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

Abstract

The invention discloses a spot welding positioning and pressing structure, spot welding equipment and a spot welding method of the spot welding equipment, and the spot welding positioning and pressing structure is used in the spot welding process of special-shaped steel wires and zigzag weldments. The structure comprises at least one first end pressing mechanism, at least one middle end pressing mechanism, at least one second end pressing mechanism, at least one zigzag weldment pressing mechanism and at least one spot welding pressing mechanism. The equipment comprises at least one spot welding positioning and pressing structure. The method is suitable for the spot welding equipment. According to the invention, automatic operation is realized, the dependence on manpower is reduced, and the labor cost is reduced. And meanwhile, the automatic equipment can realize 24-hour continuous operation, so that the production efficiency is further improved, and the production cost of unit products is reduced. Due to the fact that welding precision and quality are improved, the qualified rate of products is correspondingly improved. Product scrapping and reworking caused by welding defects are reduced, and the production cost is reduced.

Description

Technical Field

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

[0002] In today's booming automotive seat manufacturing industry, the common structure of automotive seats is composed of key components such as seat frames, foam strips, and external covering masks. As the core supporting structure of the entire seat, the importance of the seat frame is self-evident. It is mainly composed of an outer frame and a steel wire frame carefully placed inside the outer frame. The construction of the steel wire frame is exquisite, and it is made up of multiple longitudinal steel wires and multiple transverse steel wires interwoven with each other through a specific process. These longitudinal and transverse steel wires are closely arranged in a criss-cross manner according to precisely calculated spacing and angles. In the production workshop, workers focus on positioning and interweaving the steel wires one by one. As the operation progresses, a very regular and orderly mesh structure is finally formed. An in-depth analysis of the processing of the seat frame under the existing technical system will reveal its shortcomings. In the initial stage of seat frame processing, the method usually adopted is to use specially designed tooling to fix the outer frame and the positions of many steel wires. These toolings are customized according to the precise dimensions of the seat frame. Through mechanical clamps, positioning pins and other methods, the outer frame is firmly fixed in the specified position, and the longitudinal and transverse steel wires are also accurately positioned. In this complex structure after fixing, the interlaced parts of the longitudinal steel wires and the transverse steel wires, the connection between the longitudinal steel wires and the outer frame, and the connection between the transverse steel wires and the outer frame are all set as spot welding points. Especially for the processing of L-shaped workpieces in seat frames, when a pair of L-shaped workpieces need to be welded together, the traditional operation mode exposes significant drawbacks. At present, the industry generally uses two or even three sets of spot welding tools to complete this welding task.

[0003] Using multiple sets of spot welding tools means that workers need to frequently switch between different tools and strictly follow multiple sets of operating specifications and processes. This not only places higher demands on workers' professional skills and operational proficiency, but also makes the entire operation process complicated and cumbersome.

[0004] At the same time, as the tooling switches, workers need to repeatedly position the workpiece. Each positioning must be strictly compared with the positioning standards of the corresponding tooling. However, in actual operation, since the positioning process involves many manual operation steps, such as manual handling of workpieces, adjustment of positions, etc., these will inevitably introduce errors. At the same time, there are differences in the manufacturing accuracy of different tooling itself, which further aggravates the generation of positioning errors. As the number of repeated positioning increases, these errors will gradually accumulate, and eventually cause the size deviation of the product after welding to exceed the standard range, which not only reduces the product qualification rate, but also causes problems such as assembly difficulties in the subsequent assembly process, seriously affecting the smooth operation of the entire production chain. Summary of the invention

[0005] The purpose of the present invention is to provide a spot welding positioning and clamping structure, a spot welding device and a spot welding method thereof, so as to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides one of the following technical solutions: a spot welding positioning and clamping structure, which is used in the spot welding process of special-shaped steel wire and folded weldment, and the structure includes: at least one first end clamping mechanism, which is used to clamp the first end of the special-shaped steel wire; at least one middle end clamping mechanism, which is used to clamp 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 clamping mechanism, which is used to clamp the second end of the special-shaped steel wire; at least one folded weldment clamping mechanism, which is used to For pressing the folding weldment so that it can be overlapped with the spot welding part of the special-shaped steel wire, which is convenient for subsequent spot welding work; at least one spot welding clamping mechanism, which is used to press the spot welding part of the special-shaped steel wire; wherein, the first end clamping mechanism, the middle end clamping mechanism and the folding weldment clamping mechanism are located on the same side, and the folding weldment clamping mechanism is located in the middle of the first end clamping mechanism and the middle end clamping mechanism; the second end clamping mechanism and the spot welding clamping mechanism are located on the same side, and are arranged relative to the first end clamping mechanism, the middle end clamping mechanism and the folding weldment clamping mechanism.

[0007] Furthermore, the first end clamping 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 pad, which is mounted on the first end mounting plate; a first end clamping groove is provided on the first end pad; a first end telescopic cylinder, which is mounted on the first end mounting plate; a first end hinged 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 on the first end hinged block; a first end pressure block, which is mounted on the other end of the first end rotating plate; at least two first end locking blocks, which lock 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 clamping groove of the first end pad, and the first end pressure block presses the upper surface of the first end of the special-shaped steel wire; the positioning top block presses the edge of the first end of the special-shaped steel wire.

[0008] Furthermore, the intermediate end clamping mechanism includes: an intermediate end mounting rib plate; an intermediate end mounting plate, which is height-adjustably mounted on the intermediate end mounting rib plate; at least four intermediate end pads, which are respectively mounted on the intermediate end mounting plate; each of the intermediate end pads is provided with an intermediate end clamping groove; an intermediate end telescopic cylinder, which is mounted on the intermediate end mounting plate; an intermediate end hinged block, which is mounted on the telescopic end of the intermediate end telescopic cylinder; an intermediate end rotating plate, one end of which is hinged on the intermediate end hinged block; at least four intermediate end pressure blocks, which are respectively mounted on the other end of the intermediate end rotating plate; at least two intermediate end locking blocks, which lock the intermediate end rotating plate and the intermediate end mounting plate through locking bolts; wherein two places of the transverse rod of the special-shaped steel wire, one place of the folding 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 clamping grooves, and the four intermediate end pressure blocks respectively press the upper surface of the intermediate end of the special-shaped steel wire.

[0009] Furthermore, the second end clamping 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 pads, which are respectively mounted on the second end mounting plates; each of the second end pads is provided with a second end clamping groove; 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 on the second end hinge block; at least two second end pressure blocks, which are respectively mounted on the other end of the second end rotating plate; at least two second end locking blocks, which lock 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 clamping grooves, and the two second end pressure blocks respectively press the upper surface of the second end of the special-shaped steel wire.

[0010] Furthermore, the folding weldment clamping mechanism includes: a folding weldment clamping mounting rib plate; a folding weldment clamping mounting plate, which is height-adjustable and mounted on the folding weldment clamping mounting rib plate; a folding weldment clamping top plate, which is mounted on the folding weldment clamping mounting plate and forms a gap with the folding weldment clamping mounting plate; the folding weldment clamping top plate is provided with a stop block having an arc-shaped groove; a first folding weldment clamping telescopic cylinder, which is mounted on the folding weldment clamping mounting plate; a first folding weldment clamping block, which is aligned with the first folding weldment clamping telescopic cylinder The telescopic ends are connected and are used to press the lower end of the folding weldment; the second folding weldment pressing telescopic cylinder is installed on the folding weldment pressing mounting plate; and is located above the first folding weldment pressing telescopic cylinder, and its telescopic direction is the same as the telescopic direction of the first folding weldment pressing telescopic cylinder; the second folding weldment pressing block is connected to the telescopic end of the second folding weldment pressing telescopic cylinder, and is used to press the middle end of the folding weldment; wherein one end of the folding weldment is located on the special-shaped steel wire; and the other end of the folding weldment is inserted into the support block with an arc groove.

[0011] Further, the spot welding clamping mechanism includes: a spot welding clamping mounting rib plate; a spot welding clamping mounting plate, which is height-adjustable and mounted on the spot welding clamping mounting rib plate; a spot welding clamping telescopic cylinder, which is mounted on the spot welding clamping mounting plate; a spot welding clamping hinge block, which is mounted on the telescopic end of the spot welding clamping telescopic cylinder; a spot welding clamping rotating plate, one end of which is hinged on the spot welding clamping hinge block; at least two spot welding locking blocks, which lock the spot welding clamping rotating plate and the spot welding clamping mounting plate through locking bolts; an adjustable spot welding upper clamping block mechanism, which is mounted on the other end of the spot welding clamping rotating plate; The adjustable spot welding lower pressing block mechanism is located below the adjustable spot welding upper pressing block mechanism; wherein the special-shaped steel wire and the folded weldment are stacked between the adjustable spot welding upper pressing block mechanism and the adjustable spot welding lower pressing block mechanism.

[0012] Furthermore, the adjustable spot welding upper pressure block mechanism includes: an upper adjusting box body, which is installed on the other end of the spot welding pressing rotating plate; at least one upper telescopic adjusting column, which is inserted in the upper adjusting box body; an upper fixed plate, which is installed on one end of the upper telescopic adjusting column; and the upper fixed plate is pressed onto the upper adjusting box body through the upper pressure folding plate; an upper adjusting plate, which is installed on the other end of the upper telescopic adjusting column; an upper adjusting spring, which is sleeved on the upper telescopic adjusting column through a clamping ring; an upper spot welding connecting block, one end of which is installed on the upper adjusting plate; an upper spot welding connecting column, which is located on the other end of the upper spot welding connecting block; an upper spot welding sheet, which is located on the lower surface of the other end of the upper spot welding connecting block, and is connected to the upper spot welding connecting column; an upper circulation cooling pipe inlet; an upper circulation cooling pipe outlet; wherein, the upper circulation cooling pipe inlet and the upper circulation cooling pipe outlet are connected through a U-shaped circulation pipe opened in the upper spot welding connecting block.

