Hump pipe forming machine

Abstract

The utility model discloses a hump pipe forming machine, which relates to the technical field of hump pipe processing, solves the problem that the processing precision is influenced because the existing hump pipe forming die is not provided with a clamping mechanism, and specifically comprises a plurality of clamping pieces, a plurality of petal dies, wherein the plurality of petal dies are arranged; clamping the push mold; the pushing and pressing mechanism is in driving connection with the clamping pushing mold; the jacking mechanism comprises a jacking rod capable of moving up and down; the rotary driving mechanism comprises a rotatable chain wheel, a square hole matched with the prism part is formed in the middle of the chain wheel, and the prism part at the lower end of the ejector rod penetrates through the square hole and extends outwards. The clamping push die is jacked upwards through the pushing and pressing mechanism, the clamping push die is in conical surface fit with the multiple clamping pieces, the multiple clamping pieces contract towards the middle under the action of the clamping push die, so that a steel pipe is clamped, diameter expansion and hump machining can be completed without cooperation of an auxiliary clamping mechanism, the structure is simple, operation is convenient, and the machining efficiency is high. And meanwhile, the requirement for machining hump pipes of various lengths can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of hump pipe processing, in particular to a hump pipe forming machine. Background Technique

[0002] The hump pipe belongs to a reducing pipe, and its general processing technology is casting blank, blank shot blasting, and machining. In the machining process, the humps on the hump pipe are processed into shape.

[0003] The hump pipe mold with the publication number of CN111360162A has the problem of low forming accuracy. After the pipe fitting is inserted into the mold, the expansion cone moves up and down driven by the hydraulic cylinder, and the female die turntable can drive the female die to rotate. The movement of the mold is that while the expansion cone moves up and down, the male die moves radially, and at the same time, the male die can rotate at a small angle in the plane, and the female die rotates correspondingly with the male die in the plane. After several reciprocating operations, the hump can be processed into shape. However, after the steel pipe is inserted into the mold, there is no clamping mechanism to clamp and position the steel pipe. If the insertion depth of the steel pipe into the mold is relatively shallow, the steel pipe will deflect, and the center of the steel pipe and the center of the mold will be non-coaxial, affecting the processing accuracy of the hump. At this time, an additional auxiliary device is needed to clamp the upper end of the steel pipe, and then the mold can process the hump into shape. In this way, on the one hand, it will occupy the upper space of the mold and is inconvenient for feeding, and on the other hand, it will also cause inconvenience to the processing of the hump on the steel pipe with a relatively long length. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above problems and design a hump pipe forming machine, which solves the problem that the existing hump pipe forming mold affects the processing accuracy due to the lack of a clamping mechanism.

[0005] To achieve the above object, the technical solution of the utility model is as follows: A hump pipe forming machine includes:

[0006] A plurality of clamping members that can enclose a circle, a limiting cavity is formed between the plurality of clamping members, and an inner concave female die is formed on the inner side of each clamping member;

[0007] A plurality of petal dies that can enclose a circle, and the plurality of petal dies are all located in the limiting cavity. An elastic member that holds the plurality of petal dies is arranged on the periphery of the plurality of petal dies. Each petal die has a mold, the mold is a part of a cylinder, a male die that cooperates with the female die is formed by outward protrusion on the outer side of each mold, and the inner side of the petal die has an inclined surface;

[0008] A clamping and pushing die, the inner side surface of the clamping and pushing die is a conical surface, and the outer side surface of the clamping member is also a conical surface. The clamping and pushing die is connected with the plurality of clamping members in a vertical sliding manner;

[0009] A pushing mechanism, which is drivingly connected to the clamping and pushing die to drive the clamping and pushing die to move up and down;

[0010] A pressing mechanism, the pressing mechanism includes a push rod capable of moving up and down, the upper end of the push rod has a prism portion and a tapered portion, the tapered portion is located at the top of the prism portion, a cavity matching the prism portion and the tapered portion is formed between multiple petal dies, and the tapered portion is in inclined surface fit with the petal die, the lower end of the push rod has a prism portion;

[0011] A rotary driving mechanism, the rotary driving mechanism includes a rotatable sprocket, the middle of the sprocket has a square hole matching the prism portion, and the prism portion at the lower end of the push rod passes through the square hole and extends outwards.

