An argon arc welding robot station

Abstract

The application relates to the technical field of welding robots, in particular to an argon arc welding robot workstation, which comprises a workstation base, a bottom plate clamping assembly, an argon arc welding robot arranged at the top left side of the workstation base, a movable working bottom plate slidably connected to the top right side in the workstation base, a welding bottom plate arranged at the top of the movable working bottom plate and a hemispherical shell, wherein the bottom plate clamping assembly comprises telescopic pressure cylinders fixedly connected to the top four corners of the welding bottom plate. In the application, the movable plate is pushed by the electric telescopic rod, the middle sponge block and the two elastic clamping plates are synchronously moved, the guide roller is attached to the outer wall of the hemispherical shell and slides downward along the curved surface to form an "eight" shaped semi-enclosed structure, the torsional spring provides clamping pre-tightening force, the elastic material absorbs welding stress, the convex block and the friction particles enhance the friction force, the air-permeable groove accelerates heat dissipation, the sponge block buffers vibration, the elastic plate disperses stress, and shell deformation caused by point contact is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding robots, in particular to an argon arc welding robot workstation. BACKGROUND

[0002] An argon arc welding robot workstation is an automatic welding system integrating industrial robots, TIG welding systems, precision tooling, sensing control and safety protection, and is designed to realize high-quality and high-stability inert gas shielded welding.

[0003] A welding robot workstation is disclosed in Chinese patent application No. CN201721180951.7. Although the application has the advantage of efficient and fully automatic welding, when in use, some special objects (such as steam boilers, LNG storage tanks, and high-pressure reaction kettles) cannot be effectively fixed by a general pressure cylinder during sealing cover welding due to the hemispherical shell on the upper side of the sealing cover and the flat surface on the lower side. First, the angle of the pressure cylinder clamp is different. Second, the outer side of the hemispherical shell is curved, making it difficult to provide effective clamping force when clamping the outer shell, thereby increasing the difficulty of welding the hemispherical shell with the flat surface and limiting the efficiency of welding. SUMMARY

[0004] The present application aims to provide an argon arc welding robot workstation to solve the problems raised in the background.

[0005] To solve the above technical problems, the present application provides the following technical solution: an argon arc welding robot workstation, comprising a workstation base, a bottom plate clamping assembly, an argon arc welding robot arranged on the top left side of the workstation base, a movable working bottom plate slidably connected to the top right side of the workstation base, a welding bottom plate and a hemispherical shell arranged on the top of the movable working bottom plate.

[0006] The bottom plate clamping assembly comprises:

[0007] A telescopic pressure cylinder is fixedly connected to the top four corners of the welding bottom plate. The telescopic pressure cylinder has a telescopic end, and the telescopic end of the telescopic pressure cylinder is fixedly connected with a lifting piece. The bottom of the lifting piece is fixedly connected with a hinged frame. A hinged plate is rotatably connected to the middle of the hinged frame. A pressure block is fixedly connected to the bottom of the hinged plate. A supporting spring one is fixedly connected to the side of the hinged plate close to the telescopic pressure cylinder. The end of the supporting spring one away from the hinged plate is fixedly connected to the bottom of the lifting piece. The supporting spring one can support the hinged plate. The pressure block is made of elastic material and can adaptively deform when it contacts the outer side of the hemispherical shell. The hinged plate can rotate in the middle of the hinged frame.

[0008] According to the technical scheme, the shell clamping assembly is composed of a fixed frame, an electric telescopic rod, a moving plate, a sponge block, a stress frame, an elastic clamping plate and a guide roller.

[0009] The fixed frame is fixedly connected to the front and rear sides of the top of the moving work base plate and is located in the middle of the moving work base plate; the electric telescopic rod is fixedly connected to the side of the fixed frame away from the moving work base plate; the electric telescopic rod has a telescopic end; the moving plate is fixedly connected to the telescopic end of the electric telescopic rod; the sponge block is fixedly connected to the other side of the moving plate; the stress frame is fixedly connected to the left and right sides of the moving plate; the elastic clamping plate is rotatably connected to the middle of the left and right sides of the stress frame through torsional springs; and the guide roller is rotatably connected to the side of the elastic clamping plate away from the stress frame.

