Manufacturing system and method for variable-wall pipe

Abstract

The invention discloses a manufacturing system and method for a variable-wall pipe in the technical field of variable-wall pipe manufacturing, and the manufacturing system comprises a bottom plate, an upper mold and a lower mold are arranged at the upper middle position of the bottom plate, and the lower mold is fixedly connected with the bottom plate; liquid injection pipes are symmetrically arranged on the left side and the right side of the lower mold; a pipe blank is arranged between the upper die and the lower die; material returning mechanisms are symmetrically arranged on the left side and the right side of the bottom plate, and are used for automatically taking out a formed pipe blank in the lower mold from a mold cavity of the lower mold; a first driving mechanism is arranged on the bottom plate and used for sequentially driving the feeding mechanism and the material returning mechanism to operate. The device is easy to operate, convenient to use and capable of automatically placing a pipe blank into a die cavity of the lower die and automatically taking out the pipe blank after the pipe blank is machined, manpower can be effectively saved, meanwhile, feeding and discharging of pipe blank machining can be rapidly completed, and the pipe blank machining efficiency can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of variable wall tube manufacturing, and in particular to a variable wall tube manufacturing system and method. Background Art

[0002] Variable wall pipe refers to a pipe whose wall thickness or diameter changes along the length of the pipe. This type of pipe is designed to meet specific engineering requirements, such as withstanding different pressures, stresses or optimizing material usage.

[0003] When batch-producing large-sized pipe fittings, hydraulic forming is usually used. The metal tube to be processed is placed in the mold cavity of the mold, and the two ends of the tube are sealed by a tube plug. Then, liquid medium is introduced into the tube along the oil inlet, and axial thrust is applied to both ends of the tube to cause local expansion of the tube. Finally, the outer surface of the tube is fitted with the upper and lower mold cavities. However, the existing equipment requires manual operation to put the tube into the mold cavity and take it out of the mold cavity after the tube is formed. The operation is complicated, time-consuming and labor-intensive, which leads to low efficiency of tube processing. Summary of the invention

[0004] The object of the present invention is to provide a system and method for manufacturing a variable wall tube to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a system and method for manufacturing variable-wall tubes, comprising a base plate, an upper mold and a lower mold are provided in the middle position of the base plate, and the lower mold is fixedly connected to the base plate; injection tubes are symmetrically provided at the left and right sides of the lower mold; a tube blank is provided between the upper mold and the lower mold; a loading mechanism is provided at the rear of the upper mold and the lower mold, and the loading mechanism is used to automatically put the tube blank to be formed into the mold cavity on the lower mold; a material return mechanism is symmetrically provided at the left and right sides of the base plate, and the material return mechanism is used to automatically take out the tube blank formed in the lower mold from the mold cavity of the lower mold; a first driving mechanism is provided on the base plate, and the first driving mechanism is used to drive the loading mechanism and the material return mechanism to operate in sequence.

[0006] Preferably, the feeding mechanism includes a feeding rod, which is located at the rear side of the lower mold and is provided with a placing frame, in which a tube blank is arranged and both left and right ends of the placing frame are rotatably connected to the feeding rod; a dumping mechanism is provided on the feeding rod, and the dumping mechanism is used to drive the placing frame to rotate and place the tube blank into the mold cavity of the lower mold when the placing frame moves forward to the loading position.

[0007] Preferably, the dumping mechanism includes a first sliding frame, which is located at the bottom of the placement frame; first sliding grooves are symmetrically opened on the left and right sides of the loading rod, and the left and right ends of the first sliding frame are respectively slidingly connected to the first sliding grooves on the left and right sides and the first sliding frame is located at the frontmost position in the first sliding groove; the left and right ends of the first sliding frame are symmetrically rotationally connected to the first connecting rod, and the other end of the first connecting rod is rotationally connected to the placement frame.

[0008] Preferably, the material return mechanism includes two conveyor belts, which are symmetrically distributed on the left and right sides of the lower mold; a one-way bearing is fixedly connected to the rotating shaft in the conveyor belt, and the one-way bearing is rotatably connected to the base plate; four clamping mechanisms are evenly spaced on the conveyor belt, and the clamping mechanisms are used to clamp the formed tube blanks in the mold cavity of the lower mold; discharging mechanisms are symmetrically provided on the left and right sides of the lower mold, and the discharging mechanisms are used to drive the clamping mechanisms to release the tube blanks when the clamping mechanisms clamp the tube blanks and drive the tube blanks to move to the front position of the lower mold.

