Automatic welding equipment and method for capacitor

Abstract

The invention provides automatic capacitor welding equipment and method, and relates to the technical field of capacitor processing, the automatic capacitor welding equipment is used for welding a welding line on the surface of a capacitor bank, the automatic capacitor welding equipment comprises a working platform, a welding head for welding the capacitor bank and a traction device are mounted at the upper end of the working platform, and the automatic capacitor welding equipment further comprises a transfer device for conveying the capacitor bank; the welding device further comprises a containing device used for containing the capacitor bank, a first rotating platform used for locking and controlling the containing device and the capacitor bank to rotate is arranged below the welding head, and the traction device comprises a traction assembly. The traction assembly comprises a traction tail end used for pulling the welding line, a cutting tail end used for cutting the welding line and a second telescopic rod used for controlling the traction tail end and the cutting tail end to stretch out and draw back. According to the automatic welding device, the improvement amplitude of existing welding equipment is small, the cost is low, meanwhile, the welding effect is stable, the welding effect is good, continuous welding of multiple point positions can be completed within a short time, and the automatic welding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitor processing, and in particular to an automatic welding device and method for capacitors. Background Art

[0002] For small-scale capacitor welding workshops, the back of the electrolytic capacitor is usually welded and fixed manually. During the welding process, multiple capacitors need to be placed in a predetermined mold for positioning, and the welding wire is welded and fixed to the back of the capacitor by welding equipment to form a capacitor group.

[0003] The backs of multiple capacitors need to be welded multiple times. During the welding process, the staff manually controls the position between the capacitor group and the welding head, and realizes continuous welding of multiple capacitors in the process of the welding head descending and contacting. Some workshops can simulate the arm movements of operators through robots or other mechanical equipment to automatically and continuously weld the capacitor groups. However, the cost of robotic arms is relatively high, which increases the overall production cost of capacitor groups. In addition, the installation environment and use environment of some robotic arms have special requirements. Most traditional welding equipment is difficult to install suitable robotic arms, resulting in low welding efficiency of some robotic arms, or even the inability to complete automatic welding normally. Summary of the invention

[0004] In view of the above problems, the present invention provides an automatic welding device and method for capacitors. The invention has a small improvement on the existing welding equipment and is low in cost. At the same time, the welding effect is stable and good. Continuous welding of multiple points can be completed in a short time, thereby improving the efficiency of automatic welding.

[0005] To solve the above problems, the technical solution adopted by the present invention is: A capacitor automatic welding device is used to weld a welding wire to a surface of a capacitor group, comprising a working platform, a welding head and a traction device for welding the capacitor group are installed on the upper end of the working platform, a transfer device for conveying the capacitor group, and a accommodating device for accommodating the capacitor group. A first rotating platform is provided below the welding head to lock and control the rotation of the accommodating device and the capacitor group. The traction device comprises a traction assembly, the traction assembly comprises a traction end for traction of the welding wire, a cutting end for cutting the welding wire, and a second telescopic rod for controlling the extension and retraction of the traction end and the cutting end. The welding wire is first pulled to the surface of the capacitor group by the traction end to complete the welding fixation of the first point, and then the welding fixation of the remaining points is completed during the movement of the welding head and the rotation of the first rotating platform. Finally, the cutting of the welding wire is completed by the cutting end; the transfer device comprises a third telescopic rod and a locking end, and the locking end and the accommodating device have a locking state and a disengaged state. During the welding process, the locking end and the accommodating device are controlled to be in a disengaged state, and during the conveying process, the locking end and the accommodating device are controlled to be in a locking state.

[0006] Preferably, the traction device further comprises a guide assembly, the guide assembly is located on a side of the traction assembly away from the first rotating platform, the guide assembly comprises a guide ring for the welding line to pass through and a first telescopic rod for controlling the extension and retraction of the guide ring.

[0007] Preferably, a locking device is fixed to the outside of the accommodating device, the locking end comprises a locking ring adapted to the locking device, an annular locking bag is installed on the inner wall of the locking ring, and the annular locking bag has a contracted state and an expanded state.