[0013] The cam is an adjustable spaceship, and the cam is a spaceship that is fixed on the side surface of the first end clamping mechanism. The cam is installed in the spaceship, and the cam is connected with the lower frame by the fixing plate. The cam is fixed on the side surface of the first end clamping mechanism, and the fixing plate is installed in the spaceship ...

[0014] In order to achieve the above-mentioned purpose, 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 clamping structures, and the device also includes: a base, a robotic arm spot welding mechanism and an electrical box; wherein, when the number of the spot welding positioning and clamping structures is two, the spot welding positioning and clamping structures are symmetrically arranged and fixedly installed on the base; the robotic arm spot welding mechanism is installed on the top of the equipment by rotating the robotic arm; when it is necessary to weld special-shaped steel wires and folded weldments, the upper spot welding pole of the robotic arm spot welding mechanism is fitted with the upper spot welding sheet; the lower spot welding pole of the robotic arm spot welding mechanism is fitted with the lower spot welding sheet.

[0015] In order to achieve the above object, the present invention provides another technical solution as follows: a spot welding method, which is applicable to the above spot welding equipment, and comprises: S1. Place the special-shaped steel wire in the first end pressing groove, the middle end pressing groove and the second end pressing groove by a mechanical grabbing device; S2, open the first end telescopic cylinder, the middle end telescopic cylinder and the second end telescopic cylinder, and press the special-shaped steel wire into the first end pressing groove, the middle end pressing groove and the second end pressing groove; S3, placing the end of the folded weldment to be welded on the special-shaped steel wire by a mechanical grabbing device, inserting the other end of the folded weldment into a stop block with an arc-shaped groove, and the folded weldment and the special-shaped steel wire are perpendicular to each other; S4, opening the first folding weldment pressing telescopic cylinder and the second folding weldment pressing telescopic cylinder to press the other end of the folding weldment; S5, open the spot welding compression telescopic cylinder to compress the end of the folded weldment to be welded and the end of the special-shaped steel wire to be welded; wherein the upper spot welding piece is fitted with the end of the folded weldment to be welded, and the lower spot welding piece is fitted with the end of the special-shaped steel wire to be welded; S6, the mechanical arm type spot welding mechanism reaches the welding position by rotating the mechanical arm, and the upper spot welding pole of the mechanical arm type spot welding mechanism is fitted with the upper spot welding sheet; the lower spot welding pole of the mechanical arm type spot welding mechanism is fitted with the lower spot welding sheet; S7, open the upper spot welding pole and the lower spot welding pole of the mechanical arm spot welding mechanism, press the upper spot welding pole downward, and then use the adjustable spot welding upper pressing block mechanism and the adjustable spot welding lower pressing block mechanism to make the upper spot welding piece and the end to be welded of the folded weldment fit tightly, and the lower spot welding piece and the end to be welded of the special-shaped steel wire fit tightly, to complete the spot welding; S8. After the spot welding is completed, the robotic arm spot welding mechanism releases the upper spot welding electrode and the lower spot welding electrode, moves to the next welding station, and repeats S1-S7.

[0016] In the above technical scheme, the present invention uses a mechanical grasping device, so that the special-shaped steel wire and the folded weldment can be accurately placed in the specified position. The mechanical grasping device can accurately place the special-shaped steel wire in the first end clamping groove, the middle end clamping groove and the second end clamping groove according to the preset program and the precise positioning system, and accurately place the end to be welded of the folded weldment on the special-shaped steel wire, and insert the other end of the folded weldment into the block with the arc groove, while ensuring that the folded weldment and the special-shaped steel 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 be caused by manual operation, thereby improving the accuracy of welding.

[0017] The special-shaped steel wire and folded weldment are pressed separately by multiple telescopic cylinders. These cylinders can provide stable and uniform pressure to keep the special-shaped steel wire and folded weldment in close fit during the welding process, ensuring that the welding current can pass through the welding part evenly, thereby improving the welding quality and reducing the occurrence of welding defects such as cold welding and desoldering.

[0018] The adjustable spot welding upper clamp mechanism and the adjustable spot welding lower clamp mechanism cooperate with the upper spot welding pole and the lower spot welding pole of the mechanical arm spot welding mechanism to make the upper spot welding piece and the end to be welded of the folded weldment and the lower spot welding piece and the end to be welded of the special-shaped steel wire fit tightly. This tight fit helps to improve the current conduction efficiency, so that the welding part can quickly heat up and reach the ideal welding state, further improving the welding quality.

[0019] Automated operation reduces the reliance on manual labor and reduces labor costs. At the same time, automated equipment can achieve 24-hour continuous operation, further improving production efficiency and reducing the production cost per unit product. As welding accuracy and quality are improved, the product qualification rate is also improved accordingly. Product scrapping and rework caused by welding defects are reduced, reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of the spot welding equipment of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the spot welding positioning and clamping structure of the present invention.

[0023] Figure 3 It is a top view of the spot welding positioning and clamping structure of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the first end clamping mechanism of the present invention.

[0025] Figure 5 It is a schematic structural diagram of the first end pad of the present invention.

[0026] Figure 6 It is a structural schematic diagram of the middle end clamping mechanism of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the second end clamping mechanism of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the folding weldment clamping mechanism of the present invention.

[0029] Fig. 9 It is a side view of the folding weldment clamping mechanism of the present invention.

[0030] Fig.10 It is a structural schematic diagram of the spot welding clamping mechanism of the present invention.

[0031] Fig.11 It is a structural schematic diagram of the adjustable spot welding upper pressing block mechanism of the present invention.

[0032] Fig.12 It is a structural schematic diagram of the adjustable spot welding lower pressing block mechanism of the present invention.

[0033] Fig.13 It is a three-dimensional diagram of the adjustable spot welding lower pressing block mechanism of the present invention.

[0034] Fig.14 It is a schematic diagram of the positions of the special-shaped steel wire and the folded weldment during spot welding of the present invention.

[0035] Description of reference numerals: 1. First end clamping mechanism; 101. First end mounting rib plate; 102. First end mounting plate; 103. Positioning top block; 104. First end pad; 105. First end clamping groove; 106. First end telescopic cylinder; 107. First end hinge block; 108. First end rotating plate; 109. First end clamping block; 110. First end locking block; 2. Middle end clamping mechanism; 201. Middle end mounting rib plate; 202. Middle end mounting plate; 203. Middle end pad; 204. Middle end clamping groove; 205. Middle end telescopic cylinder; 206. Middle end hinge block; 207. Middle end rotating plate Rotating plate; 208, middle end pressure block; 209, middle end locking block; 3, second end pressure mechanism; 301, second end mounting rib plate; 302, second end mounting plate; 303, second end pad; 304, second end pressure groove; 305, second end telescopic cylinder; 306, second end hinge block; 307, second end rotating plate; 308, second end pressure block; 309, second end locking block; 4, folding weldment pressure mechanism; 401, folding weldment pressure mounting rib plate; 402, folding weldment pressure mounting plate; 403, folding weldment pressure top plate; 404, block with arc groove; 405, first folding weldment Clamping telescopic cylinder; 406, first folding weldment clamping block; 407, second folding weldment clamping telescopic cylinder; 408, second folding weldment clamping block; 5, spot welding clamping mechanism; 501, spot welding clamping mounting rib plate; 502, spot welding clamping mounting plate; 503, spot welding clamping telescopic cylinder; 504, spot welding clamping hinge block; 505, spot welding clamping rotating plate; 506, spot welding locking block; 507, adjustable spot welding upper clamping block mechanism; 5071, upper adjustment box; 5072, upper telescopic adjustment column; 5073, upper fixed plate; 5074, upper folding plate; 5075, upper adjustment plate; 5076, upper adjustment spring; 5077, upper spot welding Connecting block; 5078, upper spot welding connecting column; 5079, upper spot welding piece; 50710, upper circulation cooling pipe inlet; 50711, upper circulation cooling pipe outlet; 508, adjustable spot welding lower pressure block mechanism; 5081, lower adjustment box; 5082, lower telescopic adjustment column; 5083, lower fixed plate; 5084, lower pressure folding plate; 5085, lower adjustment plate; 5086, lower adjustment spring; 5087, lower spot welding connecting block; 5088, lower spot welding connecting column; 5089, lower spot welding piece; 50810, lower circulation cooling pipe inlet; 50811, lower circulation cooling pipe outlet; 6, base; 7, mechanical arm spot welding mechanism; 8, electrical box. DETAILED DESCRIPTION

[0036] 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 described in detail below with reference to the accompanying drawings.

[0037] Example 1 according to Figure 2 and Fig.14 As shown, the spot welding positioning and clamping structure is used in the spot welding process of special-shaped steel wires and folded weldments, and the structure includes: according to Figure 4-Figure 5 As shown, at least one first end clamping mechanism 1 is used to clamp the first end of the special-shaped steel wire.

[0038] Furthermore, the first end clamping mechanism 1 includes: a first end mounting rib plate 101. Specifically, the first end clamping mechanism 1 uses the first end mounting rib plate 101 as a basic support structure. During the entire spot welding process, it can provide a stable support platform for other components to ensure that the entire mechanism remains stable and reliable when subjected to greater pressure.

