CN113385802A

CN113385802A - Welding device for funnel-shaped thin-walled part and using method thereof

Info

Publication number: CN113385802A
Application number: CN202110555086.4A
Authority: CN
Inventors: 李胜波; 刘许勋; 莫靖宇; 白凤民; 吉尼斯.舒金
Original assignee: Xiamen University of Technology
Current assignee: Hebei Zhicheng Shuyuan Technology Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-09-14
Anticipated expiration: 2041-05-21
Also published as: CN113385802B

Abstract

The invention provides a welding device for a funnel-shaped thin-walled part and a using method thereof, which relate to the technical field of welding and comprise the following steps: the clamping assembly is used for clamping the workpiece to be machined so as to enable the welding seams of the workpiece to be machined to be in butt joint order; the supporting component is used for supporting the inner wall of the workpiece, can drive the workpiece to rotate and is configured to be switched between an expansion state and a contraction state through the driving piece; when the supporting component is in an expanded state, the workpiece rotates along with the supporting component, and when the supporting component is in a contracted state, the workpiece can be pulled out of the supporting component; a welding assembly to weld along a weld; and the control assembly is electrically connected with the clamping assembly, the supporting assembly and the welding assembly. Through the cooperation between each subassembly, effectively avoided welding stress deformation, clamping and the difficult scheduling problem of dismantling that arouses among the large-scale thin wall spare welding process, improved welding efficiency and welding quality.

Description

Welding device for funnel-shaped thin-walled part and using method thereof

Technical Field

The invention relates to the technical field of welding, in particular to a welding device for a funnel-shaped thin-walled part and a using method thereof.

Background

The large thin-wall part has the advantages of light weight, strong integrity, strong shape plasticity and the like, and is widely applied. With the rapid development of the aerospace industry in China, cylindrical thin-wall components with high performance and large thickness-diameter ratio are more and more widely applied, such as a funnel-shaped spraying device at the tail of a rocket launching device, which is made of high-temperature-resistant refractory metal materials, and are generally welded by electron beams, as shown in fig. 1 and 2. However, the challenges in machining large thin-walled parts are mainly focused on the following:

the rigidity of the thin-wall part is poor, the deformation is easy to occur in the machining process, the size precision and the shape precision of the workpiece are difficult to guarantee, and the method is particularly more prominent in the machining of large variable-radius thin-wall parts.

The thin-wall part has extremely strict requirements on a clamping process in the welding process, the stress clamping caused by the clamp is required to be reduced or reduced in the clamping process, otherwise, the clamping stress deformation is easily caused, and the part is easily rebounded naturally when the clamp is removed, so that the unrepairable quality problem of the part is caused.

The cavity type thin-wall parts are different in shape, regular cylinders, variable-radius funnels and special-shaped thin-wall parts are high in requirements on clamping fixtures in the cavity for the special-shaped thin-wall parts, and on one hand, stress-free clamping is required, and on the other hand, the clamping is required to be easy to disassemble after the thin-wall parts are machined.

For the funnel-shaped thin-walled part, the traditional welding mode is multi-person cooperative operation, firstly two persons align the welding seam of the funnel-shaped thin-walled part, then another person carries out manual spot welding, the requirement on the welding experience of workers is extremely high, the whole welding process is complex to operate, the efficiency is low, the process repeatability is poor, and the welding seam quality is unstable. In addition, according to the shape of the cavity of the funnel-type thin-wall part, a clamping piece arranged in the cavity is preset, then the thin-wall part is manually attached to the clamping surface forcibly, finally, a welding seam is welded, after the welding is completed, the clamp in the cavity of the thin-wall part needs to be knocked out forcibly, deformation after welding is easy to occur in the whole process, the workpiece is often difficult to disassemble, the shape of the workpiece is changed due to the existence of clamping stress after the workpiece is welded, more serious, if the stress is too large, the welding seam is easy to tear or break, and the yield is low.

Generally, the welding process difficulty of the large thin-wall part is as follows: the fixture is difficult to assemble and disassemble, so that the workpiece is deformed after being welded.

Disclosure of Invention

The invention discloses a welding device for a funnel-shaped thin-walled part and a using method thereof, aiming at solving the problem that the workpiece deforms after welding due to the fact that the existing welding fixture is difficult to assemble and disassemble.

