Thin-wall gas cylinder inner container machining auxiliary tool and machining method
By designing elastic jacket auxiliary tools with multiple processing grooves, the problem of difficulty in fixing and alignment during welding of thin-walled gas cylinder inner tank is solved, stable fixing and efficient welding of welded parts are achieved, and welding quality and efficiency are improved .
Patent Information
- Application Number
- CN202411480298.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-01-14
AI Technical Summary
During the assembly and welding of thin-walled gas cylinder inner tank, there are problems such as difficult to fix the assembly auxiliary tools, difficulty in aligning the weld position, low welding strength, and difficulty in disassembly after spot welding.
An elastic jacket auxiliary tool including multiple processing grooves is designed to fix the cylinder port and the tube, and to achieve the alignment and stable fixation of the welds through laser welding to ensure convenient position alignment and subsequent disassembly during welding.
It effectively solves the problems of position alignment and low strength during welding of thin-walled gas cylinder inner tank, realizes stable fixing and disassembly of welded parts, and improves welding quality and efficiency.
Smart Images
Figure CN119304495A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the processing of a gas cylinder liner, and in particular to a processing aid and a processing method for a thin-walled gas cylinder liner. Background Art
[0002] Composite gas cylinder structure Figure 1 As shown, it is made of a metal cylinder liner and a carbon fiber composite material wrapped together. The metal cylinder liner plays a sealing role, and the carbon fiber composite material layer bears the cylinder pressure. Due to strict requirements on the outer dimensions of the cylinder, in order to increase the bursting pressure of the cylinder, the cylinder liner wall thickness is designed to be 0.7mm and the length is 710mm. The thin-wall structure brings great difficulty to the processing of the cylinder. The details are as follows: 1. The cylinder liner adopts the integral forming method, the cylinder wall thickness and the interface wall thickness have a large deviation, and the bottle mouth part is difficult to spin. Even if the difficulty of integral spinning is overcome, the interface size after forming is difficult to process due to the thin wall of the cylinder liner.
[0003] 2. The inner liner of the gas cylinder adopts a split welding structure, such as Figure 2 As shown, it is welded by two gas cylinder mouths 1 and pipes 2. Due to the thin wall thickness, a processing allowance is left before welding, and the processing after welding is difficult. After all the dimensions are processed, welding has high requirements for welding, which are specifically manifested as follows: First, the weld position is not aligned with the interface. Once the weld position of the gas cylinder mouth 1 and the pipe 2 are not coaxial, it will affect the welding thickness in the wall thickness direction and reduce the welding strength; second, it cannot be reliably fixed during the welding process, and the gas cylinder mouth 1 and the pipe 2 are prone to relative displacement during welding. Summary of the invention
[0004] In order to solve the problem that the thin-walled gas cylinder liner assembly auxiliary body has a large volume, heavy weight and difficult operation, the present invention provides a thin-walled gas cylinder liner processing auxiliary tool and a processing method.
[0005] The thin-walled gas cylinder liner processing auxiliary tool described in the present invention is implemented by the following technical solution: a thin-walled gas cylinder liner processing auxiliary tool includes an elastic jacket, and both ends of the elastic jacket are provided with multiple processing grooves, and the multiple processing grooves at each end are evenly distributed around the elastic jacket at equal intervals in the axial direction.
[0006] The elastic jacket is used to clamp the two gas cylinder ports and the pipe for easy welding; the processing groove is used to leave a spot welding position, which is convenient for the initial positioning of the gas cylinder port and the pipe after spot welding, and then the elastic jacket can be removed to perform the final welding of the gas cylinder port and the pipe. The elastic jacket with openings at both ends is also convenient for disassembly after spot welding (just pull out the elastic jacket directly).
[0007] Furthermore, the processing groove is in the shape of an elongated strip and runs parallel to the axial direction of the elastic jacket. The processing groove at each end extends from the end portion to the other end but does not penetrate the other end portion (but is close to the end portion).
[0008] Furthermore, the processing grooves at both ends are staggered at a certain angle.
