Stud welding gun assembly capable of adjusting arc striking distance and stud welding gun
By designing an adjustable arc-induced pitch mechanism in the stud welding torch assembly, the problem of inconsistent welding quality caused by the lack of arc-induced points in existing welding equipment is solved, and the uniformity of arc-induced pitch during welding is achieved and the welding quality is improved.
Patent Information
- Application Number
- CN202510494588.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-19
- Publication Date
- 2025-06-13
AI Technical Summary
When welding bolts and nails, some bolts lack arc-induced points, resulting in inconsistent arc-induced spacing, which affects the welding quality.
A stud welding torch assembly with adjustable arc pitch is designed. Through the cooperation of the lifting unit and the slider, the nails with or without arc pitch points have the same arc pitch spacing during welding, thereby ensuring that the combustion space is consistent.
By adjusting the arc-induced spacing, it is ensured that the consistent combustion conditions can be achieved during the welding process regardless of whether there are or not the arc-induced nails, which improves the uniformity and stability of welding quality.
Smart Images
Figure CN120133672A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of stud welding, and particularly relates to a stud welding gun assembly and a stud welding gun with adjustable arc starting distance. Background Art
[0002] In stud welding, there is an arc starting point at the bottom of the stud. Its main functions are to initiate the arc, stabilize the welding process, control the welding quality, and adapt to different welding conditions. The arc starting point is a small aluminum dot. The stud needs to be ignited from the middle first, and it disappears after ignition. It was mainly used for previous less advanced welding equipment. Existing welding equipment can generate large currents. Even without an arc starting point, as long as the arc starting distance is ensured, the welding quality can be ensured. During the process from stud production to use, due to transportation, handling, collisions, and other factors, the arc starting points of some studs will fall off.
[0003] Before welding a stud with an existing arc-type automatic welding equipment, the stud will be lifted from the welding surface by a fixed arc starting distance to initiate the arc for welding. However, since some studs have arc starting points and some do not, the arc starting distances are inconsistent during the welding process. The arc starting distance for studs with arc starting points is large, and the arc starting distance for studs without arc starting points is small. The set arc starting distance for the automatic welding gun is usually adapted to studs with arc starting points, resulting in insufficient combustion of the arc starting distance for studs without arc starting points and poor welding quality. Summary of the Invention
[0004] The present invention provides a stud welding gun assembly and a stud welding gun with adjustable arc starting distance to solve the problems raised in the above background art.
[0005] To achieve the above object, the present invention provides the following technical solutions: A stud welding gun assembly with adjustable arc starting distance includes a lifting unit, a slider, a main shaft, a stud clamping unit, and a positioning member. The lifting assembly drives the slider to move up and down. The main shaft is hung on the slider. The upper end of the stud clamping unit is fixedly connected to the lower end of the main shaft. The lowest horizontal height of the positioning member is lower than the lowest horizontal height of the stud clamping unit. By adopting the above technical solution, the slider and the main shaft are arranged to be relatively slidable. When the main shaft is lifted by the stud, the slider remains stationary. When the slider rises, it first rises to contact the main shaft connecting plate, and then drives the main shaft and the stud to rise, ensuring that the arc starting distances of studs with and without arc starting points are the same, the combustion spaces are consistent, and the unity of welding quality is improved.
[0006] A stud welding gun includes the above-mentioned stud welding gun assembly with adjustable arc starting distance and a mounting assembly.
[0007] Furthermore, the installation component includes a connecting plate, a gun rod, an upper connecting block, a lower connecting block, a sliding rod, and a sliding block. The connecting plate is connected to the motor and the lead screw. The sliding block 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 sliding block and the upper connecting block, and a lower spring is provided between the lower end of the sliding block and the lower connecting block. Both the upper connecting block and the lower connecting block are fixedly connected to the connecting plate. Both the upper connecting block and the lower connecting block are provided with round holes for the gun rod to pass through. The gun rod passes through the upper connecting block and the lower connecting block through the round holes and is fixedly connected to the upper connecting block and the lower connecting block. A connecting block is provided at the lower end of the gun rod. The positioning member is a porcelain ring clamping unit, and the gun rod is fixedly connected to the porcelain ring clamping unit through this connecting block. By adopting the above technical solution, the lifting slider slides to drive the welding gun to move up and down smoothly.