[0008] Preferably, the locking device includes a locking protrusion, a pumping air channel for gas to pass through is formed inside the locking protrusion, a one-way valve for one-way entry of gas is installed in the pumping air channel, and also includes pumping air equipment, a connector connected to the pumping air equipment is installed on the inner side of the locking end, and the accommodating device includes a accommodating box body, and a plurality of locking air bags connected to the pumping air channel are arranged inside the accommodating box body.

[0009] Preferably, the one-way valve comprises an elastic element, a one-way sealing valve body 1 and a one-way sealing valve body 2. Under the action of the elastic element, the one-way sealing valve body 1 can fit with the surface of the one-way sealing valve body 2 to prevent gas from overflowing.

[0010] Preferably, a deflation ejector pin is also installed inside the third telescopic rod, and the one-way sealing valve body is located on the moving path of the deflation ejector pin.

[0011] Preferably, a magnetic control valve is installed at the lower end of the containing box body, and an electromagnet matched with the magnetic control valve is installed inside the first rotating platform.

[0012] A capacitor automatic welding method uses the above capacitor automatic welding equipment, including the following steps: S1, conveying a containing device filled with a capacitor group to one side of a first rotating platform through a transfer device, and locking and fixing the lower end of the containing device through the upper end of the first rotating platform, after the containing device is locked and fixed with the first rotating platform, controlling the locking ends of the containing device and the transfer device to be disengaged to complete the loading and conveying of the capacitor group; S2, first pulling the welding line to the surface of the capacitor group through the pulling end to complete the welding and fixing of the first point, then completing the welding and fixing of the remaining points during the movement of the welding head and the rotation of the first rotating platform, and finally completing the cutting of the welding line through the cutting end; S3, after the capacitor group is welded, first controlling the locking ends of the containing device and the transfer device to be locked, then controlling the containing device to be disengaged from the first rotating platform to complete the unloading and conveying of the capacitor group after welding.

[0013] The beneficial effects of the present invention are: Compared with the prior art, by controlling the capacitor group to rotate to different positions through the first rotating platform, there is no need to adjust the orientation of the welding line output, and continuous welding can be completed by simply controlling its up and down movement position to match the welding point of the capacitor group; the improvement on the existing welding equipment is small and the cost is low. At the same time, the welding effect is stable and good, and continuous welding of multiple points can be completed in a short time, thereby improving the efficiency of automated welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0015] Figure 2 For the present invention Figure 1 Schematic diagram of the main structure.

[0016] Figure 3 For the present invention Figure 1 Schematic diagram of the top view structure.

[0017] Figure 4 For the present invention Figure 1 Schematic diagram of the side structure.

[0018] Figure 5 For the present invention Figure 2 A is an enlarged structural diagram of FIG.

[0019] Figure 6 It is a schematic diagram of the first welding state of the welding line of the present invention.

[0020] Figure 7 It is a schematic diagram of the second welding state of the welding line of the present invention.

[0021] In the figure: 100, working platform; 200, loading and unloading platform; 300, transfer device; 310, second rotating platform; 320, third telescopic rod; 330, locking end; 331, locking ring; 332, annular locking bag; 333, deflation ejector; 400, first rotating platform; 500, traction device; 510, guide assembly; 511, first telescopic rod; 512, guide ring; 520, traction assembly; 521, second telescopic rod; 522, traction end; 523, cutting end; 600, welding line; 700, capacitor bank; 800, welding head; 900, accommodating device; 910, accommodating box; 920, magnetic control valve; 930, locking device; 931, locking protrusion; 932, elastic element; 933, one-way sealing valve body 1; 934, one-way sealing valve body 2; 940, locking airbag. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] In order to solve the above problems, refer to the attached Figure 1 -Attached Figure 7 A capacitor automatic welding device includes a conveying device transfer device 300 installed on the upper end of a working platform 100 for conveying a capacitor group 700, and also includes a welding auxiliary device traction device 500 for automatically welding the capacitor group 700. During the welding process of the capacitor group 700, the capacitor group 700 is first conveyed to one side of the traction device 500 through the transfer device 300, and a first rotating platform 400 that can be directional and rotated is also installed on one side of the traction device 500. The capacitor group 700 is placed on the surface of the first rotating platform 400 for locking and limiting, and then the capacitor group 700 is welded and fixed with the cooperation of the first rotating platform 400 and the traction device 500.

