Tube shell clamp and welding method

Abstract

The invention provides a tube shell clamp and a welding method, and relates to the technical field of chip packaging, the tube shell clamp comprises a fixing table, the left side and the right side of the fixing table are provided with a first clamping assembly and a second clamping assembly respectively, and the first clamping assembly and the second clamping assembly are used for pressing a tube shell on the fixing table respectively; each of the first clamping assembly and the second clamping assembly comprises a first lever, a second lever, a vertical rod, an upper limiting structure and a lower limiting structure, the first lever comprises a first end and a second end which are opposite to each other, and the second lever comprises a third end and a fourth end which are opposite to each other; the first end is connected with a pressure head which is used for crimping with a tube shell, the third end is located below the second end, and a spring is connected between the third end and the second end; the vertical rod is connected with the fixing table, the upper limiting structure is connected to the vertical rod, and the position of the upper limiting structure in the vertical direction is adjustable; the fourth end is located below the upper limiting structure.

Description

Technical Field

[0001] The present invention relates to the technical field of chip packaging, and in particular to a shell fixture and a welding method. Background Art

[0002] At present, in the military packaging industry, it is mainly divided into three major processes: mounting, wire bonding, and capping. The chip is fixed to the bottom of the shell through an adhesive such as conductive adhesive, and then the bonding fingers of the shell and the chip pads are pressure-welded and connected through silicon-aluminum wires or gold wires. Finally, the shell cavity is sealed with a cover plate to complete the chip packaging.

[0003] In the wire bonding process, to ensure product quality, the shell is mostly wire-bonded one by one during wire bonding. The fixed stage used is mostly a knob type. By rotating the knob, the transverse moving block is driven to move horizontally, and then the transverse moving block drives the lifting arm to move up and down through a rotating shaft, so as to press the shell.

[0004] Since the fixing force of the stage on the shell comes from the rotation of the knob, at the transverse moving block, the screw rod of the knob and the transverse moving block are in a long-term friction state, resulting in metal residues being generated at all times. In the long run, it is not conducive to equipment maintenance and the control of the factory hygiene environment. Moreover, the downward pressure of the lifting arm is manually controlled by the operator and cannot be quantified, resulting in poor consistency during batch production. Summary of the Invention

[0005] The purpose of the present invention is to provide a shell fixture and a welding method to alleviate the technical problems that metal residues fall off during the process of the existing carrier driving the lifting arm to move by rotating the knob, and the downward pressure of the lifting arm is manually controlled by the operator and cannot be quantified, resulting in poor consistency during batch production.

[0006] A shell fixture provided by an embodiment of the present invention includes: a fixed stage, a first clamping assembly and a second clamping assembly are respectively arranged on the left and right sides of the fixed stage, and the first clamping assembly and the second clamping assembly are used to respectively press the shell on the fixed stage;

[0007] Both the first clamping assembly and the second clamping assembly include: a first lever, a second lever, a vertical rod and an upper limit structure. The first lever includes a first end and a second end which are opposite to each other, and the second lever includes a third end and a fourth end which are opposite to each other; the first end is connected with a pressing head, and the pressing head is used to press against the shell. The third end is located below the second end, and a spring is connected between the two; the vertical rod is connected with the fixed stage, the upper limit structure is connected to the vertical rod, and the position of the upper limit structure in the vertical direction is adjustable; the fourth end is located below the upper limit structure.

[0008] Further, the shell fixture further includes a lower limit structure, the lower limit structure is connected to the vertical rod, the position of the lower limit structure in the vertical direction is adjustable, and the fourth end is located between the upper limit structure and the lower limit structure.

[0009] Further, a pressure sensor is connected to the first end, and a pressure head is connected to the detection end of the pressure sensor.

[0010] Further, the upper limit structure includes a first sliding locking member, the first sliding locking member is connected to the vertical rod so that the first sliding locking member can slide on the vertical rod and be fixed at an expected position, a first stop structure is movably connected to the first sliding locking member, the first stop structure has a first state and a second state, in the first state, the first stop structure is located on the swinging path of the fourth end, and in the second state, the first stop structure is located outside the swinging path of the fourth end.

[0011] Further, the first stop structure is slidably connected to the first sliding locking member.

[0012] Further, the first stop structure is rotatably connected to the first sliding locking member.

[0013] Further, the lower limit structure includes a second sliding locking member so that the second sliding locking member can slide on the vertical rod and be fixed at an expected position, the second sliding locking member is connected to the vertical rod, and a second stop structure is connected to the second sliding locking member.

