Laser welding technology for flange diaphragm of pressure transmitter

Abstract

The present invention discloses a laser welding process for a pressure transmitter flange diaphragm, and relates to the technical field of laser welding of pressure transmitter diaphragms. The specific steps are as follows: Step 1: Clean the surface of the flange body and the diaphragm; Step 2: Connect the flange body and the diaphragm; Step 3: Perform multiple-turn welding operations on the flange body and the diaphragm through welding equipment. The present invention improves the welding fixture in the process, which can quickly absorb excess welding heat, help the weld to dissipate heat, and inhibit the generation of wave deformation; in order to keep the opening position of the positioning ring always below the laser, avoid the positioning ring from shifting, and affect the welding effect of the flange body and the diaphragm, the applicant also specially designed a welding device, which is convenient for multiple-turn welding operations between the flange body and the diaphragm by setting a clamping mechanism and a limiting mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding of pressure transmitter diaphragms, in particular to a laser welding process of a flange diaphragm of a pressure transmitter. Background Art

[0002] The flange type pressure transmitter has the characteristics of small and compact structure, good moisture resistance and excellent media compatibility. Its pressure sensitive element is a stainless steel diaphragm with a thickness of only 0.06mm and a general diameter of about 40-60mm. The diaphragm is fixed on the flange body to form an automatic sensing and monitoring system for the pressure of the pressure transmitter. In the prior art, the diaphragm was fixed on the flange body by special glue bonding or argon arc welding, but the flatness and sealing effect could not meet the use requirements well; some technologies also use plasma arc welding, but in actual operation, it is difficult to fuse the diaphragm, and the aesthetics of the weld after welding is poor, which is specifically manifested in the oxidation and yellowing of the weld, the inconsistency of the width and height of the weld.

[0003] At present, the best fixing method is laser welding. After welding, the finished product not only has beautiful welds but also has good sealing effects. However, due to the strict requirements on the matching tolerance between the diaphragm and the flange body during welding, the welding speed, welding direction, and the relative position of the welding gun need to be controlled with high quality during the welding process, which also puts forward high requirements on the technical quality of the operator.

[0004] In view of this, in order to facilitate the welding of the flange body and the diaphragm, a pressure transmitter flange diaphragm laser welding process is provided. Summary of the invention

[0005] The purpose of the present invention is to provide a laser welding process for the flange diaphragm of a pressure transmitter in order to facilitate the welding of the flange body and the diaphragm.

[0006] To achieve the above object, the present invention provides the following technical solution: a laser welding process for a pressure transmitter flange diaphragm, the specific steps are as follows:

[0007] Step 1: Clean the surface of the flange and diaphragm;

[0008] Step 2: Connect the flange body and the diaphragm, place the diaphragm on the top of the flange body, press the diaphragm with a pressing block, and position the pressing block with a positioning ring;

[0009] Step 3: Welding: Place the flange body on the welding equipment, and the welding equipment performs multiple-circle welding operations on the flange body and the diaphragm;

[0010] The welding equipment used in the step three includes a base, a movable groove is provided at the top of the base, a movable seat is slidably connected to the inner wall of the movable groove, the top of the base is located at one end of the movable groove and is fixedly connected to a mounting frame, a laser emitter is installed on the outer wall of the mounting frame, the flange body and the positioning ring are fixed to the movable seat by a clamping mechanism, the position of the positioning ring is limited by a limiting mechanism, the clamping mechanism includes a first motor, the first motor is installed on the outer wall of the base, the output end of the first motor is connected to a first threaded rod running through the movable seat, the bottom end of the movable seat is symmetrically provided with transverse grooves, the inner wall of the movable groove is symmetrically fixedly connected with transverse plates, a rotating motor is installed inside the movable seat, and the output end of the rotating motor is connected to a rotating seat.

[0011] As a further solution of the present invention: the clamping mechanism also includes a displacement groove opened at the top of the movable seat, the displacement groove is slidably connected to a displacement frame, a second motor is installed inside the movable seat, an output end of the second motor is connected to a second threaded rod, the second threaded rod extends to the interior of the displacement frame, one end of the displacement frame is fixedly connected to a connecting seat, the bottom end of the connecting seat is rotatably connected to a rotating column, the movable seat is slidably connected to an extrusion plate extending to the inner cavity of the transverse groove, a first spring is connected between the extrusion plate and the movable seat, and the outer wall of the extrusion plate is fixedly connected to a clamping frame extending to both sides of the rotating seat.