[0024] The welding fixation on the surface of the capacitor group 700 is to weld the welding wire 600 to the predetermined position on the surface of each capacitor on the surface of the capacitor group 700. The welding equipment here also includes a welding head 800. By moving the welding head 800 toward the capacitor group 700, the welding wire 600 can be welded and fixed to the capacitor on the surface of the capacitor group 700, and finally the entire capacitor group 700 is formed.

[0025] First of all, the welding method of the capacitor group 700 here is different from the method of simulating manual welding by traditional manipulators. During the welding process, the capacitor group 700 is driven to rotate around the axis by the first rotating platform 400. During the rotation process, the capacitor group 700 on the surface of the first rotating platform 400 and the welding head 800 can be controlled to be in different positions; the rotation of the capacitor group 700 is controlled by the first rotating platform 400, and the welding wire 600 can be welded to various positions on the surface of the capacitor group 700 to form an annular welding structure while the conveying direction of the welding wire 600 remains relatively unchanged, thereby completing the welding and fixation of multiple capacitors.

[0026] The traction device 500 here includes a guide component 510 and a traction component 520. The guide component 510 can guide the welding wire 600 to ensure its stability during the traction process. The traction component 520 can pull and cut the welding wire 600. The traction component 520 can pull the welding wire 600 to a predetermined position above the first rotating platform 400, opposite to the corresponding capacitor, and control the welding head 800 to move to a position directly above the capacitor. During the descent of the welding head 800, the welding wire 600 is welded and fixed to the surface of the capacitor to complete the welding of the first point.

[0027] Please refer to the attached Figure 6 , while controlling the welding head 800 to move to the right, the welding and fixing of the surface of the lower row of capacitors is completed; when the upper second row needs to be welded and fixed, the first rotating platform 400 is first controlled to rotate 90° clockwise, that is, rotated to the adjacent Figure 7 The welding head 800 is controlled to move to a predetermined position to complete the welding and fixing of the capacitor at the corner position; then, it is rotated 90° clockwise and the above action is repeated to complete the welding and fixing of the remaining capacitors, and finally the attached Figure 3 The right side shows the state where the capacitor bank 700 is welded and fixed as a whole.

[0028] Through the above-mentioned design, the capacitor group 700 is controlled to rotate to different positions through the first rotating platform 400, and there is no need to adjust the output orientation of the welding line 600. It only needs to control its up and down movement position to match the welding point of the capacitor group 700 to complete continuous welding; the improvement of the existing welding equipment is small and the cost is low. At the same time, the welding effect is stable and good, and continuous welding of multiple points can be completed in a short time, thereby improving the efficiency of automated welding.

[0029] Specifically, the guide assembly 510 here includes a first telescopic rod 511 and a guide ring 512. The guide ring 512 can allow the welding wire 600 to pass through stably. The linear movement of the guide ring 512 can be controlled by the first telescopic rod 511, and the welding wire 600 can be guided at different positions to ensure that the position of the welding wire 600 during the welding process can be adapted to the rotation position of the capacitor group 700, thereby avoiding local damage caused by excessive overall bending angle of the welding wire 600.

[0030] The traction assembly 520 here includes a traction end 522 for traction of the welding line 600, a cutting end 523 for cutting the welding line 600, and a second telescopic rod 521 for controlling the linear movement of the traction end 522 and the cutting end 523. The second telescopic rod 521 can control the traction end 522 and the cutting end 523 to move synchronously with the welding line 600, and can correspond to the inner guide assembly 510 to jointly guide the welding line 600.

[0031] Furthermore, the second telescopic rod 521 and the first telescopic rod 511 can be telescopically moved synchronously, and the telescopic position thereof is comprehensively determined according to the angle position of the deflection of the capacitor group 700 controlled by the first rotating platform 400 and the size of the capacitor.

