A metering transformer terminal welding device and use method

Abstract

The invention discloses a terminal welding device for a metering transformer and a method for using the device, comprising a welding platform, a U-shaped opening is provided on the top of the welding platform, a lifting block is slidably connected to the inner wall of the U-shaped opening, two mounting holes are provided on the side wall of the welding platform, and a profiled column is rotatably sleeved on the inner wall of the two mounting holes; a circular block is rotatably sleeved on the inner wall of the mounting groove, a cut plane is provided on the outer wall of the circular block, a first ratchet mechanism is installed on the first rotating shaft, a second ratchet mechanism is installed on the second rotating shaft, and a first driving mechanism is installed on the lifting block; two punching heads and two cutting knives arranged symmetrically are fixedly installed on the bottom of the profiled convex block; the inner wall insert of the arc groove has a first spot welding electrode, and the outer wall insert of the circular block has a second spot welding electrode. The invention solves the problem that the conventional terminal of the metering transformer is not firmly welded.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a terminal welding device for a metering transformer and a use method thereof. Background Art

[0002] In the field of power metering, metering transformers play a vital role, and the welding quality of their terminals directly affects the performance and reliability of the transformers. Traditional metering transformer terminal welding technology has many shortcomings.

[0003] In the past welding process, the metal terminal and the wire were simply flattened and welded, and the connection structure formed by this welding method was relatively simple. When the metering transformer is actually used, especially in some complex power environments or under the action of external mechanical forces, such as dragging and vibration during equipment installation and line maintenance, the welding part is easily loosened due to the lack of sufficient structural stability and resistance. Loose welding connections will cause poor contact and increase resistance, which will not only reduce the accuracy of measurement, but in severe cases may even cause signal interruption and circuit failure, affecting the normal operation of the entire power system.

[0004] As the power industry's requirements for metering accuracy and equipment stability continue to increase, a technology that can effectively enhance welding firmness is urgently needed. Therefore, we developed a metering transformer terminal welding device and a method of use to improve the firmness of metering transformer terminal welding and avoid loosening due to dragging in the later stage. Summary of the invention

[0005] In order to solve the problem that conventional metering transformer terminals are not firmly welded, the present invention aims to provide a metering transformer terminal welding device and a use method.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a metering transformer terminal welding device, comprising a welding table, a U-shaped opening is provided on the top of the welding table, a lifting block is slidably connected to the inner wall of the U-shaped opening, two symmetrically arranged corrugated grooves are provided at the bottom of the U-shaped opening, a corrugated protrusion slidably connected to the two inner side walls of the corrugated grooves is provided at the bottom of the lifting block, two mounting holes are provided on the side wall of the welding table, the mounting holes are connected to the two corrugated grooves, the inner walls of the two mounting holes are rotatably sleeved with corrugated columns, the outer wall of the corrugated column located at the two corrugated grooves is provided with two flat grooves, and the outer wall on the other side of the flat groove is provided with an arc groove; the side wall of the lifting block is provided with four symmetrically arranged mounting grooves with openings at the bottom; the inner wall of the mounting groove is rotatably sleeved with a circular block, and the outer wall of the circular block is provided with The plane is cut, and the circular block is located directly above the corrugated column. The center of one end of the corrugated column is fixedly connected with a first rotating shaft that rotates and penetrates the side wall of the welding table. The side wall at the center of the circular block is fixedly penetrated with a second rotating shaft. A first ratchet mechanism is installed on the first rotating shaft, and a second ratchet mechanism is installed on the second rotating shaft. A first driving mechanism is installed on the lifting block, and the lifting block is transmitted to the first ratchet mechanism and the first rotating shaft through the rising of the lifting block to realize the flipping of the flat groove and the arc groove on the corrugated column; a second driving mechanism is installed on the side wall of the welding table, and the second rotating shaft is synchronously driven to rotate through the rising of the lifting block and the second rotating shaft to realize the flipping of the circular block; two symmetrically arranged punching heads and two cutting knives are fixedly installed on the bottom of the corrugated protrusion; the inner wall insert of the arc groove has a first spot welding electrode, and the outer wall insert of the circular block has a second spot welding electrode.

[0007] Preferably, a boss is fixedly arranged at the bottom of one side wall of the embossing groove, and a cutting edge is provided on the top surface of the boss for cooperating with the cutting knife to perform a cutting operation; a punching edge is also provided on the top surface of the boss for cooperating with the punching head to perform a punching operation; a blanking groove is provided on the side wall of the welding table, and the punching edge is connected to the blanking groove.

