A robotic double-sided spot welding device and method for nail implantation

Abstract

This invention relates to the field of resistance welding technology, specifically to a robotic double-sided spot welding device and method for stapling. The invention provides a robotic double-sided spot welding device for stapling, comprising: a main support frame fixed to the movable end of a welding robot and a stapling welding assembly disposed on the main support frame. The stapling welding assembly includes: an upper electrode post disposed on the workpiece and rotatable relative to the main support frame; an upper electrode cylinder disposed below the workpiece and carrying the stapling; and a lower electrode post rotatably disposed at the lower end of the upper electrode cylinder. Based on the principle of resistance welding, this invention achieves adaptive parameter matching through a welding current adjustment component and a welding pressure adjustment component. The current adjustment component converts the stapling diameter signal into air pressure drive, adjusting the electrode contact area to ensure resistance-thermal adaptation; the pressure adjustment component changes the lever fulcrum to dynamically adjust the pressure. This solves the problems of incomplete welding and burn-off caused by uniform parameters in traditional equipment, improving the strength and stability of the weld.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of resistance welding, in particular to a robot pin planting double-sided spot welding device and method. BACKGROUND

[0002] In modern industrial production, pin planting welding as an important connection process is widely used in many fields such as automobile manufacturing, electronic equipment production, aerospace, etc. Among them, the pin planting welding technology based on the principle of resistance welding has become the mainstream choice in the industry due to its advantages of high efficiency and reliability. Resistance welding generates resistance heat through the current flowing through the contact interface between the pin and the workpiece, heats the metal at the contact part to a plastic or molten state, and forms a firm welding spot under the action of pressure. The welding quality and efficiency directly affect the performance and production efficiency of the product.

[0003] Traditional resistance welding pin planting technology, such as ordinary electric arc stud welding and capacitor energy storage stud welding, has many drawbacks. On the one hand, these conventional welding methods often require the purchase of welding machines and matching special welding guns, and for different diameters of pins, multiple matching pin welding guns need to be equipped. When there are many types of pins, the operator has to frequently switch welding guns during the welding process, which not only greatly reduces the production efficiency, but also significantly increases the labor intensity, and also increases the equipment investment cost. For example, in the field of automobile manufacturing welding technology, due to the variety of pin diameters, the traditional welding method leads to low production efficiency, which cannot meet the needs of large-scale production.

[0004] On the other hand, according to the principle of resistance welding (Q = I 2 Rt, where Q is heat, I is current, R is resistance, and t is time), the contact area and resistance of pins of different diameters with the workpiece are significantly different, and different current sizes and welding forces need to be matched during welding to ensure welding quality. However, most existing welding equipment cannot adaptively adjust according to the diameter of the pin. For large-diameter pins, the contact area with the workpiece is large and the resistance value is relatively small. If uniform current and welding force parameters are used, the current may be too small to produce enough heat and pressure, making the welding interface unable to fully fuse, resulting in problems such as virtual welding, welding, and serious impact on product structural strength. For small-diameter pins, the contact area is small and the resistance value is large. Under uniform parameters, the large current and pressure will cause instantaneous overheating, causing pin burning and workpiece deformation, also reducing product quality. SUMMARY

[0005] The present application provides a robot pin planting double-sided spot welding device and method, which can adaptively adjust the current size and welding force according to the diameter of the pin to improve the welding quality.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme:

[0007] A robotic double-sided spot welding device for nail implantation includes:

[0008] The welding robot, the main support frame fixed to the movable end of the welding robot, and the stud welding assembly set on the main support frame, the stud welding assembly including: an upper electrode post set on the workpiece and rotatable relative to the main support frame; an upper electrode cylinder set below the workpiece and carrying the studs; a lower electrode post rotatably set at the lower end of the upper electrode cylinder, the lower electrode post being externally threaded to the lower electrode cylinder, and the lower end of the lower electrode cylinder being sequentially fixedly connected to a sliding frame and a welding energy storage body, and the sliding frame being fixedly connected to the main support frame;

[0009] A pin fixing and diameter measuring assembly is arranged in a ring array inside the upper electrode cylinder. The pin fixing and diameter measuring assembly includes an insulating clamping rod that makes linear rolling contact with the outer peripheral surface of the pin.

