Hydrogen cylinder pipe fixed-length cutting device and cutting method thereof

Abstract

The application discloses a hydrogen cylinder pipe fixed-length cutting equipment, which comprises a processing table, a clamping device axially slidingly arranged on the processing table and used for clamping a hydrogen cylinder pipe, and a laser cutting head arranged on the processing table and used for cutting the hydrogen cylinder pipe, a rotating mechanism arranged on the clamping device and used for driving the hydrogen cylinder pipe to rotate, and a detection device used for detecting a highest critical point of a radially outward protruding end portion of the hydrogen cylinder pipe, wherein an axial distance from the highest critical point of the radially outward protruding end portion of the hydrogen cylinder pipe to a cutting point of the laser cutting head is subtracted by a reserved amount of the radially outward protruding end portion of the hydrogen cylinder pipe to serve as a moving amount of the clamping device in a direction towards the laser cutting head, and a length of the radially outward protruding end portion of the hydrogen cylinder pipe after cutting is kept fixed. The hydrogen cylinder pipe fixed-length cutting equipment has simple structure and reasonable design, and the radially outward protruding end portion of the hydrogen cylinder pipe is reserved through the detection device, so that the thickness of the hydrogen cylinder pipe at a cutting position is not easy to be lower than a set value due to spinning, the service life and safety of the hydrogen cylinder pipe are improved, and the peeling strength of a carbon fiber layer is improved.

Description

Technical Field

[0001] This invention relates to the technical field of cutting equipment, specifically to a hydrogen cylinder tube fixed-length cutting device and its cutting method. Background Technology

[0002] The hydrogen cylinder tube length-cutting equipment is a high-precision device specifically designed for manufacturing high-pressure hydrogen cylinder tube blanks. Through automated machining, it precisely cuts tubular blanks to a preset length, ensuring the cut end faces meet the geometric accuracy and material integrity requirements of the hydrogen cylinder's pressure-bearing structure. Its core mission is to provide defect-free semi-finished products for subsequent processes such as spinning, heat treatment, and other finishing steps.

[0003] The hydrogen cylinder length-cutting equipment includes a cutting head located on a processing table. A clamping device holds the tube and drives the cutting head to a preset cutting position for cutting. However, when the cut tube needs to be spun to form a bottle neck structure, the tube wall metal is subjected to axial compressive force and radial expansion force during the spun process, causing plastic deformation in the thickness direction, which can lead to permanent deformation or fracture failure. Furthermore, during subsequent carbon fiber winding, insufficient wall thickness and geometric instability of the tube result in unbalanced tension distribution and voids at the resin-metal interface, leading to a decrease in the peel strength of the carbon fiber winding layer. Summary of the Invention

[0004] The purpose of this invention is to provide a hydrogen cylinder tube fixed-length cutting device and cutting method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A hydrogen cylinder tube length-cutting device includes a processing table, a clamping device axially slidably mounted on the processing table for clamping the hydrogen cylinder tube, and a laser cutting head mounted on the processing table for cutting the hydrogen cylinder tube. The clamping device is equipped with a rotating mechanism for driving the hydrogen cylinder tube to rotate, and also has a detection device for detecting the highest critical point of radial outward convexity at the end of the hydrogen cylinder tube. The axial distance from the highest critical point of radial outward convexity at the end of the hydrogen cylinder tube to the cutting point of the laser cutting head minus the allowance of the radial outward convex section at the end of the hydrogen cylinder tube is used as the movement amount of the clamping device toward the laser cutting head, so as to keep the outward convex length of the end of the cut hydrogen cylinder tube fixed.

[0007] Preferably, the detection device includes an abutment rod for abutting against the side wall of the hydrogen cylinder tube and an optical communication probe connected to the abutment rod. The optical communication probe is axially slidably disposed on the processing table. The hydrogen cylinder tube fixed-length cutting equipment also has a controller. The controller receives information sent by the optical communication probe about the position of the highest critical point of radial outward convexity at the end of the hydrogen cylinder tube, calculates the movement of the clamping device accordingly, and controls the clamping device to move accordingly.

[0008] Preferably, the clamping device includes a base slidably disposed on the processing table, two clamping units slidably disposed on the base, and a first driving mechanism for driving the clamping units to move toward each other to clamp the hydrogen cylinder tube. The clamping unit is provided with a plurality of rollers for abutting against the hydrogen cylinder tube, and the rotating mechanism is located on the clamping unit and is used to drive one of the rollers to rotate.

[0009] Preferably, each of the clamping units includes a vertical plate slidably connected to the base and two clamping arms fixed to the vertical plate, and each clamping arm has two rollers.

[0010] Preferably, the clamping device further includes a lifting mechanism for lifting the hydrogen cylinder tube. The lifting mechanism includes a support block for supporting the hydrogen cylinder tube, a lifting plate for carrying the support block, a second driving mechanism for driving the lifting plate to move up and down, and a guiding mechanism for guiding the support block to move up and down. The guiding mechanism includes a guide sleeve and a guide rod slidably disposed in the guide sleeve. The guide sleeve is fixed to the base, and the upper end of the guide rod is fixed to the lifting plate.