[0012] Preferably, it further includes an upper platen, a lower platen and a fixing plate. The upper platen and the lower platen are connected by a support rod. The fixing plate is fixed to the bottom of the upper platen. There is a limit groove in the middle of the fixing plate, and a through hole is in the middle of the limit groove. Multiple clamping members are evenly distributed in the limit groove, and the clamping and pushing die is slidably connected to the fixing plate up and down.

[0013] Preferably, a sprocket seat is arranged at the bottom of the lower platen, the sprocket is rotatably connected to the sprocket seat, the rotary driving mechanism further includes a servo motor and a speed reducer drivingly connected to the servo motor, and a sprocket is installed at the output end of the speed reducer, and the two sprockets are connected by a chain.

[0014] Preferably, the pressing mechanism includes a small oil cylinder, the oil cylinder is a double-rod oil cylinder, and the double-rod oil cylinder has the push rod.

[0015] Preferably, the pushing mechanism includes a large oil cylinder, the piston rod of the large oil cylinder is fixedly connected to the bottom of the small oil cylinder through a connecting head, the top of the small oil cylinder is fixedly connected to the bottom of the clamping and pushing die, and the push rod is inserted and connected with the piston rod.

[0016] Preferably, the clamping member includes a clamping slider, a clamping die installed inside the clamping slider, and a support plate fixed to the bottom of the clamping slider. The inside of the clamping die has the concave die.

[0017] Preferably, an anti-rotation groove is formed in the clamping slider, the anti-rotation groove extends along the moving direction of the clamping slider, a positioning key is arranged in the anti-rotation groove, one end of the positioning key is fixed to the fixing plate by a bolt, and the other end is slidably connected to the anti-rotation groove.

[0018] Preferably, a guiding bolt is threadedly connected to each clamping slider. The guiding bolt is inserted through the fixed disk and threadedly connected to the clamping slider. A return spring is sleeved on each guiding bolt. The return spring is located outside the fixed disk, and both ends of the return spring are respectively abutted against the fixed disk and the guiding bolt.

[0019] Preferably, a plurality of wear-resistant blocks are arranged on the circumference of the top of the fixed disk. The wear-resistant blocks are fixed to the fixed disk by bolts. The wear-resistant blocks are clamped with the clamping grooves at the bottom of the upper platen, and at the same time, the fixed disk is separated from the upper platen.

[0020] Preferably, a fixed seat is arranged at the bottom of the petal die. A plurality of the petal dies are evenly distributed in the circumferential direction of the fixed seat and are slidably connected to the fixed seat in the radial direction. The inclined surface size inside the petal die gradually shrinks from bottom to top.

[0021] Compared with the prior art, its beneficial effects are as follows:

[0022] In the utility model, the clamping push die is lifted upward by the pushing mechanism. The clamping push die and a plurality of clamping members are in conical surface fit. Under the action of the clamping push die, the plurality of clamping members contract towards the middle, thereby clamping the steel pipe. The jacking mechanism can drive the ejector rod to move upward. The ejector rod and a plurality of petal dies are in inclined surface fit. Under the action of the ejector rod, the plurality of petal dies expand outwards. The punch on the petal die will cooperate with the die cavity on the clamping member to complete the processing of the hump. At the same time, under the drive of the rotary drive mechanism, the ejector rod can drive a plurality of petal dies to rotate together at a small angle. After several reciprocating operations, the processing of the diameter expansion and the hump can be completed without the cooperation of the auxiliary clamping mechanism. The designed radian of the die cavity and the punch both meet the processing standards. Furthermore, the R angle of the transition area of the processed hump steel pipe can also reach the design tolerance requirements. The structure is simple and the operation is convenient. It can ensure the concentricity during the clamping and processing of the steel pipe, and at the same time can meet the processing of hump pipes of various lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structural schematic diagram of the hump pipe forming machine of the utility model;

[0024] Figure 2 is the structural schematic diagram of another perspective of the hump pipe forming machine;

[0025] Figure 3 is the structural schematic diagram of the hump pipe forming machine when the upper platen is removed;

