CN212350732U

CN212350732U - Gun body assembly and stud welding gun with same

Info

Publication number: CN212350732U
Application number: CN202021801727.7U
Authority: CN
Inventors: 胡长建; 邓显红
Original assignee: Zhejiang Shangshi Automatic Welding Technology Co ltd
Current assignee: Zhejiang Shangshi Automatic Welding Technology Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-01-15
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a rifle body subassembly and contain double-screw bolt welder of this rifle body subassembly, wherein rifle body subassembly, including the rifle head, metal connecting piece, a rifle section of thick bamboo, first insulating tube, the second connecting seat, the axle sleeve, the second spring, dabber and dabber hoist mechanism, metal connecting piece is connected to the upper end of rifle head, the dabber is connected to metal connecting piece's upper end, first insulating tube is established to the peripheral cover in lower part of dabber, second spring housing is in dabber outer wall and in first insulating tube, first insulating tube passes through the fastener and is connected with dabber relatively fixed, second spring one end is connected in first insulating tube, the other end of second spring is direct or indirect connection in the axle sleeve, the upper portion periphery from interior to exterior of dabber is overlapped in proper order and is established the bearing, axle sleeve and rifle section of thick bamboo, the direct or indirect second connecting seat of connecting in dabber upper end, directly or indirect. The utility model discloses a rifle body subassembly compact structure is ingenious, and the dabber removes smoothly conveniently, and it is stable accurate to reset, is favorable to promoting.

Description

Gun body assembly and stud welding gun with same

Technical Field

The utility model relates to a rifle body subassembly and contain double-screw bolt welder of this rifle body subassembly.

Background

The bolt welding gun is a high-speed implantation welding method for welding one end of a stud (welding nail/stud) on the surface of a plate (or a pipe fitting), wherein the arc stud welding uses the stud (welding nail/stud) as an electrode, uses welding arc as a heat source, uses a porcelain ring as a protective component, stably burns between the stud and the welding part (the plate or the pipe fitting) through the welding arc, heats a welding zone of the welding part to form a molten pool, and inserts the stud into the molten pool under the pressure of a welding gun after a melting layer is formed at the end part of the stud, so that liquid metal is extruded into a forming groove of the porcelain ring, and a joint is formed. Bolt welding guns are widely used in high-rise steel structure buildings, industrial factory building, highways, railways, bridges, towers, automobiles, energy sources, transportation facility buildings, airports, stations, power stations, pipeline supports, crane machinery and other steel structure constructions.

The inventor of this application discovers at research and development in-process, current stud welder, and its rifle body subassembly structure is complicated, and the promotion of dabber, removal and reset are inconvenient, and buffering effect is poor etc. exist and improve the space.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rifle body subassembly and the double-screw bolt welder who contains this rifle body subassembly can solve one or more technical problem in the background art at least, are favorable to popularizing and applying.

The rifle body subassembly, including the rifle head, the metal connecting piece, a rifle section of thick bamboo, first insulating tube, the second connecting seat, the axle sleeve, the second spring, dabber and dabber hoist mechanism, the metal connecting piece is connected to the upper end of rifle head, the dabber is connected to the upper end of metal connecting piece, first insulating tube is established to the peripheral cover in lower part of dabber, the second spring housing is at spindle outer wall and in first insulating tube, first insulating tube passes through fastener and dabber relatively fixed's being connected, second spring one end is connected in first insulating tube, the other end of second spring is directly or indirectly connected in the axle sleeve, the peripheral from interior to exterior of upper portion of dabber overlaps in proper order and establishes the bearing, axle sleeve and a rifle section of thick bamboo, the second connecting seat is directly or indirectly connected to the dabber upper end, directly.

Through adopting above-mentioned technical scheme, under the effect of bearing, axle sleeve, the dabber can reciprocate for a gun section of thick bamboo, and under the effect of second spring, the dabber resets fast and stably, also can play the cushioning effect to a certain extent, and dabber hoist mechanism can be used to the promotion of dabber, and whole rifle body subassembly compact structure is ingenious, and the facilitate promotion is used.

As a further improvement, the second connecting seat is tubular structure, second connecting seat bottom is provided with the flange of inside extension, install insulating seat in the second connecting seat, insulating seat is stairstepping tubular structure, the lower part of insulating seat is the small dimension section, upper portion is the jumbo size section, the junction is the step form, the flange department that the junction of step form was taken in the second connecting seat, the small dimension section of insulating seat stretches out in the second connecting seat, insulating seat cover is peripheral in the upper end of dabber, the upper end of dabber has the flange, the flange overlap joint of dabber upper end is on insulating seat. Through adopting above-mentioned technical scheme, the dabber is reliably convenient with being connected of second connecting seat, and insulating effect is good. The concrete structure setting of insulating seat is favorable to guaranteeing the insulating effect between dabber and the second connecting seat, and makes overall structure compact.

As a further improvement, the insulating seat is provided with a second gasket, the second gasket is made of insulating material, and the second gasket is located on the top surface of the mandrel and is located between the mandrel and the first metal piece. Through adopting above-mentioned technical scheme, can be with insulating between first metalwork and the dabber, then can further guarantee the insulating effect between dabber and the gun barrel.

As a further improvement, the outer wall of the second connecting seat is provided with a buffer strip, a channel for the activity of the buffer strip is arranged on the gun barrel, a buffer is further arranged on the gun barrel below the channel, and the buffer strip is arranged above the buffer. Through adopting above-mentioned technical scheme, the setting of buffering strip and buffer is favorable to buffering the dabber, makes the welding more stable.

As a further improvement, the outer wall of dabber is provided with the round pin axle, sets up the second through-hole that supplies the round pin axle to reciprocate on the lateral wall of bearing, sets up the third through-hole that supplies the round pin axle to reciprocate on the lateral wall of axle sleeve, and the second through-hole aligns in the third through-hole, and in the end of round pin axle stretched into second through-hole and third through-hole, second through-hole and third through-hole were rectangular shape through-hole, only supplied the round pin axle to reciprocate, and can not make dabber and bearing take place relative rotation. Through adopting above-mentioned technical scheme, the cooperation setting of round pin axle and second through-hole, third through-hole can make the dabber move about only for the barrel but not relative rotation.

As a further improvement of the utility model, the mandrel lifting mechanism comprises an electromagnet assembly, the electromagnet assembly comprises a coil bottom cover, a coil body, a coil box and a second metal piece, the coil box is arranged at the upper part of the inner cavity of the gun barrel, the coil body is positioned in the coil box, the outer wall of the coil body is wound with a coil, the coil bottom cover is connected with the bottom of the inner wall of the coil box and is positioned below the coil body, the second metal piece is connected with the coil body, the lower part of the second metal piece is positioned in the coil body, the upper part of the first metal piece is positioned in the coil body, a gap is arranged between the upper end surface of the first metal piece and the lower end surface of the second metal piece, the upper end of the first metal piece is connected with a second guide rod, the upper portion of the second guide rod penetrates through the second metal piece, and the first metal piece, the second guide rod and the second metal piece are coaxially arranged. Through adopting above-mentioned technical scheme, the second metalwork can produce magnetism in order to attract first metalwork after the coil circular telegram among the electromagnet assembly to promote the dabber.