[0010] The welding current adjustment component is installed on the sliding frame. After multiple insulating clamping rods synchronously and adaptively clamp the anchor, the welding current adjustment component adaptively adjusts the contact area between the lower electrode post and the lower electrode cylinder.

[0011] A welding pressure regulating assembly is installed on the main support frame. The welding pressure regulating assembly includes a lever and a fulcrum sliding seat that can change position relative to the lever. A distance sensor is embedded on one side of the fulcrum sliding seat. After multiple insulating clamping rods synchronously and adaptively clamp the nail, the welding pressure regulating assembly adaptively adjusts the position of the fulcrum sliding seat relative to the lever. One end of the lever is hinged to a welding energy storage body through a hinge seat, and the other end is hinged to a vertical telescopic drive component.

[0012] The stud welding assembly, stud fixing and diameter measuring assembly, welding current regulating assembly, and welding pressure regulating assembly are electrically connected to a control assembly.

[0013] Furthermore, the implant has a rod and a head that are connected to each other. When the implant is in a welded state, the rod contacts the inner bottom surface of the upper electrode cylinder and the head contacts the upper end surface of the upper electrode cylinder.

[0014] Furthermore, the pin fixing and diameter measuring assembly includes an insulating horizontal cylinder fixed to the inner side of the upper electrode cylinder. A piston block is airtightly slidably connected inside the insulating horizontal cylinder. A rod is fixed to one end of the piston block. One end of the rod passes through the insulating horizontal cylinder and is fixedly connected to a support column. An insulating clamping rod is rotatably mounted on the support column. An elastic element is fixed between the piston block and the inner wall of the insulating horizontal cylinder. An electromagnet is fixed to the inner wall of the insulating horizontal cylinder. The piston block is made of ferromagnetic material.

[0015] One of the piston blocks has a conductive block embedded on its outer surface, the conductive block being electrically in contact with a conductive strip, and the conductive strip being embedded in the inner wall of the insulating horizontal cylinder;

[0016] The conductive block and conductive strip are electrically connected to the control component, and the control component is electrically connected to an electromagnet.

[0017] Furthermore, the welding current regulating assembly includes a fixed frame fixed to the sliding frame, a cylinder fixed to the inner top of the fixed frame, the cylinder being in gaseous communication with multiple insulating horizontal cylinders, a mounting plate fixed to the lower end of the cylinder, a contact switch fixed to the mounting plate, and the contact switch being electrically connected to the control assembly. The welding current regulating assembly also includes a driving structure for driving the lower electrode post.

[0018] Furthermore, the driving structure includes a screw rotatably connected to the top of the fixed frame, a rotary drive component for driving the screw is fixed at the lower end of the sliding frame, a thick gear and a lifting plate are provided on the upper and lower ends of the screw, the thick gear is fixed to the screw and the lifting plate is threadedly connected to the screw, a limit rod is fixed at the lower end of the lifting plate and the limit rod is set to limit the installation plate, and a thin gear that meshes with the thick gear is fixed on the lower electrode post.

[0019] Furthermore, the welding pressure regulating assembly also includes a horizontal telescopic drive component fixed to the main support frame. The telescopic end of the horizontal telescopic drive component is fixed with a push block. The push block is fixedly connected to the fulcrum sliding seat. The horizontal telescopic drive component is electrically connected to the control component. A guide rail is fixed to one side of the main support frame, and the guide rail is slidably connected to the sliding frame.

[0020] Furthermore, the horizontal telescopic drive component is misaligned with the lever.

[0021] A spot welding method for a root robot pin-planting double-sided spot welding device includes the following steps:

[0022] S1. When multiple insulating clamping rods are in a dispersed state, insert the pin into the upper electrode cylinder, and then make the multiple insulating clamping rods adaptively and elastically fix the pin.

