Clamping jaw assembly for welding positioner and welding positioner for heavy workpieces

Abstract

The utility model provides a clamping jaw assembly for a welding positioner and a welding positioner for heavy workpieces, relates to the field of welding positioners, and adopts the technical scheme that the clamping jaw assembly comprises a mounting plate, two end clamping jaws are oppositely arranged on the mounting plate, the two end clamping jaws can move in opposite directions along the length direction of the mounting plate, and the end clamping jaws are arranged on the mounting plate. The end clamping jaw is of an L-shaped structure and comprises a side plate and a bottom plate, the side plate is vertically arranged on one side of the bottom plate, a vertical plate is further arranged on the mounting plate, a moving plate is arranged on the vertical plate in an up-down moving mode, a pressing jaw is arranged on the moving plate, and the pressing jaw is used for pressing the upper side of the end of a workpiece. And the bottom plate and the pressing claw are oppositely arranged. According to the utility model, the clamping reliability of the heavy workpiece can be enhanced, and slippage caused by overturning is avoided.

Description

Technical Field

[0001] The utility model relates to the field of welding positioners, in particular to a clamping jaw assembly for a welding positioner and a welding positioner for heavy workpieces. Background Art

[0002] Welding is an important machining method in modern industrial production, and is particularly essential when manufacturing large structural parts or complex mechanical components. During the welding process, the workpiece needs to be in the optimal welding position to achieve the desired welding effect. Currently, welding is mainly performed by crane hoisting to flip the workpiece and welding is performed manually. This method is labor-intensive and inefficient, and the workpiece cannot reach the optimal welding position. It also poses safety risks. The flipping and rotation of the workpiece requires the use of a crane, which wastes equipment resources and is not conducive to mass production of products.

[0003] In the prior art, a Chinese utility model patent with authorization announcement number CN 219131337U discloses an automatic welding system for a mainframe. The system clamps a workpiece using a sliding taper pin assembly and a centering clamping assembly. The sliding taper pin assembly includes a first carriage seat and a first taper pin, which are fixedly connected to the rotation output end of a first rotary positioner via fasteners. Vertical rails are provided on both sides of the first carriage seat, and a second taper pin is slidably connected to the rails. The second taper pin and the first taper pin are coaxially arranged relative to each other. The centering clamping assembly includes two sliding plates that can move in opposite directions, capable of clamping corresponding tooling, which is connected to the workpiece. This technical solution can cooperate with welding robots for automatic position adjustment, improving the level of automation in welding.

[0004] However, when the above technical solution is used, when the workpiece is heavy, such as a coal mining machinery workpiece, where a single piece weighs up to 20 tons, and when there is no hole groove corresponding to the taper pin at its end, the workpiece is clamped using the above technical solution. Only the end face of the taper pin contacts the workpiece. On the one hand, the contact surface is small, and on the other hand, there are fewer limiting directions for the workpiece. When the clamped workpiece is turned over, the workpiece clamped at this end is prone to slipping under the action of its own gravity, affecting the welding accuracy. In severe cases, the workpiece is completely separated from the taper pin and hits the ground or the equipment below, causing an accident. Utility Model Content

[0005] In order to solve the technical problem of unreliable clamping of heavy workpieces by welding positioners in the above-mentioned prior art, the utility model provides a clamping jaw assembly for a welding positioner and a welding positioner for heavy workpieces, which can enhance the clamping reliability of heavy workpieces and avoid slipping caused by flipping.

[0006] In the first aspect, in order to solve the above-mentioned technical problems, the utility model provides a clamping jaw assembly for a welding positioner, including a mounting plate, on which two end clamping jaws are relatively arranged, and the two end clamping jaws can move in opposite directions along the length direction of the mounting plate, and the end clamping jaws are L-shaped. The end clamping jaws include side plates and a bottom plate, and the side plates are vertically arranged on one side of the bottom plate. A vertical plate is also provided on the mounting plate, and a movable plate is movably provided on the vertical plate. A pressure claw is provided on the movable plate, and the pressure claw is used to press on the upper side of the end of the workpiece, and the bottom plate is arranged opposite to the pressure claw.

