CN112475698A

CN112475698A - Welding device for producing MOSFET device

Info

Publication number: CN112475698A
Application number: CN202011093872.9A
Authority: CN
Inventors: 许会芳; 王娜; 孙雯
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-03-12
Anticipated expiration: 2040-10-14
Also published as: CN112475698B

Abstract

The invention belongs to the technical field of MOSFET (metal oxide semiconductor field effect transistor) device production, and particularly relates to a welding device for MOSFET device production. The invention realizes the wire feeding, melting and welding operation of the welding wire in the welding process in the production process of the MOSFET device, can adjust the welding conveying capacity according to the requirement, can realize the operation of stopping along with welding, improves the welding efficiency and quality of the MOSFET device, meets the welding requirement of different positions of the MOSFET device, and reduces the labor intensity of operators.

Description

Welding device for producing MOSFET device

Technical Field

The invention relates to the technical field of MOSFET device production, in particular to a welding device for MOSFET device production.

Background

A metal-oxide semiconductor field effect transistor, referred to as a mosfet for short, is a field effect transistor that can be widely used in analog circuits and digital circuits. MOSFETs are classified into two types, N-type and P-type, according to their "channel" (working carrier) polarities, and are also commonly referred to as NMOSFET and PMOSFET, and other types include NMOS, PMOS, etc. for short,

the welding operation is needed in the production process of the MOSFET device, the existing welding equipment is inconvenient to weld, inconvenient for welding wire conveying and inconvenient for welding control, and therefore a welding device for producing the MOSFET device is needed.

Disclosure of Invention

The invention provides a welding device for producing a MOSFET device, which solves the problems in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a welding device for MOSFET device production comprises a welding gun main body, wherein a heating assembly is arranged inside the welding gun main body, a rotating assembly is arranged at the top of the heating assembly, the bottom of the heating assembly is connected with a material pushing assembly sleeved with the welding gun main body, an installation mechanism is fixedly connected to one side of the top of the welding gun main body, and a wire feeding assembly connected with the rotating assembly is arranged on the other side of the top of the welding gun main body;

the heating assembly comprises a heat conduction sleeve arranged inside a welding gun main body, a movable plate sliding along the length direction of the welding gun main body is movably sleeved at the top of the heat conduction sleeve, a rotary plate fixedly sleeved with the heat conduction sleeve is installed at the bottom of the movable plate, a baffle fixedly sleeved with the welding gun main body is installed at the top of the movable plate, a heating rod movably sleeved with the heat conduction sleeve is fixedly sleeved on the baffle, and a touch plate of an annular structure fixedly sleeved with an outer ring of the heat conduction sleeve is installed at the bottom of the rotary plate.

Preferably, the material pushing assembly comprises a blocking block fixedly connected with the bottom of the heat conduction sleeve, a butt sleeve slidably connected along the length direction of the welding gun main body is movably sleeved at the bottom of the blocking block, a supporting rod fixedly connected with the bottom of the blocking block is installed on an inner ring of the butt sleeve, a conveying blade of a spiral structure is fixedly sleeved on an outer ring of the supporting rod, a conveying channel communicated with the inside of the top of the butt sleeve penetrates through the top of the butt sleeve, and a welding nozzle is fixedly connected with one end of the butt sleeve extending out of the bottom of the welding gun main body.

Preferably, the runner assembly includes the dwang that cup joints with the baffle activity, the one end that the dwang stretches out the baffle bottom has cup jointed the switching sleeve pipe along its length direction sliding connection, switching sleeve pipe and fly leaf are fixed to be cup jointed, the fixed cover of one end outer lane that the switching sleeve pipe stretches out the fly leaf bottom has connect first gear, one side meshing of first gear has the gear circle with carousel top rigid coupling, the one end outer lane that the dwang stretches out the baffle top is connected with and send the drive mechanism that the subassembly is connected, the first motor with welder main part top rigid coupling is installed at the top of dwang.