[0014] Further, the fixing table includes two side wings respectively arranged on its left and right sides, the first lever, the second lever and the vertical rod are all connected to the side wings; in the left-right direction, the distance between the side wings and the fixing table is adjustable.

[0015] Further, a connecting plate is fixedly connected to the fixing table, the side wing is slidably connected to the connecting plate, a first elongated hole extending in the left-right direction is arranged on the connecting plate, a second elongated hole extending in the left-right direction is arranged on the side wing, the shell fixture further includes a locking bolt and a locking nut, and the tail end of the locking bolt sequentially passes through the first elongated hole and the second elongated hole and then is connected to the locking nut.

[0016] Further, the pressure head is detachably connected to the detection end of the pressure sensor.

[0017] Further, a dovetail protrusion is arranged on the detection end of the pressure sensor, and a dovetail groove slidably connected to the dovetail protrusion is arranged on the pressure head.

[0018] Second aspect, a welding method provided by an embodiment of the present invention is implemented by using the above shell fixture, and includes the steps:

[0019] S1. Place the adjustment test tube shell in the tube shell fixture;

[0020] S2. Adjust the up-and-down position of the upper limit structure so that the pressure of the pressing head on the adjustment test tube shell reaches the required value, and fix the upper limit structure to the vertical rod;

[0021] S3. Adjust the first stop structure to the second state; Replace the adjustment test tube shell with the tube shell to be welded;

[0022] S4. Press the fourth end and adjust the first stop structure to the first state, and the fourth end is stopped below by the first stop structure;

[0023] S5. Weld the tube shell to be welded.

[0024] Further, the welding method further includes a step performed between step S2 and step S3:

[0025] Press the fourth end downward until it contacts the second stop structure, release the lower limit structure, and move the lower limit structure together with the fourth end until the pressure of the pressing head on the adjustment test tube shell reaches the maximum value within the qualified range, and then fix the lower limit structure.

[0026] The shell fixture provided by the embodiment of the present invention includes: a fixed table, with a first clamping component and a second clamping component respectively arranged on the left and right sides of the fixed table, and the first clamping component and the second clamping component are used to respectively press the shell on the fixed table; both the first clamping component and the second clamping component include: a first lever, a second lever, a vertical rod and an upper limit structure. The first lever includes an opposite first end and a second end, and the second lever includes an opposite third end and a fourth end. The first end is connected with a pressing head, and the pressing head is used for press-connecting with the shell. The third end is located below the second end, and a spring is connected between the two; the vertical rod is connected with the fixed table, the upper limit structure is connected to the vertical rod, and the position of the upper limit structure is adjustable in the vertical direction; the fourth end is located below the upper limit structure. The operating principles of the first clamping component and the second clamping component are the same. Taking the first clamping component as an example to illustrate the principle, place the shell on the fixed table, push the fourth end downward, the third end moves upward, drive the second end to move upward through the spring, and the pressing head at the first end presses the shell downward. Adjust the upper limit structure so that the upper limit structure blocks the fourth end from above, and by adjusting the height of the upper limit structure, the pressure of the pressing head can be changed. When the pressure of the pressing head on the shell reaches the required value, fix the position of the upper limit structure. When the shell needs to be replaced, loosen the upper limit structure, release the fourth end, and under the action of the spring, the pressing head is released, and the shell can be taken away. When setting the position of the pressing head, the pressure of the pressing head can be detected by means of a pressure sensor, so as to avoid applying excessive pressure to the shell and causing damage to the shell. At the same time, the method adopted in this solution is to transmit pressure through a two-stage lever, which can avoid the generation of metal debris and improve safety; moreover, the first lever and the second lever are connected by a spring, so that the force exerted by the second lever on the first lever is a non-rigid force, reducing the risk of the shell being crushed caused by improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic diagram of the shell fixture provided by the embodiment of the present invention;

[0029] Figure 2 is Figure 1 a partial enlarged view of position A in

[0030] Figure 3 It is a cross-sectional view at the first end position of the shell fixture provided by the embodiment of the present invention.