[0026] Figure 4 is the installation structural schematic diagram of the clamping member and the petal die;

[0027] Figure 5 is the structural schematic diagram of the clamping member;

[0028] Figure 6 It is a schematic structural view of the clamping slider in the clamping member;

[0029] Figure 7 It is a schematic view when multiple flap dies are installed on the fixed seat;

[0030] Figure 8 It is Figure 7 a schematic structural view from another perspective of;

[0031] Figure 9 It is a schematic structural view of the flap die;

[0032] Figure 10 It is a schematic structural view from another perspective of the flap die;

[0033] Figure 11 It is a schematic structural view of the sprocket and the guide sleeve;

[0034] Figure 12 It is a schematic structural view of the large oil cylinder;

[0035] Figure 13 It is a schematic assembly structural view of the small oil cylinder and the ejector rod;

[0036] Figure 14 It is a schematic structural view of the ejector rod.

[0037] In the figure, 1. upper platen; 2. lower platen; 3. large oil cylinder; 4. small oil cylinder; 5. rotary drive mechanism; 51. servo motor; 52. reducer; 6. support rod; 7. clamping and pushing die; 8. clamping member; 81. clamping slider; 811. anti-rotation groove; 82. clamping die; 821. female die; 83. pallet; 9. motor mounting seat; 10. fixed disk; 11. sprocket; 111. guide sleeve; 1111. square hole; 12. positioning key; 13. return spring; 14. guide bolt; 15. wear-resistant block; 16. flap die; 161. mold; 1611. male die; 162. step; 163. inclined surface; 17. fixed seat; 18. elastic member; 19. ejector rod; 191. upper ejector rod; 1911. conical part; 1912. prism part; 192. lower ejector rod; 20. piston rod; 21. sprocket seat. Specific embodiments

[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. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0039] As Figures 1 - 4As shown, a preferred embodiment of the utility model proposes a hump tube forming machine, which mainly includes: an upper platen 1, a lower platen 2, a fixed plate 10, a clamping push die 7, a pushing mechanism, a top pressing mechanism, a rotating drive mechanism 5, a clamping member 8, a flap die 16 and other components.

[0040] The upper platen 1 is located above the lower platen 2, and the two are connected by a support rod 6 to form an overall frame. The fixed plate 10 is located at the bottom of the upper platen 1, and a circular limiting groove is provided in the middle of the fixed plate 10. Four clamping members 8 are provided, and the four clamping members 8 are all located in the limiting groove and are evenly distributed along the circumferential direction. Two flap molds 16 are provided, and the six flap molds 16 are all located in the limiting cavity enclosed by the four clamping members 8, and can move freely in the limiting cavity.

[0041] After one end of the steel pipe is inserted into the six flap molds 16, the four clamping parts 8 will shrink toward the middle to clamp the steel pipe, and then the six flap molds 16 will expand radially outward. Each time the six flap molds 16 expand, they will rotate at a small angle. After several reciprocating cycles, the hump can be formed.

[0042] A circular through hole is provided in the middle of the limiting groove on the fixed plate 10, and the through hole is used to facilitate the pressing mechanism to control the six petal molds 16 to expand outwards.

[0043] like Figure 5 As shown, the clamping member 8 is composed of a clamping slider 81, a clamping mold 82 and a support plate 83, and the clamping slider 81, the clamping mold 82 and the support plate 83 are all a quarter of a circle. The clamping slider 81 can slide along the radial direction of the fixed disk 10, and the inner side surface of the clamping mold 82 is an arc surface, which is a quarter of a circle. During processing, the outer wall of the steel pipe can be close to the arc surface. A concave die 821 is formed inwardly on the arc surface, and the concave die 821 is a quarter of the annular structure. The support plate 83 is fixed to the bottom of the clamping slider 81, and is used to hold the six petal molds 16 upward. The limiting cavity formed by the four clamping members 8 limits the six petal molds 16, and at the same time, due to the existence of the support plate 83, the six petal molds 16 will not leave the limiting cavity.

