Spot welding positioning and pressing structure, spot welding equipment and spot welding method thereof

Abstract

The present invention discloses a spot welding positioning and pressing structure, a spot welding device and a spot welding method thereof. The spot welding positioning and pressing structure is used in the spot welding process of special-shaped steel wires and folded workpieces. The structure includes: at least one first end pressing mechanism, at least one middle end pressing mechanism, at least one second end pressing mechanism, at least one folded workpiece pressing mechanism and at least one spot welding pressing mechanism; the device includes at least one of the above-mentioned spot welding positioning and pressing structures; the method is applicable to the above-mentioned spot welding device; the present invention realizes automated operation, reduces the dependence on manual labor, and reduces the labor cost. At the same time, the automated equipment can operate continuously for 24 hours, further improving the production efficiency and reducing the production cost per unit product. Due to the improvement of welding accuracy and quality, the qualified rate of products is also correspondingly improved. The product scrapping and rework caused by welding defects are reduced, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of spot welding, and particularly to a spot welding positioning and pressing structure, a spot welding device and a spot welding method thereof. Background Art

[0002] In the booming field of automotive seat manufacturing today, a common automotive seat structure is composed of key components such as a seat frame, a foam strip, and an outer covering mask working together. As the core support structure of the entire seat, the seat frame is of self-evident importance. It is mainly composed of an outer frame and a wire frame carefully placed inside the outer frame. The construction of the wire frame is extremely ingenious, being formed by intertwining multiple longitudinal wires and multiple transverse wires through a specific process. These longitudinal wires and transverse wires are closely arranged in a crisscross manner according to precisely calculated spacing and angles. In the production workshop, workers carefully position and interweave each wire, and finally form an extremely regular and orderly mesh structure.

[0003] Digging deeper into the processing of the seat frame under the existing technical system, the shortcomings are fully exposed. In the initial stage of seat frame processing, the commonly used method is to use specially designed tooling to fix the positions of the outer frame and numerous wires. These tooling are customized according to the precise dimensions of the seat frame, and through various methods such as mechanical clamps and positioning pins, the outer frame is firmly fixed in place, and at the same time, each longitudinal wire and transverse wire is accurately positioned. In this fixed complex structure, the intersecting parts of the longitudinal wires and transverse wires, the connection parts of the longitudinal wires and the outer frame, and the connection parts of the transverse wires and the outer frame are all set as spot welding points.

[0004] Especially for the processing of L-shaped workpieces in the seat frame, when a pair of L-shaped workpieces need to be welded together, the traditional operation mode exposes significant drawbacks. Currently, the industry generally uses two sets, or even three sets of spot welding tooling to complete this welding task.

[0005] Using multiple sets of spot welding tooling means that workers need to frequently switch between different tooling and strictly follow multiple sets of operation specifications and procedures. This not only places higher requirements on the professional skills and operation proficiency of workers, but also makes the entire operation process complicated and cumbersome.

[0006] Meanwhile, with the change of tooling, workers also need to repeatedly position the workpiece multiple times. For each positioning, it is necessary to strictly follow the positioning standards of the corresponding tooling. However, in actual operation, since the positioning process involves many manual operation steps, such as manually handling the workpiece and adjusting the position, these will inevitably introduce errors. At the same time, there are differences in the manufacturing precision of different toolings itself, which further exacerbates the generation of positioning errors. As the number of repeated positionings increases, these errors will gradually accumulate, eventually resulting in the dimensional deviation of the welded product exceeding the standard range, not only reducing the product qualification rate, but also causing problems such as assembly difficulties in the subsequent assembly process, seriously affecting the smooth operation of the entire production chain. Summary of the Invention

[0007] The object of the present invention is to provide a spot welding positioning and pressing structure, a spot welding device and a spot welding method thereof to solve the above deficiencies in the prior art.

[0008] To achieve the above object, the present invention provides one of the following technical solutions: a spot welding positioning and pressing structure, which is used in the spot welding process of special-shaped steel wires and folded weldments. The structure includes: at least one first end pressing mechanism for pressing the first end of the special-shaped steel wire; at least one middle end pressing mechanism for pressing two places of the transverse rod of the special-shaped steel wire, one place of the folded rod of the special-shaped steel wire and one place of the vertical rod of the special-shaped steel wire; at least one second end pressing mechanism for pressing the second end of the special-shaped steel wire; at least one folded weldment pressing mechanism for pressing the folded weldment so that it is stacked with the spot welding part of the special-shaped steel wire to facilitate subsequent spot welding work; at least one spot welding pressing mechanism for pressing the spot welding part of the special-shaped steel wire; wherein, the first end pressing mechanism, the middle end pressing mechanism and the folded weldment pressing mechanism are located on the same side, and the folded weldment pressing mechanism is located in the middle of the first end pressing mechanism and the middle end pressing mechanism; the second end pressing mechanism and the spot welding pressing mechanism are located on the same side and are arranged opposite to the first end pressing mechanism, the middle end pressing mechanism and the folded weldment pressing mechanism.

[0009] Further, the first end pressing mechanism includes: a first end mounting rib plate; a first end mounting plate, which is height-adjustably mounted on the first end mounting rib plate; a positioning top block, which is mounted on the first end mounting plate; a first end cushion block, which is mounted on the first end mounting plate; a first end pressing groove is provided on the first end cushion block; a first end telescopic cylinder, which is mounted on the first end mounting plate; a first end hinge block, which is mounted on the telescopic end of the first end telescopic cylinder; a first end rotating plate, one end of which is hinged to the first end hinge block; a first end pressing block, which is mounted on the other end of the first end rotating plate; at least two first end locking blocks, which complete the locking of the first end rotating plate and the first end mounting plate through locking bolts; wherein, the first end of the special-shaped steel wire is located in the first end pressing groove of the first end cushion block, and the first end pressing block presses the upper surface of the first end of the special-shaped steel wire; the positioning top block abuts against the edge of the first end of the special-shaped steel wire.

[0010] Further, the middle end pressing mechanism includes: a middle end mounting rib plate; a middle end mounting plate, which is height-adjustably mounted on the middle end mounting rib plate; at least four middle end cushion blocks, which are respectively mounted on the middle end mounting plate; a middle end pressing groove is provided on each of the middle end cushion blocks; a middle end telescopic cylinder, which is mounted on the middle end mounting plate; a middle end hinge block, which is mounted on the telescopic end of the middle end telescopic cylinder; a middle end rotating plate, one end of which is hinged to the middle end hinge block; at least four middle end pressing blocks, which are respectively mounted on the other end of the middle end rotating plate; at least two middle end locking blocks, which complete the locking of the middle end rotating plate and the middle end mounting plate through locking bolts; wherein, two positions of the cross bar of the special-shaped steel wire, one position of the bent bar of the special-shaped steel wire, and one position of the vertical bar of the special-shaped steel wire are respectively located in the corresponding middle end pressing grooves, and the four middle end pressing blocks respectively press the upper surface of the middle end of the special-shaped steel wire.

[0011] Further, the second end pressing mechanism includes: a second end mounting rib plate; a second end mounting plate, which is height-adjustably mounted on the second end mounting rib plate; at least two second end cushion blocks, which are respectively mounted on the second end mounting plate; a second end pressing groove is provided on each of the second end cushion blocks; a second end telescopic cylinder, which is mounted on the second end mounting plate; a second end hinge block, which is mounted on the telescopic end of the second end telescopic cylinder; a second end rotating plate, one end of which is hinged to the second end hinge block; at least two second end pressing blocks, which are respectively mounted on the other end of the second end rotating plate; at least two second end locking blocks, which complete the locking of the second end rotating plate and the second end mounting plate through locking bolts; wherein, the second ends of the special-shaped steel wire are respectively located in the corresponding second end pressing grooves, and the two second end pressing blocks respectively press the upper surface of the second ends of the special-shaped steel wire.

[0012] Furthermore, the folded - shaped weldment pressing mechanism includes: a folded - shaped weldment pressing mounting rib; a folded - shaped weldment pressing mounting plate, which is adjustably mounted on the folded - shaped weldment pressing mounting rib; a folded - shaped weldment pressing top plate, which is mounted on the folded - shaped weldment pressing mounting plate and forms a gap with the folded - shaped weldment pressing mounting plate; the folded - shaped weldment pressing top plate is provided with a pressing block having an arc - shaped groove; a first folded - shaped weldment pressing telescopic cylinder, which is mounted on the folded - shaped weldment pressing mounting plate; a first folded - shaped weldment pressing block, which is connected to the telescopic end of the first folded - shaped weldment pressing telescopic cylinder and is used for pressing the lower end of the folded - shaped weldment; a second folded - shaped weldment pressing telescopic cylinder, which is mounted on the folded - shaped weldment pressing mounting plate and is located above the first folded - shaped weldment pressing telescopic cylinder, and its telescopic direction is the same as that of the first folded - shaped weldment pressing telescopic cylinder; a second folded - shaped weldment pressing block, which is connected to the telescopic end of the second folded - shaped weldment pressing telescopic cylinder and is used for pressing the middle end of the folded - shaped weldment; wherein, one end of the folded - shaped weldment is located on the special - shaped steel wire; the other end of the folded - shaped weldment is inserted into the pressing block with the arc - shaped groove.

[0013] Furthermore, the spot - welding pressing mechanism includes: a spot - welding pressing mounting rib; a spot - welding pressing mounting plate, which is adjustably mounted on the spot - welding pressing mounting rib; a spot - welding pressing telescopic cylinder, which is mounted on the spot - welding pressing mounting plate; a spot - welding pressing hinge block, which is mounted on the telescopic end of the spot - welding pressing telescopic cylinder; a spot - welding pressing rotating plate, one end of which is hinged to the spot - welding pressing hinge block; at least two spot - welding locking blocks, which lock the spot - welding pressing rotating plate and the spot - welding pressing mounting plate through locking bolts; an adjustable spot - welding upper pressing block mechanism, which is mounted on the other end of the spot - welding pressing rotating plate;

[0014] an adjustable spot - welding lower pressing block mechanism, which is located below the adjustable spot - welding upper pressing block mechanism; wherein, the special - shaped steel wire and the folded - shaped weldment are stacked between the adjustable spot - welding upper pressing block mechanism and the adjustable spot - welding lower pressing block mechanism.

[0015] Furthermore, the adjustable spot - welding upper pressing block mechanism includes: an upper adjustment box body, which is mounted on the other end of the spot - welding pressing rotating plate; at least one upper telescopic adjustment column, which is inserted into the upper adjustment box body; an upper fixing plate, which is mounted on one end of the upper telescopic adjustment column; and the upper fixing plate is pressed on the upper adjustment box body through an upper pressing fold plate; an upper adjustment plate, which is mounted on the other end of the upper telescopic adjustment column; an upper adjustment spring, which is sleeved on the upper telescopic adjustment column through a snap ring; an upper spot - welding connection block, one end of which is mounted on the upper adjustment plate; an upper spot - welding connection column, which is located at the other end of the upper spot - welding connection block; an upper spot - welding sheet, which is located on the lower surface of the other end of the upper spot - welding connection block and is connected to the upper spot - welding connection column; an upper circulating cooling pipe inlet; an upper circulating cooling pipe outlet; wherein, the upper circulating cooling pipe inlet and the upper circulating cooling pipe outlet are connected through a U - shaped circulating pipe opened in the upper spot - welding connection block.

