Stud welding gun assembly capable of adjusting arc striking distance and stud welding gun

Abstract

The utility model relates to the technical field of stud welding, in particular to a stud welding gun assembly capable of adjusting the arc strike spacing and a stud weld.The welding gun assembly comprises a lifting unit, a sliding block, a main shaft, a stud clamping unit and a positioning part, the lifting unit drives the sliding block to move up and down, the main shaft is hung on the sliding block, and the stud clamping unit is arranged on the main shaft; the upper end of the stud clamping unit is fixedly connected with the lower end of the main shaft, the horizontal height of the lowest face of the positioning piece is smaller than that of the lowest face of the stud clamping unit, the sliding block and the main shaft can slide relatively, when the main shaft is jacked up by a stud, the sliding block keeps still, and when the sliding block ascends, the sliding block firstly ascends to make contact with the main shaft connecting plate; and the main shaft and the studs are driven to ascend, so that the arc striking distances of the studs with arc striking points and without arc striking points are the same, the combustion space is consistent, and the uniformity of welding quality is improved.

Description

Technical Field

[0001] This invention relates to the field of stud welding technology, specifically to a stud welding torch assembly and a stud welding torch with adjustable arc striking distance. Background Technology

[0002] In stud welding, each stud has an arc-starting point at its base. Its main functions are to initiate the electric arc, stabilize the welding process, control weld quality, and adapt to different welding conditions. The arc-starting point is a small aluminum dot that ignites the stud from the center before disappearing. It was primarily used for older, less advanced welding equipment. Modern welding equipment can generate high currents, so even without an arc-starting point, ensuring proper arc initiation is sufficient to guarantee weld quality. During stud production and use, collisions during transportation and handling, as well as other factors, can cause some studs to lose their arc-starting points.

[0003] Existing automatic arc welding equipment lifts the stud from the welding surface by a fixed arc-starting distance before welding, so as to initiate the arc for welding. However, since some studs have arc-starting points and some do not, the arc-starting distance is inconsistent during the welding process. The arc-starting distance with arc-starting points is large, and the arc-starting distance without arc-starting points is small. The arc-starting distance set by the automatic welding gun is usually adapted to the arc-starting points, which leads to insufficient combustion of the arc-starting distance without arc-starting points and poor welding quality. Summary of the Invention

[0004] The present invention provides an adjustable stud welding torch assembly, a stud welding torch, and a stud welding torch to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An adjustable stud welding torch assembly includes a lifting unit, a lead screw slider, a main shaft, a stud clamping unit, and a positioning component. The lifting unit drives the lead screw slider to move up and down. The main shaft is mounted on the lead screw slider. The upper end of the stud clamping unit is fixedly connected to the lower end of the main shaft. The lowest surface of the positioning component is lower than the lowest surface of the stud clamping unit. By adopting the above technical solution, the lead screw slider and the main shaft are relatively slidable. When the main shaft is lifted by the stud, the lead screw slider remains stationary. When the lead screw slider rises, it first rises to contact the main shaft connecting plate, and then drives the main shaft and stud to rise. This ensures that the arc-starting distance is the same for studs with and without arc-starting points, resulting in consistent combustion space and improved welding quality uniformity.

[0007] A stud welding torch includes the aforementioned adjustable arc-starting pitch stud welding torch assembly and mounting assembly.

[0008] Furthermore, the mounting assembly includes a connecting plate, a welding torch, an upper connecting block, a lower connecting block, a sliding rod, and a lifting slider. The connecting plate is connected to a motor and a lead screw. The lifting slider is slidably connected to the sliding rod. The upper end of the sliding rod is fixedly connected to the upper connecting block, and the lower end of the sliding rod is fixedly connected to the lower connecting block. An upper spring is provided between the upper end of the lifting slider and the upper connecting block, and a lower spring is provided between the lower end of the lifting slider and the lower connecting block. Both the upper and lower connecting blocks are fixedly connected to the connecting plate. Both the upper and lower connecting blocks have circular holes for the welding torch to pass through. The welding torch passes through the circular holes and is fixedly connected to the upper and lower connecting blocks. A connecting block is provided at the lower end of the welding torch. The positioning element is a ceramic ring clamping unit, and the welding torch is fixedly connected to the ceramic ring clamping unit through this connecting block. By adopting the above technical solution, the lifting slider slides, driving the welding torch to move smoothly up and down.

