A hydroforming machine for the production of stainless steel pipes

Abstract

The present invention discloses a hydroforming machine for the production of stainless steel pipes, belonging to the technical field of stainless steel pipe processing equipment, including a frame assembly. The frame assembly includes a processing platform, on the upper side wall of which a pair of hydroforming dies are slidably connected. A collection groove is drilled on the processing platform, and a pipe storage frame is arranged above the processing platform. A fixing frame is fixedly connected between the pipe storage frame and the processing platform, and a cylinder is fixedly connected between the fixing frame and the hydroforming die. Dynamic valve housings are arranged on both the left and right sides of the processing platform, and two telescopic clamping components are fixedly connected to the opposite side walls of the two dynamic valve housings; this solution can continuously switch the two telescopic clamping components through the driving component, enabling the two telescopic clamping components to alternately process the stainless steel pipes, achieving multiple functions such as automatic feeding, processing, and discharging, without manual operation, reducing potential safety hazards while also improving the processing efficiency of the existing device for stainless steel pipes.

Description

Technical Field

[0001] The present invention relates to the technical field of stainless steel pipe processing equipment, and specifically, it is a hydroforming machine for stainless steel pipe production. Background Art

[0002] A hydroforming machine is a device used for plastic forming processing, mainly achieving the forming of plastic materials through the action of water. Its working principle is to heat plastic particles to a molten state, and then use the pressure of water to inject the molten plastic into a mold. After cooling and solidification, the required product is formed. The hydroforming machine has the advantages of fast forming speed, low energy consumption, high forming accuracy, etc., and is widely used in the production of various plastic products, such as daily products, automotive parts, and electronic product casings. By flexibly adjusting the water pressure and temperature parameters, operators can effectively control the forming quality to meet the requirements of different products. Generally speaking, with its high efficiency and environmental protection characteristics, the hydroforming machine is becoming an important trend in the plastic processing industry.

[0003] The Chinese patent discloses a clamping device for a hydroforming machine for simultaneous production of multiple pipes (authorization publication number CN217223142U). This patent includes a hydroforming machine body. A fixed plate is fixedly connected to the front end of the hydroforming machine body. A moving plate is slidably connected to the top of the fixed plate, and a driving mechanism for driving the moving plate to move is connected to the fixed plate. An electric cylinder is installed on the top of the moving plate through a mounting frame. The output end of the electric cylinder is fixedly connected to a feeding plate. Two annular mounting frames are slidably connected to the top of the feeding plate. Three cylinders are installed on the annular mounting frame. The three cylinders are circumferentially distributed at equal intervals on the periphery of the annular mounting frame. The output end of the cylinder passes through the annular mounting frame and is fixedly connected to a clamping ring. An adjusting component for adjusting the distance between the two annular mounting frames is connected to the feeding plate.

[0004] However, in the above patent, it is necessary to manually feed the pipe fittings into the clamping device. For existing hydroforming machines, it is also necessary to manually feed the pipe fittings into the corresponding molds, use the clamping device to clamp the water pipes, and manually take them away after the pipe fittings are processed. The manual taking method not only has certain safety hazards, but also increases the processing cost of stainless steel pipes and reduces the processing efficiency of stainless steel pipes. Therefore, the applicant proposes a hydroforming machine for stainless steel pipe production. Summary of the Invention

[0005] The purpose of the present invention is to provide a hydroforming machine for stainless steel pipe production to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A hydroforming machine for the production of stainless steel pipes, comprising a frame assembly. The frame assembly includes a processing platform. A pair of hydroforming dies are slidably connected to the upper sidewall of the processing platform. A collection groove is dug on the processing platform. A pipe storage frame is arranged above the processing platform. A fixing frame is fixedly connected between the pipe storage frame and the processing platform. A cylinder is fixedly connected between the fixing frame and the hydroforming die. Moving valve shells are arranged on both the left and right sides of the processing platform. Two telescopic clamping components are fixedly connected to the opposite sidewalls of the two moving valve shells;

[0008] The telescopic clamping component includes a fixed ring block. Two connecting plates are fixedly connected between the fixed ring block and the moving valve shell. A toothed belt ring is rotatably connected inside the fixed ring block. A clamping cylinder is threadedly connected inside the toothed belt ring. A limiting ring block is fixedly connected to one end of the clamping cylinder close to the moving valve shell. A square pipe communicating with the inside of the moving valve shell is inserted into the clamping cylinder. A sealing plug is slidably connected inside the clamping cylinder, and the square pipe is inserted into the sealing plug. A driving pipe is arranged between the two fixed ring blocks. The same toothed belt is sleeved between the two toothed belt rings. A toothed belt wheel meshing with the toothed belt is fixedly connected to the driving pipe. A resistance increasing component is rotatably connected to the driving pipe.