The invention adopts the following scheme:

a welding device for funnel-shaped thin-walled parts, comprising:

the clamping assembly is used for clamping the workpiece to be machined so as to enable the welding seams of the workpiece to be machined to be in butt joint order;

the supporting component is used for supporting the inner wall of the workpiece, can drive the workpiece to rotate and is configured to be switched between an expansion state and a contraction state through the driving piece; when the supporting component is in an expanded state, the workpiece rotates along with the supporting component, and when the supporting component is in a contracted state, the workpiece can be pulled out of the supporting component;

a welding assembly to weld along a weld;

and the control assembly is electrically connected with the clamping assembly, the supporting assembly and the welding assembly.

As a further improvement, the clamping device further comprises a base, wherein a guide rail for moving the clamping assembly is arranged on the base, the clamping assembly is provided with a first clamping piece and a second clamping piece which are arranged oppositely, the first clamping piece and the second clamping piece are both in adaptive connection with the guide rail, and when the control assembly drives the clamping assembly to clamp a workpiece, the first clamping piece and the second clamping piece move oppositely along the guide rail.

As a further improvement, the first clamping piece and the second clamping piece are both provided with a moving part and a rotating part, the moving part is in adaptive connection with the guide rail, and the rotating part is used for driving the workpiece to rotate.

As a further improvement, the supporting component is in an umbrella shape and is provided with three groups of supporting pieces which are respectively used for supporting the head part, the tail part and the middle part of the workpiece, so that the supporting force of the workpiece in the welding process is uniform.

As a further improvement, the support assembly further comprises a movable rod and a fixed rod, and each group of support pieces is provided with a main support rod and an auxiliary support rod;

one end of the main supporting rod is hinged with the fixed sleeve, and the other end of the main supporting rod is provided with a butting block;

one end of the auxiliary supporting rod is hinged with the movable sleeve, and the other end of the auxiliary supporting rod is hinged with the main supporting rod;

at least one movable sleeve is arranged on the movable rod, and when the movable sleeve moves along with the movable rod in the direction away from the main support rod, the support assembly is in an unfolded state; or when the moving rod drives the moving sleeve to move along the direction close to the main support rod, the support assembly is in a contraction state.

As a further improvement, the device also comprises an adjusting piece used for adjusting the movement of the moving rod and a connecting rod used for enabling each group of supporting pieces to be linked, wherein the connecting rod is connected with each moving sleeve so that each moving sleeve can move synchronously.

As a further improvement, the welding assembly and the driving member are disposed on different sides, and the driving member includes a first driving member for driving the supporting assembly to rotate along a first direction, and a second driving member for driving the supporting assembly to rotate along a second direction.

As a further improvement, the first supporting piece close to the large end of the workpiece is provided with a pressing piece used for pressing the outer wall of the workpiece, so that the workpiece can rotate along the second direction along with the supporting assembly.

As a further improvement, the welding assembly is provided with a welding seam pinch roller and an elastic piece matched with the welding seam pinch roller so as to realize stable welding when the welding assembly is welded to a slope surface of a workpiece.

The use method of the welding device for the funnel-shaped thin-wall part comprises the following steps:

s1, placing the workpiece to be processed on the clamping component;

s2, driving the clamping assembly through the control assembly to align the welding seam of the workpiece to be processed;

s21: adjusting the welding assembly into pulse beam current, and performing spot welding on a welding seam;

s3: the control component drives the supporting component to be in an unfolded state so as to support the inner wall of the workpiece to be processed;

s31: the clamping assembly loosens the workpiece, and the supporting assembly drives the workpiece to rotate to the welding line on the other side for spot welding;

s4: adjusting the electron beam to be continuous beam current, and starting seam welding; after welding the welding seam on one side, repeating the step S31, and rotating to the other side;

s5: and after the welding is finished, the control assembly drives the supporting assembly to be in a contraction state so as to take down the processed workpiece from the supporting assembly.

By adopting the technical scheme, the invention can obtain the following technical effects:

the utility model provides a welding set for infundibulate thin wall spare makes the welding seam butt joint of waiting to process the work piece neat through the centre gripping subassembly, and supporting component has expansion and two kinds of states of shrink, realizes that the work piece supports the work piece inner wall when the welding, contracts after the welding is accomplished to make the work piece can follow support piece and take off. Thereby make the work piece install and remove the convenience during welding, need not deviate from the support through artifical striking to solve the problem that exists among the prior art, effectively improve welding quality and welding efficiency. The advantages of the present application are apparent in comparison to the prior art.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a workpiece (before welding) according to one embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the workpiece of FIG. 1 after welding is completed;

FIG. 3 is a schematic structural diagram of a welding device for funnel-shaped thin-walled parts according to one embodiment of the invention;

FIG. 4 is an enlarged view of A in FIG. 3;