[0009] Furthermore, the lifting unit includes a motor and a lead screw. The motor is mounted on a motor mounting plate, which is mounted on the upper end of a connecting plate. The motor is equipped with a protective housing. The motor shaft is fixedly connected to the lead screw via a coupling. The lead screw is connected to an upper connecting seat and a lower connecting seat. The upper connecting seat is mounted on the upper part of the connecting plate, and the lower connecting seat is mounted on the lower end of the connecting plate. By adopting the above technical solution, the lead screw, motor, and other components are compactly installed.

[0010] Furthermore, the lead screw slider includes a lead screw connecting part, a main shaft connecting part, a slide rail, and an insulating sheet. The insulating sheet is located between the lead screw connecting part and the main shaft connecting part, and the slide rail is located on the side of the lead screw connecting part away from the insulating sheet. The lead screw connecting part, the main shaft connecting part, the slide rail, and the insulating sheet are fixedly connected. The lead screw connecting part has a threaded hole for connecting the lead screw, and the main shaft connecting part has a connecting circular hole for the main shaft to pass through. The connecting plate has a first sliding groove on the side near the lead screw. The first sliding groove is located between the upper connecting seat and the lower connecting seat, and the slide rail of the lead screw slider can slide within the first sliding groove. By adopting the above technical solution, the lead screw connecting part and the main shaft connecting part are separated, avoiding mutual interference between the main shaft and the lead screw.

[0011] Furthermore, a first spring is provided at the upper end of the main shaft, and a stud connecting plate is provided at the lower end of the main shaft. The upper end of the first spring is fixedly connected to the motor mounting plate through a spring insulating seat, and the lower end of the first spring is fixedly connected to the main shaft through a spring base. A copper sleeve and a steel sleeve are fitted on the main shaft at the slider connection point. The copper sleeve is fitted on the main shaft, and the steel sleeve is fitted on the copper sleeve. The main shaft connection part is fitted on the steel sleeve. The copper sleeve, steel sleeve, and main shaft connection part are relatively fixed. A pin is provided on the main shaft, and the copper sleeve and steel sleeve have a second sliding groove for the pin to slide. By adopting the above technical solution, the first spring is provided to facilitate the downward pressure of the main shaft during welding, pressing the stud into the molten pool and ensuring full adhesion with the welded object.

[0012] Furthermore, the mounting assembly includes an upper connecting seat, a lower connecting seat, a gun rod, and a connecting block. Each of the connecting seat, lower connecting seat, and connecting block has a circular hole for the gun rod to pass through. The gun rod is fixedly connected to the connecting seat, lower connecting seat, and connecting block through the circular hole. The positioning element is a ceramic ring clamping unit, which is fixedly connected to the gun rod through the connecting block. By adopting the above technical solution, the motor welding can be started simply by the bottom end of the ceramic ring clamping unit touching the workpiece.

[0013] Furthermore, the lifting unit includes a motor and a lead screw. The motor is mounted on the upper connecting seat, and a protective housing is provided over the motor. The motor shaft is coaxially connected to the lead screw. By adopting the above technical solution, the components are compactly connected.

[0014] Furthermore, the upper end of the main shaft and the connecting plate together form a slider mounting part. The upper end of the slider mounting part has two rectangular inner surfaces, and the upper end of the lead screw slider has two rectangular outer surfaces and two arc-shaped outer surfaces. After the lead screw slider is installed in the slider mounting part, the two rectangular inner surfaces of the slider mounting part fit against the two rectangular outer surfaces of the slider, allowing the lead screw slider to slide within the slider mounting part. By adopting the above technical solution, the lead screw slider, lead screw, and main shaft are coaxial, resulting in a simple connection and compact structure.

[0015] Furthermore, from the inside to the outside, a copper sleeve, a steel sleeve, an epoxy rod, and a gun barrel are sequentially fitted onto the outer side of the main shaft. Each of these components has fixing holes, which are secured together by screws. An insulating sleeve is fitted over each fixing hole. The upper end of the gun barrel is fixedly connected to an upper connecting seat, and the middle part is fixedly connected to a lower connecting seat. A pin is provided on the main shaft, and a second sliding groove is provided on the copper and steel sleeves. When the main shaft moves up and down, the pin slides within the second sliding groove. A first spring is provided at the lower end of the main shaft, fitted onto the outside of the main shaft. The lower end of the first spring is fixedly connected to the lower end of the main shaft, and the upper end of the first spring is fixedly connected to the lower end of the steel sleeve. An epoxy sleeve is also provided at the lower end of the main shaft, fixedly connected to the lower end of the main shaft, and fitted onto the outside of the first spring. By adopting the above technical solution, the first spring facilitates the downward pressure of the main shaft during welding, pressing the pin into the molten pool and ensuring thorough adhesion to the workpiece.