[0009] Preferably, the clamping mechanism includes a fixed frame, which is fixedly connected to the conveyor belt and is slidably connected to the fixed frame; a clamping rod is provided in the second sliding frame, and the clamping rod is slidably connected to the second sliding frame; a first spring is fixedly connected in the clamping rod, and the other end of the first spring is fixedly connected to the second sliding frame; a clamping block is slidably connected to the second sliding frame; a clamping slot is provided on the clamping rod, the clamping block is engaged with the clamping slot and the second spring is fixedly connected to the clamping block; a cross bar is slidably connected to the side position of the second sliding frame, and second connecting rods are symmetrically and rotationally connected to the two ends of the cross bar, and the other end of the second connecting rod is rotationally connected to the clamping block.

[0010] Preferably, the discharge mechanism includes two support rods, which are located on the left and right sides in front of the lower mold, and are fixedly connected to the bottom plate; extrusion frames are symmetrically provided on the left and right sides of the lower mold, and are fixedly connected to the bottom plate; the clamping rod is fixedly connected to two extrusion blocks at one end away from the lower mold, and the extrusion frame is located on the moving track of the two extrusion blocks.

[0011] Preferably, the first driving mechanism includes a cylinder, which is located behind the loading rod and is fixedly connected to the bottom plate; the telescopic end of the cylinder is fixedly connected to the loading rod; push rods are symmetrically rotatably connected to the left and right sides in front of the loading rod, and the push rods are inclined at forty-five degrees with the front lower and the back higher; the push rod is on the moving trajectory of the clamping rod above the conveyor belt; the front end of the loading rod is located at the oblique upper position of the push rod and is fixedly connected to a baffle rod, and the baffle rod is in contact with the oblique upper part of the push rod; trigger mechanisms are provided on the left and right sides of the lower mold, and the trigger mechanisms are used to drive the clamping block to disengage from the slot when the conveyor belt drives the clamping rod to move to the left and right ends of the formed tube blank in the mold cavity of the lower mold.

[0012] Preferably, the trigger mechanism comprises an L-shaped baffle rod, which is fixedly connected to the lower mold; the L-shaped baffle rod is located on the moving track of the second sliding frame on the upper part of the conveyor belt.

[0013] A method for manufacturing a variable wall tube, the specific steps of the method are as follows: Step 1: Start the first driving mechanism, which drives the feeding mechanism and the unloading mechanism to operate alternately; Step 2: When the feeding mechanism is running, it will automatically place the tube blank to be processed into the mold cavity on the lower mold; Step 3: After the tube is placed in the mold cavity on the lower mold, the upper mold is driven to fit with the lower mold, and then the injection pipes on the left and right sides are driven to seal the left and right ends of the tube and inject high-pressure liquid into the tube. The tube can be processed into the desired shape by the high-pressure liquid; Step 4: After the processing is completed, the upper mold is driven to separate from the lower mold, and the two injection tubes are driven to separate from the tube blank at the same time. The material removal mechanism will automatically take out the tube blank formed in the cavity of the lower mold.

[0014] Compared with the prior art, the present invention has the following beneficial effects: When the first driving mechanism is started, the first driving mechanism drives the feeding mechanism to operate, and the feeding mechanism automatically places the tube blank to be processed into the mold cavity on the lower mold, and then starts the upper mold to move downward to fit with the lower mold, and then drives the injection pipes on the left and right sides to seal the left and right ends of the tube blank and apply a certain pressure to the tube blank; at this time, the injection pipe is started to inject liquid into the tube blank, and under the action of the hydraulic pressure in the tube blank, the tube blank will fit the mold cavity of the upper mold and the lower mold and gradually take shape; when the tube blank is formed, the injection pipes on the left and right sides and the upper mold are driven to separate from the formed tube blank, and at this time, the first driving mechanism drives the material withdrawal mechanism to automatically take out the formed tube blank from the membrane cavity of the lower mold; the device is simple to operate and easy to use, can automatically place the tube blank into the membrane cavity of the lower mold, and after the tube blank is processed, automatically take out the tube blank, which can effectively save manpower, and can quickly complete the loading and unloading of the tube blank processing, and can effectively improve the efficiency of the tube blank processing.