[0007] The utility model is capable of clamping multiple surfaces of a workpiece by arranging two L-shaped end clamps and a pressure jaw. During the turning process of the workpiece, there is always a corresponding limit along the direction of gravity to effectively prevent the workpiece from slipping, thereby improving the clamping reliability.

[0008] Furthermore, the two end clamps are respectively arranged on the corresponding screw 1, the two screws are coaxially arranged and the ends are connected, the thread rotation directions of the two screws 1 are opposite, and one of the screws 1 is connected to a drive motor 1.

[0009] The utility model adopts a motor to drive two screws with opposite rotation directions, which can drive the two end clamps to move synchronously toward the center or away from the center at the same time, which is beneficial to ensure that the two end clamps are symmetrically arranged and avoid increasing the clamping accuracy.

[0010] Furthermore, two pressing claws are provided, and both pressing claws are movably provided on the movable plate.

[0011] The utility model is provided with two movable pressing jaws, so that the distance between the two pressing jaws can be adjusted according to the size of different workpieces, thereby ensuring stable downward pressure and avoiding inconvenient pressing positions on the workpiece, thereby expanding applicability and flexibility of use.

[0012] Furthermore, the two pressure claws are respectively arranged on the corresponding screw 2, the two screws 2 are coaxially arranged and the ends are connected, the thread rotation directions of the two screws 2 are opposite, and one of the screws 2 is connected to the drive motor 2.

[0013] The utility model adopts a motor to drive two lead screws with opposite rotation directions to drive the two pressure claws to move, which is beneficial to ensuring the symmetrical arrangement of the two end clamping claws and improving the clamping accuracy and stability.

[0014] Furthermore, the movable plate is connected to a lead screw three, the lead screw three is rotatably arranged on the vertical plate, and the lead screw three is connected to a drive motor three.

[0015] The utility model can accurately control the height position of the pressure claw through the combination of the motor and the lead screw, and the lead screw has a self-locking effect to prevent the pressure claw from moving under force.

[0016] In the second aspect, the utility model also provides a welding positioner for heavy workpieces, including the above-mentioned welding positioner clamping assembly, and also including a column one and a column two arranged relatively to each other, and the column one and the column two are movably arranged on the ground through a ground rail assembly, and a rotating plate one is provided on the column one, and a rotating plate two is provided on the column two, and the rotating plate one and the rotating plate two can both rotate around their own axes in a vertical plane, and the rotating plate one and the rotating plate two can also be raised and lowered, and the welding positioner clamping assembly is provided on the rotating plate one, and the welding positioner clamping assembly or the welding positioner clamping assembly is provided on the rotating plate two, and the welding positioner clamping assembly includes a pin cone, and the pin cone can be extended into the hole on the workpiece.

[0017] Furthermore, the second rotating plate is provided with a clamping assembly for a welding positioner, and the clamping assembly for a welding positioner includes a clamping plate, and the clamping plate is arranged parallel to the mounting plate. Clamping mechanisms are movably provided at both ends of the clamping plate, and the two clamping mechanisms can move in opposite directions along the length direction of the clamping plate, and the clamping mechanism includes the pin cone.

[0018] The utility model adopts a clamping method of multi-faceted clamping at one end and pin cone insertion at the other end, and can be applied to workpieces that are not convenient to clamp at one end, thereby effectively preventing the workpiece from turning over and slipping.

[0019] Furthermore, the clamping mechanism includes a support plate, which is movably arranged on the clamping plate, and a clamping seat is movably arranged on the support plate. The clamping seat can be raised and lowered, and a cone pin is detachably arranged at the end of the clamping seat.

[0020] Furthermore, the two support plates are respectively arranged on the screw four, the two screws four are coaxially arranged and the ends are connected, the thread rotation directions of the two screws four are opposite, and one of the screws four is connected to the drive motor four.

[0021] The utility model drives the clamping mechanism to move by using one motor to drive two lead screws with opposite rotation directions, thereby ensuring the symmetry of the two clamping mechanisms and improving the clamping accuracy.