Preferably, send the silk subassembly include with the housing of welder main part rigid coupling, the inside activity of housing has cup jointed the fixed guide wheel that sets up along welder main part length direction equidistance, connect through the mode of sprocket chain between the adjacent fixed guide wheel, one side top that welder main part was kept away from to fixed guide wheel is installed the inlet wire pipe that cup joints with the housing, one side below that welder main part was kept away from to the inlet wire pipe is installed the clamping mechanism with housing inside wall sliding connection, one side top that the fixed guide wheel of bottommost is close to welder main part is installed the guiding tube that cup joints with welder main part is fixed, and the other end of guiding tube extends to and supports touch panel top.

Preferably, the clamping mechanism comprises a push plate of an L-shaped structure which is in sliding sleeve connection with the housing, a clamping roller which is distributed along the length direction of the welding gun main body is movably sleeved on one side of the push plate, the clamping roller and the fixed guide wheel are arranged in parallel, and an adjusting rod which is in threaded sleeve connection with the housing is movably sleeved on one side of the push plate which is far away from the welding gun main body.

Preferably, the transmission mechanism comprises a supporting rod movably sleeved with the inner side wall of the top of the housing, a first bevel gear is fixedly sleeved at the bottom of the supporting rod, a second bevel gear fixedly sleeved with a topmost fixed guide wheel is meshed at one side of the first bevel gear, and the supporting rod is connected with the rotating rod in a chain and chain wheel mode.

Preferably, a first spring is fixedly connected between the movable plate and the baffle, two conductive blocks are fixedly connected to the bottom of the baffle, a conductive sheet located right below the conductive blocks is fixedly connected to the top of the movable plate, and two contacts are installed between the rotary table and the abutting plate.

Preferably, the welder main part is including the casing that is used for the installation to send a subassembly, installation mechanism, runner assembly and heating element, the bottom rigid coupling of casing have with the contact ring of the loop configuration of shutoff piece butt, the bottom rigid coupling of contact ring has the extension pipe that cup joints with the activity of butt sleeve pipe, the guide way that sets up along its length direction is seted up to the inside wall of extension pipe, the inside slide of guide way has cup jointed the guide strip that cup joints with butt sleeve pipe slide, the guide strip stretches into the one end rigid coupling of guide way has the second spring of consolidating with guide way tip inside wall.

Preferably, the mounting mechanism comprises a mounting rod of an L-shaped structure fixedly connected with the top of the welding gun main body, and the top of the mounting rod is provided with a loop-shaped conductive coil arranged along the length direction of the mounting rod.

In the present invention,

through the welder main part that sets up, a housing, the contact ring, the extension pipe, installation mechanism, send a subassembly, the housing, fixed guide wheel, the guiding tube, the inlet wire pipe, clamping mechanism, the runner assembly, the dwang, the adapter sleeve, drive mechanism, heating element, the heat conduction sleeve pipe, the carousel, the fly leaf, the heating rod, the baffle, the touch panel, push away the material subassembly, the shutoff piece, the butt sleeve pipe, branch, conveyor blade, delivery channel and welding nozzle, make this design realize that the welding wire in the welding process in MOSFET device production process send the line, melt and welding operation, can adjust welding transport volume as required, can accomplish to stop the operation along with welding, improve MOSFET device welding efficiency and quality, accord with the welding needs of MOSFET device different positions, reduce operating personnel intensity of labour.

Drawings

FIG. 1 is a schematic structural diagram of a welding apparatus for MOSFET device production according to the present invention;

FIG. 2 is a partially enlarged schematic structural view of a soldering apparatus for MOSFET device production according to the present invention;

FIG. 3 is a schematic structural diagram of a wire feeding assembly of a welding device for MOSFET device production according to the present invention;

FIG. 4 is a schematic structural diagram of a heating assembly of a soldering apparatus for MOSFET device production according to the present invention;

fig. 5 is a schematic structural diagram of a material pushing assembly of a welding device for MOSFET device production according to the present invention.