[0008] Furthermore, the motor is installed on a motor mounting plate, and the motor mounting plate is installed at the upper end of the connecting plate. A motor protection shell is provided outside the motor. The motor shaft of the motor is fixedly connected to the lead screw through a coupling. The upper and lower ends of the lead screw are connected to an upper connecting seat and a lower connecting seat respectively. The upper connecting seat is installed in the upper middle part of the connecting plate, and the lower connecting seat is installed at the lower end of the connecting plate. By adopting the above technical solution, the lead screw, the motor and other components are installed compactly.
[0009] Furthermore, the sliding block includes a lead screw connecting part, a main shaft connecting part, a sliding rail, and an insulating sheet. The insulating sheet is located between the lead screw connecting part and the main shaft connecting part. The sliding groove 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 sliding groove, and the insulating sheet are fixedly connected. A threaded hole for connecting the lead screw is provided on the lead screw connecting part, and a connecting round hole for the main shaft to pass through is provided on the main shaft connecting part. A sliding groove is provided on the connecting plate close to the lead screw side, and the sliding groove is located between the upper connecting seat and the lower connecting seat. The sliding rail of the sliding block can be embedded in the sliding groove for sliding. By adopting the above technical solution, the lead screw connecting part and the main shaft connecting part are separated to avoid mutual influence between the main shaft and the lead screw.
[0010] 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 sleeved on the main shaft at the connection part of the sliding block. The copper sleeve is sleeved on the main shaft, the steel sleeve is sleeved on the copper sleeve, and the main shaft connecting part is sleeved on the steel sleeve. The copper sleeve, the steel sleeve, and the main shaft connecting part are relatively fixed. A pin is provided on the main shaft, and sliding grooves for the pin to slide are provided on the copper sleeve and the steel sleeve. By adopting the above technical solution, setting the first spring is beneficial for the main shaft to press down the stud into the molten pool during welding, so as to fully adhere to the welded object.
[0011] Further, the installation component includes an upper connecting seat, a lower connecting seat, a gun barrel and a connecting block. The connecting seat, the lower connecting seat and the connecting block are all provided with round holes for the gun barrel to pass through. The gun barrel is fixedly connected to the connecting seat, the lower connecting seat and the connecting block through the round holes. The positioning member is a porcelain ring clamping unit, and the porcelain ring clamping unit is fixedly connected to the gun barrel through the connecting block. By adopting the above technical solution, when the bottom end of the porcelain ring clamping unit touches the welding object, the motor can be started for welding.
[0012] Further, the lifting unit includes a motor and a lead screw. The motor is installed on the upper connecting seat, and a motor protection shell is sleeved outside the motor. The motor shaft of the motor is fixedly and coaxially connected to the lead screw. By adopting the above technical solution, the components are tightly connected to each other.
[0013] Further, the upper end of the main shaft and the connecting plate together form a slider installation part. There are two rectangular inner sides at the upper end of the slider installation part, and the inner side at the lower end of the slider installation part is a stud. The upper end of the slider has two rectangular outer sides and two arc outer sides. After the slider is installed in the slider installation part, the two rectangular inner sides of the slider installation part are attached to the two rectangular outer sides of the slider, and the slider can slide in the slider installation part. By adopting the above technical solution, the slider, the lead screw and the main shaft are coaxial, the connection relationship is simple, and the structure is compact.
[0014] Further, a copper sleeve, a steel sleeve, an epoxy rod and a gun barrel are sequentially sleeved outside the main shaft from inside to outside. The copper sleeve, the steel sleeve, the epoxy rod and the gun barrel are all provided with fixing holes. The copper sleeve, the steel sleeve, the epoxy rod and the gun barrel can be fixed together by screwing the fixing holes. An insulating sleeve is sleeved outside the fixing hole. The upper end of the gun barrel is fixedly connected to the upper connecting seat, and the middle part of the gun barrel is fixedly connected to the lower connecting seat. A pin is provided on the main shaft, and chutes are provided on the copper sleeve and the steel sleeve. When the main shaft moves up and down, the pin slides in the chute. A spring is provided at the lower end of the main shaft. The spring is sleeved outside the main shaft, the lower end of the spring is fixedly connected to the lower end of the main shaft, and the upper end of the 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. The epoxy sleeve is fixedly connected to the lower end of the main shaft, and the epoxy sleeve is sleeved outside the spring. By adopting the above technical solution, setting the spring is beneficial to pressing the stud into the molten pool when the main shaft presses down during welding, so as to fully bond with the object to be welded.