[0011] Preferably, the processing table is provided with a third driving mechanism for driving the hydrogen cylinder tube to move. The third driving mechanism includes a rack connected to the bottom of the base, a gear meshing with the rack, and a third motor. The driving end of the third motor is fixed coaxially with the gear, and the third motor is electrically connected to the controller.

[0012] Preferably, the laser cutting head includes a support that is slidably disposed on the processing table in a vertical direction, a cutting head, and a mounting base. The cutting head is fixed to the mounting base, and the mounting base is elastically connected to the support through an elastic support component. The mounting base is provided with at least one abutment portion, the bottom end of which is lower than the bottom end of the cutting head, for abutting against the surface of the hydrogen cylinder to be cut during the cutting process to maintain a constant distance between the cutting head and the surface of the hydrogen cylinder to be cut.

[0013] Preferably, the elastic support component includes a slider slidably disposed on the bracket, a guide rod, and an elastic element that elastically supports the slider in its sliding direction. The mounting base is fixed to the slider, the slider is slidably disposed on the guide rod, the end of the guide rod is connected to the bracket, and the elastic element includes an upper spring and a lower spring. The bracket is fixed with an upper spring seat and a lower spring. The top of the upper spring is supported by the upper spring seat, the bottom of the upper spring abuts against the slider, the bottom of the lower spring is supported by the lower spring seat, and the top of the lower spring abuts against the slider.

[0014] Preferably, the processing table is provided with a hanging arm and a lifting component for driving the support to slide. The lifting component is fixed to the hanging arm, and the support slides relative to the hanging arm.

[0015] This invention also discloses a method for cutting hydrogen cylinder tubing, comprising the following steps:

[0016] S1. After raising and lowering the hydrogen cylinder tube to the set height, use the clamping device to clamp the hydrogen cylinder tube.

[0017] S11. After the hydrogen cylinder tube is transferred to the top of the support block, the hydrogen cylinder tube moves with the support block and the lifting plate through the lifting mechanism. Through the guiding mechanism, the hydrogen cylinder tube is lifted vertically until the hydrogen cylinder tube moves to the set height.

[0018] S12. After the hydrogen cylinder tube moves to the set height, the clamping arms on both sides of the hydrogen cylinder tube move in a direction that approaches each other through the first drive mechanism until the rollers on the clamping arms abut against the side wall of the hydrogen cylinder tube, thereby clamping the hydrogen cylinder tube.

[0019] S2. Use a detection device to detect the position of the highest critical point of radial outward bulge at the end of the hydrogen cylinder tube;

[0020] S21. The end of the abutment rod abuts against the side wall of the hydrogen cylinder tube;

[0021] S22. Move the optical communication probe along the axial direction of the processing table so that the abutment rod moves synchronously. When the end of the abutment rod moves to the position of the highest critical point of radial outward convexity at the end of the hydrogen cylinder tube, the optical communication probe records the position.

[0022] S3. Calculate the amount of movement of the clamping device toward the laser cutting head: The axial distance from the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube to the cutting point of the laser cutting head minus the allowance of the radial outward convex section at the end of the hydrogen cylinder tube is used as the amount of movement of the clamping device toward the laser cutting head.

[0023] S31. Move the optical communication probe to record the axial distance from the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube to the cutting point of the laser cutting head and the allowance of the radial outward convex section at the end of the hydrogen cylinder tube.

[0024] S32. Subtracting the two gives the amount of movement of the clamping device toward the laser cutting head.

[0025] S4, axial sliding clamping device, which moves the clamping device toward the laser cutting head by the specified amount;

[0026] S41. Through the second drive mechanism, the motor starts and drives the gear to rotate synchronously, thereby driving the rack to move synchronously. The rack moves synchronously and drives the base to move synchronously, which in turn drives the clamping arm and hydrogen cylinder to move synchronously until the clamping arm and hydrogen cylinder are moved toward the laser cutting head by the amount of movement.

[0027] S5. Use a laser cutting head to cut the hydrogen cylinder tube. During the cutting process, the rotating mechanism of the clamping device drives the hydrogen cylinder tube to rotate, completing the fixed-length cutting of the hydrogen cylinder tube.

[0028] S51. Adjust the lifting components to raise and lower the bracket, mounting base, and cutting head vertically until the contact part on the mounting base contacts the hydrogen cylinder tube.

[0029] S52. When the roundness of the hydrogen cylinder tube surface is uneven, the abutment part at the bottom of the mounting base is always in contact with the hydrogen cylinder tube through the elastic support component, so that the distance between the cutting head on the mounting base and the hydrogen cylinder tube is constant.