FIG. 5 is a schematic view of a workpiece disposed in a clamping assembly according to one embodiment of the present invention;

FIG. 6 is a schematic view of a workpiece rotating with the clamping assembly in accordance with one embodiment of the present invention;

FIG. 7 is a schematic view of the clamping assembly after releasing a workpiece in accordance with one embodiment of the present invention;

FIG. 8 is an enlarged view of B of FIG. 7;

FIG. 9 is a schematic view of the support assembly in an upright position according to one embodiment of the present invention;

FIG. 10 is a schematic view of the structure of FIG. 9 from another perspective;

FIG. 11 is an enlarged view of a portion of a welded assembly in accordance with an embodiment of the present invention;

FIG. 12 is a schematic structural view of a support assembly according to one embodiment of the present invention;

FIG. 13 is a schematic structural view of a support member according to one embodiment of the present invention;

FIG. 14 is a schematic structural view of a mobile sleeve according to one embodiment of the present invention;

fig. 15 is a schematic structural view of the pouch according to one embodiment of the present invention;

FIG. 16 is a schematic structural diagram of a secondary support rod according to an embodiment of the present invention;

FIG. 17 is a partial cross-sectional view of an adjustment member coupled to a travel bar according to one embodiment of the present invention.

Icon: 100-a clamping assembly; 110-a first clamp; 111-a moving part; 112-a rotating part; 120-a second clamp; 200-a support assembly; 210-a driver; 220-a support; 221-main support bar; 222-a secondary support bar; 223-moving the sleeve; 224-a fixation sleeve; 225-a compression sheet; 230-a travel bar; 240-fixing rod; 250-an adjustment member; 260-connecting rod; 300-welding the assembly; 310-weld pinch roller; 320-an elastic member; 330-a mechanical arm; 400-a workpiece; 500-a base; 510-guide rail.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

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.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. 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.

Examples

With reference to fig. 1 to 17, the present embodiment provides a welding apparatus for a funnel-shaped thin-walled member, including a clamping assembly 100, a supporting assembly 200, a welding assembly 300, and a control assembly (not shown), wherein the clamping assembly 100 is configured to clamp a workpiece 400 to be processed, so that a weld of the workpiece 400 to be processed is butt-jointed; the supporting assembly 200 is used for supporting the inner wall of the workpiece 400, can drive the workpiece 400 to rotate, and is configured to be switched between an expanded state and a contracted state through the driving piece 210; when the support assembly 200 is in the expanded state, the workpiece 400 is enabled to rotate along with the support assembly 200, and when the support assembly 200 is in the contracted state, the workpiece 400 can be pulled out of the support assembly 200; the welding assembly 300 is configured to weld along a weld; the control assembly is electrically connected with the clamping assembly 100, the supporting assembly 200 and the welding assembly 300, so that each assembly is driven by the control assembly, semi-automation or full automation is realized, manual operation is reduced, the quality of a welding seam is ensured, and the welding precision is improved.

In the present embodiment, the clamping assembly 100 makes the welds of the workpiece 400 to be processed butt in order, and the supporting assembly 200 has two states of expansion and contraction, so that the workpiece 400 supports the inner wall of the workpiece 400 during welding and contracts after welding is completed, so that the workpiece 400 can be removed from the support 220. Therefore, the workpiece 400 is convenient to assemble and disassemble during welding, and does not need to be knocked manually to be separated from the support, so that the problems in the prior art are solved.

In a preferred embodiment, the clamping device further comprises a base 500, a guide rail 510 for moving the clamping assembly 100 is provided on the base 500, the clamping assembly 100 has a first clamping member 110 and a second clamping member 120 which are oppositely disposed, the first clamping member 110 and the second clamping member 120 are both connected with the guide rail 510 in a matching manner, and when the control assembly drives the clamping assembly 100 to clamp the workpiece 400, the first clamping member 110 and the second clamping member 120 move along the guide rail 510. Specifically, the first clamping member 110 and the second clamping member 120 are both provided with a moving portion 111 and a rotating portion 112, the moving portion 111 is connected with the guide rail 510 in a matching manner, and the rotating portion 112 is used for driving the workpiece 400 to rotate. For example, the workpiece 400 has two symmetrical half funnel shapes, and before welding, the opening of the workpiece 400 is first turned upward and placed on the first clamping member 110 and the second clamping member 120, respectively. Under the driving of the control component, the rotating portion 112 drives the workpiece 400 to rotate, so that the openings of the workpiece 400 are opposite, and the workpiece 400 is moved to the welding seam splicing direction through the moving portion 111.