[0012] As a further solution of the present invention: the limiting mechanism includes a limiting plate, the limiting plate is rotatably connected to an outer wall of one side of the connecting seat, the outer wall of the limiting plate is provided with a fixing groove, the interior of the connecting seat is slidably connected with a fixing frame, the bottom end of the fixing frame extends to the inner cavity of the fixing groove, a second spring is connected between the fixing frame and the connecting seat, the interior of the displacement frame is located at the top of the fixing frame and is rotatably connected with a spur gear, the interior of the displacement frame is located at the top of the spur gear and is slidably connected with a connecting frame, the connecting frame extends out of the displacement frame, a groove is provided on one side of the inner wall of the displacement groove, and the The movable seat is internally slidably connected to a pushing frame, the top end of the pushing frame extends to the inner cavity of the groove, the bottom end of the pushing frame extends to the inner cavity of the transverse groove, one side of the limit plate is fixedly connected to a connecting rod, the top end of the movable seat is located on one side of the rotating seat and is fixedly connected to a side plate, the outer wall of the side plate is provided with a connecting groove, the top end of the connecting groove is provided with an oblique groove, the top end of the oblique groove is provided with a vertical groove, one end of the connecting rod is located in the vertical groove, the limit plate is rotatably connected to the connecting seat through a connecting shaft, the outer wall of the connecting shaft is provided with a torsion spring, and the two ends of the torsion spring are respectively connected to the limit plate and the connecting seat.

[0013] As a further solution of the present invention: the inner wall of the movable groove is in contact with the outer wall of the movable seat, the outer wall of the movable seat is provided with a first threaded hole, and the first threaded hole matches the first threaded rod.

[0014] As a further solution of the present invention: the inner wall of the displacement groove is in contact with the outer wall of the displacement frame, and a second threaded hole is formed at the bottom end of the displacement frame, and the second threaded hole matches the second threaded rod.

[0015] As a further solution of the present invention: the inner wall of the transverse groove is in contact with the outer wall of the transverse plate, and one end of the extrusion plate extending to the inner cavity of the transverse groove is provided with a first inclined surface.

[0016] As a further solution of the present invention: a second inclined surface is provided at the bottom end of the fixing frame, and the outer wall of the bottom end of the fixing frame is in contact with the inner wall of the fixing groove.

[0017] As a further solution of the present invention: one end of the connecting frame extending from the displacement frame is provided with a third inclined surface, and outer walls of the connecting frame and the fixing frame are provided with tooth grooves, and the tooth grooves are meshed with the spur gears.

[0018] As a further solution of the present invention: the inner wall of the vertical groove is in contact with the outer wall of one end of the connecting rod.

[0019] As a further solution of the present invention: a fourth inclined surface is provided at the bottom end of the pushing frame.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention improves the welding fixture in the laser welding process, which can quickly absorb excess welding heat, help the weld to dissipate heat, and inhibit the generation of wave deformation; when the fixture is used, the diaphragm is placed on the flange body, and is pressed by the pressing block, and the positioning ring positions the pressing block; during welding, the laser passes through the opening on the pressing block to perform multiple turns of welding operation on the diaphragm and the flange body.

[0022] 2. In order to keep the opening position of the positioning ring always below the laser and avoid the positioning ring from shifting and affecting the welding effect of the flange body and the diaphragm, the present invention also specially designs a welding device. The welding device is provided with a clamping mechanism. The second motor drives the displacement frame to move, and the displacement of the displacement frame drives the displacement of the rotating column. The rotating seat and the rotating column clamp the flange body together. At the same time, when the movable seat slides in the movable groove, the transverse plate is inserted into the transverse groove and contacts the extrusion plate, and the clamping frame moves to clamp and fix the positioning ring, and the opening of the positioning ring is kept facing the laser emitter, which is convenient for clamping and fixing the flange body, and the positioning ring is automatically clamped and fixed. When welding is performed, the opening of the positioning ring moves to the bottom of the laser emitter, which is convenient for performing multiple-turn welding operations between the flange body and the diaphragm.