[0015] Further, an upper sensor and a lower sensor for detecting whether the welding torch fails are fixedly connected to the connecting plate. The horizontal height of the upper sensor is located between the upper connecting block and the top surface of the lifting slider, and the horizontal height of the lower sensor is located between the lower connecting block and the bottom surface of the lifting slider. Under normal circumstances, when the lifting slider moves up and down, the welding torch moves up and down accordingly, and the upper sensor or the lower sensor cannot detect the lifting slider. When the welding torch fails and the lifting slider cannot move the welding torch, the upper sensor or the lower sensor can detect the lifting slider and trigger the alarm device to protect the welding torch and personal safety. By adopting the above technical solution, the welding torch operation is stopped in time in case of failure, which protects both the equipment safety and personal safety.
[0016] To make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given in conjunction with the accompanying drawings and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Attached Figure 1 : Explosion schematic diagram of the stud welding torch of Embodiment 2 of the present invention; Attached Figure 2 : Internal schematic diagram of a stud welding torch of Embodiment 2 of the present invention; Attached Figure 3 : Schematic diagram of the screw rod slider connection structure of the stud welding torch of Embodiment 2 of the present invention; Attached Figure 4 : Figure 3 Enlarged schematic diagram at position A of; Attached Figure 5 : Explosion schematic diagram of the stud welding torch of Embodiment 3 of the present invention; Attached Figure 6 : Internal structure schematic diagram of the stud welding torch of Embodiment 3 of the present invention; Attached Figure 7 : Overall structure schematic diagram of the stud welding torch of Embodiment 3 of the present invention; Attached Figure 8 : Figure 7 Enlarged schematic diagram at position A of; Attached Figure 9 : Schematic diagram of the screw rod slider and the main shaft of the stud welding torch of Embodiment 3 of the present invention; Attached Figure 10 : Schematic diagram of the screw rod slider of the stud welding torch of Embodiment 3 of the present invention; Appendix Figure 11 : Schematic diagram of the main shaft for the stud welding gun in Embodiment 3 of the present invention.
[0019] Appendix reference numerals: 1001, motor; 1011, motor mounting plate; 1012, motor protection shell; 1013, lead screw; 1014, upper connecting seat; 1015, lower connecting seat; 1002, slider; 1021, lead screw connecting part; 1022, main shaft connecting part; 1023, slide rail; 1024, insulating sheet; 1003, main shaft; 1031, first spring; 1038, spring base; 1035, pin; 1033, copper sleeve; 1034, steel sleeve; 1036, second chute; 1041, connecting plate; 1042, gun barrel; 1043, upper connecting block; 1044, lower connecting block; 1045, slide bar; 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. 2001, motor; 2012, motor protection shell; 2013, lead screw; 2014, upper connecting seat; 2015, lower connecting seat; 2016, bearing seat; 2002, lead screw slider; 2021, rectangular outer side; 2022, arc outer side; 2003, main shaft; 2030, connecting piece; 203, slider mounting part; 2031, first spring; 2032, rectangular inner side; 2033, copper sleeve; 2034, steel sleeve; 2035, pin; 2036, second chute; 2037, epoxy rod; 2038, gun barrel; 2042, gun barrel; 2055, connecting block; 2056, insulating sleeve; 2057, epoxy sleeve; 2006, stud clamping unit; 2007, ceramic ring clamping unit. Detailed implementation manners
[0020] In this application, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.