[0039] The first end mounting plate 102 is height-adjustably mounted on the first end mounting rib 101. Specifically, this height adjustment function is achieved through a threaded adjustment device, and the staff only needs to simply rotate the adjustment bolt to accurately position the first end mounting plate 102 according to the actual height of the special-shaped steel wire. Whether it is a large-sized industrial special-shaped steel wire or a small-sized special-shaped steel wire with a delicate size, the mechanism can adapt to the steel wire through this design, greatly improving the versatility of the mechanism.

[0040] 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, and effectively limit the displacement of the special-shaped steel wire in the horizontal direction by means of physical blocking, ensuring that the steel wire always remains in a preset position during the spot welding process, thereby providing a guarantee for the accuracy of welding.

[0041] The first end pad 104 is mounted on the first end mounting plate 102; the first end pad 104 is provided with a first end clamping groove 105. Specifically, the shape of the first end clamping groove 105 matches the cross-sectional shape of the special-shaped steel wire, thereby enhancing the positioning effect of the steel wire and buffering the clamping force to a certain extent to prevent the steel wire from being deformed due to excessive pressure.

[0042] The first end telescopic cylinder 106 is mounted on the first end mounting plate 102. Specifically, by controlling the inflow and outflow of compressed air, the first end telescopic cylinder 106 can achieve fast and stable telescopic movement. When the special-shaped steel wire needs to be compressed, the cylinder extends to push the first end hinge block 107 connected thereto to move.

[0043] 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 adopts a spherical hinge design, which can not only transmit the power of the first end telescopic cylinder 106, but also allow the first end rotating plate 108 to rotate flexibly within a certain range, which facilitates the smooth performance of the pressing action.

[0044] One end of the first end rotating plate 108 is hinged on the first end hinge block 107. Specifically, in actual operation, after completing the positioning and pressing of the special-shaped steel wire, the staff only needs to tighten the locking bolt to keep the first end rotating plate 108 in a stable state, so as to avoid changes in the pressing force due to vibration or other external factors during the spot welding process, thereby affecting the welding quality.

[0045] The first end pressing block 109 is installed on the other end of the first end rotating plate 108. Specifically, during installation, the staff can flexibly adjust the installation angle and position of the first end pressing block 109 according to the actual spot welding requirements, thereby ensuring that when the special-shaped steel wire is compressed, the first end pressing block 109 is always perpendicular to the upper surface of the steel wire to obtain the best compression effect.

[0046] In addition, a shock-absorbing buffer pad is provided at the connection between the first end pressing 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 pressing block to be pressed downward, which not only protects the first end pressing block 109 and the special-shaped steel wire, but also extends the overall service life of the equipment.

[0047] At least two first end locking blocks 110 are used to lock the first end rotating plate 108 and the first end mounting plate 102 through locking bolts. Specifically, in the actual operation, after the staff has completed the positioning and pressing of the special-shaped steel wire, they can use a special torque wrench to tighten the locking bolts in sequence according to the preset torque value. This can ensure that the force applied by each locking bolt is uniform and consistent, preventing the first end rotating plate 108 from tilting due to uneven force, and can also ensure that the connection between the first end rotating plate 108 and the first end mounting plate 102 reaches the best tightening state.

[0048] The first end of the 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 shaped steel wire; the positioning top block 103 presses the edge of the first end of the shaped steel wire. Specifically, when the spot welding process is carried out, the first end of the shaped steel wire (i.e. Fig.14The middle pressing part A) will be precisely placed in the first end pressing groove 105 of the first end pad 104. The design of the first end pressing groove 105 has been carefully considered, and its shape is highly consistent with the cross-sectional profile of the special-shaped steel wire, just like tailoring, so that the special-shaped steel wire can be naturally embedded in it and fit closely with the groove wall, which limits the displacement of the steel wire in the horizontal and vertical directions to the greatest extent, providing a stable foundation for subsequent pressing and welding work.

[0049] At the same time, the first end telescopic cylinder 106 extends the piston rod under the command of the control system, driving the first end hinge block 107 to move forward. In this process, the first end rotating plate 108 rotates with its hinge point with the first end hinge block 107 as the axis, and the first end pressing block 109 installed at the other end thereof moves downward until it is in full contact with the upper surface of the first end of the special-shaped steel wire. The bottom surface of the first end pressing block 109 is specially treated, not only with appropriate roughness, but also can significantly enhance the friction between the steel wire and prevent the steel wire from sliding during welding. Its design of fitting the surface of the special-shaped steel wire ensures uniform pressure distribution and avoids excessive local pressure that causes deformation of the steel wire.

[0050] In addition, the positioning top block 103 is installed on the first end mounting plate 102, and its position and angle are precisely adjusted so that it can just support the edge of the first end of the special-shaped steel wire after the special-shaped steel wire is in place. The positioning top block 103 further limits the horizontal displacement of the special-shaped steel wire by physical blocking, especially the small displacement caused by factors such as current impact and mechanical vibration during spot welding, ensuring that the special-shaped steel wire is always in the preset welding position, ensuring the accuracy and consistency of welding, and creating favorable conditions for forming high-quality welding points between the special-shaped steel wire and the folded weldment.

[0051] according to Figure 6 As shown, the structure further includes: at least one intermediate end clamping mechanism 2, which is used to clamp 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; Furthermore, the middle end clamping mechanism 2 includes: a middle end mounting rib plate 201. Specifically, the middle end mounting rib plate 201 provides a stable mounting base for other components; the surface of the middle end mounting rib plate 201 is anodized, which not only enhances its wear resistance, but also improves its corrosion resistance and prolongs the service life of the equipment.

[0052] The middle end mounting plate 202 is height-adjustably mounted on the middle end mounting rib 201. 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 special-shaped steel wire. Whether it is a large-sized industrial special-shaped steel wire or a small-sized special-shaped steel wire with a delicate size, the mechanism can adapt to the steel wire through this design, greatly improving the versatility of the mechanism.

[0053] At least four middle end pads 203 are respectively mounted on the middle end mounting plate 202; each of the middle end pads 203 is provided with a middle end clamping groove 204. Specifically, the shape and size of each middle end clamping groove 204 are specially designed according to different parts of the special-shaped steel wire, and can be closely fitted with the surface of the transverse rod, the folding rod and the vertical rod, providing stable support and positioning for the special-shaped steel wire.

[0054] 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 smooth telescopic movement by controlling the inlet and outlet of compressed air. During operation, when the control system issues a clamping command, compressed air enters the rodless chamber of the cylinder, pushing the piston and the piston rod to extend, thereby driving the middle end hinge block 206 connected thereto to move.

[0055] 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 the surface is carburized, which has good wear resistance and fatigue resistance. The design of the middle end hinge block 206 adopts 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 performance of the pressing action.

[0056] The middle end rotating plate 207 has one end hinged on 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 with its 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 the compression of the special-shaped steel wire.

[0057] At least four middle end pressing blocks 208 are respectively mounted on the other end of the middle end rotating plate 207 .

[0058] Specifically, at least four intermediate end blocks 208 are made of special alloy steel, and the surface is nitrided to have good hardness and wear resistance. The bottom surface of each intermediate end block 208 is specially designed according to different parts of the special-shaped steel wire, and can fit closely with the upper surface of the transverse rod, folding rod and vertical rod, ensuring that the pressure is evenly distributed during the compression process, and avoiding deformation of the steel wire due to excessive local pressure.

[0059] At least two middle end locking blocks 209 are used to lock the middle end rotating plate 207 and the middle end mounting plate 202 through locking bolts. Specifically, in the actual operation, after the staff has completed the positioning and pressing of the special-shaped steel wire, they can use a special torque wrench to tighten the locking bolts in sequence according to the preset torque value. This can ensure that the force applied by each locking bolt is uniform and consistent, preventing the middle end rotating plate 207 from tilting due to uneven force, and can also ensure that the connection between the middle end rotating plate 207 and the middle end mounting plate 202 reaches the best tightening state.

[0060] Among them, the two places of the transverse rod of the special-shaped steel wire (i.e. Fig.14 The middle compression point B and the compression point C), the folding rod of the special-shaped steel wire (i.e. Fig.14 The middle compression point D) and one of the vertical rods of the special-shaped steel wire (i.e. Fig.14 The middle pressing points (F) are respectively located in the corresponding middle end pressing grooves 204, and the four middle end pressing blocks 208 respectively press the upper surface of the middle end of the special-shaped steel wire. Specifically, in 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 special-shaped steel wire will be accurately placed in the corresponding middle end pressing grooves 204. When the middle end telescopic cylinder 205 extends the piston rod and drives the middle end rotating plate 207 to rotate, the four middle end pressing blocks 208 will move downward accordingly and respectively press the upper surface of the middle end of the special-shaped steel wire. At the same time, by tightening the locking bolts on the middle end locking block 209, the middle end rotating plate 207 and the middle end mounting rib plate 201 are firmly locked to ensure that the special-shaped steel wire always remains stable during the spot welding process, providing reliable guarantee for achieving high-quality welding.

[0061] The structure also includes: at least one second end clamping mechanism 3, which is used to clamp the second end of the special-shaped steel wire.

[0062] according to Figure 7As shown, further, the second end clamping mechanism 3 includes: a second end mounting rib 301. Specifically, the second end mounting rib 301 is made of high-strength aluminum alloy. This material not only has good mechanical strength and can provide a stable installation foundation for other components, but also has a light weight, which helps to reduce the weight of the entire mechanism and reduce energy consumption during the operation of the equipment. The surface of the second end mounting rib 301 is anodized, which not only enhances its wear resistance, but also improves its corrosion resistance and prolongs the service life of the equipment.