[0032] The rear end of the second telescopic rod 521 also includes an electric slide rail for controlling the linear movement of the second telescopic rod 521. During the welding process, the end of the welding line 600 is first clamped and limited by the traction end 522, and then the linear movement of the second telescopic rod 521 is controlled by the electric slide rail to pull the welding line 600 to a predetermined position, and then the welding of the first point of the welding line 600 is completed by the welding head 800.

[0033] It should be noted that the traction end 522 here has the dual functions of clamping and pushing, and a double-roller clamping assembly can be selected to complete the clamping and pushing of the welding line 600; the end of the welding line 600 can be pushed forward a predetermined length, and the position of the end of the welding line 600 is controlled to exceed the cutting end 523, so as to avoid the cutting end 523 being welded to the outside during the welding process, affecting the overall movement of the traction assembly 520.

[0034] Multiple capacitor points are welded and fixed by the method described above. After the welding of the capacitor group 700 is completed, the traction component 520 is controlled to move to the position of the last welding point, and finally the welding line 600 is shortened by the cutting end 523 to complete the welding and fixing of one capacitor group 700. Then the above action process is repeated to complete the continuous welding and fixing of multiple capacitor groups 700.

[0035] The welding head 800 here can select a multi-joint manipulator for position control, or can select a three-directional control structure to coordinately and accurately control the position of the welding head 800.

[0036] Here, a plurality of capacitors are placed in the accommodating device 900 to form a capacitor group 700 , and the accommodating device 900 can be used to achieve stable positioning of the capacitor group 700 .

[0037] The transfer device 300 here includes a second rotating platform 310 that can be directional and rotated. A third telescopic rod 320 is also installed on the upper end of the second rotating platform 310. A locking end 330 is fixed to the telescopic end of the third telescopic rod 320. The accommodating device 900 here includes a accommodating box body 910. A locking device 930 adapted to the locking end 330 is installed on the outer side of the accommodating box body 910. During the limiting process, the locking end 330 is controlled by the third telescopic rod 320 to move toward the locking device 930. The locking end 330 is sleeved on the outer side of the locking device 930. The locking end 330 and the locking device 930 are locked. 0, the accommodating device 900 can be driven to deflect in a predetermined direction as a whole through the transfer device 300, so as to complete the transportation of the accommodating device 900 and the capacitor group 700; after the accommodating device 900 is transported to the surface of the first rotating platform 400, the accommodating device 900 and the first rotating platform 400 are locked and fixed. After the locking and fixing, the locking end 330 is disengaged from the locking device 930 and the locking end 330 is controlled to move in the opposite direction, and the locking end 330 is controlled to move to the initial safe position, so as to ensure that the capacitor group 700 and the accommodating device 900 can rotate normally and stably.

[0038] In order to ensure the stability of the locking between the locking end 330 and the locking device 930, the locking end 330 here includes a locking ring 331, and an annular locking bag 332 is installed on the inner side of the locking ring 331. The annular locking bag 332 is independently connected to an external pumping system. The annular locking bag 332 here has a contracted state and an expanded state. When the annular locking bag 332 is controlled to be in a contracted state, during the process of the locking end 330 moving toward the locking device 930, the two are in a non-contact state and can move freely with each other, thereby ensuring the stability of the overall position of the accommodating device 900; when the annular locking bag 332 is controlled to be in an expanded state, the annular locking bag 332 here can fit with the outer side of the locking device 930 to complete the locking and fixation of the locking device 930, thereby ensuring the stability of the accommodating device 900 as a whole during the deflection movement.

[0039] The inner side of the annular locking capsule 332 here can be filled with electrorheological fluid. After the annular locking capsule 332 expands, the electrorheological fluid can be controlled to be in a conductive state, and the annular locking capsule 332 can be controlled to be in a solid state, which can further enhance the locking effect between the locking end 330 and the locking device 930, and ensure the stability of the overall transportation of the capacitor group 700 and the containing device 900.