[0010] According to the technical scheme, the auxiliary clamping assembly is composed of an extension frame, a limiting guide rod, a second supporting spring, a connecting block, a rotary connecting frame and a close-pressing plate.

[0011] The extension frame is fixedly connected to the top of the moving plate; the limiting guide rod is slidingly connected to the middle of the inner top of the extension frame; the second supporting spring is fixedly connected to the side of the extension frame close to the hemispherical shell and is located on the left and right sides of the limiting guide rod; the connecting block is fixedly connected to the end of the limiting guide rod away from the fixed frame; the rotary connecting frame is rotatably connected to the middle of the connecting block; and the close-pressing plate is fixedly connected to the other side of the rotary connecting frame, and the rotary connecting frame and the close-pressing plate can rotate in the middle of the connecting block.

[0012] According to the technical scheme, the telescopic end of the electric telescopic rod penetrates through the fixed frame and extends to the other side of the fixed frame and is fixedly connected to the moving plate; the electric telescopic rod can push the moving plate to move when working, so that the moving plate and the sponge block contact the outside of the hemispherical shell.

[0013] According to the technical scheme, the side of the elastic clamping plate close to the hemispherical shell is sequentially provided with a protruding block and friction particles from far to near; and the side of the elastic clamping plate close to the stress frame is provided with a front-and-rear-through air passage; the protruding block and the friction particles provided on the elastic clamping plate can effectively increase the friction force when the elastic clamping plate contacts the hemispherical shell.

[0014] According to the technical scheme, the fixed frame, the electric telescopic rod, the moving plate, the sponge block, the stress frame, the elastic clamping plate and the guide roller are provided with two groups; the two groups of fixed frames, electric telescopic rods, moving plates, sponge blocks, stress frames, elastic clamping plates and guide rollers are symmetrically distributed on the front and rear sides of the top of the moving work base plate; and the two groups of moving plates, sponge blocks and elastic clamping plates can effectively clamp the front lower side and the back lower side of the hemispherical shell.

[0015] According to the above technical scheme, the limit guide rod extends through the extension frame and the circular groove and extends to the other side of the fixed frame from the end of the connecting block away from the fixed frame, which can improve the stability of the limit guide rod and the fixed frame and the extension frame.

[0016] According to the above technical scheme, the second supporting spring is fixedly connected to the rotary connecting frame away from the extension frame, and the second supporting spring can provide a supporting force for the rotary connecting frame.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. Four groups of pressure blocks are annularly distributed on the top of the mobile working base plate, and the downward pressure is applied by the lifting member driven by the telescopic pressure cylinder. The pressure blocks realize multi-angle rotation through the hinged frame and the hinged plate, automatically adhere to the flat surface or arc surface of the base plate, the first supporting spring provides a reset elastic force, four-point synchronous clamping ensures uniform stress on the base plate, avoids local stress concentration caused by angle fixation of the traditional clamp, has self-adaptive curved surface capability, is compatible with flat and arc welding base plates, and improves clamping stability.

[0019] 2. The electric telescopic rod drives the moving plate, synchronously moves the middle sponge block and the elastic clamping plates on both sides, the guide roller adheres to the outer wall of the hemispherical shell and slides along the curved surface to form an "eight" shaped semi-enclosed structure, the torsional spring provides clamping pre-tightening force, the elastic material absorbs welding stress, the protrusions and friction particles enhance friction, the vent grooves accelerate heat dissipation, the sponge block buffers vibration, and the elastic plates disperse stress to avoid deformation of the shell caused by point contact.