As a further improvement, a gun barrel top is provided with the second metalwork lid, and the second metalwork lid is connected on the coil box, and the peripheral cover of second metalwork is equipped with the fifth spring, and fifth spring one end is connected in the second metalwork, and the coil box is connected to the other end. Through adopting above-mentioned technical scheme, the fifth spring provides tension between second metalwork and the coil box to guarantee the firm connection of second metalwork and not become flexible.

As a further improvement, the mandrel lifting mechanism comprises a first lifting component, the first lifting component comprises a first motor, a lead screw and a slide seat, the output shaft of the first motor is directly or indirectly connected to the lead screw, one side of the slide seat is in threaded connection with the lead screw, and the gun barrel is indirectly connected to the slide seat. Through adopting above-mentioned technical scheme, dabber hoist mechanism adopts first lifting unit, can promote the whole including a gun section of thick bamboo and dabber.

As a further improvement of the present invention, the present invention further includes a first connection seat, a first spring, a second insulation tube and a sensor assembly, wherein the second insulation tube is located between the shaft sleeve and the gun barrel, one end of the first spring is directly or indirectly connected to the first connection seat, the other end of the first spring is directly or indirectly connected to the second connection seat, a first metal member penetrates through the first connection seat and is movable relative to the first connection seat, and the first connection seat is fixedly connected to the gun barrel; the gun barrel is of a stepped barrel-shaped structure, the upper section is a large-size section, the lower section is a small-size section, a stepped part is arranged at the joint of the large-size section and the small-size section on the inner wall of the gun barrel, the stepped part is used for overlapping the flange end at the upper end of the second insulating tube, the upper end and the lower end of the gun barrel are all in an open shape, fourth through holes used for embedding screws and insulating barrels are formed in the opposite side walls of the small-size section of the gun barrel, the screws penetrate through the second insulating tube and are connected to the shaft sleeve, and the insulating barrel is sleeved outside the; the stiffness coefficient of the first spring is greater than the stiffness coefficient of the second spring. The gun barrel in the scheme can adopt metal parts, and the arrangement of the insulating parts can improve the insulating effect between the mandrel and the gun barrel, ensure that the mandrel and the gun barrel are not conductive, and facilitate the taking and welding of welding nails; the arrangement of the sensor assembly can improve the automation degree of the welding gun; the setting of first spring and second spring can play double cushioning effect, improves the stability of getting the nail and welding the nail process. Because of the second spring plays a role earlier, the second spring is softer, can play first round buffering effect, then first spring plays a role again, and first spring is harder, and the successive layer cushions, and when first spring produced the effect, the upper limit position that shows the dabber and remove can effectively slow down dabber rebound, can guarantee the reliable welding to the welding nail among the welding process, can effectively slow down impact degree again, guarantees welder assembly's life.

A stud welding gun comprises the gun body assembly of any one of the above aspects. Stud welding gun can be hand-held stud welding gun, also can be automatic stud welding gun, and when welding, the welding is convenient, and insulating effect is good, and buffering effect is good, and it is accurate and stable to reset.

Compared with the prior art, the utility model discloses the beneficial effect who possesses has at least: the setting of bearing, axle sleeve, existing removal that is favorable to the dabber for a gun section of thick bamboo, under the effect of bearing, axle sleeve, the dabber can be conveniently smoothly reciprocates for a gun section of thick bamboo, and under the effect of second spring, the dabber resets stably, also can play the cushioning effect to a certain extent, and dabber hoist mechanism can be used for the promotion of dabber, and whole rifle body subassembly compact structure is ingenious, and the facilitate promotion is used.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic structural view of a stud welding apparatus according to the present invention;

fig. 2 is a schematic view of a partial structure of a stud welding apparatus according to an embodiment of the present invention before the stud welding apparatus is removed;

FIG. 3 is a schematic view of the protective cover of FIG. 2 after being hidden;

FIG. 4 is an enlarged view of the part A of FIG. 3;

FIG. 5 is an enlarged view of the portion B of FIG. 3;

fig. 6 is a schematic view of a partial structure of a stud welding apparatus according to an embodiment of the present invention when a stud is removed;

FIG. 7 is a schematic structural view of the automatic stud welding gun of FIG. 6 during stud removal;

FIG. 8 is an enlarged view of the structure of the portion C in FIG. 7;

FIG. 9 is an enlarged view of the structure of the portion D in FIG. 7;

fig. 10 is a schematic structural view of the automatic stud welding gun according to an embodiment of the present invention after the stud is removed and before the stud is welded;

FIG. 11 is an enlarged view of the structure of the portion E in FIG. 10;

fig. 12 is a schematic diagram of an explosive structure of an automatic stud welding gun according to an embodiment of the present invention;

fig. 13 is a schematic view of an alternative angle of an explosion configuration of an automatic stud welding gun according to an embodiment of the present invention;

fig. 14 is a schematic diagram of another exploded view of an automatic stud welding gun according to an embodiment of the present invention;

fig. 15 is a schematic diagram of another exploded structure of an automatic stud welding gun according to an embodiment of the present invention;

fig. 16 is a schematic structural diagram of a gun body assembly of an automatic stud welding gun according to an embodiment of the present invention;

fig. 17 is an exploded view of a gun body assembly of an automatic stud welding gun according to an embodiment of the present invention;

fig. 18 is a schematic cross-sectional view of a gun body assembly of an automatic stud welding gun according to an embodiment of the present invention;

fig. 19 is a schematic structural view of a protective cover of an automatic stud welding gun according to an embodiment of the present invention;

FIG. 20 is an exploded view of the protective cover of FIG. 19;

FIG. 21 is an enlarged view of the structure of portion F in FIG. 20;

FIG. 22 is an enlarged view of the exploded structure of portion F of FIG. 20;

fig. 23 is a schematic view of an overall structure of a handheld stud welding gun according to another embodiment of the present invention;

fig. 24 is an exploded view of a handheld stud gun according to another embodiment of the present invention;

fig. 25 is a schematic view, partially in section, of a hand-held stud welding gun according to another embodiment of the present invention;

FIG. 26 is an enlarged view of part I of FIG. 25;

FIG. 27 is an enlarged view of section II of FIG. 25;

fig. 28 is a schematic cross-sectional view of a barrel of a handheld stud welding gun according to another embodiment of the present invention.

