CN104227203B - Adjustable self adaptation stud welding gun - Google Patents

Abstract

The invention discloses an adjustable self-adaptive stud welding torch. A main shaft body, a moving iron core, a fixed sleeve and a static iron core are arranged in the cavity of the welding torch shell. In the shaft sleeve, the main shaft body is connected with the integrated chuck seat. The moving iron core is inserted from the front end of the fixed sleeve, and the static iron core is inserted from the rear end of the fixed sleeve. There is a lifting gap between the moving and static iron cores. There is a reset structure in the body, a drive shaft that is electrically insulated from the main shaft body at the end of the main shaft body, and an adaptive structure is set between the main shaft body and the drive shaft; The connecting hole, the driving shaft is inserted into the connecting hole, the adjustment distance is set between the main shaft body and the moving iron core, and the locking structure is arranged between the driving shaft and the moving iron core; mechanism. The invention has the advantages of simple structure, flexible and reliable axial movement of the main shaft body and constant lifting clearance.

Description

Adjustable Adaptive Stud Welding Gun

technical field

The invention relates to a stud welding torch, in particular to an adjustable self-adaptive stud welding torch.

Background technique

The current common stud welding gun has a structure: a welding torch housing with a cavity, in which a main shaft body, a moving iron core, a fixed sleeve with a coil inside and a static The iron core is also provided with a control circuit device for supplying working current to the main shaft body and the coil in the welding torch housing. The linear bearing can slide axially in the linear bearing; the main shaft body is sleeved with a return spring that can reset the main shaft body after arc ignition, and the two ends of the return spring are respectively against the outer flange of the main shaft body and the fixed Between the sleeves, the front end of the main shaft body is connected with the integrated chuck seat for installing the stud, the tail end of the moving iron core is inserted from the front end of the fixed sleeve and can slide in the fixed sleeve, and the front end of the static iron core is inserted from the rear end of the fixed sleeve And installed at the end of the fixed sleeve, there is a vacant gap between the moving iron core and the static iron core. The vacant gap is called the lifting gap. The lifting gap is an important factor to ensure that the arc is generated during stud welding. .

The main disadvantages of the stud welding torch with the above structure are: (1) Since the linear bearing is easy to wear, the gap between the linear bearing and the main shaft body will increase with the increase of use time, making it easy to cause weld deviation during welding. arc phenomenon, and when the main shaft body slips in the worn linear bearing, it is easy to form a groove on the surface of the main shaft body, and in serious cases, the main shaft body and the linear bearing will be stuck; During use, due to factors such as machining errors, installation errors, and thermal deformation of the torch shell, the concentricity of the shaft sleeve and the fixed sleeve will not be high, which will cause the main shaft body and the moving iron core to be fixedly connected head to tail. The resistance increases during axial movement, which greatly increases the amount of wear between the main shaft body and the shaft sleeve, as well as between the moving iron core and the fixed sleeve. In severe cases, the moving iron core will be stuck in the fixed sleeve or the moving iron core cannot be inserted into the In the fixed sleeve, the axial movement of the spindle body cannot be realized, resulting in the failure of the welding work; (3) Before starting the welding work, put the stud into the integrated chuck seat after the aluminum sleeve is set on the head of the welding torch, Then point the welding torch head down so that the front end of the aluminum sleeve is pressed against the plate. At this time, the front end of the stud is also pressed against the plate. Since the main shaft body and the moving iron core are fixedly connected, the stud cannot be fixed during processing. There will be machining errors to avoid. When the actual length of the stud is slightly longer, the stud will compress the spring through the main shaft body and slide towards the tail end, so that the lifting gap between the moving iron core and the static iron core will become smaller, so that the welding arc will start When the arc striking distance is shortened, it is prone to the phenomenon that the arc cannot be struck, which greatly reduces the qualified rate of welding, and the welding efficiency is relatively low.

Contents of the invention

The technical problem to be solved by the present invention is to provide an adjustable self-adaptive stud welding torch that has a simple structure, can ensure smooth and reliable axial movement of the main shaft body, and can maintain a set lifting gap.