[0008] Preferably, two U-shaped grooves are provided on the top surface of one side of the welding table, and the second rotating shaft moves through the U-shaped grooves; the second rotating shaft is set in two, and the outer walls of the two second rotating shafts are fixedly sleeved with two mutually meshing first gears; the first rotating shaft is set in two, and the outer walls of the two first rotating shafts are fixedly sleeved with two mutually meshing second gears.

[0009] Preferably, the top surface of the welding table is fixedly connected to a U-shaped support table, the top surface of the U-shaped support table is fixedly installed with a first cylinder, and the telescopic end at the bottom of the first cylinder is fixedly connected to the top surface of the lifting block.

[0010] Preferably, a feeding mechanism is installed on the side wall of the welding table close to the punching head, and the feeding mechanism includes a rectangular plate fixedly connected to the side wall of the welding table, and the side wall of the rectangular plate is rotatably connected to two rubber rollers arranged up and down through a pin shaft, one end of the two rubber rollers are axially connected to two third gears that mesh with each other, and the side wall of the rectangular plate is fixedly installed with a first motor axially connected to one end of one of the rubber rollers.

[0011] Preferably, a transformer support platform is movably provided on the side of the welding platform away from the punching head, and a second cylinder is fixedly connected to the side wall of the welding platform, and the top of the telescopic end of the second cylinder is fixedly connected to the bottom of the transformer support platform.

[0012] Preferably, the first ratchet mechanism includes a first fixed block fixedly mounted on the side wall of the welding table, the bottom of the first fixed block is fixedly connected to the first guide rod, the bottom of the first guide rod is fixedly connected to the first fixed plate, the outer wall of the first guide rod is slidably connected with the first L-shaped plate, the outer wall of the first guide rod is sleeved with a first spring pressed against the top surface of the first L-shaped plate, the bottom of the first L-shaped plate is provided with a first pawl, the outer wall of the first rotating shaft is fixedly sleeved with the first ratchet gear, and the first pawl is meshed with the first ratchet gear;

[0013] The first driving mechanism includes a first L-shaped bracket fixedly installed on the side wall of the lifting block, the side wall of the first L-shaped bracket close to the bottom is fixedly connected to a first connecting shaft, the outer wall of the first connecting shaft is rotatably connected with a first ratchet bar, the first ratchet bar is meshed with the first ratchet gear, the outer wall of the first connecting shaft is sleeved with a first torsion spring, the two ends of the first torsion spring are respectively fixedly connected to the side wall of the first ratchet bar and the outer wall of the first connecting shaft, and the first ratchet bar is pressed against the first ratchet gear through the torsion of the first torsion spring.

[0014] Preferably, the second ratchet mechanism includes a second L-shaped bracket fixedly mounted on the side wall of the lifting block, the second L-shaped bracket is fixedly connected to the second guide rod at the bottom, the second guide rod is fixedly connected to the second fixing plate at the bottom, the second guide rod is slidably connected to the second L-shaped plate on the outer wall, the second guide rod is sleeved with a second spring that is tightly pressed against the top surface of the second L-shaped plate on the outer wall, a second pawl is arranged at the bottom of the second L-shaped plate, the outer wall of the second rotating shaft is fixedly sleeved with a second ratchet gear, and the second pawl is meshed with the second ratchet gear;

[0015] The second driving mechanism includes a second fixed block fixedly mounted on the side wall of the welding table, the side wall of the second fixed block is fixedly connected to the second connecting shaft, the outer wall of the second connecting shaft is rotatably penetrated by a second ratchet bar, the second ratchet bar is meshed with the second ratchet gear, the outer wall of the second connecting shaft is sleeved with a second torsion spring, the two ends of the second torsion spring are respectively fixedly connected to the side wall of the second ratchet bar and the outer wall of the second connecting shaft, and the second ratchet bar is pressed against the second ratchet gear through the torsion force of the second torsion spring.