[0021] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly under and obliquely under the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature. Embodiment
[0022] A stud welding gun assembly with adjustable arc starting distance includes a lifting unit, a slider, a main shaft, a stud clamping unit and a positioning member. The lifting assembly drives the slider to move up and down. The main shaft is hung on the slider. The upper end of the stud clamping unit is fixedly connected to the lower end of the main shaft. The lowest horizontal height of the positioning member is lower than the lowest horizontal height of the stud clamping unit. The welding process is as follows: Clamp the stud with the stud clamping unit. The bottom surface of the positioning member is higher than the bottom surface of the stud. As Figures 7-8 shown, let the distance between the bottom surface of the positioning member and the bottom surface of the stud (excluding the arc starting point) be h1, and the height of the arc starting point be h2; After the stud contacts the welding point, move the welding gun assembly downward until the positioning member contacts the object to be welded. During this process, the screw rod slider keeps moving downward, and the main shaft is resisted by the stud and does not move. When the ceramic ring clamping unit contacts the welding point, stop moving the welding gun downward. The height of the downward movement of the welding gun is equal to the distance generated between the main shaft and the screw rod slider. The distance generated between the main shaft of the stud with an arc starting point and the screw rod slider is h1 + h2, and the distance generated between the main shaft of the stud without an arc starting point and the screw rod slider is h1; 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 object to be welded when the arc is initiated. Rotate the screw rod uniformly to lift the slider by a height of h1 + h2 + h3; Without an arc starting point: When the slider rises by h1, it contacts the connecting plate of the main shaft of the stud without an arc starting point. Subsequently, when the slider continues to rise by h2 + h3, the slider drives the main shaft and the stud to also rise by h2 + h3. At this time, the height at which the arc is initiated between the bottom of the stud and the surface of the object to be welded is h2 + h3. With an arc starting point: When the slider rises by h1 + h2, it contacts the main shaft of the stud with an arc starting point. Subsequently, when the slider continues to rise by h3, the slider drives the main shaft and the stud to also rise by h3. At this time, the height at which the arc is initiated between the bottom (excluding the arc starting point) of the stud and the surface of the base material is h2 + h3.
[0023] At this time, the distances between the stud base plate with or without the arc starting point and the substrate surface are the same, and the combustion spaces are consistent. An electric current is applied to generate an arc to melt the bottom of the stud and the substrate surface, forming a molten pool. Subsequently, the motor is started to reverse the lead screw, the slider descends, and the main shaft and the stud are pressed into the molten pool due to gravity to complete the welding. Embodiment
[0024] As Figures 1-4 shown, a stud welding gun includes a stud welding gun assembly with adjustable arc starting spacing and a mounting assembly described in Embodiment 1. The mounting assembly includes a connecting plate 1041, a gun barrel 1042, an upper connecting block 1043, a lower connecting block 1044, a slide bar 1045, and a lifting slider 1046. The connecting plate 1041 is connected to the motor 1001 and the lead screw 1013. The lifting slider 1046 is slidably connected to the slide bar 1045. The upper end of the slide bar 1045 is fixedly connected to the upper connecting block 1043, and the lower end of the slide bar 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 a lower spring 1048 is provided between the lower end of the lifting slider 1046 and the lower connecting block 1044. Both the upper connecting block 1043 and the lower connecting block 1044 are fixedly connected to the connecting plate 1041. Both the upper connecting block 1043 and the lower connecting block 1044 are provided with round holes for the gun barrel 1042 to pass through. The gun barrel 1042 passes through the upper connecting block 1043 and the lower connecting block 1044 through the round holes 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 barrel 1042, and the gun barrel 1042 is fixedly connected to the ceramic ring clamping unit 1007 through the connecting block 1055.
[0025] As Figure 3 shown, the motor 1001 is installed on the motor mounting plate 1011, the motor mounting plate 1011 is installed at the upper end of the connecting plate 1041, a motor protection shell 1012 is provided outside the motor 1001, the motor shaft of the motor 1001 is fixedly connected to the lead screw 1013 through a coupling 1016, the upper and lower ends of the lead screw 1013 are connected to an upper connecting seat 1014 and a lower connecting seat 1015, the upper connecting seat 1014 is installed in the upper middle part of the connecting plate 1041, and the lower connecting seat 1015 is installed at the lower end of the connecting plate 1041.
[0026] As Figures 3-4As shown, the lead screw slider 1002 includes a lead screw connection part 1021, a main shaft connection part 1022, a slide rail 1023 and an insulating sheet 1024. The insulating sheet 1024 is located between the lead screw connection part 1021 and the main shaft connection part 1022. The first chute 1049 is located on the side of the lead screw connection part 1021 away from the insulating sheet 1024. The lead screw connection part 1021, the main shaft connection part 1022, the first chute 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, and the main shaft connection part 1022 is provided with a connection round hole 1026 for the main shaft 1003 to pass through. The first chute 1049 is provided on the side of the connecting plate 1041 close to the lead screw 1013. The first chute 1049 is located between the upper connection seat 1014 and the lower connection seat 1015. The slide rail 1023 of the lifting slider 1046 can be embedded in the first chute 1049 for sliding.
