CN114769813A

CN114769813A - Welding device and method

Info

Publication number: CN114769813A
Application number: CN202210703258.2A
Authority: CN
Inventors: 张宇峰; 郑远生; 安磊
Original assignee: Beijing Shiweitong Technology Co ltd
Current assignee: Beijing Shiweitong Technology Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-07-22
Anticipated expiration: 2042-06-21
Also published as: CN114769813B

Abstract

The application provides a welding device and a method, wherein the welding device comprises a base; a first bracket disposed on the base; the second bracket is arranged on the base, the second bracket and the first bracket are oppositely arranged in the longitudinal direction, and the distance between the second bracket and the first bracket is adjustable; the clamping component is arranged on the first support and used for clamping a part to be welded; the setting is in electric heating member on the second support, electric heating member is used for at least part to surround in week and waits to weld in order to add the hot type welding, and this welding set reliability is high, through the corresponding relation of first support and second support, can guarantee accurate local welding, simultaneously, heats the welding through electric heating member enclosed and helps guaranteeing welding quality.

Description

Welding device and method

Technical Field

The invention belongs to the technical field of optical fiber welding, and particularly relates to a welding device and a welding method.

Background

With the wider and wider application of the optical fiber, the requirements on devices made of the optical fiber are higher and higher, so that the optical fiber with a sealing structure is applied more and more. At present, an optical fiber sealing structure has two modes, one is to plate nickel, chromium, gold and other metals on an optical fiber so as to achieve the purpose of local metallization of the optical fiber, then a tin-gold solder is used for welding the metallized optical fiber and a metal sleeve together, and the other is to directly weld the optical fiber and the metal sleeve together by using a glass solder with a small thermal expansion coefficient. Both approaches require the use of welding equipment.

In the prior art, a heat source for heating, such as an electric soldering iron, is directly applied to contact with the solder to melt the solder for soldering. But the quality of the weld is to be improved.

Disclosure of Invention

The present invention is directed to a welding apparatus and method that addresses some or all of the above-discussed problems of the prior art. This welding set reliability is high, through the corresponding relation of first support and second support, can guarantee accurate local welding, simultaneously, heats the welding through electric heating member enclosed and helps ensureing welding quality.

According to an aspect of the present invention, there is provided a welding apparatus including:

a base seat is arranged on the base seat,

a first bracket arranged on the base seat,

a second bracket arranged on the base, wherein the second bracket and the first bracket are arranged oppositely in the longitudinal direction and the distance between the second bracket and the first bracket is adjustable,

a clamping component arranged on the first bracket and used for clamping a part to be welded,

an electric heating member provided on the second support for at least partially surrounding the member to be welded in the circumferential direction for heating welding.

In one embodiment, the clamping assembly comprises:

an upper holder having an upper holding groove facing the second bracket,

a lower holder disposed below the upper holder, the lower holder having a lower holding groove facing the second bracket, the lower holding groove vertically communicating with the upper holding groove,

the upper clamp holder and one side, deviating from the second support, of the lower clamp holder are fixedly connected and detachably connected with the first support.

In one embodiment, the upper clamp includes:

an upper clamping body is arranged on the upper clamping body,

an upper clamping movable block, the upper clamping movable block and the upper clamping body are arranged in a transverse opposite manner, and a first through hole which is transversely communicated is arranged on the upper clamping movable block,

go up adjusting bolt and be provided with first step face and be used for making go up adjusting bolt's screw rod end's diameter diminishes, go up adjusting bolt's screw rod end and pass behind the first through-hole with go up centre gripping body threaded connection just first step face butt arrives go up deviating from of centre gripping movable block go up on the outer wall of centre gripping body.

In one embodiment, a second step surface is provided on an inner wall of the first through hole for increasing a diameter of the inner wall of the first through hole near one end of the upper clamping body, and an upper elastic restoring member is provided between the second step surface and the upper clamping body.