[0016] A method for using a metering transformer terminal welding device comprises the following steps:

[0017] S1, from the side of the welding table away from the punching head, place the wires at both ends of the metering transformer coil in the two pressing grooves, the lifting block descends, and the bottom of the pressing convex block and the cutting surface jointly press the wires of the coil into a flat shape;

[0018] S2, lift the lifting block, and transmit the lifting block to the first ratchet mechanism and the first rotating shaft through the lifting block, so that the arc groove on the profiled column is turned upward; at the same time, the lifting block and the second rotating shaft are raised, and the second rotating shaft is synchronously driven to rotate, so that the arc surface of the circular block is turned downward;

[0019] S3, inserting two metal strips into two press-forming grooves from one side of the punching head, placing the metal strips above the flat wire, the lifting block descends, the punching head punches the metal strips, and the cutting knife cuts the metal strips; at the same time, the circular block presses the metal strips and the flat wires together in the arc groove, and the metal strips and the flat wires are concave;

[0020] S4, the first spot welding electrode and the second spot welding electrode are energized instantaneously, and when the current passes through the metal strip and the flat wire at the concave part, the metal strip and the flat wire at the concave part melt at high temperature, and solidify and fuse after a while;

[0021] S5, lift the lifting block, and transmit the lifting block to the first ratchet mechanism and the first rotating shaft through the lifting block to flip the flat groove on the corrugated column to the upper side; at the same time, through the lifting block and the second rotating shaft rising, the second rotating shaft is synchronously driven to rotate, and the cut surface of the circular block is flipped to the lower side to prepare for the welding work of the next metering transformer terminal.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention improves the design of the concave post-fusion process, so that the metal strip and the flat wire form a unique concave structure at the welding point. This structure significantly increases the contact area between the two at the microscopic level, and constructs a more complex and stable connection interface, thereby effectively increasing the resistance in the connection process; this increase in resistance can not only better resist external force interference in the early stage of welding, ensure the accuracy and stability of the welding process, but also significantly improve the firmness of welding during long-term use; whether it is a slight vibration under normal operating conditions, or encountering a large drag force under extreme conditions, this structure can effectively disperse stress and avoid stress concentration in a weak position, thereby effectively avoiding loosening caused by various drag factors in the later stage, and fundamentally greatly improving the reliability and stability of the welding of the metering transformer terminals.

[0024] 2. The present invention uses a linkage mechanism of the lifting block. The rise of the lifting block synchronously drives the first ratchet mechanism and the second ratchet mechanism to control the flipping of the corrugated column and the circular block, which can easily switch between different processing steps. At the same time, the lifting block avoids the flipping of the corrugated column and the circular block during the descent process.

[0025] 3. The present invention realizes the integrated processing of punching, cutting and welding of terminals, and the connection between each process is tight and seamless, which greatly shortens the entire production cycle and significantly improves the production efficiency. At the same time, it effectively reduces the processing errors that may be introduced due to multiple clamping and transfer, and comprehensively improves the quality stability and reliability of the product, so that the production of metering transformer terminals can be carried out in a more efficient, more accurate and more stable manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0027] Figure 1 It is a schematic diagram of the overall structure of one side of the mutual inductor support platform of the present invention;

[0028] Figure 2 It is a schematic diagram of the overall structure of one side of the feeding mechanism of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the welding station of the present invention;

[0030] Figure 4 For the present invention Figure 3 Schematic diagram of the structure of part A;

[0031] Figure 5 It is a structural schematic diagram of the installation of the circular block and the lifting block of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the lifting block of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the profiled column of the present invention;

[0034] Figure 8 It is a structural schematic diagram of a circular block of the present invention;

[0035] Fig. 9 It is a structural schematic diagram of a first ratchet machine of the present invention;

[0036] Fig.10 It is a schematic structural diagram of the second ratchet mechanism of the present invention.

[0037] In the figure: 1, welding table; 2, lifting block; 3, press column; 4, circular block; 5, first rotating shaft; 6, second rotating shaft; 7, first ratchet mechanism; 8, second ratchet mechanism; 9, first driving mechanism; 10, second driving mechanism; 11, punching head; 12, cutting knife; 13, first spot welding electrode; 14, second spot welding electrode; 15, first gear; 16, second gear; 17, feeding mechanism; 18, mutual inductor support platform; 101, U-shaped opening; 102, press groove; 103, mounting hole; 201, press convex block; 202, mounting groove; 301, flat groove; 302, arc groove; 401, cut plane; 104, boss; 105, cutting edge; 106, punching edge; 107, blanking groove; 108, U-shaped groove; 203, U-shaped support platform; 204, first gas cylinder; 1701, rectangular plate; 1702, rubber roller; 1703, third gear; 1704, first motor; 1801, second cylinder; 701, first fixed block; 702, first guide rod; 703, first fixed plate; 704, first L-shaped plate; 705, first spring; 706, first pawl; 707, first ratchet gear; 901, first L-shaped bracket; 902, first connecting shaft; 903, first ratchet bar; 904, first torsion spring; 801, second L-shaped bracket; 802, second guide rod; 803, second fixed plate; 804, second L-shaped plate; 805, second spring; 806, second pawl; 807, second ratchet gear; 1001, second fixed block; 1002, second connecting shaft; 1003, second ratchet bar; 1004, second torsion spring. DETAILED DESCRIPTION