[0016] Further, the adjustable spot welding pressing block mechanism includes: a lower adjustment box body fixedly installed on the side surface of the first end pressing mechanism; at least one lower telescopic adjustment column inserted into the lower adjustment box body; a lower fixing plate installed at one end of the lower telescopic adjustment column; and the lower fixing plate is pressed on the lower adjustment box body through a lower pressing folding plate; a lower adjustment plate installed at the other end of the lower telescopic adjustment column; a lower adjustment spring sleeved on the lower telescopic adjustment column through a snap ring; a lower spot welding connection block with one end installed on the lower adjustment plate; a lower spot welding connection column located at the other end of the lower spot welding connection block; a lower spot welding sheet located on the upper surface of the other end of the lower spot welding connection block and connected to the lower spot welding connection column; a lower circulating cooling pipe inlet; a lower circulating cooling pipe outlet; wherein, the lower circulating cooling pipe inlet and the lower circulating cooling pipe outlet are connected through a U-shaped circulating pipe opened in the lower spot welding connection block.

[0017] To achieve the above object, the present invention provides another technical solution as follows: a spot welding device, which includes at least one of the above-mentioned spot welding positioning and pressing structures, and the device further includes: a base, a robotic arm type spot welding mechanism, and an electrical box; wherein, when the number of spot welding positioning and pressing structures is two, the spot welding positioning and pressing structures are symmetrically arranged and fixedly installed on the base; the robotic arm type spot welding mechanism is installed on the top of the device through a rotating robotic arm; when welding a special-shaped wire and a folded weldment, the upper spot welding electrode of the robotic arm type spot welding mechanism is in contact with the upper spot welding sheet; the lower spot welding electrode of the robotic arm type spot welding mechanism is in contact with the lower spot welding sheet.

[0018] To achieve the above object, the present invention provides another technical solution as follows: a spot welding method, which is applicable to the above-mentioned spot welding device, and the method includes:

[0019] S1. Place the special-shaped wire in the first end pressing groove, the middle end pressing groove, and the second end pressing groove through a mechanical grasping device;

[0020] S2. Start the first end telescopic cylinder, the middle end telescopic cylinder, and the second end telescopic cylinder to press the special-shaped wire in the first end pressing groove, the middle end pressing groove, and the second end pressing groove;

[0021] S3. Place the welding end to be welded of the folded weldment on the special-shaped wire through a mechanical grasping device, insert the other end of the folded weldment into the block with an arc groove, and the folded weldment is perpendicular to the special-shaped wire;

[0022] S4. Start the first folded weldment pressing telescopic cylinder and the second folded weldment pressing telescopic cylinder to press the other end of the folded weldment;

[0023] S5. Turn on the spot welding pressing telescopic cylinder to press the welding end of the folded workpiece against the welding end of the special-shaped wire. Among them, the upper spot welding piece is in contact with the welding end of the folded workpiece, and the lower spot welding piece is in contact with the welding end of the special-shaped wire.

[0024] S6. The robotic arm spot welding mechanism reaches the welding position by rotating the robotic arm. The upper spot welding electrode of the robotic arm spot welding mechanism is in contact with the upper spot welding piece; the lower spot welding electrode of the robotic arm spot welding mechanism is in contact with the lower spot welding piece.

[0025] S7. Turn on the upper and lower spot welding electrodes of the robotic arm spot welding mechanism. The upper spot welding electrode presses downward, and then through the adjustable spot welding upper pressing block mechanism and the adjustable spot welding lower pressing block mechanism, make the upper spot welding piece closely fit with the welding end of the folded workpiece, and the lower spot welding piece closely fit with the welding end of the special-shaped wire to complete spot welding.

[0026] S8. After completing spot welding, the robotic arm spot welding mechanism releases the upper and lower spot welding electrodes, moves to the next welding station, and repeats S1 - S7.

[0027] In the above technical solution, with the aid of the mechanical grasping device, the special-shaped wire and the folded workpiece can be accurately placed at the designated positions. The mechanical grasping device can accurately place the special-shaped wire in the first end pressing groove, the middle end pressing groove and the second end pressing groove according to the preset program and the precise positioning system, accurately place the welding end of the folded workpiece on the special-shaped wire, and insert the other end of the folded workpiece into the block with an arc groove, while ensuring that the folded workpiece and the special-shaped wire are perpendicular to each other. In this way, the position accuracy of the welding part is effectively guaranteed, avoiding the positioning deviation that may occur due to manual operation, and thus improving the welding accuracy.

[0028] By using multiple telescopic cylinders to press the special-shaped wire and the folded workpiece respectively, these cylinders can provide stable and uniform pressure, so that the special-shaped wire and the folded workpiece remain closely fitted during the welding process, ensuring that the welding current can evenly pass through the welding part, thereby improving the welding quality and reducing the occurrence of welding defects such as false welding and welding detachment.

[0029] The adjustable spot welding upper pressing block mechanism and the adjustable spot welding lower pressing block mechanism cooperate with the upper and lower spot welding electrodes of the robotic arm spot welding mechanism, enabling the upper spot welding piece to closely fit with the welding end of the folded workpiece and the lower spot welding piece to closely fit with the welding end of the special-shaped wire. This close fit helps to improve the current conduction efficiency, enabling the welding part to quickly heat up and reach the ideal welding state, further improving the welding quality.

[0030] Automated operations reduce the dependence on manual labor and lower labor costs. At the same time, automated equipment can operate continuously for 24 hours, further improving production efficiency and reducing the production cost per unit product. Due to the improved welding precision and quality, the qualified rate of products has also increased accordingly. The product scrap and rework caused by welding defects have been reduced, lowering the production cost. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0032] Figure 1 It is a schematic structural diagram of the spot welding equipment of the present invention.

[0033] Figure 2 It is a schematic structural diagram of the spot welding positioning and pressing structure of the present invention.

[0034] Figure 3 It is a top view of the spot welding positioning and pressing structure of the present invention.

[0035] Figure 4 It is a schematic structural diagram of the first end pressing mechanism of the present invention.

[0036] Figure 5 It is a schematic structural diagram of the first end cushion block of the present invention.

[0037] Figure 6 It is a schematic structural diagram of the middle end pressing mechanism of the present invention.

[0038] Figure 7 It is a schematic structural diagram of the second end pressing mechanism of the present invention.

[0039] Figure 8 It is a schematic structural diagram of the folded weldment pressing mechanism of the present invention.

[0040] Figure 9 It is a side view of the folded weldment pressing mechanism of the present invention.

[0041] Figure 10 It is a schematic structural diagram of the spot welding pressing mechanism of the present invention.

[0042] Figure 11 It is a schematic structural diagram of the adjustable spot welding upper pressing block mechanism of the present invention.

[0043] Figure 12 It is a schematic structural diagram of the adjustable spot welding lower pressing block mechanism of the present invention.

[0044] Figure 13 It is a perspective view of the adjustable downward pressing block mechanism of the present invention.

[0045] Figure 14 It is a schematic position diagram during spot welding of the special-shaped steel wire and the folded welded part of the present invention.

[0046] Explanation of reference numerals:

[0047] 1. First end pressing mechanism; 101. First end mounting rib; 102. First end mounting plate; 103. Positioning top block; 104. First end cushion block; 105. First end pressing groove; 106. First end telescopic cylinder; 107. First end hinge block; 108. First end rotating plate; 109. First end pressing block; 110. First end locking block; 2. Middle end pressing mechanism; 201. Middle end mounting rib; 202. Middle end mounting plate; 203. Middle end cushion block; 204. Middle end pressing groove; 205. Middle end telescopic cylinder; 206. Middle end hinge block; 207. Middle end rotating plate; 208. Middle end pressing block; 209. Middle end locking block; 3. Second end pressing mechanism; 301. Second end mounting rib; 302. Second end mounting plate; 303. Second end cushion block; 304. Second end pressing groove; 305. Second end telescopic cylinder; 306. Second end hinge block; 307. Second end rotating plate; 308. Second end pressing block; 309. Second end locking block; 4. Folded weldment pressing mechanism; 401. Folded weldment pressing mounting rib; 402. Folded weldment pressing mounting plate; 403. Folded weldment pressing top plate; 404. Block with arc groove; 405. First folded weldment pressing telescopic cylinder; 406. First folded weldment pressing block; 407. Second folded weldment pressing telescopic cylinder; 408. Second folded weldment pressing block; 5. Spot welding pressing mechanism; 501. Spot welding pressing mounting rib; 502. Spot welding pressing mounting plate; 503. Spot welding pressing telescopic cylinder; 504. Spot welding pressing hinge block; 505. Spot welding pressing rotating plate; 506. Spot welding locking block; 507. Adjustable spot welding upper pressing block mechanism; 5071. Upper adjusting box; 5072. Upper telescopic adjusting column; 5073. Upper fixing plate; 5074. Upper pressing fold plate; 5075. Upper adjusting plate; 5076. Upper adjusting spring; 5077. Upper spot welding connection block; 5078. Upper spot welding connection column; 5079. Upper spot welding sheet; 50710. Upper circulating cooling pipe inlet; 50711. Upper circulating cooling pipe outlet; 508. Adjustable spot welding lower pressing block mechanism; 5081. Lower adjusting box; 5082. Lower telescopic adjusting column; 5083. Lower fixing plate; 5084. Lower pressing fold plate; 5085. Lower adjusting plate; 5086. Lower adjusting spring; 5087. Lower spot welding connection block; 5088. Lower spot welding connection column; 5089. Lower spot welding sheet; 50810. Lower circulating cooling pipe inlet; 50811. Lower circulating cooling pipe outlet; 6. Base; 7. Robotic arm type spot welding mechanism; 8. Electrical box. Detailed implementation mode

[0048] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further introduced in detail below in conjunction with the accompanying drawings.

[0049] Example 1

[0050] according to Figure 2 and Figure 14 As shown, the spot welding positioning and pressing structure is used in the spot welding process of special-shaped steel wire and folded weldment. The structure includes:

[0051] according to Figures 4 - 5 As shown, at least one first end clamping mechanism 1 is used to clamp the first end of the special-shaped steel wire.

[0052] Furthermore, the first end clamping mechanism 1 includes a first end mounting rib 101. Specifically, the first end clamping mechanism 1 utilizes the first end mounting rib 101 as a basic support structure. This provides a stable support platform for other components throughout the spot welding process, ensuring the entire mechanism remains stable and reliable even under significant pressure.

[0053] The first end mounting plate 102 is height-adjustably mounted on the first end mounting rib 101. Specifically, this height adjustment is achieved via a threaded adjustment mechanism. By simply rotating the adjustment bolt, the operator can precisely position the first end mounting plate 102 according to the actual height of the shaped steel wire. This design allows the mechanism to adapt to both large industrial shaped steel wires and compact, small shaped steel wires, greatly enhancing its versatility.

[0054] The positioning top block 103 is mounted on the first end mounting plate 102. Specifically, in actual operation, the positioning top block 103 can support the edge of the first end of the special-shaped steel wire, effectively limiting the horizontal displacement of the special-shaped steel wire by physical blocking, ensuring that the steel wire always remains in the preset position during the spot welding process, providing a guarantee for welding accuracy.