[0015] The present invention drives a feeding rod to move back and forth through a cylinder. When the feeding rod moves forward, the tube blank formed in the cavity of the lower mold can be automatically pushed out. At the same time, when the feeding rod continues to move, a new tube blank can be driven into the cavity of the lower mold. The operation is relatively simple, no additional power equipment needs to be started, and energy can be effectively saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the method of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 It is a rear view structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the split structure of the present invention; Figure 5 It is a structural schematic diagram of the material return mechanism in the present invention; Figure 6 It is a structural schematic diagram of the material return mechanism in the present invention from a second viewing angle; Figure 7 It is a structural schematic diagram of the clamping mechanism in the present invention; Figure 8 It is a structural schematic diagram of the lower mold in the present invention; Fig. 9 It is a structural schematic diagram of the feeding mechanism in the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Bottom plate; 2. Upper mold; 3. Lower mold; 4. Injection pipe; 5. Tube; 6. Loading rod; 7. Placement frame; 8. First sliding frame; 9. First slide groove; 10. First connecting rod; 11. Conveyor belt; 12. One-way bearing; 13. Fixed frame; 14. Second sliding frame; 15. Clamping rod; 16. First spring; 17. Block; 18. Slot; 19. Second spring; 20. Cross bar; 21. Second connecting rod; 22. Support rod; 23. Extrusion frame; 24. Extrusion block; 25. Cylinder; 26. Push rod; 27. Stop rod; 28. L-shaped stop rod. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 9 The present invention provides a technical solution: a system and method for manufacturing a variable wall tube, comprising a bottom plate 1, an upper mold 2 and a lower mold 3 are arranged at the middle position of the bottom plate 1, and the lower mold 3 is fixedly connected to the bottom plate 1; injection pipes 4 are symmetrically arranged at the left and right sides of the lower mold 3; a tube blank 5 is arranged between the upper mold 2 and the lower mold 3; a loading mechanism is arranged at the rear of the upper mold 2 and the lower mold 3, and the loading mechanism is used to automatically put the tube blank 5 to be formed into the mold cavity of the lower mold 3; a material removal mechanism is symmetrically arranged at the left and right sides of the bottom plate 1, and the material removal mechanism is used to automatically take out the tube blank 5 formed in the lower mold 3 from the mold cavity of the lower mold 3; a first driving mechanism is arranged on the bottom plate 1, and the first driving mechanism is used to sequentially drive the loading mechanism and the material removal mechanism to operate; When working, by starting the first driving mechanism, the first driving mechanism will drive the feeding mechanism to operate, and the feeding mechanism will automatically place the tube blank 5 to be processed into the mold cavity on the lower mold 3, and then start the upper mold 2 to move downward to fit the lower mold 3, and then drive the injection pipes 4 on the left and right sides to seal the left and right ends of the tube blank 5 and apply a certain pressure to the tube blank 5; at this time, the injection pipe 4 is started to inject liquid into the tube blank 5, and under the action of the hydraulic pressure in the tube blank 5, the tube blank 5 will fit the mold cavity of the upper mold 2 and the lower mold 3 and gradually take shape; when After the tube blank 5 is formed, the injection tubes 4 on the left and right sides and the upper mold 2 are driven to separate from the formed tube blank 5. At this time, the first driving mechanism will drive the material withdrawal mechanism to automatically take out the formed tube blank 5 from the membrane cavity of the lower mold 3. The device is simple to operate and easy to use. It can automatically place the tube blank 5 into the membrane cavity of the lower mold 3 and automatically take out the tube blank 5 after the tube blank 5 is processed, which can effectively save manpower and quickly complete the loading and unloading of the tube blank 5 processing, which can effectively improve the efficiency of the tube blank 5 processing.