[0023] S2. Place the workpiece on the pin and position it at the pin location. Rotate the upper electrode post to align it with the pin position.

[0024] S3. The control component adjusts the contact area between the lower electrode post and the lower electrode cylinder and adjusts the position of the fulcrum sliding seat relative to the lever based on the radial displacement of the insulating clamping rod.

[0025] The technical solution provided by this invention has the following advantages compared with the known prior art:

[0026] 1. Based on the principle of resistance welding, this invention achieves adaptive matching of parameters through a welding current adjustment component and a welding pressure adjustment component. The welding current adjustment component, through the gaseous connection between the cylinder and the insulating horizontal cylinder, converts the stud diameter signal into a pneumatic drive. This pneumatic drive, via gear transmission, adjusts the contact area between the lower electrode post and the lower electrode cylinder. This allows large-diameter studs to obtain a larger contact area to avoid insufficient heat generation, while reducing the contact area for small-diameter studs to prevent excessive current, ensuring that the resistance heat Q = I for studs of different diameters is achieved. 2 Rt always adapts to welding requirements; the welding pressure adjustment component changes the lever fulcrum position through the horizontal telescopic drive component, and dynamically adjusts the welding pressure using the lever arm ratio. Large-diameter studs are in the force-saving mode to provide sufficient pressure, while small-diameter studs are switched to the distance-saving mode to avoid workpiece deformation. This fundamentally solves the quality problems such as false welding, detachment, and stud burn-out caused by the uniform parameters of traditional equipment, and significantly improves the weld strength and product structure stability.

[0027] 2. This invention integrates pin fixing and diameter measurement components. It utilizes a ring-shaped array of insulating clamping rods that adaptively converge and clamp pins of different diameters under the action of elastic elements. Combined with the real-time detection of pin diameter by the resistance changes of conductive blocks and conductive strips, the pin positioning, fixing, and size identification can be completed without manual intervention. This effectively avoids the problem of frequent switching of welding guns due to the large number of pin types in traditional technologies, significantly reduces the labor intensity of operators, reduces the equipment investment cost of multiple welding guns, and greatly improves production efficiency. It is especially suitable for large-scale production scenarios with diverse pin diameter specifications, such as automobile manufacturing. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the present invention after the welding robot has been removed;

[0031] Figure 3 This is a cross-sectional view of the present invention;

[0032] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 for Figure 3Enlarged view of point B in the middle;

[0034] Figure 6 for Figure 3 A magnified view of a portion of the image.

[0035] Reference numerals: 1. Welding robot; 2. Main support frame; 3. Pin-mounted welding assembly; 31. Upper electrode column; 32. Upper electrode cylinder; 33. Lower electrode column; 34. Lower electrode cylinder; 35. Sliding frame; 36. Welding energy storage body; 4. Pin-mounted fixing and diameter measuring assembly; 41. Insulating clamping rod; 42. Support column; 43. Insulating horizontal cylinder; 44. Rod body; 45. Piston block; 46. Electromagnet; 47. Elastic element; 48. Conductive block; 49. Conductive element 5. Welding current adjustment assembly; 51. Fixing frame; 52. Cylinder; 53. Mounting plate; 54. Contact switch; 55. Screw; 56. Thin gear; 57. Thick gear; 58. Lifting plate; 59. Limiting rod; 6. Welding pressure adjustment assembly; 61. Guide rail; 62. Lever; 63. Vertical telescopic drive component; 64. Sliding groove; 65. Pivot sliding seat; 66. Push block; 67. Horizontal telescopic drive component; 100. Stud; 200. Workpiece. Detailed Implementation

[0036] To better understand this technical solution, the following will provide a detailed description of the technical solution in conjunction with the accompanying drawings and specific implementation methods.