[0063] The second end mounting plate 302 is height-adjustably mounted on the second end mounting rib 301. Specifically, this height adjustment function is achieved through a threaded adjustment device, and 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 special-shaped steel wire. Whether it is a large-sized industrial special-shaped steel wire or a small-sized special-shaped steel wire with a delicate size, this mechanism can adapt to the steel wire through this design, greatly improving the versatility of the mechanism.

[0064] At least two second end pads 303 are respectively mounted on the second end mounting plate 302; each of the second end pads 303 is provided with a second end clamping groove 304. Specifically, the second end pads 303 are made of a new type of polymer composite material, which not only has excellent wear resistance but also has a certain degree of flexibility. Each second end pad 303 is designed with a second end clamping groove 304, the shape and size of which are specially customized according to the contour of the second end of the special-shaped steel wire. When the special-shaped steel wire is in place, it can fit tightly, effectively limit the displacement of the steel wire in all directions, and provide a stable positioning basis for the subsequent clamping operation.

[0065] The second end telescopic cylinder 305 is mounted on the second end mounting plate 302. Specifically, the second end telescopic cylinder 305 adopts a double-acting piston structure, and can achieve fast and smooth telescopic movement by controlling the inflow and outflow of compressed air. During operation, when the control system issues a clamping command, compressed air enters the rodless chamber of the cylinder, pushing the piston and the piston rod to extend, thereby driving the second end hinge block 306 connected thereto to move.

[0066] The second end hinge block 306 is mounted on the telescopic end of the second end telescopic cylinder 305. Specifically, it is made of high-strength aluminum alloy and is hard anodized, 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 provide a flexible degree of rotation freedom for the second end rotating plate 307, so that it can smoothly complete the pressing action.

[0067] The second end rotating plate 307 has one end hinged on the second end hinge block 306. Specifically, the second end rotating plate 307 is made of a lightweight and high-strength titanium alloy, which effectively reduces the overall weight while ensuring the structural strength, and reduces the energy consumption of the equipment during operation. 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, thereby achieving the pressing operation of the second end of the special-shaped steel wire.

[0068] At least two second end pressing blocks 308 are respectively mounted on the other end of the second end rotating plate 307. Specifically, these pressing blocks are made of special alloy steel, and the surface undergoes a special heat treatment process, which greatly improves 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 steel wire to ensure that it can fully contact the surface of the steel wire during the pressing process, so that the pressure is evenly distributed and the deformation of the steel wire due to excessive local pressure is avoided.

[0069] At least two second end locking blocks 309 are used to lock the second end rotating plate 307 and the second end mounting plate 302 through locking bolts. Specifically, in order 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 301 through locking bolts. The second end locking block 309 is made of high-strength alloy steel, and the surface is galvanized, which has good anti-rust performance. In actual operation, after the staff completes the positioning and pressing of the special-shaped steel wire, they use a professional torque wrench to tighten the locking bolts according to the specified torque value, thereby ensuring that the second end rotating plate 307 always remains stable during the spot welding process.

[0070] Wherein, the second end portion (i.e. Fig.14 The second end clamping groove 304 and the second end clamping block 308 respectively clamp the upper surface of the second end of the special-shaped steel wire. Specifically, during the actual spot welding operation, the second end of the special-shaped steel wire will be accurately placed in the corresponding second end clamping groove 304. When the second end telescopic cylinder 305 is started and the second end rotating plate 307 is pushed to rotate, the two second end clamping blocks 308 move downward accordingly and respectively clamp the upper surface of the second end of the special-shaped steel wire. Next, the staff tightens the locking bolt on the second end locking block 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 steel wire remains stable throughout the spot welding process, providing a solid guarantee for achieving high-quality welding operations.

[0071] The structure also includes: at least one folded weldment pressing mechanism 4, which is used to press the folded weldment so that it can be stacked with the spot welding part of the special-shaped steel wire to facilitate subsequent spot welding work; according to Figure 8-Figure 9 As shown, further, the folding weldment pressing mechanism 4 includes: a folding weldment pressing and mounting rib plate 401. Specifically, the folding weldment pressing and mounting rib plate 401 is made of high-strength aluminum alloy. This material not only has good mechanical strength and can provide a stable installation foundation for other components, but also has a light weight, which helps to reduce the weight of the entire mechanism and reduce energy consumption during equipment operation. The surface of the folding weldment pressing and mounting rib plate 401 is anodized, which not only enhances its wear resistance, but also improves its corrosion resistance and extends the service life of the equipment.

[0072] The folding weldment pressing and mounting plate 402 is height-adjustably mounted on the folding weldment pressing and mounting rib plate 401. 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 folding weldment pressing and mounting plate 402 according to the actual height of the special-shaped steel wire. Whether it is a large-sized industrial special-shaped steel wire or a small-sized special-shaped steel wire with a delicate size, the mechanism can adapt to the steel wire through this design, greatly improving the versatility of the mechanism.

[0073] The folding weldment pressing top plate 403 is installed on the folding weldment pressing mounting plate 402 and forms a gap between the folding weldment pressing mounting plate 402; the folding weldment pressing top plate 403 is provided with a stop block 404 having an arc groove.

[0074] Specifically, a carefully designed stop block 404 with an arc-shaped groove is provided on the folding weldment pressing top plate 403. The curvature radius of the stop block 404 with the arc-shaped groove is specially customized according to the end shape of the folding weldment. When one end of the folding weldment is inserted into the stop block 404 with the arc-shaped groove, the two can fit tightly, limiting the weldment from the side and top to prevent the weldment from shaking or displacement during the welding process.

[0075] The first folding weldment pressing telescopic cylinder 405 is installed on the folding weldment pressing mounting plate 402. Specifically, the cylinder adopts a double-acting piston structure, and when working, it controls the inlet and outlet of compressed air to push the piston to drive the piston rod to make reciprocating linear motion. Before the spot welding operation, when the control system issues a pressing command, the compressed air enters the rodless cavity of the cylinder, and the piston rod extends, driving the first folding weldment pressing block 406 connected thereto to move toward the lower end of the folding weldment until the weldment is pressed.

[0076] The first folding weldment clamping block 406 is connected to the telescopic end of the first folding weldment clamping telescopic cylinder 405, and is used to clamp the lower end of the folding weldment. Specifically, the material of the first folding weldment clamping block 406 is polyurethane rubber with good wear resistance and buffering properties. This material can not only provide reliable friction for the folding weldment during the clamping process to prevent the weldment from sliding, but also avoid damage to the weldment surface due to rigid extrusion. The clamping surface of the first folding weldment clamping block 406 is specially designed, and its shape matches the contour of the lower end of the folding weldment to ensure that the pressure is evenly distributed during clamping.

[0077] The second folding weldment pressing telescopic cylinder 407 is installed on the folding weldment pressing mounting plate 402 and is located above the first folding weldment pressing telescopic cylinder 405, and its telescopic direction is the same as that of the first folding weldment pressing telescopic cylinder 405. Specifically, the second folding weldment pressing telescopic cylinder 407 adopts the same technical specifications as the first folding weldment pressing telescopic cylinder 405, and the two work together to more comprehensively and stably press the folding weldment.

[0078] The second folding weldment pressing block 408 is connected to the telescopic end of the second folding weldment pressing telescopic cylinder 407, and is used to press the middle end of the folding weldment. Specifically, the second folding weldment pressing block 408 is also made of polyurethane rubber, and the shape of its pressing surface is optimized according to the shape of the middle part of the folding weldment, ensuring that during the pressing process, it can provide sufficient pressure for the weldment without causing damage to the weldment.

[0079] Among them, one end of the folding weldment is located on the special-shaped steel wire; the other end of the folding weldment is inserted into the block 404 with an arc-shaped groove. Specifically, during the actual spot welding operation, one end of the folding weldment is placed on the special-shaped steel wire and is ready to be welded with the steel wire. The other end is precisely inserted into the block 404 with an arc-shaped groove of the folding weldment pressing top plate 403. Subsequently, the first folding weldment pressing telescopic cylinder 405 and the second folding weldment pressing telescopic cylinder 407 are started at the same time, and the first folding weldment pressing block 406 and the second folding weldment pressing block 408 respectively move to the lower end and the middle end of the folding weldment to firmly press the weldment. Through this multi-position coordinated pressing method, the folding weldment always remains stable during the spot welding process, greatly improving the welding quality and production efficiency.

[0080] according to Figure 10-13 As shown, the structure further comprises at least one spot welding clamping mechanism 5, which is used to clamp the spot welding portion of the special-shaped steel wire.

[0081] Furthermore, the spot welding clamping mechanism 5 includes: a spot welding clamping mounting rib 501. Specifically, the spot welding clamping mounting rib 501 is made of high-strength and high-toughness alloy steel. This material not only has excellent compression and deformation resistance, and can maintain a stable structural form under long-term high pressure, but also has good processing performance, which is convenient for accurate processing of various installation holes and positioning surfaces. During the manufacturing process, the spot welding clamping mounting rib 501 has undergone multiple fine processing steps, and the surface flatness is extremely high, ensuring the accuracy and stability of subsequent component installation.

[0082] The spot welding clamping mounting plate 502 is mounted on the spot welding clamping mounting rib plate 501 in an adjustable height.

