Automatic positioning device and method for welding of a gas tank of a gas insulated switchgear

Abstract

The application discloses a welding automatic positioning device and method for a gas tank of a gas insulated switchgear, wherein an internal positioning device comprises a fixing frame, a positioning support and a first clamping mechanism; the positioning support is connected with the fixing frame; the fixing frame is connected with a base through a displacement overturning control mechanism; the first clamping mechanism is connected with the fixing frame and is used for clamping left and right side plates on the positioning support; an opening and closing device comprises two oppositely arranged opening and closing supports; the two opening and closing supports are connected with the fixing frame and can rotate relative to the fixing frame; a third clamping mechanism is arranged on the opening and closing support and is used for clamping a top plate and the positioning support; an external positioning device comprises an outer template and a second clamping mechanism; the outer template can move forward and backward relative to the positioning support; the front and rear side plates are clamped through the outer template and the positioning support; when the clamping end of the second clamping mechanism is stretched out, the left and right side plates and the top plate can be clamped in the forward and backward directions.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to an automatic positioning device and method for welding gas boxes of gas-insulated switchgear. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] The gas-insulated switchgear's gas box plate is made of 3mm stainless steel sheet, laser-welded. When welding the gas box using laser welding equipment, precise clamping and positioning of the plate material are required, with a plate gap requirement of ≤0.1mm. However, thin plates are prone to deformation during clamping and positioning, affecting positioning accuracy and consequently welding accuracy. Furthermore, the gas box weld seams are located in different planes, necessitating automatic switching between welding stations for automated welding. Manual positioning and station switching result in low efficiency and low repeatability, failing to meet the requirements for mass production and precise plate gaps. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an automatic positioning device and method for welding gas boxes of gas-insulated switchgear. This device enables precise positioning and clamping of the gas box plates during laser welding and allows for automatic switching between different welding stations, thereby improving the welding accuracy and efficiency of the gas box.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In the first aspect, an automatic positioning device for welding gas boxes of gas-insulated switchgear is proposed, comprising a base, an internal positioning device, an opening and closing device, and an external positioning device. The internal positioning device includes a fixed frame, a positioning bracket, and a first clamping mechanism. The positioning bracket is connected to the fixed frame, and the fixed frame is connected to the base via a displacement and flipping control mechanism. The first clamping mechanism is connected to the fixed frame and is used to clamp the left and right side plates of the gas box onto the positioning bracket. The opening and closing device includes two opposing opening and closing brackets, both of which are connected to the fixed frame and can rotate relative to the fixed frame. A third clamping mechanism is provided on the opening and closing brackets, which is used to clamp the top plate of the gas box to the positioning bracket. The external positioning device includes an outer template and a second clamping mechanism. The outer template can move back and forth relative to the positioning bracket, clamping the front and rear side plates of the gas box through the outer template and the positioning bracket. The clamping end of the second clamping mechanism can extend and retract. When the clamping end of the second clamping mechanism extends, it can clamp the left and right side plates and the top plate in the front-back direction.

[0007] Secondly, a welding method for an automatic positioning device for welding gas boxes of gas-insulated switchgear, as proposed in the first aspect, is provided, including:

[0008] Open the opening and closing device, place the left and right side plates of the air box between the first clamping mechanism and the positioning bracket, place the top plate of the air box on the top of the positioning bracket, and close the opening and closing device.

[0009] The left and right side plates are clamped by the first clamping mechanism and the positioning bracket, the top plate is clamped by the third clamping mechanism and the positioning bracket, the clamping end of the second clamping mechanism is extended, the outer template is moved toward the positioning bracket, and the front and rear ends of the left and right side plates and the top plate are clamped by the second clamping mechanism.

[0010] Weld the left and right side plates to the top plate;

[0011] After welding is completed, open the opening and closing device, move the outer template away from the positioning bracket, retract the clamping end of the second clamping mechanism, place the front and rear side plates of the air box between the outer template and the positioning bracket, close the opening and closing device, move the outer template towards the positioning bracket until the front and rear side plates are clamped by the outer template.