[0037] Example:

[0038] Reference Figures 1 to 6 A robotic pin-planting double-sided spot welding device includes a welding robot 1. The movable end of the welding robot 1 is fixedly connected to a main support frame 2. The main support frame 2 integrates a pin-planting welding component 3, a pin-planting fixing and diameter measuring component 4, a welding current adjusting component 5, and a welding pressure adjusting component 6. Each component is electrically connected to a control component. Through coordinated action, automated welding of pins 100 of different diameters can be achieved without frequent switching of welding guns.

[0039] Reference Figure 3The stud welding assembly 3, serving as the core of the welding process, includes an upper electrode post 31 and an upper electrode cylinder 32. The upper electrode post 31 is located above the workpiece 200 and can be rotated by the drive mechanism of the main support frame 2, allowing for precise alignment of the heads of studs 100 of different diameters without replacement. The upper electrode cylinder 32 is placed below the workpiece 200 to support the studs 100, and its lower end is rotatably connected to the lower electrode post 33. The outer surface of the lower electrode post 33 is provided with external threads, which are connected to the lower electrode cylinder 34 through threaded engagement. The lower end of the lower electrode cylinder 34 is sequentially fixed with a sliding frame 35 and a welding energy storage body 36. The sliding frame 35 is fixed to the main support frame 2 to form a stable support, and the welding energy storage body 36 provides electrical energy for welding. The overall structure avoids the positioning errors and efficiency losses caused by switching multiple welding guns in traditional equipment.

[0040] Reference Figure 4 The pin fixing and diameter measurement component 4 is arranged in a ring array inside the upper electrode cylinder 32 to realize the automatic positioning, fixing and diameter detection of the pin 100. The component includes an insulating horizontal cylinder 43 fixed to the inside of the upper electrode cylinder 32. A piston block 45 made of ferromagnetic material is airtightly slidably connected inside the insulating horizontal cylinder 43. A rod 44 is fixed to one end of the piston block 45. The rod 44 passes through the insulating horizontal cylinder 43 and is connected to a support column 42. An insulating clamping rod 41 is rotatably mounted on the support column 42. The insulating clamping rod 41 makes linear rolling contact with the outer circumferential surface of the pin 100 rod, which ensures clamping stability and avoids conductive interference. An electromagnet 46 is fixed to the inner wall of an insulating horizontal cylinder 43, and an elastic element 47 (such as a compression spring) is fixed between a piston block 45 and the inner wall of the insulating horizontal cylinder 43. Initially, the control component energizes the electromagnet 46, attracting the piston block 45 and dispersing the insulating clamping rod 41, facilitating the insertion of the nail 100. After insertion, the electromagnet 46 is de-energized, and the piston block 45, under the action of the elastic element 47, pulls the insulating clamping rod 41 towards the center, automatically adapting to nails 100 of different diameters and completing fixation without manual adjustment. A conductive block 48 is embedded on the outer surface of one of the piston blocks 45, making electrical contact with the conductive strip 49 on the inner wall of the insulating horizontal cylinder 43. The effective resistance of the circuit changes with the displacement of the piston block 45, transmitting the nail 100 diameter signal to the control component in real time, replacing traditional manual identification and parameter setting.