In order to solve the above problems, the technical solution adopted by the present invention is: the adjustable self-adaptive stud welding torch includes: a welding torch housing with a cavity, in which a main shaft body, a moving iron are arranged in sequence from front to end The core, the fixed sleeve with the coil and the static iron core are arranged inside, and the control circuit device that provides the working current for the main shaft body and the coil is also arranged in the welding torch shell, and the shaft that is electrically insulated from the main shaft body is fixed in the cavity. The main shaft body is installed in the shaft sleeve and can slide axially in the shaft sleeve. The front end of the main shaft body is connected with the integrated chuck seat used to install the stud. The tail end of the moving iron core is inserted from the front end of the fixed sleeve and can be Axially slide in the fixed sleeve, the front end of the static iron core is inserted from the rear end of the fixed sleeve and installed on the rear end of the fixed sleeve, there is a lifting gap between the moving iron core and the static iron core, and there is a device in the welding torch shell that can be used The resetting structure of the main shaft body reset after arc striking is provided with a drive shaft electrically insulated from the main shaft body at the tail end of the main shaft body, and a drive shaft is provided between the main shaft body and the drive shaft to allow the drive shaft to adjust its own position, so that the moving iron The self-adaptive structure that the core can drive the spindle body to move axially smoothly through the drive shaft; a connection hole matching the drive shaft is provided at the front end of the moving iron core, and the drive shaft is inserted into the connection hole and can slide axially in the connection hole , there is an adjustment distance between the main shaft body and the moving iron core, and a locking structure that can lock the driving shaft in the connection hole is arranged between the driving shaft and the moving iron core; between the static iron core and the moving iron core An adjustment mechanism for adjusting the position of the static iron core to adjust the lifting gap is provided.

Further, in the aforementioned adjustable self-adaptive stud welding torch, a wear-resistant bush made of copper powder PTFE rod is fixedly arranged in the shaft sleeve, and the wear-resistant bush and the main shaft body are electrically insulated from each other, and the main shaft body wears It is arranged in the wear-resistant bush and can slide axially in the wear-resistant bush.

Further, the aforementioned adjustable self-adaptive stud welding torch, wherein the adjustment mechanism is: a static iron core set in the shape of a bolt, and a first threaded hole capable of screwing with the static iron core is provided in the fixed sleeve , the static iron core is screwed on the end of the fixed sleeve, and a lock nut is screwed on the static iron core. The lock nut is located between the fixed sleeve and the flange at the end of the static iron core. The lock nut can lock the static iron core Tightly fit in the retaining sleeve.

Further, in the aforementioned adjustable self-adaptive stud welding torch, a guide rod is provided at the tail end of the moving iron core, and a guide hole matched with the guide rod is provided at the front end of the static iron core, and the guide rod is inserted into the guide hole and It can slide in the guide hole, and the movable iron core can be suspended in the fixed sleeve, and can guide the movable iron core suspended in the fixed sleeve to slide axially when the movable iron core moves relative to the static iron core.

Further, the aforementioned adjustable self-adaptive stud welding torch, wherein the locking structure is: a connecting block fixedly arranged at the front end of the moving iron core, a locking cover is movably sleeved on the connecting block, and the drive shaft is sequentially After passing through the through hole on the locking cover and the connecting block, insert it into the connecting hole. The locking cover is a flat cylinder with a second cavity inside. A closed shielding piece, the shielding piece blocks the connecting shield in the second cavity of the lock cover, so that the lock cover can be inclined relative to the connecting shield but the connecting shield will not fall out of the second cavity, and the inclined The locking cover can lock the driving shaft; the shaft sleeve and the main shaft body are electrically insulated from each other, a reset stopper capable of positioning the locking cover is arranged in the welding torch housing, and a second return spring is sleeved on the moving iron core. The two ends of the two return springs respectively lean against the outer flange of the lock cover and the fixing sleeve; under the action of the second return spring, the lock cover can lean against the reset stopper, and at this time, the drive shaft can be in the connecting hole Freely slide axially.

