A tank welding equipment

Abstract

This utility model discloses a tank welding equipment, including: a frame, a tungsten electrode assembly, and a tank to be welded. The tank to be welded includes a tank body and an end cap. An active clamping mechanism is integrated on the frame. The active clamping mechanism includes a clamping component, a clamping block, an elastic component, a tightening component, and a lifting component. A driven abutting mechanism and a pressing mechanism are respectively arranged on both sides of the active clamping mechanism. This utility model shortens the welding cycle of a single tank by using multiple mechanisms such as an electric push rod to lift the tightening component and a telescopic cylinder to drive the pressing head, which significantly improves efficiency compared to traditional manual production lines. Furthermore, the double protrusion structure of the clamping block independently abuts the tank body and the end cap, and the axial pressing force of the pressing mechanism and the limiting of the driven abutting mechanism reduce the bevel angle error, avoid defects such as incomplete penetration and incomplete fusion, and improve the pass rate of radiographic inspection.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a tank welding device. Background Technology

[0002] As critical safety equipment in nuclear power plants, instrument tanks have extremely stringent requirements for sealing and structural integrity. Traditional instrument tank manufacturing typically employs manual assembly and welding, which presents the following technical bottlenecks: First, manual operation struggles to meet the stringent dimensional tolerances of the circumferential seams between the tank body and the head, easily leading to defects such as incomplete weld penetration and lack of fusion, for which nuclear power standards require zero tolerance. Second, nuclear power instrument tanks require multiple processes including assembly, spot welding, and full welding; however, traditional production lines operate with isolated workstations, relying on manual handling and repetitive positioning, easily resulting in unbalanced workstation cycles, high equipment idle rates, and difficulty in increasing production capacity.

[0003] Therefore, there is an urgent need for an automated welding equipment that integrates high-precision adaptive clamping and multi-station collaborative control to break through the quality and efficiency bottlenecks in the manufacturing of nuclear power instrument tanks. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems of the aforementioned tank welding equipment, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a tank welding equipment that solves problems such as "insufficient precision and limited production efficiency".

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a tank welding device, comprising: a frame, a tungsten electrode assembly, and a tank to be welded, wherein the tank to be welded includes a tank body and an end cap, and an active clamping mechanism is integrated on the frame, wherein the active clamping mechanism includes a clamping component, a clamping block, an elastic component, a tightening component, and a lifting component; a driven abutment mechanism and a pressing mechanism are respectively provided on both sides of the active clamping mechanism;

[0008] The active clamping mechanism is used to clamp and drive the can to be welded to rotate, and the driven pressing mechanism works in conjunction with the pressing mechanism to press the end cap against the can body.

[0009] In a preferred embodiment of the tank welding equipment of this utility model, the clamping mechanism includes a support frame fixedly mounted above the frame, a telescopic cylinder fixedly mounted on the support frame, a slider fixedly mounted on the telescopic end of the cylinder, a push column fixedly mounted on the slider, and a clamping head fixedly mounted on one end of the push column.

[0010] In a preferred embodiment of the tank welding equipment of this utility model, the clamping assembly includes an indexing plate, a servo motor, and grippers. The indexing plate is fixedly mounted on a support frame, and the servo motor is located on one side of the indexing plate.

[0011] In a preferred embodiment of the tank welding equipment of this utility model, the indexing plate includes a fixed part and a rotating chuck. The fixed part is internally equipped with a worm gear transmission part. The output end of the servo motor is connected to the transmission part. The gripper is fixed to the movable end of the chuck. The chuck is internally equipped with a screw transmission part and is driven by a tightening port.

[0012] In a preferred embodiment of the tank welding equipment of this utility model, the tightening assembly includes a geared motor and a tightening head. The tightening head is fixedly connected to the output end of the geared motor, and when the tightening head moves upward, it abuts against the tightening port.

[0013] In a preferred embodiment of the tank welding equipment of this utility model, the lifting assembly includes a fixed frame fixedly installed within a frame, and an electric push rod is fixedly installed on the fixed frame. The telescopic end of the electric push rod is detachably installed with a slide table and a reduction motor.