[0041] Reference Figure 5The welding current adjustment component 5 is mounted on the sliding frame 35 to achieve adaptive current adjustment for the resistance differences of the studs 100 with different diameters. The component includes a fixed frame 51 fixed to the sliding frame 35. A cylinder 52 (elastic telescopic rod structure with telescopic and self-resetting functions) is fixed at the top of the fixed frame 51. The cylinder 52 is in gaseous communication with multiple insulated horizontal cylinders 43 through an air pipe and can receive the air pressure signal generated by the piston block 45 when the stud 100 is clamped. A mounting plate 53 is fixed at the lower end of the cylinder 52. A contact switch 54 is fixed on the mounting plate 53 and is electrically connected to the control component. The welding current regulating assembly 5 also includes a drive structure: a screw 55 is rotatably connected to the top of the fixed frame 51, and a rotary drive component (such as a servo motor) is fixed to the lower end of the sliding frame 35 to drive the screw 55 to rotate; a thick gear 57 and a lifting plate 58 are provided on the screw 55 from top to bottom, the thick gear 57 is fixed to the screw 55, the lifting plate 58 is threaded to the screw 55, and a limiting rod 59 is fixed to the lower end of the lifting plate 58, which limits the penetration of the mounting plate 53; a thin gear 56 that meshes with the thick gear 57 is fixed on the lower electrode post 33, the thickness of the thick gear 57 is greater than that of the thin gear 56, to ensure stable meshing when the lower electrode post 33 moves axially. When the diameter of the implant 100 is large, the displacement of the piston block 45 is large, and the air pressure inside the insulating horizontal cylinder 43 pushes the cylinder 52 to extend further, resulting in a larger distance between the mounting plate 53 and the lifting plate 58. The control component drives the screw 55 to rotate, which in turn drives the lower electrode post 33 to rotate through the meshing of the thick gear 57 and the thin gear 56. This causes the lower electrode post 33 to shorten its total length by threaded engagement with the lower electrode cylinder 34. At the same time, the lifting plate 58 moves down along the limit rod 59 until it contacts the contact switch 54, at which point the control component stops driving. At this point, the contact area between the lower electrode post 33 and the lower electrode cylinder 34 is larger (according to the resistance welding principle Q=I). 2 Rt, increasing the contact area can reduce the resistance, and in conjunction with the output current of the welding energy storage body 36, ensure that the large-diameter pin 100 receives sufficient heat and avoids poor soldering; conversely, the small-diameter pin 100 corresponds to a smaller contact area, which can prevent excessive current from causing burn-out.

[0042] Reference Figure 6The welding pressure regulating component 6 is installed on the main support frame 2 to achieve adaptive adjustment of the welding pressure. The component includes a lever 62, one end of which is hinged to a welding energy storage body 36 via a hinge seat, and the other end is hinged to a vertical telescopic drive component 63 (such as a hydraulic cylinder). A guide rail 61 is fixed on one side of the main support frame, and the guide rail 61 is slidably connected to a sliding frame 35. The sliding frame 35 and the welding energy storage body 36 can only move vertically under the limitation of the guide rail 61. The hinge seat provides a function to compensate for motion interference between one end of the lever 62 and the vertically movable welding energy storage body 36. A sliding groove 64 is provided in the middle of the lever 62, and the fulcrum sliding seat 65 can slide along the sliding groove 64. The fulcrum sliding seat 65 is equipped with a distance sensor on one side. The distance sensor is electrically connected to the control component and is used to send a signal to the control component so that it knows the direction and distance of movement of the fulcrum sliding seat 65, thereby controlling the hydraulic pressure after the extension distance of the vertical telescopic drive 63 is determined, thereby controlling the welding pressure. The horizontal telescopic drive 67 is fixed on the main support frame 2, and the extension end of the drive block 66 is fixed to the push block 66. The push block 66 is fixed to the fulcrum sliding seat 65. The horizontal telescopic drive 67 is electrically connected to the control component and is staggered with the lever 62 to avoid motion interference. When the diameter of the implant 100 changes, the control component adjusts the position of the fulcrum sliding seat 65 according to the resistance signals of the conductive block 48 and the conductive strip 49 using the preset formula "horizontal telescopic drive 67 telescopic amount L = L initial position + (R actual resistance - R initial resistance) × k" (k is a proportional coefficient): a large-diameter implant 100 requires greater pressure, so the fulcrum moves towards the power end, the power arm L1 decreases, and the resistance arm L2 increases. According to the lever principle S2 = S1 × (L2 / L1), when the vertical telescopic drive 63 telescopic distance S1 is fixed, the lifting distance S2 at the other end of the lever 62 is greater; a small-diameter implant 100 achieves a decrease in S2 by moving the fulcrum towards the resistance end.