[0038] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0039] See also Figures 1 to 10 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0040] The present invention provides a technical solution: a metering transformer terminal welding device, which is mainly composed of a welding table 1, a lifting block 2, a profiled column 3, a circular block 4, a first rotating shaft 5, a second rotating shaft 6, a first ratchet mechanism 7, a second ratchet mechanism 8, a first driving mechanism 9, a second driving mechanism 10 and other components. The working process and the coordinated effect of each component are described in detail below.

[0041] First, the welding table 1 serves as the basic platform of the entire device, and the U-shaped opening 101 opened on the top thereof provides a sliding space for the lifting block 2, so that the lifting block 2 can move stably in the vertical direction. The profiling groove 102 at the bottom of the U-shaped opening 101 and the profiling protrusion 201 at the bottom of the lifting block 2 cooperate with each other to perform preliminary profiling operations on the conductors of the metering transformer coil. A boss 104 is provided at the bottom of the profiling groove 102 near one side wall, and the cutting blade 105 and the punching blade 106 on the top surface of the boss 104 cooperate with the cutting knife 12 and the punching head 11 at the bottom of the profiling protrusion 201, respectively. When the punching operation is performed, the punching head 11 cooperates with the punching blade 106 to punch the metal strip, and the waste generated can be discharged through the punching blade 106 and the blanking trough 107 opened on the side wall of the welding table 1.

[0042] The corrugated column 3 is rotatably sleeved on the welding table 1 through the mounting hole 103, and its outer wall located at the corrugated groove 102 is provided with a flat groove 301 and an arc groove 302, and the flat groove 301 and the arc groove 302 are arranged oppositely. The different shape designs of the flat groove 301 and the arc groove 302 can meet different processing requirements. For example, the arc groove 302 can provide a suitable shape match in the subsequent compression and welding process of the metal strip and the flat wire, and the first spot welding electrode 13 of the inner wall insert of the arc groove 302 plays a key role in welding. The first rotating shaft 5 fixedly connected at the center of one end of the corrugated column 3, and the first ratchet mechanism 7 and the first driving mechanism 9 installed on the first rotating shaft 5 jointly control the flipping action of the corrugated column 3.

[0043] Specifically, the first ratchet mechanism 7 includes a first fixed block 701, a first guide rod 702, a first fixed plate 703, a first L-shaped plate 704, a first spring 705, a first pawl 706 and a first ratchet gear 707. The first fixed block 701 is fixed to the side wall of the welding table 1, the first guide rod 702 connects the first fixed block 701 and the first fixed plate 703, the first L-shaped plate 704 can slide on the first guide rod 702, and the first spring 705 provides elastic force to keep the first pawl 706 at the bottom of the first L-shaped plate 704 in meshing state with the first ratchet gear 707, thereby realizing the braking function. The first driving mechanism 9 is composed of a first L-shaped bracket 901, a first connecting shaft 902, a first ratchet bar 903 and a first torsion spring 904. The first L-shaped bracket 901 is fixed on the side wall of the lifting block 2, and the first ratchet bar 903 that rotates and penetrates the first connecting shaft 902 is meshed with the first ratchet gear 707, and the first torsion spring 904 presses the first ratchet bar 903 against the first ratchet gear 707. During the descent of the lifting block 2, the first pawl 706 brakes the first ratchet gear 707, and the first ratchet bar 903 rotates on the first connecting shaft 902 without driving the first ratchet gear 707; when the lifting block 2 rises, the first ratchet bar 903 moves upward, and its teeth push the first ratchet gear 707 upward, driving the first rotating shaft 5 to rotate, thereby realizing the flipping of the flat groove 301 and the arc groove 302 on the profiled column 3.