[0012] The internal positioning device is flipped to the welding station with the front side plate facing upward by the displacement and flipping control mechanism, and the weld between the front side plate and the left and right side plates and the top plate is welded.

[0013] After welding is completed, the internal positioning device is flipped to the welding station with the rear side plate facing upward by the displacement and flipping control mechanism, and the weld between the rear side plate and the left and right side plates and the top plate is welded.

[0014] After welding is completed, the internal positioning device is flipped to the top plate facing upward by the displacement and flipping control mechanism, the clamping action of the first clamping mechanism, the third clamping mechanism and the outer template on each plate is released, the opening and closing device is opened, and the welded gas box is taken out.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. This invention achieves precise positioning and clamping of each plate of the air box by setting a positioning bracket, a first clamping mechanism, a third clamping mechanism and an external bracket. Moreover, there are multiple first clamping mechanisms and multiple third clamping mechanisms, which realizes the position positioning and clamping of multiple points of each plate, prevents the deformation of the plate, and thus ensures the welding accuracy.

[0017] 2. The present invention is equipped with an opening and closing device, which can be used to place the plate and remove the welded gas box. At the same time, a third clamping mechanism can be set on the opening and closing device to clamp and position the top plate of the gas box. This facilitates operation and ensures the accuracy of workpiece clamping and welding precision.

[0018] 3. The present invention also includes a displacement and flipping control mechanism, which realizes the flipping and transformation of the welding station, ensuring welding accuracy while improving welding efficiency.

[0019] 4. The present invention also includes multiple second clamping mechanisms. When welding the weld between the left and right side plates and the top plate, the clamping ends of the second clamping mechanisms extend to limit the freedom of the left and right side plates and the top plate in the front and rear directions, ensuring the welding accuracy of the left and right side plates and the top plate. When welding the weld between the left side plate, right side plate, top plate and the front and rear side plates, the clamping ends of the second clamping mechanisms retract to provide additional clamping to the front and rear side plates and to provide clearance space for the laser welding head, ensuring the continuity of the weld and the welding accuracy of the front and rear side plates, thereby improving the welding quality.

[0020] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] Figure 1 This is a schematic diagram of the overall structure of the device disclosed in Embodiment 1;

[0023] Figure 2 This is an exploded view of the gas box structure;

[0024] Figure 3 This is a schematic diagram of the gas box weld seam;

[0025] Figure 4 This is a front view of the device disclosed in Embodiment 1;

[0026] Figure 5 This is a right view of the device disclosed in Embodiment 1;

[0027] Figure 6 This is a cross-sectional view (AA) of the device disclosed in Embodiment 1;

[0028] Figure 7 This is a top view of the device disclosed in Embodiment 1.

[0029] The components are: Ⅰ. Left side plate, Ⅱ. Top plate, Ⅲ. Right side plate, Ⅳ. Top plate, Ⅴ. Right side plate, Ⅵ. Rear side plate, Ⅶ. Front side plate, A. Weld, B. Weld, C. Weld, D. Weld, E. Weld, F. Weld, a. Reference surface, b. Reference surface, c. Reference surface, d. Reference surface, e. Reference surface, f. Reference surface, h. Reference surface, 1. Base, 2. Station locking cylinder, 3. Linear power output device, 4. Spindle, 5. Gear. 6. Rack, 7. Linear bearing, 8. Guide column, 9. Fixing frame, 10. First clamping mechanism, 11. Opening and closing bracket, 12. Opening and closing power output device, 13. Opening and closing mechanism locking device, 14. Outer template, 15. External power output device, 16. Linear bearing, 17. Guide shaft, 18. Second clamping mechanism, 19. Guide block, 20. Clamping block, 21. Third clamping mechanism, 22. Laser welding head, 23. Positioning bracket. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0032] In this invention, terms such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "side," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only to facilitate the description of the structural relationships of the various components or elements of this invention and do not specifically refer to any component or element in this invention. They should not be construed as limiting the invention.