[0014] As a preferred embodiment of the tank welding equipment of this utility model, the clamping block is detachably installed on the end of the clamping claw, and the clamping block is an integral structure, which includes a fixing block and two protrusions.

[0015] In a preferred embodiment of the tank welding equipment of this utility model, the elastic component is disposed in the middle of the gripper, the elastic component includes a sliding rod, a clamping block and a spring, the sliding rod is slidably inserted on the gripper, the clamping block is fixedly connected to the sliding rod, the spring is sleeved on the sliding rod, and the two ends of the spring are respectively fixed on the clamping block and the gripper.

[0016] In a preferred embodiment of the tank welding equipment of this utility model, the driven clamping mechanism includes a drive motor, a lead screw, and a limiting slide rail. The drive motor and the limiting slide rail are fixedly mounted on the frame, and the output end of the drive motor is fixedly connected to the lead screw. A nut is sleeved on the lead screw, and the nut is threadedly connected to the lead screw. The nut is rotatably mounted with a rotating chuck via a connecting piece. The rotating chuck and the clamping head are concentrically arranged, and an air inlet pipe is inserted at the center of the rotating chuck. The connecting piece is slidably mounted on the limiting slide rail to restrict the circumferential rotation of the nut.

[0017] As a preferred embodiment of the tank welding equipment of this utility model, the driven clamping mechanism further includes a protective cover, which is fixedly mounted on the frame and has a limiting hole, and the connecting member is slidably mounted in the limiting hole.

[0018] The beneficial effects of this utility model are as follows: By coordinating the control of multiple mechanisms such as the electric push rod lifting the tightening assembly and the telescopic cylinder driving the clamping head, the welding cycle of a single tank is shortened, resulting in a significant improvement in efficiency compared to traditional production lines; Furthermore, the double-protruding structure of the clamping block independently clamps the tank body and end cap respectively, and the axial clamping force of the clamping mechanism and the automatic positioning of the positioning groove of the driven clamping mechanism reduce the bevel angle error, fundamentally avoiding defects such as incomplete penetration and incomplete fusion, and improving the pass rate of radiographic inspection; In addition, the rotating chuck has a built-in air inlet pipe, which can introduce cooling gas into the tank and vent air during the spot welding stage to form a protective air curtain; Combined with the precise welding of the tungsten electrode assembly, it effectively inhibits the oxidation of alloying elements and ensures the metallurgical quality of the weld. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0020] Figure 1 This is a structural schematic diagram of a tank welding equipment according to the present invention.

[0021] Figure 2 This is a partial structural schematic diagram of a tank welding equipment according to the present invention.

[0022] Figure 3 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0023] Figure 4 This is a schematic diagram of the internal structure of the frame in this utility model.

[0024] Figure 5This is a structural diagram of the positioning preparation state in this utility model.

[0025] Figure 6 This is a schematic diagram of the structure in the spot welding state of this utility model.

[0026] Figure 7 This is a schematic diagram of the structure in the fully welded state of this utility model.

[0027] Figure Descriptions: 100, Frame; 200, Active clamping mechanism; 201, Clamping assembly; 201a, Indexing plate; 201b, Servo motor; 201c, Gripper; 202, Clamping block; 203, Elastic assembly; 203a, Slide rod; 203b, Abutting block; 203c, Spring; 204, Tightening assembly; 205, Lifting assembly; 205a, Fixing frame; 205b, Electric push rod; 205c, Slide table; 300, Driven abutting mechanism; 301, Drive motor; 302, Lead screw; 303, Nut; 304, Connector; 305, Rotating chuck; 400, Pressing mechanism; 401, Support frame; 402, Telescopic cylinder; 403, Slider; 404, Push column; 405, Pressing head; 500, Tungsten electrode assembly. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0031] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0032] Example 1

[0033] Reference Figure 1 , Figure 2 and Figure 4 This is the first embodiment of the present invention. This embodiment provides a tank welding device that improves production efficiency. It includes: a frame 100, a tungsten electrode assembly 500, and a tank to be welded. The tungsten electrode assembly 500 is fixedly mounted on the frame 100 and is used for replacing the tungsten electrode of the welding torch. The tank to be welded includes a tank body and an end cap. An active clamping mechanism 200 is integrated on the frame 100. The active clamping mechanism 200 includes a clamping component 201, a clamping block 202, an elastic component 203, a tightening component 204, and a lifting component 205. A driven abutment mechanism 300 and a pressing mechanism 400 are respectively provided on both sides of the active clamping mechanism 200.