[0020] 3. The moving plate synchronously drives the extension frame, drives the adhering and pressing plate through the connecting block and the rotary connecting frame, the second supporting spring provides downward elastic pressure, the pressing plate tightly adheres to the upper side of the shell, offsets the deformation of the upper part of the shell caused by bottom clamping, and guarantees the geometric precision after welding.

[0021] 4. The hinged structure of the pressure block, the elastic clamping plate and the guide roller are designed, so that the device can automatically adapt to flat and arc base plates and complex curved surfaces of the hemispherical shell, solve the problem of angle mismatching of the traditional clamp, disperse welding stress when clamping at the bottom, accelerate heat dissipation through the vent grooves, prevent local overheating deformation, provide controllable downward pressure through the second supporting spring when clamping at the top, suppress the upward deformation of the shell caused by bottom welding, reduce the displacement risk caused by welding vibration through the threefold buffering formed by the sponge block, the elastic plate surface contact and the annular four-point pressing plate, greatly improve the welding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, and do not constitute a limitation of the present application. In the drawings:

[0023] Figure 1 is the overall structure schematic diagram of the present application;

[0024] Figure 2 is the telescopic pressure cylinder schematic diagram of the present application;

[0025] Figure 3 is the support spring one schematic diagram of the present application;

[0026] Figure 4 is the welding bottom plate explosion schematic diagram of the present application;

[0027] Figure 5 is the fixed frame schematic diagram of the present application;

[0028] Figure 6 is the extension frame schematic diagram of the present application;

[0029] Figure 7 is the Figure 6 enlarged schematic diagram at A in the figure;

[0030] Figure 8 is the Figure 6 enlarged schematic diagram at B in the figure;

[0031] Figure 9 is the connection block explosion schematic diagram of the present application.

[0032] In the figure: 1, workstation base; 2, argon arc welding robot; 3, mobile working bottom plate; 4, welding bottom plate; 5, hemispherical shell; 6, bottom plate clamping assembly; 601, telescopic pressure cylinder; 602, lifting piece; 603, hinged frame; 604, hinged plate; 605, pressure block; 606, support spring one; 7, shell clamping assembly; 701, fixed frame; 702, electric telescopic rod; 703, moving plate; 704, sponge block; 705, force receiving frame; 706, elastic clamping plate; 707, guide roller; 8, auxiliary clamping assembly; 801, extension frame; 802, limit guide rod; 803, support spring two; 804, connection block; 805, rotating connection frame; 806, close pressing plate. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0034] Examples of the described embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0035] Embodiment one, please refer to Figures 1-3 The application provides the technical scheme: an argon arc welding robot workstation, comprising a workstation base 1, further comprising a bottom plate clamping assembly 6, the workstation base 1 top left side is provided with argon arc welding robot 2, the workstation base 1 inner top right side is slidably connected with mobile work bottom plate 3, the mobile work bottom plate 3 top is provided with welding bottom plate 4 and hemispherical shell 5.

[0036] Wherein, the bottom plate clamping assembly 6 comprises:

[0037] Telescopic pressure cylinder 601, fixedly connected to the top four corners of the welding bottom plate 4, the telescopic pressure cylinder 601 has a telescopic end, the telescopic pressure cylinder 601 telescopic end is fixedly connected with the lifting piece 602, the lifting piece 602 bottom is fixedly connected with the hinged frame 603, the hinged frame 603 middle part is rotatably connected with the hinged plate 604, the hinged plate 604 bottom is fixedly connected with the pressure block 605, the hinged plate 604 is fixedly connected with the support spring one 606 close to the telescopic pressure cylinder 601 side, the support spring one 606 far away from the hinged plate 604 one end and the lifting piece 602 bottom are fixedly connected, the support spring one 606 can support the hinged plate 604, the pressure block 605 is made of elastic material, can make the pressure block 605 contact the outside of the hemispherical shell 5 adaptive deformation, the hinged plate 604 can rotate in the middle part of the hinged frame 603.