[0033] In this invention, terms such as "fixed connection," "connected," and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can determine the specific meaning of these terms in this invention based on the specific circumstances, and they should not be construed as limitations on the invention.

[0034] Example 1

[0035] The gas-insulated switchgear box is mainly made of 3mm stainless steel plate, which is laser welded together. Figure 2 As shown, the main plates of the air box include left side plate I, top plate II, right side plate III, top plate IV, right side plate V, rear side plate VI, and front side plate VII. The welds requiring welding are as follows: Figure 3As shown, the welds include: weld A between left side plate I and top plate II; weld B between top plate II and right side plate III; weld C between right side plate III and top plate IV; weld D between top plate IV and right side plate V; weld E between front side plate VII and left side plate I, top plate II, right side plate III, top plate IV and right side plate V; and weld F between rear side plate VI and left side plate I, top plate II, right side plate III, top plate IV and right side plate V.

[0036] To prevent clamping deformation of the plates during the welding of gas-insulated switchgear boxes, ensure welding accuracy, and improve welding efficiency, this embodiment discloses an automatic positioning device for welding gas-insulated switchgear boxes, such as... Figures 1-7 As shown, it includes a base 1, an internal positioning device, an opening and closing device, and an external positioning device.

[0037] The internal positioning device includes a fixed frame 9, a positioning bracket 23 and a first clamping mechanism 10. The positioning bracket 23 is connected to the fixed frame 9. The fixed frame 9 is connected to the base 1 through a displacement and flipping control mechanism. The first clamping mechanism 10 is connected to the fixed frame 9 and is used to clamp the left side plate I, right side plate III, and right side plate V of the air box onto the positioning bracket 23.

[0038] The positioning bracket 23 provides reference surfaces for the inner surfaces of the left, right, front, rear, and top side plates and the top plate of the air box, respectively, on the left, right, front, and rear sides. Specifically, the positioning bracket 23 includes reference surfaces a, b, c, d, e, f, and h. During the welding of the air box, it contacts the inner surfaces of the left side plate I, top plate II, right side plate III, top plate IV, right side plate V, rear side plate VI, and front side plate VII, respectively, providing reference surfaces for the inner surfaces of the left side plate I, top plate II, right side plate III, top plate IV, right side plate V, rear side plate VI, and front side plate VII.

[0039] The fixing frame 9 includes a base plate and two side panels, which are respectively connected to the two ends of the base plate. The positioning bracket 23 is connected to the base plate. There are multiple first clamping mechanisms 10. Multiple first clamping mechanisms 10 are fixed on each side panel. One side panel is the left side panel. The first clamping mechanism 10 on the left side panel is used to clamp the left side panel I on the reference surface a of the positioning bracket 23. The other side panel is the right side panel. Multiple first clamping mechanisms 10 on the right side panel are used to clamp the right side panel III on the reference surface c of the positioning bracket 23. The remaining multiple first clamping mechanisms 10 on the right side panel are used to clamp the right side panel V on the reference surface e of the positioning bracket 23.

[0040] Preferably, the first clamping mechanism 10 is a cylinder. The fixed end of the cylinder is fixed to the side plate of the fixing frame 9, and the movable end of the cylinder serves as the clamping end of the first clamping mechanism, facing the positioning bracket 23. The extension and retraction of the cylinder achieves clamping of the left and right side plates of the air box.