[0027] As Figures 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. A copper sleeve 1033 and a steel sleeve 1034 are sleeved on the main shaft 1003 at the connection of the lifting slider 1046. The copper sleeve 1033 is sleeved on the main shaft 1003, the steel sleeve 1034 is sleeved on the copper sleeve 1033, and the main shaft connection part 1022 is sleeved on the steel sleeve 1034. The copper sleeve 1033, the steel sleeve 1034 and the main shaft connection part 1022 are relatively fixed. A pin 1035 is provided on the main shaft 1003, and a second chute 1036 for the pin 1035 to slide is provided on the copper sleeve 1033 and the steel sleeve 1034.
[0028] 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 and lowering slider 1046 is pressed down. Under the action of the spring, the entire welding torch starts to move downward. The stud first contacts the surface of the workpiece to be welded. Continuing to press down the lifting and lowering slider 1046, the stud, the stud clamping unit 1006, and the main shaft 1003 stop moving downward, while other components continue to move downward, compressing the spring until the ceramic ring clamping unit 1007 and the ceramic ring contact the surface of the workpiece to be welded, and then stop pressing down the lifting and lowering slider 1046; Since the sliding rail part of the lead screw slider 1002 is embedded in the first chute 1049, when the lead screw 1013 rotates, the lifting and lowering slider 1046 does not rotate with the lead screw 1013, but moves up and down on the lead screw 1013 and within the second chute 1036; The motor 1001 is started, and the lead screw 1013 rotates. 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 until the arc ignition distance at the bottom of the stud is appropriate. Then, 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 1001 is reversed to rotate the lead screw 1013, the lead screw slider 1002 descends, and 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 to complete the welding.
[0029] The lifting and lowering slider 1046 can be connected to automated devices such as robotic arms or moving modules. The automated device controls the welding torch by controlling the lifting and lowering slider 1046.
[0030] As Figures 1-2 shown, an upper sensor 1050 and a lower sensor 1051 are also fixedly connected to the connecting plate 1041. The horizontal height of the upper sensor 1050 is located between the upper connecting block 1043 and the top surface of the lifting and lowering slider 1046, and the horizontal height of the lower sensor 1051 is located between the lower connecting block 1044 and the bottom surface of the lifting and lowering slider 1046. Under normal circumstances, when the lifting and lowering slider 1046 is moved up and down, the welding torch follows the movement up and down, and the upper sensor 1050 or the lower sensor 1051 cannot detect the lifting and lowering slider 1046.
[0031] When a fault occurs, for example, when the stud is not clamped and the stud clamping unit 1006 and the ceramic ring clamping unit 1007 are welded to the workpiece by wrong power-on during welding, or when the welding torch cannot move when the lifting slider 1046 is lifted, etc., the lifting slider 1046 rises to compress the upper spring 1047. When the lifting slider 1046 and the upper sensor 1050 are at the same horizontal height, the upper sensor 1050 senses the lifting slider 1046, and the automated equipment stops lifting the lifting slider 1046 and triggers the alarm device to protect automated equipment such as the robotic arm or the moving module; or, when the programmed position of the automated equipment is incorrect during welding and the obstacle is touched under the stud or ceramic ring clamping unit 1007, the automated equipment continues to lower the lifting slider 1046, the welding torch does not move, and the upper and lower springs are compressed. When the lifting slider 1046 and the lower sensor 1051 are at the same horizontal height, the lower sensor 1051 senses the lifting slider 1046, and the automated equipment stops lifting the lifting slider 1046 and triggers the alarm device to protect automated equipment such as the robotic arm or the moving module. After the fault is manually removed and solved, the automated equipment and the welding torch continue to work normally. Embodiment
[0032] As Figures 5-11 shown, a stud welding torch includes the stud welding torch assembly with adjustable arc starting distance described in Embodiment 1 and the mounting assembly. The mounting assembly includes an upper connecting seat 2014, a lower connecting seat 2015, a gun barrel 2042, and a connecting block 2055. The upper connecting seat 2014, the lower connecting seat 2015, and the connecting block 2055 are all provided with round holes for the gun barrel 2042 to pass through. The gun barrel 2042 is fixedly connected to the upper connecting seat 2014, the lower connecting seat 2015, and the connecting block 2055 through the round holes. The gun barrel 2042 is fixedly connected to the ceramic ring clamping unit 2007 through the connecting block 2055. The motor 2001 is installed on the upper connecting seat 2014, and a motor protection shell 2012 is sleeved outside the motor 2001. The motor shaft of the motor 2001 is coaxially and fixedly connected to the lead screw 2013.