[0034] In use, the tank body and end cap are clamped by the clamping component 201, and the driven pressing mechanism 300 and the pressing mechanism 400 are pressed against each other to make the end cap fit with the tank body, and then spot welding is performed; after spot welding is completed, the clamping component 201 is used to clamp the tank again and drive the tank to be welded to rotate, and then full welding is performed. The various processes work together to improve production efficiency.

[0035] Example 2

[0036] Reference Figures 1 to 7 This is the second embodiment of the present invention. Unlike the previous embodiment, the pressing mechanism 400 includes a support frame 401 fixedly mounted above the frame 100. A telescopic cylinder 402 is fixedly mounted on the support frame 401, and a slider 403 is fixedly mounted on its telescopic end. (Refer to...) Figure 2 The telescopic cylinder 402 drives the slider 403 to move axially. A pusher 404 is fixedly installed on the slider 403. A pressing head 405 is fixedly installed at one end of the pusher 404. The slider 403 drives the pressing head 405 to move axially through the pusher 404. When the pressing head 405 contacts the tank to be welded, it can press the tank body and end cap.

[0037] Furthermore, refer to Figures 1-3The clamping assembly 201 includes an indexing plate 201a, a servo motor 201b, and a gripper 201c. The indexing plate 201a is fixedly mounted on the support frame 401, and the servo motor 201b is located on one side of the indexing plate 201a. The indexing plate 201a includes a fixed part and a rotating chuck. The fixed part integrates a worm gear transmission part. The servo motor 201b drives the worm gear transmission part, which in turn drives the rotating chuck of the indexing plate 201a to rotate. The worm gear transmission part (a common transmission structure, not shown in the figure) includes a worm and a worm wheel that cooperate with each other and two bevel gears. The output end of the servo motor 201b is connected to the transmission part. The servo motor 201b drives the worm to rotate, which, in conjunction with the worm wheel and bevel gears, drives the rotation transmission, thereby driving the rotating chuck to rotate. The jaw 201c is fixed to the movable end of the chuck. The chuck is equipped with a screw transmission part and is driven by a tightening port. The chuck can refer to the existing standard three-jaw chuck structure. The geared motor drives the tightening head to rotate, which pushes the jaw 201c to retract radially through the screw transmission part inside the chuck.

[0038] It should be noted that the gripper 201c is compatible with workpieces with lengths of 250mm-400mm, and workpieces of different diameters can be made compatible by replacing the gripper 201c.

[0039] Furthermore, refer to Figure 4 The tightening assembly 204 includes a geared motor and a tightening head. The tightening head is fixedly connected to the output end of the geared motor and is driven to rotate by the geared motor. When the tightening head moves upward, it abuts against the tightening port and drives the tightening port through the geared motor and the tightening head to realize the movement of the movable end of the chuck.

[0040] Furthermore, refer to Figure 4 The lifting component 205 includes a fixed frame 205a fixedly installed within the frame 100. An electric push rod 205b is fixedly installed on the fixed frame 205a. The telescopic end of the electric push rod 205b is detachably installed with the reduction motor via a slide table 205c. The electric push rod 205b and the slide table 205c drive the lifting and lowering of the tightening component 204 to realize the insertion and separation of the tightening head and the tightening port.

[0041] Furthermore, refer to Figure 3 and Figure 5 The clamping block 202 is detachably installed at the end of the gripper 201c. The clamping block 202 is an integral structure, which includes a fixing block and two protrusions. The two protrusions abut against the can body and the end cap respectively, making it convenient to clamp and position them.