[0038] When the welding bottom plate 4 and the hemispherical shell 5 need to be clamped and welded, the welding bottom plate 4 needs to be clamped and fixed in advance. Because the welding bottom plate 4 has two shapes of flat plate and arc, the conventional clamp is difficult to adapt to different clamping angle requirements, causing inconsistent stress direction, and thus reducing the clamping effect. When the welding bottom plate 4 is clamped, the welding bottom plate 4 is placed on the top of the movable working bottom plate 3 in advance, and then the telescopic pressure cylinder 601 is started to work. When the telescopic pressure cylinder 601 works, the telescopic pressure cylinder 601 drives the lifting piece 602 to descend. In the process of descending of the lifting piece 602, the hinged frame 603 at the bottom of the lifting piece 602 descends together, and the pressure block 605 at the bottom of the lifting piece 602 contacts the top of the welding bottom plate 4. Because the hinged plate 604 is arranged in a rotatable connection mode in the hinged frame 603, when the pressure block 605 contacts the top of the welding bottom plate 4, the pressure block 605 can rotate along the shape of the contact surface of the welding bottom plate 4, and the supporting spring one 606 can provide a certain reset force. The clamping force of the pressure block 605 on the welding bottom plate 4 is embodied in the extrusion force of the lifting piece 602 downward. The welding bottom plate 4 is fixed by using the pressure block 605 to extrude the contact part of the welding bottom plate 4. Because the pressure block 605 is arranged in four groups and is distributed in a ring shape on the top of the movable working bottom plate 3, the welding bottom plate 4 can be clamped from four directions at the same time, the stability and adhesion of the device when clamping the welding bottom plate 4 are improved, and the clamping effect is improved.

[0039] Embodiment two, please refer to Figures 4-8 On the basis of embodiment one, the technical scheme of the present application is provided: further comprising a shell clamping assembly 7, the shell clamping assembly 7 is composed of a fixed frame 701, an electric telescopic rod 702, a moving plate 703, a sponge block 704, a stress frame 705, an elastic clamping plate 706 and a guide roller 707.

[0040] The fixed frame 701 is fixedly connected to the top of the movable working bottom plate 3 on the front and back sides and is located at the middle part of the movable working bottom plate 3. The electric telescopic rod 702 is fixedly connected to the side away from the movable working bottom plate 3 of the fixed frame 701. The electric telescopic rod 702 has a telescopic end. The moving plate 703 is fixedly connected to the telescopic end of the electric telescopic rod 702. The sponge block 704 is fixedly connected to the other side of the moving plate 703. The stress frame 705 is fixedly connected to the left and right sides of the moving plate 703. The elastic clamping plate 706 is rotatably connected to the middle part of the left and right sides of the stress frame 705 through a torsional spring. The guide roller 707 is rotatably connected to the side away from the stress frame 705 of the elastic clamping plate 706. When the elastic clamping plate 706 rotates in the middle part of the stress frame 705, the supporting force is provided by the torsional spring.

[0041] The telescopic end of the electric telescopic rod 702 penetrates through the fixed frame 701 and extends to the other side of the fixed frame 701 and is fixedly connected with the moving plate 703. The electric telescopic rod 702 can push the moving plate 703 to move when working, so that the moving plate 703 and the sponge block 704 contact the outer side of the hemispherical shell 5.

[0042] The elastic clamping plate 706 is provided with a protrusion and a friction particle from far to near on the side close to the hemispherical shell 5. A gas permeation groove is arranged in the elastic clamping plate 706 and close to the stress frame 705. The protrusion and the friction particle arranged on the elastic clamping plate 706 can effectively increase the friction force when the elastic clamping plate 706 contacts the hemispherical shell 5.