[0009] As a further scheme of the present invention, the frame assembly further includes a fixed valve core rotatably connected inside the moving valve shell. A valve hole is dug inside the fixed valve core. Liquid injection pipes rotatably connected to the moving valve shell are fixedly connected to the opposite sidewalls of the two fixed valve cores, and the liquid injection pipes are communicated with the valve hole.

[0010] As a further scheme of the present invention, the resistance increasing component includes a limiting square rod inserted on the fixed valve core. A conical block is fixedly connected to one end of the limiting square rod away from the fixed valve core. A thrust spring is fixedly connected between the conical block and the fixed valve core.

[0011] As a further scheme of the present invention, an annular block is slidably connected inside the sidewall of the moving valve shell. Moving blocks are fixedly connected to both the upper and lower sidewalls of the annular block. A return spring is fixedly connected between the moving block and the moving valve shell.

[0012] As a further scheme of the present invention, a square box is fixedly connected to the sidewall of the moving valve shell. A moving block is slidably connected inside the square box, and the driving pipe is threadedly connected to the moving block. A fixed square rod is rotatably connected inside the driving pipe.

[0013] As a further scheme of the present invention, the limiting square rod is inserted inside the fixed square rod and penetrates through the annular block. A square top plate located on one side of the conical block is fixedly connected to the limiting square rod. Two pull rods fixedly connected to the moving block are inserted into the annular block. A driving component is fixedly connected between the two fixed square rods.

[0014] As a further scheme of the present invention, the driving component includes a motor box fixedly connected between the two fixed square rods. A dual-axis motor is fixedly connected inside the motor box.

[0015] As a further solution of the present invention, magnetic couplings are fixedly connected between the two output ends of the biaxial motor and the two drive tubes respectively, and a two-way tube taking assembly is fixedly connected to the upper side wall of the motor box.

[0016] As a further solution of the present invention, the two-way tube taking assembly includes two support rods fixedly connected to the upper side wall of the motor box, and the upper ends of the two support rods are fixedly connected to the same connection base.

[0017] As a further solution of the present invention, two arc-shaped push doors are hinged to the inner side wall of the connection base, and torsion springs are fixedly connected between the two arc-shaped push doors and the connection base.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. When the present invention is used, the two telescopic clamping components can be continuously switched by the driving component, so that the two telescopic clamping components alternately process the stainless steel pipes, achieving multiple functions such as automatic feeding, processing, and discharging, without manual operation, reducing potential safety hazards, and improving the processing efficiency of the existing device for stainless steel pipes.

[0020] 2. When the present invention is used, the stability of the alternating movement of the two telescopic clamping components and the clamping action of the two telescopic clamping components on the stainless steel pipes can be improved through the resistance increasing component, and at the same time, in cooperation with the two-way tube taking assembly, the two-way tube taking action on the stainless steel pipes can be realized to conform to the running action of the telescopic clamping components.

[0021] 3. When the present invention is used, the two hydroforming molds can be automatically clamped on the stainless steel pipes through the frame component, and at the same time, when the two hydroforming molds are separated, the shaped stainless steel pipes can fall off automatically. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three-dimensional perspective view of a hydroforming machine for stainless steel pipe production;

[0023] Figure 2 is a structural schematic diagram of the frame component in a hydroforming machine for stainless steel pipe production;

[0024] Figure 3 is a structural schematic diagram of the fixed valve core part in a hydroforming machine for stainless steel pipe production;

[0025] Figure 4 is a structural schematic diagram of the toothed belt pulley part in a hydroforming machine for stainless steel pipe production;

[0026] Figure 5 is a structural schematic diagram of the telescopic clamping component in a hydroforming machine for stainless steel pipe production;

[0027] Figure 6 It is a schematic structural diagram of a resistance - increasing component in a hydro - bulging forming machine for stainless steel pipe production;

[0028] Figure 7 It is a schematic structural diagram of a driving component in a hydro - bulging forming machine for stainless steel pipe production;

[0029] Figure 8 It is a schematic structural diagram of the motor box part in a hydro - bulging forming machine for stainless steel pipe production;

[0030] Figure 9 It is a schematic structural diagram of the arc - shaped push door part in a hydro - bulging forming machine for stainless steel pipe production.