[0030] S53. When the cutting head cuts the hydrogen cylinder tube, the roller rotates synchronously with the hydrogen cylinder tube through the rotating mechanism on the clamping arm, thereby completing the cutting of the hydrogen cylinder tube.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. This hydrogen cylinder tube length-cutting equipment includes a clamping device, a laser cutting head, a rotating mechanism, and a detection device on a processing table. When cutting the hydrogen cylinder tube, the detection device determines the length of the hydrogen cylinder tube and moves it along the length of the processing table by a set amount, thereby reserving a radially outward convex section at the end of the hydrogen cylinder tube. This prevents the thickness of the hydrogen cylinder tube from falling below the set value due to subsequent spinning, ensuring that the actual stress on the tube wall does not exceed the material yield strength. Consequently, the hydrogen cylinder tube is less prone to deformation or breakage, thus improving its service life and safety. Furthermore, during subsequent carbon fiber winding, gaps are less likely to exist between the carbon fiber and the hydrogen cylinder tube, improving the peel strength of the carbon fiber layer.

[0033] 2. The hydrogen cylinder tube fixed length cutting equipment is equipped with a lifting mechanism, a support block supports the hydrogen cylinder tube, and a rotating mechanism drives the lifting plate to lift and lower, which in turn drives the support block to lift and lower synchronously, thereby driving the hydrogen cylinder tube to lift and lower synchronously. A guiding mechanism guides the hydrogen cylinder tube so that the hydrogen cylinder tube lifts and lowers in the vertical direction. When the hydrogen cylinder tube is lifted and lowered to a set height, the clamping arm moves in the direction close to the hydrogen cylinder tube through the first driving mechanism, thereby clamping the hydrogen cylinder tube.

[0034] 3. The hydrogen cylinder tube length cutting device is equipped with a bracket, a cutting head, a mounting base and an elastic support component. The bottom of the mounting base is always in contact with the hydrogen cylinder tube, so that the distance between the cutting head and the hydrogen cylinder tube is constant, thereby cutting the hydrogen cylinder tube. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is a partial structural schematic diagram of the present invention, mainly showing the clamping unit;

[0037] Figure 3 This is a partial structural diagram of the present invention, mainly showing the lifting mechanism;

[0038] Figure 4 This is a partial structural schematic diagram of the present invention, mainly showing the third drive mechanism;

[0039] Figure 5 This is a partial structural schematic diagram of the present invention, mainly showing the lifting component;

[0040] Figure 6 This is a partial structural schematic diagram of the present invention, mainly showing the elastic element;

[0041] Figure 7 This is a partial structural schematic diagram of the present invention, mainly showing the optical communication probe.

[0042] In the diagram: 1. Processing table; 11. Hydrogen cylinder tube; 12. Controller; 13. Base; 14. Hanging arm; 15. Support plate; 2. Rotating mechanism; 21. Second motor; 22. Reduction mechanism; 3. Detection device; 31. Abutment rod; 32. Optical communication probe; 4. Clamping unit; 41. Roller; 42. Vertical plate; 43. Clamping arm; 5. First drive mechanism; 51. First motor; 52. Bidirectional screw; 6. Lifting mechanism; 61. Support block; 62. Lifting plate; 63. Second drive mechanism; 64. Guide mechanism; 641. Guide sleeve; 642. Guide rod; 7. Third drive mechanism; 71. Rack; 72. Gear; 73. Third motor; 81. Bracket; 82. Cutting head; 83. Mounting base; 84. Abutment part; 85. Connecting plate; 86. Lifting component; 87. Slide rail; 91. Slider; 92. Guide rod; 93. Elastic element; 931. Upper spring; 932. Lower spring; 94. Upper spring seat; 95. Lower spring seat. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integrated connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0047] Example 1

[0048] Please see Figure 1-7 As shown, the present invention provides a technical solution for a hydrogen cylinder tube fixed-length cutting device:

[0049] A fixed-length cutting device for hydrogen cylinder tubes 11 includes a processing table 1, on which a clamping device is installed. The clamping device includes a base 13 slidably disposed on the processing table 1, two clamping units 4 slidably disposed on the base 13, a first driving mechanism 5, and a rotating mechanism 2. The two clamping units 4 are respectively located on both sides of the base 13 and slidably connected to the base 13. Each clamping unit 4 includes a vertical plate 42 and two clamping arms 43. The bottom of the vertical plate 42 is slidably connected to the base 13, and the two clamping arms 43 are located on the vertical plate 42. On the same side of plate 42 and fixedly connected to vertical plate 42, each clamping arm 43 is equipped with several rollers 41. Specifically, each clamping arm 43 has two rollers 41, and the two rollers 41 are distributed in the vertical direction. Each roller 41 is rotatably connected to the side wall of clamping arm 43. The other side of roller 41 is used to abut against the side wall of hydrogen cylinder tube 11. The length of hydrogen cylinder tube 11 is in the range of 2400mm to 6700mm, and the diameter of tube is in the range of 300mm to 650mm.