[0044] The circular block 4 is rotatably sleeved in the mounting groove 202, and the beveled surface 401 of its outer wall and the second spot welding electrode 14 of the insert play a role in different processing steps. The second rotating shaft 6 fixedly connected to the side wall at the center of the circular block 4, and the second ratchet mechanism 8 and the second driving mechanism 10 associated therewith control the flipping of the circular block 4. The second ratchet mechanism 8 is similar to the first ratchet mechanism 7, and includes a second L-shaped bracket 801, a second guide rod 802, a second fixed plate 803, a second L-shaped plate 804, a second spring 805, a second pawl 806 and a second ratchet gear 807. The second driving mechanism 10 is composed of a second fixed block 1001, a second connecting shaft 1002, a second ratchet bar 1003 and a second torsion spring 1004. When the lifting block 2 descends, the second pawl 806 brakes the second ratchet gear 807, and the second ratchet bar 1003 rotates on the second connecting shaft 1002 without driving the second ratchet gear 807; when the lifting block 2 rises, the second ratchet gear 807 rises through the rise of the lifting block 2 and the second rotating shaft 6, and the second ratchet bar 1003 pushes the second ratchet gear 807 downward to rotate the second rotating shaft 6, thereby realizing the flipping of the circular block 4.

[0045] The U-shaped groove 108 on the top surface of one side of the welding table 1 provides space for the movement of the second rotating shaft 6, and the mutually meshing first gears 15 fixedly sleeved on the outer walls of the two second rotating shafts 6 and the mutually meshing second gears 16 fixedly sleeved on the outer walls of the two first rotating shafts 5 ensure the synchronous movement of related components during the driving process, making the operation of the device more stable and reliable.

[0046] The first cylinder 204 installed on the U-shaped support platform 203 fixedly connected to the top surface of the welding table 1 is the power source for the up and down movement of the lifting block 2. The bottom telescopic end of the first cylinder 204 is fixedly connected to the top surface of the lifting block 2. Through the telescopic action of the first cylinder 204, the lifting and lowering of the lifting block 2 is precisely controlled, thereby driving a series of related components to work together.

[0047] In terms of feeding, the feeding mechanism 17 installed on the side wall of the welding table 1 close to the punching head 11 plays an important role. The feeding mechanism 17 is composed of a rectangular plate 1701, a rubber roller 1702, a third gear 1703 and a first motor 1704. The rectangular plate 1701 is fixed to the side wall of the welding table 1, and the two rubber rollers 1702 arranged above and below are rotatably connected to the rectangular plate 1701 through a pin shaft, and the two third gears 1703 that are axially connected at one end and mesh with each other ensure the synchronous rotation of the two rubber rollers 1702. The first motor 1704 drives one of the rubber rollers 1702 to rotate, thereby realizing the stable transportation of the metal strip. The flat metal strip is inserted between the two rubber rollers 1702, so that the metal strip can be smoothly fed into the profiling groove 102, providing raw materials for the subsequent punching, cutting and welding processes.

[0048] For the support of the transformer, the transformer support platform 18 movably arranged on the side of the welding table 1 away from the punching head 11 and the second cylinder 1801 connected thereto play a key role. The top of the telescopic end of the second cylinder 1801 is fixedly connected to the bottom of the transformer support platform 18. Through the action of the second cylinder 1801, the height position of the transformer support platform 18 can be adjusted, so that the metering transformer coil can be placed in a suitable position for terminal welding. In actual operation, the metering transformer coil is first placed on the transformer support platform 18, and it can be fixed by a clamp, and the wires at both ends of the metering transformer coil are placed in two press-forming grooves 102. At this time, the first cylinder 204 drives the lifting block 2 to descend, and the bottom of the press-forming protrusion 201 and the bevel surface 401 jointly press the wires of the coil into a flat shape. Then, according to the above-mentioned action flow of the lifting block 2 when it rises, the corrugated column 3 and the circular block 4 are turned over, the metal strip is inserted into the rubber roller 1702 and sent into the corrugated groove 102, and the lifting block 2 is lowered again to punch and cut to obtain the metal terminal, and the circular block 4 presses the metal strip and the flat wire together in the arc groove 302. At this time, the first spot welding electrode 13 and the second spot welding electrode 14 are instantly energized to complete the welding of the metal strip and the flat wire. Finally, the lifting block 2 is lifted again to achieve the reset of the corrugated column 3 and the flat groove 301 as well as the circular block 4 and the cut surface 401, and prepare for the welding of the next metering transformer terminal. The whole process completes the welding process of the metering transformer terminal efficiently and stably through the precise coordination of various components, improves production efficiency and product quality, and the device has a compact structure and is easy to operate, with good practicality and promotion value.