In one embodiment, the lower clamp includes:

a lower clamping body, a second through hole which is transversely penetrated is arranged on the lower clamping body, a third step surface is arranged on the inner wall of the second through hole,

a lower clamping moving block which is arranged opposite to the lower clamping body in the transverse direction and is connected with the lower clamping body in the transverse sliding manner,

a lower adjusting bolt, wherein the screw end of the lower adjusting bolt penetrates through the second through hole and then is in threaded connection with the lower clamping moving block, a fourth step surface is arranged on the outer wall of the lower adjusting bolt and used for reducing the diameter of the screw end,

and the two ends of the lower elastic resetting piece are respectively abutted between the third step surface and the fourth step surface.

In one embodiment, a lower object placing table opposite to the lower clamping moving block is fixed on the lower clamping body, and a fifth step surface is arranged at the lower end of the lower clamping body.

In one embodiment, a sliding table for fixing the second support is arranged on the base and used for longitudinally sliding relative to the base, and a transverse fine adjustment platform and a longitudinal fine adjustment platform are arranged between the sliding table and the second support.

In one embodiment, a stopper is provided on the base for limiting the second bracket to be further close to the first bracket.

In one embodiment, the electric heating element is a tungsten filament heater, an insulating plate is arranged on the second support, two tungsten filament lower clamping pieces which are oppositely distributed in the transverse direction are arranged on the upper end surface of the insulating plate, oppositely extending tungsten filament lower clamping portions are arranged on the tungsten filament lower clamping pieces, a tungsten filament upper clamping piece is arranged on the top surface of each tungsten filament lower clamping piece, oppositely extending tungsten filament upper clamping portions are arranged on the tungsten filament upper clamping pieces, one end of the tungsten filament heater is clamped by the tungsten filament lower clamping portions and the tungsten filament upper clamping portions which are on the same side, two ends of the tungsten filament heater are connected with a constant temperature controller, a thermocouple is arranged on the outer side of the tungsten filament heater, and the thermocouple is in signal connection with the constant temperature controller.

By another aspect of the invention, a method for welding by using the welding device is provided, which includes:

step one, clamping the part to be welded through the clamping assembly,

step two, adjusting the distance between the first bracket and the second bracket to ensure that the machine to be welded is positioned at the welding position,

and step three, starting the electric heating element to heat for welding.

Compared with the prior art, the invention has the advantages that: through the corresponding relation of first support and second support, can guarantee accurate local welding, simultaneously, at least partly enclose through electric heating member and heat the welding and help ensureing welding quality partially.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

fig. 1 shows a first state diagram of a welding device according to the invention;

FIG. 2 is an enlarged view at A from FIG. 1;

FIG. 3 shows a second state diagram of a welding device according to the invention;

FIG. 4 is an enlarged view at B from FIG. 3;

FIG. 5 shows an upper clamp of a welding device according to the invention;

FIG. 6 shows a lower clamp of a welding device according to the invention;

FIG. 7 shows the upper and lower clamps during a clamping operation;

fig. 8 shows a second holder of the welding device according to the invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and are not exhaustive of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.

An embodiment of the invention provides a welding device. As shown in fig. 1 and 2, the welding apparatus includes a base 1, a first bracket 2, a second bracket 3, a clamping assembly 4, and an electric heater 5. The base 1 is configured as a plate, and mainly serves as a foundation support. The first support 2 is arranged on the base 1 and is mainly used for supporting. The second bracket 3 is arranged on the base 1 and is also used for supporting. Meanwhile, the second bracket 3 is disposed opposite to the first bracket 2 in the longitudinal direction (corresponding to the left-right direction in fig. 1), and the distance between the second bracket 3 and the first bracket 2 is adjustable. The clamping assembly 4 is disposed on the first bracket 2 for clamping the member to be welded 200. The electric heater 5 is provided on the second bracket 3 for heating welding the to-be-welded member 200 circumferentially at least partially in a surrounding manner.

In the present application, the weldment 200 is clamped by the clamping assembly 4. Then, by adjusting the distance between the second stand 3 and the first stand 2, the work to be welded 200 is brought close to the electric heater 5 to be heated. And, the electric heater 5 heats the part to be welded 200 in a surrounding manner at least partially, thereby completing the welding. Therefore, accurate local welding can be ensured through the corresponding relation of the first bracket 2 and the second bracket 3. Meanwhile, the welding by heating through the electric heating element 5 helps to guarantee the welding quality.

