Pressure sensor diaphragm laser welding jig

Abstract

The utility model discloses a laser welding jig for a pressure sensor diaphragm. The laser welding jig comprises a fixing frame, a first lifting assembly, a second lifting assembly, a clamping assembly, a bearing assembly and a rotary driving assembly. The bearing assembly comprises a bearing table, an annular fixing sleeve and a pressing block. The pressing block is arranged in the annular fixing sleeve in a penetrating mode. The clamping assembly comprises a clamping jaw air cylinder and a pair of clamping jaws, the clamping jaw air cylinder is used for driving the clamping jaws to clamp the annular fixing sleeve, and the second lifting assembly is used for driving the clamping assembly to ascend and descend so that the annular fixing sleeve can move upwards to be away from the pressing block, and therefore the welding position of the pressure sensor and the diaphragm can be exposed; the rotation driving assembly is used for driving the carrying table to rotate so that the pressure sensor and the diaphragm can rotate relative to the laser. According to the utility model, the situation that pseudo soldering or solder skips are easy to occur during the welding of the pressure sensor diaphragm is effectively avoided, so that the sensing precision of the pressure sensor is ensured.

Description

[Technical field]

[0001] The utility model relates to the technical field of welding jigs, in particular to a laser welding jig for a pressure sensor diaphragm. [Background technology]

[0002] At present, the pressure sensor includes a process of welding the diaphragm during assembly. The traditional diaphragm welding process requires manually placing the diaphragm at a predetermined position of the pressure sensor, and then moving the pressure sensor with the diaphragm to the bottom of the laser manually or using a translation jig. The laser is then rotated and translated to allow the laser to relatively surround the diaphragm, thereby laser welding the diaphragm to the pressure sensor. However, due to the light weight of the diaphragm, it is easy to cause a cold weld, thereby affecting the sensing accuracy of the pressure sensor. In addition, the diaphragm is also prone to positional displacement in the pressure sensor during movement, resulting in low assembly accuracy.

[0003] In view of this, it is necessary to provide a pressure sensor diaphragm laser welding fixture to overcome the above-mentioned defects. [Utility Model Content]

[0004] The purpose of the utility model is to provide a pressure sensor diaphragm laser welding jig, aiming to improve the existing pressure sensor diaphragm welding prone to cold welding and low assembly accuracy problems, so that the diaphragm can be firmly welded to the preset position of the pressure sensor, ensuring the sensing accuracy of the finished pressure sensor.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a pressure sensor diaphragm laser welding jig, which is used to limit the diaphragm at a preset position of the pressure sensor so that the laser welds the diaphragm on the pressure sensor, including a fixing frame, a first lifting assembly arranged on the fixing frame, a second lifting assembly arranged on the first lifting assembly, a clamping assembly arranged on the second lifting assembly, and a bearing assembly and a rotating drive assembly both arranged on the bottom side of the fixing frame;

[0006] The bearing assembly includes a carrier, an annular fixing sleeve and a pressing block; the carrier is used to bear the bottom of the pressure sensor, and the annular fixing sleeve is used to be placed on the top of the pressure sensor; the pressing block is inserted into the annular fixing sleeve and is used to press the diaphragm at a preset position of the pressure sensor;

[0007] The clamping assembly includes a clamping cylinder and a pair of clamping jaws arranged on the clamping cylinder, the clamping cylinder is used to drive the pair of clamping jaws to clamp the annular fixing sleeve, the second lifting assembly is used to drive the clamping assembly to rise and fall, so as to move the annular fixing sleeve upward and away from the pressure block, thereby exposing the welding position of the pressure sensor and the diaphragm; the rotation drive assembly is used to drive the carrier to rotate, so that the pressure sensor and the diaphragm can rotate relative to the laser.

[0008] In a preferred embodiment, the first lifting assembly includes a mounting seat fixed to the side of the fixing frame away from the bearing assembly, a first lifting motor fixed to the top of the mounting seat, and a mounting plate arranged on the movable end of the first lifting motor; the second lifting assembly is arranged on the mounting plate; a through hole is opened in the middle of the fixing frame; a first support plate passing through the through hole is arranged on the side of the mounting plate close to the bearing assembly, and the first support plate is provided with a pressing head; the first lifting motor is used to drive the mounting plate to rise and fall, so that the second lifting assembly can be raised and lowered and the pressing head can press the pressing block.