[0049] A method for using a metering transformer terminal welding device comprises the following steps:

[0050] S1, keep the cut surface 401 facing downward, the flat groove 301 facing upward, the bottom of the cut surface 401 is flush with the bottom of the pressed protrusion 201, and the flat groove 301 is flush with the bottom of the pressed groove 102;

[0051] The metering transformer coil is placed on the transformer support platform 18, and the metering transformer coil can be fixed by a clamp, and the wires at both ends of the metering transformer coil are placed in the two pressing grooves 102, and the first cylinder 204 drives the lifting block 2 to descend, and the bottom of the pressing protrusion 201 and the cutting surface 401 together press the wire of the coil into a flat shape;

[0052] During the descent of the lifting block 2, the first pawl 706 brakes the first ratchet gear 707, and at the same time the first ratchet bar 903 rotates on the first connecting shaft 902, so that the first driving mechanism 9 can follow the descent of the lifting block 2 without driving the first ratchet gear 707 to rotate;

[0053] During the descent of the lifting block 2, the second pawl 806 brakes the second ratchet gear 807, and at the same time, the second ratchet bar 1003 rotates on the second connecting shaft 1002, so that during the descent of the second ratchet mechanism 8, the second ratchet bar 1003 does not drive the second ratchet gear 807 to rotate;

[0054] S2, the first cylinder 204 lifts the lifting block 2, and the lifting block 2 lifts the first driving mechanism 9 upward, so that the first ratchet bar 903 moves upward, and the teeth of the first ratchet bar 903 push the first ratchet gear 707 upward, so that the first ratchet gear 707 rotates, and the first ratchet gear 707 drives the first rotating shaft 5 to rotate, thereby flipping the arc groove 302 on the profiled column 3 to the upper side;

[0055] At the same time, the lifting block 2 and the second rotating shaft 6 are lifted, driving the second ratchet gear 807 to lift, and the second ratchet bar 1003 pushes the second ratchet gear 807 downward, the second ratchet gear 807 rotates, and the second ratchet gear 807 drives the second rotating shaft 6 to rotate, thereby flipping the arc surface of the circular block 4 downward;

[0056] S3, insert two flat metal strips between two rubber rollers 1702, the first motor 1704 drives a rubber roller 1702 to rotate, under the action of two third gears 1703 meshing with each other, the two rubber rollers 1702 rotate, insert the two flat metal strips into the two corrugated grooves 102, the metal strips are placed above the flat wire, the lifting block 2 descends, the punching head 11 cooperates with the punching blade 106 to punch the metal strip, the hole is the hole for the metal terminal to install the bolt and the wire, the cutting knife 12 cooperates with the cutting blade 105 to cut the metal strip to obtain the metal terminal; at the same time, the circular block 4 presses the metal strip and the flat wire together in the arc groove 302, and the metal strip and the flat wire are concave;

[0057] S4, the first spot welding electrode 13 and the second spot welding electrode 14 are energized instantaneously, and when the current passes through the metal strip and the flat wire at the concave part, the metal strip and the flat wire at the concave part melt at high temperature, and solidify and fuse after a while;

[0058] The metal strip and the flat wire are pressed together in the arc groove 302 by the circular block 4, so that the metal strip and the flat wire are concave. This welding method after the concave significantly increases the contact area and the complexity of the connection structure, forming an effect similar to mechanical interlocking, greatly increasing the connection resistance; when subjected to the subsequent drag force, this structure can effectively disperse the stress and avoid stress concentration at a certain weak point, thereby firmly connecting the metal terminal and the wire together, significantly improving the welding firmness, effectively reducing the scrap rate caused by poor welding, and ensuring the stability and reliability of the product during long-term use;

[0059] S5, lift the lifting block 2, and transmit the lifting block 2 to the first ratchet mechanism 7 and the first rotating shaft 5 through the rising of the lifting block 2, so as to flip the flat groove 301 on the corrugated column 3 to the upper side; at the same time, through the rising of the lifting block 2 and the second rotating shaft 6, the second rotating shaft 6 is synchronously driven to rotate, and the cut surface 401 of the circular block 4 is flipped to the lower side to prepare for the welding work of the next metering transformer terminal.