[0050] The first drive mechanism 5 includes a first motor 51 and a bidirectional screw 52. The first motor 51 is fixedly connected to the base 13. The output shaft of the first motor 51 is coaxially fixedly connected to the end of the bidirectional screw 52. The two ends of the horizontally arranged bidirectional screw 52 are threaded through the bottom of the vertical plate 42.

[0051] The rotating mechanism 2 includes a second motor 21 and a reduction mechanism 22. The second motor 21 is connected to the reduction mechanism 22. The output shaft of the reduction mechanism 22 is connected to one of the rollers 41, so that the roller 41 rotates with the second motor 21 and the reduction mechanism 22, thereby causing the hydrogen cylinder tube 11 that abuts against the roller 41 to rotate synchronously.

[0052] Support plates 15 and lifting mechanisms 6 for raising hydrogen cylinder pipe 11 are installed on both sides of the base 13. The horizontally arranged support plates 15 are located on both sides of the base 13 and are fixedly connected to the base 13. The lifting mechanism 6 includes a second drive mechanism 63, a lifting plate 62 and a support block 61. The second drive mechanism 63 includes a second motor or electric cylinder. The second drive mechanism 63 is fixedly connected to the base 13. The output end of the second drive mechanism 63 passes through the support plate 15 and is fixedly connected to the bottom of the lifting plate 62. Specifically, the electric cylinder has a thrust of 15KN, a stroke of 350mm, and a base plate thickness of 40mm, providing sufficient load-bearing strength and rigidity. The top of the horizontally positioned lifting plate 62 is fixedly connected to the bottom of the support block 61. Each lifting plate 62 has two support blocks 61, and the top of each support block 61 is provided with a support groove that abuts against the hydrogen cylinder pipe 11. The support groove is inclined, so that the two support blocks 61 on the same lifting plate 62 are V-shaped. The center distance between the support blocks 61 on both sides of the hydrogen cylinder pipe 11 is 2140mm. Abutment parts made of nylon material are installed on the support blocks 61. Each support plate 15 is equipped with a guide mechanism 64 for guiding the support block 61 to move up and down. There are two guide mechanisms 64, which are located on both sides of the second drive mechanism 63. Each guide mechanism 64 includes a guide sleeve 641 and a guide rod 642. The top of the vertically positioned guide sleeve 641 is fixedly connected to the bottom of the support plate 15, and the top of the vertically positioned guide rod 642 is fixedly connected to the bottom of the lifting plate 62. The bottom of the guide rod 642 passes through the guide sleeve 641 and is slidably connected to the inner wall of the guide sleeve 641.

[0053] The operator activates the second drive mechanism 63. The output shaft of the second drive mechanism 63 drives the lifting plate 62 and the support block 61 to rise and fall. Through the guide rod 642 and the guide sleeve 641, the lifting plate 62 rises and falls vertically, which in turn drives the support block 61 to rise and fall vertically, thus causing the hydrogen cylinder tube 11 to rise and fall vertically. When the hydrogen cylinder tube 11 is transported to the set height, the operator activates the first motor 51. The output shaft of the first motor 51 rotates, driving the bidirectional screw 52 to rotate synchronously, which in turn drives the vertical plates 42 on both sides of the base 13 to move closer to each other, which in turn drives the clamping arms 43 on both sides of the hydrogen cylinder tube 11 to move synchronously until the rollers 41 on the clamping arms 43 abut against the side wall of the hydrogen cylinder tube 11, thus clamping the hydrogen cylinder tube 11. When cutting the hydrogen cylinder tube 11, the operator activates the rotating mechanism 2. Through the second motor 21 and the reduction mechanism 22, the rollers 41 rotate, driving the hydrogen cylinder tube 11 to rotate synchronously, facilitating the cutting process of the hydrogen cylinder tube 11.

[0054] The processing table 1 is equipped with a detection device 3, a controller 12, and a third drive mechanism 7 for moving the drive base 13. The detection device 3 includes an abutment rod 31 for abutting against the side wall of the hydrogen cylinder tube 11 and an optical communication probe 32 connected to the abutment rod 31. The optical communication probe 32 is axially slidably disposed on the processing table 1. Specifically, the optical communication probe 32 is an HCL-0300 optical communication probe 32, which moves along the axial direction of the hydrogen cylinder tube 11. The controller 12 receives information from the optical communication probe 32 regarding the position of the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube 11, calculates the movement amount of the clamping device accordingly, and controls the clamping device to move accordingly. Specifically, the movement amount of the clamping device and the hydrogen cylinder tube 11 toward the laser cutting head 82 is equal to the axial distance from the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube 11 to the cutting point of the laser cutting head 82 minus the allowance of the radial outward convex section at the end of the hydrogen cylinder tube 11. The third drive mechanism 7 includes a rack 71 fixedly connected to the bottom of the base 13, a gear 72 meshing with the rack 71, and a third motor 73 fixed to the processing table 1. The drive end of the third motor 73 is coaxially fixed with the gear 72. The third motor 73 is electrically connected to the controller 12, thereby causing the clamping device and the hydrogen cylinder tube 11 to move accordingly in the direction close to the laser cutting head 82.