[0009] In a preferred embodiment, the second lifting assembly includes a second lifting motor installed on the mounting plate, and a second support plate provided at the movable end of the second lifting motor and passing through the through hole; the clamping cylinder is provided on the second support plate along the horizontal direction.

[0010] In a preferred embodiment, the pressure head includes a cushion block and a first pressure rod coaxially connected to the cushion block; the first support plate is provided with a mounting hole, the cushion block is arranged above the mounting hole, and one end of the first pressure rod away from the cushion block extends out of the mounting hole; the cushion block and the first pressure rod are provided with a raised pressing contact on one side away from each other.

[0011] In a preferred embodiment, a third lifting assembly is also provided on the top of the fixed frame, and the third lifting assembly includes a third lifting motor and a second pressure rod provided on the movable end of the third lifting motor; the third lifting motor is used to drive the second pressure rod to press the cushion block.

[0012] In a preferred embodiment, the annular fixing sleeve extends vertically outward from one end edge of the carrier away from the carrier to form a limiting skirt.

[0013] In a preferred embodiment, the rotary drive assembly includes a rotary motor and a reduction gearbox meshed with the output end of the rotary motor; a drive gear is coaxially provided at the bottom of the carrier, and the drive gear is meshed with the reduction gearbox so that the rotary motor can drive the carrier to rotate around its own central axis.

[0014] In a preferred embodiment, the annular fixing sleeve includes a first clamping ring and a second clamping ring; the first clamping ring is provided with a receiving groove, and the bottom of the receiving groove is provided with a through hole for the pressure block to pass through; the second clamping ring includes a first ring ring and a second ring ring arranged coaxially, the diameter of the first ring ring is larger than the diameter of the second ring ring, and the outer wall of the first ring ring is attached to the bottom of the receiving groove and surrounds the receiving groove; the second ring ring is used to enclose a limiting diaphragm.

[0015] In a preferred embodiment, the first snap ring is provided with a plurality of sockets on the top of the side wall of the receiving groove, and a snap groove corresponding to the sockets is provided along the circumference of the side wall of the first snap ring; the outer surface of the first ring is provided with a plurality of pin holes corresponding to the sockets, and each of the pin holes is removably inserted with a limit pin; the limit pin extends into the slot through the corresponding socket and can move in the slot to enable the first snap ring and the second snap ring to rotate relative to each other.

[0016] The pressure sensor diaphragm laser welding jig provided by the utility model can limit the diaphragm on the top of the pressure sensor through the annular fixing sleeve before welding, so that the diaphragm will not deviate in the pressure sensor when it moves to the vicinity of the laser; when preparing for welding, the first lifting component can press the pressure block, and then the second lifting component drives a pair of clamps to lift the annular fixing sleeve upward, leaving only the pressure block pressed on the diaphragm. In this process, since the first lifting component presses the pressure block, the diaphragm is kept in a state of being pressed on the pressure sensor, so the action of the second lifting component lifting the annular fixing sleeve will not cause the pressure block to shake. During welding, the second lifting component rises to expose the welding part of the diaphragm and the pressure sensor, so that the rotating drive component drives the carrier to rotate, so that the pressure sensor and the diaphragm can rotate relative to the laser, and the laser can surround the diaphragm and weld the diaphragm to the pressure sensor by laser welding. During the welding process, the pressure block always keeps the state of pressing the diaphragm, and will not affect the rotation of the carrier, effectively avoiding the situation that the pressure sensor diaphragm welding is prone to false welding or leaking welding, thereby ensuring the sensing accuracy of the pressure sensor.

Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A three-dimensional diagram of a laser welding jig for a pressure sensor diaphragm provided by the utility model;

[0019] Figure 2 for Figure 1 The rear view of the laser welding fixture for the pressure sensor diaphragm is shown;

[0020] Figure 3 for Figure 2 The following is a partial exploded view of the laser welding fixture for the pressure sensor diaphragm;

[0021] Figure 4for Figure 2 The shown is a partial enlarged view of the pressure sensor diaphragm laser welding fixture in the welding state.