[0041] The displacement and flipping control mechanism includes a meshing gear 5 and a rack 6. The gear 5 is connected to the main shaft 4 and can drive the main shaft 4 to rotate. The main shaft 4 is connected to the fixed frame 9 and can drive the fixed frame 9 to rotate. The rack 6 is connected to the linear power output device 3. The linear power output device 3 drives the rack 6 to move up and down, and then drives the gear 5 to rotate. The rotation of the gear 5 drives the main shaft to rotate, and finally drives the fixed frame 9 to rotate around the axis of the main shaft. This allows for the conversion between the front, middle and rear welding stations. The axis of the main shaft 4 is perpendicular to the reference planes a, c and e of the positioning bracket, and parallel to the reference planes b, d, f and h.

[0042] To ensure stability after the welding station conversion is completed, a station locking cylinder 2 is installed. The fixed end of the station locking cylinder 2 is placed on the base, and the movable end of the station locking cylinder 2 faces the fixed frame 9. After the welding station conversion is completed, the locating pin of the movable end of the station locking cylinder 2 is inserted into the locating pin hole on the fixed frame 9 to lock the station of the fixed frame 9 and ensure the stability of the welding station.

[0043] To ensure the stability of the rack movement, the rack 6 is fixed to the rack bracket, which is connected to the guide post 8 and can move up and down along the guide post 8. The rack bracket is also connected to the linear power output device 3, which provides power for the up and down movement of the rack bracket. When the linear power output device 3 drives the rack bracket to move up and down along the guide post 8, it also drives the rack 6 to move up and down.

[0044] To ensure smooth and stable movement of the rack support along the guide post 8, a linear bearing 7 is installed at the connection between the rack support and the guide post. The rack support is connected to the linear bearing 7, which is sleeved on the guide post 8 and can move up and down along the guide post 8.

[0045] The rack support includes an upper support and a lower support, which are respectively connected to the two ends of the rack. Both ends of the upper and lower supports are connected to linear bearings 7, which are respectively sleeved on two guide columns 8. The linear power output device 3 is connected to the upper support and can drive the upper support to move up and down along the guide columns 8.

[0046] Preferably, the linear power output device 3 is a cylinder. The fixed end of the cylinder is connected to the base, and the movable end of the cylinder is connected to the rack support. The extension and retraction of the cylinder drives the rack support to move up and down.

[0047] The opening and closing device includes two opposing opening and closing brackets 11, both of which are connected to a fixed frame and can rotate relative to the fixed frame. A third clamping mechanism 21 is also provided on each opening and closing bracket 11, which is used to clamp the top plate II and top plate IV of the air box to the positioning bracket 23. When the two opening and closing brackets 11 are rotated open, openings are formed at the positioning brackets for each plate of the air supply box. When the two opening and closing brackets 11 are rotated closed, the top plate can be clamped by the third clamping mechanism 21, the positioning bracket 23, and the second clamping mechanism 18.

[0048] Specifically, since the top plate II has a larger area, multiple third clamping mechanisms 21 are provided to clamp the top plate II. Since the top plate IV has a smaller area, only one third clamping mechanism 21 is provided to clamp the top plate IV.

[0049] In order to drive the opening and closing bracket to rotate and realize the opening and closing of the opening and closing bracket 11, an opening and closing power output device 12 is provided. The opening and closing bracket 11 is connected to the opening and closing power output device 12, and the opening and closing power output device 12 provides power for the rotation of the opening and closing bracket 11.

[0050] Preferably, the opening and closing power output device 12 is a cylinder. The cylinder is fixed on the fixed frame, and the movable end of the cylinder is connected to the opening and closing bracket 11. The cylinder extends and retracts, causing the opening and closing bracket 11 to rotate relative to the fixed frame, thereby realizing the opening and closing of the two opening and closing brackets 11.

[0051] To ensure the stability of the two opening and closing brackets 11 after they are closed and to prevent the opening and closing brackets 11 from opening, an opening and closing mechanism locking device 13 is also provided to lock the closed opening and closing brackets 11.