[0055] The first end spacer 104 is mounted on the first end mounting plate 102. A first end compression groove 105 is formed on the first end spacer 104. Specifically, the shape of the first end compression groove 105 matches the cross-sectional shape of the special-shaped steel wire, enhancing the positioning effect of the steel wire and also buffering the compression force to a certain extent, preventing deformation of the steel wire due to excessive pressure.

[0056] The first end telescopic cylinder 106 is mounted on the first end mounting plate 102. Specifically, by controlling the flow of compressed air, the first end telescopic cylinder 106 can achieve rapid and stable telescopic movement. When the shaped wire needs to be compressed, the cylinder extends, pushing the connected first end hinge block 107 to move.

[0057] The first end hinge block 107 is mounted on the telescopic end of the first end telescopic cylinder 106. Specifically, the first end hinge block 107 serves as a bridge connecting the first end telescopic cylinder 106 and the first end rotating plate 108. The first end hinge block 107 utilizes a spherical hinge design, which not only transmits the power of the first end telescopic cylinder 106 but also allows the first end rotating plate 108 to rotate flexibly within a certain range, facilitating the smooth compression operation.

[0058] One end of the first end rotating plate 108 is hinged to the first end hinge block 107. Specifically, in actual operation, after completing the positioning and pressing of the special-shaped steel wire, the operator only needs to tighten the locking bolt to keep the first end rotating plate 108 in a stable state, thereby preventing the pressing force from changing due to vibration or other external factors during the spot welding process, which may affect the welding quality.

[0059] The first end clamp 109 is mounted on the other end of the first end rotating plate 108. Specifically, during installation, the operator can flexibly adjust the installation angle and position of the first end clamp 109 according to the actual spot welding requirements, thereby ensuring that the first end clamp 109 is always perpendicular to the upper surface of the steel wire when compressing the special-shaped steel wire, thereby achieving the best compression effect.

[0060] In addition, a shock-absorbing buffer pad is provided at the connection between the first end pressure block 109 and the first end rotating plate 108, which can effectively buffer the impact force generated when the first end rotating plate 108 drives the pressure block to press down, which not only protects the first end pressure block 109 and the special-shaped steel wire, but also extends the overall service life of the equipment.

[0061] At least two first-end locking blocks 110 are used to lock the first-end rotating plate 108 to the first-end mounting plate 102 via locking bolts. Specifically, during actual operation, after positioning and tightening the special-shaped steel wire, the operator can use a dedicated torque wrench to sequentially tighten the locking bolts according to a pre-set torque value. This ensures that the force applied by each locking bolt is uniform, preventing the first-end rotating plate 108 from tilting due to uneven force, and ensures that the connection between the first-end rotating plate 108 and the first-end mounting plate 102 is optimally secured.

[0062] The first end of the special-shaped steel wire is located in the first end pressing groove 105 of the first end pad 104, and the first end pressing block 109 presses the upper surface of the first end of the special-shaped steel wire; the positioning top block 103 presses the edge of the first end of the special-shaped steel wire. Specifically, when the spot welding process is carried out, the first end of the special-shaped steel wire (i.e. Figure 14The middle compression point A) is precisely placed within the first end compression groove 105 of the first end pad 104. The design of the first end compression groove 105 has been carefully considered, and its shape closely matches the cross-sectional profile of the shaped steel wire, just like tailoring a piece of clothing to the specific needs of the wire. This allows the shaped steel wire to fit naturally within it, closely fitting the groove wall, and limiting the horizontal and vertical displacement of the wire to the greatest extent possible, providing a stable foundation for subsequent compression and welding work.

[0063] At the same time, the first-end telescopic cylinder 106, under the control system's command, extends its piston rod, driving the first-end hinge block 107 forward. During this process, the first-end rotating plate 108 rotates about its hinge point with the first-end hinge block 107, and the first-end pressure block 109, mounted on its other end, moves downward until it fully contacts the upper surface of the first end of the shaped steel wire. The bottom surface of the first-end pressure block 109 has been specially treated to provide an appropriate roughness, significantly enhancing friction with the steel wire and preventing it from slipping during welding. Its design, which conforms to the surface of the shaped steel wire, ensures even pressure distribution and prevents deformation of the wire due to excessive local pressure.

[0064] Furthermore, a positioning block 103 is mounted on the first end mounting plate 102. Its position and angle have been precisely adjusted to precisely support the edge of the first end of the shaped steel wire once it is in place. This physical barrier further limits the horizontal displacement of the shaped steel wire, particularly the slight displacement caused by current surges, mechanical vibrations, and other factors during spot welding. This ensures that the shaped steel wire remains in the preset welding position, ensuring welding accuracy and consistency and creating favorable conditions for forming high-quality welds between the shaped steel wire and the folded weldment.

[0065] according to Figure 6 As shown, the structure further includes: at least one intermediate end pressing mechanism 2, which is used to press two locations of the transverse rod of the special-shaped steel wire, one location of the folding rod of the special-shaped steel wire, and one location of the vertical rod of the special-shaped steel wire;

[0066] Furthermore, the intermediate end clamping mechanism 2 includes an intermediate end mounting rib 201. Specifically, the intermediate end mounting rib 201 provides a stable mounting base for other components. The surface of the intermediate end mounting rib 201 is anodized, which not only enhances its wear resistance but also improves its corrosion resistance, thereby extending the service life of the equipment.

[0067] The middle end mounting plate 202 is mounted on the middle end mounting rib 201 in a height-adjustable manner. Specifically, this height adjustment function is achieved through a threaded adjustment device. The staff only needs to simply rotate the adjustment bolt to accurately position the middle end mounting plate 202 according to the actual height of the profiled wire. Whether it is large-sized industrial profiled wire or small-sized delicate profiled wire, this mechanism can adapt to the wire through this design, greatly improving the versatility of the mechanism.

[0068] At least four middle end cushion blocks 203 are respectively mounted on the middle end mounting plate 202; each of the middle end cushion blocks 203 is provided with a middle end pressing groove 204. Specifically, the shape and size of each middle end pressing groove 204 are specially designed according to different parts of the profiled wire, and can closely fit the surfaces of the transverse rod, folding rod and vertical rod, providing stable support and positioning for the profiled wire.

[0069] The middle end telescopic cylinder 205 is mounted on the middle end mounting plate 202. Specifically, the middle end telescopic cylinder 205 adopts a double-acting piston structure, and can achieve fast and stable telescopic movement by controlling the inlet and outlet of compressed air. During the working process, when the control system issues a pressing instruction, compressed air enters the rodless cavity of the cylinder, pushing the piston and piston rod to extend, thereby driving the middle end hinge block 206 connected thereto to move.

[0070] The middle end hinge block 206 is mounted on the telescopic end of the middle end telescopic cylinder 205. Specifically, the middle end hinge block 206 is made of high-strength alloy steel and its surface is carburized, having good wear resistance and fatigue resistance. The middle end hinge block 206 is designed with a unique spherical hinge structure, which can not only transmit the power of the middle end telescopic cylinder 205, but also allow the middle end rotating plate 207 to rotate flexibly within a certain range, providing the necessary degree of freedom for the smooth progress of the pressing action.

[0071] The middle end rotating plate 207 has one end hinged to the middle end hinge block 206. Specifically, the middle end rotating plate 207 is made of high-strength carbon fiber composite material, which has the characteristics of light weight and high strength, and can reduce the overall weight of the mechanism while ensuring the stability of the mechanism. Driven by the middle end telescopic cylinder 205, the middle end rotating plate 207 rotates around the hinge point with the middle end hinge block 206 as the axis, thereby driving the middle end pressing block 208 to move downward to achieve pressing of the profiled wire.

[0072] At least four middle end pressing blocks 208 are respectively mounted on the other end of the middle end rotating plate 207.

[0073] Specifically, at least four intermediate end pressing blocks 208 are made of special alloy steel, and their surfaces are nitrided, having good hardness and wear resistance. The bottom surface of each intermediate end pressing block 208 is specially designed according to different parts of the profiled steel wire, and can closely fit with the upper surfaces of the transverse rod, the folding rod and the vertical rod, ensuring uniform pressure distribution during the pressing process and avoiding wire deformation caused by excessive local pressure.

[0074] At least two intermediate end locking blocks 209 lock the intermediate end rotating plate 207 and the intermediate end mounting plate 202 through locking bolts. Specifically, during the actual operation process, after the staff complete the positioning and pressing of the profiled steel wire, they can use a special torque wrench to tighten the locking bolts in sequence according to the preset torque value. This can not only ensure that the force applied by each locking bolt is uniform, prevent the intermediate end rotating plate 207 from tilting due to uneven force, but also ensure that the connection between the intermediate end rotating plate 207 and the intermediate end mounting plate 202 reaches the best fastening state.

[0075] Among them, two places of the transverse rod of the profiled steel wire (i.e., Figure 14 pressing position B and pressing position C), one place of the folding rod of the profiled steel wire (i.e., Figure 14 pressing position D), and one place of the vertical rod of the profiled steel wire (i.e., Figure 14 pressing position F) are respectively located in the corresponding intermediate end pressing grooves 204, and the four intermediate end pressing blocks 208 respectively press the upper surface of the intermediate end of the profiled steel wire. Specifically, during the actual working process, two places of the transverse rod, one place of the folding rod and one place of the vertical rod of the profiled steel wire will be accurately placed in the corresponding intermediate end pressing grooves 204 respectively. When the piston rod of the intermediate end telescopic cylinder 205 extends, driving the intermediate end rotating plate 207 to rotate, the four intermediate end pressing blocks 208 will move downward accordingly, respectively pressing the upper surface of the intermediate end of the profiled steel wire. At the same time, by tightening the locking bolts on the intermediate end locking blocks 209, the intermediate end rotating plate 207 and the intermediate end mounting rib plate 201 are firmly locked, ensuring that the profiled steel wire always remains stable during the spot welding process and providing a reliable guarantee for achieving high-quality welding.

[0076] This structure further includes: at least one second end pressing mechanism 3, which is used to press the second end of the profiled steel wire.

[0077] According to Figure 7As shown, further, the second end pressing mechanism 3 includes: a second end mounting rib plate 301. Specifically, the second end mounting rib plate 301 is made of high-strength aluminum alloy. This material not only has good mechanical strength, which can provide a stable installation foundation for other components, but also has a relatively light weight, which helps to reduce the weight of the entire mechanism and the energy consumption during equipment operation. The surface of the second end mounting rib plate 301 has been anodized, which not only enhances its wear resistance but also improves its corrosion resistance, extending the service life of the equipment.

[0078] A second end mounting plate 302, which is installed on the second end mounting rib plate 301 with adjustable height. Specifically, this height adjustment function is achieved through a threaded adjustment device. The staff only needs to simply rotate the adjustment bolt to accurately position the second end mounting plate 302 according to the actual height of the profiled wire. Whether it is a large-sized industrial profiled wire or a small-sized delicate profiled wire, this mechanism can adapt to the wire through this design, greatly improving the versatility of the mechanism.

[0079] At least two second end cushion blocks 303, which are respectively installed on the second end mounting plate 302; each of the second end cushion blocks 303 is provided with a second end pressing groove 304. Specifically, the second end cushion blocks 303 are made of a new type of polymer composite material. This material not only has excellent wear resistance but also has a certain degree of flexibility. Each second end cushion block 303 is designed with a second end pressing groove 304, whose shape and size are specifically customized according to the contour of the second end of the profiled wire. When the profiled wire is in place, it can fit tightly, effectively restricting the displacement of the wire in all directions and providing a stable positioning foundation for the subsequent pressing operation.