[0022] Numbers in the figure: 100, laser welding fixture for pressure sensor diaphragm; 200, diaphragm; 300, pressure sensor; 400, laser; 1, fixing frame; 10, first lifting assembly; 11, mounting seat; 12, first lifting motor; 13, mounting plate; 14, first support plate; 15, pressure head; 151, cushion block; 152, first pressure rod; 153, pressing contact; 20, second lifting assembly; 21, second lifting motor; 22, second support plate; 30, clamping assembly; 31 , clamping cylinder; 32, clamping jaw; 40, bearing assembly; 41, carrier; 42, annular fixing sleeve; 421, limiting skirt; 422, first retaining ring; 4221, socket; 4222, slot; 423, second retaining ring; 4231, first ring; 4232, second ring; 4233, pin hole; 444, through hole; 43, pressure block; 50, rotation drive assembly; 51, rotation motor; 60, third lifting assembly; 61, third lifting motor; 62, second pressure rod. [Specific implementation method]

[0023] In order to make the purpose, technical solution and beneficial technical effect of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described in this specification are only for explaining the utility model, and are not intended to limit the utility model.

[0024] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0025] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0026] In an embodiment of the utility model, a pressure sensor diaphragm laser welding jig 100 is provided, which is used to limit the diaphragm 200 to a preset position of the pressure sensor 300, so that the laser 400 welds the diaphragm 200 to the pressure sensor 300. The diaphragm 200 is in the shape of a circular sheet, and the laser 400 needs to surround the diaphragm 200 for a circle so as to weld all the circular edges of the diaphragm 200 to the predetermined position (at the top in the figure) of the pressure sensor 300, thereby obtaining a finished pressure sensor.

[0027] like Figure 1-Figure 4 As shown, the pressure sensor diaphragm laser welding fixture 100 includes a fixed frame 1, a first lifting assembly 10 arranged on the fixed frame 1, a second lifting assembly 20 arranged on the first lifting assembly 10, a clamping assembly 30 arranged on the second lifting assembly 20, and a bearing assembly 40 and a rotating drive assembly 50 both arranged on the bottom side of the fixed frame 1.

[0028] The bearing assembly 40 includes a carrier 41, an annular fixing sleeve 42 and a pressing block 43. In the present embodiment, the carrier 41 is provided with a cylindrical groove, and the circular bottom of the pressure sensor 300 is snapped into the groove. The annular fixing sleeve 42 is used to be placed on the top of the pressure sensor 300, and a cylindrical through hole is also provided in the middle. The pressing block 43 is in the shape of a free cylinder and is inserted into the cylindrical through hole of the annular fixing sleeve 42, and is used to press the diaphragm 200 at a preset position of the pressure sensor 300. That is, when the annular fixing sleeve 42 is placed on the top of the pressure sensor 300, the pressing block 43 can press the diaphragm 200 on the top of the pressure sensor 300 when pressed.

[0029] The clamping assembly 30 includes a clamping claw cylinder 31 and a pair of clamping claws 32 disposed on the clamping claw cylinder 31. The clamping claw cylinder 31 is placed horizontally and drives the pair of clamping claws 32 to move closer to or farther from each other. The specific driving principle can be referred to the prior art, and the utility model will not be repeated here. Specifically, the clamping claw cylinder 31 is used to drive the pair of clamping claws 32 to clamp the annular fixing sleeve 42, so that the annular fixing sleeve 42 can be lifted and lowered synchronously with the clamping claw cylinder 31 after being clamped.

[0030] Furthermore, the edge of one end of the annular fixing sleeve 42 away from the carrier 41 vertically extends outward to form a limiting skirt 421. When the pair of clamping jaws 32 clamp the annular fixing sleeve 42, the annular fixing sleeve 42 can be effectively prevented from falling from the pair of clamping jaws 32.

