adsorption cover, a vacuum adsorption pipe is arranged in the vacuum adsorption cavity, and the vacuum adsorption cavity and the vacuum adsorption pipe are communicated with each other.
3. The clamping mechanism for the large-sized sheet-shaped workpiece for welding according to claim 2, characterized in that: the vacuum adsorption device is characterized in that a vacuum inlet pipe is arranged at one end of the spherical hub, a connecting pipe is arranged between the vacuum inlet pipe and the spherical hub, one end of the vacuum inlet pipe is connected with the spherical hub through the connecting pipe, the other end of the vacuum inlet pipe is used for being connected with an externally arranged vacuum air pump mechanism, a catheter is arranged inside the spherical hub, one end of the catheter is communicated with the connecting pipe, and the other end of the catheter is communicated with the vacuum adsorption cavity.
4. The clamping mechanism for the large-sized sheet-shaped workpiece for welding according to claim 2, characterized in that: be provided with the rib subassembly between suction cup and the vacuum adsorption pipe, the rib subassembly is including interior rib subassembly, middle rib subassembly and outer rib subassembly, and middle rib subassembly and outer rib subassembly are the circular structure of constituteing by a plurality of ribs, interior rib subassembly with leave the clearance between the vacuum adsorption pipe, form the interior absorption passageway, leave the clearance between interior rib subassembly and the middle rib subassembly, form middle absorption passageway, leave the clearance between middle rib subassembly and the outer rib subassembly, form the outer absorption passageway, form bow-shaped concentric rib structure between interior rib subassembly, middle rib subassembly and the outer rib subassembly, played the effect of reinforcing vacuum adsorption.
5. The clamping mechanism for the large-sized sheet-shaped workpiece for welding according to claim 1, characterized in that: backstop mechanism sets up the upper end of casing, backstop mechanism is hollow structure including connecting rod and stop pin, and the connecting rod is equipped with the stand pipe at the connecting rod overcoat, the one end of stand pipe with mutual fixed connection between the casing, the backstop round pin passes the casing inserts to the inside of connecting rod, has played the effect that blocks the connecting rod at the one end fixedly connected with stop part of backstop round pin.
6. The clamping mechanism for the large sheet-like workpiece for welding according to any one of claims 1 to 5, characterized in that: the spherical hub is provided with a support, the support and the spherical hub are mutually connected through a clamping screw, the lower end of the support is fixedly connected with the connecting piece, the connecting rod is provided with a connecting block and a connecting piece, one end of the connecting block is fixedly connected with the connecting rod through a nut, the connecting piece is arranged on one side of the connecting block, a connecting piece is arranged at the lower end of the connecting piece, one end of the connecting piece is fixed with the lower end of the connecting piece through a bolt, the other end of the connecting piece is screwed and fixed with the driving arm through a bolt, and the driving arm can drive the connecting rod to move in the guide pipe through the connecting piece.
7. The clamping mechanism for the large-sized sheet-shaped workpiece for welding according to claim 1, characterized in that: the inside of casing is provided with the extension spring, through fixed pin interconnect between extension spring and the casing, mutual fixed connection between the one end of crank arm and the extension spring.
8. The clamping mechanism for the large-sized sheet-shaped workpiece for welding according to claim 1, characterized in that: the inside of casing is provided with the registration arm, has seted up the constant head tank in the registration arm, the registration arm be used for with the outside conveying mechanism between the joint of mutually supporting, played the effect of direction connection.
9. The clamping mechanism for the large-sized sheet-shaped workpiece for welding according to claim 2, characterized in that: a plurality of reinforcing ribs extending in the radial direction are arranged between the vacuum adsorption pipe and the suction cover, and the reinforcing ribs are close to the vacuum adsorption pipe from the circumferential inner edge of the outer suction cover, so that ideal rigidity is given to the suction cover.
10. The clamping mechanism for the large-sized sheet-shaped workpiece for welding according to claim 2, characterized in that: the suction cup is of a trapezoidal flaring structure and is used for carrying out adsorption clamping on the outer side wall of a large sheet workpiece.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010116371.1A CN111151958B (en) | 2020-02-25 | 2020-02-25 | Clamping mechanism for large sheet-shaped workpiece for welding |
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| CN202010116371.1A CN111151958B (en) | 2020-02-25 | 2020-02-25 | Clamping mechanism for large sheet-shaped workpiece for welding |
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| CN111151958B CN111151958B (en) | 2021-08-17 |
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|---|---|
| CN111151958B (en) | 2021-08-17 |
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