[0022] Furthermore, both the column one and the column two are provided with slides that can be raised and lowered, and the slides are provided with rotatable ring gears that are engaged with the driving gears that are provided on the flipping motor, and the ring gears are connected to the rotating plate one or the rotating plate two, and the rotating plate one and the clamping plate one, as well as the rotating plate two and the clamping plate two are all integrated structures.

[0023] It can be seen from the above technical solutions that the present invention has the following advantages:

[0024] The utility model provides a clamping jaw assembly for a welding positioner and a welding positioner for heavy workpieces. By arranging two L-shaped end clamping jaws and a pressure jaw, it is possible to clamp multiple surfaces of the workpiece. During the turning process of the workpiece, there is always a corresponding limit in the direction of gravity, which effectively prevents the workpiece from slipping and improves the clamping reliability. By adopting a motor to drive two lead screws with opposite rotation directions, the two end clamping jaws can be driven to move synchronously toward or away from the center at the same time, which is conducive to ensuring the symmetrical arrangement of the two end clamping jaws and avoiding improving the clamping accuracy. By arranging two movable pressure jaws, the distance between the two pressure jaws can be adjusted according to the size of different workpieces, ensuring stable downward pressure and avoiding inconvenient pressing on the workpiece. position, expanding applicability and flexibility of use; by using one motor to drive two lead screws with opposite rotation directions to drive the two pressure jaws to move, it is beneficial to ensure the symmetrical arrangement of the two end clamps, thereby improving clamping accuracy and stability; through the combination of motor + lead screw, the height position of the pressure jaws can be accurately controlled, and the lead screw has a self-locking effect to prevent the pressure jaws from moving under force; the clamping method of adopting multi-faceted clamping at one end and pin cone insertion at the other end can be applied to workpieces that are not convenient to clamp by clamping at one end, effectively preventing them from flipping and slipping; by using one motor to drive two lead screws with opposite rotation directions to drive the clamping mechanism to move, it can ensure the symmetrical state of the two clamping mechanisms and improve clamping accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention Figure 1 .

[0027] Figure 2 This is a schematic diagram of the structure of the first embodiment of the present invention Figure 2 .

[0028] Figure 3This is a schematic diagram of the structure of the first embodiment of the present invention Figure 3 .

[0029] Figure 4 This is a structural diagram of a second specific implementation method of the present utility model.

[0030] Figure 5 This is a structural diagram of a clamping assembly for a welding positioner in a second specific embodiment of the present invention.

[0031] Figure 6 This is a schematic diagram of the assembly structure of the clamping seat and the pin cone in the second specific implementation method of the present utility model.

[0032] Figure 7 This is a structural diagram of the column 1 in the second specific implementation method of the present utility model.

[0033] In the figure, 1. ground rail assembly; 2. clamping jaw assembly for welding positioner; 201. moving plate; 202. driving motor three; 203. driving motor two; 204. driving motor one; 205. end clamping jaw; 2051. side jaw; 2052. bottom jaw; 206. pressure jaw; 207. vertical plate; 208. lead screw one; 209. lead screw two; 210. lead screw three; 3. clamping assembly for welding positioner; 301. driving motor four; 302. driving motor six; 303. clamping plate; 304. rotating plate two; 305. supporting plate; 306. pin cone; 307. clamping seat; 4. column two; 401. lead screw five; 402. slide; 403. gear ring; 5. column one; 6. workpiece. DETAILED DESCRIPTION

[0034] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent. Specific implementation method 1

[0036] like Figures 1 to 3As shown, this specific embodiment provides a clamping jaw assembly 2 for a welding positioner, including a mounting plate, on which two end clamping jaws 205 are relatively arranged, and the two end clamping jaws 205 can move in opposite directions along the length direction of the mounting plate. The end clamping jaws 205 are L-shaped structures, and the end clamping jaws 205 include side plates 2051 and a bottom plate 2052. The side plates 2051 are vertically arranged on one side of the bottom plate 2052. A vertical plate 207 is also provided on the mounting plate, and a movable plate 201 is movably provided on the vertical plate 207. A pressure claw 206 is provided on the movable plate 201, and the pressure claw 206 is used to press on the upper side of the end of the workpiece 6. The bottom plate 2052 is arranged opposite to the pressure claw 206.