[0080] A second end telescopic cylinder 305, which is installed on the second end mounting plate 302. Specifically, the second end telescopic cylinder 305 adopts a double-acting piston structure. By controlling the inflow and outflow of compressed air, it can achieve fast and stable telescopic movement. During the working process, when the control system issues a pressing command, compressed air enters the rodless cavity of the cylinder, pushing the piston and the piston rod to extend, thereby driving the second end hinge block 306 connected to it to move.

[0081] A second end hinge block 306, which is installed on the telescopic end of the second end telescopic cylinder 305. Specifically, it is made of high-strength aluminum alloy and has been subjected to hard anodizing treatment, which not only reduces its own weight but also significantly improves the surface hardness and wear resistance. The second end hinge block 306 uses a unique double-axis hinge design, which can not only efficiently transmit the driving force of the cylinder but also provides a flexible rotation degree of freedom for the second end rotating plate 307, enabling it to smoothly complete the pressing action.

[0082] The second-end rotating plate 307, one end of which is hinged to the second-end hinge block 306. Specifically, the second-end rotating plate 307 is made of lightweight and high-strength titanium alloy material. This material effectively reduces the overall weight while ensuring the structural strength, and reduces the energy consumption during the operation of the equipment. Driven by the second-end telescopic cylinder 305, the second-end rotating plate 307 rotates around the hinge point, driving the second-end pressing block 308 to move downward to achieve the pressing operation on the second end of the special-shaped wire.

[0083] At least two second-end pressing blocks 308, which are respectively installed on the other end of the second-end rotating plate 307. Specifically, these pressing blocks are made of special alloy steel and the surface is treated with a special heat treatment process, greatly improving the hardness and wear resistance. The bottom surface of each second-end pressing block 308 is optimized according to the shape of the second end of the special-shaped wire to ensure that during the pressing process, it can fully contact the surface of the wire, making the pressure evenly distributed and avoiding wire deformation caused by excessive local pressure.

[0084] At least two second-end locking blocks 309, which complete the locking of the second-end rotating plate 307 and the second-end mounting plate 302 through locking bolts. Specifically, to ensure that the second-end rotating plate 307 remains stable during the spot welding process and will not loosen due to vibration or other external forces, at least two second-end locking blocks 309 firmly connect the second-end rotating plate 307 and the second-end mounting rib plate 301 through locking bolts. The second-end locking blocks 309 are made of high-strength alloy steel and the surface is treated with galvanization, having good rust prevention performance. In actual operation, when the staff completes the positioning and pressing of the special-shaped wire, a professional torque wrench is used to tighten the locking bolts according to the specified torque value, so as to ensure that the second-end rotating plate 307 always remains stable during the spot welding process.

[0085] Among them, the second end of the special-shaped wire (i.e., Figure 14 the pressing points E and G) are respectively located in the corresponding second-end pressing grooves 304, and the two second-end pressing blocks 308 respectively press the upper surface of the second end of the special-shaped wire. Specifically, during the actual spot welding operation, the second end of the special-shaped wire will be accurately placed in the corresponding second-end pressing groove 304. When the second-end telescopic cylinder 305 is started and pushes the second-end rotating plate 307 to rotate, the two second-end pressing blocks 308 move downward accordingly and respectively press the upper surface of the second end of the special-shaped wire. Immediately afterwards, the staff tightens the locking bolts on the second-end locking blocks 309 to firmly lock the second-end rotating plate 307 and the second-end mounting plate 302, ensuring that the second end of the special-shaped wire always remains stable during the entire spot welding process, providing a solid guarantee for achieving high-quality welding operations.

[0086] The structure further includes: at least one folded - part pressing mechanism 4, which is used to press the folded part so that it is stacked with the spot - welding part of the special - shaped wire, facilitating subsequent spot - welding work;

[0087] As shown in Figures 8 - 9 shown, further, the folded - part pressing mechanism 4 includes: a folded - part pressing mounting rib 401. Specifically, the folded - part pressing mounting rib 401 is made of high - strength aluminum alloy. This material not only has good mechanical strength, providing a stable installation foundation for other components, but also has a relatively light weight, which helps to reduce the weight of the entire mechanism and the energy consumption during equipment operation. The surface of the folded - part pressing mounting rib 401 is anodized, which not only enhances its wear resistance but also improves its corrosion resistance, extending the service life of the equipment.

[0088] A folded - part pressing mounting plate 402, which is installed on the folded - part pressing mounting rib 401 with adjustable height. Specifically, this height - adjustment function is achieved through a threaded adjustment device. Workers only need to simply rotate the adjustment bolt to accurately position the position of the folded - part pressing mounting plate 402 according to the actual height of the special - shaped wire. Whether it is large - sized industrial special - shaped wire or small - sized delicate special - shaped wire, this mechanism can adapt to the wire through this design, greatly enhancing the versatility of the mechanism.

[0089] A folded - part pressing top plate 403, which is installed on the folded - part pressing mounting plate 402 and forms a gap with the folded - part pressing mounting plate 402; the folded - part pressing top plate 403 is provided with a block 404 having an arc - shaped groove.

[0090] Specifically, the folded - part pressing top plate 403 is provided with a carefully designed block 404 having an arc - shaped groove. The curvature radius of the block 404 having an arc - shaped groove is specially customized according to the end shape of the folded part. When one end of the folded part is inserted into the block 404 having an arc - shaped groove, the two can fit tightly, limiting the welded part from the side and above to prevent the welded part from shaking or displacing during the welding process.

[0091] A first folded - part pressing telescopic cylinder 405, which is installed on the folded - part pressing mounting plate 402. Specifically, this cylinder adopts a double - acting piston - type structure. During operation, by controlling the inlet and outlet of compressed air, the piston is pushed to drive the piston rod to make a reciprocating linear motion. Before spot - welding operation, when the control system issues a pressing command, compressed air enters the rodless cavity of the cylinder, and the piston rod extends, driving the connected first folded - part pressing block 406 to move towards the lower end of the folded part until the welded part is pressed tightly.

[0092] The first folded - shaped weldment pressing block 406 is connected to the telescopic end of the first folded - shaped weldment pressing telescopic cylinder 405 and is used to press the lower end of the folded - shaped weldment. Specifically, the material of the first folded - shaped weldment pressing block 406 is polyurethane rubber with good wear resistance and buffering performance. This material can not only provide reliable frictional force for the folded - shaped weldment during the pressing process to prevent the weldment from sliding, but also avoid damaging the surface of the weldment due to rigid extrusion. The pressing surface of the first folded - shaped weldment pressing block 406 is specially designed, and its shape matches the contour of the lower end of the folded - shaped weldment to ensure uniform pressure distribution during pressing.

[0093] The second folded - shaped weldment pressing telescopic cylinder 407 is installed on the folded - shaped weldment pressing mounting plate 402 and is located above the first folded - shaped weldment pressing telescopic cylinder 405. Its telescopic direction is the same as that of the first folded - shaped weldment pressing telescopic cylinder 405. Specifically, the second folded - shaped weldment pressing telescopic cylinder 407 adopts the same technical specifications as the first folded - shaped weldment pressing telescopic cylinder 405. The two work together to press the folded - shaped weldment more comprehensively and stably.

[0094] The second folded - shaped weldment pressing block 408 is connected to the telescopic end of the second folded - shaped weldment pressing telescopic cylinder 407 and is used to press the middle end of the folded - shaped weldment. Specifically, the second folded - shaped weldment pressing block 408 also uses polyurethane rubber material, and the shape of its pressing surface is optimized according to the shape of the middle part of the folded - shaped weldment to ensure that during the pressing process, it can provide sufficient pressure for the weldment without damaging the weldment.

[0095] One end of the folded - shaped weldment is located on the special - shaped wire; the other end of the folded - shaped weldment is inserted into the block 404 with an arc - shaped groove. Specifically, during actual spot - welding operation, one end of the folded - shaped weldment is placed on the special - shaped wire and is ready to be welded with the wire. The other end is accurately inserted into the block 404 with an arc - shaped groove of the folded - shaped weldment pressing top plate 403. Subsequently, the first folded - shaped weldment pressing telescopic cylinder 405 and the second folded - shaped weldment pressing telescopic cylinder 407 are started simultaneously. The first folded - shaped weldment pressing block 406 and the second folded - shaped weldment pressing block 408 move towards the lower end and the middle end of the folded - shaped weldment respectively, firmly pressing the weldment. Through this multi - part collaborative pressing method, the folded - shaped weldment remains stable during the spot - welding process, greatly improving the welding quality and production efficiency.

[0096] According to Figures 10 - 13 shown, the structure further includes at least one spot - welding pressing mechanism 5, which is used to press the spot - welding part of the special - shaped wire.

[0097] Further, the spot welding pressing mechanism 5 includes: a spot welding pressing mounting rib plate 501. Specifically, the spot welding pressing mounting rib plate 501 is made of high-strength and high-toughness alloy steel. This material not only has excellent compressive and anti-deformation capabilities, and can still maintain a stable structural form under long-term large pressure, but also has good machining performance, facilitating the precise machining of various mounting holes and positioning surfaces. During the manufacturing process, the spot welding pressing mounting rib plate 501 has gone through multiple fine machining processes, with extremely high surface flatness, ensuring the accuracy and stability of subsequent component installation.

[0098] A spot welding pressing mounting plate 502, which is height-adjustably mounted on the spot welding pressing mounting rib plate 501.

[0099] Specifically, this height adjustment function is achieved through a threaded adjustment device. The staff only needs to simply rotate the adjustment bolt to accurately position the spot welding pressing mounting plate 502 according to the actual height of the special-shaped wire. Whether it is a large-sized industrial special-shaped wire or a small-sized delicate special-shaped wire, this mechanism can adapt to the wire through this design, greatly improving the versatility of the mechanism.

[0100] A spot welding pressing telescopic cylinder 503, which is mounted on the spot welding pressing mounting plate 502. Specifically, the spot welding pressing telescopic cylinder 503 adopts a double-acting piston structure, which can not only provide a strong and stable thrust, but also has a fast response speed and smooth movement. During the working process, when the control system issues a pressing instruction, compressed air enters the air chamber of the cylinder, and the gas pressure is converted into the pressure of hydraulic oil through a gas-liquid conversion device to push the piston rod to quickly extend, driving the spot welding pressing hinge block 504 to move.

[0101] A spot welding pressing hinge block 504, which is mounted on the telescopic end of the spot welding pressing telescopic cylinder 503. Specifically, the spot welding pressing hinge block 504 is made of high-strength aluminum alloy and is anodized, which not only reduces its own weight but also improves the surface hardness and wear resistance. The spot welding pressing hinge block 504 adopts a unique universal hinge design, which can not only effectively transmit the driving force of the spot welding pressing telescopic cylinder 503, but also provides multiple-direction rotational degrees of freedom for the spot welding pressing rotating plate 505, enabling it to flexibly adjust its position to adapt to different spot welding requirements.