In the figure: the welding gun comprises a welding gun body 1, a shell 11, a contact ring 12, an extension pipe 13, a mounting mechanism 2, a wire feeding assembly 3, a housing 31, a fixed guide wheel 32, a guide pipe 33, a wire inlet pipe 34, a clamping mechanism 35, a rotating assembly 4, a rotating rod 41, a switching sleeve 42, a transmission mechanism 43, a heating assembly 5, a heat conduction sleeve 51, a rotating disk 52, a movable plate 53, a heating rod 54, a baffle 55, a contact plate 56, a material pushing assembly 6, a sealing block 61, a contact sleeve 62, a support rod 63, a conveying blade 64, a conveying channel 65 and a welding nozzle 66.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, a welding device for MOSFET device production comprises a welding gun main body 1, a heating assembly 5 is installed inside the welding gun main body 1, a rotating assembly 4 is installed on the top of the heating assembly 5, a pushing assembly 6 sleeved with the welding gun main body 1 is connected to the bottom of the heating assembly 5, an installation mechanism 2 is fixedly connected to one side of the top of the welding gun main body 1, and a wire feeding assembly 3 connected with the rotating assembly 4 is installed on the other side of the top of the welding gun main body 1;

further, heating element 5 is including setting up at the inside heat conduction sleeve 51 of welder main part 1, the top activity of heat conduction sleeve 51 is cup jointed along the gliding fly leaf 53 of welder main part 1 length direction, the fixed carousel 52 that cup joints with heat conduction sleeve 51 is installed to the bottom of fly leaf 53, the fixed baffle 55 that cup joints with welder main part 1 is installed at the top of fly leaf 53, baffle 55 is fixed to be cup jointed with the heating rod 54 that cup joints with heat conduction sleeve 51 activity, the conflict board 56 of the fixed annular structure who cup joints with heat conduction sleeve 51 outer lane is installed to the bottom of carousel 52.

Particularly, the pushing assembly 6 comprises a blocking block 61 fixedly connected with the bottom of the heat conducting sleeve 51, a butting sleeve 62 slidably sleeved along the length direction of the welding gun main body 1 is movably sleeved at the bottom of the blocking block 61, a supporting rod 63 fixedly connected with the bottom of the blocking block 61 is mounted on the inner ring of the butting sleeve 62, a conveying blade 64 of a spiral structure is fixedly sleeved on the outer ring of the supporting rod 63, a conveying channel 65 communicated with the inside of the butting sleeve 62 penetrates through the top of the butting sleeve 62, and a welding nozzle 66 is fixedly connected to one end, extending out of the bottom of the welding gun main body 1, of the butting sleeve 62.

Specifically, rotating assembly 4 includes dwang 41 with baffle 55 activity cup joint, the one end that dwang 41 stretches out baffle 55 bottom has cup jointed the switching sleeve pipe 42 along its length direction sliding connection, switching sleeve pipe 42 and fly leaf 53 are fixed to be cup jointed, the fixed cover in one end outer lane that switching sleeve pipe 42 stretches out fly leaf 53 bottom has been cup jointed first gear, one side meshing of first gear has the gear circle with carousel 52 top rigid coupling, the one end outer lane that dwang 41 stretches out baffle 55 top is connected with the drive mechanism 43 who is connected with a subassembly 3 that send, the first motor with welder main part 1 top rigid coupling is installed at the top of dwang 41.

Further, the wire feeding assembly 3 comprises a housing 31 fixedly connected with the welding gun body 1, fixed guide wheels 32 equidistantly arranged along the length direction of the welding gun body 1 are movably sleeved in the housing 31, the adjacent fixed guide wheels 32 are connected with each other in a chain wheel chain mode, a wire inlet pipe 34 connected with the housing 31 is installed above one side, away from the welding gun body 1, of each fixed guide wheel 32, a clamping mechanism 35 connected with the inner side wall of the housing 31 in a sliding mode is installed below one side, away from the welding gun body 1, of each wire inlet pipe 34, a guide pipe 33 fixedly connected with the welding gun body 1 is installed above one side, close to the welding gun body 1, of each fixed guide wheel 32 at the bottommost, and the other end of each guide pipe 33 extends to the top of the.

It should be noted that the clamping mechanism 35 includes a push plate of an L-shaped structure slidably sleeved with the housing 31, a clamping roller wheel distributed along the length direction of the welding gun body 1 is movably sleeved on one side of the push plate, the clamping roller wheel is parallel to the fixed guide wheel 32, and an adjusting rod screwed with the housing 31 is movably sleeved on one side of the push plate away from the welding gun body 1.