[0060] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A terminal welding device for a metering transformer, comprising a welding table (1), characterized in that: The top of the welding platform (1) is provided with a U-shaped opening (101), the inner wall of the U-shaped opening (101) is slidably connected to a lifting block (2), the bottom of the U-shaped opening (101) is provided with two symmetrically arranged press-formed grooves (102), the bottom of the lifting block (2) is provided with a press-formed protrusion (201) which is slidably connected to the two inner side walls of the press-formed groove (102), and the side wall of the welding platform (1) is provided with two mounting holes (103), the mounting holes (103) are connected to the two press-formed grooves (102), and the two mounting holes (103) are connected to the two press-formed grooves (102). ) is rotatably sleeved with a profiled column (3), the outer wall of the profiled column (3) located at the two profiled grooves (102) is provided with two flat grooves (301), and the outer wall on the other side of the flat groove (301) is provided with an arc groove (302); the side wall of the lifting block (2) is provided with four symmetrically arranged installation grooves (202) with an opening at the bottom; the inner wall of the installation groove (202) is rotatably sleeved with a circular block (4), the outer wall of the circular block (4) is provided with a cut surface (401), and the circular block (4) is located at the profiled column ( 3), a first rotating shaft (5) rotatably connected to the side wall of the welding platform (1) is fixedly connected at the center of one end of the profiled column (3), a second rotating shaft (6) is fixedly connected to the side wall at the center of the circular block (4), a first ratchet mechanism (7) is installed on the first rotating shaft (5), a second ratchet mechanism (8) is installed on the second rotating shaft (6), and a first driving mechanism (9) is installed on the lifting block (2), and the lifting block (2) is driven by the first ratchet mechanism (7) and the first rotating shaft (5) to realize the leveling of the profiled column (3). The opening groove (301) and the arc groove (302) are flipped; the side wall of the welding table (1) is installed with a second driving mechanism (10), and the second rotating shaft (6) is synchronously driven to rotate by the lifting block (2) and the second rotating shaft (6) to realize the flipping of the circular block (4); two symmetrically arranged punching heads (11) and two cutting knives (12) are fixedly installed on the bottom of the pressed protrusion (201); the inner wall insert of the arc groove (302) has a first spot welding electrode (13), and the outer wall insert of the circular block (4) has a second spot welding electrode (14).

2. A metering transformer terminal welding device according to claim 1, characterized in that: A boss (104) is fixedly provided at the bottom of the profiling groove (102) near one side wall, and a cutting edge (105) is provided on the top surface of the boss (104) for cooperating with the cutting knife (12) to perform a cutting operation; a punching edge (106) is also provided on the top surface of the boss (104) for cooperating with the punching head (11) to perform a punching operation; a blanking groove (107) is provided on the side wall of the welding table (1), and the punching edge (106) is connected to the blanking groove (107).

3. A metering transformer terminal welding device according to claim 1, characterized in that: The top surface of one side of the welding table (1) is provided with two U-shaped grooves (108), and the second rotating shaft (6) movably passes through the U-shaped grooves (108); the second rotating shaft (6) is provided in two pieces, and the outer walls of the two second rotating shafts (6) are fixedly sleeved with two mutually meshing first gears (15); the first rotating shaft (5) is provided in two pieces, and the outer walls of the two first rotating shafts (5) are fixedly sleeved with two mutually meshing second gears (16).

4. A metering transformer terminal welding device according to claim 1, characterized in that: The top surface of the welding platform (1) is fixedly connected to a U-shaped support platform (203), the top surface of the U-shaped support platform (203) is fixedly mounted with a first cylinder (204), and the telescopic end at the bottom of the first cylinder (204) is fixedly connected to the top surface of the lifting block (2).

5. A metering transformer terminal welding device according to claim 1, characterized in that: A feeding mechanism (17) is installed on the side wall of the welding platform (1) close to the punching head (11), and the feeding mechanism (17) comprises a rectangular plate (1701) fixedly connected to the side wall of the welding platform (1), the side wall of the rectangular plate (1701) being rotatably connected to two rubber rollers (1702) arranged up and down via a pin shaft, one end of the two rubber rollers (1702) being axially connected to two third gears (1703) meshing with each other, and a first motor (1704) being axially connected to one end of one of the rubber rollers (1702) is fixedly installed on the side wall of the rectangular plate (1701).

6. A metering transformer terminal welding device according to claim 1, characterized in that: A transformer support platform (18) is movably provided on the side of the welding platform (1) away from the punching head (11), and a second cylinder (1801) is fixedly connected to the side wall of the welding platform (1), and the top of the telescopic end of the second cylinder (1801) is fixedly connected to the bottom of the transformer support platform (18).