[0083] 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 clamping mounting plate 502 according to the actual height of the special-shaped steel wire. Whether it is a large-sized industrial special-shaped steel wire or a small-sized special-shaped steel wire with a delicate size, the mechanism can adapt to the steel wire through this design, greatly improving the versatility of the mechanism.

[0084] The spot welding clamping telescopic cylinder 503 is mounted on the spot welding clamping mounting plate 502. Specifically, the spot welding clamping 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 a smooth movement. During operation, when the control system issues a clamping command, compressed air enters the air cavity of the cylinder, and the gas pressure is converted into the pressure of the hydraulic oil through the gas-liquid conversion device, pushing the piston rod to extend quickly, driving the spot welding clamping hinge block 504 to move.

[0085] The spot welding clamping hinge block 504 is installed on the telescopic end of the spot welding clamping telescopic cylinder 503. Specifically, the spot welding clamping hinge block 504 is made of high-strength aluminum alloy and is anodized, which not only reduces its own weight but also improves the hardness and wear resistance of the surface. The spot welding clamping hinge block 504 adopts a unique universal hinge design, which can not only effectively transmit the driving force of the spot welding clamping telescopic cylinder 503, but also provide the spot welding clamping rotating plate 505 with rotational freedom in multiple directions, so that it can flexibly adjust its position to meet different spot welding requirements.

[0086] The spot welding clamping rotating plate 505 has one end hinged on the spot welding clamping hinge block 504. Specifically, the spot welding clamping rotating plate 505 is made of high-strength carbon fiber composite material, which has the advantages of light weight, high strength, and corrosion resistance. While ensuring the structural strength of the mechanism, it effectively reduces the overall weight and reduces the energy consumption during the operation of the equipment. Driven by the spot welding clamping telescopic cylinder 503, the spot welding clamping rotating plate 505 rotates around the hinge point, driving the adjustable spot welding upper clamping block mechanism 507 to approach the adjustable spot welding lower clamping block mechanism 508, thereby achieving the clamping of special-shaped steel wires and folded weldments.

[0087] At least two spot welding locking blocks 506 are used to lock the spot welding clamping rotating plate 505 and the spot welding clamping mounting plate 502 through locking bolts. Specifically, in actual operation, after the operator completes the positioning and clamping of the special-shaped steel wire and the folded weldment, the locking bolts are tightened according to the preset torque value using a special torque wrench to ensure that the spot welding clamping rotating plate 505 remains stable during the spot welding process and will not loosen due to vibration or other external forces.

[0088] 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. 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 the stable pressing of the welding part is achieved through the synergistic effect of the two.

[0089] Wherein, the special-shaped steel wire and the folding 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 the actual spot welding operation, firstly, according to the size and shape of the special-shaped steel wire and the folding weldment, the height of the spot welding pressing mounting plate 502 is adjusted by the screw nut lifting system, and the mechanism is adjusted to a suitable position. Then the special-shaped steel wire and the folding 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 performed. Then, the spot welding pressing telescopic cylinder 503 is started, and the spot welding pressing rotating plate 505 is pushed to rotate, so that the adjustable spot welding upper pressing block mechanism 507 gradually approaches the adjustable spot welding lower pressing block mechanism 508, and the special-shaped steel wire and the folding weldment are pressed. Finally, the spot welding clamping rotating plate 505 is fixed by tightening the locking bolts on the spot welding locking block 506, ensuring 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 operations.

[0090] Furthermore, the adjustable spot welding upper pressure block mechanism 507 includes: an upper adjustment box 5071, which is installed on the other end of the spot welding clamping rotating plate 505. Specifically, the upper adjustment box 5071 is made of aluminum alloy and is tightly installed on the other end of the spot welding clamping rotating plate 505 through high-strength bolts. The aluminum alloy material is not only light in weight, which can reduce the load of the entire mechanism and facilitate the operation of the equipment, but also has excellent heat dissipation performance, which can quickly dissipate the heat generated during the spot welding process and avoid damage to the components due to overheating. Its internal structure has been carefully designed and is equipped with multiple precisely positioned slots to provide stable support for the installation of the upper telescopic adjustment column 5072, ensuring the accurate installation position of each component and ensuring the normal operation of the mechanism.

[0091] At least one upper telescopic adjustment column 5072 is inserted into the upper adjustment box 5071. Specifically, these adjustment columns are made of high-carbon steel, which has been quenched and tempered, with high surface hardness, strong wear resistance and fatigue resistance. Their outer walls are engraved with precise scales, and the operator can intuitively understand the telescopic length of the adjustment column through the scales, so as to make precise adjustments. At the same time, the adjustment column and the slot of the upper adjustment box 5071 are matched with clearance, which can not only ensure the free extension and retraction of the adjustment column, but also ensure that it remains stable after being adjusted to avoid shaking.

[0092] The upper fixed plate 5073 is mounted on one end of the upper telescopic adjustment column 5072; and the upper fixed plate 5073 is pressed onto the upper adjustment box 5071 through the upper pressure folding plate 5074. Specifically, the upper fixed plate 5073 is mounted on one end of the upper telescopic adjustment column 5072, and is made of stainless steel, having good rigidity and corrosion resistance. It is pressed onto the upper adjustment box 5071 through the upper pressure folding plate 5074. The upper pressure folding plate 5074 is made of high-strength spring steel, and uses its own elastic deformation to tightly press the upper fixed plate 5073 to ensure that it fits tightly with the upper adjustment box 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 degree of compression of the upper pressure folding plate 5074, thereby improving the flexibility of adjustment.

[0093] The upper adjustment plate 5075 is mounted on the other end of the upper telescopic adjustment column 5072. Specifically, the upper adjustment plate 5075 is mounted on the other end of the upper telescopic adjustment column 5072 and is made of engineering plastic. This material has good insulation and certain flexibility, which can not only prevent current leakage and ensure operational 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 textures, which increases the friction between the upper spot welding connection block 5077 and prevents displacement during the adjustment process.

[0094] The upper adjustment spring 5076 is mounted on the upper telescopic adjustment column 5072 through a clamping ring. Specifically, the upper adjustment 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 sheet 5079 always maintains a stable pressure contact with the welding part. When the pressure is too high, the spring will compress and buffer the pressure; when the pressure decreases, the spring will stretch to maintain the necessary clamping force, thereby ensuring the stability of the welding quality.

[0095] The upper spot welding connection block 5077 is installed on the upper adjustment plate 5075 at one end. The upper spot welding connection column 5078 is located on 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 adjustment plate 5075, and is made of a copper alloy with good electrical conductivity, which can effectively conduct spot welding current. The other end is provided with an upper spot welding connection column 5078, which 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, is connected to the upper spot welding connection column 5078, and directly contacts the welding part. The upper spot welding piece 5079 is made of high temperature resistant and wear resistant alloy material. The surface is specially treated and has good electrical conductivity and thermal conductivity. It can ensure the spot welding effect while bearing high temperature and pressure.

[0096] Upper circulation cooling pipe inlet 50710; upper circulation cooling pipe outlet 50711. Among them, the upper circulation cooling pipe inlet 50710 and the upper circulation cooling pipe outlet 50711 are connected through a U-shaped circulation pipe opened in the upper spot welding connection block 5077. Specifically, the upper circulation cooling pipe inlet 50710 and the upper circulation cooling pipe outlet 50711 are connected through a U-shaped circulation pipe opened in the upper spot welding connection block 5077. The upper circulation cooling pipe inlet 50710 and the upper circulation cooling pipe outlet 50711 are made of stainless steel pipes, which have good corrosion resistance and pressure resistance. The U-shaped circulation pipe is designed with full consideration of the resistance of water flow and the heat dissipation efficiency. The circulating coolant takes away a large amount of heat generated during the spot welding process, effectively reduces the temperature of the upper spot welding piece 5079 and the welding part, prevents deformation and oxidation of the welding point due to overheating, extends the service life of the upper spot welding piece 5079, and improves the stability of welding quality.

[0097] Furthermore, the adjustable spot welding lower pressing block mechanism 508 comprises: a lower adjusting box 5081, which is fixedly mounted on the side surface of the first end clamping mechanism 1. Specifically, the lower adjusting box 5081 is made of aluminum alloy, and is fixedly mounted on the side surface of the first end clamping mechanism 1 by a plurality of high-strength bolts. The installation process is precisely measured and calibrated to ensure that the lower adjusting box 5081 maintains a good relative position relationship with other components of the entire spot welding system. The interior thereof is designed with a precise guide groove, which provides accurate guidance for the insertion and movement of the lower telescopic adjusting column 5082, and ensures the accuracy and stability of the adjustment.

[0098] At least one lower telescopic adjustment column 5082 is inserted into the lower adjustment box 5081. Specifically, the lower telescopic adjustment column 5082 is precisely inserted into the lower adjustment box 5081, and the matching clearance between the lower telescopic adjustment column 5082 and the guide groove is extremely small to ensure that there will be no shaking or deviation during the telescopic process. The outer wall of the lower telescopic adjustment column 5082 is engraved with clear scales, and the operator can accurately 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 piece 5089.

[0099] The lower fixed plate 5083 is mounted on one end of the lower telescopic adjustment column 5082; and the lower fixed plate 5083 is pressed onto the lower adjustment box 5081 through the lower pressing folding plate 5084. Specifically, the lower fixed plate 5083 is pressed onto the lower adjustment box 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 fixed plate 5083 on the lower adjustment box 5081. At the same time, this press-fitting method also allows the position of the lower telescopic adjustment column 5082 to be fine-tuned when necessary to accommodate weldments of different specifications.