In the figure: gun head 1, first sensor 2, metal connecting piece 3, gun barrel 4, metal connecting frame 5, second sensor 6, third sensor 7, first sensing piece 8, first insulating tube 9, protective cover 10, first connecting seat 11, first spring 12, second connecting seat 13, shaft sleeve 14, second spring 15, mandrel 16, fourth sensor 17, fifth sensor 18, second insulating tube 19, clamping kit 20, first bracket 21, second bracket 22, connecting bracket 23, rack 24, guide rod 25, second motor 26, upper limit switch 27, protective cover 28, first motor 29, connecting plate 30, lead screw shell 31, lead screw cover 32, sliding seat 33, lower limit switch 34, first connecting frame 35, fourth spring 36, first through hole 41, screw 42, insulating barrel 43, step part 44, fourth through hole 45, channel 46, handle 47, cavity 48, connecting rod through hole 49, Coil bottom cover 51, coil body 52, coil box 53, second metal piece 54, fifth spring 55, second metal piece cover 56, button 57, third support 58, buffer 59, connecting rod 60, press plate 61, automatic stud welding gun 100, inner cover 101, outer cover 102, insulating ball 103, first mounting hole 104, second mounting hole 105, conductive thimble 106, buffer strip 130, first metal piece 131, second gasket 132, insulating base 133, guide rod two 134, third through hole 140, bearing 141, second through hole 142, first gasket 151, pin 161, fifth through hole 191, flange end 192, welding nail 200, porcelain ring 201, clamping block 202, connecting block 203, third spring 204, adapter cylinder 205, third induction piece 231, limiting piece 232, second induction piece 241, robot 300, welder 400, buffer through hole one 461, control cabinet 500, connecting piece 531, step 541, fastener two 581, step, fastener two, Bumper second 582, weldment 600, workbench 700, rocker station 800, first connecting section 2031, second connecting section 2032, third connecting section 2033 and fourth connecting section 2034.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following buckling drawings and preferred embodiments are described in detail below with reference to the following detailed description of the embodiments, structures, features and effects of the present invention.

In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the indicated orientations and positional relationships based on the orientation shown in the drawings for convenience in describing the application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and are not to be considered limiting of the application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

Referring to fig. 14 to 18, the lance body assembly includes a lance head 1, a first sensor 2, a metal connecting member 3, a lance barrel 4, a metal connecting frame 5, a second sensor 6, a third sensor 7, a first sensing member 8, a first insulating tube 9, a first connecting seat 11, a first spring 12, a second connecting seat 13, a shaft sleeve 14, a second spring 15, a mandrel 16, a fourth sensor 17, a fifth sensor 18 and a second insulating tube 19, the first sensor 2 is disposed inside the lance head 1, the upper end of the lance head 1 is connected to the metal connecting member 3, the first sensor 2 is connected to the metal connecting member 3, the upper end of the metal connecting member 3 is connected to the mandrel 16, the metal connecting frame 5 is connected to the metal connecting member 3, the first insulating tube 9, the second insulating tube 19 and the lance barrel 4 are sequentially sleeved on the lower portion of the mandrel 16 from inside to outside, the second spring 15 is sleeved on the outer wall of the mandrel 16 and is located in the first insulating tube 9, an inward protruding flange may be disposed in the first insulating tube 9, one end of the second spring 15 is connected to the flange in the first insulating tube 9, and the other end of the second spring 15 is directly or indirectly connected to the shaft sleeve 14 through a first gasket 151. The first insulating tube 9 is relatively fixedly connected with the mandrel 16 through a fastener, a bearing 141, a shaft sleeve 14, a second insulating tube 19 and the gun barrel 4 are sequentially sleeved on the periphery of the upper part of the mandrel 16 from inside to outside, a first connecting seat 11 is connected with the upper part of the gun barrel 4, a second connecting seat 13 is connected on the mandrel 16, one end of a first spring 12 is directly or indirectly connected with the first connecting seat 11, the other end of the first spring 12 is directly or indirectly connected with the second connecting seat 13, a first metal piece 131 can be directly or indirectly connected on the second connecting seat 13, the first metal piece 131 penetrates through the first connecting seat 11 and can move relative to the first connecting seat 11, the first metal piece 131 is matched with the first connecting seat 11 to play a guiding role, in other embodiments, the first metal piece 131 can be a guiding piece made of other materials, the first spring 12 can be sleeved on the outer wall of the first metal piece 131, the second connecting seat 13 is located above the second insulating tube 19, the first sensing part 8 is connected to the second connecting seat 13, a first through hole 41 for the first sensing part 8 to extend out is formed in the side wall of the gun barrel 4, the first through hole 41 is in an oblong shape, the second sensor 6, the third sensor 7, the fourth sensor 17 and the fifth sensor 18 are installed on the barrel wall of the gun barrel 4, the third sensor 7 and the fifth sensor 18 are respectively located on two sides of the first through hole 41 and used for sensing the first sensing part 8, the third sensor 7 is higher than the fifth sensor 18, the fourth sensor 17 is located on one side, close to the rack 24, of the gun barrel 4 and used for sensing the second sensing part 241 on the rack 24, and the second sensor 6 is located on one side, far away from the rack 24, of the gun barrel 4 and used for sensing the third sensing part 231 on the guide rod 25. The outer edge of the second connecting holder 13 is larger than the inner diameter of the sleeve 14. Adopt the setting of two springs, can make the rifle rest the subassembly when taking and welding the welding nail, second spring 15 plays earlier, then first spring 12 plays again, and the successive layer cushions, can promote the buffering effect of dabber, guarantees stable welding, alleviates the noise.

Wherein the first sensor 2, the second sensor 6, the third sensor 7, the first sensing member 8, the fourth sensor 17 and the fifth sensor 18 constitute a sensor assembly, which can improve the automation of the gun body assembly.

Referring to fig. 11 to 15, the gun head 1 is in a stepped tubular structure, the size of the lower portion of the gun head is larger than that of the upper portion of the gun head, and a plurality of vertical gaps are uniformly formed in the side wall of the gun head, so that the gun head is beneficial to deformation of the gun head to a certain extent when clamping a welding nail, and the welding nail can be reliably clamped by the inner wall of the gun head. The first sensor 2 may be used to sense whether a weld nail is present in the lance tip 1. The metal connector 3 may be a conductive member such as a copper nut or a shaft-shaped metal connector, and is used to connect the mandrel 16 and the gun head 1.

Referring to fig. 14 to 18, the gun barrel 4 is a stepped barrel structure, the upper section is a large-size section, the lower section is a small-size section, a stepped portion 44 is arranged at the joint of the large-size section and the small-size section, the stepped portion 44 is used for overlapping a flange end 192 at the upper end of the second insulating tube 19, the upper end and the lower end of the gun barrel 4 are both open, a fourth through hole 45 is formed in the opposite side wall of the small-size section of the gun barrel for embedding a screw 42 and an insulating tube 43, the screw 42 passes through a fifth through hole 191 in the second insulating tube 19 and is connected to the shaft sleeve 14, and the insulating tube 43 is arranged between the screw 42 and the gun barrel 4. The metal connecting frame 5 is L-shaped, the transverse part of the metal connecting frame 5 is connected between the copper nut of the metal connecting piece 3 and the connecting piece, and the upper end of the vertical part can be externally connected with a lead.

Referring to fig. 14 to 18, the second sensor 6 can sense the third sensor 231 on the guide rod 25, and if the third sensor is in a position that can be sensed by the second sensor 6, it indicates that the porcelain ring 201 touches the surface of the welding element, the third sensor 7 can sense the first sensor 8, and if the first sensor 8 is in a position that can be sensed by the third sensor 7, it indicates that the spindle 16 in the gun body assembly moves to a position that causes the first spring 12 to generate a force. The stiffness coefficient of the first spring 12 is larger than that of the second spring 15, and the elastic force generated by the first spring 12 is larger than that generated by the second spring 15 for the same length deformation. Referring to fig. 8, the fourth sensor 17 is used for sensing the second sensing element 241, and if the second sensing element 241 is located at a position that can be sensed by the fourth sensor 17, it indicates that the porcelain ring clamping assembly moves upward relative to the gun body assembly to a position before the welding nail is clamped, that is, it indicates that the clamping block 202 of the clamping sleeve 20 in the porcelain ring clamping assembly moves to a position that is pushed open by the gun head 1 in the gun body assembly. The fifth sensor 18 is configured to sense the first sensing element 8, and if the first sensing element 8 is located at a position that can be sensed by the fifth sensor 18, that is, the mandrel 16 moves upward to drive the first sensing element 8 to move to a position where the fifth sensor 18 reacts, that is, a position where the mandrel 16 is just jacked up indicates that the welding nail in the gun head 1 of the gun body assembly is located at a position just touching the surface of the welding element. Each sensing element can be a metal element.