7. A metering transformer terminal welding device according to claim 1, characterized in that: The first ratchet mechanism (7) comprises a first fixed block (701) fixedly mounted on a side wall of the welding platform (1); the first fixed block (701) is fixedly connected to a first guide rod (702) at the bottom; the first guide rod (702) is fixedly connected to a first fixed plate (703) at the bottom; a first L-shaped plate (704) is slidably inserted through the outer wall of the first guide rod (702); a first spring (705) is sleeved on the outer wall of the first guide rod (702) and pressed against the top surface of the first L-shaped plate (704); a first pawl (706) is arranged at the bottom of the first L-shaped plate (704); a first ratchet gear (707) is fixedly sleeved on the outer wall of the first rotating shaft (5); and the first pawl (706) meshes with the first ratchet gear (707); The first driving mechanism (9) comprises a first L-shaped bracket (901) fixedly mounted on the side wall of the lifting block (2); the side wall of the first L-shaped bracket (901) close to the bottom is fixedly connected to a first connecting shaft (902); a first ratchet bar (903) is rotatably connected to the outer wall of the first connecting shaft (902); the first ratchet bar (903) is meshed with a first ratchet gear (707); a first torsion spring (904) is sleeved on the outer wall of the first connecting shaft (902); two ends of the first torsion spring (904) are respectively fixedly connected to the side wall of the first ratchet bar (903) and the outer wall of the first connecting shaft (902); the first ratchet bar (903) is pressed against the first ratchet gear (707) by the torsion of the first torsion spring (904).

8. A metering transformer terminal welding device according to claim 1, characterized in that: The second ratchet mechanism (8) comprises a second L-shaped bracket (801) fixedly mounted on the side wall of the lifting block (2); the second L-shaped bracket (801) is fixedly connected to a second guide rod (802) at the bottom; the second guide rod (802) is fixedly connected to a second fixing plate (803) at the bottom; a second L-shaped plate (804) is slidably connected to the outer wall of the second guide rod (802); a second spring (805) is sleeved on the outer wall of the second guide rod (802) and pressed against the top surface of the second L-shaped plate (804); a second pawl (806) is arranged at the bottom of the second L-shaped plate (804); a second ratchet gear (807) is fixedly sleeved on the outer wall of the second rotating shaft (6); and the second pawl (806) is meshed with the second ratchet gear (807); The second driving mechanism (10) comprises a second fixed block (1001) fixedly mounted on the side wall of the welding table (1); the side wall of the second fixed block (1001) is fixedly connected to a second connecting shaft (1002); the outer wall of the second connecting shaft (1002) is rotatably connected with a second ratchet bar (1003); the second ratchet bar (1003) is meshed with a second ratchet gear (807); the outer wall of the second connecting shaft (1002) is sleeved with a second torsion spring (1004); the two ends of the second torsion spring (1004) are respectively fixedly connected to the side wall of the second ratchet bar (1003) and the outer wall of the second connecting shaft (1002); the second ratchet bar (1003) is pressed against the second ratchet gear (807) by the torsion of the second torsion spring (1004).

9. A method for using a metering transformer terminal welding device, characterized in that: A metering transformer terminal welding device according to any one of claims 1 to 8 comprises the following steps: S1, from the side of the welding table (1) away from the punching head (11), the wires at both ends of the metering transformer coil are placed in two pressing grooves (102), the lifting block (2) descends, and the bottom of the pressing protrusion (201) and the cut surface (401) jointly press the wires of the coil into a flat shape; S2, lift the lifting block (2), and transmit the lifting block (2) to the first ratchet mechanism (7) and the first rotating shaft (5) to flip the arc groove (302) on the profiled column (3) upward; at the same time, through the lifting block (2) and the second rotating shaft (6) rising, the second rotating shaft (6) is synchronously driven to rotate, and the arc surface of the circular block (4) is flipped downward; S3, inserting two metal strips from one side of the punching head (11) into the two pressing grooves (102), placing the metal strips above the flat wire, the lifting block (2) descends, the punching head (11) punches the metal strips, and the cutting knife (12) cuts the metal strips; at the same time, the circular block (4) presses the metal strips and the flat wires together in the arc groove (302), and the metal strips and the flat wires are concave; S4, the first spot welding electrode (13) and the second spot welding electrode (14) are energized instantaneously, and when the current passes through the metal strip and the flat wire at the concave part, the metal strip and the flat wire at the concave part melt at high temperature, and solidify and fuse after a while; S5, lift the lifting block (2), and transmit the lifting block (2) to the first ratchet mechanism (7) and the first rotating shaft (5), so that the flat groove (301) on the profiled column (3) is turned upward; at the same time, the lifting block (2) and the second rotating shaft (6) are raised, and the second rotating shaft (6) is synchronously driven to rotate, so that the cut surface (401) of the circular block (4) is turned downward, so as to prepare for the welding work of the next metering transformer terminal.

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