[0040] A plurality of locking airbags 940 are installed on the inner wall of the accommodating device 900 to limit the capacitor group 700. The locking airbags 940 here also have a contracted state and an expanded state. When the locking airbags 940 are in the expanded state, they can be pressed tightly against the surface of the capacitor group 700, thereby further improving the overall stability of the capacitor group 700 during transportation and welding.

[0041] The locking airbag 940 here is connected to an external air pumping device, which can adjust and control the overall expansion or contraction state of the locking airbag 940; in order to be able to separate the air pumping device from the containing device 900, the efficiency of the air pumping is improved, the volume and mass of the containing device 900 are reduced, and the rotation stability of the containing device 900 is improved; a channel is formed inside the locking device 930 here, and a one-way valve is also provided inside the locking device 930 to adjust the one-way entry of gas. The locking airbag 940 can be automatically closed after being inflated on the outside, and the locking airbag 940 is controlled to be in an expanded state continuously during the welding process. After the welding is completed, the gas in the locking airbag 940 is discharged to ensure stability during the welding process.

[0042] Specifically; the locking device 930 includes a locking protrusion 931, and a pump air channel for gas to pass through is formed inside the locking protrusion 931, and a one-way valve for one-way entry of gas is installed in the pump air channel. The one-way valve here can select an existing pump air structure. The one-way valve includes an elastic element 932, a one-way sealing valve body 1 933 and a one-way sealing valve body 2 934. Under the action of the elastic element 932, the one-way sealing valve body 1 933 can fit with the surface of the one-way sealing valve body 2 934 to prevent gas overflow.

[0043] A connector connected to the pumping equipment is installed on the inner side of the locking end 330. After the locking end 330 and the locking device 930 are connected, the gas generated by the pumping equipment can flow from the inside of the locking end 330 through the locking device 930 and finally enter the locking airbag 940 to control the expansion of the locking airbag 940 to achieve locking and fixation of the capacitor group 700.

[0044] In the process of controlling the deflation of the locking airbag 940, a retractable deflation pin 333 can be installed on the inner side of the locking end 330, and the deflation pin 333 can be controlled to extend into the inner side of the locking device 930 to push the one-way sealing valve body 933 toward the inside. At this time, the one-way valve can be controlled to be in a two-way air-guiding state. In this process, the gas inside the locking airbag 940 can be extracted, and the locking airbag 940 can be controlled to be in a contracted state, thereby canceling the locking limit of the capacitor group 700; repeating the above actions can complete the adaptive locking of different groups of capacitor groups 700.

[0045] Other methods can also be used to control the deflation of the locking airbag 940. A solenoid valve 920 connected to the locking airbag 940 can be installed at the lower end of the containing box body 910. The solenoid valve 920 here is magnetically controlled to open and close. An electromagnet is installed inside the first rotating platform 400. The electromagnet is controlled to be in a repulsive state, which can control the solenoid valve 920 to be in an open state. The locking airbag 940 here has shrinkage elasticity and can automatically discharge the gas inside; the electromagnet is controlled to be in an attractive state, which can attract and lock the solenoid valve 920 to prevent gas from being discharged, thereby ensuring the stability of the locking airbag 940 limit. At the same time, the state of the controlling electromagnet can also attract and fix the containing box body 910, thereby ensuring the stability of the overall limit of the containing device 900.

[0046] The locking device 930 and the locking end 330 here can be selected as two groups arranged symmetrically, which can fix the two sides of the accommodating device 900 to ensure the stability of the overall structure; further, the third telescopic rod 320 and the locking end 330 here can be symmetrically arranged into four groups, which can complete the preparation for loading the second group of accommodating devices 900 while loading the first group of accommodating devices 900, thereby shortening the intermediate time and improving the overall welding efficiency of the capacitor.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A capacitor automatic welding device, used for welding a welding wire (600) to the surface of a capacitor bank (700), comprising a working platform (100), a welding head (800) and a traction device (500) for welding the capacitor bank (700) being installed on the upper end of the working platform (100), and a transport device (300) for transporting the capacitor bank (700), characterized in that: It also includes a containing device (900) for containing the capacitor group (700), a first rotating platform (400) for locking and controlling the rotation of the containing device (900) and the capacitor group (700) is provided below the welding head (800), the traction device (500) includes a traction assembly (520), the traction assembly (520) includes a traction end (522) for traction of the welding wire (600), a cutting end (523) for cutting the welding wire (600), and a second telescopic rod (521) for controlling the extension and retraction of the traction end (522) and the cutting end (523), the welding wire (600) is firstly pulled to the surface of the capacitor group (700) by the traction end (522) to complete the welding fixation of the first point, then the welding fixation of the remaining points is completed during the movement of the welding head (800) and the rotation of the first rotating platform (400), and finally the cutting of the welding wire (600) is completed by the cutting end (523); The transfer device (300) comprises a third telescopic rod (320) and a locking end (330); the locking end (330) and the receiving device (900) are in a locked state and a disengaged state; during welding, the locking end (330) and the receiving device (900) are controlled to be in a disengaged state; during transportation, the locking end (330) and the receiving device (900) are controlled to be in a locked state.