[0102] The spot welding pressing rotating plate 505 has one end hinged to the spot welding pressing hinge block 504. Specifically, the spot welding pressing rotating plate 505 is made of high-strength carbon fiber composite material, which has the advantages of light weight, high strength, corrosion resistance, etc. While ensuring the structural strength of the mechanism, it effectively reduces the overall weight and the energy consumption during the operation of the equipment. Driven by the spot welding pressing telescopic cylinder 503, the spot welding pressing rotating plate 505 rotates around the hinge point, driving the adjustable spot welding upper pressing block mechanism 507 to approach the adjustable spot welding lower pressing block mechanism 508, realizing the pressing of the special-shaped steel wire and the folded weldment.

[0103] At least two spot welding locking blocks 506, which complete the locking of the spot welding pressing rotating plate 505 and the spot welding pressing mounting plate 502 through locking bolts. Specifically, in actual operation, after the operator completes the positioning and pressing of the special-shaped steel wire and the folded weldment, a special torque wrench is used to tighten the locking bolts according to the pre-set torque value to ensure that the spot welding pressing rotating plate 505 always remains stable during the spot welding process and will not loosen due to vibration or other external forces.

[0104] The adjustable spot welding upper pressing block mechanism 507 is installed at the other end of the spot welding pressing rotating plate 505; the adjustable spot welding lower pressing block mechanism 508 is located below the adjustable spot welding upper pressing block mechanism 507. Specifically, during operation, the special-shaped steel wire and the folded weldment are stacked between the adjustable spot welding upper pressing block mechanism 507 and the adjustable spot welding lower pressing block mechanism 508, and through their coordinated action, the stable pressing of the welding part is realized.

[0105] Among them, the special-shaped steel wire and the folded weldment are stacked between the adjustable spot welding upper pressing block mechanism 507 and the adjustable spot welding lower pressing block mechanism 508. Specifically, during actual spot welding operation, first, according to the size and shape of the special-shaped steel wire and the folded weldment, the height of the spot welding pressing mounting plate 502 is adjusted through the screw-nut lifting system to adjust the mechanism to a suitable position. Then, the special-shaped steel wire and the folded weldment are placed between the adjustable spot welding upper pressing block mechanism 507 and the adjustable spot welding lower pressing block mechanism 508 and preliminary positioning is carried out. Next, the spot welding pressing telescopic cylinder 503 is started to push the spot welding pressing rotating plate 505 to rotate, so that the adjustable spot welding upper pressing block mechanism 507 gradually approaches the adjustable spot welding lower pressing block mechanism 508 to press the special-shaped steel wire and the folded weldment. Finally, by tightening the locking bolts on the spot welding locking blocks 506, the spot welding pressing rotating plate 505 is fixed to ensure that the special-shaped steel wire and the folded weldment always remain stable during the spot welding process, creating good conditions for high-quality welding operation.

[0106] Furthermore, the adjustable spot welding upper pressing block mechanism 507 includes: an upper adjustment box body 5071, which is installed at the other end of the spot welding pressing and rotating plate 505. Specifically, the upper adjustment box body 5071 is made of aluminum alloy and is tightly installed at the other end of the spot welding pressing and rotating plate 505 through high-strength bolts. The aluminum alloy material not only has a light mass, which can reduce the load of the entire mechanism and is beneficial to the operation of the equipment, but also has excellent heat dissipation performance, can quickly dissipate the heat generated during the spot welding process, and avoid damage to components due to overheating. Its internal structure is carefully designed with multiple precisely positioned slots to provide stable support for the installation of the upper telescopic adjustment column 5072, ensure the accurate installation position of each component, and guarantee the normal operation of the mechanism.

[0107] At least one upper telescopic adjustment column 5072, which is inserted into the upper adjustment box body 5071. Specifically, these adjustment columns are made of high-carbon steel, processed by quenching and tempering, with high surface hardness, strong wear resistance and fatigue resistance. Their outer walls are engraved with precise scales, and operators can intuitively understand the telescopic length of the adjustment columns through the scales, so as to perform precise adjustment. At the same time, a clearance fit is adopted between the adjustment columns and the slots of the upper adjustment box body 5071, which can not only ensure the free telescoping of the adjustment columns, but also ensure stability after adjustment and avoid shaking.

[0108] An upper fixing plate 5073, which is installed at one end of the upper telescopic adjustment column 5072; and the upper fixing plate 5073 is pressed on the upper adjustment box body 5071 through an upper pressing fold plate 5074. Specifically, the upper fixing plate 5073 is installed at one end of the upper telescopic adjustment column 5072 and is made of stainless steel, with good rigidity and corrosion resistance. It is pressed on the upper adjustment box body 5071 through the upper pressing fold plate 5074. The upper pressing fold plate 5074 is made of high-strength spring steel, and uses its own elastic deformation to tightly press the upper fixing plate 5073 to ensure its close fit with the upper adjustment box body 5071. This design not only enhances the stability of the upper telescopic adjustment column 5072 during operation, but also can fine-tune the position of the upper telescopic adjustment column 5072 by adjusting the pressing degree of the upper pressing fold plate 5074, improving the flexibility of adjustment.

[0109] An upper adjustment plate 5075, which is installed at the other end of the upper telescopic adjustment column 5072. Specifically, the upper adjustment plate 5075 is installed at the other end of the upper telescopic adjustment column 5072, and the material is engineering plastic. This material has good insulation and certain flexibility, can not only prevent current leakage and ensure operation safety, but also play a buffering role during the pressing process to avoid hard impact on components such as the upper spot welding connection block 5077. The surface of the upper adjustment plate 5075 is designed with anti-slip patterns, which increases the friction with the upper spot welding connection block 5077 and prevents displacement during adjustment.

[0110] The upper adjusting spring 5076 is sleeved on the upper telescopic adjusting column 5072 through a snap ring. Specifically, the upper adjusting spring 5076 is made of high-quality alloy steel and has a high elastic limit and fatigue life after a special heat treatment process. During the spot welding process, it can automatically adjust the elastic force according to the pressure change to ensure that the upper spot welding piece 5079 always maintains a stable pressure contact with the welding part. When the pressure is too high, the spring will compress to buffer the pressure; when the pressure decreases, the spring will stretch to maintain the necessary pressing force, thus ensuring the stability of the welding quality.

[0111] The upper spot welding connection block 5077, one end of which is installed on the upper adjusting plate 5075. The upper spot welding connection column 5078 is located at the other end of the upper spot welding connection block 5077. The upper spot welding piece 5079 is located on the lower surface of the other end of the upper spot welding connection block 5077 and is connected to the upper spot welding connection column 5078. Specifically, one end of the upper spot welding connection block 5077 is installed on the upper adjusting plate 5075 and is made of a copper alloy with good electrical conductivity, which can effectively conduct the spot welding current. The other end is provided with an upper spot welding connection column 5078. The upper spot welding connection column 5078 is a cylindrical structure and is connected to the upper spot welding connection block 5077 by welding to ensure stable current transmission. The upper spot welding piece 5079 is located on the lower surface of the other end of the upper spot welding connection block 5077 and is connected to the upper spot welding connection column 5078, directly contacting the welding part. The upper spot welding piece 5079 is made of an alloy material with high temperature resistance and wear resistance, and its surface has been specially treated, having good electrical conductivity and thermal conductivity, which can ensure the spot welding effect while withstanding high temperature and pressure.

[0112] The upper circulating cooling pipe inlet 50710; the upper circulating cooling pipe outlet 50711. Among them, the upper circulating cooling pipe inlet 50710 and the upper circulating cooling pipe outlet 50711 are connected through a U-shaped circulating pipeline opened in the upper spot welding connection block 5077. Specifically, the upper circulating cooling pipe inlet 50710 and the upper circulating cooling pipe outlet 50711 are connected through a U-shaped circulating pipeline opened in the upper spot welding connection block 5077. The upper circulating cooling pipe inlet 50710 and the upper circulating cooling pipe outlet 50711 are made of stainless steel pipes, having good corrosion resistance and compressive resistance. When designing the U-shaped circulating pipeline, the resistance of the water flow and the heat dissipation efficiency are fully considered. A large amount of heat generated during the spot welding process is taken away by the circulating coolant, effectively reducing the temperature of the upper spot welding piece 5079 and the welding part, preventing the solder joints from deforming and oxidizing due to overheating, prolonging the service life of the upper spot welding piece 5079, and improving the stability of the welding quality.

[0113] Further, the adjustable spot welding pressing block mechanism 508 includes: a lower adjustment box body 5081, which is fixedly installed on the side surface of the first end pressing mechanism 1. Specifically, the lower adjustment box body 5081 is made of aluminum alloy material and is fixedly installed on the side surface of the first end pressing mechanism 1 through a plurality of high-strength bolts. The installation process undergoes precise measurement and calibration to ensure that the lower adjustment box body 5081 maintains a good relative position relationship with other components of the entire spot welding system. Its interior is designed with precise guide grooves, providing accurate guidance for the insertion and movement of the lower telescopic adjustment column 5082, ensuring the accuracy and stability of the adjustment.

[0114] At least one lower telescopic adjustment column 5082, which is inserted into the lower adjustment box body 5081. Specifically, the lower telescopic adjustment column 5082 is precisely inserted into the lower adjustment box body 5081, and the clearance between it and the guide groove is extremely small to ensure that there is no shaking or deviation during the telescopic process. Clear scales are engraved on the outer wall of the lower telescopic adjustment column 5082, and the operator can precisely control the telescopic length of the adjustment column according to the specific requirements of spot welding, thereby adjusting the height position of the lower spot welding sheet 5089.

[0115] A lower fixing plate 5083, which is installed at one end of the lower telescopic adjustment column 5082; and the lower fixing plate 5083 is pressed and installed on the lower adjustment box body 5081 through a lower pressing folding plate 5084. Specifically, the lower fixing plate 5083 is pressed and installed on the lower adjustment box body 5081 through the lower pressing folding plate 5084. The lower pressing folding plate 5084 is made of spring steel and has strong elasticity and toughness. During the installation process, by tightening the bolts on the lower pressing folding plate 5084, sufficient pressure can be generated to firmly fix the lower fixing plate 5083 on the lower adjustment box body 5081. At the same time, this pressing and installation method also allows for fine adjustment of the position of the lower telescopic adjustment column 5082 when needed to adapt to workpieces of different specifications.

[0116] A lower adjustment plate 5085, which is installed at the other end of the lower telescopic adjustment column 5082. Specifically, the lower adjustment plate 5085 is installed at the other end of the lower telescopic adjustment column 5082, made of aluminum alloy material, with light weight and good heat dissipation performance. Its surface has undergone special treatment, with high flatness and smoothness, and can closely fit with the lower spot welding connection block 5087 to ensure uniform force transmission. Multiple positioning holes are also provided on the lower adjustment plate 5085 for accurately installing the lower spot welding connection block 5087 to ensure the position accuracy of the lower spot welding sheet 5089.

[0117] The lower adjusting spring 5086 is sleeved on the lower telescopic adjusting column 5082 through a snap ring. Specifically, the lower adjusting spring 5086 is sleeved on the lower telescopic adjusting column 5082 through a snap ring, made of high-quality spring steel, with an accurate elastic coefficient and good fatigue performance. During the spot welding process, the lower adjusting spring 5086 plays a role in buffering and adjusting pressure. When the adjustable spot welding upper pressure block mechanism 507 applies pressure downward, the lower adjusting spring 5086 will be compressed, generating a reverse elastic force, enabling the lower spot welding piece 5089 to closely contact the welded part, while avoiding damage to the welded part caused by excessive pressure.