[0031] The first lifting assembly 10 includes a mounting seat 11 fixed to the side of the fixing frame 1 away from the bearing assembly 40, a first lifting motor 12 fixed to the top of the mounting seat 11, and a mounting plate 13 arranged on the movable end of the first lifting motor 12. The second lifting assembly 20 is arranged on the mounting plate 13. A through hole (not shown in the figure) is opened in the middle of the fixing frame 10. A first support plate 14 passing through the through hole is provided on the side of the mounting plate 13 close to the bearing assembly 40, and the first support plate 14 is provided with a pressing head 15. The first lifting motor 12 is used to drive the mounting plate 13 to rise and fall, so that the second lifting assembly 20 can rise and fall and the pressing head 15 can press the pressing block 43. Specifically, the first lifting motor 12 can simultaneously drive the second lifting assembly 20 and the pressing head 15 to rise and fall synchronously. When the pressure sensor 300 and the diaphragm 200 are placed on the carrier assembly 40, the pressure head 15 can press the pressing block 43 together. At this time, the second lifting assembly 20 can drive the clamping assembly 30 to rise alone, so that the annular fixing sleeve 42 is separated from the pressing block 43, so that the pressing block 43 presses the diaphragm 200 on the pressure sensor 300 alone, and exposes the welding part of the diaphragm 200 and the pressure sensor 300. During welding, the pressure head 15 maintains the pressure of the pressing block 43 to ensure that the diaphragm 200 has enough pressure on the pressure sensor 300 during welding to avoid the situation of cold welding.

[0032] The second lifting assembly 20 includes a second lifting motor 21 mounted on the mounting plate 13, and a second support plate 22 disposed at the movable end of the second lifting motor 21 and passing through the through hole. The gripper cylinder 31 is disposed on the second support plate 22 in the horizontal direction.

[0033] Furthermore, the pressure head 15 includes a cushion block 151 and a first pressure rod 152 coaxially connected to the cushion block 151. The first support plate 14 is provided with a mounting hole (not shown in the figure), the cushion block 151 is provided above the mounting hole, and one end of the first pressure rod 152 away from the cushion block 151 extends out of the mounting hole. In this embodiment, the cushion block 151 is cylindrical, and its area is larger than that of the mounting hole.

[0034] Furthermore, a third lifting assembly 60 is also provided on the top of the fixing frame 1. The third lifting assembly 60 includes a third lifting motor 61 and a second pressing rod 62 provided on the movable end of the third lifting motor 61. The third lifting motor 61 is used to drive the second pressing rod 62 to press the cushion block 151, so that the diaphragm 200 can be fully pressed and the diaphragm 200 will not be damaged due to excessive pressure.

[0035] The pad 151 and the first pressure rod 152 are both provided with a convex pressing contact 153 on the side away from each other to improve the pressing effect. During welding, since the first pressure rod 152 presses the pressing block 43, and the pressing block 43 rotates with the rotation of the diaphragm 200, the contact area between the first pressure rod 152 and the pressing block 43 can be reduced by providing the pressing contact 153, so as to reduce the resistance to the relative rotation between the two.

[0036] The rotation drive assembly 50 includes a rotation motor 51 and a reduction gearbox (not shown in the figure) meshed with the output end of the rotation motor 51. A driving gear (not shown in the figure) is coaxially provided at the bottom of the carrier 41, and the driving gear is meshed with the reduction gearbox so that the rotation motor 51 can drive the carrier 41 to rotate around its own central axis.

[0037] In this embodiment, the annular fixing sleeve 42 includes a first snap ring 422 and a second snap ring 423. The first snap ring 422 is provided with a receiving groove (not shown in the figure), and the opening of the receiving groove is arranged downward. The bottom of the receiving groove (i.e., the top of the first snap ring 422) is provided with a through hole 444 for the pressure block 43 to pass through, and the second snap ring 423 is also provided with a corresponding through hole 444, and the through hole 444 is for the pressure block 43 to pass through.

[0038] The second clamping ring 423 includes a first ring 4231 and a second ring 4232 which are coaxially arranged. The diameter of the first ring 4231 is larger than the diameter of the second ring 4232. The outer wall of the first ring 4231 is attached to the bottom of the receiving groove and is arranged around the receiving groove. The second ring 4232 is used to surround the limiting diaphragm 200 to limit the diaphragm 200 to a predetermined position of the pressure sensor 300 to avoid deviation.