[0023] 3. The welding equipment is provided with a limiting mechanism. When the rotating column moves downward and contacts the clamping block, the limiting plate contacts the top of the positioning ring, and presses the positioning ring downward to limit the position, so that the positioning ring maintains moderate compression with the clamping block; when the movable seat moves, the cross plate is inserted into the cross groove, and first drives the clamping frame to clamp and fix the positioning ring, and then the cross plate contacts the pushing frame, and the fixing frame moves out of the fixing groove, canceling the fixation of the limiting plate, and the limiting plate rotates and separates from the positioning ring under the torsion force of the torsion spring, thereby preventing the limiting plate from squeezing the positioning ring and the clamping block too tightly, so that when the positioning ring is clamped, the positioning ring maintains moderate compression with the clamping block, and prevents the positioning ring and the clamping block from loosening and affecting the subsequent welding heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the welding equipment of the present invention;

[0025] Figure 2 It is a schematic diagram of the connection between the flange body and the diaphragm of the present invention;

[0026] Figure 3 A schematic diagram of the internal structure of the base of the welding equipment of the present invention;

[0027] Figure 4 It is a schematic diagram of the internal structure of the movable seat of the welding equipment of the present invention;

[0028] Figure 5 It is a schematic diagram of the installation of the displacement frame of the welding equipment of the present invention;

[0029] Figure 6 It is a schematic diagram of the internal structure of the displacement frame of the welding equipment of the present invention;

[0030] Figure 7 It is a schematic structural diagram of the side plate of the welding equipment described in the present invention.

[0031] In the figure: 1, base; 2, movable groove; 3, movable seat; 4, mounting frame; 5, laser transmitter; 6, clamping mechanism; 601, first motor; 602, first threaded rod; 603, horizontal groove; 604, horizontal plate; 605, rotating motor; 606, rotating seat; 607, displacement groove; 608, displacement frame; 609, second motor; 610, second threaded rod; 611, connecting seat; 612, rotating column; 613, extrusion plate; 614 , first spring; 615, clamping frame; 7, limiting mechanism; 701, limiting plate; 702, fixing groove; 703, fixing frame; 704, second spring; 705, spur gear; 706, connecting frame; 707, groove; 708, pushing frame; 709, side plate; 710, connecting rod; 711, connecting groove; 712, inclined groove; 713, vertical groove; 714, torsion spring; 8, flange body; 9, diaphragm; 10, clamping block; 11, positioning ring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention.

[0034] See also Figures 1 to 7 In the embodiment of the present invention, the laser welding process of the pressure transmitter flange diaphragm has the following specific steps:

[0035] Step 1: Clean the surfaces of the flange body 8 and the diaphragm 9;

[0036] Step 2: Connect the flange body 8 and the diaphragm 9, place the diaphragm 9 on the top of the flange body 8, press the diaphragm 9 by the pressing block 10, and position the pressing block 10 by the positioning ring 11; wherein the pressing block 10 is a metal rotating body with a "convex" shape in the axial section, and the positioning ring is a metal ring body with an "L"-shaped cross section and a notch;

[0037] Step 3: Welding: Place the flange body 8 on the welding equipment, and the welding equipment performs multiple-circle welding operations on the flange body 8 and the diaphragm 9.

[0038] In this embodiment: the clamping block 10 and the positioning ring 11 are designed to quickly absorb the heat generated by welding, help the weld to dissipate heat, and suppress the generation of wave deformation. At the same time, they have a certain weight to eliminate the assembly gap between the flange body 8 and the diaphragm 9, making them fit tightly and facilitating fusion.