[0037] This specific embodiment is capable of clamping multiple surfaces of the workpiece 6, including the side, bottom and top surfaces, by providing two L-shaped end clamps 205 and a pressure jaw 206. During the flipping process of the workpiece 6, there is always a corresponding limit along the direction of gravity to effectively prevent the workpiece 6 from slipping, thereby improving the clamping reliability and being suitable for welding and flipping of heavy workpieces 6.

[0038] like Figure 1 and Figure 3 As shown, in order to ensure the stability of the force applied by the pressure claw 206, in this specific embodiment, two pressure claws 206 are provided. Preferably, both pressure claws 206 are movably provided on the movable plate 201. By providing two movable pressure claws 206, the distance between the two pressure claws 206 can be adjusted according to the size of different workpieces 6, ensuring stable downward pressure to avoid inconvenient pressing positions on the workpiece 6, thereby expanding applicability and flexibility of use.

[0039] like Figure 2 and Figure 3 As shown, in order to ensure the clamping accuracy, the two end clamps 205 are respectively arranged on the corresponding screw 1 208, the two screws 1 208 are coaxially arranged and the ends are connected, the threads of the two screws 1 208 are in opposite directions, one of the screws 1 208 is connected to the drive motor 1 204, and the drive motor 1 204 is arranged at one end of the mounting plate; the two pressure jaws 206 are respectively arranged on the corresponding screw 2 209, the two screws 209 are coaxially arranged and the ends are connected, the threads of the two screws 209 are in opposite directions, and one of the screws 209 is connected to the drive motor 2 203; by using a motor to drive two screws with opposite rotation directions, the end clamps 205 and pressure jaws 206 at both ends can be driven to move toward each other synchronously, ensuring that the two end clamps 205 and the two pressure jaws 206 are in symmetrical states, and the workpiece 6 is always located in the center of the two end clamps 205, which is conducive to improving the clamping accuracy and thus ensuring the welding accuracy.

[0040] like Figure 1As shown, in order to achieve accurate movement of the pressure claw 206, in this specific embodiment, the movable plate 201 is connected to the screw three 210, the screw three 210 is rotatably set on the vertical plate 207, and the screw three 210 is connected to the drive motor three 202, which is set on the vertical plate 207. Specific implementation method 2

[0042] like Figure 4 and Figure 5 As shown, this specific embodiment provides a welding positioner for heavy workpieces, including a clamping jaw assembly 2 for a welding positioner of the specific embodiment 1, and also includes a column 1 5 and a column 2 4 arranged relatively to each other. The column 1 5 and the column 2 4 are movably arranged on the ground through a ground rail assembly 1, so as to facilitate adjustment of the clamping position according to the length of the workpiece 6. A rotating plate 1 is provided on the column 1 5, and a rotating plate 2 304 is provided on the column 2 4. Both the rotating plate 1 and the rotating plate 2 304 can rotate around their own axes in a vertical plane, and both the rotating plate 1 and the rotating plate 2 304 can also be lifted and lowered. The rotating plate 1 is provided with a welding The clamping assembly 2 for the welding positioner is connected, and the rotating plate 2 304 is provided with a clamping assembly 2 for the welding positioner or a clamping assembly 3 for the welding positioner. The clamping assembly 3 for the welding positioner includes a pin cone 306, which can be inserted into the hole on the workpiece 6; in the prior art, the structures at both ends of the workpiece 6 are often different. In order to be suitable for a workpiece 6 that is not convenient to be clamped by clamping at one end, in this specific embodiment, the rotating plate 2 304 is provided with a clamping assembly 3 for the welding positioner, and the pin cone 306 is inserted into the hole at the end of the workpiece 6 to limit the position during the flipping process, thereby effectively preventing the workpiece 6 from slipping.