[0043] The fixed frame 701, the electric telescopic rod 702, the moving plate 703, the sponge block 704, the stress frame 705, the elastic clamping plate 706 and the guide roller 707 are all provided with two groups. The two groups of the fixed frame 701, the electric telescopic rod 702, the moving plate 703, the sponge block 704, the stress frame 705, the elastic clamping plate 706 and the guide roller 707 are symmetrically distributed on the front and rear sides of the top of the moving working base plate 3. The two groups of the moving plate 703, the sponge block 704 and the elastic clamping plate 706 can effectively clamp the front lower side and the back lower side of the hemispherical shell 5.

[0044] After the welding base plate 4 is clamped and fixed, the hemispherical shell 5 needs to be placed on the top of the welding base plate 4 and positioned, so that the bottom edge of the hemispherical shell 5 coincides with the reserved opening on the top of the welding base plate 4, then the hemispherical shell 5 is clamped, and then the two are welded by the argon arc welding robot 2. At this time, the hemispherical shell 5 needs to be clamped, the electric telescopic rod 702 is controlled to work, and when the electric telescopic rod 702 works, the electric telescopic rod 702 can drive the moving plate 703 and the sponge block 704 to move. When the sponge block 704 moves, the sponge block 704 contacts the outer wall of the hemispherical shell 5. At the same time, in the moving process of the moving plate 703, the elastic clamping plates 706 on the outer side of the moving plate 703 move synchronously towards the hemispherical shell 5, so that the guide rollers 707 on the elastic clamping plates 706 contact the outer wall of the hemispherical shell 5 and can move downwards and outward along the outer wall of the hemispherical shell 5. Since the elastic clamping plates 706 are made of elastic material, the elastic clamping plates 706 can deform to a certain extent. At the same time, the elastic clamping plates 706 on both sides of the moving plate 703 can be "eight" opened compared with the sponge block 704 in the middle, and the elastic clamping plates 706 are attached to the outer wall of the hemispherical shell 5 (the clamping force is provided by the torsional spring arranged at the connection between the elastic clamping plate 706 and the force receiving frame 705), and the extension direction is obliquely downward. At this time, the elastic clamping plates 706 can provide a certain downward extrusion force to the hemispherical shell 5, and can clasp the outer side of the hemispherical shell 5, thereby improving the clamping effect and avoiding the decline of the clamping effect of the hemispherical shell 5 caused by point contact. At the same time, the elastic clamping plates 706 are surface clamping, which can effectively absorb the stress during welding. Since the front and rear sides of the hemispherical shell 5 are fixed by the sponge block 704 and the elastic clamping plates 706, vibration during welding can be avoided to a certain extent to prevent the hemispherical shell 5 from being displaced.

[0045] Embodiment three, please refer to Figures 6-9 On the basis of embodiment one, the technical scheme of the present application is provided: it further comprises an auxiliary clamping assembly 8, which is composed of an extension frame 801, a limiting guide rod 802, a supporting spring two 803, a connecting block 804, a rotating connecting frame 805 and a fitting pressing plate 806.

[0046] The extension frame 801 is fixedly connected to the top of the moving plate 703, the limiting guide rod 802 is slidingly connected to the inner top middle of the extension frame 801, the supporting spring two 803 is fixedly connected to one side of the extension frame 801 close to the hemispherical shell 5 and located on the left and right sides of the limiting guide rod 802, the connecting block 804 is fixedly connected to the end of the limiting guide rod 802 away from the fixed frame 701, the rotating connecting frame 805 is rotatably connected to the inner middle of the connecting block 804, and the fitting pressing plate 806 is fixedly connected to the other side of the rotating connecting frame 805. The rotating connecting frame 805 and the fitting pressing plate 806 can rotate in the inner middle of the connecting block 804.

[0047] The limit round groove is arranged in the inner top of the fixed frame 701, the limit guide rod 802 extends through the extension frame 801 and the round groove from one end of the connecting block 804 and extends to the other side of the fixed frame 701, which can improve the stability of the limit guide rod 802 and the fixed frame 701 and the extension frame 801.