Further, the aforementioned adjustable self-adaptive stud welding torch, wherein the self-adaptive structure includes: a fixed block arranged at the tail end of the main shaft body, the fixed block is insulated and connected with the main shaft body, and a radial In the T-shaped groove, a movable block that can fit in the T-shaped groove is arranged at the front end of the drive shaft, and the movable block can move radially in the T-shaped groove, so that the drive shaft can move radially relative to the main shaft body.

Further, in the aforementioned adjustable self-adaptive stud welding gun, there is a certain adjustment gap between the movable block embedded in the T-shaped groove and the T-shaped groove in the axial and radial directions, so that the movable block It can be inclined relative to the T-shaped groove without falling out of the T-shaped groove, so that the drive shaft can be inclined relative to the main shaft body.

Further, in the aforementioned adjustable self-adaptive stud welding gun, an insulating seat is provided between the main shaft body and the fixed block, and the front end of the insulating seat is embedded in the tail end of the main shaft body; a second screw is provided at the front end of the fixed block, A second threaded hole screwed with the second screw rod is provided at the tail end of the insulating seat, and the second screw rod is screwed into the second threaded hole, thereby screwing the fixing block to the tail end of the insulating seat.

Further, in the aforementioned adjustable self-adaptive stud welding torch, a telescopic adjustment chamber is provided in the shaft sleeve, and a rectangular block-shaped installation block is arranged between the main shaft body and the insulating seat, and the installation block is arranged in the telescopic adjustment chamber. and can axially slide in the telescopic adjustment cavity, and the installation block is connected with the control circuit device through a flexible cable.

Further, the aforementioned adjustable self-adaptive stud welding torch, wherein, the reset structure is: a first reset spring sleeved on the drive shaft, and the two ends of the first reset spring respectively abut against the insulating seat and the end of the telescopic adjustment cavity on the inner side of the end.

The beneficial effect of the present invention is: the structure is simple, and when the shaft sleeve and the fixed sleeve have different shaft centers during use, the drive shaft can automatically adjust the position of the drive shaft relative to the main shaft body through an adaptive structure, thereby ensuring that the moving iron core drives the main shaft body During the axial movement, the main shaft body and the shaft sleeve are coaxial, and the moving iron core and the fixed sleeve are also coaxial, which greatly reduces the wear amount between the main shaft body and the shaft sleeve, as well as between the moving iron core and the fixed sleeve, and makes the shaft of the main shaft body The direction movement is flexible and reliable, and there will be no stuck phenomenon. The setting of the locking structure ensures that the lifting gap after setting will not change due to the machining error of the stud length, so as to ensure that the arc striking distance between the top of the stud and the plate remains unchanged during welding arc striking. After welding, the height of the welding leg is basically the same and there will be no phenomenon of failure to strike the arc. The welding quality is good and the pass rate of welding is high, basically no rework is required, and the welding efficiency is greatly improved.

Description of drawings

Fig. 1 is a structural schematic diagram of an adjustable self-adaptive stud welding gun according to the present invention.

Fig. 2 is a schematic structural view of the main shaft in Fig. 1 .

Fig. 3 is a schematic diagram of the structure in the right view direction in Fig. 2 .

Fig. 4 is a structural schematic diagram showing the radial offset between the main shaft body and the drive shaft shown in the plan view direction in Fig. 2 .

FIG. 5 is a schematic diagram of the structure in which the axes of the main shaft body and the drive shaft in FIG. 2 are staggered.

Fig. 6 is a structural schematic view showing that the drive shaft on the main shaft body in Fig. 1 can freely slide axially in the connecting hole.

FIG. 7 is a schematic diagram of the structure of the locking cover and the connecting block shown in the direction A-A in FIG. 6 .