[0044] The clamping push die 7 is also a circular structure, and also has a through hole in the middle of the clamping push die 7. The inner wall of the through hole is conical. At the same time, the lower end of the outer side of the clamping slider 81 is also conical, specifically, one-fourth of the cone. The lower end of the clamping slider 81 is connected to the through hole in the middle of the clamping push die 7 by sliding up and down. When the clamping push die 7 moves up and down, the two conical surfaces cooperate to control the four clamping parts 8 to shrink toward the middle, thereby clamping the steel pipe.

[0045] refer to Figure 7, a fixing base 17 is arranged in the limiting cavity. The fixing base 17 is of an annular structure. Six valve dies 16 are sequentially arranged in the circumferential direction of the fixing base 17 and can slide along the radial direction of the fixing base 17.

[0046] Reference Figure 9 , Figure 10 , the upper part of the valve die 16 bulges to form a mold 161. The mold 161 is one-sixth part of a cylinder. Six valve dies 16 can be closed to form a complete cylinder. A convex mold 1611 bulges on the outer side surface of the mold 161. The shape of the convex mold 1611 is adapted to the shape of the concave mold 821 on the clamping die 82. When the six valve dies 16 expand outwards, they will slide relative to the fixing base 17, and the convex mold 1611 will cooperate with the concave mold 821 to complete the forming of the hump.

[0047] A step 162 is arranged on the outer side of each valve die 16 for carrying a steel pipe. After the steel pipe is inserted into the mold, the lower end of the steel pipe will abut against the step 162. Then, four clamping members 8 will clamp the steel pipe. Then, the six valve dies 16 will expand outwards to complete the forming of the hump and simultaneously expand the inner diameter of the steel pipe.

[0048] A groove is opened on the lower side of the step 162 on the outer side of each valve die 16 for placing an elastic member 18. The elastic member 18 is of an annular structure. In this embodiment, the elastic member 18 is made of polyurethane material and has good resilience. The six valve dies 16 are hooped and held by the elastic member 18. In the original length state of the elastic member 18, the six valve dies 16 are held together. The six valve dies 16 will form a structure similar to a "convex"-shaped cross-section. When the six valve dies 16 are forced to expand outwards, the elastic member 18 will be forced to elongate. When the six valve dies 16 are not stressed, under the action of the elastic member 18, the six valve dies 16 will return to their original positions and be held tightly again.

[0049] In other technical solutions, the elastic member 18 can also adopt an elastic structure such as rubber or spring.

[0050] Such as Figure 1 As shown, there is also a through hole in the middle of the upper platen 1, which is convenient for the steel pipe to be inserted into the mold.

[0051] Reference Figure 3 , in this embodiment, both the top pressing mechanism and the pushing mechanism adopt oil cylinders, namely a small oil cylinder 4 and a large oil cylinder 3 respectively. The strokes of the two oil cylinders are the same. Among them, the large oil cylinder 3 is fixed on the lower platen 2, the small oil cylinder 4 is located at the top of the large oil cylinder 3, and the top of the small oil cylinder 4 is fixedly connected to the bottom of the clamping and pushing die 7.

[0052] Reference Figure 12 , the large oil cylinder 3 has a piston rod 20. The top of the piston rod 20 is fixedly connected to the bottom of the small oil cylinder 4 through a flange.

[0053] Reference Figure 13 The small oil cylinder 4 is a double-rod oil cylinder, and this double-rod oil cylinder has a push rod 19. The push rod 19 is composed of two parts, namely an upper push rod 191 and a lower push rod 192. The upper push rod 191 is located at the top of the small oil cylinder 4. The upper end of the lower push rod 192 passes through the piston rod 20 of the small oil cylinder 4 and is fixedly connected to the bottom of the upper push rod 191, and the lower push rod 192 is fixedly connected to the piston rod 20 of the small oil cylinder 4 and moves up and down together, and the lower push rod 192 can rotate relative to the piston rod 20 of the small oil cylinder 4.

[0054] Reference Figure 14 The upper push rod 191 is composed of two parts, namely a prism part 1912 and a conical part 1911. The shape of the prism part 1912 is quadrangular prism-shaped, and the shape of the conical part 1911 is hexagonal frustum-shaped, or it can also be hexagonal pyramid-shaped. The specific number of edges of the conical part 1911 is determined by the number of the split dies 16. On the inner side surface of each split die 16, there is an inclined surface 163, and the size of this inclined surface 163 gradually shrinks from bottom to top and just fits the outer shape of the conical part 1911.