In one embodiment, as shown in fig. 2, the clamping assembly 4 includes an upper clamp 41 and a lower clamp 42. The upper clamp 41 has an upper clamp slot 411 facing the second bracket 3 for clamping the pigtail assembly 201 of the part 200 to be welded. The lower holder 42 is disposed below the upper holder 41 for holding the metal sleeve 204 of the member to be welded 200. Meanwhile, the lower holder 42 has a lower holder groove 421 facing the second bracket 3. The lower grip groove 421 is vertically communicated with the upper grip groove 411. The upper holder 41 and the lower holder 42 are fixedly connected together on the side facing away from the second bracket 3 and detachably connected with the first bracket 2. For example, the ends of the upper and

lower clamps

41, 42 facing away from the clamping are fixedly connected to a fixing plate 43, and the fixing plate 43 is screwed to the vertical fine adjustment platform 9. That is, the upper holder 41 and the lower holder 42 can be removed together from the first rack 2 and fitted to the first rack 2. The clamping assembly 4 can clamp the metal sleeve 204 and the tail fiber assembly 201 of the to-be-welded part 200 respectively, so that the welding position between the metal sleeve 204 and the tail fiber assembly 201 is guaranteed, the welding quality is improved, and the crosstalk qualified rate of the tail fiber is improved.

As shown in fig. 5, the upper clamper 41 includes an upper clamper body 412, an upper clamper moving block 413, and an upper adjusting bolt 414. The upper holding block 413 is provided to face the upper holding body 412 in the lateral direction (the same as the front-back direction in fig. 1), and a first through hole 415 penetrating in the lateral direction is provided in the upper holding block 413. A first step surface 416 is provided on the upper adjustment bolt 414 for making the diameter of the screw end of the upper adjustment bolt 414 small. The screw end of the upper adjusting bolt 414 passes through the first through hole 415 and then is in threaded connection with the upper clamping body 412, and the first step surface 416 abuts against the outer wall of the upper clamping moving block 413 which is away from the upper clamping body 412. A second step surface 417 is provided on an inner wall of the first through hole 415 for making an inner diameter of the first through hole 415 near one end of the upper clamp body 412 large. An upper elastic restoring member 418 is provided between the second step surface 417 and the upper clamp body 412. Preferably, the upper elastic return member 418 is a spring and is sleeved on the outer wall of the upper adjusting bolt 414. Thus, during screwing of the upper adjusting bolt 414, since the upper clamp body 412 is confined, the upper adjusting bolt 414 not only axially rotates about itself, but also axially moves toward or away from the upper clamp body 412. For example, as the upper adjusting bolt 414 approaches the upper clamping block 413, the first stepped surface 416 applies a driving force to the upper clamping block 413 to actuate the upper clamping block 413 to move in a direction approaching the upper clamping body 412, so that the width of the upper clamping slot 411 is reduced to complete the clamping operation. At this time, the upper elastic restoring member 418 is compressed for energy storage. Conversely, the first step surface 416 removes the driving force against the upper clamping shoe 413 as the upper adjustment bolt 414 moves away from the upper clamping shoe 413. The upper clamping moving block 413 is actuated to move by the self-elastic force of the upper elastic restoring member 418, so that the upper clamping slot 411 completes the opening operation. In addition, an upper object placing table 419 is arranged on the upper clamping body 412, and the upper object placing table 419 is arranged opposite to the upper clamping moving block 413 so as to be used for placing the pigtail assembly 201 in installation and facilitate clamping operation. It should be appreciated that the top stage 419 has a transverse dimension that is less than the transverse dimension of the pigtail assembly 201 to enable the pigtail assembly 201 to be clamped.