[0043] According to the static equilibrium formula F1×L1=F2×L2, the output welding pressure F2 can be expressed as: F2=(F1×L1) / L2, where F1 is the driving force applied by the vertical telescopic drive 63, L1 is the distance from the fulcrum sliding seat 65 to the power end, and L2 is the distance from the fulcrum sliding seat 65 to the resistance end. When the diameter of the stud 100 increases: because the control component drives the fulcrum sliding seat 65 to move towards the power end, L1 decreases and L2 increases, and the L1 / L2 ratio decreases. At this time, the control component increases the hydraulic pressure after the vertical telescopic drive 63 has determined its telescopic distance, thereby increasing the welding pressure F2. Conversely, when the diameter of the stud 100 decreases: the fulcrum sliding seat 65 moves towards the resistance end, causing L1 to increase and L2 to decrease, and the L1 / L2 ratio to increase. At this time, the control component decreases the hydraulic pressure after the vertical telescopic drive 63 has determined its telescopic distance, thereby decreasing the welding pressure F2.

[0044] The spot welding method of this device is as follows: In the initial state, the electromagnet 46 is energized to disperse the insulating clamping rod 41, and the upper electrode post 31 rotates to a non-interference position; S1, the pin 100 is placed into the upper electrode cylinder 32, the control component de-energizes the electromagnet 46, and the insulating clamping rod 41 is brought together and clamped by the elastic element 47, while the diameter is detected by the resistance change of the conductive block 48 and the conductive strip 49; S2, the workpiece 200 is placed above the pin 100, and the upper electrode post 31 is driven to rotate to correspond with the head of the pin 100; S3, according to the diameter signal, the control component changes the contact area (adaptive current) between the lower electrode post 33 and the lower electrode cylinder 34 through the welding current adjustment component 5, and changes the fulcrum position (adaptive pressure) of the lever 62 through the welding pressure adjustment component 6; finally, the vertical telescopic drive component 63 pushes the lever 62, driving the welding component to apply an appropriate current and pressure to the pin 100 and the workpiece 200, completing the double-sided spot welding.

[0045] The entire device achieves automatic positioning and diameter detection through the pin fixing and diameter measurement component 4, and achieves adaptive parameter adjustment with the help of the welding current adjustment component 5 and the welding pressure adjustment component 6. It can adapt to pins of different diameters without switching welding torches, solving the problems of low efficiency and unstable quality of traditional technology, and significantly improving welding quality and production efficiency.