[0043] like Figure 5 As shown, in this specific embodiment, the clamping mechanism includes a support plate 305, which is movably arranged on the clamping plate 303, and a clamping seat 307 is movably arranged on the support plate 305, and a tapered pin is detachably arranged at the end of the clamping seat 307; in order to ensure the symmetrical state of the two tapered pins during the clamping process and improve the clamping accuracy, in this specific embodiment, the two support plates 305 are respectively arranged on the screw four, the two screw fours are coaxially arranged and the ends are connected, the thread rotation directions of the two screw fours are opposite, and one of the screw fours is connected to the drive motor four 301; in order to match the tapered pin with holes of different heights on various workpieces 6, the clamping seat 307 can be raised and lowered, and in this specific embodiment, the clamping seat 307 is connected to the screw six, the screw six is ​​connected to the drive motor six 302, and the drive motor six 302 is arranged on the support plate 305.

[0044] like Figure 7As shown, in this specific embodiment, in order to ensure that the clamping assembly 2 for the welding positioner and the clamping assembly 3 for the welding positioner can move accurately, a slide 402 is provided on the column 1 5 and the column 2 4 so that they can be raised and lowered by the drive motor 5 and the screw 5 401. A ring gear 403 is rotatably provided on the slide 402 through a bearing. The ring gear 403 is engaged with the driving gear. The driving gear is provided on the flip motor, and the flip motor is provided on the rear side of the slide 402. The ring gear 403 is connected to the rotating plate 1 or the rotating plate 2 304 by bolts. The rotating plate 1 and the clamping plate 303 1, the rotating plate 2 304 and the clamping plate 303 2 are all integrated structures.

[0045] like Figure 6 As shown, in this specific embodiment, in order to further improve the flexibility of use, pin cones 306 can be installed on both sides of the end of the clamping seat 307 by bolts to clamp the end of the workpiece 6 in an internal support or external clamping manner.

[0046] From the above specific embodiments, it can be seen that the present invention has the following beneficial effects:

[0047] 1. By providing two L-shaped end clamps 205 and a pressure jaw 206, multiple surfaces of the workpiece 6 can be clamped. During the turning process of the workpiece 6, corresponding limits are always present along the direction of gravity to effectively prevent the workpiece 6 from slipping, thereby improving the clamping reliability.

[0048] 2. By using one motor to drive two screws 208 with opposite rotation directions, the two end clamps 205 can be driven to move synchronously toward or away from the center at the same time, which is conducive to ensuring the symmetrical arrangement of the two end clamps 205 and avoiding the increase of clamping accuracy;

[0049] 3. By providing two movable pressing jaws 206, the distance between the two pressing jaws 206 can be adjusted according to the size of different workpieces 6, ensuring stable downward pressure and avoiding inconvenient pressing positions on the workpiece 6, thereby expanding applicability and flexibility of use;

[0050] 4. By using one motor to drive two screws with opposite rotation directions to drive the two pressure claws 206 to move, it is beneficial to ensure the symmetrical arrangement of the two end clamping claws 205, thereby improving the clamping accuracy and stability;

[0051] 5. The combination of motor and lead screw can accurately control the height position of the pressure claw 206, and the lead screw has a self-locking function to prevent the pressure claw 206 from moving under force;

[0052] 6. The clamping method of using multi-faceted clamping at one end and inserting the pin cone 306 at the other end can be applied to workpieces 6 that are not convenient to clamp at one end, effectively preventing them from turning over and slipping;

[0053] 7. By using a motor to drive two lead screws with opposite rotation directions to drive the clamping mechanism to move, the symmetry of the two clamping mechanisms can be ensured, thereby improving the clamping accuracy.

[0054] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A clamping jaw assembly (2) for a welding positioner, comprising a mounting plate, characterized in that: Two end clamps (205) are arranged opposite to each other on the mounting plate. The two end clamps (205) can move in opposite directions along the length direction of the mounting plate. The end clamps (205) are L-shaped. The end clamps (205) include side plates (2051) and bottom plates (2052). The side plates (2051) are vertically arranged on one side of the bottom plate (2052). The mounting plate is also provided with a vertical plate (207). A movable plate (201) is arranged on the vertical plate (207) so as to be movable up and down. A pressure claw (206) is arranged on the movable plate (201). The pressure claw (206) is used to press the upper side of the end of the workpiece (6). The bottom plate (2052) is arranged opposite to the pressure claw (206).