As shown in fig. 6, the lower clamp 42 includes a lower clamp body 422, a lower clamp moving block 423, a lower adjustment bolt 424, and a lower elastic restoring member 425. The lower clamp body 422 is provided with a second through hole 426 extending in the lateral direction. And a third step surface 427 is provided on the inner wall of the second through hole 426. The lower clamping moving block 423 and the lower clamping body 422 are arranged oppositely in the transverse direction, and the lower clamping moving block 423 and the lower clamping body 422 are connected in the transverse sliding manner. That is, the lower clamping block 423 can only move laterally relative to the lower clamping body 422, and cannot move in other directions such as rotating relative to the lower clamping body 422. For example, the lower clamping moving block 423 and the lower clamping body 422 may be in a dovetail sliding groove and sliding rail fit connection for guiding and limiting. The screw end of the lower adjusting bolt 424 is threaded with the lower clamping movable block 423 after passing through the second through hole 426. A fourth step surface 428 is provided on the outer wall of the lower adjusting bolt 424 for making the diameter of the screw end small. Both ends of the lower elastic restoring member 425 abut between the third step surface 427 and the fourth step surface 428, respectively. Preferably, the lower elastic return member 425 is a spring sleeved on the outer wall of the lower adjusting bolt 424. In use, the lower adjusting bolt 424 is pushed to move transversely to compress the lower elastic restoring member 425, and at the same time, the lower clamping moving block 423 is driven to move transversely to open the lower clamping groove 421. After the metal sleeve 204 is put in, the pushing force on the lower adjusting bolt 424 is removed, and the lower clamping moving block 423 moves transversely, so that the lower clamping groove 421 is reduced. The elastic force generated by the pressing of the lower elastic restoring member 425 abuts against the fourth step surface 428 for the clamping operation of the lower clamping groove 421. It is understood that the distance between the third step surface 427 and the fourth step surface 428 can be adjusted by screwing the lower adjusting bolt 424, so as to adjust the initial tightening force of the lower elastic restoring member 425, so as to adjust the clamping force. This arrangement allows the metal sleeve 204 to be subjected to a clamping operation, and the clamping force is not so large as to protect the metal sleeve 204.

A lower stage 429 is fixed to the lower clamp body 422. The lower placing table 429 is arranged opposite to the lower clamping moving block 423 and is mainly used for placing the metal sleeve 204 during the clamping operation. A fifth step surface 430 (shown in fig. 7) is provided at the lower end of the lower clamping body 422, and is mainly used for receiving the metal sleeve 204 during a welding operation, so as to ensure the position and safety of the metal sleeve 204.

In one embodiment, as shown in fig. 3, a slide table 6 for fixing the second bracket 3 is provided on the base 1. The sliding table 6 is used for sliding longitudinally relative to the base 1. A limiting block 7 is arranged on the base 1 to limit the second bracket 3 to be close to the first bracket 2. And a locking screw 61 is arranged between the sliding table 6 and the base 1 and used for locking the sliding table 6 on the base 1. In a practical configuration, the displacement table 6 can be constructed on the second carriage 3. In the process that the sliding table 6 drives the second support 3 to slide, the sliding table gradually approaches the first support 2 until the limiting block 7 is met, the limiting block 7 limits the sliding table 6 to continuously move, and coarse adjustment is guaranteed to be in place. Then, the sliding table 6 is locked by the locking screw 61, and the sliding table 6 is prevented from moving accidentally. For example, the base 1 and the sliding table 6 are connected in a sliding rail and slider type.

And a transverse and longitudinal fine adjustment platform 8 is arranged between the sliding table 6 and the second bracket 3 and used for fine adjusting the position of the electric heater 5 in the transverse direction and the longitudinal direction so as to ensure the welding quality. A vertical fine-tuning platform 9 is arranged between the first bracket 2 and the clamping component 4 for vertical fine tuning. It should be noted that the horizontal and vertical fine tuning platforms 8 and the vertical fine tuning platform 9 can be fine tuning platforms in the prior art, and the detailed structure is not described herein.

As shown in fig. 1, the first bracket 2 and the second bracket 3 are each configured as a triangular frame for securing support stability. The first bracket 2 is provided on the base 1 by screws, for example. The second bracket 3 is arranged on the transverse and longitudinal fine adjustment platform 8 through screws.