Fig. 8 is a structural schematic diagram of mutual locking of the driving shaft on the main shaft body and the moving iron core.

detailed description

The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

As shown in Figure 1, the adjustable self-adaptive stud welding torch of the present invention includes: a welding torch housing 6, in which a main shaft body 1, a moving iron core 7, The fixed sleeve 8 and the static iron core 9 of the coil are arranged inside, and the control circuit device for supplying the working current to the main shaft body 1 and the coil is also arranged in the welding torch housing 6, and the mutual electrical connection between the main shaft body 1 and the main shaft body 1 is fixedly arranged in the cavity. Insulated shaft sleeve 5, the main shaft body 1 is penetrated in the shaft sleeve 5 and can slide axially in the shaft sleeve 5; The grinding bush 14, the wear-resistant bush 14 and the main shaft body 1 are electrically insulated from each other. The wear-resistant bushing 14 made of copper powder PTFE rod has the properties of non-conductivity, toughness, and the friction force between the wear-resistant bushing 14 and the main shaft body 1 is almost zero when the two are relatively moving, so as to ensure the main shaft body 1. It can slide flexibly in the axial direction in the wear-resistant bush 14, and there will be no phenomenon of arc deviation of the weld seam during welding. The front end of the main shaft body 1 is connected with the integrated chuck seat 12 for installing studs; There is a third threaded hole screwed with the third screw rod 13 , and the integrated chuck seat 12 is screwed on the front end of the main shaft body 1 . The tail end of the moving iron core 7 is inserted from the front end of the fixed sleeve 8 and can slide axially in the fixed sleeve 8, and the static iron core 9 is inserted from the tail end of the fixed sleeve 8 and installed on the tail end of the fixed sleeve 8. There is a lifting gap between the core 7 and the static iron core 9, and a reset structure capable of resetting the main shaft body 1 after arc striking is provided in the torch housing 6, and a joint with the main shaft body 1 is provided at the tail end of the main shaft body 1. The electrically insulated drive shaft 2 is provided between the main shaft body 1 and the drive shaft 2 to enable the drive shaft 2 to adjust its own position, so that the moving iron core 7 can drive the main shaft body 1 to move axially smoothly through the drive shaft 2 Adaptive structure; the front end of the moving iron core 7 is provided with a connecting hole 71 matched with the driving shaft 2, the driving shaft 2 is inserted into the connecting hole 71 and can slide axially in the connecting hole 71, the main shaft body 1 and the moving iron core 7 is provided with an adjustment spacing, the adjustment spacing described in this embodiment is the distance between the tail end of the drive shaft 2 and the bottom of the connecting hole 71, and a gap between the drive shaft 2 and the moving iron core 7 can be set. A locking structure in which the drive shaft 2 is locked in the connecting hole 71 . An adjustment mechanism for adjusting the position of the static iron core 9 to adjust the lifting gap is arranged between the static iron core 9 and the fixed sleeve 8 .

The adjustment mechanism described in this embodiment is: a bolt-shaped static iron core 9, a first threaded hole capable of screwing with the static iron core 9 is provided in the fixed sleeve 8, and the static iron core 9 is screwed on The tail end of the fixed sleeve 8 is screwed with a lock nut 10 on the static iron core 9, and the lock nut 10 is located between the tail end flange of the fixed sleeve 8 and the static iron core 9, and the lock nut 10 can hold the static iron The core 9 is locked in the fixed sleeve 8 . In this embodiment, a guide rod 75 is provided at the tail end of the moving iron core 7, and a guide hole 91 matched with the guide rod 75 is provided at the front end of the static iron core 9. The guide rod 75 is inserted into the guide hole 91 and can Slide in the guide hole 91. The guide rod 75 acts as a guiding correction, and enables the moving iron core 7 to be suspended in the fixed sleeve 8, and when the moving iron core 7 moves relative to the static iron core 9, it can guide the axis of the moving iron core 7 suspended in the fixed sleeve 8. When the moving iron core 7 slides axially relative to the fixed sleeve 8, there is almost no wear between the two, and the contact area between the guide rod 75 and the guide hole 91 is small, so the friction between the two is also small , which can effectively prolong the service life of the moving iron core 7 and the fixed sleeve 8.