[0039] The first snap ring 422 is provided with a plurality of sockets 4221 at the top of the side wall of the receiving groove, and a slot 4222 corresponding to the sockets 4221 is provided along the circumference of the side wall of the first snap ring 422. The outer surface of the first ring 4231 is provided with a plurality of pin holes 4233 corresponding to the sockets 4221, and each pin hole 4233 can be removably inserted with a limit pin (not shown in the figure). The limit pin extends into the slot 4222 through the corresponding socket 4221 and can move in the slot 4222, so that the first snap ring 422 and the second snap ring 423 rotate relative to each other, so that the second snap ring 423 is clamped in the first snap ring 422, so that the second snap ring 423 can be driven up and down by the first snap ring 422.

[0040] In this embodiment, the second lifting assembly 20 is used to drive the clamping assembly 30 to move up and down, so as to move the annular fixing sleeve 42 upward and away from the pressing block 43, thereby exposing the welding position of the pressure sensor 300 and the diaphragm 200. The rotation driving assembly 50 is used to drive the stage 41 to rotate, so that the pressure sensor 300 and the diaphragm 200 can rotate relative to the laser 400.

[0041] The specific use principle of the utility model is:

[0042] (1) manually placing the diaphragm 200 at a predetermined position of the pressure sensor 300, placing the annular fixing sleeve 42 above the diaphragm 200, and placing the pressing block 43 inside the annular fixing sleeve 42;

[0043] (2) manually placing the integrated structure of the pressure sensor 300 with the diaphragm 200 and the annular fixing sleeve 42 in the groove of the carrier 41, and then driving the first lifting assembly 10 downward to make the pressing head 15 press the pressing block 43, and make the pair of clamping jaws 32 in a relaxed state to be spaced apart outside the annular fixing sleeve 42;

[0044] (3) The clamping cylinder 31 drives a pair of clamping jaws 32 to clamp the outer surface of the annular fixing sleeve 42, and the second lifting assembly 20 drives the clamping assembly 30 to rise, so that the annular fixing sleeve 42 is separated from the pressing block 43, so as to expose the welding part between the diaphragm 200 and the pressure sensor 300;

[0045] (4) The rotating motor 51 drives the carrier 41 to rotate, thereby driving the pressure sensor 300 and the diaphragm 200 to rotate synchronously, and the laser 400 irradiates the welding part to perform welding;

[0046] (5) After welding is completed, the first lifting assembly 10 drives the pressure head 15 to rise to release the pressing action on the pressure block 43, and then the pressure block 43 is manually removed to obtain a welded pressure sensor product.

[0047] To sum up, the pressure sensor diaphragm laser welding jig 100 provided by the utility model can, before welding, limit the diaphragm 200 to the top of the pressure sensor 300 through the annular fixing sleeve 42, so that the diaphragm 200 will not deviate in the pressure sensor 300 when moving to the vicinity of the laser 400; when preparing for welding, the first lifting component 10 can press the pressure block 43, and then the second lifting component 20 drives a pair of clamps 32 to lift the annular fixing sleeve 42 upward, leaving only the pressure block 43 pressed on the diaphragm 200. In this process, since the first lifting component 10 presses the pressure block 43, thereby keeping the diaphragm 200 in a state of being pressed against the pressure sensor 300, the pressure block 43 will not shake due to the action of the second lifting component 20 lifting the annular fixing sleeve 42. During welding, the second lifting assembly 20 rises so that the rotation drive assembly 50 drives the carrier 41 to rotate, so that the pressure sensor 300 and the diaphragm 200 can rotate relative to the laser 400, and the laser 400 can circle the diaphragm 200 to weld the diaphragm 200 to the pressure sensor 300 by laser welding. During the welding process, the pressing block 43 always keeps the diaphragm 200 pressed and will not affect the rotation of the carrier 41, effectively avoiding the situation where the pressure sensor 300 and the diaphragm 200 are easily welded or leaked, thereby ensuring the sensing accuracy of the pressure sensor 300.