[0118] The lower spot welding connection block 5087, one end of which is installed on the lower adjusting plate 5085. The lower spot welding connection column 5088 is located at the other end of the lower spot welding connection block 5087. The lower spot welding piece 5089 is located on the upper surface of the other end of the lower spot welding connection block 5087 and is connected to the lower spot welding connection column 5088. Specifically, one end of the lower spot welding connection block 5087 is installed on the lower adjusting plate 5085, made of a copper alloy with high electrical conductivity, which can effectively conduct the spot welding current. Its internal structure has been optimized to reduce the resistance and energy loss during the current transmission process. The lower spot welding connection column 5088 is located at the other end of the lower spot welding connection block 5087 and is firmly connected to the lower spot welding connection block 5087 through a welding process to ensure that the current can be stably transmitted to the lower spot welding piece 5089. The lower spot welding piece 5089 is located on the upper surface of the other end of the lower spot welding connection block 5087 and is connected to the lower spot welding connection column 5088. It is made of an alloy material resistant to high temperature and wear, and its surface has been specially hardened, enabling it to maintain good performance in a high-temperature and high-pressure spot welding environment, ensuring the stability of the welding quality.

[0119] The lower circulating cooling pipe inlet 50810; the lower circulating cooling pipe outlet 50811; wherein, the lower circulating cooling pipe inlet 50810 and the lower circulating cooling pipe outlet 50811 are connected through a U-shaped circulating pipe opened in the lower spot welding connection block 5087. Specifically, the lower circulating cooling pipe inlet 50810 and the lower circulating cooling pipe outlet 50811 are connected through a U-shaped circulating pipe opened in the lower spot welding connection block 5087. The lower circulating cooling pipe inlet 50810 and the lower circulating cooling pipe outlet 50811 are made of stainless steel pipes, with good corrosion resistance and sealing performance. The design of the U-shaped circulating pipe enables the cooling liquid to fully flow through the lower spot welding connection block 5087, taking away a large amount of heat generated during the spot welding process. The cooling liquid flows in from the lower circulating cooling pipe inlet 50810, circulates in the U-shaped circulating pipe, absorbs heat and then flows out from the lower circulating cooling pipe outlet 50811, effectively reducing the temperature of the lower spot welding connection block 5087 and the lower spot welding piece 5089, extending their service life, and ensuring the stability and reliability of the spot welding process.

[0120] Among them, the first end pressing mechanism 1, the middle end pressing mechanism 2 and the folded weldment pressing mechanism 4 are located on the same side, and the folded weldment pressing mechanism 4 is located in the middle of the first end pressing mechanism 1 and the middle end pressing mechanism 2; the second end pressing mechanism 3 and the spot welding pressing mechanism 5 are located on the same side and are arranged opposite to the first end pressing mechanism 1, the middle end pressing mechanism 2 and the folded weldment pressing mechanism 4.

[0121] Embodiment 2

[0122] According to Figure 1 As shown, a spot welding device, which includes at least one spot welding positioning and pressing structure described in Embodiment 1 above. The device further includes: a base 6. Specifically, when the number of spot welding positioning and pressing structures is two, they are fixedly installed on the base 6 in an exact symmetrical manner. During the installation process, the staff will use high-precision measuring tools for positioning and calibration, and fix the spot welding positioning and pressing structures on the base 6 through multiple high-strength bolts to ensure that there will be no displacement or shaking during the welding process, thus providing a solid foundation for the welding quality.

[0123] The device further includes: a robotic arm type spot welding mechanism 7. Specifically, the robotic arm type spot welding mechanism 7 is the core operating component of the device. It is installed on the top of the device through a rotating robotic arm. The rotating robotic arm adopts an advanced articulated design and has multiple degrees of freedom, enabling flexible movement and rotation in three-dimensional space. High-precision servo motors and reducers are equipped at each joint part of the robotic arm, enabling precise position control and movement speed adjustment. The main structure of the robotic arm is made of lightweight and high-strength aluminum alloy material, which effectively reduces its own weight while ensuring structural strength, improving the flexibility and response speed of movement.

[0124] An upper spot welding electrode and a lower spot welding electrode are installed at the end of the robotic arm type spot welding mechanism 7. When welding the special-shaped steel wire and the folded weldment, the robotic arm type spot welding mechanism 7 will accurately move the upper spot welding electrode to the position where it fits with the upper spot welding piece 5079 and move the lower spot welding electrode to the position where it fits with the lower spot welding piece 5089 according to the pre-set program through the rotating robotic arm. During the fitting process, the robotic arm will real-time monitor the fitting pressure through a force sensor to ensure that the contact pressure between the upper spot welding electrode and the upper spot welding piece 5079 and between the lower spot welding electrode and the lower spot welding piece 5089 is uniform and appropriate, so as to ensure that the current can stably pass through the welding part and achieve high-quality welding.

[0125] Among them, when the number of spot welding positioning and pressing structures is two, the spot welding positioning and pressing structures are symmetrically arranged and fixedly installed on the base 6; the robotic arm type spot welding mechanism 7 is installed on the top of the equipment through a rotating robotic arm; when welding the special-shaped steel wire and the folded weldment, the upper spot welding electrode of the robotic arm type spot welding mechanism 7 is in contact with the upper spot welding sheet 5079; the lower spot welding electrode of the robotic arm type spot welding mechanism 7 is in contact with the lower spot welding sheet 5089.

[0126] The equipment further includes: an electrical control box 8. Specifically, various electrical control components are installed inside the electrical control box 8, such as a programmable logic controller (PLC), a transformer, a contactor, a relay, etc. These electrical components are connected together through a carefully designed circuit to achieve precise control and coordinated operation of each component of the equipment.

[0127] In addition, the electrical control box 8 is also equipped with various protection devices, such as overcurrent protection, overvoltage protection, leakage protection, etc., which can cut off the power supply in time when abnormal conditions occur in the equipment to protect the safety of the equipment and the operator.

[0128] During actual welding operations, the operator first places the special-shaped steel wire and the folded weldment in the corresponding positions of the spot welding positioning and pressing structure, and precisely positions and firmly presses them through the spot welding positioning and pressing structure. Then, the operator sends a welding instruction to the electrical control box 8 through the operation panel. After receiving the instruction, the electrical control box 8 controls the robotic arm type spot welding mechanism 7 to start operating. The robotic arm type spot welding mechanism 7 moves the upper spot welding electrode and the lower spot welding electrode to the positions in contact with the upper spot welding sheet 5079 and the lower spot welding sheet 5089 respectively through the rotating robotic arm. At the same time, the electrical control box 8 controls the transformer to output an appropriate welding current, and the current forms a loop through the upper spot welding electrode, the upper spot welding sheet 5079, the special-shaped steel wire, the folded weldment, the lower spot welding sheet 5089 and the lower spot welding electrode, generating resistance heat at the welding part, melting and fusing the contact points of the special-shaped steel wire and the folded weldment together quickly to complete the welding process. After welding is completed, the robotic arm type spot welding mechanism 7 returns to the initial position, and the operator can take out the welded workpiece to perform the next round of welding operations.

[0129] Embodiment 3

[0130] A spot welding method, which is applicable to the spot welding equipment described in the above Embodiment 2, and the method includes:

[0131] S1. Use a mechanical gripping device to place the special-shaped steel wire in the first end compression groove 105, the middle end compression groove 204, and the second end compression groove 304. Specifically, a mechanical gripping device equipped with a high-precision visual recognition system is used to accurately identify the shape and size of the special-shaped steel wire. The gripping claws of the mechanical gripping device are specially designed and inlaid with soft and non-slip rubber pads, which can firmly grasp the special-shaped steel wire without damaging its surface. According to a pre-set program, the mechanical gripping device accurately moves to the special-shaped steel wire storage area. Through fine-tuning the positioning, the gripping claws firmly grasp the special-shaped steel wire. Subsequently, the mechanical gripping device transports the special-shaped steel wire to the top of the spot welding positioning and compression structure according to the planned path. Through precise position control, the first end, the middle key part, and the second end of the special-shaped steel wire are placed in the first end compression groove 105, the middle end compression groove 204, and the second end compression groove 304, respectively, preparing for the subsequent compression operation.

[0132] S101, through the position sensing sensors embedded in the inner side surfaces of the first end pressing groove 105, the middle end pressing groove 204 and the second end pressing groove 304, it is possible to sequentially sense whether each part of the special-shaped steel wire is correctly located in the first end pressing groove 105, the middle end pressing groove 204 and the second end pressing groove 304. When each position sensing sensor senses that each part of the special-shaped steel wire is located in the first end pressing groove 105, the middle end pressing groove 204 and the second end pressing groove 304, then proceed to S2; otherwise, the mechanical grasping device is turned on again to grasp the special-shaped steel wire and re-place it. Specifically, after the special-shaped steel wire is placed in the designated position by the mechanical grasping device, the three position sensing sensors will sequentially detect the corresponding parts of the special-shaped steel wire in a specific order. The sensor in the first end clamping groove 105 starts first, quickly scanning the end of the steel wire to determine whether it falls accurately at the preset position in the groove; then, the sensor in the middle end clamping groove 204 starts working to detect the middle position of the special-shaped steel wire; finally, the sensor in the second end clamping groove 304 detects the other end of the steel wire.

[0133] If the information feedback from each position sensing sensor indicates that all parts of the special-shaped steel wire are accurately located in the first end clamping groove 105, the middle end clamping groove 204 and the second end clamping groove 304, the system will automatically trigger the subsequent S2 processing step to promote the smooth progress of the production process.

[0134] Conversely, once any sensor feedback indicates a deviation in the position of the special-shaped steel wire, the control system will immediately send a command to the mechanical grasping device to activate the mechanical grasping device again. The mechanical grasping device operates precisely, quickly grasps the special-shaped steel wire, and repositions it according to the preset program. Then the sensor conducts detection again until all parts of the special-shaped steel wire are in the correct position, thus ensuring the accuracy and stability of the entire production process.

[0135] S2. Activate the first end telescopic cylinder 106, the middle end telescopic cylinder 205, and the second end telescopic cylinder 305 to press-fit the special-shaped steel wire into the first end pressing groove 105, the middle end pressing groove 204, and the second end pressing groove 304.

[0136] S201. When the special-shaped steel wire is in place, the control system sends commands to the first end telescopic cylinder 106, the middle end telescopic cylinder 205, and the second end telescopic cylinder 305. The first end telescopic cylinder 106 starts, pushes the first end hinge block 107, drives the first end rotating plate 108 and the first end pressing block 109 to act, and presses the first end of the special-shaped steel wire into the first end pressing groove 105. Through the first pressure sensor installed at the bottom of the first end pressing groove 105, it senses and feedbacks whether the first end of the special-shaped steel wire is pressed into the first end pressing groove 105. If the feedback indicates proper pressing, proceed to S202; otherwise, control the first end telescopic cylinder 106 to lift the first end pressing block 109 and repeat the pressing process. Specifically, the first pressure sensor utilizes the advanced piezoelectric effect principle and can keenly capture pressure changes. When the first end of the special-shaped steel wire is pressed, the surface of the pressure sensor is subjected to the pressure from the wire end. The sensor converts this pressure signal into an electrical signal and transmits it to the control system in real-time, thereby sensing and feedbacking whether the first end of the special-shaped steel wire is pressed into the first end pressing groove 105 and whether the pressing force meets the preset process standards. The control system makes precise judgments and analyses based on the signals feedbacked by the sensor. If the pressing force does not meet the standard, it will issue further action commands to the first end telescopic cylinder 106 to ensure that the special-shaped steel wire is stably and effectively pressed.