As shown in Fig. 6, Fig. 7 and Fig. 8, in this embodiment, the locking structure is as follows: a connecting block 73 fixedly arranged at the front end of the moving iron core 7, and a lock is movably sleeved on the connecting block 73. The tight cover 74 is provided with a front and rear through hole in the middle of the connecting block 73 and the locking cover 74, and the drive shaft 2 is inserted into the connecting hole 71 after passing through the through holes on the locking cover 74 and the connecting block 73 in turn. , the locking cover 74 is a flat cylinder with a second cavity inside, and a shielding piece 741 that half-opens and half-closes the second cavity is provided at the tail end of the locking cover 74, and the shielding piece 741 blocks the connecting piece 73 In the second cavity of the locking cover 74, the locking cover 74 can be inclined relative to the connecting block 73 but the connecting block 73 can not fall out of the second cavity, and the inclined locking cover 74 can drive the shaft 2 locking; the welding torch housing 1 is provided with a reset flap 52 capable of positioning the locking cover 74. In this embodiment, the reset flap 52 is connected with the shaft sleeve 5 as a whole, and the reset flap 52 is located on the shaft sleeve 5 end of . A second return spring 102 is sheathed on the moving iron core 7, and the two ends of the second return spring 102 respectively abut against the outer flange 742 of the locking cover 74 and the fixed sleeve 8; under the action of the second return spring 102 The locking cover 74 can abut against the reset block 52 , and at this time, the drive shaft 2 can freely slide axially in the through hole between the locking cover 74 and the connecting block 73 and the connecting hole 71 .

As shown in Figure 2 and Figure 3, in this embodiment, the adaptive structure includes: a fixed block 3 arranged at the tail end of the main shaft body 1, the fixed block 3 is insulated and connected with the main shaft body 1, and at the tail end of the fixed block 3 A radial T-shaped groove is provided, and a movable block 21 that can fit in the T-shaped groove is arranged at the front end of the drive shaft 2. The movable block 21 can move radially in the T-shaped groove, so that the drive shaft 2 can move radially relative to the main shaft body 1 to adjust its position. In this embodiment, there is a certain adjustment clearance in the axial and radial directions between the movable block 21 fitted in the T-shaped groove and the T-shaped groove, so that the movable block 21 can be inclined relative to the T-shaped groove. It will not fall out of the T-shaped groove, so that the drive shaft 2 can be inclined relative to the main shaft body 1 . In this embodiment, an insulating seat 4 is provided between the main shaft body 1 and the fixed block 3, and the front end of the insulating seat 4 is embedded in the tail end of the main shaft body 1; in actual production, on the side wall of the main shaft body 1 tail A threaded through hole is provided, and a fourth threaded hole is provided on the side wall of the insulating seat 4 corresponding to the threaded through hole. Fasteners such as screws 41 tighten the front end of the insulating seat 4 through the threaded through hole and the fourth threaded hole. Fixed on the tail end of the main shaft body 1. A second screw rod 31 is provided at the front end of the fixed block 3, and a second threaded hole screwed with the second screw rod 31 is provided at the tail end of the insulating seat 4, and the second screw rod 31 is screwed in the second threaded hole, thereby the The fixed block 3 is screwed on the tail end of the insulating seat 4 . In this embodiment, a telescopic adjustment cavity 51 is provided in the shaft sleeve 5, and a rectangular block-shaped installation block 11 is also provided between the main shaft body 1 and the insulating seat 4. The installation block 11 is arranged in the telescopic adjustment cavity 51 and can Slide axially in the telescopic adjustment cavity 51, as shown in Figure 2, the installation block 11 is fixedly installed on the tail end of the main shaft body 1, the front end of the insulating seat 4 is embedded in the tail end of the installation block 11, and on the side of the installation block 11 A threaded through hole is provided on the wall, and a fourth threaded hole is provided on the side wall of the insulating seat 4 corresponding to the threaded through hole. Fasteners such as screws 41 connect the insulating seat 4 through the threaded through hole and the fourth threaded hole The front end is fastened to the tail end of the mounting block 11 . The installation block 11 is connected with the control circuit device through a flexible cable, and provides working current to the main shaft body 1 through the control circuit device.

In this embodiment, the reset structure is: the first reset spring 101 set on the drive shaft 2, and the two ends of the first reset spring 101 respectively abut against the inner surface of the tail end of the insulating seat 4 and the telescopic adjustment cavity 51 .