[0055] The processing table 1 is also equipped with a laser cutting head 82 for cutting hydrogen cylinder tubes 11. Specifically, the laser cutting head 82 includes a hanging arm 14, a lifting component 86, a slide rail 87, and a bracket 81 located within the processing table 1. The hanging arm 14 is fixedly connected to the processing table 1. The lifting component 86 includes a servo electric push cylinder. The fixed end of the servo electric push cylinder is fixedly connected to the hanging arm 14, and the output end of the servo electric push cylinder is fixedly connected to the bracket 81. Specifically, the servo electric push cylinder uses a domestic brand (Diyue) 0.5KW servo motor, and is equipped with a speed ratio lead of 4 for the lead screw 10. The push cylinder stroke is 300mm, which can flexibly cut products of different diameter specifications. At the same time, two 45mm specification linear guides are provided to ensure sufficient rigidity and stability of the entire mechanism during the cutting process. The bracket 81 is slidably connected to the processing table 1 through the slide rail 87. The support bracket 81, as the main load-bearing structure of the cutting power component, is made of 40mm thick steel plate. The support bracket 81 is connected to the processing table 1 by 16 M20 bolts with a strength grade of 10.9 through 4 connecting blocks.

[0056] The bracket 81 is equipped with an elastic support component, a connecting plate 85, a mounting base 83, and a cutting head 82. The elastic support component includes an upper spring seat 94, a guide rod 92, a slider 91, and an elastic element 93. The side wall of the upper spring seat 94 is fixedly connected to the bracket 81. The guide rod 92 is located at the bottom of the upper spring seat 94 and is fixedly connected to the upper spring seat 94. The horizontally arranged slider 91 is sleeved on the guide rod 92 and is slidably connected to the guide rod 92, so that the slider 91 moves along the axial direction of the guide rod 92. The elastic element 93 includes an upper spring 931. The vertically arranged upper spring 931 is sleeved on the guide rod 92. The top of the upper spring 931 is fixedly connected to the bottom of the upper spring seat 94, and the bottom of the upper spring 931 abuts against the top of the slider 91. The side wall of the vertically arranged connecting plate 85 is fixedly connected to the slider 91, and the other side of the connecting plate 85 is fixedly connected to the side wall of the mounting base 83. The bottom of the mounting base 83 is fixedly connected to the cutting head 82, which faces the hydrogen cylinder tube 11 at the bottom of the mounting base 83. Specifically, the cutting head 82 uses a 12KW laser head and is equipped with a water cooling system and a dust collection system to absorb pollutants such as smoke, dust, and odors generated during cutting, effectively improving the working environment, ensuring equipment operation, and thus guaranteeing safety. At least one abutment part 84 is installed on the mounting base 83. The bottom end of the abutment part 84 is lower than the bottom end of the cutting head 82, and the bottom end of the abutment part 84 abuts against the hydrogen cylinder tube 11. When there is only one abutment part 84, the abutment part 84 is located on the side of the mounting base 83 closest to the hydrogen cylinder tube 11, so that after the hydrogen cylinder tube 11 is cut, the abutment part 84 can still abut against the hydrogen cylinder tube 11, thereby improving the stability of the mounting base 83 and the abutment part 84, making it difficult for the cutting head 82 to move arbitrarily; when there are multiple abutment parts 84, the abutment parts 84 are distributed along the axial direction of the hydrogen cylinder tube 11, thereby supporting the mounting base 83 and the cutting head 82, so that the distance between the cutting head 82 and the hydrogen cylinder tube 11 is constant. Each abutment part 84 includes a roller, a ball, or a sliding block.

[0057] A lower spring seat 95 is also installed on the bracket 81. The lower spring seat 95 is fixedly connected to the bracket 81, and the top of the lower spring seat 95 is fixedly connected to the bottom of the guide rod 92. The elastic support component also includes a lower spring 932. The top of the lower spring 932 abuts against the bottom of the slider 91, and the bottom of the lower spring 932 is fixedly connected to the lower spring seat 95.