[0031] In the figure:

[0032] 1. Frame assembly; 101. Processing platform; 102. Hydro - bulging die; 103. Collection tank; 104. Fixed frame; 105. Cylinder; 106. Fixed valve core; 107. Valve hole; 108. Moving valve shell; 109. Liquid injection pipe;

[0033] 2. Pipe storage frame;

[0034] 3. Telescopic clamping component; 301. Fixed ring block; 302. Connecting plate; 303. Tooth belt ring; 304. Clamping cylinder; 305. Limiting ring block; 306. Square pipe; 307. Sealing plug; 308. Driving pipe; 309. Tooth belt pulley; 310. Tooth belt;

[0035] 4. Resistance - increasing component; 401. Limiting square rod; 402. Conical block; 403. Thrust spring; 404. Ring - shaped block; 405. Moving block; 406. Return spring; 407. Square box; 408. Moving block; 409. Fixed square rod; 410. Square top plate; 411. Pull rod;

[0036] 5. Driving component; 501. Motor box; 502. Biaxial motor; 503. Magnetic coupling;

[0037] 6. Two - way pipe - taking component; 601. Support rod; 602. Connecting base; 603. Arc - shaped push door; 604. Torsion spring. Detailed implementation mode

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0039] Embodiment 1: Please refer to Figures 1 to 4 In the embodiment of the present invention, a hydroforming machine for the production of stainless steel pipes includes a frame assembly 1. The frame assembly 1 includes a processing platform 101. A pair of hydroforming dies 102 are slidably connected to the upper side wall of the processing platform 101 by means of a chute clamping. During use, the two hydroforming dies 102 are pushed by two cylinders 105 to move the two hydroforming dies 102 closer to each other and extrude the stainless steel pipe, so that the stainless steel pipe is hydroformed into a shape conforming to the inner wall of the hydroforming die 102. A collection groove 103 is formed on the processing platform 101. After the stainless steel pipe is shaped, the stainless steel pipe will fall through the collection groove 103. A pipe storage frame 2 for storing multiple stainless steel pipes to be processed is arranged above the processing platform 101. A fixing frame 104 is fixedly connected between the pipe storage frame 2 and the processing platform 101. A cylinder 105 is fixedly connected between the fixing frame 104 and the hydroforming die 102. Dynamic valve housings 108 are arranged on both the left and right sides of the processing platform 101. Two telescopic clamping components 3 are fixedly connected to the opposite side walls of the two dynamic valve housings 108;

[0040] The telescopic clamping assembly 3 includes a fixed ring block 301. There are two connecting plates 302 fixedly connected between the fixed ring block 301 and the moving valve housing 108. The fixed ring block 301 is fixedly connected to the side wall of the moving valve housing 108 through the two connecting plates 302. The connecting plates 302 are fixedly connected to the upper and lower ends of the fixed ring block 301. Inside the fixed ring block 301, a toothed belt ring 303 is rotatably connected through a bearing. Inside the toothed belt ring 303, a clamping cylinder 304 is threadedly connected. One end of the clamping cylinder 304 away from the moving valve housing 108 is semi-circular, which is convenient for the clamping cylinder 304 to push and seal the two ends of the stainless steel pipe, playing a role in clamping and fixing the stainless steel pipe and water swelling and sealing. One end of the clamping cylinder 304 close to the moving valve housing 108 is fixedly connected with a limiting ring block 305, and the limiting ring block 305 can play a limiting role for the clamping cylinder 304. A square pipe 306 communicating with the inside of the moving valve housing 108 is inserted into the clamping cylinder 304. Whenever the moving valve housing 108 rotates 180 degrees, the two square pipes 306 will be switched to communicate with the valve hole 107 in turn. A sealing plug 307 is slidably connected inside the clamping cylinder 304, and the square pipe 306 is inserted into the sealing plug 307. A driving pipe 308 is arranged between the two fixed ring blocks 301. The same toothed belt 310 is sleeved between the two toothed belt rings 303. A toothed belt pulley 309 meshing with the toothed belt 310 is fixedly connected to the driving pipe 308. A resistance increasing assembly 4 is rotatably connected to the driving pipe 308. When the toothed belt pulley 309 rotates, it can drive the two toothed belt rings 303 to rotate through the toothed belt 310. Then, through the two toothed belt rings 303, one of the clamping cylinders 304 is driven to extend outwards respectively, and the other clamping cylinder 304 is driven to contract inwards. When the clamping cylinder 304 extends to the maximum range, the limiting ring block 305 will abut against the toothed belt ring 303. When the clamping cylinder 304 contracts to the maximum range, the limiting ring block 305 will abut against the moving valve housing 108. Therefore, when the limiting ring block 305 extends or contracts to the maximum range, when the toothed belt pulley 309 continues to rotate in the same direction, it can no longer drive the toothed belt ring 303 to rotate through the toothed belt 310, but will drive the entire moving valve housing 108 to rotate through the toothed belt 310. The function of the resistance increasing assembly 4 is to prevent the moving valve housing 108 from rotating when the clamping cylinder 304 pushes the stainless steel pipe, because when the resistance of the clamping cylinder 304 pushing is too large, the toothed belt pulley 309 will also drive the moving valve housing 108 to rotate through the toothed belt 310. The resistance increasing assembly 4 can ensure that the moving valve housing 108 can rotate only when the limiting ring block 305 extends or contracts to the maximum range, improving the stability of the device operation.