[0009] Furthermore, there are four processing grooves at both ends, and the processing grooves at both ends are staggered at an angle of 45 degrees.
[0010] Furthermore, the non-opening end of the processing groove is rounded.
[0011] The thin-walled gas cylinder liner processing method of the present invention comprises the following steps: 1) the thin-walled gas cylinder liner adopts a split welding structure, which is welded by two gas cylinder mouths and a tube; 2) The outer diameter of the cylinder mouth is the same as that of the pipe, and it is processed to the finished size before welding; 3) To ensure that the gas cylinder mouth and the pipe weld are aligned, a thin-walled gas cylinder liner processing aid is used, in which the inner diameter of the elastic jacket is equal to or slightly smaller than the outer diameter of the gas cylinder mouth and the pipe; 4) Before welding, use an elastic jacket to fix the mouth of the gas cylinder and the pipe. Since the outer diameter of the elastic jacket is equal to or slightly smaller than the mouth of the gas cylinder and the pipe, the elastic jacket will firmly fix the mouth of the gas cylinder and the pipe during the assembly process and ensure that the weld position is aligned; 5) Spot weld the assembled gas cylinder mouth and the pipe symmetrically at the processing groove position; 6) Take out the elastic jacket, fix the spot-welded gas cylinder liner on the welding equipment by clamping and pushing with the machine tool, and complete the welding of the gas cylinder liner.
[0012] Furthermore, the welding in step 6) is performed by laser welding.
[0013] Compared with the prior art, the invention has the following beneficial effects: 1) The method of directly welding the thin-walled gas cylinder liner solves the problem of being unable to form an integral whole.
[0014] 2) An elastic jacket is designed to solve the problem of accurate positioning of welds on thin-walled parts.
[0015] 3) The symmetrical structure of the slotted elastic jacket is fully utilized to solve the problem of disassembly after spot welding (moderate deformation is allowed for easy disassembly). The 4-point symmetrical spot welding ensures the stability of the welded parts after spot welding. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 Schematic diagram of the composite gas cylinder structure.
[0017] Figure 2 Schematic diagram of the gas cylinder liner structure.
[0018] Figure 3 Schematic diagram of the axial structure of the elastic jacket.
[0019] Figure 4 for Figure 3 AA section view in.
[0020] Figure 5 for Figure 4 BB section view in.
[0021] 1-gas cylinder mouth, 2-tube, 3-elastic jacket, 4-weld, 5-gas cylinder liner, 6-carbon fiber layer; 31- Processing tank. DETAILED DESCRIPTION
[0022] Embodiment 1 A thin-walled gas cylinder liner processing auxiliary tool comprises an elastic jacket 3 (most steel materials can be used, such as stainless steel), both ends of the elastic jacket 3 are provided with a plurality of processing grooves 31 (the setting of the processing grooves itself makes the jacket have certain deformation characteristics), and the plurality of processing grooves 31 at each end are evenly distributed around the elastic jacket 3 axially at equal intervals.
[0023] Example 2 Combination Figure 3-5 As shown, the processing groove 31 is in the shape of a long strip, and its direction is parallel to the axial direction of the elastic jacket 3. The processing groove 31 at each end extends from the end to the other end, but does not penetrate the other end. The processing grooves 31 at both ends are staggered at a certain angle. There are four processing grooves 31 at both ends, and the processing grooves are the same length. The processing grooves 31 at both ends are staggered at 45 degrees. The non-open end of the processing groove is rounded to facilitate hooking the processing groove with a tool and pulling it outward.
[0024] Embodiment 3 A method for processing a thin-walled gas cylinder liner comprises the following steps: 1) The gas cylinder liner adopts a split welding structure, which is welded by two gas cylinder mouths 1 and a tube 2. To reduce welding stress, laser welding is used for welding.
[0025] 2) The outer diameter of the cylinder mouth 1 is the same as that of the tube 2 and they are processed to the finished size before welding.