[0033] As Figures 9-11As shown, the upper end of the main shaft 2003 and the connecting piece 2030 together form a slider mounting portion 203. There are two rectangular inner sides 2032 at the upper end of the slider mounting portion 203, and the inner side at the lower end of the slider mounting portion 203 is a stud. The upper end of the lead screw slider 2002 has two rectangular outer sides 2021 and two arc-shaped outer sides 2022, and the outer side at the lower end of the lead screw slider 2002 is a stud, whose diameter is equal to the diameter of the inner side stud of the lower end of the slider mounting portion 203. After the lead screw slider 2002 is installed in the slider mounting portion 203, the two rectangular inner sides 2032 of the slider mounting portion 203 are in contact with the two rectangular outer sides 2021 of the lead screw slider 2002, and the inner side of the stud of the slider mounting portion 203 is in contact with the outer side of the stud of the lead screw slider 2002. The lead screw slider 2002 can slide within the slider mounting portion 203.
[0034] As Figures 5-6 As shown, a copper sleeve 2033, a steel sleeve 2034, an epoxy rod 2037, and a barrel 2038 are sequentially sleeved on the outside of the main shaft 2003 from inside to outside. The copper sleeve 2033, the steel sleeve 2034, the epoxy rod 2037, and the barrel 2038 are all provided with fixing holes 2039. The copper sleeve 2033, the steel sleeve 2034, the epoxy rod 2037, and the barrel 2038 can be fixed together by screwing through the fixing holes 2039. An insulating sleeve 2056 is sleeved outside the fixing holes 2039. The upper end of the barrel 2038 is fixedly connected to the upper connecting seat 2014, and the middle part of the barrel 2038 is fixedly connected to the lower connecting seat 2015. A pin 2035 is provided on the main shaft 2003, and a second chute 2036 is provided on the copper sleeve 2033 and the steel sleeve 2034. When the main shaft 2003 moves up and down, the pin 2035 slides within the second chute 2036. A first spring 2031 is provided at the lower end of the main shaft 2003. The first spring 2031 is sleeved on the outside of the main shaft 2003. The lower end of the first spring 2031 is fixedly connected to the lower end of the main shaft 2003, and the upper end of the first spring 2031 is fixedly connected to the lower end of the steel sleeve 2034. An epoxy sleeve 2057 is further provided at the lower end of the main shaft 2003. The epoxy sleeve 2057 is fixedly connected to the lower end of the main shaft 2003. The epoxy sleeve 2057 is sleeved on the outside of the first spring 2031.
[0035] As Figures 5-6 As shown, the pin 2035 is fixedly connected to the main shaft 2003 and passes through the second chute 2036 of the copper sleeve 2033 and the steel sleeve 2034, thereby restricting the main shaft 2003 to only slide up and down within the second chute 2036 and not rotate. The two rectangular inner sides 2032 of the slider mounting portion 203 of the main shaft 2003 are in contact with the two rectangular outer sides 2021 of the lead screw slider 2002, thereby restricting the lead screw slider 2002 from rotating.