[0020] like Figure 2 , Fig. 9 As shown, as a further solution of the present invention, the feeding mechanism includes a feeding rod 6, the feeding rod 6 is located at the rear side of the lower mold 3 and a placing frame 7 is provided on the feeding rod 6, a tube blank 5 is provided in the placing frame 7 and both the left and right ends of the placing frame 7 are rotatably connected to the feeding rod 6; a dumping mechanism is provided on the feeding rod 6, and the dumping mechanism is used to drive the placing frame 7 to rotate and put the tube blank 5 into the mold cavity of the lower mold 3 when the placing frame 7 moves forward to the feeding position; The dumping mechanism includes a first sliding frame 8, which is located at the bottom of the placement frame 7; first sliding grooves 9 are symmetrically opened on the left and right sides of the loading rod 6, and the left and right ends of the first sliding frame 8 are respectively slidably connected to the first sliding grooves 9 on the left and right sides, and the first sliding frame 8 is located at the frontmost position in the first sliding groove 9; the left and right ends of the first sliding frame 8 are symmetrically rotatably connected to the first connecting rod 10, and the other end of the first connecting rod 10 is rotatably connected to the placement frame 7; When working, the tube blank 5 to be processed is placed in the placement frame 7, and then the loading rack is driven to move forward. When the loading rack moves forward, it drives the placement frame 7 and the tube blank 5 to move forward. When the first sliding frame 8 located at the bottom of the placement frame 7 moves forward to a position in contact with the lower mold 3, the first sliding frame 8 is blocked by the lower mold 3 and cannot continue to move forward. When the loading rod 6 continues to move forward, the first sliding frame 8 will move backward relative to the loading rod 6; when the first sliding frame 8 moves backward relative to the loading rod 6, the first sliding frame 8 will pull the placement frame 7 forward through the two first connecting rods 10 to rotate; when the loading rod 6 drives the placement frame 7 to move to the rear position of the cavity of the lower mold 3, the rotation angle of the placement frame 7 is just enough to make the tube blank 5 inside it fall downward, and the tube blank 5 will automatically fall into the cavity of the lower mold 3 along the placement frame 7; when the loading rod 6 is reset, the placement frame 7 will automatically reset under the action of gravity.

[0021] like Figure 5-7 As shown, as a further solution of the present invention, the material unloading mechanism includes two conveyor belts 11, which are symmetrically distributed on the left and right sides of the lower mold 3; a one-way bearing 12 is fixedly connected to the rotating shaft in the conveyor belt 11, and the one-way bearing 12 is rotatably connected to the bottom plate 1; four clamping mechanisms are evenly spaced on the conveyor belt 11, and the clamping mechanisms are used to clamp the tube blank 5 formed in the mold cavity of the lower mold 3; the lower mold 3 is symmetrically provided with a discharge mechanism, and the discharge mechanism is used to drive the clamping mechanism to release the tube blank 5 when the clamping mechanism clamps the tube blank 5 and drives the tube blank 5 to move to the front position of the lower mold 3; The clamping mechanism includes a fixed frame 13, which is fixedly connected to the conveyor belt 11 and a second sliding frame 14 is slidably connected to the fixed frame 13. A clamping rod 15 is provided in the second sliding frame 14, and the clamping rod 15 is slidably connected to the second sliding frame 14; a first spring 16 is fixedly connected in the clamping rod 15, and the other end of the first spring 16 is fixedly connected to the second sliding frame 14; a clamping block 17 is slidably connected to the second sliding frame 14; a clamping groove 18 is provided on the clamping rod 15, the clamping block 17 is engaged with the clamping groove 18, and a second spring 19 is fixedly connected to the clamping block 17; a cross bar 20 is slidably connected to the side position of the second sliding frame 14, and the second connecting rod 21 is symmetrically rotatably connected at both ends of the cross bar 20, and the other end of the second connecting rod 21 is rotatably connected to the clamping block 17; During operation, when the two conveyor belts 11 are driven, the conveyor belt 11 will drive the four fixed frames 13 connected thereto to move, and the fixed frames 13 will drive the second sliding frames 14 connected thereto to move, and the second sliding frames 14 will drive the clamping rods 15 to move, and when the clamping rods 15 on the left and right sides are respectively moved to the left and right end positions of the formed tube blank 5 in the cavity of the lower mold 3, the clamping rods 15 are driven by the elastic force of the first spring 16 to be inserted into the formed tube blank 5; when the clamping rods 15 on the left and right sides are respectively inserted into the left and right end positions of the formed tube blank 5, the second sliding frames 14 corresponding to the clamping rods 15 are driven to slide upward relative to the fixed frames 13, and the second sliding frames 14 will drive the clamping rods 15 to move upward, and when the clamping rods 15 on the left and right sides move upward, the formed tube blank 5 will be driven to move upward from the cavity of the lower mold 3, and the formed tube blank 5 will be directly separated from the cavity of the lower mold 3; then the conveyor belt 11 is driven to continue to transmit, and the conveyor belt 11 will drive the formed tube blank 5 to move forward.