[0016] Furthermore, the connecting plate is also fixedly connected with an upper sensor and a lower sensor for detecting whether the welding torch is malfunctioning. The upper sensor is horizontally positioned between the upper connecting block and the top surface of the lifting slider, and the lower sensor is horizontally positioned between the lower connecting block and the bottom surface of the lifting slider. Under normal circumstances, when the lifting slider is moved up and down, the welding torch moves accordingly, and neither the upper nor lower sensor detects the lifting slider. When the welding torch malfunctions and cannot be moved by the lifting slider, the upper or lower sensor can detect the lifting slider and trigger an alarm device to protect the welding torch and personnel safety. By adopting the above technical solution, welding torch operation can be stopped in time when a malfunction occurs, thus protecting both equipment safety and personal safety.

[0017] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Appendix Figure 1 : An exploded view of the stud welding torch of Embodiment 2 of the present invention;

[0020] Appendix Figure 2 : An internal schematic diagram of a stud welding gun according to Embodiment 2 of the present invention;

[0021] Appendix Figure 3 : Schematic diagram of the lead screw and slider connection structure for the stud welding gun in Embodiment 2 of the present invention;

[0022] Appendix Figure 4 : Figure 3 Enlarged view of point A;

[0023] Appendix Figure 5 : An exploded view of the stud welding torch of Example 3 of this invention;

[0024] Appendix Figure 6 : A schematic diagram of the internal structure of the stud welding gun of Example 3 of this invention;

[0025] Appendix Figure 7 : A schematic diagram of the overall structure of the stud welding gun of Example 3 of this invention;

[0026] Appendix Figure 8 : Figure 7 Enlarged view of point A;

[0027] Appendix Figure 9 : A schematic diagram of the screw slider and main shaft of the stud welding gun according to Embodiment 3 of the present invention;

[0028] Appendix Figure 10 : A schematic diagram of the lead screw slider for the stud welding gun in Embodiment 3 of the present invention;

[0029] Appendix Figure 11 : Schematic diagram of the spindle for the stud welding gun in Embodiment 3 of the present invention.

[0030] Reference numerals: 1001, Motor; 1011, Motor mounting plate; 1012, Motor protective shell; 1013, Lead screw; 1014, Upper connecting seat; 1015, Lower connecting seat; 1002, Lead screw slider; 1021, Lead screw connection part; 1022, Spindle connection part; 1023, Slide rail; 1024, Insulating sheet; 1003, Spindle; 1031, First spring; 1038, Spring base; 1035, Pin; 10 33. Copper sleeve; 1034. Steel sleeve; 1036. Second slide rail; 1041. Connecting plate; 1042. Gun barrel; 1043. Upper connecting block; 1044. Lower connecting block; 1045. Slide rod; 1046. Lifting slider; 1047. Upper spring; 1048. Lower spring; 1050. Upper sensor; 1051. Lower sensor; 1055. Connecting block; 1006. Stud clamping unit; 1007. Ceramic ring clamping unit;

[0031] 2016, Bearing housing; 2021, Rectangular outer surface; 2022, Arc-shaped outer surface; 2030, Connecting piece; 203, Slider mounting part; 2032, Rectangular inner surface; 2037, Epoxy rod; 2038, Gun barrel; 2039, Fixing hole; 2056, Insulating sleeve; 2057, Epoxy sleeve. Detailed Implementation

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example

[0034] An adjustable stud welding torch assembly includes a lifting unit, a lead screw slider, a main shaft, a stud clamping unit, and a positioning component. The lifting unit drives the lead screw slider to move up and down. The main shaft is mounted on the lead screw slider. The upper end of the stud clamping unit is fixedly connected to the lower end of the main shaft. The lowest surface of the positioning component is lower than the lowest surface of the stud clamping unit. The welding process is as follows:

[0035] The stud clamping unit stud is positioned such that the bottom surface of the positioning component is higher than the bottom surface of the stud. Figure 7-8 As shown, the distance between the bottom surface of the positioning component and the bottom surface of the stud (excluding the arc initiation point) is h1, and the height of the arc initiation point is h2;

[0036] After the stud contacts the welding point, move the welding gun assembly downwards until the positioning part contacts the workpiece. During this process, the lead screw slide continues to move downwards, and the main shaft is held in place by the stud and does not move. When the ceramic ring clamping unit contacts the welding point, stop moving the welding gun downwards. The height the welding gun moves downwards is equal to the distance between the main shaft and the lead screw slide. The distance between the main shaft and the lead screw slide of the stud with an arc initiation point is h1+h2, and the distance between the main shaft and the lead screw slide of the stud without an arc initiation point is h1.