[0048] The second supporting spring 803 is fixedly connected with the rotating connecting frame 805 from one end of the extension frame 801, and the second supporting spring 803 can provide a supporting force for the rotating connecting frame 805.

[0049] After clamping and fixing the lower side of the hemispherical shell 5, the upper side is not effectively fixed, which causes the stress generated by clamping and welding the bottom of the hemispherical shell 5 to easily cause the upper side of the hemispherical shell 5 to deform during welding of the hemispherical shell 5, thereby reducing the quality of the finished product after welding. Therefore, a certain clamping force needs to be provided to the upper side of the hemispherical shell 5, and the electric telescopic rod 702 is controlled to work, so that when the electric telescopic rod 702 pushes the moving plate 703 to move, the extension frame 801 on the moving plate 703 can move synchronously. During the movement of the extension frame 801, the fitting pressing plate 806 is fitted on the upper side of the hemispherical shell 5, and because the connecting block 804 is rotationally connected with the rotating connecting frame 805, the fitting pressing plate 806 can be fitted with the outer side of the hemispherical shell 5 when it contacts the upper side of the outer side of the hemispherical shell 5. The fitting pressing plate 806 can provide downward extrusion force to the upper side of the outer side of the hemispherical shell 5 through the support of the second supporting spring 803, thereby clamping the upper side of the outer side of the hemispherical shell 5 and ensuring the quality of the hemispherical shell 5 during clamping.

[0050] The protrusions and the friction particles arranged on the elastic clamping plate 706 can improve the friction force when the elastic clamping plate 706 clamps the outer side of the hemispherical shell 5, thereby improving the clamping effect. Compared with the traditional clamping mechanism, the air vent groove arranged on the elastic clamping plate 706 can effectively improve the heat dissipation effect during welding of the device, because the heat at the welding position is transmitted to the elastic clamping plate 706 through the hemispherical shell 5 and the heat generated by the elastic clamping plate 706 can be dissipated through the air vent groove on the elastic clamping plate 706.

[0051] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0052] Finally, it should be noted that the above-mentioned only constitutes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, equivalent replacements, improvements and the like of the technical solutions described in the foregoing embodiments can still be made. Any modifications, equivalent replacements, improvements and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An argon arc welding robot workstation, comprising a workstation base (1), characterized in that: It also includes a base plate clamping assembly (6), an argon arc welding robot (2) is provided on the top left side of the workstation base (1), a movable working base plate (3) is slidably connected to the top right side of the workstation base (1), and a welding base plate (4) and a hemispherical shell (5) are provided on the top of the movable working base plate (3). The base plate clamping assembly (6) includes: A telescopic pressure cylinder (601) is fixedly connected to the top four corners of the welded base plate (4). The telescopic pressure cylinder (601) has a telescopic end. A lifting component (602) is fixedly connected to the telescopic end of the telescopic pressure cylinder (601). A hinge frame (603) is fixedly connected to the bottom of the lifting component (602). A hinge plate (604) is rotatably connected to the middle of the hinge frame (603). A pressure block (605) is fixedly connected to the bottom of the hinge plate (604). The hinge plate (604) is close to the telescopic pressure cylinder. A support spring (606) is fixedly connected to one side of the cylinder (601). The end of the support spring (606) away from the hinge plate (604) is fixedly connected to the bottom of the lifting component (602). The support spring (606) can support the hinge plate (604). The pressure block (605) is made of elastic material, which can make the pressure block (605) adapt to the deformation when it contacts the outside of the hemispherical shell (5). The hinge plate (604) can rotate in the middle of the hinge frame (603). It also includes a housing clamping assembly (7), which is composed of a fixed frame (701), an electric telescopic rod (702), a movable plate (703), a sponge block (704), a force-bearing frame (705), an elastic clamping plate (706), and a guide roller (707); The fixed frame (701) is fixedly connected to the front and rear sides of the top of the movable working base plate (3) and is located in the middle of the movable working base plate (3). The electric telescopic rod (702) is fixedly connected to the fixed frame (701) on the side away from the movable working base plate (3). The electric telescopic rod (702) has a telescopic end. The movable plate (703) is fixedly connected to the telescopic end of the electric telescopic rod (702). The sponge block (704) is fixedly connected to the other side of the movable plate (703). The force-bearing frame (705) is fixedly connected to the left and right sides of the movable plate (703). The elastic clamping plate (706) is rotatably connected to the middle of the left and right sides of the force-bearing frame (705) through a torsion spring. The guide roller (707) is rotatably connected to the side of the elastic clamping plate (706) away from the force-bearing frame (705). When the elastic clamping plate (706) rotates in the middle of the force-bearing frame (705), it provides support force through the torsion spring. It also includes an auxiliary clamping assembly (8), which consists of an extension frame (801), a limiting guide rod (802), a second support spring (803), a connecting block (804), a rotating connecting frame (805), and a fitting pressure plate (806); The extension frame (801) is fixedly connected to the top of the movable plate (703). The limiting guide rod (802) is slidably connected to the middle of the top of the extension frame (801). The second support spring (803) is fixedly connected to the side of the extension frame (801) near the hemispherical shell (5) and located on the left and right sides of the limiting guide rod (802). The connecting block (804) is fixedly connected to the end of the limiting guide rod (802) away from the fixed frame (701). The rotating connecting frame (805) is rotatably connected to the middle of the connecting block (804). The fitting pressure plate (806) is fixedly connected to the other side of the rotating connecting frame (805). The rotating connecting frame (805) and the fitting pressure plate (806) can rotate in the middle of the connecting block (804).