Referring to fig. 17 and 18, the first connecting seat 11 is in a circular ring shape, the first connecting seat 11 is fixedly connected with the gun barrel 4, a through hole for the upper end of the first metal part 131 to penetrate through is formed in the middle of the first connecting seat 11, the second connecting seat 13 is in a cylindrical structure, a flange extending inwards is arranged at the bottom of the second connecting seat, an insulating seat 133 is installed in the second connecting seat 13, the insulating seat 133 is in a stepped cylindrical structure, the lower portion of the insulating seat 133 is a small-size section, the upper portion of the insulating seat 133 is a large-size section, the connecting position is in a step shape, the stepped connecting position is lapped at the flange in the second connecting seat 13, the small-size section extends out of the second connecting seat 13, the insulating seat 133 is sleeved on the periphery of the upper end of the mandrel 16, namely, the insulating seat. A second spacer 132 is further disposed in the insulating base 133, the second spacer 132 is made of an insulating material, and the second spacer 132 is located on the top surface of the mandrel 16 and located between the mandrel 16 and the first metal part 131. The first metal piece 131 is stepped shaft-shaped and has a large-size portion and a small-size portion, the large-size portion is located in the second connecting seat 13, the first metal piece 131 and the second connecting seat 13 can be fastened and connected through a fastener, the first spring 12 is sleeved on the first metal piece, one end of the first spring acts on the first connecting seat 11, and the other end of the first spring acts on the large-size portion of the first metal piece 131 or the second connecting seat 13.

As shown in fig. 17 and 18, the outer wall of the mandrel 16 is provided with a pin 161, the upper end of the mandrel 16 is provided with a flange, the flange at the upper end of the mandrel 16 is lapped at a step-shaped joint inside the insulating base 133, the side wall of the bearing 141 is provided with a second through hole 142 for the pin 161 to move up and down, the side wall of the shaft sleeve 14 is provided with a third through hole 140 for the pin 161 to move up and down, the second through hole is aligned with the third through hole, the end of the pin 161 extends into the second through hole and the third through hole, the second through hole 142 and the third through hole 140 are both strip-shaped through holes, only the pin 161 can move up and down, and the mandrel and the bearing cannot rotate relatively, that is, the mandrel 16 is only capable of moving up and down relative to the. The bearing 141 may be a bushing, a flat bearing, or the like. The pin 161 is matched with the second through hole and the third through hole, so that the limiting function can be achieved, and the mandrel 16 can be prevented from being separated from the gun barrel 4.

As shown in fig. 17, the upper end of the second insulating tube 19 is a flange end 192, and the second insulating tube is provided with a fifth through hole 191 into which the insulating cylinder 43 is inserted.

Referring to fig. 1 to 6, the automatic stud welding apparatus includes an automatic stud welding gun 100, a robot 300, a welder 400, and a control cabinet 500, the automatic stud welding gun 100 is mounted on a manipulator of the robot 300, the manipulator is a multi-degree-of-freedom manipulator, the control cabinet 500 is electrically connected to the welder 400 and the automatic stud welding gun 100, and the robot 300 is electrically connected to an electric cabinet and the control cabinet 500 of the robot. The automatic stud welding gun 100 takes the welding nail 200 and the porcelain ring 201 on the placing table 800, sends the welding nail to the position above the weldment 600 of the workbench 700 through the manipulator, and welds the welding nail 200 on the weldment 600 through the automatic stud welding gun 100 (the welding process is described in detail later).

Referring to fig. 1 to 22, the stud welding gun is an automatic stud welding gun 100 including: a welding gun assembly, a porcelain ring clamping assembly, a first lifting assembly and a second lifting assembly, wherein the first lifting assembly comprises a first motor 29, a lead screw and a slide seat 33, an output shaft of the first motor 29 is directly or indirectly connected to the lead screw, in the embodiment, referring to fig. 14 and fig. 15, the output shaft of the first motor 29 is connected to the lead screw through a belt pulley and a synchronous belt, a protective cover 28 can be covered on the belt pulley and the synchronous belt, the lead screw is installed in a lead screw shell 31 (not shown in the figure), the lead screw shell 31 is a cuboid shell with an opening at one side, the opening side is connected with a lead screw cover body 32, a gap for extending the slide seat is left between the lead screw shell 31 and the lead screw cover body 32, the first motor 29 and the lead screw shell 31 are positioned at the same side of the synchronous belt, a connecting plate 30 for connecting a manipulator is installed at the side of the lead screw, the other side of the slide seat 33 extends out of a gap between the screw shell 31 and the screw cover 32 to be directly connected or indirectly connected with a first connecting frame 35 of a welding gun assembly through a connecting plate, the porcelain ring clamping assembly is movably connected onto the welding gun assembly, the second lifting assembly is connected with the welding gun assembly and the porcelain ring clamping assembly and used for driving the porcelain ring clamping assembly to move relative to the welding gun assembly, and the welding gun assembly is located on a moving path of the porcelain ring clamping assembly and can enable the porcelain ring clamping assembly to be opened.

The first lifting assembly is a mandrel lifting mechanism, the gun barrel 4 is indirectly connected to the sliding seat 33, and the lifting of the sliding seat 33 can drive the lifting of the gun barrel 4, and thus can also drive the lifting of the mandrel 16. In this embodiment, the barrel 4 may be a metal part.

Referring to fig. 12, 14 and 15, a plurality of limit switches, such as an upper limit switch 27 and a lower limit switch 34, may be disposed on the lead screw housing 31, and an origin switch may be disposed between the upper limit switch 27 and the lower limit switch. The slide 33 or the first connecting frame 35 may be provided with a sensing member for triggering each limit switch, the upper limit switch 27 is used for limiting the upper limit position of the slide 33 relative to the lead screw, the lower limit switch 34 is used for limiting the lower limit position of the slide 33 relative to the lead screw, and the origin position switch is used for limiting the initial position of the slide relative to the lead screw.

Referring to fig. 7 to 15, the welding gun assembly includes a first connecting frame 35, a second connecting frame 22 and a gun body assembly, wherein the first connecting frame 35 is directly or indirectly connected to the sliding base 33, the second connecting frame 22 is connected to the first connecting frame 35 through a fastener, the gun body assembly is connected to the second connecting frame 22, and the second connecting frame 22 is movably arranged on the guide rod 25 in the porcelain ring clamping assembly. The number of the second brackets 22 is two.