[0037] Let the optimal arc-starting distance be h2+h3, where h3 is the distance between the bottom surface of the arc-starting point and the surface of the workpiece when the arc is started. Rotate the lead screw to raise the lead screw slider to a height of h1+h2+h3.

[0038] No arc initiation point: When the lead screw slider rises by h1, it contacts the connecting plate of the spindle of the stud without an arc initiation point. Subsequently, when the lead screw slider continues to rise by h2+h3, the lead screw slider drives the spindle and stud to rise by h2+h3 as well. At this time, the height at which the electric arc is induced at the bottom of the stud and the surface of the workpiece is h2+h3.

[0039] Including the arc initiation point: When the lead screw slider is raised by h1+h2, it contacts the main shaft of the stud containing the arc initiation point. Then, when the lead screw slider continues to be raised by h3, the lead screw slider drives the main shaft and stud to be raised by h3 as well. At this time, the height of the arc induced by the bottom of the stud (excluding the arc initiation point) and the surface of the substrate is h2+h3.

[0040] At this point, the distance between the base plate of the stud and the surface of the substrate, whether or not there is an arc initiation point, is the same, and the combustion space is consistent. When electricity is applied, an electric arc is generated to melt the bottom of the stud and the surface of the substrate, forming a molten pool. Subsequently, the motor is started to reverse the lead screw, the lead screw slider descends, and the spindle and stud are pressed into the molten pool due to gravity, completing the welding. Example

[0041] like Figure 1-4 As shown, a stud welding torch includes the adjustable arc-starting distance stud welding torch assembly and a mounting assembly as described in Embodiment 1. The mounting assembly includes a connecting plate 1041, a torch rod 1042, an upper connecting block 1043, a lower connecting block 1044, a slide rod 1045, and a lifting slider 1046. The connecting plate 1041 is connected to a motor 1001 and a lead screw 1013. The lifting slider 1046 is slidably connected to the slide rod 1045. The upper end of the slide rod 1045 is fixedly connected to the upper connecting block 1043, and the lower end of the slide rod 1045 is fixedly connected to the lower connecting block 1044. An upper spring is provided between the upper end of the lifting slider 1046 and the upper connecting block 1043. 1047. A lower spring 1048 is provided between the lower end of the lifting slider 1046 and the lower connecting block 1044. The upper connecting block 1043 and the lower connecting block 1044 are both fixedly connected to the connecting plate 1041. The upper connecting block 1043 and the lower connecting block 1044 are both provided with round holes for the gun rod 1042 to pass through. The gun rod 1042 passes through the round holes and passes through the upper connecting block 1043 and the lower connecting block 1044 and is fixedly connected to the upper connecting block 1043 and the lower connecting block 1044. A connecting block 1055 is provided at the lower end of the gun rod 1042. The gun rod 1042 is fixedly connected to the ceramic ring clamping unit 1007 through the connecting block 1055.

[0042] like Figure 3 As shown, the motor 1001 is mounted on the motor mounting plate 1011, which is mounted on the upper end of the connecting plate 1041. The motor 1001 is provided with a motor protective shell 1012. The motor shaft of the motor 1001 is fixedly connected to the lead screw 1013 through a coupling 1016. The lead screw 1013 is connected to an upper connecting seat 1014 and a lower connecting seat 1015. The upper connecting seat 1014 is mounted on the upper part of the connecting plate 1041, and the lower connecting seat 1015 is mounted on the lower end of the connecting plate 1041.

[0043] like Figure 3-4As shown, the lead screw slider 1002 includes a lead screw connecting part 1021, a main shaft connecting part 1022, a slide rail 1023, and an insulating sheet 1024. The insulating sheet 1024 is located between the lead screw connecting part 1021 and the main shaft connecting part 1022. The first slide groove 1049 is located on the side of the lead screw connecting part 1021 away from the insulating sheet 1024. The lead screw connecting part 1021, the main shaft connecting part 1022, the first slide groove 1049, and the insulating sheet 1024 are fixedly connected. The lead screw connection part 1021 is provided with a threaded hole for connecting the lead screw 1013, the spindle connection part 1022 is provided with a connecting round hole 1026 for the spindle 1003 to pass through, the connecting plate 1041 is provided with a first sliding groove 1049 on the side near the lead screw 1013, the first sliding groove 1049 is located between the upper connecting seat 1014 and the lower connecting seat 1015, and the slide rail 1023 of the lifting slider 1046 can be embedded in the first sliding groove 1049 to slide.