In an alternative embodiment of the present invention based on the above embodiment, referring to fig. 12, the supporting member 200 has an umbrella shape and has three sets of supporting members 220 for supporting the head, tail and middle portions of the workpiece 400 respectively, so as to make the supporting force of the workpiece 400 uniform during the welding process. Without being limited thereto, in other embodiments, one, two, four or more sets of the supporting members 220 may be provided. It is noted that the maximum diameter of each set of support members 220 is less than or equal to the diameter of the inner wall of the workpiece 400 at the support location. In this embodiment, the workpiece 400 has a large diameter end as the head.

Preferably, the support assembly 200 further comprises a moving bar 230 and a fixing bar 240, and each set of the supporting members 220 is provided with a main supporting bar 221 and a sub supporting bar 222. One end of the main supporting rod 221 is hinged with the fixing sleeve 224, and the other end is provided with a butting block; one end of the auxiliary support bar 222 is hinged to the movable sleeve 223, and the other end is hinged to the main support bar. Wherein at least one movable sleeve 223 is disposed on the movable rod 230, and the support assembly 200 is in an unfolded state when the movable sleeve 223 moves along with the movable rod 230 in a direction away from the main support rod 221; alternatively, the support assembly 200 is in a contracted state when the moving bar 230 moves the moving sleeve 223 in a direction close to the main support bar 221.

Further, an adjusting member 250 (e.g., an adjusting nut) for adjusting the movement of the moving rod 230, and a connecting rod 260 for linking the sets of supporting members 220, are further included, and the connecting rod 260 is connected to the moving sleeves 223 so that the moving sleeves 223 can be moved synchronously. For example, the movable sleeve 223 at the head end is disposed on the movable rod 230, and the rest of the movable sleeves 223 are all sleeved on the fixed rod 240 and can move along the fixed rod 240 under the action of the connecting rod 260. The movable rod 230 is connected with the fixed rod 240 through a screw thread, and the adjusting member 250 which is connected with the movable rod 230 in a matching way is rotated, so that the movable rod 230 moves along the axis thereof, thereby driving the movable sleeve 223 at the head end to move along with the movable rod 230, and the movable sleeve 223 is fixedly connected with the connecting rod 260, thereby driving other movable sleeves 223 to move synchronously. It should be noted that, in the present embodiment, the main support rods 221 are inwardly contracted during the process of decreasing the distance between the moving sleeve 223 and the fixed sleeve 224, and the auxiliary support rods 222 stretch the main support rods 221 to be outwardly expanded during the process of increasing the distance between the moving sleeve 223 and the fixed sleeve 224.

In addition to the above embodiments, in an alternative embodiment of the present invention, the welding assembly 300 and the driving member 210 are disposed on different sides, and the driving member 210 includes a first driving member for driving the supporting assembly 200 to rotate along a first direction and a second driving member for driving the supporting assembly to rotate along a second direction. In this embodiment, the first direction is a horizontal direction, and the second direction is a vertical direction, that is, the supporting assembly 200 can rotate around the axis along the horizontal direction to drive the workpiece 400 to rotate from one side weld to the other side weld, so as to facilitate welding of the workpiece 400. The supporting component 200 can also rotate around the second driving piece along the second direction, for example, the supporting component 220 rotates from the horizontal position to the vertical position, when the workpiece 400 is to be processed, the supporting component 200 rotates to the horizontal position to support and drive the workpiece 400 to rotate along the horizontal direction, after the workpiece 400 is processed, the supporting component 200 rotates to the vertical position, the corresponding workpiece 400 rotates to the vertical state along with the supporting component 200, the large end of the workpiece 400 is close to the ground, when the supporting component 220 contracts, the workpiece 400 falls onto a forklift for bearing the workpiece 400 under the action of gravity, and automatic unloading is achieved.

In one embodiment, the head support 220 near the large end of the workpiece 400 is provided with a pressing tab 225 for pressing against the outer wall of the workpiece 400 to enable the workpiece 400 to rotate with the support assembly 200 in the second direction. In one embodiment, the compression tab 225 is adjusted by a screw to bring the compression tab 225 into close proximity with the outer wall of the workpiece 400. Preferably, the supporting members 220 at the front and rear ends are provided with pressing pieces 225 to smoothly rotate the workpiece 400, but not limited thereto. It should be noted that, in this embodiment, after the weld of the workpiece 400 is aligned, the weld on the side close to the electronic welding gun is spot-welded, and then the pressing sheet 225 is used to press the workpiece, which is beneficial to the rotation of the workpiece 400 and can prevent the deformation of the workpiece 400 after the clamping assembly 100 is loosened.