[0042] Furthermore, refer to Figure 3The elastic component 203 is located in the middle of the gripper 201c. The elastic component 203 includes a slide rod 203a, a clamping block 203b, and a spring 203c. The slide rod 203a is slidably inserted into the gripper 201c. The clamping block 203b is fixedly connected to the slide rod 203a. The spring 203c is sleeved on the slide rod 203a, and both ends of the spring 203c are fixedly installed on the clamping block 203b and the gripper 201c, respectively. In the positioning preparation stage, the can is placed in the middle of multiple grippers 201c, driving multiple grippers 201c to move towards the center, and the can is pre-clamped by the clamping block 203b. At this time, it is necessary to ensure that there is enough gap so that the end cap can be put into the fixture, and also to ensure that the can achieve a certain centering accuracy.

[0043] It should be noted that the spring 203c is made of 60Si2MnA spring steel with a wire diameter of 1.2mm, and the preload is set to 150±5N.

[0044] Furthermore, refer to Figure 2 The driven clamping mechanism 300 includes a drive motor 301, a lead screw 302, and a limiting slide rail. The drive motor 301 and the limiting slide rail are fixedly mounted on the frame 100, and the output end of the drive motor 301 is fixedly connected to the lead screw 302. The drive motor 301 drives the lead screw 302 to rotate. A nut 303 is sleeved on the lead screw 302, and the nut 303 is threadedly connected to the lead screw 302. The rotation of the lead screw 302 causes the nut 303 to move axially. The nut 303 is rotatably mounted with a rotating chuck 305 via a connecting member 304. The nut 303 drives the rotating chuck 305 to move via the connecting member 304. The rotating chuck 305 is connected to the clamping head. 405 are concentrically arranged, and each has a positioning groove at the center that matches the end cap. When the rotating chuck 305 and the clamping head 405 abut against one end of the tank to be welded, the tank body and end cap are clamped and positioned, which can reduce angular error. At this time, the tank to be welded is spot welded. The rotating chuck 305 has an air inlet pipe inserted at the center, which is used to introduce cooling gas (such as argon) into the tank body to vent the air in the tank body. The connecting piece 304 is slidably arranged on the limiting slide rail, which is used to limit the circumferential rotation of the nut 303, so that the nut 303 only moves axially along the limiting slide rail. The driven clamping mechanism 300 also includes a protective cover, which is fixedly arranged on the frame 100.

[0045] In use, the servo motor 201b drives the indexing plate 201a to rotate to the tightening preparation position, at which point the tightening port and tightening head are aligned. The gripping robot picks up the can and places it between multiple grippers 201c. Then, the electric push rod 205b and the slide table 205c drive the tightening head upwards into the tightening port. The geared motor, in conjunction with the tightening head, drives the tightening port to move the movable end of the chuck, causing the multiple grippers 201c to move towards the center. This allows the clamping block 203b to pre-clamp the can, ensuring sufficient clearance for the end cap to be placed in the fixture while also achieving a certain level of alignment accuracy for the can. The end cap is picked up and placed between the grippers 201c, bringing it into contact with the can. At this point, the geared motor further drives the grippers 201c to retract, causing the two protrusions of the clamping block 202 to abut against the can and the end cap respectively, clamping them and bringing the end cap and can into a positioning preparation state. Finally, the drive motor 301 drives the rotating chuck 3... 05. The robot moves forward and presses against the end cap. The telescopic cylinder 402 drives the clamping head 405 forward to press and fit the can body and end cap together. The reduction motor further drives the gripper 201c to retract, making the can body and end cap fully positioned. At this time, cooling gas is introduced into the can body through the air inlet pipe to purge the air inside the can body. The welding robot then performs spot welding on the can body to be welded. After completion, the gripping robot moves to the gripping position, grips the can body, and the reduction motor rotates to release the gripper 201c, reaching the fully open state of the part removal. The drive motor 301 drives the rotating chuck 305 to move backward and separate from the end cap. The gripping robot removes the can body, rotates it 180 degrees, and puts it back between the grippers 201c. The gripping robot then grabs another end cap and puts it between the grippers 201c, repeating the above operation to perform spot welding on the end cap. After spot welding, the gripping robot removes the can body and repositions it using the grippers 201c and rotating chuck 305 (refer to...). Figure 7 (Status), the servo motor 201b drives the indexing plate 201a to rotate at a preset angle, cooperating with the welding robot to perform full circumferential welding.