Referring to fig. 12 to 15, the outer edge of the first connecting frame 35 is substantially rectangular, and has a rectangular frame structure, a horizontal rib is provided in the rectangular frame, the two vertical side beams of the rectangular frame are connected with the connecting bar, and the first connecting frame 35 can be mounted on the sliding base 33 through a fastener and the connecting bar. The second support 22 includes a large ring body and two small ring bodies, the large ring body and the two small ring bodies are respectively located at three vertex positions of a triangle, the large ring body is connected with the small ring bodies through a rib plate, the two small ring bodies are connected through another rib plate, the rib plate between the two small ring bodies is connected on the first connecting frame 35 through a fastener, the gun barrel 4 of the gun body assembly is fixedly arranged in the annular structure of the large ring body in a penetrating manner, the guide rod 25 is arranged in the annular structure of the small ring body in a penetrating manner, and of course, a bearing or a shaft sleeve and the like which are beneficial to the movement of the guide rod 25 can be arranged in the small ring body.

Referring to fig. 5 and 7, the automatic porcelain ring clamping device comprises a porcelain ring clamping assembly and a second lifting assembly, the porcelain ring clamping assembly is movably connected to a welding gun assembly of the automatic stud welding gun, the second lifting assembly is connected to the welding gun assembly and the porcelain ring clamping assembly and used for driving the porcelain ring clamping assembly to move relative to the welding gun assembly, and the welding gun assembly is located on a moving path of the porcelain ring clamping assembly and can enable the porcelain ring clamping assembly to be opened.

Referring to fig. 5, 7, 12 and 13, the porcelain ring clamping assembly includes a guide rod 25, a first bracket 21 and a clamping assembly 20, the second lifting assembly includes a second motor 26 and a transmission assembly, the first bracket 21 is connected to a lower portion of the guide rod 25, the clamping assembly 20 is connected to the first bracket 21, the second motor 26 is mounted on a second bracket 22 at an upper portion of the welding gun assembly, an output shaft of the second motor 26 is connected to the transmission assembly, and the transmission assembly is connected to the guide rod 25. The number of the guide rods 25 is two, and the two guide rods 25 are arranged in parallel. The two guide rods 25 are connected through a connecting bracket 23, a third sensing part 231 and a limiting part 232 are mounted on the connecting bracket 23, the connecting bracket 23 can be adjusted up and down relative to the guide rods 25, and the limiting part 232 is located on a moving path of the welding gun assembly and can block the movement of the welding gun assembly. The stop 232 may be a fastener that on the one hand can adjust the position of the connecting bracket 23 relative to the guide rod 25 and on the other hand can be used to abut against the second bracket 22 in the lower position, thereby limiting the limit distance of downward movement of the guide rod 25 relative to the gun body assembly. The first support 21 comprises a large ring body and two small ring bodies, the large ring body and the two small ring bodies are respectively approximately positioned at three vertex positions of a triangle, the large ring body is connected with the small ring bodies through rib plates, the gun head 1 of the gun body assembly is movably arranged in the annular structure of the large ring body in a penetrating mode, and the guide rod 25 is fixedly arranged in the annular structure of the small ring body in a penetrating mode.

Referring to fig. 7 and 8, the driving assembly includes a gear and a rack 24, the gear is connected to an output shaft of the second motor 26, the rack 24 is mounted on the guide rod 25, a length direction of the rack 24 is parallel to a length direction of the guide rod 25, and the gear is engaged with the rack 24.

Referring to fig. 5, 7 and 9, the clamping kit 20 includes a clamping block 202, two connecting blocks 203, two third springs 204 and an adapter tube 205, the adapter tube 205 is connected to the first bracket 21, the two clamping blocks 202, the two connecting blocks 203 and the two third springs 204 are symmetrically hinged to the adapter tube 205, and the upper portion of the gun head 1 of the gun body is inserted into the adapter tube 205; the connecting block 203 includes the first linkage segment 2031 that top-down connects, second linkage segment 2032 and third linkage segment 2033, first linkage segment 2031 articulates on adapter 205, the grip block 202 is connected to the outside of third linkage segment 2033, be connected with fourth linkage segment 2034 on the first linkage segment 2031, the fourth linkage segment 2034 of a connecting block is connected to the one end of third spring 204, the fourth linkage segment 2034 of another connecting block is connected to the other end of third spring 204, the lower extreme of the second linkage segment 2032 on two connecting blocks is the slope form setting to the one side that is close to rifle head 1 place.

The guide rod 25 is sleeved with a fourth spring 36, the upper end of the fourth spring 36 is directly or indirectly connected with the second bracket 22, and the lower end of the fourth spring 36 is directly or indirectly connected with the first bracket 21.

Referring to fig. 14, 15, 19 to 22, an anti-collision protection device is applied to an automatic stud welding gun and plays an anti-collision protection role for the automatic stud welding gun, and includes a protection cover 10, where the protection cover 10 includes an inner cover 101 and an outer cover 102, both the inner cover 101 and the outer cover 102 are made of conductive materials, a gap is left between the inner cover 101 and the outer cover 102, the inner cover 101 is connected to a protection circuit through a wire, the outer cover 102 is connected to the protection circuit through a wire, and the outer cover 102 may deform and be directly or indirectly conducted with the inner cover when being collided, so as to conduct the protection circuit. The protective cover 10 may be made of metal.

The protective cover 10 can structurally protect a gun body assembly in an automatic stud welding gun, and can start a machine to be stopped to protect the whole welding gun and prompt and protect an external user after the inner cover body 101 is communicated with the outer cover body 102 after the protective cover is deformed due to collision. Of course, the protection circuit is not limited to the emergency stop protection circuit, and may be an alarm protection circuit or the like.

Referring to fig. 21 and 22, a plurality of conductive pins 106 are disposed between the inner cover 101 and the outer cover 102; the conductive pins 106 may be uniformly distributed on the surface of the inner cover 101 or the outer cover, one end of the conductive pin 106 is connected to the inner cover 101, and a gap is left between the other end of the conductive pin 106 and the outer cover 102, or one end of the conductive pin 106 is connected to the outer cover 102 and a gap is left between the other end of the conductive pin 106 and the inner cover 101. The end of the conductive thimble 106 that has a gap with the corresponding cover body is frustum-shaped, and of course, the end of the conductive thimble may have other shapes.

Referring to fig. 20, 21 and 22, a deformable insulating ball 103 is wrapped around each conductive thimble 106, a through hole for accommodating the conductive thimble 106 is formed in the insulating ball 103, one end of the conductive thimble protrudes out of the surface of the insulating ball 103 to connect with the inner cover or the outer cover, the other end of the conductive thimble does not protrude out of the surface of the insulating ball 103, the outer cover 102 deforms to press the insulating ball 103 when being collided, and the other end of the conductive thimble protrudes out of the surface of the insulating ball to connect the inner cover 101 and the outer cover 102. The insulating ball 103 is deformable after being applied with force and can be restored to an original shape after the external force is removed.

As shown in fig. 19 and 20, the inner shell 101 and the outer shell 102 are U-shaped in cross section. The upper and lower ends of the inner cover 101 and the outer cover 102 are open.