[0022] like Figure 6 , Figure 8 As shown, as a further solution of the present invention, the discharge mechanism includes two support rods 22, the two support rods 22 are located at the left and right sides of the front of the lower mold 3, and the two support rods 22 are fixedly connected to the bottom plate 1; the left and right sides of the lower mold 3 are symmetrically provided with extrusion racks 23, and the extrusion racks 23 are fixedly connected to the bottom plate 1; the end of the clamping rod 15 away from the lower mold 3 is fixedly connected to two extrusion blocks 24, and the extrusion racks 23 are located on the moving track of the two extrusion blocks 24; During operation, when the conveyor belts 11 on the left and right sides drive the formed tube blank 5 to separate from the mold cavity of the lower mold 3 through the clamping rods 15 on the left and right sides, they will continue to move forward. At this time, the formed tube blank 5 will slowly move to the position above the two support rods 22 and the bottom end of the tube blank 5 will be close to the support rods 22; when the conveyor belt 11 continues to transmit, the two extrusion blocks 24 located on the clamping rod 15 will contact the extrusion frame 23. When the conveyor belt 11 drives the clamping rod 15 to continue to move, the extrusion block 24 will be squeezed by the extrusion frame 23 in the direction away from the formed tube blank 5. The extrusion block 24 drives the clamping rod 15 to move, and the clamping rod 15 will slowly separate from the formed tube blank 5. When the clamping rod 15 separates from the formed tube blank 5, the formed tube blank 5 will automatically fall onto the two support rods 22.

[0023] like Figure 8-9As shown, as a further solution of the present invention, the first driving mechanism includes a cylinder 25, which is located at the rear of the feeding rod 6 and is fixedly connected to the bottom plate 1; the telescopic end of the cylinder 25 is fixedly connected to the feeding rod 6; the front left and right sides of the feeding rod 6 are symmetrically rotatably connected with push rods 26, and the push rods 26 are inclined at forty-five degrees with the front lower and the rear higher; the push rods 26 are on the moving track of the clamping rod 15 above the conveyor belt 11; the front end of the feeding rod 6 is located at the oblique upper position of the push rod 26 and is fixedly connected with a baffle 27, and the baffle 27 is in contact with the oblique upper part of the push rod 26; the left and right sides of the lower mold 3 are provided with trigger mechanisms, and the trigger mechanisms are used to drive the clamping block 17 to disengage from the card slot 18 when the conveyor belt 11 drives the clamping rod 15 to move to the left and right ends of the formed tube blank 5 in the mold cavity of the lower mold 3; The trigger mechanism includes an L-shaped blocking rod 27, which is fixedly connected to the lower mold 3; the L-shaped blocking rod 27 is located on the moving track of the second sliding frame 14 on the upper side of the conveyor belt 11; During operation, the feeding rod 6 can be driven to move forward by starting the cylinder 25. When the feeding rod 6 moves forward, it will drive the push rods 26 on the left and right sides to move forward. When the push rod 26 moves forward and contacts the clamping rod 15 above the conveyor belt 11, it will push the clamping rod 15 to move forward, thereby driving the entire conveyor belt 11 to transmit. When the clamping rod 15 is pushed to the position in contact with the L-shaped blocking rod 27, the L-shaped blocking rod 27 blocks the cross bar 20 on the second sliding frame 14, and the cross bar 20 drives the card block 17 to move upward through the second connecting rod 21. When the card block 17 moves upward, it disengages from the card slot 18. At this time, under the action of the first spring 16, the clamping rod 15 automatically Inserted into the cavity of the lower mold 3; as the push rod 26 continues to move forward, since the second sliding frame 14 is blocked by the L-shaped baffle rod 27, the second sliding frame 14 will move upward along the L-shaped baffle rod 27, and when the second sliding frame 14 moves to the position above the L-shaped baffle rod 27, the baffle rod 27 will continue to push the second sliding frame 14 forward along the L-shaped baffle rod 27, and the conveyor belt 11 will continue to transmit after a brief stop, and the next fixed frame 13 will move to the upper side of the conveyor belt 11; when the loading rod 6 moves backward and resets, the push rod 26 will be blocked by the clamping rod 15 at the rear position, and the push rod 26 will rotate upward to pass the clamping rod 15 and move to the rearmost position.