[0052] Preferably, the locking device 13 of the opening and closing mechanism is a cylinder. The fixed end of the cylinder is fixed on the fixed frame 9, and the movable end faces the contact position of the two opening and closing brackets when they are closed. When the two opening and closing brackets are closed, the movable end of the locking device 13 of the opening and closing mechanism abuts against the contact position of the two opening and closing brackets to prevent the two opening and closing brackets from opening and to ensure the clamping effect of the third clamping mechanism on the top plate.

[0053] The external positioning device is used to position and clamp the front side panel VII and the rear side panel VI, as well as to clamp the left and right side panels and the top panel in the front-to-back direction. The external positioning device includes an external bracket, an outer template 14, an external power output device 15, and a second clamping mechanism. The external bracket is connected to the fixed frame 9. The external power output device 15 is fixed on the external bracket and connected to the outer template 14. It can drive the outer template 14 to move towards the positioning bracket. The front side panel VII and the rear side panel VI of the air box are clamped by the outer template and the positioning bracket. The clamping end of the second clamping mechanism can extend and retract. When the clamping end of the second clamping mechanism extends, it can clamp the left and right side panels and the top panel in the front-to-back direction.

[0054] Specifically, there are two outer templates, which are respectively set on the front and rear sides of the positioning bracket to cooperate with the positioning bracket and clamp the front and rear side plates of the air box.

[0055] The base plate of the fixing frame 9 is a quadrilateral plate, with two opposite sides of the quadrilateral connected to the side panel and the other two opposite sides connected to the external positioning device.

[0056] To ensure the stability of the outer template movement, the outer template 14 is connected to the linear bearing 16, the linear bearing 16 is connected to the guide shaft 17 and can move along the guide shaft 17, and the guide shaft is connected to the external support.

[0057] The external power output device 15 uses a cylinder, which is fixed on an external bracket. The movable end of the cylinder is connected to the outer template 14. The cylinder's extension and retraction drive the outer template 14 to move closer to or further away from the positioning bracket.

[0058] Because weld seam E and weld seam F need to be welded, the size of the outer template is set to be smaller than that of the front and rear side plates. This makes it impossible to limit the front and rear of the left and right side plates and the top plate when welding weld seams A, B, C and D, so as to ensure the welding accuracy of the left and right side plates and the top plate in the front and rear directions.

[0059] Therefore, this embodiment also includes a second clamping mechanism, which ensures that the left side plate, right side plate, and top plate are aligned in the front-to-back direction when welding welds A, B, C, and D, and ensures the continuity of welds when welding welds E and F.

[0060] Specifically, the second clamping mechanism is used to clamp the left and right side plates and the top plate in the front-back direction when welding the weld between the left and right side plates and the top plate, or to clamp the front and rear side plates when welding the weld between the left side plate, right side plate, top plate and the front and rear side plates.

[0061] Each clamping end of the second clamping mechanism 18 is connected to the clamping block 20. The clamping block 20 is connected to the guide block 19 and can move relative to the guide block 19. The clamping block 20 is moved by the second clamping mechanism 18. When the clamping block 20 extends, it clamps the left and right side plates and the top plate of the air box in the front-to-back direction. When the clamping block 20 retracts, it clamps the front and back plates and avoids the welding of welds E and F to ensure the continuity of the weld.

[0062] In order to effectively clamp the left and right side plates and the top plate in the front and rear directions, and to make the clamping force of each plate of the air box uniform, thereby preventing clamping deformation, the clamping end of each second clamping mechanism 18 is connected to a clamping block bracket, and clamping blocks 20 are connected to both ends of the clamping block bracket. Each clamping block 20 is sleeved on the guide block 19, and the guide block 19 provides guidance for the movement of the clamping block 20.

[0063] A second clamping mechanism 18 drives two clamping blocks 20 to clamp the side plate or top plate of the air box, ensuring the synchronicity of the movement of the two clamping points and the coplanarity of the two clamping points, thereby improving the positioning accuracy of the plate.