[0058] The operator transfers the hydrogen cylinder tube 11 to the processing table 1 and moves it along the direction close to the cutting head 82. After the hydrogen cylinder tube 11 is transferred to the set position, the lifting component 86 is activated. The output end of the lifting component 86 drives the bracket 81 to rise and fall, thereby driving the elastic support component, the mounting base 83 and the contact part 84 to rise and fall synchronously until the contact part 84 contacts the hydrogen cylinder tube 11. Then the cutting head 82 is activated and cuts the hydrogen cylinder tube 11. When the surface of the hydrogen cylinder tube 11 is not uniform in roundness, i.e., locally concave or convex, when the hydrogen cylinder tube 11 is locally concave, the mounting base 83 moves synchronously under the elastic force of the upper spring 931 until the abutment part 84 on the mounting base 83 abuts against the concave part of the hydrogen cylinder tube 11; when the hydrogen cylinder tube 11 is locally convex, the mounting base 83 moves synchronously by overcoming the elastic force of the upper spring 931, and the abutment part 84 always abuts against the convex part of the hydrogen cylinder tube 11, so that the bottom of the abutment part 84 always abuts against the hydrogen cylinder tube 11, and the distance between the cutting head 82 and the hydrogen cylinder tube 11 is constant, forming an adaptive height adjustment structure. The mounting base 83 adaptively displaces in the vertical direction to ensure that the outer edge of the abutment part 84 continues to abut against the surface of the hydrogen cylinder tube 11, thereby dynamically maintaining a constant distance between the cutting head 82 and the hydrogen cylinder tube 11, thus facilitating the cutting head 82 to cut the hydrogen cylinder tube 11.

[0059] The hydrogen cylinder tube 11 on the clamping device is moved along the axial direction of the processing table 1 by the detection device 3. The calculated movement amount is then used to cut the hydrogen cylinder tube 11 to a fixed length, thus reserving a radially outward convex section at the end of the hydrogen cylinder tube 11. This prevents the thickness of the hydrogen cylinder tube 11 from falling below the set value due to subsequent spinning, ensuring that the actual stress on the tube wall does not exceed the material yield strength. Consequently, the hydrogen cylinder tube 11 is less prone to deformation or breakage, thereby improving its service life and safety. Furthermore, during subsequent carbon fiber winding, gaps are less likely to exist between the carbon fiber and the hydrogen cylinder tube 11, improving the peel strength of the carbon fiber layer.

[0060] Example 2

[0061] Please see Figure 1-7 This invention provides a technical solution: a cutting method for a hydrogen cylinder tube 11 fixed-length cutting device, the method comprising the following steps:

[0062] S1. After raising or lowering the hydrogen cylinder tube 11 to the set height, clamp the hydrogen cylinder tube 11 using the clamping device.

[0063] S11. After the hydrogen cylinder tube 11 is transferred to the top of the support block 61, the hydrogen cylinder tube 11 moves with the support block 61 and the lifting plate 62 through the lifting mechanism 6. Through the guide mechanism 64, the hydrogen cylinder tube 11 is lifted in the vertical direction until the hydrogen cylinder tube 11 moves to the set height.

[0064] S12. After the hydrogen cylinder tube 11 moves to the set height, the clamping arms 43 located on both sides of the hydrogen cylinder tube 11 move in a direction that approaches each other through the first drive mechanism 5 until the rollers 41 on the clamping arms 43 abut against the side wall of the hydrogen cylinder tube 11, thereby clamping the hydrogen cylinder tube 11.

[0065] S2. Use detection device 3 to detect the position of the highest critical point of radial outward bulge at the end of hydrogen cylinder tube 11.

[0066] S21, the end of the abutment rod 31 abuts against the side wall of the hydrogen cylinder tube 11;

[0067] S22. Move the optical communication probe 32 along the axial direction of the processing table 1 so that the abutment rod 31 moves synchronously. When the end of the abutment rod 31 moves to the position of the highest critical point of radial outward protrusion at the end of the hydrogen cylinder tube 11, the optical communication probe 32 records the position.

[0068] S3. Calculate the amount of movement of the clamping device toward the laser cutting head 82: The axial distance from the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube 11 to the cutting point of the laser cutting head 82 minus the allowance of the radial outward convex section at the end of the hydrogen cylinder tube 11 is used as the amount of movement of the clamping device toward the laser cutting head 82.

[0069] S31, the mobile optical communication probe 32 records the axial distance from the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube 11 to the cutting point of the laser cutting head 82 and the reserved amount of the radial outward convex section at the end of the hydrogen cylinder tube 11.

[0070] S32. Subtracting the two gives the amount of movement of the clamping device toward the laser cutting head 82.

[0071] S4, axial sliding clamping device, which moves the clamping device toward the laser cutting head 82 by the specified amount;

[0072] S41. Through the third drive mechanism 7, the third motor 73 starts and drives the gear 72 to rotate synchronously, thereby driving the rack 71 to move synchronously. The movement of the rack 71 drives the base 13 to move synchronously, and then drives the clamping arm 43 and the hydrogen cylinder tube 11 to move synchronously until the clamping arm 43 and the hydrogen cylinder tube 11 are moved towards the laser cutting head 82 by the amount of movement.

[0073] S5. The hydrogen cylinder tube 11 is cut using the laser cutting head 82. During the cutting process, the rotating mechanism 2 of the clamping device drives the hydrogen cylinder tube 11 to rotate, thus completing the fixed-length cutting of the hydrogen cylinder tube 11.