[0031] Icons: 100 - fixed station; 110 - gasket; 120 - shell;

[0032] 210 - first lever; 211 - first end; 212 - second end; 213 - indenter;

[0033] 220 - second lever; 221 - third end; 222 - fourth end;

[0034] 300 - spring;

[0035] 410 - first sliding locking member; 420 - first stop structure;

[0036] 510 - second sliding locking member; 520 - second stop structure;

[0037] 610 - flank; 620 - connecting plate; 630 - locking bolt;

[0038] 700 - pressure sensor. Detailed implementation manners

[0039] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] Such as Figure 1 - Figure 3As shown in the figure, the shell 120 fixture provided by the embodiment of the present invention includes: a fixed table 100, a first clamping assembly and a second clamping assembly are respectively arranged on the left and right sides of the fixed table 100, and the first clamping assembly and the second clamping assembly are used to respectively press the left and right ends of the shell 120 on the fixed table 100; both the first clamping assembly and the second clamping assembly include: a first lever 210, a second lever 220, a vertical rod, an upper limit structure and a lower limit structure. The first lever 210 includes a first end 211 and a second end 212 opposite to each other. The second lever 220 includes a third end 221 and a fourth end 222 opposite to each other. A pressure sensor 700 is connected to the first end 211, and a detection end of the pressure sensor 700 is connected to a pressing head 213. The pressing head 213 is used to press against the first end of the shell 120. The third end 221 is located below the second end 212, and a spring 300 is connected between the two; the vertical rod is connected to the fixed table 100, the upper limit structure and the lower limit structure are connected to the vertical rod, and the positions of the upper limit structure and the lower limit structure are adjustable in the vertical direction; the fourth end 222 is located between the upper limit structure and the lower limit structure. The operating principles of the first clamping assembly and the second clamping assembly are the same. Taking the first clamping assembly as an example to illustrate the principle, place the shell 120 on the fixed table 100, push the fourth end 222 downward, the third end 221 moves upward, drives the second end 212 to move upward through the spring 300, and the pressing head 213 at the first end 211 presses the shell 120 downward. Adjust the upper limit structure so that the upper limit structure blocks the fourth end 222 from above, and by adjusting the height of the upper limit structure, the pressure of the pressing head 213 can be changed. The pressure is detected by the pressure sensor 700. When the pressure of the pressing head 213 on the shell 120 reaches the required value, fix the position of the upper limit structure. After the position of the upper limit structure is fixed, press the fourth end 222 downward. When the pressure of the pressing head 213 on the shell 120 reaches the maximum threshold, make the lower limit structure contact the lower surface of the fourth end 222 and fix the lower limit structure. At this time, the gap between the upper limit structure and the lower limit structure is the allowable movement space of the fourth end 222. When the shell 120 needs to be replaced, loosen the upper limit structure, release the fourth end 222, and under the action of the spring 300, the pressing head 213 is released, and the shell 120 can be taken away. When setting the position of the pressing head 213, the pressure of the pressing head 213 can be detected by means of the pressure sensor 700, so as to avoid applying excessive pressure to the shell 120 by the pressing head 213 and causing damage to the shell 120. At the same time, the method adopted in this solution is to transmit pressure by a two-stage lever, which can avoid the generation of metal debris and improve safety; moreover, the first lever 210 and the second lever 220 are connected by a spring 300, so that the force exerted by the second lever 220 on the first lever 210 is a non-rigid force, reducing the risk of damaging the shell 120 caused by improper operation.

[0041] In addition to being arranged at the first end 211, the pressure sensor can also be arranged on the fixed platform 100. When the shell is subjected to pressure, the pressure acts on the pressure sensor on the fixed platform 100, so as to obtain the pressure value on the shell. The shell fixture can also include an adjusting shell, and the pressure sensor is arranged on the adjusting shell. During the debugging process, the first clamping assembly and the second clamping assembly press on the pressure sensor on the adjusting shell, so as to obtain the actual pressure value during the debugging stage.

[0042] The upper limit structure includes a first sliding locking member 410, and the first sliding locking member 410 is connected to the vertical rod so that the first sliding locking member 410 can slide on the vertical rod and be fixed at an expected position. A first stop structure 420 is movably connected to the first sliding locking member 410. The first stop structure 420 has a first state and a second state. In the first state, the first stop structure 420 is located on the swinging path of the fourth end 222. In the second state, the first stop structure 420 is located outside the swinging path of the fourth end 222.

[0043] The first sliding locking member 410 can be a tightening member, and the tightness of the tightening member is adjustable. It includes two split metal sheets. The metal sheets are in an "Ω" shape. The bent positions of the two metal sheets surround the vertical rod. One end of the two metal sheets is fixedly connected together, and the other end is open. The fixedly connected end of the metal sheet has a sliding hole, and the first stop structure 420 can be slidably connected in the sliding hole. The first stop structure 420 is in a rod shape. By pulling the first stop structure 420 back and forth, the first stop structure 420 can be switched between the first state and the second state. In another embodiment, the fixedly connected end of the metal sheet can have a hinge, and the hinge connects the first stop structure 420. The first stop structure 420 is switched between the first state and the second state by rotating. The open ends of the two metal sheets can be connected by a locking screw and a locking nut, so as to adjust the opening degree of the open end and realize the locking and unlocking of the upper limit structure and the vertical rod.