[0044] like Figure 1-4 As shown, a first spring 1031 is provided at the upper end of the main shaft 1003, and a stud connecting plate 1041 is provided at the lower end of the main shaft 1003. The upper end of the first spring 1031 is fixedly connected to the motor mounting plate 1011 through a spring insulating seat 1037, and the lower end of the first spring 1031 is fixedly connected to the main shaft 1003 through a spring base 1038. The spring base 1038 is fixedly connected to the upper end of the connecting piece 1030. The lifting slider 1046 is mounted on the main shaft 1003. A copper sleeve 1033 and a steel sleeve 1034 are fitted at the connection. The copper sleeve 1033 is fitted on the spindle 1003, and the steel sleeve 1034 is fitted on the copper sleeve 1033. The spindle connection part 1022 is fitted on the steel sleeve 1034. The copper sleeve 1033, the steel sleeve 1034 and the spindle connection part 1022 are relatively fixed. A pin 1035 is provided on the spindle 1003. The copper sleeve 1033 and the steel sleeve 1034 have a second slide groove 1036 for the pin 1035 to slide.

[0045] When the stud clamping unit 1006 and the ceramic ring clamping unit 1007 are equipped with studs and ceramic rings for welding operations, the lifting slider 1046 is pressed down. Under the action of the spring, the entire welding torch begins to move downward. The studs first contact the surface of the workpiece. As the lifting slider 1046 continues to be pressed down, the studs, the stud clamping unit 1006, and the main shaft 1003 stop moving downward. Other components continue to move downward, and the spring is compressed until the ceramic ring clamping unit 1007 and the ceramic ring contact the surface of the workpiece, at which point the lifting slider 1046 stops moving downward. Because the slide rail of the lead screw slider 1002 is embedded in the first slide groove 1049, the lead screw 1013 rotates. At this time, the lifting slider 1046 does not rotate with the lead screw 1013, but moves up and down on the lead screw 1013 and in the second slide groove 1036; when the motor 1001 is started, the lead screw 1013 rotates, and the lead screw slider 1002 moves upward. When it contacts the main shaft 1003, it drives the main shaft 1003 and the stud to move upward. When the arc-starting distance of the stud bottom surface is appropriate, it is energized to generate an electric arc to melt the bottom of the stud and the surface of the substrate, forming a molten pool. Subsequently, the motor 1001 is started to reverse the lead screw 1013, and the lead screw slider 1002 descends. The main shaft 1003 and the stud are pressed into the molten pool under the action of gravity and the restoring force of the first spring 1031, completing the welding.

[0046] The lifting slider 1046 can be connected to automated equipment such as robotic arms or mobile modules, and the automated equipment controls the welding torch by controlling the lifting slider 1046.

[0047] like Figure 1-2 As shown, an upper sensor 1050 and a lower sensor 1051 are also fixedly connected to the connecting plate 1041. The upper sensor 1050 is horizontally positioned between the upper connecting block 1043 and the top surface of the lifting slider 1046, and the lower sensor 1051 is horizontally positioned between the lower connecting block 1044 and the bottom surface of the lifting slider 1046. Under normal circumstances, when the lifting slider 1046 is moved up and down, the welding torch moves up and down accordingly, and neither the upper sensor 1050 nor the lower sensor 1051 can detect the lifting slider 1046.

[0048] In the event of a malfunction, such as welding performed incorrectly without clamping the stud, resulting in the stud clamping unit 1006 and the ceramic ring clamping unit 1007 being welded together with the workpiece, or the welding torch failing to move when the lifting slider 1046 is raised, the lifting slider 1046 rises and compresses the upper spring 1047. When the lifting slider 1046 and the upper sensor 1050 are at the same horizontal level, the upper sensor 1050 senses the lifting slider 1046, and the automated equipment stops moving the lifting slider 1046 upward and triggers an alarm device to protect the robotic arm or moving module and other automated equipment. Alternatively, if the automated equipment's programmed position is incorrect during welding, and the stud or ceramic ring clamping unit 1007 touches an obstacle below, the automated equipment continues to move the lifting slider 1046 downward. The welding torch remains stationary, the upper and lower springs compress, and when the lifting slider 1046 and the lower sensor 1051 are at the same horizontal level, the lower sensor 1051 senses the lifting slider 1046, and the automated equipment stops moving the lifting slider 1046 upward and triggers an alarm device to protect the robotic arm or moving module and other automated equipment. After the fault was manually eliminated and resolved, the automated equipment and welding torch continued to operate normally. Example