As shown in fig. 8, the electric heating member 5 is configured as a tungsten wire heater. Specifically, two lower tungsten filament clamping members 51 are disposed on the upper end surface of the second bracket 3 in a laterally opposite manner. An insulating plate 52 is disposed between the lower tungsten filament clip 51 and the second bracket 3. And a tungsten wire lower clamping part 53 oppositely extending is arranged on the tungsten wire lower clamping piece 51. A tungsten upper clip 54 is provided on each tungsten lower clip 51. And a tungsten wire upper clamping part 55 oppositely extending is arranged on the tungsten wire upper clamping piece 54. The tungsten wire lower clamp part 53 and the tungsten wire upper clamp part 55 on the same side clamp one end of the tungsten wire heater. The lower clip 51 of tungsten wire is set to the second bracket 3 by an insulating bolt 56. The upper clip 54 is fixed to the lower clip 51 by a connecting bolt 57. Meanwhile, a nut 58 for crimping an output line of a thermostat 59 is provided on the connecting bolt 57. Thus, the connection of the ends of the tungsten filament heater to the thermostat controller 59 is achieved. A thermocouple 60 (shown in fig. 4) is disposed outside the tungsten filament heater, the thermocouple 60 is connected to a thermostatic controller 59, and is used for sensing the temperature of the tungsten filament heater and feeding the temperature back to the thermostatic controller 59, and the thermostatic controller 59 adjusts and controls the current supplied to the tungsten filament heater according to the temperature information fed back by the thermocouple 60, so as to ensure the proper temperature of the tungsten filament heater. Structurally, the thermocouple 60 is located outside the tungsten filament heater and at the symmetrical center. Preferably, the tungsten filament heater is configured in a circular arc shape, for example, in an omega shape, for better surrounding of the glass solder, improving the soldering quality.

The method of welding with the welding device is described in detail below with reference to fig. 1 to 8.

Step one, the clamping component 4 is taken down from the first bracket 2. The clamping assembly 4 is then placed on the work surface, wherein the placement of the clamping assembly 4 is shown in fig. 7. The installation and positioning of the pigtail assembly 201 and the metal sleeve 204 of the to-be-welded member 200 are completed under a microscope.

First, a bare fiber window of a certain length is stripped on the optical fiber of the pigtail assembly 201, and then the glass solder 203 and the metal sleeve 204 are sequentially passed through the optical fiber 202 and placed near the bare fiber window.

Then, the lower adjusting bolt 424 is pressed to move laterally to compress the lower elastic restoring member 425, and at the same time, the lower clamping moving block 423 is driven to move laterally to open the lower clamping groove 421. The metal sleeve 204 is placed on the placement table 429, and the lower end of the metal sleeve 204 abuts against the fifth step surface 430. The pushing force on the lower adjusting bolt 424 is removed, and the lower clamping moving block 423 moves transversely, so that the lower clamping groove 421 is reduced, and the metal sleeve 204 is clamped.

Then, in the process of loosely screwing the upper adjusting bolt 414 away from the upper clamping moving block 413, the driving force abutting on the upper clamping moving block 413 is removed. The upper elastic restoring member 418 itself urges the upper clamping moving block 413 to move, thereby allowing the upper clamping groove 411 to complete the opening operation. The pigtail assembly 201 is placed on the staging platform 419 in the upper retaining slot 411. When the adjustable screw-up adjusting bolt 414 approaches the upper clamping moving block 413, the first step surface 416 provides a driving force for the upper clamping moving block 413 to actuate the upper clamping moving block 413 to move toward the upper clamping body 412, so that the width of the upper clamping slot 411 is reduced to complete the clamping operation.

Finally, the clamping assembly 4, having clamped the pigtail assembly 201 and the metal sleeve 204, is mounted to the first bracket 2. The clamping component 4 and the first bracket 2 ensure the relative welding position of the metal sleeve 204 and the tail fiber component 201, and the tail fiber crosstalk qualification rate is improved.

And step two, adjusting the distance between the first support 2 and the second support 3. Specifically, the sliding table 6 is pushed to move, and then the second support 3 is driven to be close to the first support 2. Until the sliding table 6 meets the limiting block 7, the second support 3 moves in place. The position of the slide table 6 on the base 1 is defined by means of the locking screw 61. Then, the glass solder 203 is just in the middle of the tungsten filament heater by adjusting the transverse and longitudinal fine adjustment platforms 8 and the vertical fine adjustment platform 9.