[0064] Specifically, the second clamping mechanism 18 is installed on the outer template, with a total of eight, including two second clamping mechanisms for the left side plate, two second clamping mechanisms for the right side plate, two second clamping mechanisms for the top plate II, and two second clamping mechanisms for the top plate IV.

[0065] There are two outer templates, and each outer template is equipped with a second clamping mechanism for the left side plate, a second clamping mechanism for the right side plate, a second clamping mechanism for the top plate II, and a second clamping mechanism for the top plate IV.

[0066] When the clamping ends of the second clamping mechanisms on the two left side plates extend, they limit the front-to-back direction of the left side plates.

[0067] When the clamping ends of the second clamping mechanisms on the two right side plates extend, they limit the front-to-back direction of the right side plates.

[0068] When the clamping ends of the second clamping mechanisms of the two top plates II extend, they clamp the top plates II in the front-back direction.

[0069] When the clamping ends of the second clamping mechanism of the two top plates IV extend, they clamp the top plates IV in the front-back direction.

[0070] When the clamping ends of the second clamping mechanism of the left side plate, the second clamping mechanism of the rear side plate, the second clamping mechanism of the top plate II, and the second clamping mechanism of the top plate IV are retracted, the front and rear side plates are clamped.

[0071] To prevent interference between the outer template and the clamping end of the second clamping mechanism, a slot is provided on the outer template to avoid the extension and retraction movement of the clamping end of the second clamping mechanism.

[0072] Preferably, the second clamping mechanism is a cylinder. The fixed end of the cylinder is fixed, and the movable end is connected to the clamping block 20 as the clamping end of the second clamping mechanism. The clamping block 20 is moved by the extension and retraction of the cylinder.

[0073] The welding control and positioning device disclosed in this embodiment performs the following welding operation when welding the gas box of a gas-insulated switchgear:

[0074] The opening and closing device is opened by opening and closing power output device, and the left and right side plates of the air box are placed between the left and right planes of the first clamping mechanism and the positioning bracket, respectively, and the top plate of the air box is placed on the top surface of the positioning bracket.

[0075] The opening and closing device is closed by the opening and closing power output device, and the opening and closing device is locked by the opening and closing mechanism locking device;

[0076] The left and right side plates are clamped by the first clamping mechanism and the positioning bracket, and the top plate is clamped by the third clamping mechanism, the second clamping mechanism and the positioning bracket. The outer template is moved towards the positioning bracket by the external power output device, the clamping end of the second clamping mechanism extends out, and the two ends of the left and right side plates and the top plate are clamped, thus limiting the front and rear directions of the left and right side plates and the top plate.

[0077] Welding is performed using laser welding head 22 to weld the seams between the left and right side plates and the top plate, namely welds A, B, C and D;

[0078] After welding is completed, release the locking device of the opening and closing mechanism from the locking action of the opening and closing device, open the opening and closing device through the opening and closing power output device, move the outer template away from the positioning bracket through the external power output device, retract the clamping end of the second clamping mechanism, place the front and rear side plates of the air box between the outer template and the positioning bracket, close the opening and closing device through the opening and closing power output device, lock the opening and closing device through the opening and closing mechanism locking device, move the outer template towards the positioning bracket through the external power output device, and clamp the front and rear side plates.

[0079] The internal positioning device is flipped to the welding station with the front side plate facing upward by the displacement and flipping control mechanism, and the internal positioning device is locked by the station locking cylinder 2. The weld between the front side plate and the left and right side plates and the top plate is welded by the laser welding head 22, that is, weld seam E.

[0080] After welding is completed, release the locking effect of the station locking cylinder 2 on the internal positioning device, and control the internal positioning device to flip to the welding station with the rear side plate facing upward by the displacement flipping control mechanism. Lock the internal positioning device by the station locking cylinder 2, and weld the weld between the rear side plate and the left and right side plates and the top plate, i.e. weld weld F.