[0041] It should be noted that the thread directions of the two clamping cylinders 304 on the same side of the moving valve housing 108 are opposite. When the two toothed belt rings 303 rotate in the same direction, the movements of the two clamping cylinders 304 are opposite. So that one of the clamping cylinders 304 can clamp the stainless steel pipe while the other clamping cylinder 304 can loosen the processed stainless steel pipe, causing the stainless steel pipe to fall off.

[0042] The frame component 1 further includes a fixed valve core 106 rotatably connected inside the moving valve housing 108. A sealing ring is fixedly connected to the inner side wall of the moving valve housing 108. The sealing ring is not shown in the figure. The sealing ring can effectively prevent liquid from leaking from the gap between the moving valve housing 108 and the fixed valve core 106. A valve hole 107 is drilled inside the fixed valve core 106. Liquid injection pipes 109 rotatably connected to the moving valve housing 108 are fixedly connected to the opposite side walls of the two fixed valve cores 106, and the liquid injection pipes 109 are communicated with the valve hole 107. The ends of the two liquid injection pipes 109 away from the moving valve housing 108 are communicated with a liquid supply device. The liquid supply device can generate a hydrostatic pressure to deform the stainless steel pipe. The structure and principle of the liquid supply device are prior arts and will not be elaborated here.

[0043] The resistance increasing component 4 includes a limiting square rod 401 inserted on the fixed valve core 106. One end of the limiting square rod 401 far from the fixed valve core 106 is fixedly connected with a conical block 402. A plurality of uniformly distributed rubber tooth surfaces are fixedly connected to the side wall of the conical block 402. An increasing resistance groove matching the side wall of the conical block 402 is drilled on the inner side wall of the annular block 404. When the conical block 402 contacts the annular block 404, the friction force can be increased through the rubber tooth surfaces, making the moving valve housing 108 not easy to rotate. A thrust spring 403 is fixedly connected between the conical block 402 and the fixed valve core 106. An annular block 404 is slidably connected inside the side wall of the moving valve housing 108. Moving blocks 405 are fixedly connected to both the upper and lower side walls of the annular block 404. A return spring 406 is fixedly connected between the moving block 405 and the moving valve housing 108. A square box 407 is fixedly connected to the side wall of the moving valve housing 108. A moving block 408 is slidably connected inside the square box 407. The end of the driving pipe 308 is threadedly connected to the moving block 408. A fixed square rod 409 is rotatably connected inside the driving pipe 308. The limiting square rod 401 is inserted inside the fixed square rod 409 and the limiting square rod 401 is arranged through the annular block 404. A square top plate 410 located on one side of the conical block 402 is fixedly connected to the limiting square rod 401. Two pull rods 411 inserted on the annular block 404 and fixedly connected to the moving block 408. One end of the pull rod 411 far from the moving block 408 is fixedly connected with a top block. The annular block 404 can be pulled to move through the two top blocks. A driving component 5 is fixedly connected between the two fixed square rods 409. When the driving pipe 308 drives the toothed belt pulley 309 to rotate, the toothed belt pulley 309 drives the toothed belt ring 303 to rotate through the toothed belt 310. At the same time, the driving pipe 308 also drives the moving block 408 to move. When the limiting ring block 305 is not at the maximum range of extension or contraction, the conical block 402 is attached to the annular block 404 under the thrust of the thrust spring 403, and the annular block 404 is also attached to the conical block 402 under the thrust of the moving block 405, making the moving valve housing 108 unable to rotate. When the limiting ring block 305 is close to the maximum range of contraction, the moving block 408 drives the square top plate 410 to contact the conical block 402 through the limiting square rod 401. If the driving pipe 308 continues to rotate in the same direction at this time, it will drive the square top plate 410 to push the conical block 402, separating the conical block 402 and the annular block 404. At this time, the moving valve housing 108 is no longer locked and rotates. When the limiting ring block 305 is close to the maximum range of extension, the end of the pull rod 411 driven by the moving block 408 contacts the side wall of the annular block 404. If the driving pipe 308 continues to rotate in the same direction at this time, it will drive the pull rod 411 to pull the annular block 404 to move, separating the conical block 402 and the annular block 404. At this time, the moving valve housing 108 is also unlocked and rotates normally.