[0048] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. A pressure sensor diaphragm laser welding jig, used to limit the diaphragm to a preset position of the pressure sensor so that the laser can weld the diaphragm to the pressure sensor, characterized in that: It comprises a fixed frame, a first lifting assembly arranged on the fixed frame, a second lifting assembly arranged on the first lifting assembly, a clamping assembly arranged on the second lifting assembly, and a bearing assembly and a rotating driving assembly both arranged on the bottom side of the fixed frame; The bearing assembly includes a carrier, an annular fixing sleeve and a pressing block; the carrier is used to bear the bottom of the pressure sensor, and the annular fixing sleeve is used to be placed on the top of the pressure sensor; the pressing block is inserted into the annular fixing sleeve and is used to press the diaphragm at a preset position of the pressure sensor; The clamping assembly includes a clamping cylinder and a pair of clamping jaws arranged on the clamping cylinder, the clamping cylinder is used to drive the pair of clamping jaws to clamp the annular fixing sleeve, the second lifting assembly is used to drive the clamping assembly to rise and fall, so as to move the annular fixing sleeve upward and away from the pressure block, thereby exposing the welding position of the pressure sensor and the diaphragm; the rotation drive assembly is used to drive the carrier to rotate, so that the pressure sensor and the diaphragm can rotate relative to the laser.

2. The pressure sensor diaphragm laser welding jig according to claim 1, characterized in that: The first lifting assembly includes a mounting seat fixed to a side of the fixing frame away from the bearing assembly, a first lifting motor fixed to the top of the mounting seat, and a mounting plate arranged on the movable end of the first lifting motor; the second lifting assembly is arranged on the mounting plate; a through hole is opened in the middle of the fixing frame; a first support plate passing through the through hole is arranged on a side of the mounting plate close to the bearing assembly, and the first support plate is provided with a pressing head; the first lifting motor is used to drive the mounting plate to rise and fall, so that the second lifting assembly can rise and fall and the pressing head can press the pressing block.

3. The pressure sensor diaphragm laser welding jig according to claim 2, characterized in that: The second lifting assembly includes a second lifting motor installed on the mounting plate, and a second support plate provided at the movable end of the second lifting motor and passing through the through hole; the clamping claw cylinder is provided on the second support plate along the horizontal direction.

4. The pressure sensor diaphragm laser welding jig according to claim 2, characterized in that: The pressure head includes a cushion block and a first pressure rod coaxially connected to the cushion block; the first support plate is provided with a mounting hole, the cushion block is arranged above the mounting hole, and one end of the first pressure rod away from the cushion block extends out of the mounting hole; the cushion block and the first pressure rod are both provided with a convex pressing contact on one side away from each other.

5. The pressure sensor diaphragm laser welding jig according to claim 4, characterized in that: A third lifting assembly is also provided on the top of the fixing frame. The third lifting assembly includes a third lifting motor and a second pressing rod provided on the movable end of the third lifting motor. The third lifting motor is used to drive the second pressing rod to press the cushion block.

6. The pressure sensor diaphragm laser welding jig according to claim 1, characterized in that: The edge of one end of the annular fixing sleeve away from the carrier vertically extends outward to form a limiting skirt.

7. The pressure sensor diaphragm laser welding jig according to claim 1, characterized in that: The rotary drive assembly includes a rotary motor and a reduction gearbox meshed with the output end of the rotary motor; a driving gear is coaxially provided at the bottom of the carrier, and the driving gear is meshed with the reduction gearbox so that the rotary motor can drive the carrier to rotate around its own central axis.

8. The pressure sensor diaphragm laser welding jig according to claim 1, characterized in that: The annular fixing sleeve includes a first clamping ring and a second clamping ring; the first clamping ring is provided with a receiving groove, and the bottom of the receiving groove is provided with a through hole for the pressure block to pass through; the second clamping ring includes a first ring ring and a second ring ring arranged coaxially, the diameter of the first ring ring is larger than the diameter of the second ring ring, and the outer wall of the first ring ring is attached to the bottom of the receiving groove and surrounds the receiving groove; the second ring ring is used to enclose a limiting diaphragm.

9. The pressure sensor diaphragm laser welding jig according to claim 8, characterized in that: The first snap ring is provided with a plurality of sockets at the top of the side wall of the receiving groove, and a snap groove corresponding to the sockets is provided along the circumference of the side wall of the first snap ring; the outer surface of the first ring is provided with a plurality of pin holes corresponding to the sockets, and each of the pin holes is removably inserted with a limit pin; the limit pin extends into the slot through the corresponding socket and can move in the slot to enable the first snap ring and the second snap ring to rotate relative to each other.

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