[0100] The lower adjustment plate 5085 is mounted on the other end of the lower telescopic adjustment column 5082. Specifically, the lower adjustment plate 5085 is mounted on the other end of the lower telescopic adjustment column 5082 and is made of aluminum alloy, which is light and has good heat dissipation performance. Its surface has been specially treated to have high flatness and finish, and can fit closely with the lower spot welding connection block 5087 to ensure uniform force transmission. The lower adjustment plate 5085 is also provided with a plurality of positioning holes for accurately installing the lower spot welding connection block 5087 to ensure the position accuracy of the lower spot welding sheet 5089.

[0101] The lower adjustment spring 5086 is sleeved on the lower telescopic adjustment column 5082 through a snap ring. Specifically, the lower adjustment spring 5086 is sleeved on the lower telescopic adjustment column 5082 through a snap ring, and is made of high-quality spring steel, with a precise elastic coefficient and good fatigue performance. During the spot welding process, the lower adjustment 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 adjustment spring 5086 will be compressed, generating a reverse elastic force, so that the lower spot welding sheet 5089 can be closely in contact with the weldment, while avoiding damage to the weldment caused by excessive pressure.

[0102] The lower spot welding connection block 5087 is mounted on the lower adjustment plate 5085 at one end. The lower spot welding connection column 5088 is located on 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 mounted on the lower adjustment plate 5085 and is made of a highly conductive copper alloy, which can effectively conduct the spot welding current. Its internal structure is optimized and designed 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 high temperature resistant and wear resistant alloy material, and the surface has been specially hardened. It can maintain good performance in high temperature and high pressure spot welding environment, ensuring the stability of welding quality.

[0103] Lower circulation cooling pipe inlet 50810; lower circulation cooling pipe outlet 50811; wherein, the lower circulation cooling pipe inlet 50810 and the lower circulation cooling pipe outlet 50811 are connected through a U-shaped circulation pipe opened in the lower spot welding connection block 5087. Specifically, the lower circulation cooling pipe inlet 50810 and the lower circulation cooling pipe outlet 50811 are connected through a U-shaped circulation pipe opened in the lower spot welding connection block 5087. The lower circulation cooling pipe inlet 50810 and the lower circulation cooling pipe outlet 50811 are made of stainless steel pipes, which have good corrosion resistance and sealing properties. The design of the U-shaped circulation pipe allows the coolant 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 coolant flows in from the lower circulation cooling pipe inlet 50810, circulates in the U-shaped circulation pipe, and flows out from the lower circulation cooling pipe outlet 50811 after absorbing heat, effectively reducing the temperature of the lower spot welding connecting block 5087 and the lower spot welding piece 5089, extending their service life, and ensuring the stability and reliability of the spot welding process.

[0104] Among them, the first end clamping mechanism 1, the middle end clamping mechanism 2 and the folding weldment clamping mechanism 4 are located on the same side, and the folding weldment clamping mechanism 4 is located in the middle of the first end clamping mechanism 1 and the middle end clamping mechanism 2; the second end clamping mechanism 3 and the spot welding clamping mechanism 5 are located on the same side, and are arranged relative to the first end clamping mechanism 1, the middle end clamping mechanism 2 and the folding weldment clamping mechanism 4.

[0105] Example 2 according to Figure 1 As shown, the spot welding device includes at least one spot welding positioning and clamping structure described in the above-mentioned embodiment 1, and the device also includes: a base 6. Specifically, when the number of the spot welding positioning and clamping structures is two, they will be fixedly installed on the base 6 in a precise 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 clamping structure on the base 6 through multiple high-strength bolts to ensure that there will be no displacement or shaking during the welding process, thereby providing a solid foundation for the welding quality.

[0106] The device also includes: a robotic arm spot welding mechanism 7. Specifically, the robotic arm spot welding mechanism 7 is the core operating component of the device, which is installed on the top of the device through a rotating robotic arm. The rotating robotic arm adopts an advanced articulated design with multiple degrees of freedom, and can flexibly move and rotate in three-dimensional space. Each joint of the robotic arm is equipped with a high-precision servo motor and a reducer, which can achieve 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, and improves the flexibility and response speed of movement.

[0107] An upper spot welding pole and a lower spot welding pole are installed at the end of the mechanical arm type spot welding mechanism 7. When it is necessary to weld the special-shaped steel wire and the folded weldment, the mechanical arm type spot welding mechanism 7 will accurately move the upper spot welding pole to a position that fits with the upper spot welding sheet 5079 by rotating the mechanical arm according to the pre-set program, and move the lower spot welding pole to a position that fits with the lower spot welding sheet 5089. During the fitting process, the mechanical arm will monitor the fitting pressure in real time through the force sensor to ensure that the contact pressure between the upper spot welding pole and the upper spot welding sheet 5079, and the contact pressure between the lower spot welding pole and the lower spot welding sheet 5089 is uniform and moderate, thereby ensuring that the current can stably pass through the welding part to achieve high-quality welding.

[0108] Among them, when the number of spot welding positioning and clamping structures is two, the spot welding positioning and clamping structures are symmetrically arranged and fixedly installed on the base 6; the robotic arm spot welding mechanism 7 is installed on the top of the equipment by rotating the robotic arm; when it is necessary to weld special-shaped steel wires and folded weldments, the upper spot welding pole of the robotic arm spot welding mechanism 7 is fitted with the upper spot welding piece 5079; the lower spot welding pole of the robotic arm spot welding mechanism 7 is fitted with the lower spot welding piece 5089.

[0109] The device further includes an electrical box 8. Specifically, various electrical control components are installed inside the electrical 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 various components of the device.

[0110] In addition, the electrical 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 an abnormal situation occurs in the equipment to protect the safety of the equipment and operators.

[0111] In actual welding operation, the operator first places the special-shaped steel wire and the folding weldment in the corresponding position of the spot welding positioning and clamping structure, and accurately positions and firmly clamps them through the spot welding positioning and clamping structure. Then, the operator sends a welding instruction to the electrical box 8 through the operation panel, and after the electrical box 8 receives the instruction, it controls the mechanical arm type spot welding mechanism 7 to start the action. The mechanical arm type spot welding mechanism 7 moves the upper spot welding pole and the lower spot welding pole to the position that fits the upper spot welding sheet 5079 and the lower spot welding sheet 5089 respectively by rotating the mechanical arm, and the electrical box 8 controls the transformer to output a suitable welding current at the same time, and the current forms a loop through the upper spot welding pole, the upper spot welding sheet 5079, the special-shaped steel wire, the folding weldment, the lower spot welding sheet 5089 and the lower spot welding pole, generating resistance heat at the welding position, so that the contact points of the special-shaped steel wire and the folding weldment are quickly melted and fused together, completing the welding process. After welding is completed, the mechanical arm type spot welding mechanism 7 returns to the initial position, and the operator can take out the welded workpiece and carry out the next round of welding operation.

[0112] Example 3 A spot welding method, which is applicable to the spot welding equipment described in the above embodiment 2, comprising: S1. Place the special-shaped steel wire in the first end clamping groove 105, the middle end clamping groove 204 and the second end clamping groove 304 by a mechanical grasping device. Specifically, the shape and size of the special-shaped steel wire are accurately identified by using a mechanical grasping device equipped with a high-precision visual recognition system. The clamping claws of the mechanical grasping device are specially designed, and are inlaid with soft and non-slip rubber pads inside, which can firmly grasp the special-shaped steel wire without damaging its surface. According to the pre-set program, the mechanical grasping device moves accurately to the special-shaped steel wire storage area, and the clamping claws steadily grasp the special-shaped steel wire by fine-tuning the positioning. Subsequently, the mechanical grasping device transports the special-shaped steel wire to the top of the spot welding positioning and clamping 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 respectively placed in the first end clamping groove 105, the middle end clamping groove 204 and the second end clamping groove 304, so as to prepare for the subsequent clamping operation.

[0113] S101, through the position sensing sensors respectively embedded in the inner side surfaces of the first end clamping groove 105, the middle end clamping groove 204 and the second end clamping groove 304, it is possible to sequentially sense whether each part of the special-shaped steel wire is correctly located in the first end clamping groove 105, the middle end clamping groove 204 and the second end clamping groove 304. When each position sensing sensor senses that each part of the special-shaped steel wire is located in the first end clamping groove 105, the middle end clamping groove 204 and the second end clamping groove 304, then proceed to S2; otherwise, start the mechanical grasping device again to grasp the special-shaped steel wire and re-place it. Specifically, when the special-shaped steel wire is placed in the specified 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 is started 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.

[0114] If the information fed back by 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.

[0115] On the contrary, once any sensor reports that the position of the special-shaped steel wire is deviated, the control system will immediately send a command to the mechanical grabbing device to start the mechanical grabbing device again. The mechanical grabbing device operates accurately, quickly grabs the special-shaped steel wire, and re-places it according to the preset program. After that, the sensor will start testing 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.

[0116] S2, open the first end telescopic cylinder 106, the middle end telescopic cylinder 205 and the second end telescopic cylinder 305, and 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; S201. When the special-shaped steel wire is in place, the control system sends instructions 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 move, 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 is pressed, S202 is performed; otherwise, the first end telescopic cylinder 106 is controlled to lift the first end pressing block 109 and re-press the process. Specifically, the first pressure sensor uses the advanced piezoelectric effect principle to sensitively capture pressure changes. When the first end of the special-shaped steel wire is pressed, the surface of the pressure sensor will be subjected to pressure from the end of the steel wire. The sensor converts this pressure signal into an electrical signal and transmits it to the control system in real time, thereby sensing and feedback 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 standard. The control system makes accurate judgments and analyses based on the signal fed back by the sensor. If the pressing force does not meet the standard, it will issue further action instructions to the first end telescopic cylinder 106 to ensure that the special-shaped steel wire is stably and effectively pressed.