[0044] Embodiment 2: Please refer to Figures 8 to 9, on the basis of Embodiment 1, the driving assembly 5 includes a motor box 501 fixedly connected between two fixed square rods 409. Inside the motor box 501, a dual-axis motor 502 is fixedly connected. The dual-axis motor 502 has two output shafts. The structure and principle of the dual-axis motor 502 are both prior arts and will not be elaborated here. Magnetic coupling devices 503 are fixedly connected between the two output ends of the dual-axis motor 502 and the two driving tubes 308 respectively. A two-way tube taking assembly 6 is fixedly connected to the upper side wall of the motor box 501. When the dual-axis motor 502 is started, it will drive the two driving tubes 308 to rotate through the magnetic coupling devices 503, and the motor box 501 is supported and fixed by the fixed square rods 409. To prevent the motor box 501 from rotating, the driving tubes 308 can support the fixed square rods 409, and the square top plate 410 inside the fixed square rod 409 is inserted into the fixed valve core 106. The fixed valve core 106 is connected to the liquid supply device through the liquid injection tube 109. Therefore, the fixed valve core 106 is a fixed part. Thus, the fixed square rod 409 can support the motor box 501, and the motor box 501 can support the two-way tube taking assembly 6.

[0045] The two-way tube taking assembly 6 includes two support rods 601 fixedly connected to the upper side wall of the motor box 501. The upper ends of the two support rods 601 are fixedly connected to the same connection base 602. Two arc-shaped push doors 603 are hinged to the inner side wall of the connection base 602. The arc-shaped push doors 603 do not directly contact the lower end of the tube storage frame 2. Torsion springs 604 are fixedly connected between the two arc-shaped push doors 603 and the connection base 602. After the moving valve housing 108 rotates when the two clamping cylinders 304 clamp and insert the stainless steel tube, the stainless steel tube slides out directly from one side of the two-way tube taking assembly 6. The stainless steel tube will directly push the arc-shaped push door 603, causing the arc-shaped push door 603 to open. Subsequently, the arc-shaped push door 603 will automatically reset under the action of the torsion spring 604, and at the same time, the previous stainless steel tube will also fall off.

[0046] The working principle of the present invention is:

[0047] When the present invention is in use, first, the staff puts the stainless steel pipe to be processed into the inside of the pipe storage frame 2, and then starts the double-shaft motor 502. The double-shaft motor 502 drives the two drive pipes 308 on both sides thereof to rotate through the magnetic coupling 503. The magnetic coupling 503 can achieve contactless driving rotation. The structure and principle of the magnetic coupling 503 are prior arts and will not be elaborated herein. The drive pipe 308 drives the toothed belt pulley 309 to rotate. The toothed belt pulley 309 drives the two toothed belt rings 303 to rotate through the toothed belt 310. Further, one of the clamping cylinders 304 is driven to extend outwards through the two toothed belt rings 303 respectively, and the other clamping cylinder 304 is driven to contract inwards. The clamping cylinder 304 extending outwards will be inserted into both ends of the stainless steel pipe to be processed, and the clamping cylinder 304 contracting inwards will retract from both ends of the processed stainless steel pipe, so that the processed stainless steel pipe will fall from the collection groove 103.