[0044] The lower limit structure includes a second sliding locking member 510, and the second sliding locking member 510 is connected to the vertical rod so that the second sliding locking member 510 can slide on the vertical rod and be fixed at an expected position. A second stop structure 520 is connected to the second sliding locking member 510.

[0045] Similar to the upper limit structure, the lower limit structure also includes two "Ω"-shaped metal sheets. One end of the two metal sheets is fixedly connected together, and the other end is open. The metal sheets are fixedly connected to the second stop structure 520. The first stop structure 420 is rod-shaped, and the second stop structure 520 is fixed relative to the metal sheets. The open ends of the two metal sheets can be connected by a locking screw and a locking nut, so as to adjust the opening degree of the open ends and realize the locking and unlocking of the lower limit structure and the vertical rod.

[0046] The fixing table 100 includes two side wings 610 respectively arranged on its left and right sides. The first lever 210, the second lever 220 and the vertical rod are all connected to the side wings 610. In the left-right direction, the distance between the side wings 610 and the fixing table 100 is adjustable. After the side wings 610 are adjusted, the distance between the pressing heads 213 of the two first levers 210 changes, so as to adapt to different sizes of the shell 120.

[0047] A connecting plate 620 is fixedly connected to the fixing table 100. The side wings 610 are slidably connected to the connecting plate 620. The connecting plate 620 is provided with a first strip hole extending in the left-right direction, and the side wings 610 are provided with a second strip hole extending in the left-right direction. The shell fixture further includes a locking bolt 630 and a locking nut. The tail end of the locking bolt 630 passes through the first strip hole and the second strip hole in sequence and then is connected to the locking nut.

[0048] The pressing head 213 is detachably connected to the detection end of the pressure sensor 700, which is convenient for replacing the pressing head 213.

[0049] The detection end of the pressure sensor 700 is provided with a dovetail protrusion, and the pressing head 213 is provided with a dovetail groove slidably connected to the dovetail protrusion. The cooperation of the dovetail protrusion and the dovetail groove can make the pressing head 213 stuck on the pressure sensor 700, and the pressure received by the pressing head 213 can be detected by the pressure sensor 700.

[0050] The fixing table 100 has a detachable gasket 110. The gasket 110 has a card slot corresponding to different sizes of the shell 120 for positioning the shell 120. Among them, the gasket 110 is fixed on the fixing table 100 by nuts at the four corners. It can also be fixed by vacuum adsorption and electromagnetic adsorption.

[0051] The lower ends of the first lever 210 and the second lever 220 respectively have a first support structure and a second support structure. The first support structure is hinged to the first lever 210, and the second support structure is hinged to the second lever 220.

[0052] The vertical rod can be welded to the side wings 610.

[0053] The vertical rod can also move up and down relative to the side wing 610. Specifically, the lower end of the vertical rod is threadedly connected to the side wing 610, and the up-and-down movement of the upper limit structure is achieved by rotating the vertical rod. At this time, the metal sheet of the upper limit structure can be welded to the vertical rod.

[0054] The material of the pressure head 213 is rubber, which will not scratch or damage the gold-plated layer of the tube shell 120.

[0055] The specific operation process is as follows:

[0056] a. Replace the corresponding gasket 110 according to the variety of the pressure-welded tube shell 120.

[0057] b. Select and replace the pressure head 213 according to the size of the tube shell 120 or the wear degree of the pressure head 213.

[0058] c. By loosening the locking bolts 630 and the locking nuts, further adjust the relative position of the side wing 610 and the connecting plate 620 so that the pressure head 213 presses on the 1 / 2 to 2 / 3 of the frame of the tube shell 120.