[0049] like Figure 5-11 As shown, a stud welding gun includes the adjustable arc-starting distance stud welding gun assembly and mounting assembly as described in Embodiment 1. The mounting assembly includes an upper connecting seat 1014, a lower connecting seat 1015, a gun rod 1042, and a connecting block 1055. The upper connecting seat 1014, the lower connecting seat 1015, and the connecting block 1055 are all provided with circular holes for the gun rod 1042 to pass through. The gun rod 1042 is fixedly connected to the upper connecting seat 1014, the lower connecting seat 1015, and the connecting block 1055 through the circular holes. The gun rod 1042 is fixedly connected to the ceramic ring clamping unit 1007 through the connecting block 1055. The motor 1001 is mounted on the upper connecting seat 1014. The motor 1001 is covered with a motor protective shell 1012. The motor shaft of the motor 1001 is coaxially fixedly connected to the lead screw 1013.

[0050] like Figure 9-11As shown, the upper end of the main shaft 1003 and the connecting piece 2030 together form a slider mounting part 203. The upper end of the slider mounting part 203 has two rectangular inner surfaces 2032, and the lower inner surface of the slider mounting part 203 is a stud. The upper end of the lead screw slider 1002 has two rectangular outer surfaces 2021 and two arc-shaped outer surfaces 2022, and the lower outer surface of the lead screw slider 1002 is a stud with a diameter equal to the diameter of the stud on the inner surface of the lower end of the slider mounting part 203. After the lead screw slider 1002 is installed in the slider mounting part 203, the two rectangular inner surfaces 2032 of the slider mounting part 203 are in contact with the two rectangular outer surfaces 2021 of the lead screw slider 1002, and the inner surface of the stud in the slider mounting part 203 is in contact with the outer surface of the stud in the lead screw slider 1002. The lead screw slider 1002 can slide within the slider mounting part 203.

[0051] like Figure 5-6 As shown, the main shaft 1003 is fitted with a copper sleeve 1033, a steel sleeve 1034, an epoxy rod 2037, and a gun barrel 2038 sequentially from the inside to the outside. Each of the copper sleeve 1033, steel sleeve 1034, epoxy rod 2037, and gun barrel 2038 is provided with a fixing hole 2039. The copper sleeve 1033, steel sleeve 1034, epoxy rod 2037, and gun barrel 2038 can be fixed together by connecting the fixing holes 2039 with screws. An insulating sleeve 2056 is fitted over the fixing holes 2039. The upper end of the barrel 2038 is fixedly connected to the upper connecting seat 1014, and the middle part of the barrel 2038 is fixedly connected to the lower connecting seat 1015. The main shaft 1003 is provided with a pin 1035, and the copper sleeve 1033 and the steel sleeve 1034 are provided with a second sliding groove 1036. When the main shaft 1003 moves up and down, the pin 1035 slides in the second sliding groove 1036. The lower end of the main shaft 1003 is provided with a first spring 1031, which is sleeved on the outside of the main shaft 1003. The lower end of the first spring 1031 is fixedly connected to the lower end of the main shaft 1003, and the upper end of the first spring 1031 is fixedly connected to the lower end of the steel sleeve 1034. The lower end of the main shaft 1003 is also provided with an epoxy sleeve 2057, which is fixedly connected to the lower end of the main shaft 1003 and is sleeved on the outside of the first spring 1031.

[0052] like Figure 5-6 As shown, the pin 1035 is fixedly connected to the main shaft 1003 and passes through the second slide groove 1036 of the copper sleeve 1033 and the steel sleeve 1034, thereby restricting the main shaft 1003 to slide up and down within the second slide groove 1036 and preventing it from rotating. The two rectangular inner sides 2032 of the slider mounting part 203 of the main shaft 1003 are in contact with the two rectangular outer sides 2021 of the lead screw slider 1002, thereby restricting the lead screw slider 1002 from rotating.

[0053] When the stud clamping unit 1006 and the ceramic ring clamping unit 1007 are equipped with studs and ceramic rings for welding operations, the upper connecting seat 1014 and the lower connecting seat 1015 are pressed down, and the entire welding torch begins to move downwards. The studs first contact the surface of the workpiece. As the upper connecting seat 1014 and the lower connecting seat 1015 continue to be pressed down, the studs, the stud clamping unit, and the main shaft 1003 stop moving downwards. Other components continue to move downwards, and the first spring 1031 is compressed until the ceramic ring clamping unit 1007 and the ceramic ring contact the surface of the workpiece. At this point, the pressure on the upper connecting seat 1014 and the lower connecting seat 1015 stops. Connecting seat 1015; starting motor 1001, lead screw 1013 rotates, lead screw slider 1002 moves upward. When lead screw slider 1002 contacts main shaft 1003, lead screw slider 1002 drives main shaft 1003 and stud to move upward. When the arc-starting distance of the stud bottom surface is appropriate, electricity is applied to generate an electric arc to melt the bottom of the stud and the surface of the substrate, forming a molten pool. Subsequently, starting motor 1001 reverses lead screw 1013, lead screw slider 1002 descends, and main shaft 1003 and stud are pressed into the molten pool under the action of gravity and the restoring force of the first spring 1031, completing the welding.