[0137] S202. The piston rod of the middle end telescopic cylinder 205 extends, driving the middle end hinge block 206 and the middle end rotating plate 207 to rotate, so that multiple middle end pressing blocks 208 press down simultaneously, and the corresponding parts of the cross bar, folding bar and vertical bar of the special-shaped steel wire are stably pressed in the middle end pressing groove 204. Through the middle pressure sensor installed at the bottom of the middle end pressing groove 204, it senses and feedbacks whether the middle end of the special-shaped steel wire is pressed into the middle end pressing groove 204; if the feedback is pressed, S203 is carried out; otherwise, the middle end telescopic cylinder 205 is controlled to lift multiple middle end pressing blocks 208 and re-perform the pressing process. Specifically, the middle pressure sensor uses the advanced piezoelectric effect principle. When the middle end pressing block 208 presses the special-shaped steel wire into the middle end pressing groove 204, the steel wire generates pressure on the surface of the sensor, and the sensor quickly senses this pressure change and converts it into an electrical signal and transmits it to the control system. The control system accurately judges whether the second end of the special-shaped steel wire has been effectively pressed into the middle end pressing groove 204 according to the received signal.

[0138] S203. The second end telescopic cylinder 305 also works synchronously, pushing the second end hinge block 306 and the second end rotating plate 307, so that the second end pressing block 308 presses the second end of the special-shaped steel wire into the second end pressing groove 304. Through the second pressure sensor installed at the bottom of the second end pressing groove 304, it senses and feedbacks whether the second end of the special-shaped steel wire is pressed into the second end pressing groove 304; if the feedback is pressed, S3 is carried out; otherwise, the second end telescopic cylinder 305 is controlled to lift multiple second end pressing blocks 308 and re-perform the pressing process.

[0139] At the same time, during this process, the pressure output of each cylinder is monitored in real time and accurately controlled to ensure that the special-shaped steel wire can be evenly and stably pressed at each part.

[0140] S3. The to-be-welded end of the folded weldment is placed on the special-shaped steel wire through a mechanical grasping device, and the other end of the folded weldment is inserted into the block with an arc-shaped groove, and the folded weldment is perpendicular to the special-shaped steel wire;

[0141] S301. Use the position sensing sensors embedded in the inner side surfaces of the arc groove to sense whether the other end of the folded weldment is correctly located in the arc groove. When the position sensing sensors all sense that the other end of the folded weldment is located in the arc groove, proceed to S4; otherwise, turn on the mechanical grasping device again to grasp the folded weldment and re-place it. Specifically, after the mechanical grasping device completes the placement of the special-shaped steel wire, it quickly switches to the folded weldment storage area. Similarly, with the help of the visual recognition system, the position and posture of the folded weldment are identified and located. The grippers of the mechanical grasping device are adaptively adjusted to accurately grasp the folded weldment. Then, the mechanical grasping device transports the folded weldment to the top of the spot welding station, and through precise angle and position control, the end of the folded weldment to be welded is stably placed on the special-shaped steel wire to ensure that the welding parts of the two are accurately aligned. At the same time, the other end of the folding weldment is inserted into the block 404 with an arc groove of the folding weldment pressing top plate 403, and the folding weldment and the special-shaped steel wire are ensured to be perpendicular to each other, laying the foundation for subsequent pressing and welding operations.

[0142] S4, open the first folding weldment pressing telescopic cylinder 405 and the second folding weldment pressing telescopic cylinder 407 to press the other end of the folding weldment;

[0143] S401. After the folding weldment is in place, the control system sends instructions to the first folding weldment pressing telescopic cylinder 405 and the second folding weldment pressing telescopic cylinder 407. The first folding weldment pressing telescopic cylinder 405 is activated to press the other end of the folding weldment against the folding weldment pressing top plate 403. The third pressure sensor installed on the folding weldment pressing top plate 403 senses and feedback whether the other end of the folding weldment is pressed against the folding weldment pressing top plate 403. If the feedback is pressed, S402 is performed; otherwise, the first folding weldment pressing telescopic cylinder 405 is controlled to move the first folding weldment pressing block 406 away and the pressing process is restarted.

[0144] S402, the second folding weldment pressing telescopic cylinder 407 is started, pushing the second folding weldment pressing block 408 to move toward the middle end of the folding weldment, pressing the other end of the folding weldment to the folding weldment pressing top plate 403, and through the third pressure sensor installed on the folding weldment pressing top plate 403, it is sensed again whether the middle end of the folding weldment is pressed to the folding weldment pressing top plate 403; if the feedback is pressed, step 5 is performed; otherwise, the first folding weldment pressing telescopic cylinder 405 is controlled to move the first folding weldment pressing block 406 away, and the pressing process is restarted.

[0145] This system achieves coordinated compression of multiple parts of the folding weldment. During the compression process, the pressure sensor monitors the compression force in real time to ensure that the folding weldment remains stable throughout the welding process.

[0146] S5. Activate the spot welding pressing telescopic cylinder 503 to press the welding end of the folded workpiece against the welding end of the special-shaped steel wire. Among them, the upper spot welding piece 5079 is in contact with the welding end of the folded workpiece, and the lower spot welding piece 5089 is in contact with the welding end of the special-shaped steel wire. Specifically, the control system sends a command to the spot welding pressing telescopic cylinder 503, and the spot welding pressing telescopic cylinder 503 starts, pushing the spot welding pressing hinge block 504 and the spot welding pressing rotating plate 505 to rotate. The adjustable spot welding upper pressing block mechanism 507 installed at the other end of the spot welding pressing rotating plate 505 moves downward accordingly, making the upper spot welding piece 5079 gradually approach the welding end of the folded workpiece. At the same time, the adjustable spot welding lower pressing block mechanism 508 serves as a support to ensure the stable position of the welding end of the special-shaped steel wire. When the upper and lower spot welding pieces are respectively in contact with the welding ends of the folded workpiece and the special-shaped steel wire, the spot welding pressing telescopic cylinder 503 continues to apply a certain pressure to achieve the preliminary pressing of the welding part, creating good conditions for the subsequent spot welding operation.

[0147] S6. The robotic arm type spot welding mechanism 7 reaches the welding position through the rotating robotic arm. The upper spot welding electrode of the robotic arm type spot welding mechanism 7 is in contact with the upper spot welding piece 5079; the lower spot welding electrode of the robotic arm type spot welding mechanism 7 is in contact with the lower spot welding piece 5089. Specifically, after receiving the command sent by the control system, the robotic arm type spot welding mechanism 7 starts to act through the rotating robotic arm. Each joint of the rotating robotic arm is driven by a high-precision servo motor and can achieve fast and accurate positioning. The robotic arm type spot welding mechanism 7 moves along the preset path, making the upper and lower spot welding electrodes of the robotic arm type spot welding mechanism 7 approach the adjustable spot welding upper pressing block mechanism 507 and the adjustable spot welding lower pressing block mechanism 508 respectively. When reaching the welding position, the upper spot welding electrode is precisely in contact with the upper spot welding piece 5079, and the lower spot welding electrode is precisely in contact with the lower spot welding piece 5089, preparing for the subsequent spot welding operation.

[0148] S7. Turn on the upper and lower welding electrodes of the robotic arm type spot welding mechanism 7. Press the upper welding electrode downward tightly. Then, through the adjustable upper pressure block mechanism 507 and the adjustable lower pressure block mechanism 508 of the spot welding, make the upper welding sheet 5079 fit tightly with the welding end of the folded workpiece, and make the lower welding sheet 5089 fit tightly with the welding end of the special-shaped steel wire to complete the spot welding. Specifically, when the upper and lower welding electrodes of the robotic arm type spot welding mechanism 7 are in contact with the corresponding welding sheets, the control system sends a spot welding instruction to the robotic arm type spot welding mechanism 7. Under the control of the control system, the upper welding electrode applies a certain pressure downward. At the same time, the upper adjusting spring 5076 and the lower adjusting spring 5086 in the adjustable upper pressure block mechanism 507 and the adjustable lower pressure block mechanism 508 are elastically adjusted according to the preset pressure to ensure that the upper welding sheet 5079 fits tightly with the welding end of the folded workpiece and the lower welding sheet 5089 fits tightly with the welding end of the special-shaped steel wire. At this time, the spot welding current forms a loop through the upper welding electrode, the upper welding sheet 5079, the folded workpiece, the special-shaped steel wire, the lower welding sheet 5089 and the lower welding electrode, generating resistance heat at the welding part, melting the metal at the welding part quickly and fusing them together to complete the spot welding operation. During the spot welding process, the spot welding current and the temperature of the welding part are monitored in real time through the current sensor and the temperature sensor to ensure the stability and reliability of the spot welding process.

[0149] S8. After completing the spot welding, the robotic arm type spot welding mechanism 7 releases the upper and lower welding electrodes, moves to the next welding station to be processed, and repeats S1 - S7. Specifically, after completing the spot welding, the robotic arm type spot welding mechanism 7 receives the instruction sent by the control system, releases the upper and lower welding electrodes, and moves to the next welding station to be processed according to the preset path. At the same time, each pressing cylinder is released in sequence. The mechanical grasping device takes out the welded workpiece and places the new special-shaped steel wire and folded workpiece in the corresponding positions, repeating the operations of S1 - S7 to realize the automatic cycle of the spot welding operation and improve the production efficiency.