In addition, the transmission mechanism 43 includes a support rod movably sleeved on the inner side wall of the top of the housing 31, a first bevel gear is fixedly sleeved on the bottom of the support rod, a second bevel gear fixedly sleeved on the topmost fixed guide wheel 32 is meshed on one side of the first bevel gear, and the support rod is connected with the rotating rod 41 in a chain and chain wheel mode.

In addition, a first spring is fixedly connected between the movable plate 53 and the baffle 55, two conductive blocks are fixedly connected to the bottom of the baffle 55, a conductive sheet located right below the conductive blocks is fixedly connected to the top of the movable plate 53, and two contacts are installed between the rotary table 52 and the abutting plate 56.

The first embodiment is as follows:

welder main part 1 is including being used for the installation to send a subassembly 3, installation mechanism 2, the casing 11 of runner assembly 4 and heating element 5, the bottom rigid coupling of casing 11 has the contact ring 12 with the loop configuration of shutoff piece 61 butt, the bottom rigid coupling of contact ring 12 has the extension pipe 13 that cup joints with the activity of butt sleeve pipe 62, the guide way that sets up along its length direction is seted up to the inside wall of extension pipe 13, the inside slide of guide way has cup jointed the guide strip that cup joints with butt sleeve pipe 62 slide, the guide strip stretches into the one end rigid coupling of guide way has the second spring with the consolidation of guide way tip inside wall.

Example two:

the mounting mechanism 2 comprises a mounting rod of an L-shaped structure fixedly connected with the top of the welding gun main body 1, and a conductive coil of an annular structure arranged along the length direction of the mounting rod is mounted at the top of the mounting rod.

Example three:

the cross section of one end of the rotating rod 41 extending into the adapter sleeve 42 is of a regular polygon structure, the cross section of the inner ring of the adapter sleeve 42 is consistent with the cross section of the bottom of the rotating rod 41, and the opening at the top of the adapter sleeve 42 is provided with a guide groove which is obliquely arranged.

Example four:

the control box is installed to one side of welder main part 1, and the internally mounted of control box has the controller, and power source, data interface and ship type switch are installed to one side of control box, and the controller adopts the ARM singlechip, and two conducting blocks are connected with one of them group input of controller, and two contacts are connected with another group input of controller, and the controller is connected with heating pipe, first motor, power source, data interface and ship type switch electricity.

The working principle is as follows: when the welding gun is used, in order to facilitate welding wire installation, an operation window is arranged on the side wall of one side of the welding gun main body 1 adjacent to the housing 31, when the welding wire is installed, the adjusting rod positioned on the push plate is rotated, under the action of threads, the clamping roller on the push rod moves towards the direction far away from the fixed guide wheel 32, then the welding wire penetrates out along the wire guiding ring at the top of the installation mechanism 2, then the wire inlet pipe 34 at the top of the housing 31 extends into the housing 31, then the hand of an operator extends into the housing 31 from the operation window, the welding wire is sequentially pulled downwards along the outer side of the fixed guide wheel 32, then the welding wire penetrates into the welding gun main body 1 from the guide pipe 33, then the adjusting rod is rotated, so that the clamping roller moves to the outer ring of the fixed guide wheel 32, meanwhile, the outer rings of the fixed guide wheel 32 and the clamping roller are both, thereby completing the installation operation of the welding wire;

when the welding wire is melted after the welding wire is installed, the heating rod 54 on the heating assembly 5 inside the welding gun body 1 starts to heat, the heat conducting sleeve 51 transmits the heat to the abutting plate 56, the first motor on the rotating assembly 4 is started to drive the rotating rod 41 to rotate, the rotating rod 41 drives the transmission mechanism 43 to move, so that the transmission mechanism 43 drives the fixed guide wheel 32 at the topmost part to rotate, then the fixed guide wheel 32 conveys the welding wire downwards when rotating, the welding wire continuously enters the welding gun body 1 along the guide pipe 33 at the moment, the welding wire entering the welding gun body 1 is heated by the heat conducting sleeve 51 and the abutting plate 56 in a contact manner, and simultaneously, under the action of the first spring at the bottom of the baffle 55, the movable plate 53 is at the bottommost position, and the blocking block 61 at the bottom of the heat conducting sleeve 51 is in close contact with the contact ring 12 on the welding gun body 1, the melted welding wire is stored above the top of the sealing block 61, until the melted metal liquid is contacted with two contacts of the shell 11 of the welding gun main body 1, a group of trigger signals formed by the two contacts are triggered, the controller controls the first motor to stop rotating, and the situation indicates that the welding wire is prepared before welding;