[0054] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A stud welding torch assembly with adjustable arc striking distance, characterized in that, The device includes a lifting unit, a lead screw slider (1002), a main shaft (1003), a stud clamping unit (1006), and a positioning component. The lifting unit drives the lead screw slider (1002) to move up and down. The main shaft (1003) is hung on the lead screw slider (1002). The upper end of the stud clamping unit (1006) is fixedly connected to the lower end of the main shaft (1003). The lowest surface of the positioning component is lower than the lowest surface of the stud clamping unit (1006).

2. A stud welding torch, characterized in that, Includes the adjustable arc-starting spacing stud welding torch assembly and mounting assembly as described in claim 1.

3. The stud welding gun according to claim 2, characterized in that, The mounting assembly includes a connecting plate (1041), a gun rod (1042), an upper connecting block (1043), a lower connecting block (1044), a slide rod (1045), and a lifting slider (1046). The connecting plate (1041) is connected to a motor (1001) and a lead screw (1013). The lifting slider (1046) is slidably connected to the slide rod (1045). The upper end of the slide rod (1045) is fixedly connected to the upper connecting block (1043), and the lower end of the slide rod (1045) is fixedly connected to the lower connecting block (1044). An upper spring (1047) is provided between the upper end of the lifting slider (1046) and the upper connecting block (1043), and an upper spring (1047) is provided between the lower end of the slider and the lower connecting block (1044). The lower spring (1048), the upper connecting block (1043) and the lower connecting block (1044) are both fixedly connected to the connecting plate (1041). The upper connecting block (1043) and the lower connecting block (1044) are both provided with round holes for the gun rod (1042) to pass through. The gun rod (1042) passes through the round holes and passes through the upper connecting block (1043) and the lower connecting block (1044) and is fixedly connected to the upper connecting block (1043) and the lower connecting block (1044). The lower end of the gun rod (1042) is provided with a connecting block (1055). The positioning element is a ceramic ring clamping unit (1007). The gun rod (1042) is fixedly connected to the ceramic ring clamping unit (1007) through the connecting block (1055).

4. The stud welding gun according to claim 3, characterized in that, The lifting unit includes a motor (1001) and a lead screw (1013). The motor (1001) is mounted on a motor mounting plate (1011), which is mounted on the upper end of a connecting plate (1041). The motor (1001) is provided with a motor protective shell (1012). The motor shaft of the motor (1001) is fixedly connected to the lead screw (1013) through a coupling (1016). The lead screw (1013) is connected to an upper connecting seat (1014) and a lower connecting seat (1015). The upper connecting seat (1014) is mounted on the upper part of the connecting plate (1041), and the lower connecting seat (1015) is mounted on the lower end of the connecting plate (1041).

5. The stud welding gun according to claim 4, characterized in that, The lead screw slider (1002) includes a lead screw connecting part (1021), a main shaft connecting part (1022), a slide rail (1023), and an insulating sheet (1024). The insulating sheet (1024) is located between the lead screw connecting part (1021) and the main shaft connecting part (1022). The slide rail (1023) is located on the side of the lead screw connecting part (1021) away from the insulating sheet (1024). The lead screw connecting part (1021), the main shaft connecting part (1022), the slide rail (1023), and the insulating sheet (1024) are fixedly connected. The lead screw connection part (1021) is provided with a threaded hole for connecting the lead screw (1013), the main shaft connection part (1022) is provided with a connecting round hole for the main shaft (1003) to pass through, the connecting plate (1041) is provided with a first slide groove (1049) on the side near the lead screw (1013), the first slide groove (1049) is located between the upper connecting seat (1014) and the lower connecting seat (1015), and the slide rail (1023) of the lead screw slider (1002) can be embedded in the first slide groove (1049) to slide.