[0036] When the stud clamping unit 2006 and the ceramic ring clamping unit 2007 are equipped with studs and ceramic rings for welding operations, press down the upper connecting seat 2014 and the lower connecting seat 2015. The entire welding torch starts to move downward. The stud first contacts the surface of the object to be welded. Continue to press down the upper connecting seat 2014 and the lower connecting seat 2015. The stud, the stud clamping unit, and the main shaft 2003 stop moving downward, and other components continue to move downward. The first spring 2031 is compressed until the ceramic ring clamping unit 2007 and the ceramic ring contact the surface of the object to be welded. Then stop pressing down the upper connecting seat 2014 and the lower connecting seat 2015. Start the motor 2001, the lead screw 2013 rotates, and the lead screw slider 2002 moves upward. When the lead screw slider 2002 contacts the main shaft 2003, the lead screw slider 2002 drives the main shaft 2003 and the stud to move upward until the arc ignition distance at the bottom of the stud is appropriate. Then, an electric arc is generated to melt the bottom of the stud and the surface of the base material, forming a molten pool. Subsequently, start the motor 2001 to reverse the lead screw 2013, the lead screw slider 2002 descends, and the main shaft 2003 and the stud are pressed into the molten pool under the action of gravity and the restoring force of the first spring 2031 to complete the welding.
[0037] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements should also be regarded as within the protection scope of the present invention.
Claims
1. A stud welding gun assembly with adjustable arc striking distance, characterized in that: It comprises a lifting unit, a screw slider (1002, 2002), a main shaft (1003, 2003), a bolt clamping unit (1006, 2006) and a positioning member, wherein the lifting assembly drives the screw slider (1002, 2002) to move up and down, the main shaft (1003, 2003) is hung on the screw slider (1002, 2002), the upper end of the bolt clamping unit (1006, 2006) is fixedly connected to the lower end of the main shaft (1003, 2003), and the lowest surface level of the positioning member is lower than the lowest surface level of the bolt clamping unit (1006, 2006).
2. A stud welding gun, characterized in that: The invention comprises a stud welding gun assembly with adjustable arc striking distance as claimed in claim 1 and a mounting assembly.
3. The stud welding gun according to claim 2, characterized in that: The mounting assembly comprises a connecting plate (1041), a gun rod (1042), an upper connecting block (1043), a lower connecting block (1044), a sliding rod (1045) and a lifting slider (1046); the connecting plate (1041) is connected to the motor (1001) and the screw rod (1013); the lifting slider (1046) is slidably connected to the sliding rod (1045); the upper end of the sliding rod (1045) is fixedly connected to the upper connecting block (1043); the lower end of the sliding 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 a spring (1048) is provided between the lower end of the slider and the lower connecting block (1044). A lower spring (1047), 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 a circular hole for the gun rod (1042) to pass through, the gun rod (1042) passes through the upper connecting block (1043) and the lower connecting block (1044) through the circular hole 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 (1049), the positioning member is a ceramic ring clamping unit (1007), and the gun rod (1042) is fixedly connected to the ceramic ring clamping unit (1007) through the connecting block (1049).
4. The stud welding gun according to claim 3, characterized in that: The lifting unit comprises a motor (1001) and a screw rod (1013); the motor (1001) is mounted on a motor mounting plate (1011); the motor mounting plate (1011) is mounted on the upper end of a connecting plate (1041); a motor protection shell (1012) is provided outside the motor (1001); a motor (1001) shaft of the motor (1001) is fixedly connected to the screw rod (1013) via a coupling (1016); an upper connecting seat (1014) and a lower connecting seat (1015) are connected to the upper and lower ends of the screw rod (1013); the upper connecting seat (1014) is mounted on the upper middle portion 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 screw rod slider (1002) comprises a screw rod connection part (1021), a main shaft connection part (1022), a slide rail (1023) and an insulating sheet (1024); the insulating sheet (1024) is located between the screw rod connection part (1021) and the main shaft connection part (1022); the slide rail (1023) is located on a side of the screw rod connection part (1021) away from the insulating sheet (1024); the screw rod connection part (1021), the main shaft connection part (1022), the slide rail (1023) and the insulating sheet (1024) are fixedly connected. The screw rod connecting part (1021) is provided with a threaded hole for connecting the screw rod (1013), the main shaft connecting part (1022) is provided with a connecting circular hole for the main shaft (1003) to pass through, and the connecting plate (1041) is provided with a first slide groove (1049) on the side close to the screw rod (1013), and 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 screw rod 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: A first spring (1047) is provided at the upper end of the main shaft (1003), a stud connection plate (1041) is provided at the lower end of the main shaft (1003), the upper end of the first spring (1047) is fixedly connected to the motor mounting plate (1011) via a spring insulating seat (1037), the lower end of the first spring (1047) is fixedly connected to the main shaft (1003) via a spring base (1038), and a copper sleeve (1033) and a steel sleeve are sleeved at the slider connection on the main shaft (1003). (1034), the copper sleeve (1033) is sleeved on the main shaft (1003), the steel sleeve (1034) is sleeved on the copper sleeve (1033), the main shaft connecting part (1022) is sleeved 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), and a second slide groove (1036) for the pin to slide is provided on the copper sleeve (1033) and the steel sleeve (1034).