Based on the above embodiments, in an alternative embodiment of the present invention, the welding assembly 300 has the weld pressing wheel 310 and the elastic member 320 (e.g., a spring) for cooperating with the weld pressing wheel 310, so as to ensure the smoothness of the weld during welding, and the weld is subjected to a transverse force when being welded to the slope of the workpiece 400, and the transverse force is offset by the elasticity of the elastic member 320, so as to stabilize the welding. In this embodiment, the welding assembly 300 further includes a mechanical arm 330, and the position of the electronic welding torch is adaptively adjusted by the mechanical arm 330, so as to ensure the welding accuracy. It should be noted that, in this embodiment, the problems of uneven weld surface and unstable weld quality are solved by the cooperation of the weld pressing wheel 310 and the electron beam welding gun, and the relative perpendicularity of the welding beam and the welding surface can be ensured all the time by adjusting the elastic member 320, so that the welding requirements of horizontal welding, welding with different gradients and the combination of the horizontal welding and the welding with different gradients can be met, and the welding efficiency is effectively improved.

Another embodiment provides a method of using a welding device for funnel-shaped thin-walled parts as described above, comprising the steps of:

s1, placing the workpiece 400 to be processed on the clamping assembly 100;

s2, driving the clamping assembly 100 through the control assembly to align the welding seam of the workpiece 400 to be processed;

s21: adjusting the welding assembly 300 into pulse beam current, and performing spot welding on a welding seam;

s3: the control component drives the supporting component 200 to be in an unfolded state so as to support the inner wall of the workpiece 400 to be processed;

s31: the clamping assembly 100 loosens the workpiece 400, and the support assembly 200 drives the workpiece 400 to rotate to the other side of the welding line for spot welding;

s5: upon completion of the weld, the control assembly actuates the support assembly 200 into a retracted state to remove the finished workpiece 400 from the support assembly 200.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention.

Claims

1. A welding device for funnel-shaped thin-walled parts, comprising:

a welding assembly to weld along a weld;

2. The welding device for the funnel-shaped thin-walled member according to claim 1, further comprising a base, wherein a guide rail for the clamping assembly to move is provided on the base, the clamping assembly has a first clamping member and a second clamping member which are oppositely disposed, the first clamping member and the second clamping member are both in adaptive connection with the guide rail, and when the control assembly drives the clamping assembly to clamp the workpiece, the first clamping member and the second clamping member move along the guide rail in opposite directions.

3. The welding device for the funnel-shaped thin-walled member according to claim 2, wherein the first clamping member and the second clamping member are provided with a moving portion and a rotating portion, the moving portion is connected with the guide rail in a matched manner, and the rotating portion is used for driving a workpiece to rotate.

4. The welding device for the funnel-shaped thin-walled part according to claim 1, wherein the support assembly is umbrella-shaped and has three sets of support members for supporting the head, tail and middle of the workpiece respectively so as to make the supporting force of the workpiece uniform during the welding process.

5. Welding apparatus for a funnel-shaped thin wall part according to claim 4, wherein the support assembly further comprises a moving bar and a fixed bar, and each set of support members is provided with a primary support bar and a secondary support bar;

6. The welding device for the funnel-shaped thin-wall part according to claim 5, further comprising an adjusting member for adjusting the movement of the moving rod, and a connecting rod for linking the sets of supporting members, wherein the connecting rod is connected with the moving sleeves so that the moving sleeves can be moved synchronously.

7. The welding device for the funnel-shaped thin-walled part according to claim 6, wherein the welding assembly and the driving member are disposed at different sides, and the driving member comprises a first driving member for driving the support assembly to rotate in a first direction and a second driving member for driving the support assembly to rotate in a second direction.

8. Welding device for a funnel-shaped thin-walled part according to claim 7, characterized in that the primary support near the large end of the work piece is provided with a pressing tab for pressing the outer wall of the work piece so that the work piece can rotate with the support assembly in the second direction.

9. The welding device for the funnel-shaped thin-walled part according to claim 1, wherein the welding assembly has a weld pinch roller and an elastic member for cooperating with the weld pinch roller to stabilize the welding when welding to the slope of the workpiece.

10. Use of the welding device for funnel-shaped thin-walled parts according to any of claims 1 to 9, characterized by the following steps:

s1, placing the workpiece to be processed on the clamping assembly;

s5: and after welding is finished, the control component drives the supporting component to be in a contraction state so as to take down the processed workpiece from the supporting component.