2. The argon arc welding robot workstation according to claim 1, characterized in that: The telescopic end of the electric telescopic rod (702) passes through the fixed frame (701) and extends to the other side of the fixed frame (701) and is fixedly connected to the movable plate (703). When the electric telescopic rod (702) is working, it can push the movable plate (703) to move, so that the movable plate (703) and the sponge block (704) contact the outside of the hemispherical shell (5).

3. The argon arc welding robot workstation according to claim 2, characterized in that: The elastic clamping plate (706) is provided with protrusions and friction particles in sequence from far to near on the side near the hemispherical shell (5). The elastic clamping plate (706) is provided with a through-hole ventilation groove on the side near the force frame (705). The protrusions and friction particles provided on the elastic clamping plate (706) can effectively increase the friction force when the elastic clamping plate (706) contacts the hemispherical shell (5).

4. The argon arc welding robot workstation according to claim 3, characterized in that: The fixed frame (701), electric telescopic rod (702), moving plate (703), sponge block (704), force-bearing frame (705), elastic clamping plate (706) and guide roller (707) are all provided in two sets. The two sets of fixed frame (701), electric telescopic rod (702), moving plate (703), sponge block (704), force-bearing frame (705), elastic clamping plate (706) and guide roller (707) are symmetrically distributed on the front and rear sides of the top of the movable working base plate (3). By setting two sets of moving plate (703), sponge block (704) and elastic clamping plate (706), the lower front side and the lower back side of the hemispherical shell (5) can be effectively clamped.

5. The argon arc welding robot workstation according to claim 4, characterized in that: A limiting groove is provided at the top of the fixed frame (701). The end of the limiting guide rod (802) away from the connecting block (804) passes through the extension frame (801) and the groove and extends to the other side of the fixed frame (701), which can improve the stability of the limiting guide rod (802) with the fixed frame (701) and the extension frame (801).

6. The argon arc welding robot workstation according to claim 5, characterized in that: The second support spring (803) is fixedly connected to the rotating connecting frame (805) at the end away from the extension frame (801), and the second support spring (803) can provide support force to the rotating connecting frame (805).

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