[0150] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. Spot welding positioning and clamping structure, which is used in the spot welding process of special-shaped steel wires and folded weldments, and is characterized in that The structure includes: At least one first end pressing mechanism (1) for pressing the first end of the profiled steel wire; At least one intermediate end pressing mechanism (2) for pressing two places of the transverse rod of the profiled steel wire, one place of the folded rod of the profiled steel wire, and one place of the vertical rod of the profiled steel wire; At least one second end pressing mechanism (3) for pressing the second end of the profiled steel wire; At least one folded weldment pressing mechanism (4) for pressing the folded weldment to stack it with the spot welding part of the profiled steel wire, facilitating subsequent spot welding work; At least one spot welding pressing mechanism (5) for pressing the spot welding part of the profiled steel wire; the spot welding pressing mechanism (5) includes an adjustable spot welding upper pressing block mechanism (507) and an adjustable spot welding lower pressing block mechanism (508), and the profiled steel wire and the folded weldment are stacked between the adjustable spot welding upper pressing block mechanism (507) and the adjustable spot welding lower pressing block mechanism (508); The spot welding end of the adjustable spot welding upper pressing block mechanism (507) is in close contact with the welding end to be welded of the folded weldment, and the spot welding end of the adjustable spot welding lower pressing block mechanism (508) is in close contact with the welding end to be welded of the profiled steel wire, which is used to improve the current conduction efficiency, enable the welding part to be welded to quickly heat up and reach the preset welding state, and improve the welding quality; Among them, the first end pressing mechanism (1), the intermediate end pressing mechanism (2), and the folded weldment pressing mechanism (4) are located on the same side, and the folded weldment pressing mechanism (4) is located in the middle of the first end pressing mechanism (1) and the intermediate end pressing mechanism (2); The second end pressing mechanism (3) and the spot welding pressing mechanism (5) are located on the same side and are arranged opposite to the first end pressing mechanism (1), the intermediate end pressing mechanism (2), and the folded weldment pressing mechanism (4); The spot welding pressing mechanism (5) includes: A spot welding pressing mounting rib plate (501); A spot welding pressing mounting plate (502) which is installed on the spot welding pressing mounting rib plate (501) with adjustable height; A spot welding pressing telescopic cylinder (503) which is installed on the spot welding pressing mounting plate (502); A spot welding pressing hinge block (504) which is installed on the telescopic end of the spot welding pressing telescopic cylinder (503); A spot welding pressing rotating plate (505) whose one end is hinged to the spot welding pressing hinge block (504); At least two spot welding locking blocks (506) which complete the locking of the spot welding pressing rotating plate (505) and the spot welding pressing mounting plate (502) through locking bolts; Among them, the adjustable spot welding upper pressing block mechanism (507) is installed on the other end of the spot welding pressing rotating plate (505); The adjustable spot welding lower pressing block mechanism (508) is located below the adjustable spot welding upper pressing block mechanism (507); The profiled steel wire and the folded weldment are stacked between the adjustable spot welding upper pressing block mechanism (507) and the adjustable spot welding lower pressing block mechanism (508); The adjustable spot welding upper pressing block mechanism (507) includes: An upper adjustment box body (5071) which is installed on the other end of the spot welding pressing rotating plate (505); At least one upper telescopic adjustment column (5072) which is inserted into the upper adjustment box body (5071); The upper fixing plate (5073) is installed at one end of the upper telescopic adjusting column (5072); and the upper fixing plate (5073) is pressed and installed on the upper adjusting box body (5071) through the upper pressing and folding plate (5074); The upper adjusting plate (5075) is installed at the other end of the upper telescopic adjusting column (5072); The upper adjusting spring (5076) is sleeved on the upper telescopic adjusting column (5072) through a snap ring; The upper spot welding connecting block (5077), one end of which is installed on the upper adjusting plate (5075); The upper spot welding connecting column (5078) is located at the other end of the upper spot welding connecting block (5077); The upper spot welding piece (5079) is located on the lower surface of the other end of the upper spot welding connecting block (5077) and is connected to the upper spot welding connecting column (5078); The upper circulating cooling pipe inlet (50710); The upper circulating cooling pipe outlet (50711); Wherein, the upper circulating cooling pipe inlet (50710) and the upper circulating cooling pipe outlet (50711) are connected through a U-shaped circulating pipe opened in the upper spot welding connecting block (5077).

2. The spot welding positioning and pressing structure according to claim 1, wherein The first end pressing mechanism (1) includes: The first end mounting rib plate (101); The first end mounting plate (102) is installed on the first end mounting rib plate (101) with adjustable height; The positioning top block (103) is installed on the first end mounting plate (102); The first end cushion block (104) is installed on the first end mounting plate (102); a first end pressing groove (105) is provided on the first end cushion block (104); The first end telescopic cylinder (106) is installed on the first end mounting plate (102); The first end hinge block (107) is installed on the telescopic end of the first end telescopic cylinder (106); The first end rotating plate (108), one end of which is hinged to the first end hinge block (107); The first end pressing block (109) is installed on the other end of the first end rotating plate (108); At least two first end locking blocks (110) lock the first end rotating plate (108) and the first end mounting plate (102) through locking bolts; Wherein, the first end of the special-shaped steel wire is located in the first end pressing groove (105) of the first end cushion block (104), and the first end pressing block (109) presses the upper surface of the first end of the special-shaped steel wire; the positioning top block (103) abuts against the edge of the first end of the special-shaped steel wire.

3. The spot welding positioning and pressing structure according to claim 2, characterized in that, The middle end pressing mechanism (2) includes: The middle end mounting rib plate (201); The middle end mounting plate (202) is installed on the middle end mounting rib plate (201) with adjustable height; At least four middle end cushion blocks (203) are respectively installed on the middle end mounting plate (202); a middle end pressing groove (204) is provided on each middle end cushion block (203); The middle end telescopic cylinder (205) is installed on the middle end mounting plate (202); The middle end hinge block (206) is installed on the telescopic end of the middle end telescopic cylinder (205); An intermediate end rotating plate (207) with one end hinged to an intermediate end hinged block (206); At least four intermediate end pressing blocks (208) respectively installed on the other end of the intermediate end rotating plate (207); At least two intermediate end locking blocks (209) that lock the intermediate end rotating plate (207) and the intermediate end mounting plate (202) through locking bolts; Wherein, two places of the transverse rod of the special-shaped steel wire, one place of the folded rod of the special-shaped steel wire, and one place of the vertical rod of the special-shaped steel wire are respectively located in the corresponding intermediate end pressing grooves (204), and the four intermediate end pressing blocks (208) respectively press the upper surface of the intermediate end of the special-shaped steel wire.

4. The spot welding positioning and pressing structure according to claim 3, characterized in that, The second end pressing mechanism (3) includes: A second end mounting rib plate (301); A second end mounting plate (302) adjustably installed on the second end mounting rib plate (301); At least two second end cushion blocks (303) respectively installed on the second end mounting plate (302); each of the second end cushion blocks (303) is provided with a second end pressing groove (304); A second end telescopic cylinder (305) installed on the second end mounting plate (302); A second end hinged block (306) installed on the telescopic end of the second end telescopic cylinder (305); A second end rotating plate (307) with one end hinged to the second end hinged block (306); At least two second end pressing blocks (308) respectively installed on the other end of the second end rotating plate (307); At least two second end locking blocks (309) that lock the second end rotating plate (307) and the second end mounting plate (302) through locking bolts; Wherein, the second ends of the special-shaped steel wire are respectively located in the corresponding second end pressing grooves (304), and the two second end pressing blocks (308) respectively press the upper surface of the second end of the special-shaped steel wire.

5. The spot welding positioning and pressing structure according to claim 4, characterized in that, The folded weldment pressing mechanism (4) includes: A folded weldment pressing mounting rib plate (401); A folded weldment pressing mounting plate (402) adjustably installed on the folded weldment pressing mounting rib plate (401); A folded weldment pressing top plate (403) installed on the folded weldment pressing mounting plate (402) and forming a gap with the folded weldment pressing mounting plate (402); the folded weldment pressing top plate (403) is provided with a pressing block (404) having an arc-shaped groove; A first folded weldment pressing telescopic cylinder (405) installed on the folded weldment pressing mounting plate (402); A first folded weldment pressing block (406) connected to the telescopic end of the first folded weldment pressing telescopic cylinder (405) for pressing the lower end of the folded weldment; A second folded weldment pressing telescopic cylinder (407) installed on the folded weldment pressing mounting plate (402); and located above the first folded weldment pressing telescopic cylinder (405), and its telescopic direction is the same as that of the first folded weldment pressing telescopic cylinder (405); The second folded weldment pressing block (408) is connected to the telescopic end of the second folded weldment pressing telescopic cylinder (407) and is used to press the middle end of the folded weldment; One end of the folded weldment is located on the special-shaped steel wire; the other end of the folded weldment is inserted into the abutting block (404) with an arc-shaped groove.

6. The spot welding positioning and pressing structure according to claim 5, characterized in that, The adjustable spot welding pressing block mechanism (508) includes: The lower adjustment box body (5081) is fixedly installed on the side surface of the first end pressing mechanism (1); At least one lower telescopic adjustment column (5082) is inserted into the lower adjustment box body (5081); The lower fixing plate (5083) is installed at one end of the lower telescopic adjustment column (5082); and the lower fixing plate (5083) is pressed on the lower adjustment box body (5081) through the lower pressing plate (5084); The lower adjustment plate (5085) is installed at the other end of the lower telescopic adjustment column (5082); The lower adjustment spring (5086) is sleeved on the lower telescopic adjustment column (5082) through a snap ring; The lower spot welding connection block (5087), one end of which is installed on the lower adjustment plate (5085); The lower spot welding connection column (5088) is located at the other end of the lower spot welding connection block (5087); The lower spot welding sheet (5089) is located on the upper surface of the other end of the lower spot welding connection block (5087) and is connected to the lower spot welding connection column (5088); The lower circulating cooling pipe inlet (50810); The lower circulating cooling pipe outlet (50811); Wherein, the lower circulating cooling pipe inlet (50810) and the lower circulating cooling pipe outlet (50811) are connected through a U-shaped circulating pipe opened in the lower spot welding connection block (5087).

7. Spot welding equipment, characterized in that, This equipment includes the spot welding positioning and pressing structure described in claim 6, and this equipment further includes: The base (6); The robotic arm type spot welding mechanism (7); The electrical box (8); Wherein, when the number of the spot welding positioning and pressing structures is two, the spot welding positioning and pressing structures are symmetrically arranged and fixedly installed on the base (6); The robotic arm type spot welding mechanism (7) is installed on the top of the equipment through a rotating robotic arm; When welding the special-shaped steel wire and the folded weldment is required, the upper welding electrode of the robotic arm type spot welding mechanism (7) is attached to the upper welding sheet (5079); the lower welding electrode of the robotic arm type spot welding mechanism (7) is attached to the lower welding sheet (5089).

8. Spot welding method, characterized in that, This method is applicable to the spot welding equipment described in claim 7, and this method includes: S1. Place the special-shaped steel wire in the first end pressing groove (105), the middle end pressing groove (204) and the second end pressing groove (304) through a mechanical gripping device; S2. Turn on the first end telescopic cylinder (106), the middle end telescopic cylinder (205) and the second end telescopic cylinder (305) to press the special-shaped steel wire into the first end pressing groove (105), the middle end pressing groove (204) and the second end pressing groove (304); S3. Place the welding end to be welded of the folded weldment on the special-shaped steel wire through a mechanical gripping device, insert the other end of the folded weldment into the abutting block with an arc-shaped groove, and the folded weldment and the special-shaped steel wire are perpendicular to each other; S4. Activate the first folded workpiece pressing telescopic cylinder (405) and the second folded workpiece pressing telescopic cylinder (407) to press the other end of the folded workpiece. S5. Activate the spot welding pressing telescopic cylinder (503) to press the welding end of the folded workpiece and the welding end of the special-shaped steel wire together. Among them, the upper spot welding piece (5079) is in contact with the welding end of the folded workpiece, and the lower spot welding piece (5089) is in contact with the welding end of the special-shaped steel wire. S6. The robotic arm spot welding mechanism (7) reaches the welding position by rotating the robotic arm. The upper spot welding electrode of the robotic arm spot welding mechanism (7) is in contact with the upper spot welding piece (5079); the lower spot welding electrode of the robotic arm spot welding mechanism (7) is in contact with the lower spot welding piece (5089). S7. Activate the upper and lower spot welding electrodes of the robotic arm spot welding mechanism (7). The upper spot welding electrode presses downward, and then through the adjustable spot welding upper pressing block mechanism (507) and the adjustable spot welding lower pressing block mechanism (508), make the upper spot welding piece (5079) closely contact with the welding end of the folded workpiece, and the lower spot welding piece (5089) closely contact with the welding end of the special-shaped steel wire to complete spot welding. S8. After completing spot welding, the robotic arm spot welding mechanism (7) releases the upper and lower spot welding electrodes, moves to the next welding station, and repeats S1 - S7.

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