[0055] Reference Figure 8 When the six split dies 16 are held together, a cavity will be formed in the middle. The shape of this cavity fits the shapes of the conical part 1911 and the prism part 1912. When the small oil cylinder 4 controls the up and down movement of the push rod 19, the upper push rod 191 will insert into the cavity formed between the six split dies 16, and under the cooperation of the conical surface, the six split dies 16 will expand laterally outwards along the radial direction.

[0056] The overall design of the lower push rod 192 can be prism-shaped, or the lower end of the lower push rod 192 with an appropriate length can be designed as prism-shaped.

[0057] As Figure 2 、 Figure 11 shown, a sprocket seat 21 is installed at the bottom of the lower platen 2. There is a sprocket 11 in the middle of the sprocket seat 21. The sprocket 11 is rotatably connected to the sprocket seat 21. A guide sleeve 111 is arranged on the sprocket 11. There is a square hole 1111 penetrating through the guide sleeve 111 to the sprocket 11 in the middle of the guide sleeve 111. The shape of the square hole 1111 fits the prism-shaped shape of the lower push rod 192.

[0058] There is a through hole in the middle of the piston rod 20 of the large oil cylinder 3. The lower push rod 192 will pass through this through hole and be inserted and connected with the square hole 1111 on the guide sleeve 111 and the sprocket 11, and extend downward through the square hole 1111 for a certain length.

[0059] When the sprocket 11 rotates, it drives the lower push rod 192 to rotate, and when the lower push rod 192 rotates, it drives the upper push rod 191 to rotate together. Since the upper push rod 191 also has a prism portion 1912, and the prism portion 1912 is inserted into the cavity formed by the six flap molds 16 embracing each other, when the upper push rod 191 rotates, it drives the six flap molds 16 to rotate together with the fixing seat 17. Each time the six flap molds 16 expand outwards, the six flap molds 16 and the fixing seat 17 will rotate once at a small angle driven by the upper push rod 191, and then the six flap molds 16 will expand outwards again, and this reciprocating process will eventually complete the diameter expansion and hump forming of the steel pipe.

[0060] like Figure 1 , Figure 2 As shown, the rotary drive mechanism 5 is composed of a servo motor 51 and a reducer 52 connected to the servo motor 51. A sprocket 11 is installed at the output end of the reducer 52. The two sprockets 11 are connected by a chain. The reducer 52 is fixedly mounted on the motor mounting seat 9, and the motor mounting seat 9 is fixedly mounted on one side of the lower platen 2. When the servo motor 51 rotates, the sprocket 11 is driven to rotate slowly under the action of the reducer 52, and then the chain drives another sprocket 11 to rotate slowly, which in turn drives the upper push rod 191 to rotate, and drives the six petal molds 16 and the fixed seat 17 to rotate at a small angle.

[0061] During operation, the large oil cylinder 3 drives the small oil cylinder 4 to move upward, and the small oil cylinder 4 lifts the clamping push die 7 upward. At this time, the lower push rod 192 also moves upward synchronously, but the lower push rod 192 is always inserted into the square hole 1111 of the guide sleeve 111 and does not disengage. In the process of the clamping push die 7 moving upward, the four clamping members 8 are driven to move toward the center under the cooperation of the conical surface to clamp the steel pipe.

[0062] The small oil cylinder 4 then controls the upper push rod 191 to move upward. During the upward movement of the upper push rod 191, the lower push rod 192 will also move upward synchronously, and the lower push rod 192 will always be inserted into the square hole 1111 of the guide sleeve 111 and will not be disengaged. The upper push rod 191 will control the six flap molds 16 to expand outward along the radial direction of the fixed seat 17 with the cooperation of the conical surface, and expand the diameter and hump the steel pipe. Then the servo motor 51 controls the lower push rod 192 and the upper push rod 191 to rotate once at a small angle. When the upper push rod 191 rotates, it drives the six flap molds 16 and the fixed seat 17 to rotate once at a small angle, and this reciprocating movement finally completes the expansion and hump processing of the steel pipe.