[0074] S51. Adjust the lifting component 86 to raise and lower the bracket 81, mounting base 83 and cutting head 82 in the vertical direction until the abutting part 84 on the mounting base 83 abuts against the hydrogen cylinder tube 11.

[0075] S52. When the roundness of the surface of the hydrogen cylinder tube 11 is not uniform, the abutment part 84 at the bottom of the mounting base 83 always abuts against the hydrogen cylinder tube 11 through the elastic support component, so that the distance between the cutting head 82 on the mounting base 83 and the hydrogen cylinder tube 11 is constant.

[0076] When the cutting head 82 cuts the hydrogen cylinder tube 11, the roller 41 rotates through the rotating mechanism 2 on the clamping arm 43, thereby driving the hydrogen cylinder tube 11 to rotate synchronously, thus completing the cutting of the hydrogen cylinder tube 11.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen cylinder tube length-cutting device, comprising a processing table (1), a clamping device axially slidably disposed on the processing table (1) for clamping a hydrogen cylinder tube (11), and a laser cutting head (82) disposed on the processing table (1) for cutting the hydrogen cylinder tube (11), wherein the clamping device is provided with a rotating mechanism (2) for driving the hydrogen cylinder tube (11) to rotate, characterized in that: It also has a detection device (3) for detecting the highest critical point of radial outward convexity at the end of the hydrogen cylinder tube (11). The axial distance from the highest critical point of radial outward convexity at the end of the hydrogen cylinder tube (11) to the cutting point of the laser cutting head (82) minus the allowance of the radial outward convex section at the end of the hydrogen cylinder tube (11) is used as the amount of movement of the clamping device toward the laser cutting head (82) so that the outward convex length at the end of the cut hydrogen cylinder tube (11) remains fixed. The detection device (3) includes an abutment rod (31) for abutting against the side wall of the hydrogen cylinder tube (11) and an optical communication probe (32) connected to the abutment rod (31). The optical communication probe (32) is axially slidably disposed on the processing table (1). The hydrogen cylinder tube (11) fixed-length cutting equipment also has a controller (12). The controller (12) receives information sent by the optical communication probe (32) about the position of the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube (11), calculates the movement of the clamping device accordingly, and controls the clamping device to move accordingly. The clamping device includes a base (13) slidably disposed on the processing table (1), two clamping units (4) slidably disposed on the base (13), and a first driving mechanism (5) for driving the clamping units (4) to move towards each other to clamp the hydrogen cylinder tube (11). The clamping unit (4) is provided with a plurality of rollers (41) for abutting against the hydrogen cylinder tube (11). The rotating mechanism (2) is located on the clamping unit and is used to drive one of the rollers (41) to rotate. The base (13) is equipped with lifting mechanisms (6) for lifting hydrogen cylinder tube (11) on both sides. The lifting mechanism (6) includes a second drive mechanism (63), a lifting plate (62) and a support block (61). The second drive mechanism (63) is fixedly connected to the base (13). The output end of the second drive mechanism (63) is fixedly connected to the bottom of the lifting plate (62). The top of the lifting plate (62) is fixedly connected to the bottom of the support block (61). The lifting mechanism (6) also includes a guide mechanism (64) for guiding the support block (61) to move up and down. The guide mechanism (64) is located on both sides of the second drive mechanism (63).

2. The hydrogen cylinder tube length cutting device according to claim 1, characterized in that: Each of the clamping units (4) includes a vertical plate (42) slidably connected to the base (13) and two clamping arms (43) fixed to the vertical plate (42), and each clamping arm (43) has two rollers (41).

3. The hydrogen cylinder tube length cutting device according to claim 1, characterized in that: The processing table (1) is provided with a third driving mechanism (7) for driving the hydrogen cylinder tube (11) to move. The third driving mechanism (7) includes a rack (71) connected to the bottom of the base (13), a gear (72) meshing with the rack (71), and a third motor (73). The driving end of the third motor (73) is fixed coaxially with the gear (72), and the third motor (73) is electrically connected to the controller (12).

4. The hydrogen cylinder tube length cutting device according to claim 1, characterized in that: The laser cutting head (82) includes a bracket (81) slidably disposed on the processing table (1) in the vertical direction, a cutting head (82) and a mounting base (83). The cutting head (82) is fixed to the mounting base (83), and the mounting base (83) is elastically connected to the bracket (81) through an elastic support member. The mounting base (83) is provided with at least one abutment part (84), the bottom end of which is lower than the bottom end of the cutting head (82), and is used to abut against the surface of the hydrogen cylinder tube (11) to be cut during the cutting process to maintain a constant distance between the cutting head (82) and the surface of the hydrogen cylinder tube (11) to be cut.