[0081] After welding is completed, the locking effect of the station locking cylinder 2 on the internal positioning device is released. The internal positioning device is flipped to the upward position of the opening and closing device by the displacement and flipping control mechanism. The clamping of the first clamping mechanism, the third clamping mechanism and the outer template on the left and right side plates, the top plate and the front and rear side plates is released. The locking effect of the opening and closing mechanism locking device on the opening and closing device is released. The opening and closing device is opened by the opening and closing power output device, and the welded air box is taken out.

[0082] The device disclosed in this embodiment provides a positioning reference for the inner surface of each plate of the air box through a positioning bracket. The outer surface of each plate is positioned through a first locking mechanism, a third locking mechanism, and an outer template. In cooperation with the positioning bracket and the second locking mechanism, the inner and outer surfaces of each plate of the air box are positioned. The second locking mechanism clamps the left and right side plates and the top plate in the front and back directions, thereby completing the positioning and locking of each plate, ensuring the positioning and locking accuracy of each plate, preventing plate deformation, and thus ensuring welding accuracy.

[0083] An opening and closing device provides an entrance and exit for the placement of each plate in the gas box, and a displacement and flipping control mechanism is set up to switch the welding station. No secondary positioning and clamping is required, which improves welding efficiency and further ensures welding accuracy.

[0084] Example 2

[0085] In this embodiment, a welding method for an automatic positioning device for welding gas boxes of gas-insulated switchgear disclosed in Embodiment 1 is disclosed, comprising:

[0086] Open the opening and closing device, place the left and right side plates of the air box between the first clamping mechanism and the positioning bracket, place the top plate of the air box on the top of the positioning bracket, and close the opening and closing device.

[0087] The left and right side plates are clamped by the first clamping mechanism and the positioning bracket, the top plate is clamped by the third clamping mechanism and the positioning bracket, the clamping end of the second clamping mechanism is extended, the outer template is moved toward the positioning bracket, and the front and rear ends of the left and right side plates and the top plate are clamped by the second clamping mechanism.

[0088] Weld the left and right side plates to the top plate;

[0089] After welding is completed, open the opening and closing device, move the outer template away from the positioning bracket, and retract the clamping end of the second clamping mechanism to avoid the weld joint when welding welds E and F. Place the front and rear side plates of the air box between the outer template and the positioning bracket, close the opening and closing device, move the outer template towards the positioning bracket until the front and rear side plates are clamped by the outer template.

[0090] The internal positioning device is flipped to the welding station with the front side plate facing upward by the displacement and flipping control mechanism, and the weld between the front side plate and the left and right side plates and the top plate is welded.

[0091] After welding is completed, the internal positioning device is flipped to the welding station with the rear side plate facing upward by the displacement and flipping control mechanism, and the weld between the rear side plate and the left and right side plates and the top plate is welded.