Inner cover 101 and outer cover 102 are connected by fasteners (not shown) made of insulating material. The fastener of insulating material sets up in the marginal position of the inner cover body and the outer cover body. Specifically, as shown in fig. 20, first mounting holes 104 may be formed in two side edges of the inner cover 101, second mounting holes 105 corresponding to the first mounting holes may be formed in two side edges of the outer cover 102, and the first mounting holes 104 and the corresponding second mounting holes 105 may be connected by fasteners made of non-metallic materials, and connected to the connecting strips of the beams on two sides of the first connecting frame 35 of the automatic stud welding gun by the fasteners.

The thickness of inner shell 101 is thicker than the thickness of outer shell 102. The outer cover body is thinner and is easier to deform, thereby being beneficial to realizing conduction with the inner cover body and realizing the protection function.

The outer side of the outer shell 102 facing away from the inner shell is coated with a layer of protective material. The protective material can be paint and the like, can be insulating protective material, and can play a role in protection and beauty.

When the automatic stud welding gun is used, the welding nails 200 are placed on the workpiece placing table 800, the porcelain rings 201 are sleeved on the welding nails 200, the porcelain rings 201 are positioned at the head positions close to the welding nails 200, and the automatic stud welding gun is roughly divided into the following steps:

(1) as shown in fig. 1 to 5, before the automatic stud welding gun 100 is used to load and unload the welding nails, the second motor 26 drives the gear to rotate, drives the rack 24 to move upwards, drives the guide rod 25 to move upwards, thereby driving the first bracket 21 and the clamping sleeve 20 to move upwards, and when the inclined second connecting section 2032 of the connecting block 203 contacts the lance tip 1 in the process of moving the clamping sleeve 20 upwards, because the first connecting section 2031 is hinged with the adapter tube 205, the lance head 1 pushes the second connecting section 2032 open, so the connecting blocks 203 swing outwards around the hinged point, the two connecting blocks 203 are in an open state, the two clamping blocks 202 are in an open state, when the second sensing member 241 on the rack 24 moves to a position that can be sensed by the fourth sensor 17, the second motor 26 stops operating, the two clamping blocks 202 are in an open state, and the bottom surfaces of the two clamping blocks 202 are higher than the bottom surface of the gun head 1, so that subsequent welding nail assembling and disassembling can be conveniently carried out;

(2) when a welding nail is taken, the first motor 29 drives the screw rod to rotate, the sliding seat 33 is driven to move downwards, the gun body assembly is driven to move towards the position close to the welding nail 200 on the swing piece table 800, the gun head 1 is sleeved on the welding nail 200, when the first sensor 2 in the gun head 1 senses the welding nail 200, the second motor 26 loses braking, under the action of the fourth spring 36, the first support 21 moves downwards, the clamping block 202 moves downwards (as shown in fig. 5), the first motor 29 rotates reversely, the sliding seat 33 is driven to move upwards, the gun body assembly is driven to move upwards, namely, the gun head 1 drives the clamped welding nail 200 to move upwards, the first support 21 moves downwards, the clamping block 202 clamps the ceramic ring 201 to move downwards, the head of the welding nail 200 is separated from the ceramic ring 201 (as shown in fig. 6, 7 and 9), when the fourth spring welding nail 200 is pulled upwards to a certain position, the limiting piece 232 abuts against the second support 22 at the lower part, the guide rod can not move downwards any more, the relative distance between the welding nail 200 and the ceramic ring 201 is not enlarged any more, at this time, the bottom surface of the ceramic ring 201 is lower than or flush with the bottom surface of the welding nail 200 (as shown in fig. 10 and 11), the slide seat 33 returns to the initial position, namely the position of the original position switch under the driving of the first motor 29 and the lead screw, and the step of assembling and disassembling the welding nail and the ceramic ring is completed;

(3) when welding a welding nail, the labels of the components can refer to fig. 1, fig. 2, fig. 6, fig. 10, fig. 11, fig. 12, fig. 13, fig. 16, etc., the robot 300 drives the automatic stud welding gun 100 to move above the weldment 600 by a manipulator, the first motor 29 drives the lead screw to rotate, the slide seat 33 is driven to move downwards, the welding nail 200 and the porcelain ring 201 on the welding gun assembly are driven to move towards the direction close to the weldment 600, when the porcelain ring 201 hits the surface of the weldment 600, the second sensor 6 senses the third sensor 231, the mandrel 16 is driven by the lead screw to move continuously, when the welding nail 200 hits the surface of the weldment 600, the fifth sensor 18 senses the first sensor 8, only when the first sensor 2, the second sensor 6 and the fifth sensor 18 sense corresponding components, the first motor 29 starts to rotate reversely, the slide seat 33 is driven to move upwards, so as to drive the mandrel 16 to move upwards, the welding nail 200 is further driven to move upwards, so that a certain distance is formed between the bottom surface of the welding nail 200 and the surface of the weldment 600, arc ignition and combustion are facilitated, a molten pool is formed on the weldment after a preset time, the welding nail can also form a melting zone, the first motor 29 rotates forwards to drive the sliding seat 33 to move downwards, so that the mandrel 16 is driven to move downwards, the welding nail 200 is further driven to move downwards, the welding nail 200 is implanted into the molten pool, the welding nail is welded on the weldment, and in the welding process, the ceramic ring can resist high temperature, so that electric arcs can be focused on the surface of a workpiece, the electric arcs are stabilized, and heat loss is reduced;

(4) after welding, the first motor 29 rotates reversely to drive the sliding seat 33 to move upwards so as to drive the mandrel 16 to move upwards, the gun head 1 is separated from the welding nail 200, the clamping block 202 is separated from the ceramic ring and the welding nail, and the sliding seat 33 moves to the initial position.

And (5) repeating the steps (1) to (4) to repeatedly finish the processes of nail taking and welding of the welding nail. The pendulum platform 800 can be sized as desired to accommodate a greater or more appropriate number of weld nails. Of course, a feeding mechanism of an automatic welding gun such as an automatic nail arranging device (for example, a feeding mechanism suitable for an automatic welding gun disclosed in patent CN 109014517A) may be used to automatically arrange and feed the bulk material of welding nails, and the welding gun is at a fixed position when taking out nails, thereby improving the efficiency.

Example 2

Referring to fig. 23 to 28, a lance assembly includes a lance head 1, a metal connecting member 3, a lance barrel 4, a first insulating tube 9, and a second connecting seat 13, the gun head comprises a shaft sleeve 14, a second spring 15, a mandrel 16 and a mandrel lifting mechanism, wherein the upper end of the gun head 1 is connected with a metal connecting piece 3, the upper end of the metal connecting piece 3 is connected with the mandrel 16, a first insulating tube 9 is sleeved on the periphery of the lower part of the mandrel 16, the second spring 15 is sleeved on the outer wall of the mandrel 16 and is positioned in the first insulating tube 9, the first insulating tube 9 is fixedly connected with the mandrel 16 through a fastener, one end of the second spring 15 is connected with the first insulating tube 9, the other end of the second spring 15 is directly or indirectly connected with the shaft sleeve 14, a bearing 141, the shaft sleeve 14 and a gun barrel 4 are sequentially sleeved on the periphery of the upper part of the mandrel 16 from inside to outside, the upper end of the mandrel 16 is directly or indirectly connected with a second connecting seat 13. The structure of the lance tip 1 is the same as in example 1 and will not be described in detail. In this embodiment, the barrel 4 may be a non-metallic component. The barrel 4 and the sleeve 14 may be fixedly connected relative to each other.