[0048] The toothed belt 310 is provided as a toothed belt.

[0049] When the limit ring block 305 extends or contracts to the maximum range and then the toothed belt pulley 309 continues to rotate in the previous direction, it can no longer drive the toothed belt ring 303 to rotate through the toothed belt 310. Instead, it will drive the entire moving valve housing 108 to rotate through the toothed belt 310. The staff can set the program of the double-shaft motor 502 so that after the limit ring block 305 extends or contracts to the maximum range, it will continue to rotate 180 degrees in the original direction, that is, drive the moving valve housing 108 to rotate 180 degrees through the drive pipe 308, so that the stainless steel pipe to be processed can rotate to the processing area below;

[0050] During the rotation of the stainless steel pipe to be processed, the stainless steel pipe will directly push the arc-shaped push door 603 open, so that the stainless steel pipe slides out from one side of the double-directional pipe taking assembly 6. Then the arc-shaped push door 603 will automatically reset under the action of the torsion spring 604, and at the same time, the previous stainless steel pipe will also fall down;

[0051] After the stainless steel pipe to be processed can rotate to the processing area below, two cylinders 105 are used to push the hydroforming die 102, so that the two hydroforming dies 102 approach each other and cause extrusion on the stainless steel pipe. At the same time, the square pipe 306 below will be communicated with the liquid injection pipe 109 through the valve hole 107. Through the liquid supply equipment on the liquid injection pipe 109, liquid can be injected into the stainless steel pipe through the clamping cylinder 304, so that the stainless steel pipe is hydroformed into a shape conforming to the inner wall of the hydroforming die 102;

[0052] Subsequently, the cylinder 105 pulls the hydroforming die 102 back to its original position. At the same time, the dual-axis motor 502 drives the drive tube 308 to rotate in the opposite direction. Until the lower limit ring block 305 contracts to the maximum range, the limit ring block 305 is pulled out from both ends of the shaped stainless steel tube, causing the stainless steel tube to fall from the collection trough 103. After that, the dual-axis motor 502 continues to rotate 180 degrees in the original direction, and again drives the moving valve housing 108 to rotate through the drive tube 308, rotating the clamping cylinder 304 for clamping the stainless steel tube to be processed to the lower processing area, and repeating the above steps;

[0053] In addition, to prevent the clamping cylinder 304 from causing the moving valve housing 108 to rotate through the toothed belt 310 when the clamping cylinder 304 pushes against the stainless steel tube due to excessive resistance during the pushing process, the resistance increasing component 4 can be used to achieve the stability of the rotation of the moving valve housing 108. The working principle of the resistance increasing component 4 is as follows:

[0054] When the drive tube 308 drives the toothed belt pulley 309 to rotate, the toothed belt pulley 309 drives the toothed belt ring 303 to rotate through the toothed belt 310. At the same time, the drive tube 308 also drives the moving block 408 to move. When the limit ring block 305 is not at the maximum range of extension or contraction, the conical block 402 is in contact with the annular block 404 under the thrust of the thrust spring 403, and the annular block 404 is also in contact with the conical block 402 under the thrust of the moving block 405, making the moving valve housing 108 unable to rotate. When the limit ring block 305 is approaching the maximum range of contraction, the moving block 408 drives the square top plate 410 to contact the conical block 402 through the limit square rod 401. If the drive tube 308 continues to rotate in the same direction at this time, it will drive the square top plate 410 to push the conical block 402, separating the conical block 402 and the annular block 404. At this time, the moving valve housing 108 is no longer locked and rotates. When the limit ring block 305 is approaching the maximum range of extension, the moving block 408 drives the end of the pull rod 411 to contact the side wall of the annular block 404. If the drive tube 308 continues to rotate in the same direction at this time, it will drive the pull rod 411 to pull the annular block 404 to move, separating the conical block 402 and the annular block 404. At this time, the moving valve housing 108 is also unlocked and rotates normally.