[0059] d. Install the adjusted test tube shell 120 into the card slot of the gasket 110. When the fourth end 222 is pressed down until it is below the upper limit structure, push the first stop structure 420 inward from the outside to prevent the fourth end 222 from moving upward, and then release the fourth end 222. Loosen the locking nut of the upper limit structure. By adjusting the relative height of the first sliding locking member 410 on the vertical rod, change the pressure of the pressure head 213 on the tube shell 120. Observe the display screen of the pressure sensor 700. When the pressure of the pressure head 213 on the tube shell 120 reaches the required value, tighten the locking nut of the upper limit structure. After adjusting the height of the upper limit structure, press down the fourth end 222 until it contacts the second stop structure 520. Loosen the locking nut of the lower limit structure. Observe the real-time pressure display. Move the second sliding locking member 510 and the fourth end 222 upward together until the real-time pressure value reaches the maximum value within the qualified range, then tighten the locking nut of the lower limit structure. Push the first stop structure 420 outward to the release position to make the fourth end 222 move freely upward, release the pressure at the pressure head 213, and take out the adjusted test tube shell 120.

[0060] e. Place the tube shell 120 to be welded into the card slot of the gasket 110. Press down the fourth end 222 until it is below the first sliding locking member 410. Push the first stop structure 420 inward to the closed position, and then move both hands away to start pressure welding.

[0061] f. After the pressure welding is completed, press down the fourth end 222 with both hands, push the first stop structure 420 to the release position to make it move upward, remove the tube shell 120, and prepare for the next pressure welding.

[0062] The welding method provided by the embodiment of the present invention is implemented by using the above-mentioned shell fixture, and includes the following steps:

[0063] S1. Place the adjustment shell 120 in the shell fixture.

[0064] The adjustment shell 120 can be used to adjust the pressure of the fixture on the shell 120 in advance, avoiding damaging the shell 120 to be welded by the fixture. Before placing the adjustment shell 120, the corresponding gasket 110 can be replaced according to the variety of the pressure-welded shell 120. The pressure head 213 can be replaced according to the size of the shell 120 or the wear degree of the pressure head 213. After the adjustment shell 120 is placed, by loosening the locking bolt 630 and the locking nut, the relative position of the side wing 610 and the connecting plate 620 is adjusted, so that the pressure head 213 presses on the frame of the adjustment shell 120 at a position from 1 / 2 to 2 / 3.

[0065] S2. Adjust the up-and-down position of the upper limit structure so that the pressure of the pressure head 213 on the adjustment shell 120 reaches the required value.

[0066] When the fourth end 222 is pressed down until it is below the upper limit structure, the first stop structure 420 is pushed inward from the outside to prevent the fourth end 222 from moving upward, and then the fourth end 222 is released. The locking nut of the upper limit structure is loosened, and by adjusting the relative height of the first sliding locking member 410 on the vertical rod, the pressure of the pressure head 213 on the shell 120 is changed. Observe the display screen of the pressure sensor 700. When the pressure of the pressure head 213 on the shell 120 reaches the required value, tighten the locking nut of the upper limit structure.

[0067] S3. Adjust the first stop structure 420 to the second state; replace the adjustment shell 120 with the shell to be welded.

[0068] Push the first stop structure 420 outward to the release position, so that the fourth end 222 can move freely upward, release the pressure at the pressure head 213, take out the adjustment shell 120, and place the shell to be welded into the fixture.

[0069] S4. Press the fourth end 222 and adjust the first stop structure 420 to the first state, and the fourth end 222 is blocked below by the first stop structure 420. S5. Weld the shell 120 to be welded.

[0070] Press the fourth end 222 downward until it is below the first sliding locking member 410, then push the first stop structure 420 inward to the closed position, move both hands away, and start pressure welding. After the pressure welding is completed, press the fourth end 222 downward with both hands, push the first stop structure 420 to the release position, so that it moves upward, take out the shell 120, and prepare for the next pressure welding.

[0071] The welding method further includes a step performed between step S2 and step S3: pressing the fourth end 222 downward until it contacts the second stop structure 520, releasing the lower limit structure, and moving the lower limit structure together with the fourth end 222 until the pressure of the pressing head 213 on the adjustment tube shell 120 reaches the maximum value within the qualified range, and then fixing the lower limit structure.