The working principle of the adjustment mechanism is as follows: When it is necessary to adjust the lifting gap between the moving iron core 7 and the static iron core 9, first loosen the lock nut 10, and then rotate the static iron core 9 to adjust the lifting gap between the static iron core 9 and the moving iron core. After the lifting gap between 7 reaches the required length, tighten the lock nut 10, and lock the static iron core 9 in the fixed sleeve 8, thereby locking the adjusted lifting gap.

The working principle of the locking structure is as follows: Before starting the welding work, set the aluminum sleeve 61 on the head of the welding torch. The tip of the gun is downward so that the front end of the aluminum sleeve 61 is pressed against the plate. At this time, the front end of the stud is also pressed against the plate. In actual production, in order to protect the molten pool, a ceramic is usually placed on the plate welding position The ceramic ring surrounds the outside of the stud, and then the front end of the aluminum sleeve 61 is pressed against the ceramic ring. When the actual length of the stud is slightly longer, the stud will push the main shaft body 1 to overcome the elastic force of the first back-moving spring 101 and slide toward the tail end. 2 will also slide towards the tail end of the connecting hole 71, so that the main shaft body 1 can use the axial adjustment distance to realize the backward axial displacement, and the moving iron core 7 will not move, so that the moving iron core 7 can be guaranteed The position of the stud will not be changed due to the machining error of the stud, so that the lifting gap between the moving iron core 7 and the static iron core 9 remains unchanged. During welding, the coil is energized through the control circuit device, and the welding current is also provided to the stud through the main shaft body 1. After the coil is energized, a magnetic field is generated in the fixed sleeve 8 to make the moving iron core 7 approach the static iron core 9 until the moving iron core 7 Touch together with static iron core 9. At the initial stage when the moving iron core 7 approaches the static iron core 9, as shown in FIG. The trend of the blocking sheet 73, and the blocking sheet 741 will block the connecting blocking sheet 73 and prevent the locking cover 74 from disengaging from the connecting blocking sheet 73, which will tilt forward the part of the locking cover 74 that is not blocked by the blocking sheet 741 and thereby be compressed on the locking cover 74. On the drive shaft 2, at this time, the drive shaft 2 is locked in the connecting hole 71 by friction between the inclined locking cover 74 and the drive shaft 2, forcing the drive shaft 2 and the moving iron core 7 to slide towards the tail end together, This lifts the stud to create an arc, forming a molten pool between the plate and the stud. After the molten pool is formed, the coil is powered off, and the magnetic field in the fixed sleeve 8 disappears. Under the action of the second return spring 102, the moving iron core 7 is far away from the static iron core 9 until it returns to its original position, and the main shaft body 1 is reset in the first position. Under the action of the spring 101, it will also return to its original position. At the initial stage when the main shaft body 1 is about to return to its original position, as shown in FIG. The hole returns to its original position and no longer presses the drive shaft 2, so that the drive shaft 2 inserted into the connecting hole 71 can slide freely in the axial direction of the connecting hole 71 without restraint, and the unconstrained drive shaft 2 will not hinder the main shaft The body 1 returns to its original position, so that the main shaft body 1 and the stud can be pressed against the plate in time until a welded joint is formed.