6. The stud welding gun according to claim 5, characterized in that, The upper end of the main shaft (1003) is provided with a first spring (1031), and the lower end of the main shaft (1003) is provided with a stud connecting plate (1041). The upper end of the first spring (1031) is fixedly connected to the motor mounting plate (1011) through a spring insulating seat (1037), and the lower end of the first spring (1031) is fixedly connected to the main shaft (1003) through a spring base (1038). A copper sleeve (1033) and a steel sleeve are fitted on the main shaft (1003) at the slider connection. (1034) A copper sleeve (1033) is fitted on the main shaft (1003), a steel sleeve (1034) is fitted on the copper sleeve (1033), and a main shaft connecting part (1022) is fitted on the steel sleeve (1034). The copper sleeve (1033), the steel sleeve (1034) and the main shaft connecting part (1022) are relatively fixed. A pin is provided on the main shaft (1003). The copper sleeve (1033) and the steel sleeve (1034) have a second groove (1036) for the pin to slide.

7. The stud welding gun according to claim 2, characterized in that, The mounting assembly includes an upper connecting seat (1014), a lower connecting seat (1015), a gun barrel (1042), and a connecting block (1055). The upper connecting seat (1014), the lower connecting seat (1015), and the connecting block (1055) are all provided with a circular hole for the gun barrel (1042) to pass through. The gun barrel (1042) is fixedly connected to the upper connecting seat (1014), the lower connecting seat (1015), and the connecting block (1055) through the circular hole. The positioning element is a ceramic ring clamping unit (1007). The ceramic ring clamping unit (1007) is fixedly connected to the gun barrel (1042) through the connecting block (1055).

8. The stud welding gun according to claim 7, characterized in that, The lifting unit includes a motor (1001) and a lead screw (1013). The motor (1001) is mounted on the upper connecting seat (1014). The motor (1001) is covered with a motor protective shell (1012). The motor shaft of the motor (1001) is fixedly coaxially connected to the lead screw (1013).

9. The stud welding gun according to claim 8, characterized in that, The upper end of the main shaft (1003) is provided with a slider mounting part (203). The upper end of the slider mounting part (203) has two rectangular inner surfaces (2032). The upper end of the lead screw slider (1002) has two rectangular outer surfaces (2021) and two arc-shaped outer surfaces (2022). After the lead screw slider (1002) is installed in the slider mounting part (203), the two rectangular inner surfaces (2032) of the slider mounting part (203) are in contact with the two rectangular outer surfaces (2021) of the lead screw slider (1002). The lead screw slider (1002) can slide in the slider mounting part (203).

10. The stud welding gun according to claim 9, characterized in that, The main shaft (1003) is fitted with a copper sleeve (1033), a steel sleeve (1034), an epoxy rod (2037), and a gun barrel (2038) sequentially from the inside to the outside. Each of the copper sleeve (1033), steel sleeve (1034), epoxy rod (2037), and gun barrel (2038) has a fixing hole (2039). By connecting the fixing holes (2039) with screws, the copper sleeve (1033), steel sleeve (1034), epoxy rod (2037), and gun barrel (2038) can be fixed together. An insulating sleeve (2056) is fitted over the fixing hole (2039). The upper end of the gun barrel (2038) is fixedly connected to the upper connecting seat (1014), and the middle part of the gun barrel (2038) is fixedly connected to the lower connecting seat (1015). The main shaft (1003) has... A pin is provided, and a second slide groove (1036) is provided on the copper sleeve (1033) and the steel sleeve (1034). When the main shaft (1003) moves up and down, the pin slides in the second slide groove (1036). A first spring (1031) is provided at the lower end of the main shaft (1003). The first spring (1031) is sleeved on the outside of the main shaft (1003). The lower end of the first spring (1031) is fixedly connected to the lower end of the main shaft (1003). The upper end of the first spring (1031) is fixedly connected to the lower end of the steel sleeve (1034). An epoxy sleeve (2057) is also provided at the lower end of the main shaft (1003). The epoxy sleeve (2057) is fixedly connected to the lower end of the main shaft (1003). The epoxy sleeve (2057) is sleeved on the outside of the first spring (1031).

11. The stud welding gun according to claim 5, characterized in that, The connecting plate (1041) is also fixedly connected to an upper sensor (1050) and a lower sensor (1051) for detecting whether the welding torch is malfunctioning. The upper sensor (1050) is horizontally located between the upper connecting block (1043) and the top surface of the lifting slider (1046), and the lower sensor (1051) is horizontally located between the lower connecting block (1044) and the bottom surface of the lifting slider (1046). Under normal circumstances, when the lifting slider (1046) is moved up and down, the welding torch moves up and down accordingly, and the upper sensor (1050) or the lower sensor (1051) cannot detect the lifting slider (1046). When the welding torch malfunctions and the lifting slider (1046) cannot be moved, the upper sensor (1050) or the lower sensor (1051) can detect the lifting slider (1046) and trigger an alarm device to protect the welding torch and personal safety.

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