[0046] It is worth noting that the welding robot uses an ABBIRB2600 robot, the gripping robot uses an IRB 4600 robot, and the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship, specific circuit structure, and robot timing synchronization and obstacle avoidance logic will not be described in detail here.

[0047] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A can body welding apparatus comprising a frame (100), a tungsten electrode assembly (500) and a can to be welded, the can to be welded comprising a can body and an end closure, characterised in that: An active clamping mechanism (200) is integrated on the frame (100). The active clamping mechanism (200) includes a clamping component (201), a clamping block (202), an elastic component (203), a tightening component (204), and a lifting component (205). A driven abutment mechanism (300) and a pressing mechanism (400) are respectively provided on both sides of the active clamping mechanism (200). The active clamping mechanism (200) is used to clamp and drive the can to be welded to rotate, and the driven pressing mechanism (300) and the pressing mechanism (400) work together to press the end cap and the can body together.

2. The can body welding apparatus according to claim 1, characterized by: The pressing mechanism (400) includes a support frame (401) fixedly mounted above the frame (100). A telescopic cylinder (402) is fixedly mounted on the support frame (401), and a slider (403) is fixedly mounted on its telescopic end. A push column (404) is fixedly mounted on the slider (403), and a pressing head (405) is fixedly mounted on one end of the push column (404).

3. The can body welding apparatus according to claim 2, characterized by: The clamping assembly (201) includes an indexing plate (201a), a servo motor (201b), and a gripper (201c), wherein the indexing plate (201a) is fixedly mounted on the support frame (401).

4. The can body welding apparatus according to claim 3, characterized by: The indexing plate (201a) includes a fixed part and a rotating chuck. The output end of the servo motor (201b) drives the rotating chuck to rotate through the worm gear transmission part. The gripper (201c) is fixed to the movable end of the chuck. The chuck is provided with a screw transmission part and is driven through a tightening port.

5. The can body welding apparatus according to claim 4, characterized by: The tightening assembly (204) includes a geared motor and a tightening head. The tightening head is fixedly connected to the output end of the geared motor, and when the tightening head moves upward, it abuts against the tightening port.

6. The can body welding apparatus according to claim 5, characterized by: The lifting assembly (205) includes a fixed frame (205a) fixedly installed in the frame (100), and an electric push rod (205b) is fixedly installed on the fixed frame (205a). The telescopic end of the electric push rod (205b) is detachably installed with the reduction motor via a slide table (205c).

7. The can body welding apparatus according to claim 3, characterized by: The clamping block (202) is detachably installed at the end of the gripper (201c). The clamping block (202) is an integral structure, which includes a fixing block and two protrusions.

8. The can body welding apparatus according to claim 3, characterized by: The elastic component (203) is disposed in the middle of the gripper (201c). The elastic component (203) includes a slide rod (203a), a clamping block (203b), and a spring (203c). The slide rod (203a) is slidably inserted into the gripper (201c). The clamping block (203b) is fixedly connected to the slide rod (203a). The spring (203c) is sleeved on the slide rod (203a), and both ends of the spring (203c) are fixedly disposed on the clamping block (203b) and the gripper (201c), respectively.

9. The can body welding apparatus according to claim 1, characterized by: The driven clamping mechanism (300) includes a drive motor (301), a lead screw (302), and a limiting slide rail. The drive motor (301) and the limiting slide rail are fixedly mounted on the frame (100), and the output end of the drive motor (301) is fixedly connected to the lead screw (302). A nut (303) is sleeved on the lead screw (302), and the nut (303) is threadedly connected to the lead screw (302). The nut (303) is rotatably mounted with a rotating chuck (305) through a connector (304). The rotating chuck (305) and the clamping head (405) are concentrically mounted, and both have a positioning groove at their center that matches the end cap. An air inlet pipe is inserted through the center of the rotating chuck (305). The connector (304) is slidably mounted on the limiting slide rail to restrict the circumferential rotation of the nut (303).

10. The can body welding apparatus according to claim 9, characterized by: The driven clamping mechanism (300) also includes a protective cover, which is fixedly mounted on the frame (100).

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