The working principle of the adaptive structure is as follows: when working, the moving iron core 7 drives the main shaft body 1 to move axially through the drive shaft 2 to complete the stud welding work. In the actual welding process, when the axes of the shaft sleeve 5 and the fixed sleeve 8 are radially staggered, as shown in Figure 4, the movable block 21 will move radially in the T-shaped groove, so that the main shaft body 1 and the drive The axes of the two shafts 2 are radially staggered to ensure that the fixed sleeve 8 will not interfere with the axial sliding of the moving iron core 7 and the shaft sleeve 5 will not interfere with the axial sliding of the main shaft body 1, so that the moving iron core 7 can smoothly It slides axially in the fixed sleeve 8 and drives the main shaft body 1 to slide axially in the sleeve 5 smoothly through the drive shaft 2 . When the axes of the shaft sleeve 5 and the fixed sleeve 8 are staggered, as shown in Figure 5, the movable block 21 is inclined at a certain angle relative to the T-shaped groove, so that the axes of the main shaft body 1 and the drive shaft 2 are staggered. Ensure that the fixed sleeve 8 will not interfere with the axial sliding of the moving iron core 7 and the shaft sleeve 5 will not interfere with the axial sliding of the main shaft body 1, so that the moving iron core 7 can slide axially in the fixed sleeve 8 smoothly, and The main shaft body 1 is driven by the drive shaft 2 to slide axially in the shaft sleeve 5 smoothly. When the axial space of the shaft sleeve 5 and the fixed sleeve 8 are staggered, the movable block 21 moves radially in the T-shaped groove, and the movable block 21 can be inclined at a certain angle relative to the T-shaped groove, so that the main shaft body 1 and The axes of the drive shaft 2 are staggered in space to ensure that the fixed sleeve 8 will not interfere with the axial sliding of the moving iron core 7 and the shaft sleeve 5 will not interfere with the axial sliding of the main shaft body 1, so that the moving iron core 7 can smoothly It slides axially in the fixed sleeve 8 and drives the main shaft body 1 to slide axially in the sleeve 5 smoothly through the drive shaft 2 .

The advantages of the present invention are: simple structure, when the shaft sleeve 5 and the fixed sleeve 8 have different axial centers during use, the drive shaft 2 can automatically adjust the position of the drive shaft 2 relative to the main shaft body 1 through an adaptive structure, ensuring that the fixed sleeve 8 It will not interfere with the axial sliding of the moving iron core 7 and the shaft sleeve 5 will not interfere with the axial sliding of the main shaft body 1, which greatly reduces the wear between the main shaft body 1 and the shaft sleeve 5 as well as between the moving iron core 7 and the fixed sleeve 8 , so that the axial movement of the main shaft body 1 is flexible and reliable, and no jamming phenomenon occurs. The setting of the locking structure ensures that the lifting gap after setting will not change due to the machining error of the stud length, so as to ensure that the arc striking distance between the top of the stud and the plate remains unchanged during welding arc striking. After welding, the height of the welding leg is basically the same and there will be no phenomenon of failure to strike the arc. The welding quality is good and the pass rate of welding is high, basically no rework is required, and the welding efficiency is greatly improved.

Claims (10)