[0039] Please refer to Figures 1 to 5 The welding equipment used in step three includes a base 1, a movable groove 2 is opened at the top of the base 1, and a movable seat 3 is slidably connected to the inner wall of the movable groove 2. The top of the base 1 is located at one end of the movable groove 2 and is fixedly connected to a mounting frame 4. The outer wall of the mounting frame 4 is installed with a laser emitter 5. The flange body 8 and the positioning ring 11 are fixed to the movable seat 3 through a clamping mechanism 6. The position of the positioning ring 11 is limited by a limiting mechanism 7. The clamping mechanism 6 includes a first motor 601, and the first motor 601 is installed on the outer wall of the base 1. The output end of the first motor 601 is connected to a first threaded rod 602 that runs through the movable seat 3. The bottom end of the movable seat 3 is symmetrically opened with a transverse groove 603, and the inner wall of the movable groove 2 is symmetrically fixedly connected with a transverse plate 604. The interior of the movable seat 3 is installed with a rotating motor 60 5. The output end of the rotating motor 605 is connected to a rotating seat 606. The clamping mechanism 6 also includes a displacement groove 607 provided at the top of the movable seat 3. The displacement groove 607 is internally slidably connected to a displacement frame 608. A second motor 609 is installed inside the movable seat 3. The output end of the second motor 609 is connected to a second threaded rod 610. The second threaded rod 610 extends to the inside of the displacement frame 608. One end of the displacement frame 608 is fixedly connected to a connecting seat 611. The bottom end of the connecting seat 611 is rotatably connected to a rotating column 612. The inside of the movable seat 3 is slidably connected to an extrusion plate 613 extending to the inner cavity of the transverse groove 603. A first spring 614 is connected between the extrusion plate 613 and the movable seat 3. The outer wall of the extrusion plate 613 is fixedly connected to a clamping frame 615 extending to both sides of the rotating seat 606.

[0040] In this embodiment, the operation of the first motor 601 drives the first threaded rod 602 to rotate, and the rotation of the first threaded rod 602 drives the movable seat 3 to move, and the movable seat 3 slides in the movable groove 2, driving the flange body 8 and the diaphragm 9 that are clamped and positioned to move.

[0041] When clamping, the bottom end of the flange body 8 is inserted into the rotating seat 606, and the opening of the positioning ring 11 is kept facing the laser emitter 5. Then, the second motor 609 is started to drive the second threaded rod 610 to rotate. The rotation of the second threaded rod 610 drives the displacement frame 608 to move. The displacement frame 608 moves downward in the displacement groove 607. The displacement of the displacement frame 608 drives the connecting seat 611 to move. The displacement of the connecting seat 611 drives the rotating column 612 to move and contact with the top of the pressing block 10, so that the rotating seat 606 and the rotating The column 612 clamps the flange body 8 together. At the same time, when the movable seat 3 slides in the movable groove 2, the cross plate 604 is inserted into the cross groove 603 and contacts the extrusion plate 613. The displacement of the extrusion plate 613 causes the first spring 614 to be squeezed. The displacement of the extrusion plate 613 drives the clamping frame 615 to move. The displacement of the clamping frame 615 clamps and fixes the positioning ring 11, keeping the opening of the positioning ring 11 facing the laser emitter 5. This design facilitates the clamping and fixing of the flange body 8 and automatically clamps and fixes the positioning ring 11 at the same time.

[0042] When welding is performed, the opening of the positioning ring 11 moves to the bottom of the laser emitter 5, and the rotating motor 605 is started to drive the rotating seat 606 to rotate. The rotating seat 606 rotates to drive the flange body 8 to rotate. The laser emitter 5 operates to perform welding operations between the flange body 8 and the diaphragm 9. After the top of the flange body 8 is welded in one circle, the movable seat 3 drives the flange body 8 to move, and then welding is performed again, thereby completing the multi-circle welding operation on the top of the flange body 8.