[0063] refer to Figure 4 , Figure 6, when the six valve dies 16 and the fixed seat 17 rotate, it is possible to drive the four clamping members 8 to rotate synchronously. Therefore, in order to prevent the four clamping members 8 from rotating, an anti-rotation groove 811 is provided at the top of each clamping slider 81, and the anti-rotation groove 811 extends radially. A positioning key 12 is provided in each anti-rotation groove 811. The positioning key 12 is slidably connected to the guide groove. The other end of the positioning key 12 is engaged with the groove on the circumference of the fixed disk 10 and fixed by bolts. The cooperation between the positioning key 12 and the anti-rotation groove 811 can prevent the clamping member 8 from rotating and also play a guiding role.

[0064] A guiding bolt 14 is provided on the outside of each clamping slider 81. The guiding bolt 14 passes through the fixed disk 10 horizontally and is threadedly connected to the clamping slider 81. A return spring 13 is sleeved on the guiding bolt 14. The return spring 13 is located outside the fixed disk 10, and both ends of the return spring 13 are abutted against the fixed disk 10 and the guiding bolt 14 respectively.

[0065] When the clamping push die 7 applies an upward top pressure so that the four clamping members 8 contract inward to clamp the steel pipe, the guiding bolt 14 will move synchronously and the return spring 13 will be compressed under force. After the clamping push die 7 removes the applied top pressure, under the action of the return spring 13, the four clamping members 8 will return to their original positions and loosen the steel pipe.

[0066] After long-term operation, the upper surface of the fixed disk 10 and the lower surface of the upper platen 1 will be worn due to relative friction. It is too costly to replace the entire fixed disk 10. Therefore, a number of wear-resistant blocks 15 are provided on the circumference of the top of the fixed disk 10. The wear-resistant blocks 15 are fixed to the fixed disk 10 by bolts. The other end of the wear-resistant block 15 extends to the upper surface of the clamping slider 81, and can limit the upward movement of the clamping slider 81. The wear-resistant block 15 will separate the fixed disk 10 from the upper platen 1 so that the two do not contact. After the wear-resistant block 15 is worn, only the wear-resistant block 15 needs to be replaced, and there is no need to replace the entire fixed disk 10, thereby reducing the maintenance cost.

[0067] At the bottom of the upper platen 1, a number of clamping grooves are provided along the circumference of the through hole for accommodating the wear-resistant block 15 and the positioning key 12. The depth of the clamping groove is relatively shallow, which can play a clamping role to prevent the fixed disk 10 from rotating, and at the same time ensure that the fixed disk 10 and the upper platen 1 do not contact. The fixed disk 10 will be fixedly connected to the upper platen 1 by bolts.

[0068] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to some parts by those skilled in the art of the present technology all reflect the principles of the present invention and are within the protection scope of the present invention.

Claims

1. A hump-shaped tube forming machine, characterized in that, Comprising: A plurality of clamping members (8) capable of enclosing a circle, a limiting cavity is formed between the plurality of clamping members (8), and a concave die (821) is formed by inward depression on the inner side of each clamping member (8); A plurality of split dies (16) capable of enclosing a circle, the plurality of split dies (16) are all located in the limiting cavity, an elastic member (18) for holding the plurality of split dies (16) is arranged on the periphery of the plurality of split dies (16), a mold (161) is provided on each split die (16), the mold (161) is a part of a cylinder, a convex die (1611) matching with the concave die (821) is formed by outward protrusion on the outer side of each mold (161), and an inclined surface (163) is provided on the inner side of the split die (16); A clamping push die (7), the inner side surface of the clamping push die (7) is a conical surface, the outer side surface of the clamping member (8) is also a conical surface, and the clamping push die (7) is connected with the plurality of clamping members (8) in a vertically sliding manner; A pressing mechanism, the pressing mechanism is drivingly connected with the clamping push die (7) to drive the clamping push die (7) to move up and down; A jacking mechanism, the jacking mechanism includes a jacking rod (19) capable of moving up and down, the upper end of the jacking rod (19) has a prism portion (1912) and a conical portion (1911), the conical portion (1911) is located at the top of the prism portion (1912), a cavity matching with the prism portion (1912) and the conical portion (1911) is formed by enclosing between the plurality of split dies (16), and the conical portion (1911) is in inclined surface (163) cooperation with the split die (16), and the lower end of the jacking rod (19) has a prism portion (1912); A rotary driving mechanism (5), the rotary driving mechanism (5) includes a rotatable sprocket (11), a square hole (1111) matching with the prism portion (1912) is provided in the middle of the sprocket (11), and the prism portion (1912) at the lower end of the jacking rod (19) passes through the square hole (1111) and extends outwards.