Step three, the thermostat 59 is started. The current of the thermostatic controller 59 reaches the tungsten heater after passing through the connecting bolt 57 and the upper clamp 54, and the glass solder is heated by the heat generated by the tungsten heater for completing the welding. In the process, the thermocouple 60 senses the temperature of the tungsten filament heater and feeds the temperature back to the constant temperature controller 59, and the constant temperature controller 59 adjusts and controls the current transmitted to the tungsten filament heater according to the temperature information fed back by the thermocouple 60, so as to ensure the proper temperature of the tungsten filament heater, for example, the temperature of the tungsten filament heater is controlled at 380 ℃ of 360-. Thereby, accurate temperature control is completed, and the welding quality is ensured.

In this application, closed-loop control can be realized to the temperature, and tungsten filament resistance is a definite value, and the temperature is directly proportional with the power curve of input, guarantees that welding process can accomplish in 10 seconds, improves work efficiency. The soldering can be achieved regardless of whether the metal sleeve 204 is conductive or not. The welding is only left and right around the glass solder, and the welding damage to the optical fiber can be effectively reduced. For polarization maintaining fiber, the extinction ratio can reach a high level, greater than 30 db.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "longitudinal," "lateral," "vertical," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience in describing the invention and to simplify the description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such variations and/or modifications as fall within the scope of the invention, which are intended to be covered by the embodiments of the invention.

Claims

1. A welding device, comprising:

a base seat, a plurality of fixing holes and a plurality of fixing holes,

a first bracket arranged on the base seat,

a second bracket arranged on the base, wherein the second bracket and the first bracket are oppositely arranged in the longitudinal direction and the distance between the second bracket and the first bracket is adjustable,

2. The welding device of claim 1, wherein the clamping assembly comprises:

an upper holder having an upper holding groove facing the second bracket,

one side of the upper clamp holder and one side of the lower clamp holder, which is far away from the second support, are fixedly connected and detachably connected with the first support.

3. The welding device of claim 2, wherein the upper clamp comprises:

an upper clamping body is arranged on the upper clamping body,

an upper clamping moving block, the upper clamping moving block and the upper clamping body are arranged in a transverse opposite manner, a first through hole which is transversely communicated is arranged on the upper clamping moving block,

go up adjusting bolt and be provided with first step face and be used for making go up adjusting bolt's the diameter of screw rod end diminishes, go up adjusting bolt's screw rod end and pass behind the first through-hole with go up centre gripping body threaded connection just first step face butt arrives go up deviating from of centre gripping movable block go up on the outer wall of centre gripping body.

4. The welding device according to claim 3, wherein a second step surface is provided on an inner wall of the first through hole for making a diameter of the inner wall of the first through hole near one end of the upper clamping body larger, and an upper elastic returning member is provided between the second step surface and the upper clamping body.

5. The welding device of claim 2, wherein the lower clamp comprises:

a lower clamping moving block which is arranged opposite to the lower clamping body in the transverse direction and is connected with the lower clamping body in a transverse sliding manner,

6. The welding device according to claim 5, wherein a lower placing table opposed to the lower holding moving block is fixed to the lower holding body, and a fifth step surface is provided at a lower end of the lower holding body.

7. The welding device of claim 1, wherein a sliding table is provided on the base for securing the second support, the sliding table being adapted to slide longitudinally relative to the base, and a fine transverse and longitudinal adjustment platform is provided between the sliding table and the second support.

8. Welding device according to claim 7, wherein a stop is provided on the base for limiting the further approach of the second bracket to the first bracket.

9. The welding apparatus according to any one of claims 1 to 8, wherein the electric heating member is configured as a tungsten filament heater, and an insulating plate is provided on the second support, two lower tungsten filament clamps are provided on an upper end surface of the insulating plate, which are oppositely arranged in a lateral direction, and oppositely extending lower tungsten filament clamps are provided on the lower tungsten filament clamps, an upper tungsten filament clamp is provided on a top surface of each of the lower tungsten filament clamps, and an oppositely extending upper tungsten filament clamp is provided on the upper tungsten filament clamp, the lower tungsten filament clamp and the upper tungsten filament clamp on the same side clamp one end of the tungsten filament heater, both ends of the tungsten filament heater are connected to a thermostat controller, and a thermocouple is provided outside the tungsten filament heater, which is in signal connection with the thermostat controller.

10. A method of welding with a welding device according to any one of claims 1 to 9, comprising:

step one, clamping the part to be welded through the clamping assembly,

and step three, starting the electric heating element to heat for welding.