1. Adjustable self-adaptive stud welding torch, including: a welding torch housing with a cavity, in which a main shaft body, a moving iron core, a fixed sleeve with a coil and a static iron core are arranged in sequence from front to end in the cavity, A control circuit device that provides working current to the main shaft body and the coil is also arranged in the welding torch housing. A shaft sleeve is fixedly arranged in the cavity. The main shaft body is passed through the shaft sleeve and can slide axially in the shaft sleeve. The front end of the body is connected with the integrated chuck seat for installing the stud, the tail end of the moving iron core is inserted from the front end of the fixed sleeve and can slide axially in the fixed sleeve, the front end of the static iron core is inserted from the rear end of the fixed sleeve and installed in the At the tail end of the fixed sleeve, there is a lifting gap between the moving iron core and the static iron core, and a reset structure that can reset the main shaft body after arc ignition is arranged in the welding torch shell. It is characterized in that: a There is a drive shaft that is electrically insulated from the main shaft body, and there is an adaptive device between the main shaft body and the drive shaft that enables the drive shaft to adjust its own position, so that the moving iron core can drive the main shaft body to move axially smoothly through the drive shaft. Structure; there is a connection hole matched with the drive shaft at the front end of the moving iron core, the drive shaft is inserted into the connection hole and can slide axially in the connection hole, an adjustment distance is set between the main shaft body and the moving iron core, and the drive shaft A locking structure capable of locking the drive shaft in the connection hole is provided between the moving iron core; an adjustment mechanism for adjusting the position of the static iron core to adjust the lifting gap is arranged between the static iron core and the moving iron core. 2. The adjustable self-adaptive stud welding torch according to claim 1, characterized in that: a wear-resistant bush made of copper powder PTFE rod is fixedly arranged in the shaft sleeve, and the wear-resistant bush and the main shaft body are mutually Electrically insulated, the main shaft body is installed in the wear-resistant bush and can slide axially in the wear-resistant bush. 3. According to the adjustable self-adaptive stud welding torch according to claim 1, it is characterized in that: the described adjustment mechanism is: a static iron core set in the shape of a bolt, and a screw capable of rotating with the static iron core is arranged in the fixed sleeve. The first threaded hole that fits, the static iron core is screwed on the end of the fixed sleeve, and a lock nut is screwed on the static iron core, the lock nut is located between the fixed sleeve and the flange at the end of the static iron core, and the lock nut The static iron core can be locked in the fixed sleeve. 4. The adjustable self-adaptive stud welding torch according to claim 1, characterized in that: a guide rod is provided at the tail end of the moving iron core, and a guide hole matched with the guide rod is provided at the front end of the static iron core to guide The rod is inserted into the guide hole and can slide in the guide hole, and the moving iron core can be suspended in the fixed sleeve. When the moving iron core moves relative to the static iron core, it can guide the moving iron core suspended in the fixed sleeve in the axial direction slide. 5. The adjustable self-adaptive stud welding torch according to claim 1, characterized in that: the locking structure is: a connecting block fixedly arranged at the front end of the moving iron core, and a lock is movably sleeved on the connecting block The tight cover, the drive shaft passes through the through holes on the lock cover and the connecting block in turn and then inserts into the connection hole. The lock cover is a flat cylinder with a second cavity inside, and a second cavity is arranged at the end of the lock cover. The second cavity is a half-open and half-closed blocking piece, the blocking piece blocks the connecting block in the second cavity of the locking cover, so that the locking cover can be inclined relative to the connecting block but the connecting block will not fall out of the second cavity cavity, and the inclined locking cover can lock the drive shaft; the shaft sleeve and the main shaft body are electrically insulated from each other, a reset stopper capable of positioning the locking cover is set in the welding torch shell, and a set is set on the moving iron core. The second return spring, the two ends of the second return spring lean against the outer flange and the fixed sleeve of the lock cover respectively; under the action of the second return spring, the lock cover can lean against the reset catch. The shaft can freely slide axially in the connecting hole. 6. According to the adjustable self-adaptive stud welding torch according to claim 1, 2, 3, 4 or 5, it is characterized in that: the self-adaptive structure comprises: a fixed block arranged at the tail end of the main shaft body, the fixed block and the main shaft Body insulation connection, a radial T-shaped groove is provided at the end of the fixed block, and a movable block that can fit in the T-shaped groove is arranged at the front end of the drive shaft. The movable block can move radially in the T-shaped groove. Movement, so that the drive shaft can move radially relative to the main shaft body. 7. According to the adjustable self-adaptive stud welding torch according to claim 6, it is characterized in that: there are certain gaps in the axial and radial directions between the movable block embedded in the T-shaped groove and the T-shaped groove. The gap is adjusted so that the movable block can tilt relative to the T-shaped groove but not fall out of the T-shaped groove, so that the drive shaft can tilt relative to the main shaft body. 8. The adjustable self-adaptive stud welding gun according to claim 6, characterized in that: an insulating seat is arranged between the main shaft body and the fixed block, and the front end of the insulating seat is embedded in the tail end of the main shaft body; A second screw rod is provided, and a second threaded hole screwed with the second screw rod is provided at the end of the insulating seat, and the second screw rod is screwed into the second threaded hole, so that the fixing block is screwed on the end of the insulating seat . 9. The adjustable self-adaptive stud welding torch according to claim 8, characterized in that: a telescopic adjustment cavity is provided in the shaft sleeve, and a rectangular block-shaped mounting block is also provided between the main shaft body and the insulating seat. The block is arranged in the telescopic adjustment cavity and can slide axially in the telescopic adjustment cavity, and the installation block is connected with the control circuit device through a flexible cable. 10. The adjustable self-adaptive stud welding torch according to claim 9, characterized in that: the reset structure is: a first return spring set on the drive shaft, and the two ends of the first return spring respectively abut against the insulating The inner side of the seat and the tail end of the telescopic adjustment chamber.