[0117] S202, the middle end telescopic cylinder 205 extends the piston rod, drives the middle end hinge block 206 and the middle end rotating plate 207 to rotate, and makes multiple middle end pressing blocks 208 press down at the same time, and stably press the corresponding parts of the transverse rod, folding rod and vertical rod of the special-shaped steel wire 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 performed; otherwise, the middle end telescopic cylinder 205 is controlled to lift multiple middle end pressing blocks 208 and re-press the 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 sensor surface. The sensor quickly senses this pressure change and converts it into an electrical signal to transmit to the control system. The control system accurately determines whether the second end of the special-shaped steel wire has been effectively pressed into the middle end pressing groove 204 based on the received signal.

[0118] 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. The second pressure sensor installed at the bottom of the second end pressing groove 304 senses and feedbacks whether the second end of the special-shaped steel wire is pressed into the second end pressing groove 304; if it is pressed, S3 is performed; otherwise, the second end telescopic cylinder 305 is controlled to lift multiple second end pressing blocks 308 and re-press the process.

[0119] At the same time, during this process, the pressure output of each cylinder is monitored and precisely controlled in real time to ensure that the special-shaped steel wire can be compressed evenly and stably in all parts.

[0120] S3, placing the end of the folded weldment to be welded on the special-shaped steel wire by a mechanical grabbing device, inserting the other end of the folded weldment into a stop block with an arc-shaped groove, and the folded weldment and the special-shaped steel wire are perpendicular to each other; 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 gripper of the mechanical grasping device is 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 to be welded of the folded weldment 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 it is ensured that the folding weldment and the special-shaped steel wire are perpendicular to each other, laying the foundation for subsequent pressing and welding operations.

[0121] S4, opening 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; S401, when 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 started to press the other end of the folding weldment to the folding weldment pressing top plate 403, and the third pressure sensor installed on the folding weldment pressing top plate 403 senses and feedbacks 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 away the first folding weldment pressing block 406, and the pressing process is restarted.

[0122] 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 to feedback 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.

[0123] The multi-position coordinated clamping of the folding weldment is realized. During the clamping process, the clamping force is monitored in real time through the pressure sensor to ensure that the folding weldment remains stable during the entire welding process.

[0124] S5. Turn on the spot welding clamping telescopic cylinder 503 to clamp the end of the folding weldment to be welded with the end of the special-shaped steel wire to be welded; wherein, the upper spot welding piece 5079 fits with the end of the folding weldment to be welded, and the lower spot welding piece 5089 fits with the end of the special-shaped steel wire to be welded. Specifically, the control system sends a command to the spot welding clamping telescopic cylinder 503, and the spot welding clamping telescopic cylinder 503 starts, pushing the spot welding clamping hinge block 504 and the spot welding clamping rotating plate 505 to rotate. The adjustable spot welding upper pressing block mechanism 507 installed at the other end of the spot welding clamping rotating plate 505 moves downward accordingly, so that the upper spot welding piece 5079 gradually approaches the end of the folding weldment to be welded. At the same time, the adjustable spot welding lower pressing block mechanism 508 serves as a support to ensure that the position of the end of the special-shaped steel wire to be welded is stable. When the upper and lower spot welding sheets are in contact with the folded weldment and the end to be welded of the special-shaped steel wire respectively, the spot welding clamping telescopic cylinder 503 continues to apply a certain pressure to achieve preliminary clamping of the welding part, creating good conditions for subsequent spot welding operations.

[0125] S6, the mechanical arm type spot welding mechanism 7 reaches the welding position by rotating the mechanical arm, and the upper spot welding pole of the mechanical arm type spot welding mechanism 7 is fitted with the upper spot welding sheet 5079; the lower spot welding pole of the mechanical arm type spot welding mechanism 7 is fitted with the lower spot welding sheet 5089. Specifically, after the mechanical arm type spot welding mechanism 7 receives the command issued by the control system, it starts to move by rotating the mechanical arm. Each joint of the rotating mechanical arm is driven by a high-precision servo motor, which can achieve fast and accurate positioning. The mechanical arm type spot welding mechanism 7 moves along the preset path, so that the upper spot welding pole and the lower spot welding pole of the mechanical arm type spot welding mechanism 7 are respectively close to the adjustable spot welding upper pressing block mechanism 507 and the adjustable spot welding lower pressing block mechanism 508. When the welding position is reached, the upper spot welding pole is precisely fitted with the upper spot welding sheet 5079, and the lower spot welding pole is precisely fitted with the lower spot welding sheet 5089, so as to prepare for the subsequent spot welding operation.

[0126] S7, open the upper spot welding pole and the lower spot welding pole of the mechanical arm spot welding mechanism 7, press the upper spot welding pole downward, and then make the upper spot welding piece 5079 fit closely with the end to be welded of the folded weldment, and the lower spot welding piece 5089 fit closely with the end to be welded of the special-shaped steel wire through the adjustable spot welding upper pressing block mechanism 507 and the adjustable spot welding lower pressing block mechanism 508, and complete the spot welding. Specifically, after the upper and lower spot welding poles of the mechanical arm spot welding mechanism 7 fit with the corresponding spot welding pieces, the control system sends a spot welding instruction to the mechanical arm spot welding mechanism 7. The upper spot welding pole applies a certain pressure downwards under the control of the control system. Meanwhile, the upper adjustment spring 5076 and the lower adjustment spring 5086 in the adjustable spot welding upper pressing block mechanism 507 and the adjustable spot welding lower pressing block mechanism 508 are elastically adjusted according to the preset pressure to ensure that the upper spot welding sheet 5079 and the end to be welded of the folding weldment and the lower spot welding sheet 5089 and the end to be welded of the special-shaped steel wire are closely fitted. At this time, the spot welding current forms a loop through the upper spot welding pole, the upper spot welding sheet 5079, the folding weldment, the special-shaped steel wire, the lower spot welding sheet 5089 and the lower spot welding pole, and generates resistance heat at the welding part, so that the metal at the welding part is rapidly melted and fused 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 by the current sensor and the temperature sensor to ensure the stability and reliability of the spot welding process.

[0127] S8. After spot welding is completed, the robot-type spot welding mechanism 7 releases the upper spot welding pole and the lower spot welding pole, moves to the next welding station, and repeats S1-S7. Specifically, after spot welding is completed, the robot-type spot welding mechanism 7 receives the command issued by the control system, releases the upper spot welding pole and the lower spot welding pole, and moves to the next welding station according to the preset path. At the same time, each clamping cylinder is released in sequence, the mechanical grasping device takes out the welded workpiece, and places the new special-shaped steel wire and folded weldment to the corresponding position, repeats the operation of S1-S7, realizes the automatic cycle of spot welding operation, and improves production efficiency.

[0128] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection 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 wire and folded weldment, and is characterized by: The structure includes: At least one first end clamping mechanism (1) used for clamping the first end of the special-shaped steel wire; At least one intermediate end clamping mechanism (2) used to clamp two locations of the transverse rod of the shaped steel wire, one location of the folding rod of the shaped steel wire, and one location of the vertical rod of the shaped steel wire; At least one second end clamping mechanism (3) used for clamping the second end of the special-shaped steel wire; At least one folded weldment pressing mechanism (4) for pressing the folded weldment so that it can be stacked with the spot welding portion of the special-shaped steel wire, thereby facilitating subsequent spot welding work; At least one spot welding clamping mechanism (5) is used to clamp the spot welding portion of the special-shaped steel wire; the spot welding clamping mechanism (5) comprises an adjustable spot welding upper clamping block mechanism (507) and an adjustable spot welding lower clamping block mechanism (508); the special-shaped steel wire and the folded weldment are stacked between the adjustable spot welding upper clamping block mechanism (507) and the adjustable spot welding lower clamping block mechanism (508); The spot welding end of the adjustable spot welding upper pressing block mechanism (507) is tightly fitted with the end of the folded weldment to be welded, and the spot welding end of the adjustable spot welding lower pressing block mechanism (508) is tightly fitted with the end of the special-shaped steel wire to be welded, so as to improve the current conduction efficiency, enable the part to be welded to heat up quickly and reach a preset welding state, and improve the welding quality; Wherein, the first end clamping mechanism (1), the middle end clamping mechanism (2) and the folding weldment clamping mechanism (4) are located on the same side, and the folding weldment clamping mechanism (4) is located between the first end clamping mechanism (1) and the middle end clamping mechanism (2); The second end clamping mechanism (3) and the spot welding clamping mechanism (5) are located on the same side and are arranged opposite to the first end clamping mechanism (1), the middle end clamping mechanism (2) and the folded weldment clamping mechanism (4).

2. The spot welding positioning and clamping structure according to claim 1, characterized in that: The first end clamping mechanism (1) comprises: A first end portion mounting rib plate (101); A first end mounting plate (102) which is mounted on the first end mounting rib plate (101) in a height-adjustable manner; A positioning top block (103) mounted on the first end mounting plate (102); A first end cushion block (104) mounted on the first end mounting plate (102); the first end cushion block (104) is provided with a first end clamping groove (105); A first end telescopic cylinder (106) mounted on a first end mounting plate (102); A first end hinge block (107) mounted on the telescopic end of the first end telescopic cylinder (106); A first end rotating plate (108), one end of which is hinged on the first end hinge block (107); A first end pressing block (109) mounted on the other end of the first end rotating plate (108); At least two first end locking blocks (110) which lock the first end rotating plate (108) and the first end mounting plate (102) via locking bolts; 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) presses the edge of the first end of the special-shaped steel wire.