[0043] Please refer to Figures 5 to 7The limiting mechanism 7 includes a limiting plate 701, which is rotatably connected to the outer wall of one side of the connecting seat 611. A fixing groove 702 is provided on the outer wall of the limiting plate 701. A fixing frame 703 is slidably connected to the inside of the connecting seat 611. The bottom end of the fixing frame 703 extends to the inner cavity of the fixing groove 702. A second spring 704 is connected between the fixing frame 703 and the connecting seat 611. The inside of the displacement frame 608 is located at the top of the fixing frame 703 and is rotatably connected to a spur gear 705. The inside of the displacement frame 608 is located at the top of the spur gear 705 and is slidably connected to a connecting frame 706. The connecting frame 706 extends out of the displacement frame 608. A groove 707 is provided on one side of the inner wall of the displacement groove 607. The inside of the movable seat 3 slides It is connected to a pushing frame 708, the top of which extends to the inner cavity of the groove 707, and the bottom of which extends to the inner cavity of the transverse groove 603. A connecting rod 710 is fixedly connected to one side of the limiting plate 701. The top of the movable seat 3 is located on one side of the rotating seat 606 and is fixedly connected to a side plate 709. A connecting groove 711 is provided on the outer wall of the side plate 709, and an oblique groove 712 is provided on the top of the connecting groove 711. A vertical groove 713 is provided on the top of the oblique groove 712. One end of the connecting rod 710 is located in the vertical groove 713. The limiting plate 701 is rotatably connected to the connecting seat 611 through a connecting shaft. A torsion spring 714 is mounted on the outer wall of the connecting shaft. The two ends of the torsion spring 714 are respectively connected to the limiting plate 701 and the connecting seat 611.

[0044] In this embodiment: when the displacement frame 608 moves downward and drives the connecting seat 611 and the rotating column 612 to move downward, the torsion spring 714 is in a deformed state, and the fixing frame 703 is engaged in the fixing groove 702 by the elastic force of the second spring 704, and one end of the connecting rod 710 is located in the vertical groove 713. When the rotating column 612 moves downward and contacts the clamping block 10, one end of the connecting rod 710 also enters the connecting groove 711 from the vertical groove 713. At the same time, the limiting plate 701 contacts the top of the positioning ring 11 to limit the positioning ring 11 so that the positioning ring 11 maintains a moderate pressure between the clamping block 10.

[0045] When the displacement frame 608 moves downward, the bottom end of the connecting frame 706 is driven to enter the groove 707. When the movable seat 3 moves, the cross plate 604 is inserted into the cross groove 603, and the clamping frame 615 is driven to clamp and fix the positioning ring 11. Then the cross plate 604 contacts the pushing frame 708, pushing the pushing frame 708 to move. The pushing frame 708 moves and contacts with the connecting frame 706, pushing the connecting frame 706 to move. The displacement of the connecting frame 706 drives the spur gear 705 to rotate. The rotation of the spur gear 705 drives the fixed frame 703 to move, causing the second spring 704 to be squeezed. The fixed frame 703 moves out of the fixed groove 702, canceling the fixation of the limit plate 701, and the limit plate 701 is rotated by the torsion force of the torsion spring 714 to contact the positioning ring 11. When the locking cam 710 is in the closed position, the locking cam 711 is in the closed position, and the locking cam 712 is in the closed position, so that the locking cam 712 is in the open position, and the locking cam 712 is in the open ...

[0046] Please refer to Figures 1 to 3 The inner wall of the movable groove 2 is in contact with the outer wall of the movable seat 3 . The outer wall of the movable seat 3 is provided with a first threaded hole, and the first threaded hole matches the first threaded rod 602 .

[0047] In this embodiment, the operation of the first motor 601 drives the first threaded rod 602 to rotate, the rotation of the first threaded rod 602 drives the movable seat 3 to move, the movable seat 3 slides in the movable groove 2, and drives the flange body 8 and the diaphragm 9 to move.

[0048] Please refer to Figures 3 to 5 The inner wall of the displacement groove 607 is in contact with the outer wall of the displacement frame 608 . A second threaded hole is provided at the bottom end of the displacement frame 608 , and the second threaded hole matches the second threaded rod 610 .

[0049] In this embodiment, the second motor 609 drives the second threaded rod 610 to rotate, the rotation of the second threaded rod 610 drives the displacement frame 608 to move, and the displacement of the displacement frame 608 drives the connecting seat 611 to move.

[0050] Please refer to Figures 1 to 4The inner wall of the transverse groove 603 is in contact with the outer wall of the transverse plate 604 , and one end of the extrusion plate 613 extending to the inner cavity of the transverse groove 603 is provided with a first inclined surface.