2. The hump tube forming machine according to claim 1, characterized in that, It further includes an upper platen (1), a lower platen (2) and a fixing plate (10), the upper platen (1) and the lower platen (2) are connected by a support rod (6), the fixing plate (10) is fixed at the bottom of the upper platen (1), a limiting groove is provided in the middle of the fixing plate (10), a through hole is provided in the middle of the limiting groove, and the plurality of clamping members (8) are evenly distributed in the limiting groove, and the clamping push die (7) is connected with the fixing plate (10) in a vertically sliding manner.

3. The hump tube forming machine according to claim 2, wherein A sprocket seat (21) is arranged at the bottom of the lower platen (2), the sprocket (11) is rotatably connected with the sprocket seat (21), the rotary driving mechanism (5) further includes a servo motor (51) and a speed reducer (52) drivingly connected with the servo motor (51), the output end of the speed reducer (52) is provided with a sprocket (11), and the two sprockets (11) are connected by a chain.

4. The hump tube forming machine according to claim 3, characterized in that, The jacking mechanism includes a small oil cylinder (4), the small oil cylinder (4) is a double-rod oil cylinder, and the double-rod oil cylinder has the jacking rod (19).

5. A hump tube forming machine according to claim 4, characterized in that, The pushing mechanism includes a large oil cylinder (3). The piston rod (20) of the large oil cylinder (3) is fixedly connected to the bottom of the small oil cylinder (4) through a connector. The top of the small oil cylinder (4) is fixedly connected to the bottom of the clamping and pushing die (7). The ejector rod (19) is inserted and connected with the piston rod (20).

6. The hump tube forming machine according to claim 2, characterized in that, The clamping member (8) includes a clamping slider (81), a clamping die (82) installed inside the clamping slider (81), and a support plate (83) fixed to the bottom of the clamping slider (81). The inner side of the clamping die (82) has the female die (821).

7. The hump tube forming machine according to claim 6, characterized in that, An anti-rotation groove (811) is formed in the clamping slider (81). The anti-rotation groove (811) extends along the moving direction of the clamping slider (81). A positioning key (12) is arranged in the anti-rotation groove (811). One end of the positioning key (12) is fixed to the fixed disk (10) by a bolt, and the other end is slidably connected with the anti-rotation groove (811).

8. The hump tube forming machine according to claim 6, characterized in that, A guiding bolt (14) is threadedly connected to each clamping slider (81). The guiding bolt (14) is inserted through the fixed disk (10) and threadedly connected with the clamping slider (81). A return spring (13) is sleeved on each guiding bolt (14). The return spring (13) is located outside the fixed disk (10), and both ends of the return spring (13) are abutted against the fixed disk (10) and the guiding bolt (14) respectively.

9. The hump tube forming machine according to claim 2, characterized in that, A number of wear-resistant blocks (15) are arranged on the circumference of the top of the fixed disk (10). The wear-resistant blocks (15) are fixed to the fixed disk (10) by bolts. The wear-resistant blocks (15) are clamped with the card slots at the bottom of the upper platen (1), and at the same time, the fixed disk (10) is separated from the upper platen (1).

10. The hump tube forming machine according to claim 1, characterized in that, A fixed seat (17) is arranged at the bottom of the split die (16). A plurality of split dies (16) are evenly distributed in the circumferential direction of the fixed seat (17) and are radially slidably connected with the fixed seat (17). The size of the inclined surface (163) inside the split die (16) gradually decreases from bottom to top.

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