2. The capacitor automatic welding equipment according to claim 1, characterized in that: The traction device (500) further comprises a guide assembly (510), the guide assembly (510) being located on a side of the traction assembly (520) away from the first rotating platform (400), the guide assembly (510) comprising a guide ring (512) for the welding line (600) to pass through, and a first telescopic rod (511) for controlling the extension and retraction of the guide ring (512).

3. The capacitor automatic welding equipment according to claim 1, characterized in that: A locking device (930) is fixed to the outside of the accommodating device (900), the locking end (330) comprises a locking ring (331) adapted to the locking device (930), an annular locking capsule (332) is installed on the inner wall of the locking ring (331), and the annular locking capsule (332) has a contracted state and an expanded state.

4. The capacitor automatic welding equipment according to claim 3, characterized in that: The locking device (930) includes a locking protrusion (931), a pumping air channel for gas to pass through is formed inside the locking protrusion (931), a one-way valve for one-way entry of gas is installed in the pumping air channel, and also includes a pumping air device. A joint connected to the pumping air device is installed on the inner side of the locking end (330). The accommodating device (900) includes a accommodating box body (910), and a plurality of locking air bags (940) connected to the pumping air channel are arranged inside the accommodating box body (910).

5. The capacitor automatic welding equipment according to claim 4, characterized in that: The one-way valve comprises an elastic element (932), a one-way sealing valve body (933) and a one-way sealing valve body (934). Under the action of the elastic element (932), the one-way sealing valve body (933) can fit the surface of the one-way sealing valve body (934) to prevent gas from overflowing.

6. The capacitor automatic welding equipment according to claim 5, characterized in that: A deflation ejector pin (333) is also installed inside the third telescopic rod (320), and the one-way sealing valve body (933) is located on the moving path of the deflation ejector pin (333).

7. The capacitor automatic welding equipment according to claim 4, characterized in that: A magnetic control valve (920) is installed at the lower end of the containing box body (910), and an electromagnet compatible with the magnetic control valve (920) is installed inside the first rotating platform (400).

8. A capacitor automatic welding method, characterized in that: The capacitor automatic welding equipment according to any one of claims 1 to 7 comprises the following steps: S1, conveying the containing device (900) loaded with the capacitor group (700) to one side of the first rotating platform (400) through the transfer device (300), and locking and fixing the lower end of the containing device (900) through the upper end of the first rotating platform (400), and after the containing device (900) and the first rotating platform (400) are locked and fixed, controlling the locking end (330) of the containing device (900) and the transfer device (300) to be separated, thereby completing the loading and conveying of the capacitor group (700); S2, firstly, the welding wire (600) is pulled to the surface of the capacitor bank (700) by the pulling end (522) to complete the welding fixation of the first point, then, the welding fixation of the remaining points is completed during the movement of the welding head (800) and the rotation of the first rotating platform (400), and finally, the welding wire (600) is cut by the cutting end (523); S3. After the capacitor group 700 is welded, the accommodating device (900) is first controlled to be locked with the locking end (330) of the transfer device (300), and then the accommodating device (900) is controlled to be separated from the first rotating platform (400), thereby completing the unloading and conveying of the capacitor group (700) after welding.

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