3. The spot welding positioning and clamping structure according to claim 1, characterized in that: The intermediate end clamping mechanism (2) comprises: The middle end is provided with a rib plate (201); An intermediate end mounting plate (202) which is mounted on the intermediate end mounting rib plate (201) in an adjustable height; At least four middle end cushion blocks (203), which are respectively mounted on the middle end mounting plates (202); each of the middle end cushion blocks (203) is provided with a middle end pressing groove (204); An intermediate end telescopic cylinder (205) mounted on the intermediate end mounting plate (202); An intermediate end hinge block (206) mounted on the telescopic end of the intermediate end telescopic cylinder (205); An intermediate end rotating plate (207), one end of which is hinged to the intermediate end hinge block (206); At least four middle end pressing blocks (208), which are respectively mounted on the other end of the middle end rotating plate (207); At least two middle end locking blocks (209) which lock the middle end rotating plate (207) and the middle end mounting plate (202) via locking bolts; 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 are respectively located in corresponding middle end pressing grooves (204), and four middle end pressing blocks (208) respectively press the upper surface of the middle end of the special-shaped steel wire.

4. The spot welding positioning and clamping structure according to claim 1, characterized in that: The second end clamping mechanism (3) comprises: The second end portion is provided with a rib plate (301); A second end mounting plate (302) which is mounted on the second end mounting rib plate (301) in a height-adjustable manner; At least two second end pads (303), which are respectively mounted on the second end mounting plates (302); each of the second end pads (303) is provided with a second end clamping groove (304); A second end telescopic cylinder (305) mounted on the second end mounting plate (302); A second end hinge block (306) mounted on the telescopic end of the second end telescopic cylinder (305); A second end rotating plate (307), one end of which is hinged to the second end hinge block (306); At least two second end pressing blocks (308), which are respectively mounted on the other end of the second end rotating plate (307); At least two second end locking blocks (309) which lock the second end rotating plate (307) and the second end mounting plate (302) via locking bolts; The second ends of the special-shaped steel wires are respectively located in 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 wires.

5. The spot welding positioning and clamping structure according to claim 1, characterized in that: The folding weldment pressing mechanism (4) comprises: The folded weldment is pressed against the mounting rib plate (401); A folding weldment pressing and mounting plate (402) which is mounted on the folding weldment pressing and mounting rib plate (401) in a height-adjustable manner; A folding weldment pressing top plate (403) is mounted on the folding weldment pressing mounting plate (402) and forms a gap between the folding weldment pressing mounting plate (402); the folding weldment pressing top plate (403) is provided with a stop block (404) having an arc-shaped groove; A first folding weldment pressing telescopic cylinder (405) mounted on the folding weldment pressing mounting plate (402); A first folding weldment pressing block (406), which is connected to the telescopic end of the first folding weldment pressing telescopic cylinder (405) and is used to press the lower end of the folding weldment; The second folding weldment pressing telescopic cylinder (407) is mounted on the folding weldment pressing mounting plate (402); and is located above the first folding weldment pressing telescopic cylinder (405), and its telescopic direction is the same as that of the first folding weldment pressing telescopic cylinder (405); A second folding weldment pressing block (408), which is connected to the telescopic end of the second folding weldment pressing telescopic cylinder (407) and is used to press the middle end of the folding 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 a stop block (404) having an arc-shaped groove.

6. The spot welding positioning and clamping structure according to claim 1, characterized in that: The spot welding clamping mechanism (5) comprises: Spot weld and press the mounting rib plate (501); A spot welding clamping mounting plate (502) which is mounted on the spot welding clamping mounting rib plate (501) in a height-adjustable manner; A spot welding and clamping telescopic cylinder (503) mounted on a spot welding and clamping mounting plate (502); A spot welding and clamping hinge block (504) is mounted on the telescopic end of the spot welding and clamping telescopic cylinder (503); A spot welding pressing rotating plate (505), one end of which is hinged on the spot welding pressing hinge block (504); At least two spot welding locking blocks (506) are used to lock the spot welding pressing rotating plate (505) and the spot welding pressing mounting plate (502) via locking bolts; Wherein, 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 special-shaped steel wire and the folded weldment are stacked between an adjustable spot welding upper pressing block mechanism (507) and an adjustable spot welding lower pressing block mechanism (508).

7. The spot welding positioning and clamping structure according to claim 6, characterized in that: The adjustable spot welding upper pressing block mechanism (507) comprises: An upper adjustment box (5071) is mounted on the other end of the spot welding pressing rotating plate (505); At least one upper telescopic adjustment column (5072) inserted into the upper adjustment box (5071); An upper fixing plate (5073) is mounted on one end of the upper telescopic adjustment column (5072); and the upper fixing plate (5073) is press-fitted onto the upper adjustment box (5071) via an upper pressing folding plate (5074); An upper adjustment plate (5075) mounted on the other end of the upper telescopic adjustment column (5072); An upper adjustment spring (5076) is sleeved on the upper telescopic adjustment column (5072) via a snap ring; An upper spot welding connection block (5077), one end of which is mounted on the upper adjustment plate (5075); An upper spot welding connection column (5078), which is located on the other end of the upper spot welding connection block (5077); An upper spot welding sheet (5079), which 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); Upper circulation cooling pipe inlet (50710); Upper circulation cooling pipe outlet (50711); The upper circulation cooling pipe inlet (50710) and the upper circulation cooling pipe outlet (50711) are connected via a U-shaped circulation pipe provided in the upper spot welding connection block (5077).

8. The spot welding positioning and clamping structure according to claim 6, characterized in that: The adjustable spot welding lower pressing block mechanism (508) comprises: A lower adjustment box (5081) fixedly mounted on a side surface of the first end clamping mechanism (1); At least one lower telescopic adjustment column (5082) inserted into the lower adjustment box (5081); A lower fixing plate (5083) is mounted on one end of the lower telescopic adjustment column (5082); and the lower fixing plate (5083) is pressed onto the lower adjustment box (5081) via a lower pressing folding plate (5084); A lower adjustment plate (5085) mounted on the other end of the lower telescopic adjustment column (5082); A lower adjustment spring (5086) is sleeved on the lower telescopic adjustment column (5082) via a snap ring; A lower spot welding connection block (5087), one end of which is mounted on the lower adjustment plate (5085); A lower spot welding connection column (5088), which is located on the other end of the lower spot welding connection block (5087); A lower spot welding sheet (5089), which 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); Lower circulation cooling pipe inlet (50810); Lower circulation cooling pipe outlet (50811); The lower circulation cooling pipe inlet (50810) and the lower circulation cooling pipe outlet (50811) are connected via a U-shaped circulation pipe provided in the lower spot welding connection block (5087).

9. Spot welding equipment, characterized in that, The device comprises the spot welding positioning and clamping structure according to any one of claims 1 to 8, and further comprises: Base (6); Robotic arm spot welding mechanism (7); Electrical box (8); When the number of the spot welding positioning and clamping structures is two, the spot welding positioning and clamping structures are symmetrically arranged and fixedly mounted on the base (6); The mechanical arm type spot welding mechanism (7) is installed on the top of the equipment by rotating the mechanical arm; When welding of special-shaped steel wires and folded weldments is required, the upper spot welding pole of the mechanical arm type spot welding mechanism (7) fits with the upper spot welding sheet (5079); and the lower spot welding pole of the mechanical arm type spot welding mechanism (7) fits with the lower spot welding sheet (5089).

10. A spot welding method, characterized in that: The method is applicable to the spot welding device according to claim 9, and the method comprises: S1. Placing 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) by means of a mechanical grabbing device; S2, opening the first end telescopic cylinder (106), the middle end telescopic cylinder (205) and the second end telescopic cylinder (305), and pressing 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, placing the end of the folded weldment to be welded on the special-shaped steel wire by a mechanical grabbing device, inserting the other end of the folded weldment into a stop block with an arc-shaped groove, and the folded weldment and the special-shaped steel wire are perpendicular to each other; S4, opening 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; S5, turning on the spot welding pressing telescopic cylinder (503) to press the end of the folded weldment to be welded and the end of the special-shaped steel wire to be welded; wherein the upper spot welding piece (5079) is fitted with the end of the folded weldment to be welded, and the lower spot welding piece (5089) is fitted with the end of the special-shaped steel wire to be welded; S6, the mechanical arm type spot welding mechanism (7) reaches the welding position by rotating the mechanical arm, and the upper spot welding electrode of the mechanical arm type spot welding mechanism (7) is fitted with the upper spot welding sheet (5079); the lower spot welding electrode of the mechanical arm type spot welding mechanism (7) is fitted with the lower spot welding sheet (5089); S7, opening the upper spot welding electrode and the lower spot welding electrode of the mechanical arm type spot welding mechanism (7), pressing the upper spot welding electrode downward, and then using the adjustable spot welding upper pressing block mechanism (507) and the adjustable spot welding lower pressing block mechanism (508) to make the upper spot welding piece (5079) fit tightly with the end to be welded of the folded weldment, and the lower spot welding piece (5089) fit tightly with the end to be welded of the special-shaped steel wire, and complete the spot welding; S8. After the spot welding is completed, the robot-type spot welding mechanism (7) releases the upper spot welding electrode and the lower spot welding electrode, moves to the next welding station, and repeats S1-S7.

Images