[0051] In this embodiment: when the movable seat 3 slides in the movable groove 2, the transverse plate 604 is inserted into the transverse groove 603 and contacts the extrusion plate 613. The displacement of the extrusion plate 613 causes the first spring 614 to be squeezed. The displacement of the extrusion plate 613 drives the clamping frame 615 to move. The displacement of the clamping frame 615 clamps and fixes the positioning ring 11.

[0052] Please refer to Figures 5 to 7 A second inclined surface is provided at the bottom end of the fixing frame 703 , and the outer wall of the bottom end of the fixing frame 703 is in contact with the inner wall of the fixing groove 702 .

[0053] In this embodiment, the limiting plate 701 rotates to deform the torsion spring 714 until the fixing frame 703 is engaged into the fixing groove 702 by the elastic force of the second spring 704 , thereby fixing the limiting plate 701 .

[0054] Please refer to Figures 5 to 7 The end of the connecting frame 706 extending out of the displacement frame 608 is provided with a third inclined surface, and the outer walls of the connecting frame 706 and the fixing frame 703 are provided with tooth grooves, which mesh with the spur gear 705. The bottom end of the pushing frame 708 is provided with a fourth inclined surface.

[0055] In this embodiment: the horizontal plate 604 contacts the fourth inclined surface of the pushing frame 708, pushing the pushing frame 708 to move upward, the pushing frame 708 moves and contacts the connecting frame 706, pushing the connecting frame 706 to move and retract into the displacement frame 608, the displacement of the connecting frame 706 drives the spur gear 705 to rotate, and the rotation of the spur gear 705 drives the fixed frame 703 to move.

[0056] Please refer to Figures 5 to 7 The inner wall of the vertical groove 713 is in contact with the outer wall of one end of the connecting rod 710 .

[0057] In this embodiment, when the displacement frame 608 moves upward to reset, the connecting rod 710 moves to contact the connecting groove 711 and slides along the connecting groove 711 into the vertical groove 713, and finally enters the vertical groove 713. The displacement of the connecting rod 710 drives the limiting plate 701 to reset and rotate.

[0058] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The laser welding process of the pressure transmitter flange diaphragm is characterized by: The specific steps are as follows: Step 1: Cleaning the surfaces of the flange body (8) and the diaphragm (9); Step 2: Connect the flange body (8) and the diaphragm (9), place the diaphragm (9) on the top of the flange body (8), press the diaphragm (9) with a pressing block (10), and position the pressing block (10) with a positioning ring (11); Step 3: Welding: placing the flange body (8) on a welding device, and performing a multiple-turn welding operation on the flange body (8) and the diaphragm (9) by the welding device; The welding equipment used in step 3 comprises a base (1), a movable groove (2) is provided at the top of the base (1), a movable seat (3) is slidably connected to the inner wall of the movable groove (2), a mounting frame (4) is fixedly connected to the top of the base (1) at one end of the movable groove (2), a laser emitter (5) is installed on the outer wall of the mounting frame (4), the flange body (8) and the positioning ring (11) are fixed to the movable seat (3) by a clamping mechanism (6), and the position of the positioning ring (11) is limited by a limiting mechanism (7). The clamping mechanism (6) comprises a first motor (601), the first motor (601) is mounted on the outer wall of the base (1), the output end of the first motor (601) is connected to a first threaded rod (602) that passes through the movable seat (3), the bottom end of the movable seat (3) is symmetrically provided with transverse grooves (603), the inner wall of the movable groove (2) is symmetrically fixedly connected with a transverse plate (604), a rotating motor (605) is installed inside the movable seat (3), and the output end of the rotating motor (605) is connected to a rotating seat (606); The clamping mechanism (6) further comprises a displacement groove (607) provided at the top end of the movable seat (3); a displacement frame (608) is slidably connected inside the displacement groove (607); a second motor (609) is installed inside the movable seat (3); an output end of the second motor (609) is connected to a second threaded rod (610); the second threaded rod (610) extends to the inside of the displacement frame (608); one end of the displacement frame (608) is fixedly connected to a connecting seat (611); a bottom end of the connecting seat (611) is rotatably connected to a rotating column (612); an extrusion plate (613) extending to the inner cavity of the transverse groove (603) is slidably connected inside the movable seat (3); a first spring (614) is connected between the extrusion plate (613) and the movable seat (3); and an outer wall of the extrusion plate (613) is fixedly connected to a clamping frame (615) extending to both sides of the rotating seat (606).