[0055] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A water expansion forming machine for stainless steel pipe production, comprising a frame assembly (1), characterized in that: The frame assembly (1) comprises a processing platform (101), a pair of water swelling molds (102) are slidably connected to the upper side wall of the processing platform (101), a collecting groove (103) is excavated on the processing platform (101), a tube storage frame (2) is arranged on the upper side of the processing platform (101), a fixing frame (104) is fixedly connected between the tube storage frame (2) and the processing platform (101), a cylinder (105) is fixedly connected between the fixing frame (104) and the water swelling mold (102), and movable valve housings (108) are arranged on the left and right sides of the processing platform (101), and two telescopic clamping assemblies (3) are fixedly connected to the opposite side walls of the two movable valve housings (108); The telescopic clamping assembly (3) comprises a fixed ring block (301), two connecting plates (302) are fixedly connected between the fixed ring block (301) and the movable valve housing (108), a toothed belt ring (303) is rotatably connected inside the fixed ring block (301), a clamping sleeve (304) is threadedly connected inside the toothed belt ring (303), one end of the clamping sleeve (304) close to the movable valve housing (108) is fixedly connected to a limit ring block (305), and a plug is inserted on the clamping sleeve (304) which is connected to the inside of the movable valve housing (108). A square tube (306) is connected to the clamp (304), a sealing plug (307) is slidably connected inside the clamp (304), and the square tube (306) is plugged into the sealing plug (307), a driving tube (308) is arranged between the two fixed ring blocks (301), a same toothed belt (310) is sleeved between the two toothed belt rings (303), a toothed belt pulley (309) meshing with the toothed belt (310) is fixedly connected to the driving tube (308), and a resistance increasing component (4) is rotatably connected to the driving tube (308).

2. A water expansion forming machine for stainless steel pipe production according to claim 1, characterized in that: The frame assembly (1) further comprises a fixed valve core (106) rotatably connected to the interior of the movable valve housing (108), a valve hole (107) being bored inside the fixed valve core (106), two side walls of the fixed valve core (106) facing away from each other are fixedly connected to injection pipes (109) rotatably connected to the movable valve housing (108), and the injection pipes (109) are in communication with the valve hole (107).

3. A water expansion forming machine for stainless steel pipe production according to claim 2, characterized in that: The resistance increasing assembly (4) comprises a limiting square rod (401) plugged into the fixed valve core (106), one end of the limiting square rod (401) away from the fixed valve core (106) being fixedly connected to a conical block (402), and a thrust spring (403) being fixedly connected between the conical block (402) and the fixed valve core (106).

4. A water expansion forming machine for stainless steel pipe production according to claim 3, characterized in that: An annular block (404) is slidably connected to the inner side wall of the movable valve housing (108), a shifting block (405) is fixedly connected to both upper and lower side walls of the annular block (404), and a return spring (406) is fixedly connected between the shifting block (405) and the movable valve housing (108).

5. A water expansion forming machine for stainless steel pipe production according to claim 4, characterized in that: A square box (407) is fixedly connected to the side wall of the movable valve housing (108), a moving block (408) is slidably connected inside the square box (407), a driving tube (308) is threadedly connected to the moving block (408), and a fixed square rod (409) is rotatably connected inside the driving tube (308).

6. A water expansion forming machine for stainless steel pipe production according to claim 5, characterized in that: The limiting square rod (401) is inserted into the fixed square rod (409), and the limiting square rod (401) passes through the annular block (404); the limiting square rod (401) is fixedly connected to a square top plate (410) located on one side of the conical block (402); two pull rods (411) fixedly connected to the moving block (408) are inserted into the annular block (404); and a driving assembly (5) is fixedly connected between the two fixed square rods (409).

7. A water expansion forming machine for stainless steel pipe production according to claim 6, characterized in that: The driving assembly (5) comprises a motor box (501) fixedly connected between two fixed square rods (409), and a dual-axis motor (502) is fixedly connected inside the motor box (501).

8. A water expansion forming machine for stainless steel pipe production according to claim 7, characterized in that: A magnetic coupling (503) is fixedly connected between the two output ends of the dual-axis motor (502) and the two drive tubes (308), respectively, and a bidirectional tube removal assembly (6) is fixedly connected to the upper side wall of the motor box (501).

9. A water expansion forming machine for stainless steel pipe production according to claim 8, characterized in that: The bidirectional tube extraction assembly (6) comprises two support rods (601) fixedly connected to the upper side wall of the motor box (501), and the upper ends of the two support rods (601) are fixedly connected to the same connecting base (602).

10. A water expansion forming machine for stainless steel pipe production according to claim 9, characterized in that: Two arc-shaped push doors (603) are hingedly connected to the inner side wall of the connecting base (602), and a torsion spring (604) is fixedly connected between the two arc-shaped push doors (603) and the connecting base (602).

Images