7. The stud welding gun according to claim 2, characterized in that: The mounting assembly comprises an upper connecting seat (2014), a lower connecting seat (2015), a gun rod (2042) and a connecting block (2055); the upper connecting seat (2014), the lower connecting seat (2015) and the connecting block (2055) are all provided with a circular hole for the gun rod (2042) to pass through; the gun rod (2042) is fixedly connected to the upper connecting seat (2014), the lower connecting seat (2015) and the connecting block (2055) through the circular hole; the positioning member is a ceramic ring clamping unit (2007); the ceramic ring clamping unit (2007) is fixedly connected to the gun rod (2042) through the connecting block (2055).
8. The stud welding gun according to claim 7, characterized in that: The lifting unit comprises a motor (2001) and a screw rod (2013); the motor (2001) is mounted on an upper connecting seat (2014); a motor protective shell (212) is provided on the outer cover of the motor (2001); and a motor shaft of the motor (2001) is fixedly coaxially connected to the screw rod (2013).
9. The stud welding gun according to claim 8, characterized in that: The upper end of the main shaft (2003) is provided with a slider mounting portion (203), the upper end of the slider mounting portion (203) has two rectangular inner side surfaces (2032), the upper end of the screw slider (2006) has two rectangular outer side surfaces (2021) and two arc outer side surfaces (2022), after the screw slider (2006) is mounted on the slider mounting portion (203), the two rectangular inner side surfaces (2032) of the slider mounting portion (203) are fitted with the two rectangular outer side surfaces (2021) of the screw slider (2006), and the screw slider (2006) can slide in the slider mounting portion (203).
10. The stud welding gun according to claim 9, characterized in that: The outer side of the main shaft (2003) is sequentially sleeved with a copper sleeve (2033), a steel sleeve (2034), an epoxy rod (2037) and a gun barrel (2038) from the inside to the outside. The copper sleeve (2033), the steel sleeve (2034), the epoxy rod (2037) and the gun barrel (2038) are all provided with fixing holes (2039). The copper sleeve (2033), the steel sleeve (2034), the epoxy rod (2037) and the gun barrel (2038) can be fixed together by connecting the fixing holes (2039) with screws. The outer cover of the fixing hole (2039) is provided with an insulating sleeve (2056). The upper end of the gun barrel (2038) is fixedly connected to the upper connecting seat (214), and the middle part of the gun barrel (2038) is fixedly connected to the lower connecting seat (215). The main shaft (2003) is provided with a A pin is provided, and a second slide groove (2036) is provided on the copper sleeve (2033) and the steel sleeve (2034). When the main shaft (2003) moves up and down, the pin slides in the second slide groove (2036). A first spring (2031) is provided at the lower end of the main shaft (2003). The first spring (2031) is sleeved on the outside of the main shaft (2003). The lower end of the first spring (2031) is fixedly connected to the lower end of the main shaft (2003). The upper end of the first spring (2031) is fixedly connected to the lower end of the steel sleeve (2034). An epoxy sleeve (2057) is also provided at the lower end of the main shaft (2003). The epoxy sleeve (2057) is fixedly connected to the lower end of the main shaft (2003). The epoxy sleeve (2057) is sleeved on the outside of the first spring (2031).
11. The stud welding gun according to claim 5, characterized in that: The connecting plate (1041) is also fixedly connected with an upper sensor (1050) and a lower sensor (1051) for detecting whether a welding gun has a fault. The upper sensor (1050) is located at a horizontal height between the upper connecting block (1043) and the top surface of the lifting slider (1046), and the lower sensor (1051) is located at a horizontal height between the lower connecting block (1044) and the bottom surface of the lifting slider (1046). Under normal circumstances, the welding gun moves up and down with the lifting slider (1046), and the upper sensor (1050) or the lower sensor (1051) cannot detect the lifting slider (1046). When the welding gun fails 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 gun and personal safety.