[0046] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0047] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A robot implant insertion double-sided spot welding device, characterized by, The application relates to a welding robot, a main body carrier fixed to the active end of the welding robot and a nail welding assembly arranged on the main body carrier, wherein the nail welding assembly comprises: an upper electrode column arranged above a workpiece and capable of being driven to rotate relative to the main body carrier; an upper electrode cylinder arranged below the workpiece and capable of bearing a nail; a lower electrode column rotatably arranged at the lower end of the upper electrode cylinder, wherein the lower electrode column is externally screwed with the lower electrode cylinder, the lower end of the lower electrode cylinder is fixedly connected with a sliding frame and a welding energy storage body in sequence, and the sliding frame is fixedly connected with the main body carrier; a nail fixing and diameter measuring assembly arranged in the upper electrode cylinder in a ring array, wherein the nail fixing and diameter measuring assembly comprises: an insulating clamping rod in linear rolling contact with the outer circumferential surface of the nail; a welding current adjusting assembly arranged on the sliding frame, wherein the welding current adjusting assembly is capable of adaptively adjusting the contact area between the lower electrode column and the lower electrode cylinder after the multiple insulating clamping rods synchronously adaptively clamp the nail; a welding pressure adjusting assembly arranged on the main body carrier, wherein the welding pressure adjusting assembly comprises a lever and a fulcrum sliding seat capable of changing position relative to the lever, one side of the fulcrum sliding seat is embedded with a distance sensor, the welding pressure adjusting assembly is capable of adaptively adjusting the position of the fulcrum sliding seat relative to the lever after the multiple insulating clamping rods synchronously adaptively clamp the nail, one end of the lever is hingedly connected with the welding energy storage body through a hinged seat, and the other end of the lever is hingedly connected with a vertical telescopic driving element; and the nail welding assembly, the nail fixing and diameter measuring assembly, the welding current adjusting assembly and the welding pressure adjusting assembly are electrically connected with a control assembly. The nail has a rod part and a head part connected with each other, the rod part of the nail in the welding state is in contact with the inner bottom surface of the upper electrode cylinder, and the head part is in contact with the upper end surface of the upper electrode cylinder. The nail fixing and diameter measuring assembly comprises an insulating horizontal cylinder fixed to the inner side of the upper electrode cylinder, the insulating horizontal cylinder is airtightly and slidably connected with a piston block, one end of the piston block is fixed with a rod body, one end of the rod body penetrates through the insulating horizontal cylinder and is fixedly connected with a supporting column, the insulating clamping rod is rotatably arranged on the supporting column, an elastic element is fixed between the piston block and the inner wall of the insulating horizontal cylinder, the inner wall of the insulating horizontal cylinder is fixed with an electromagnet, and the piston block is made of ferromagnetic material; The outer surface of one of the piston blocks is embedded with a conductive block, the conductive block is electrically connected with a conductive strip, and the conductive strip is embedded in the inner wall of the insulating horizontal cylinder; The conductive block, the conductive strip and the control assembly are electrically connected, and the control assembly is electrically connected with the electromagnet. The welding current adjusting assembly comprises a fixed frame fixed to the sliding frame, the inner top end of the fixed frame is fixed with an air cylinder, the air cylinder is in gaseous communication with the multiple insulating horizontal cylinders, the lower end of the air cylinder is fixed with a mounting plate, the mounting plate is fixed with a contact switch, the contact switch is electrically connected with the control assembly, and the welding current adjusting assembly further comprises a driving structure for driving the lower electrode column.

2. The robot implantation double-sided spot welding device according to claim 1, characterized in that, ​ 3. The robot implant screwing and spot welding device according to claim 1, characterized in that, ​ ​ ​ 4. The robot implant screwing and spot welding apparatus according to claim 1, wherein ​ 5. The robotically implanted bi-facial spot welding device of claim 4, wherein, The driving structure comprises a screw rod rotatably connected to the top end of the fixed frame, and a rotating driving member for driving the screw rod is fixed to the lower end of the sliding frame, the screw rod is provided with a thick gear and a lifting plate from top to bottom, the thick gear is fixed to the screw rod, and the lifting plate is threadedly connected to the screw rod, the lower end of the lifting plate is fixed with a limiting rod, and the limiting rod is arranged through the mounting plate, and a thin gear engaged with the thick gear is fixed to the lower electrode column.

6. The robot implant screwing and spot welding apparatus according to claim 1, wherein The welding pressure adjusting assembly further comprises a horizontal telescopic driving member fixed to the main body carrier, a pushing block is fixed to the telescopic end of the horizontal telescopic driving member, the pushing block is fixedly connected to the fulcrum sliding seat, and the horizontal telescopic driving member is electrically connected to the control assembly; one side of the main body carrier is fixed with a guide rail, and the guide rail is slidably connected to the sliding frame.

7. The robotically implanted bi-facial spot welding device of claim 6, wherein, The horizontal telescopic driving member is distributed in dislocation with the lever.

8. A spot welding method of the robot implantation double-sided spot welding apparatus according to any one of claims 1 to 7, characterized by, The method comprises the following steps: S1, when the plurality of insulation holding rods are in a dispersed state, the implant is placed in the upper electrode cylinder, and then the plurality of insulation holding rods are self-adapted to elastically fix the implant; S2, the workpiece is placed on the implant and is located at the implant of the workpiece, and the upper electrode column is rotated to correspond to the position of the implant; S3, the control assembly adjusts the contact area of the lower electrode column and the lower electrode cylinder according to the radial displacement of the insulation holding rod, and the implant welding assembly adjusts the position of the fulcrum sliding seat relative to the lever.

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