As shown in fig. 24 and 27, the second connection seat 13 is a tubular structure, a flange extending inward is disposed at the bottom of the second connection seat 13, an insulation seat 133 is installed in the second connection seat 13, the insulation seat 133 is a stepped tubular structure, the lower portion of the insulation seat 133 is a small-size section, the upper portion of the insulation seat 133 is a large-size section, the connection portion is stepped, the stepped connection portion is lapped at the flange in the second connection seat 13, the small-size section of the insulation seat 133 extends out of the second connection seat 13, the insulation seat 133 is sleeved on the periphery of the upper end of the mandrel 16, the upper end of the mandrel 16 is provided with a flange, and the flange at the upper end of the mandrel 16 is lapped on. The spindle 16 is sleeved with a first gasket 151 made of an insulating material, and the first gasket 151 is located between the second spring 15 and the shaft sleeve 14.

A second spacer 132 is further disposed in the insulating base 133, the second spacer 132 is made of an insulating material, and the second spacer 132 is located on the top surface of the mandrel 16 and located between the mandrel 16 and the first metal part 131.

As shown in fig. 24 and 27, the outer wall of the second connecting seat 13 is provided with a buffer bar 130, the barrel 4 is provided with a passage 46 for the buffer bar 130 to move, as shown in fig. 28, the barrel 4 is provided with a first through hole 461 of the buffer 59, as shown in fig. 28, the buffer 59 is further provided in the first through hole 461 of the buffer 4, and the buffer bar 130 is located above the buffer 59. The buffer 59 is a hydraulic buffer, buffer solution and a buffer spring are arranged in the buffer 59, the buffer comprises a buffer head 591 which is movably arranged, the buffer strip 130 can contact the buffer head 591 in the moving process, the buffer head 591 can buffer the buffer strip, the mandrel is enabled to return stably, the descending speed of the gun head 1 of the welding gun is enabled to be buffered, and therefore the welding nail in the gun head descends stably, the welding nail cannot splash molten iron in a molten pool, and the welding nail is enabled to be solid and attractive.

As shown in fig. 24, 25 and 27, the outer wall of the mandrel 16 is provided with a pin 161, the side wall of the bearing 141 is provided with a second through hole 142 for the pin 161 to move up and down, the side wall of the shaft sleeve 14 is provided with a third through hole 140 for the pin 161 to move up and down, the second through hole is aligned with the third through hole, the tail end of the pin 161 extends into the second through hole and the third through hole, the second through hole 142 and the third through hole 140 are both strip-shaped through holes, only the pin 161 can move up and down, and the mandrel and the bearing cannot rotate relatively. The outer wall of the third through hole 140 is covered with a strip-shaped covering sheet 143 to cover the third through hole.

As shown in fig. 24, 25 and 26, the mandrel lifting mechanism includes an electromagnet assembly, the electromagnet assembly includes a coil bottom cover 51, a coil body 52, a coil box 53 and a second metal member 54, an upper side wall of the coil box 53 is provided with a connecting piece 531 protruding outward, the connecting piece 531 is installed at an upper portion of an inner cavity of the gun barrel 4 above the passage 46, the coil body 52 is located in the coil box 53, an outer wall of the coil body 52 is wound with a coil, the coil bottom cover 51 is connected to a bottom portion of an inner wall of the coil box, the coil bottom cover is located below the coil body 52, the second metal member 54 is connected to the coil body 52, a lower portion of the second metal member 54 is located in the coil body 52, the second metal member 54 is an iron core located at an upper position, the first metal member 131 is an iron core located at a lower position, an upper portion of the first metal member 131 is located in the coil body 52, a gap is provided, the upper end of the first metal piece 131 is connected with a second guide rod 134, the upper part of the second guide rod 134 penetrates through the second metal piece 54, and the first metal piece 131, the second guide rod 134 and the second metal piece 54 are coaxially arranged. The second metal part 54 is hollow, the inner wall of the second metal part 54 has an inwardly protruding step 541, and the step 541 is provided with a through hole for the second guide rod 134 to penetrate through.

As shown in fig. 24 and 28, the gun barrel 4 is a stepped barrel shape, the upper and lower ends of the gun barrel 4 are open, the inner wall of the upper part of the gun barrel 4 is provided with a cavity 48 for accommodating the electromagnet assembly, and the cavity 48 is communicated with the channel 46. The relative lateral wall of the small-size section of the lower part of a gun section of thick bamboo all has seted up fourth through-hole 45 to supply the screw embedding, the screw passes fourth through-hole 45 and is connected in axle sleeve 14 lower part lateral wall, and a gun section of thick bamboo 4 can adopt insulating material to make.

A second metal cover 56 is arranged above the gun barrel 4, the second metal cover 56 is connected to the coil box 53, a fifth spring 55 is sleeved on the periphery of the second metal 54, one end of the fifth spring 55 is connected to the second metal 54, and the other end of the fifth spring is connected to the coil box 53. The fifth spring 55 prevents the second metal member 54 from being loosened when the second metal member 54 is screw-coupled to the coil box 53.

As shown in fig. 23 to 28, the stud welding gun in the present embodiment is a handheld stud welding gun, and includes the gun body assembly described in the above embodiment, a connecting rod 60 and a pressing plate 61, a handle 47 is provided on the gun barrel 4, a button 57 is provided on the handle 47, and the button 57 is connected to a switch, so that the stud welding gun can be started to perform welding. The metal connector 3 is connected with a lead wire 62. The gun barrel 4 is provided with a third support 58, the third support 58 comprises a large ring body and a connecting block positioned on one side of the large ring body, the connecting block is of a plate-shaped structure, two through holes for the connecting rod 60 to penetrate are formed in the connecting block, and after the connecting rod 60 penetrates into the through holes, a second fastener 581 is screwed on the connecting block and can transversely stretch into the through holes, so that the connecting rod 60 can be locked through the second fastener 581. On the connecting block, between two through-holes, offer the second through-hole 582 of buffer that is used for the installation of buffer 59, the second through-hole of buffer can be the internal thread hole, and the cylinder body of buffer 59 accessible screw thread or fastener fastening connection are in second through-hole 582 of buffer. The pressing plate 61 is provided with an arc-shaped notch matched with the ceramic ring, so that the ceramic ring can be positioned. The barrel 4 is provided with a link through hole 49 through which the link 60 is inserted, on a side close to the grip 47.