during welding, the mounting rod on the mounting mechanism 2 is connected to a power device capable of driving the welding gun body 1 to move up and down, left and right and back and forth, such as a six-axis linear module or a six-axis industrial robot, during welding, the power device drives the welding gun body 1 to move to a position where a clamped MOSFET device needs to be welded, when a welding tip 66 at the bottom of the welding gun body 1 contacts the MOSFET device, the welding tip 66 moves upwards relative to the welding gun body 1 along with the downward movement of the welding gun body 1, so that the heat-conducting sleeve 51 moves upwards, at this time, the movable plate 53 and the rotary disc 52 both move upwards along with the heat-conducting sleeve 51, the conducting plate at the top of the movable plate 53 contacts with the two conducting blocks at the bottom of the baffle 55, a group of trigger signals formed by the two conducting blocks is triggered, the controller controls a first electric start to perform wire feeding and welding operations, and at this, the switching sleeve 42 on the rotary disc 52 is butted with the rotary disc 41, the rotary disc 41 drives the switching sleeve 42 to rotate, the rotary disc 52 rotates under the combination of the first gear and the gear ring, then the heat conduction sleeve 51 rotates, the heat conduction sleeve 51 drives the blocking block 61 to rotate, then the blocking block 61 drives the supporting rod 63 at the bottom of the blocking block to rotate together, at this time, the conveying blade 64 on the supporting rod 63 rotates relative to the abutting sleeve 62, so that the metal liquid flowing downwards from the side edge of the blocking block 61 enters the inner ring of the abutting sleeve 62 along the conveying channel 65, then the conveying blade 64 is conveyed downwards to the position of the welding nozzle 66, then the follow-up power device drives the welding gun body 1 to move for welding, the conveying amount of the welding metal liquid is realized according to the rotating speed of the first motor, when the upward movement welding stops, the opposite steps are carried out,

the design realizes the wire feeding, melting and welding operation of the welding wire in the welding process in the production process of the MOSFET device, can adjust the welding conveying capacity as required, can perform the operation of welding and stopping at any time, improves the welding efficiency and quality of the MOSFET device, meets the welding requirements of different positions of the MOSFET device, and reduces the labor intensity of operators.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

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 invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A welding device for MOSFET device production comprises a welding gun main body (1) and is characterized in that a heating component (5) is installed inside the welding gun main body (1), a rotating component (4) is installed at the top of the heating component (5), a pushing component (6) which is sleeved with the welding gun main body (1) is connected to the bottom of the heating component (5), an installation mechanism (2) is fixedly connected to one side of the top of the welding gun main body (1), and a wire feeding component (3) which is connected with the rotating component (4) is installed on the other side of the top of the welding gun main body (1);

heating element (5) is including setting up heat-conducting sleeve (51) at welder main part (1) inside, heat-conducting sleeve (51) top activity has been cup jointed along welder main part (1) length direction gliding fly leaf (53), carousel (52) that cup joints with heat-conducting sleeve (51) is fixed installed to the bottom of fly leaf (53), baffle (55) that cup joints with welder main part (1) is fixed are installed at the top of fly leaf (53), and baffle (55) are fixed to cup joint heating rod (54) that cup joints with heat-conducting sleeve (51) activity, contact plate (56) of the fixed annular structure that cup joints with heat-conducting sleeve (51) outer lane are installed to the bottom of carousel (52).

2. The welding device for MOSFET device production according to claim 1, wherein the pushing assembly (6) comprises a blocking block (61) fixedly connected with the bottom of the heat conducting sleeve (51), an abutting sleeve (62) slidably sleeved along the length direction of the welding gun body (1) is movably sleeved on the bottom of the blocking block (61), a support rod (63) fixedly connected with the bottom of the blocking block (61) is installed on an inner ring of the abutting sleeve (62), a conveying blade (64) of a spiral structure is fixedly sleeved on an outer ring of the support rod (63), a conveying channel (65) communicated with the inside of the abutting sleeve (62) penetrates through the top of the abutting sleeve (62), and a welding nozzle (66) is fixedly connected to one end, extending out of the bottom of the welding gun body (1), of the abutting sleeve (62).