[0024] like Figure 1 As shown, as a further solution of the present invention, a method for manufacturing a variable wall tube, the specific steps of the method are as follows: Step 1: Start the first driving mechanism, which drives the feeding mechanism and the unloading mechanism to operate alternately; Step 2: When the feeding mechanism is running, the tube blank 5 to be processed will be automatically placed into the mold cavity of the lower mold 3; Step 3: After the tube blank 5 is placed in the mold cavity of the lower mold 3, the upper mold 2 is driven to fit with the lower mold 3, and then the injection pipes 4 on the left and right sides are driven to seal the left and right ends of the tube blank 5 and inject high-pressure liquid into the tube blank 5. The tube blank 5 can be processed into a desired shape by the high-pressure liquid; Step 4: After the processing is completed, the upper mold 2 is driven to separate from the lower mold 3, and the two injection tubes 4 are driven to separate from the tube blank 5. The material withdrawal mechanism will automatically take out the tube blank 5 formed in the mold cavity of the lower mold 3.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable wall tube manufacturing system, comprising a base plate (1), characterized in that: An upper mold (2) and a lower mold (3) are provided at the middle position of the bottom plate (1), and the lower mold (3) is fixedly connected to the bottom plate (1); injection pipes (4) are symmetrically provided at left and right sides of the lower mold (3); a tube blank (5) is provided between the upper mold (2) and the lower mold (3); a loading mechanism is provided at the rear of the upper mold (2) and the lower mold (3), and the loading mechanism is used to automatically put the tube blank (5) to be formed into the mold cavity of the lower mold (3); a material removal mechanism is symmetrically provided at left and right sides of the bottom plate (1), and the material removal mechanism is used to automatically remove the tube blank (5) formed in the lower mold (3) from the mold cavity of the lower mold (3); a first driving mechanism is provided on the bottom plate (1), and the first driving mechanism is used to drive the loading mechanism and the material removal mechanism to operate in sequence.

2. A variable wall tube manufacturing system according to claim 1, characterized in that: The feeding mechanism comprises a feeding rod (6), the feeding rod (6) being located at the rear side of the lower mould (3) and having a placing frame (7) on the feeding rod (6), a tube blank (5) being arranged in the placing frame (7) and both left and right ends of the placing frame (7) being rotatably connected to the feeding rod (6); a tipping mechanism is provided on the feeding rod (6), and the tipping mechanism is used to drive the placing frame (7) to rotate and place the tube blank (5) into the mould cavity of the lower mould (3) when the placing frame (7) moves forward to the feeding position.

3. A variable wall tube manufacturing system according to claim 2, characterized in that: The tipping mechanism comprises a first sliding frame (8), the first sliding frame (8) being located at the bottom of the placement frame (7); first sliding grooves (9) are symmetrically provided on the left and right sides of the loading rod (6), the left and right ends of the first sliding frame (8) are respectively slidably connected to the first sliding grooves (9) on the left and right sides, and the first sliding frame (8) is located at the frontmost position in the first sliding groove (9); the left and right ends of the first sliding frame (8) are symmetrically rotationally connected to the first connecting rod (10), and the other end of the first connecting rod (10) is rotationally connected to the placement frame (7).

4. A variable wall tube manufacturing system according to claim 2, characterized in that: The material unloading mechanism comprises two conveyor belts (11), and the two conveyor belts (11) are symmetrically distributed on the left and right sides of the lower mold (3); a one-way bearing (12) is fixedly connected to the rotating shaft in the conveyor belt (11), and the one-way bearing (12) is rotatably connected to the bottom plate (1); four clamping mechanisms are evenly spaced on the conveyor belt (11), and the clamping mechanisms are used to clamp the tube blank (5) formed in the mold cavity of the lower mold (3); and material unloading mechanisms are symmetrically provided on the left and right sides of the lower mold (3), and the material unloading mechanisms are used to drive the clamping mechanisms to release the tube blank (5) when the clamping mechanisms clamp the tube blank (5) and drive the tube blank (5) to move to the front position of the lower mold (3).