2. The laser welding process for the flange diaphragm of the pressure transmitter according to claim 1 is characterized in that: The limiting mechanism (7) comprises a limiting plate (701), the limiting plate (701) being rotatably connected to an outer wall of one side of the connecting seat (611), the outer wall of the limiting plate (701) being provided with a fixing groove (702), the interior of the connecting seat (611) being slidably connected with a fixing frame (703), the bottom end of the fixing frame (703) extending to the inner cavity of the fixing groove (702), a second spring (704) being connected between the fixing frame (703) and the connecting seat (611), the interior of the displacement frame (608) being located at the top end of the fixing frame (703) being rotatably connected with a spur gear (705), the interior of the displacement frame (608) being located at the top end of the spur gear (705) being slidably connected with a connecting frame (706), the connecting frame (706) extending out of the displacement frame (608), a groove (707) being provided on one side of the inner wall of the displacement groove (607), the interior of the movable seat (3) being slidably connected to the fixing frame (703), and the bottom end of the fixing frame (703) extending to the inner cavity of the fixing groove (702). A push frame (708) is connected, the top end of the push frame (708) extends to the inner cavity of the groove (707), the bottom end of the push frame (708) extends to the inner cavity of the transverse groove (603), one side of the limit plate (701) is fixedly connected to a connecting rod (710), the top end of the movable seat (3) is located on one side of the rotating seat (606) and is fixedly connected to a side plate (709), and the outer wall of the side plate (709) is provided with a connecting groove (711 ), an oblique groove (712) is formed at the top of the connecting groove (711), a vertical groove (713) is formed at the top of the oblique groove (712), one end of the connecting rod (710) is located in the vertical groove (713), the limiting plate (701) is rotatably connected to the connecting seat (611) via a connecting shaft, a torsion spring (714) is sleeved on the outer wall of the connecting shaft, and two ends of the torsion spring (714) are respectively connected to the limiting plate (701) and the connecting seat (611).

3. The laser welding process for the flange diaphragm of the pressure transmitter according to claim 1 is characterized in that: The inner wall of the movable groove (2) fits with the outer wall of the movable seat (3); the outer wall of the movable seat (3) is provided with a first threaded hole, and the first threaded hole matches the first threaded rod (602).

4. The laser welding process for the flange diaphragm of the pressure transmitter according to claim 1 is characterized in that: The inner wall of the displacement groove (607) fits with the outer wall of the displacement frame (608), and a second threaded hole is provided at the bottom end of the displacement frame (608), and the second threaded hole matches the second threaded rod (610).

5. The laser welding process for the flange diaphragm of the pressure transmitter according to claim 1 is characterized in that: The inner wall of the transverse groove (603) is in contact with the outer wall of the transverse plate (604), and one end of the extrusion plate (613) extending to the inner cavity of the transverse groove (603) is provided with a first inclined surface.

6. The laser welding process for the flange diaphragm of the pressure transmitter according to claim 2 is characterized in that: A second inclined surface is provided at the bottom end of the fixing frame (703), and the outer wall of the bottom end of the fixing frame (703) fits the inner wall of the fixing groove (702).

7. The laser welding process for the flange diaphragm of the pressure transmitter according to claim 2 is characterized in that: One end of the connecting frame (706) extending out of the displacement frame (608) is provided with a third inclined surface, and outer walls of the connecting frame (706) and the fixing frame (703) are both provided with tooth grooves, and the tooth grooves are meshed with the spur gear (705).

8. The laser welding process for the flange diaphragm of a pressure transmitter according to claim 2 is characterized in that: The inner wall of the vertical groove (713) fits into the outer wall of one end of the connecting rod (710).

9. The laser welding process for the flange diaphragm of a pressure transmitter according to claim 2 is characterized in that: A fourth inclined surface is provided at the bottom end of the pushing frame (708).

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