5. The hydrogen cylinder tube length cutting device according to claim 4, characterized in that: The elastic support component includes a slider (91) slidably disposed on the bracket (81), a guide rod (92), and an elastic element (93) that elastically supports the slider (91) in its sliding direction. The mounting base (83) is fixed to the slider (91), and the slider (91) is slidably disposed on the guide rod (92). The end of the guide rod (92) is connected to the bracket (81). The elastic element (93) includes an upper spring (931) and a lower spring (932). The bracket (81) is fixed with an upper spring seat (94) and a lower spring (932). The top of the upper spring (931) is supported on the upper spring seat (94), and the bottom of the upper spring (931) abuts against the slider (91). The bottom of the lower spring (932) is supported on the lower spring seat (95), and the top of the lower spring (932) abuts against the slider (91).

6. The hydrogen cylinder tube length cutting device according to claim 4, characterized in that: The processing table (1) is provided with a hanging arm (14) and a lifting component (86) for driving the support (81) to slide. The lifting component (86) is fixed to the hanging arm (14), and the support (81) slides relative to the hanging arm (14).

7. A method for cutting hydrogen cylinder tubing, characterized in that: The method of using a hydrogen cylinder tube length-cutting device according to any one of claims 1-6 includes the following steps: S1. After raising and lowering the hydrogen cylinder tube (11) to the set height, clamp the hydrogen cylinder tube (11) using the clamping device. S2. Use the detection device (3) to detect the position of the highest critical point of the radial outward bulge at the end of the hydrogen cylinder tube (11); S3. Calculate the amount of movement of the clamping device toward the laser cutting head (82): The axial distance from the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube (11) to the cutting point of the laser cutting head (82) minus the allowance of the radial outward convex section at the end of the hydrogen cylinder tube (11) is used as the amount of movement of the clamping device toward the laser cutting head (82). S4, axial sliding clamping device, which moves the clamping device toward the laser cutting head (82) by the amount of movement; S5. Use the laser cutting head (82) to cut the hydrogen cylinder tube (11). During the cutting process, the rotating mechanism (2) of the clamping device drives the hydrogen cylinder tube (11) to rotate, and completes the fixed-length cutting of the hydrogen cylinder tube (11).

8. The method for cutting hydrogen cylinder tubing according to claim 7, characterized in that: S1 specifically includes: S11. After the hydrogen cylinder tube (11) is transferred to the top of the support block (61), the hydrogen cylinder tube (11) moves with the support block (61) and the lifting plate (62) through the lifting mechanism (6). Through the guide mechanism (64), the hydrogen cylinder tube (11) is lifted in the vertical direction until the hydrogen cylinder tube (11) moves to the set height. S12. After the hydrogen cylinder tube (11) moves to the set height, the clamping arms (43) located on both sides of the hydrogen cylinder tube (11) move in a direction that approaches each other through the first drive mechanism (5) until the roller (41) on the clamping arm (43) abuts against the side wall of the hydrogen cylinder tube (11), thereby clamping the hydrogen cylinder tube (11). S2 specifically includes: S21, the end of the abutment rod (31) abuts against the side wall of the hydrogen cylinder tube (11); S22. Move the optical communication probe (32) along the axial direction of the processing table (1) so that the contact rod (31) moves synchronously. When the end of the contact rod (31) moves to the position of the highest critical point of the radial outward protrusion of the end of the hydrogen cylinder tube (11), the optical communication probe (32) records the position. S3 specifically includes: S31, Move the optical communication probe (32) to record the axial distance from the highest critical point of the radial outward convexity at the end of the hydrogen cylinder tube (11) to the cutting point of the laser cutting head (82) and the reserved amount of the radial outward convex section at the end of the hydrogen cylinder tube (11). S32. Subtracting the two gives the amount of movement of the clamping device toward the laser cutting head (82); S4 specifically includes: S41. Through the third drive mechanism (7), the third motor (73) starts and drives the gear (72) to rotate synchronously, thereby driving the rack (71) to move synchronously. The rack (71) moves and drives the base (13) to move synchronously, thereby driving the clamping arm (43) and the hydrogen cylinder tube (11) to move synchronously until the clamping arm (43) and the hydrogen cylinder tube (11) move toward the laser cutting head (82) by the amount of movement. S5 specifically includes: S51. Adjust the lifting component (86) to raise and lower the bracket (81), mounting base (83) and cutting head (82) in the vertical direction until the contact part (84) on the mounting base (83) contacts the hydrogen cylinder tube (11); S52. When the roundness of the surface of the hydrogen cylinder tube (11) is not uniform, the abutment part (84) at the bottom of the mounting base (83) is always in contact with the hydrogen cylinder tube (11) through the elastic support component, so that the distance between the cutting head (82) on the mounting base (83) and the hydrogen cylinder tube (11) is constant. S53. When the cutting head (82) cuts the hydrogen cylinder tube (11), the roller (41) rotates through the rotating mechanism (2) on the clamping arm (43) to drive the hydrogen cylinder tube (11) to rotate synchronously, thereby completing the cutting of the hydrogen cylinder tube (11).

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