[0092] After welding is completed, the internal positioning device is flipped to the top plate facing upward by the displacement and flipping control mechanism, the clamping action of the first clamping mechanism, the third clamping mechanism and the outer template on each plate is released, the opening and closing device is opened, and the welded gas box is taken out.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A welding method for an automatic positioning device for welding gas boxes of gas-insulated switchgear, comprising a base, an internal positioning device, an opening and closing device, and an external positioning device. The internal positioning device includes a fixed frame, a positioning bracket, and a first clamping mechanism. The positioning bracket is connected to the fixed frame, and the fixed frame is connected to the base via a displacement and flipping control mechanism. The first clamping mechanism is connected to the fixed frame and is used to clamp the left and right side plates of the gas box onto the positioning bracket. The opening and closing device includes two opposing opening and closing brackets, both of which are connected to the fixed frame and are rotatable relative to the fixed frame. A third clamping mechanism is provided on the opening and closing brackets, which is used to clamp the top plate of the gas box onto the positioning bracket. The external positioning device includes an outer template and a second clamping mechanism. The outer template is movable back and forth relative to the positioning bracket, and the front and rear side plates of the gas box are clamped by the outer template and the positioning bracket. The clamping end of the second clamping mechanism can extend and retract. When the clamping end of the second clamping mechanism extends, it can clamp the left and right side plates and the top plate in the front and rear directions. The second clamping mechanism is fixed to the outer template; the outer template is connected to an external power output device, which drives the outer template to move relative to the positioning bracket. There are two outer templates, which are respectively set on the front and rear sides of the positioning bracket to cooperate with the positioning bracket and clamp the front and rear side plates of the air box. Each clamping end of the second clamping mechanism is connected to the clamping block, the clamping block is connected to the guide block and can move relative to the guide block. The clamping block is moved by the second clamping mechanism, and the clamping block clamps the left and right side plates and the top plate of the air box in the front and back direction. The opening and closing bracket is connected to the opening and closing power output device, which provides power for the rotation of the opening and closing bracket. Its features are, include: Open the opening and closing device, place the left and right side plates of the air box between the first clamping mechanism and the positioning bracket, place the top plate of the air box on the top of the positioning bracket, and close the opening and closing device. The left and right side plates are clamped by the first clamping mechanism and the positioning bracket, the top plate is clamped by the third clamping mechanism and the positioning bracket, the clamping end of the second clamping mechanism is extended, the outer template is moved toward the positioning bracket, and the front and rear ends of the left and right side plates and the top plate are clamped by the second clamping mechanism. Weld the left and right side plates to the top plate; After welding is completed, open the opening and closing device, move the outer template away from the positioning bracket, retract the clamping end of the second clamping mechanism, place the front and rear side plates of the air box between the outer template and the positioning bracket, close the opening and closing device, move the outer template towards the positioning bracket until the front and rear side plates are clamped by the outer template. The internal positioning device is flipped to the welding station with the front side plate facing upward by the displacement and flipping control mechanism, and the weld between the front side plate and the left and right side plates and the top plate is welded. After welding is completed, the internal positioning device is flipped to the welding station with the rear side plate facing upward by the displacement and flipping control mechanism, and the weld between the rear side plate and the left and right side plates and the top plate is welded. After welding is completed, the internal positioning device is flipped to the top plate facing upward by the displacement and flipping control mechanism, the clamping action of the first clamping mechanism, the third clamping mechanism and the outer template on each plate is released, the opening and closing device is opened, and the welded gas box is taken out.

2. The welding method of the automatic positioning device for welding gas boxes of gas-insulated switchgear as described in claim 1, characterized in that, The left, right, front, rear, and top planes of the positioning bracket provide reference surfaces for the inner surfaces of the left, right, front, and rear side plates and the top plate of the air box, respectively.

3. The welding method of the automatic positioning device for welding gas boxes of gas-insulated switchgear as described in claim 1, characterized in that, The displacement and tilting control mechanism includes meshing gears and racks. The gears are connected to the main shaft and can drive the main shaft to rotate. The main shaft is connected to the fixed frame and can drive the fixed frame to rotate. The rack is connected to the linear power output device.

4. The welding method of the automatic positioning device for welding gas boxes of gas-insulated switchgear as described in claim 1, characterized in that, The fixing frame includes a base plate and two side panels, which are respectively connected to the two ends of the base plate. The positioning bracket is connected to the base plate, and multiple first clamping mechanisms are fixed on each side panel.

5. The welding method of the automatic positioning device for welding gas boxes of gas-insulated switchgear as described in claim 1, characterized in that, The external power output device is fixed on the external bracket, and the external bracket is connected to the fixed frame.

6. The welding method of the automatic positioning device for welding gas boxes of gas-insulated switchgear as described in claim 1, characterized in that, The outer template is connected to the linear bearing, the linear bearing is connected to the guide shaft and can move along the guide shaft, and the guide shaft is connected to the external support.

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