[0072] After adjusting the height of the upper limit structure, press the fourth end 222 downward until it contacts the second stop structure 520, loosen the locking nut of the lower limit structure, observe the real-time pressure display, and move the second sliding locking member 510 and the fourth end 222 upward together until the real-time pressure value reaches the maximum value within the qualified range, and then tighten the locking nut of the lower limit structure. The lower limit structure can play a role in protection to prevent excessive pressure from being accidentally applied to the tube shell 120 to be welded.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shell fixture, characterized in that, Comprising: A fixed table (100), with a first clamping assembly and a second clamping assembly respectively arranged on the left and right sides of the fixed table (100), and the first clamping assembly and the second clamping assembly are used to respectively press the tube shell (120) on the fixed table (100); Both the first clamping assembly and the second clamping assembly include: a first lever (210), a second lever (220), a vertical rod and an upper limit structure. The first lever (210) includes a relative first end (211) and a second end (212), and the second lever (220) includes a relative third end (221) and a fourth end (222); the first end (211) is connected with a pressure head (213), and the pressure head (213) is used for press-connecting with the tube shell (120). The third end (221) is located below the second end (212), and a spring (300) is connected between the two; the vertical rod is connected with the fixed table (100), the upper limit structure is connected to the vertical rod, and the position of the upper limit structure in the vertical direction is adjustable; the fourth end (222) is located below the upper limit structure.

2. The cartridge jig according to claim 1, wherein The tube shell fixture further includes a lower limit structure, the lower limit structure is connected to the vertical rod, the position of the lower limit structure in the vertical direction is adjustable, and the fourth end (222) is located between the upper limit structure and the lower limit structure.

3. The cartridge fixture according to claim 1, characterized in that, The first end (211) is connected with a pressure sensor (700), and the detection end of the pressure sensor (700) is connected with a pressure head (213).

4. The cartridge fixture according to claim 2, wherein The upper limit structure includes a first sliding locking member (410), the first sliding locking member (410) is connected to the vertical rod so that the first sliding locking member (410) can slide on the vertical rod and be fixed at an expected position. A first stop structure (420) is movably connected to the first sliding locking member (410). The first stop structure (420) has a first state and a second state. In the first state, the first stop structure (420) is located on the swinging path of the fourth end (222), and in the second state, the first stop structure (420) is located outside the swinging path of the fourth end (222).

5. The cartridge jig according to claim 4, characterized in that, The first stop structure (420) is slidably connected with the first sliding locking member (410).

6. The shell fixture according to claim 4, characterized in that The first stop structure (420) is rotatably connected with the first sliding locking member (410).

7. The cartridge jig according to claim 4, characterized in that, The lower limit structure includes a second sliding locking member (510), the second sliding locking member (510) is connected to the vertical rod so that the second sliding locking member (510) can slide on the vertical rod and be fixed at an expected position, and a second stop structure (520) is connected to the second sliding locking member (510).

8. The shell fixture according to claim 1, wherein The fixed table (100) includes two side wings (610) respectively arranged on its left and right sides. The first lever (210), the second lever (220) and the vertical rod are all connected to the side wings (610); in the left-right direction, the distance between the side wings (610) and the fixed table (100) is adjustable.

9. The shell fixture according to claim 8, wherein, A connecting plate (620) is fixedly connected to the fixed table (100). The side wing (610) is slidably connected to the connecting plate (620). A first elongate hole extending in the left-right direction is provided on the connecting plate (620), and a second elongate hole extending in the left-right direction is provided on the side wing (610). The tube shell clamp further includes a locking bolt (630) and a locking nut. The tail end of the locking bolt (630) sequentially passes through the first elongate hole and the second elongate hole and then is connected to the locking nut.

10. The cartridge jig according to claim 3, characterized in that, The pressing head (213) is detachably connected to the detection end of the pressure sensor (700).

11. The cartridge fixture according to claim 10, wherein, A dovetail protrusion is provided on the detection end of the pressure sensor (700), and a dovetail groove slidably connected to the dovetail protrusion is provided on the pressing head (213).

12. A welding method, characterized in that, Implemented by using the tube shell clamp according to claim 7, including the steps of: S1. Place a calibration test tube shell (120) in the tube shell clamp. S2. Adjust the vertical position of the upper limit structure so that the pressure of the pressing head (213) on the calibration test tube shell (120) reaches the required value, and fix the upper limit structure to the vertical rod. S3. Adjust the first stop structure (420) to the second state; replace the calibration test tube shell (120) with a tube shell to be welded (120). S4. Press the fourth end (222) and adjust the first stop structure (420) to the first state. The fourth end (222) is stopped below by the first stop structure (420). S5. Weld the tube shell to be welded (120).

13. The welding method according to claim 12, characterized in that, The welding method further includes a step carried out between step S2 and step S3: Press the fourth end (222) downward until it contacts the second stop structure (520), release the lower limit structure, and move the lower limit structure together with the fourth end (222) until the pressure of the pressing head (213) on the calibration test tube shell (120) reaches the maximum value within the qualified range, and then fix the lower limit structure.

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