5. A variable wall tube manufacturing system according to claim 4, characterized in that: The clamping mechanism comprises a fixed frame (13), the fixed frame (13) is fixedly connected to the conveyor belt (11), and a second sliding frame (14) is slidably connected to the fixed frame (13), a clamping rod (15) is provided in the second sliding frame (14), and the clamping rod (15) is slidably connected to the second sliding frame (14); a first spring (16) is fixedly connected in the clamping rod (15), and the other end of the first spring (16) is fixedly connected to the second sliding frame (14); a clamping block (17) is slidably connected to the second sliding frame (14); a clamping groove (18) is provided on the clamping rod (15), the clamping block (17) is clamped and matched with the clamping groove (18), and a second spring (19) is fixedly connected to the clamping block (17); a cross bar (20) is slidably connected to the side surface of the second sliding frame (14), and the two ends of the cross bar (20) are symmetrically rotatably connected to second connecting rods (21), and the other end of the second connecting rod (21) is rotatably connected to the clamping block (17).

6. A variable wall tube manufacturing system according to claim 5, characterized in that: The material discharge mechanism comprises two support rods (22), the two support rods (22) are located at left and right sides in front of the lower mold (3), and the two support rods (22) are fixedly connected to the bottom plate (1); extrusion racks (23) are symmetrically provided at left and right sides of the lower mold (3), and the extrusion racks (23) are fixedly connected to the bottom plate (1); the end of the clamping rod (15) away from the lower mold (3) is fixedly connected to two extrusion blocks (24), and the extrusion racks (23) are located on the moving tracks of the two extrusion blocks (24).

7. A variable wall tube manufacturing system according to claim 5, characterized in that: The first driving mechanism comprises a cylinder (25), the cylinder (25) being located at the rear of the feeding rod (6) and being fixedly connected to the bottom plate (1); the telescopic end of the cylinder (25) being fixedly connected to the feeding rod (6); push rods (26) being symmetrically rotatably connected to the left and right sides in front of the feeding rod (6), the push rods (26) being inclined at 45 degrees with the front lower and the rear higher; the push rods (26) being located on the moving track of the clamping rod (15) at the upper position of the conveyor belt (11); a stop rod (27) being fixedly connected to the front end of the feeding rod (6) at the oblique upper position of the push rod (26), the stop rod (27) being in contact with the oblique upper part of the push rod (26); trigger mechanisms are provided at the left and right sides of the lower mold (3), the trigger mechanisms being used to drive the clamping block (17) to disengage from the clamping slot (18) when the conveyor belt (11) drives the clamping rod (15) to move to the left and right ends of the formed tube blank (5) in the mold cavity of the lower mold (3).

8. A variable wall tube manufacturing system according to claim 7, characterized in that: The trigger mechanism comprises an L-shaped blocking rod (27), wherein the L-shaped blocking rod (27) is fixedly connected to the lower mold (3); the L-shaped blocking rod (27) is located on a moving track of the second sliding frame (14) on the upper side of the conveyor belt (11).

9. A method for manufacturing a variable wall tube, applicable to a manufacturing system for a variable wall tube according to any one of claims 1 to 8, characterized in that: The specific steps of this method are as follows: Step 1: Start the first driving mechanism, which drives the feeding mechanism and the unloading mechanism to operate alternately; Step 2: When the loading mechanism is in operation, the tube blank (5) to be processed is automatically placed into the mold cavity on the lower mold (3); Step 3: After the tube blank (5) is placed in the mold cavity of the lower mold (3), the upper mold (2) is driven to fit the lower mold (3), and then the injection pipes (4) on the left and right sides are driven to seal the left and right ends of the tube blank (5) and inject high-pressure liquid into the tube blank (5). The tube blank (5) can be processed into a desired shape by the high-pressure liquid; Step 4: After the processing is completed, the upper mold (2) and the lower mold (3) are driven to separate, and the two injection pipes (4) are driven to separate from the tube blank (5). The material removal mechanism will automatically take out the tube blank (5) formed in the mold cavity of the lower mold (3).

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