When the welding gun is used, an operator inserts a welding nail into the gun head 1, places a porcelain ring on a workpiece to be welded, holds the handle 47 of the stud welding gun by hand, aligns the welding nail in the gun head 1 with the porcelain ring, simultaneously, the arc-shaped notch on the pressing plate 61 can position the porcelain ring, presses the button 57 to start the switch, the coil in the electromagnet assembly is electrified, the first metal piece 131 and the second metal piece 54 generate magnetism to attract each other, because the position of the second metal piece 54 is relatively fixed, the first metal piece 131 moves upwards, the first metal piece 131 drives the mandrel 16 to move upwards through the second connecting seat 13, the second spring 15 is compressed to store certain elastic potential energy, so that the gun head 1 and the welding nail in the gun head 1 are driven to move upwards, a certain distance is formed between the bottom surface of the welding nail and the surface of the welding piece, arc striking combustion is facilitated, a molten pool is formed on the welding piece after a certain time, and the welding nail can also form a melting zone, at this moment, the coil is powered off, the first metal piece and the second metal piece lose magnetism, the mandrel 16 moves downwards under the action of the second spring 15 (the descending speed of the mandrel is buffered by the buffer 59 to slow down the descending speed), and then the gun head drives the welding nail to move downwards to implant the welding nail into the molten pool, the speed of the welding nail is buffered, molten iron which cannot be melted splashes away, the welding nail is welded on the welding piece, the welding seam is firm and attractive, in the welding process, the ceramic ring can resist high temperature, the electric arc can be focused on the surface of a workpiece, the electric arc is stabilized, and the heat loss is reduced.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed by the preferred embodiment, it is not limited to the present invention, and any person skilled in the art can make modifications or changes equivalent to the above embodiments without departing from the scope of the present invention, but all the modifications, changes and modifications of the above embodiments that do not depart from the technical scope of the present invention are within the scope of the present invention.

Claims

1. The gun body assembly is characterized by comprising a gun head (1), a metal connecting piece (3), a gun barrel (4), a first insulating tube (9), a second connecting seat (13), a shaft sleeve (14), a second spring (15), a mandrel (16) and a mandrel lifting mechanism, wherein the metal connecting piece (3) is connected to the upper end of the gun head (1), the mandrel (16) is connected to the upper end of the metal connecting piece (3), the first insulating tube (9) is sleeved on the periphery of the lower portion of the mandrel (16), the second spring (15) is sleeved on the outer wall of the mandrel (16) and is located in the first insulating tube (9), the first insulating tube (9) is fixedly connected with the mandrel (16) through a fastener, one end of the second spring (15) is connected to the first insulating tube (9), the other end of the second spring (15) is directly or indirectly connected to the shaft sleeve (14), and a bearing (141) and a bearing (a mandrel (16) are sequentially sleeved on the periphery of the, The upper end of the mandrel (16) is directly or indirectly connected with a second connecting seat (13), and a first metal piece (131) is directly or indirectly connected on the second connecting seat (13).

2. The gun body assembly according to claim 1, wherein the second connecting seat (13) is of a cylindrical structure, an inwardly extending flange is arranged at the bottom of the second connecting seat (13), an insulating seat (133) is installed in the second connecting seat (13), the insulating seat (133) is of a stepped cylindrical structure, the lower part of the insulating seat (133) is a small-size section, the upper part of the insulating seat is a large-size section, the connecting part is stepped, the stepped connecting part is lapped at the flange in the second connecting seat (13), the small-size section of the insulating seat (133) extends out of the second connecting seat (13), the insulating seat (133) is sleeved on the periphery of the upper end of the mandrel (16), the upper end of the mandrel (16) is provided with a flange, and the flange at the upper end of the mandrel (16) is lapped on the insulating seat (133).

3. The gun body assembly according to claim 2, wherein a second gasket (132) is further disposed in the insulating base (133), the second gasket (132) is made of an insulating material, and the second gasket (132) is disposed on the top surface of the mandrel (16) and located between the mandrel (16) and the first metal member (131).

4. The gun body assembly according to claim 2 or 3, wherein the outer wall of the second connecting seat (13) is provided with a buffer strip (130), the gun barrel (4) is provided with a channel (46) for the buffer strip (130) to move, a buffer (59) is further arranged below the channel (46) on the gun barrel (4), and the buffer strip (130) is arranged above the buffer (59).

5. The gun body assembly according to claim 1, wherein the outer wall of the mandrel (16) is provided with a pin shaft (161), the side wall of the bearing (141) is provided with a second through hole (142) for the pin shaft (161) to move up and down, the side wall of the shaft sleeve (14) is provided with a third through hole (140) for the pin shaft (161) to move up and down, the second through hole is aligned with the third through hole, the tail end of the pin shaft (161) extends into the second through hole and the third through hole, the second through hole (142) and the third through hole (140) are both strip-shaped through holes, and only the pin shaft (161) can move up and down, but the mandrel and the bearing cannot rotate relatively.

6. The gun body assembly according to claim 1, wherein the mandrel lifting mechanism comprises an electromagnet assembly, the electromagnet assembly comprises a coil bottom cover (51), a coil body (52), a coil box (53), and a second metal member (54), the coil box (53) is installed on the upper portion of the inner cavity of the gun barrel (4), the coil body (52) is arranged in the coil box (53), the outer wall of the coil body (52) is wound with the coil, the coil bottom cover (51) is connected to the bottom of the inner wall of the coil box, the coil bottom cover is arranged below the coil body (52), the second metal member (54) is connected to the coil body (52), the lower portion of the second metal member (54) is arranged in the coil body (52), the upper portion of the first metal member (131) is arranged in the coil body (52), and a gap is formed between the upper end face of the first metal member (131) and the lower end face of the second metal member, the upper end of the first metal piece (131) is connected with a second guide rod (134), the upper portion of the second guide rod (134) penetrates through the second metal piece (54), and the first metal piece (131), the second guide rod (134) and the second metal piece (54) are coaxially arranged.

7. The gun body assembly according to claim 6, characterized in that a second metal cover (56) is arranged above the gun barrel (4), the second metal cover (56) is connected to the coil box (53), a fifth spring (55) is sleeved on the periphery of the second metal (54), one end of the fifth spring (55) is connected to the second metal (54), and the other end of the fifth spring is connected to the coil box (53).

8. The gun body assembly according to claim 1, characterized in that the spindle lifting mechanism comprises a first lifting assembly, the first lifting assembly comprising a first motor (29), a lead screw and a slide (33), an output shaft of the first motor (29) being directly or indirectly connected to the lead screw, one side of the slide (33) being threadedly connected to the lead screw, the gun barrel (4) being indirectly connected to the slide (33).

9. The gun body assembly according to claim 8, further comprising a first connecting seat (11), a first spring (12), a second insulating tube (19) and a sensor assembly, wherein the second insulating tube (19) is located between the shaft sleeve (14) and the gun barrel (4), one end of the first spring (12) is directly or indirectly connected to the first connecting seat (11), the other end of the first spring (12) is directly or indirectly connected to the second connecting seat (13), a first metal member (131) penetrates through the first connecting seat (11) and can move relative to the first connecting seat (11), and the first connecting seat (11) is fixedly connected with the gun barrel (4); the gun barrel (4) is of a step type barrel-shaped structure, the upper section is a large-size section, the lower section is a small-size section, the inner wall of the gun barrel is provided with a step part (44) at the joint of the large-size section and the small-size section, the step part (44) is used for overlapping a flange end (192) at the upper end of the second insulating tube (19), the upper end and the lower end of the gun barrel (4) are both open, fourth through holes (45) used for embedding screws (42) and insulating tubes (43) are formed in the opposite side walls of the small-size section of the gun barrel, the screws (42) penetrate through the second insulating tube (19) and are connected to the shaft sleeve (14), and the insulating tubes (43) are sleeved outside the screws (42); the stiffness coefficient of the first spring (12) is greater than the stiffness coefficient of the second spring (15).

10. A stud welding gun comprising the gun body assembly according to any one of claims 1 to 9.