3. The welding device for producing the MOSFET device, according to claim 1, wherein the rotating assembly (4) comprises a rotating rod (41) movably sleeved with a baffle (55), one end of the rotating rod (41) extending out of the bottom of the baffle (55) is sleeved with a switching sleeve (42) slidably connected along the length direction of the rotating rod, the switching sleeve (42) is fixedly sleeved with the movable plate (53), an outer ring of one end of the switching sleeve (42) extending out of the bottom of the movable plate (53) is fixedly sleeved with a first gear, a gear ring fixedly connected with the top of the turntable (52) is meshed with one side of the first gear, an outer ring of one end of the rotating rod (41) extending out of the top of the baffle (55) is connected with a transmission mechanism (43) connected with the wire feeding assembly (3), and a first motor fixedly connected with the top of the welding gun body (1) is installed at the top of.

4. The welding device for MOSFET device production according to claim 1, wherein the wire feeding assembly (3) comprises a housing (31) fixedly connected with the welding gun body (1), fixed guide wheels (32) equidistantly arranged along the length direction of the welding gun body (1) are movably sleeved in the housing (31), adjacent fixed guide wheels (32) are connected in a chain wheel chain manner, a wire inlet pipe (34) sleeved with the housing (31) is installed above one side of the fixed guide wheels (32) far away from the welding gun body (1), a clamping mechanism (35) slidably connected with the inner side wall of the housing (31) is installed below one side of the wire inlet pipe (34) far away from the welding gun body (1), a guide pipe (33) fixedly sleeved with the welding gun body (1) is installed above one side of the bottommost fixed guide wheel (32) close to the welding gun body (1), and the other end of the guide tube (33) extends above the top of the abutment plate (56).

5. The welding device for MOSFET device production as recited in claim 4, wherein the clamping mechanism (35) comprises a push plate of L-shaped structure slidably received in the housing (31), the push plate has a side movably received clamping rollers distributed along the length of the welding gun body (1), the clamping rollers are parallel to the fixed guide wheel (32), and the side of the push plate away from the welding gun body (1) is movably received an adjusting rod threadedly received in the housing (31).

6. The welding device for MOSFET device production as recited in claim 3, wherein the transmission mechanism (43) comprises a support rod movably sleeved with the inner side wall of the top of the housing (31), a first bevel gear is fixedly sleeved at the bottom of the support rod, a second bevel gear fixedly sleeved with the topmost fixed guide wheel (32) is meshed at one side of the first bevel gear, and the support rod is connected with the rotating rod (41) by means of a chain sprocket.

7. The welding device for producing the MOSFET device as recited in claim 1, wherein a first spring is fixedly connected between the movable plate (53) and the baffle plate (55), two conductive blocks are fixedly connected to the bottom of the baffle plate (55), a conductive sheet directly below the conductive blocks is fixedly connected to the top of the movable plate (53), and two contacts are installed between the rotary plate (52) and the touch plate (56).

8. The welding device for MOSFET device production according to claim 1, wherein the welding gun body (1) comprises a housing (11) for installing the wire feeding assembly (3), the installation mechanism (2), the rotating assembly (4) and the heating assembly (5), a contact ring (12) of an annular structure abutted to the blocking block (61) is fixedly connected to the bottom of the housing (11), an extension pipe (13) movably sleeved with the abutting sleeve (62) is fixedly connected to the bottom of the contact ring (12), a guide groove arranged along the length direction of the extension pipe (13) is formed in the inner side wall of the extension pipe, a guide strip sleeved with the abutting sleeve (62) slide is sleeved on the inner slide of the guide groove, and a second spring fixedly connected with the inner side wall of the guide groove end is fixedly connected to one end of the guide groove.

9. The bonding apparatus for MOSFET device production as claimed in claim 1, wherein said mounting mechanism (2) comprises an L-shaped mounting bar affixed to the top of the body (1) of the bonding gun, the top of the mounting bar having a loop-shaped conductive loop disposed along its length.