[0026] 3) In order to ensure that the weld position of the cylinder mouth 1 and the pipe 2 is aligned, an elastic jacket 3 is designed, such as Figure 3-5 As shown, the elastic jacket 3 has four grooves at both ends, and the four grooves are evenly distributed, with an angle of 45 0 The inner diameter of the elastic jacket 3 is equal to or slightly smaller than the outer diameters of the gas cylinder mouth 1 and the tube 2 .
[0027] 4) Before welding, use the elastic jacket 3 to fix the gas cylinder mouth 1 and the tube 2. Since the outer diameter of the elastic jacket 3 is equal to or slightly smaller than the gas cylinder mouth 1 and the tube 2, the elastic jacket will firmly fix the gas cylinder mouth 1 and the tube 2 during the assembly process and ensure that the weld position is aligned.
[0028] 5) Spot weld the assembled gas cylinder mouth 1 and pipe 2 symmetrically at the four slotted positions. The slotted positions should be selected to ensure that the elastic jacket can be removed smoothly. The end of the machined groove on the jacket has a rounded corner ( Figure 4 ,5 As shown), the processing groove is located at the portion where the outer diameter of the gas cylinder mouth 1 is reduced, so that it is convenient to use a tool to hook the processing groove to take out the elastic jacket.
[0029] 6) Fix the spot-welded gas cylinder liner on the laser welding equipment by clamping and pushing to complete the welding of the gas cylinder liner.
Claims
1. A thin-walled gas cylinder liner processing auxiliary tool, comprising an elastic jacket (3), characterized in that: Both ends of the elastic jacket (3) are provided with a plurality of machining grooves (31), and the plurality of machining grooves (31) at each end are evenly spaced around the elastic jacket (3) in the axial direction.
2. A thin-walled gas cylinder liner processing auxiliary tool as claimed in claim 1, characterized in that: The processing groove (31) is in the shape of an elongated strip and runs parallel to the axial direction of the elastic jacket (3). The processing groove (31) at each end extends from the end portion to the other end but does not penetrate the other end portion.
3. A thin-walled gas cylinder liner processing auxiliary tool as claimed in claim 2, characterized in that: The processing grooves (31) at both ends are staggered at a certain angle.
4. A thin-walled gas cylinder liner processing auxiliary tool as claimed in claim 3, characterized in that: There are four processing grooves (31) at both ends, and the processing grooves (31) at both ends are staggered at an angle of 45 degrees.
5. A thin-walled gas cylinder liner processing auxiliary tool as claimed in claim 3, characterized in that: The non-open end of the processing groove (31) is rounded.
6. A method for processing a thin-walled gas cylinder liner, characterized in that: The method comprises the following steps: 1) the inner liner of the thin-walled gas cylinder adopts a split welding structure, which is welded by two gas cylinder mouths (1) and a tube (2); 2) The outer diameter of the cylinder mouth (1) and the tube (2) are the same and are processed to the finished size before welding; 3) To ensure that the position of the weld seam (4) of the gas cylinder mouth (1) and the tube (2) is aligned, a thin-walled gas cylinder liner processing auxiliary tool as described in any one of claims 1 to 5 is used, wherein the inner diameter of the elastic jacket (3) is equal to or slightly smaller than the outer diameter of the gas cylinder mouth (1) and the tube (2); 4) Before welding, the gas cylinder mouth (1) and the tube (2) are fixed with an elastic jacket (3). Since the outer diameter of the elastic jacket (3) is equal to or slightly smaller than the gas cylinder mouth (1) and the tube (2), the elastic jacket (3) will firmly fix the gas cylinder mouth (1) and the tube (2) during the assembly process and ensure that the position of the weld (4) is aligned; 5) symmetrically spot-welding the assembled gas cylinder mouth (1) and the tube (2) at the position of the processing groove (31); 6) Take out the elastic jacket (3), and fix the spot-welded gas cylinder liner on the welding equipment by clamping and pushing with the machine tool, thus completing the welding of the gas cylinder liner.
7. A method for processing a thin-walled gas cylinder liner as claimed in claim 6, characterized in that: The welding in step 6) is performed by laser welding.