2. The clamping jaw assembly (2) for a welding positioner according to claim 1, characterized in that: The two end clamps (205) are respectively arranged on the corresponding screws (208), the two screws (208) are coaxially arranged and the ends are connected, the thread rotation directions of the two screws (208) are opposite, and one of the screws (208) is connected to a drive motor (204).

3. The clamping jaw assembly (2) for a welding positioner according to claim 2, characterized in that: Two pressing claws (206) are provided, and both pressing claws (206) are movably provided on the movable plate (201).

4. The clamping jaw assembly (2) for a welding positioner according to claim 3, characterized in that: The two pressing claws (206) are respectively arranged on the corresponding screws 2 (209), the two screws 2 (209) are coaxially arranged and the ends are connected, the thread rotation directions of the two screws 2 (209) are opposite, and one of the screws 2 (209) is connected to the driving motor 2 (203).

5. The welding positioner clamping jaw assembly (2) according to any one of claims 1 to 4, characterized in that: The movable plate (201) is connected to a lead screw three (210), the lead screw three (210) is rotatably arranged on the vertical plate (207), and the lead screw three (210) is connected to a drive motor three (202).

6. A welding positioner for heavy workpieces, characterized in that: It comprises a welding positioner clamping assembly (2) as described in claim 5, and also comprises a column one (5) and a column two (4) arranged opposite to each other, the column one (5) and the column two (4) being movably arranged on the ground through a ground rail assembly (1), the column one (5) being provided with a rotating plate one, the column two (4) being provided with a rotating plate two (304), the rotating plate one and the rotating plate two (304) both being capable of rotating around their own axes in a vertical plane, the rotating plate one and the rotating plate two (304) both being capable of rising and falling, the rotating plate one being provided with the welding positioner clamping assembly (2), the rotating plate two (304) being provided with the welding positioner clamping assembly (2) or the welding positioner clamping assembly (3), the welding positioner clamping assembly (3) comprising a pin cone (306), the pin cone (306) being capable of extending into a hole on a workpiece (6).

7. The welding positioner for heavy workpieces according to claim 6, wherein: The second rotating plate (304) is provided with a clamping assembly (3) for a welding positioner, and the clamping assembly (3) for a welding positioner includes a clamping plate (303), and the clamping plate (303) is arranged parallel to the mounting plate. Clamping mechanisms are movably provided at both ends of the clamping plate (303), and the two clamping mechanisms can move in opposite directions along the length direction of the clamping plate (303), and the clamping mechanism includes the pin cone (306).

8. The welding positioner for heavy workpieces according to claim 7, characterized in that: The clamping mechanism includes a support plate (305), the support plate (305) is movably arranged on the clamping plate (303), a clamping seat (307) is movably arranged on the support plate (305), the clamping seat (307) can be raised and lowered, and a cone pin is detachably arranged at the end of the clamping seat (307).

9. The welding positioner for heavy workpieces according to claim 8, characterized in that: The two support plates (305) are respectively arranged on the lead screws 4, the two lead screws 4 are coaxially arranged and the ends are connected, the thread rotation directions of the two lead screws 4 are opposite, and one of the lead screws 4 is connected to a drive motor 4 (301).

10. The welding positioner for heavy workpieces according to claim 7, wherein: A slide plate (402) is provided on both the column 1 (5) and the column 2 (4) so ​​as to be liftable, a gear ring (403) is provided on the slide plate (402) so as to be rotatable, the gear ring (403) is engaged with a driving gear, the driving gear is provided on a flip motor, the gear ring (403) is connected to the rotating plate 1 or the rotating plate 2 (304), the rotating plate 1 and the clamping plate (303) 1, the rotating plate 2 (304) and the clamping plate (303) 2 are all integrated structures.

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