Flaring forming device for plastic pipe

Abstract

The utility model discloses a flaring forming device for a plastic pipe. Comprising a first machine tool, a second machine tool, a plurality of conveying rollers rotationally arranged on the first machine tool, a pair of movable clamping blocks sliding on a workbench, a pair of fixed clamping blocks fixed to the workbench, a first sliding assembly driving the two movable clamping blocks to slide, a pair of fixed heating blocks fixed to the workbench and a movable heating block sliding on the workbench. The second sliding assembly drives the movable heating block, the first hydraulic cylinder is fixed to the second machine tool, the rotating shaft is rotationally connected with the end of a piston rod of the first hydraulic cylinder, the rotating assembly drives the rotating shaft to rotate, the rotating plate is fixedly connected to the other end of the rotating shaft, the flaring rod is fixed to one side of the rotating plate, and the flaring head is fixed to one end of the flaring rod. The flaring device has the advantages that the flaring processing interval time of the plastic pipe is shortened, and the flaring processing of the plastic pipe is efficient.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe manufacturing technology, and in particular to a flaring and forming device for plastic pipes. Background Technology

[0002] Currently, plastic pipes typically require flaring at one end for easier connection and installation. Existing flaring processes for plastic pipes generally use flaring machines. The flaring principle involves heating and softening the pipe end using an oven or other heating equipment. Then, a hydraulic cylinder or similar device pushes a flaring mold precisely into the pipe end, applying radial pressure. Under this pressure, the pipe end gradually deforms and slowly expands until the desired effect is achieved. The mold is then removed, and the pipe is allowed to cool, completing the flaring process. However, in practice, these flaring machines can only flare one plastic pipe at a time. Furthermore, the long heating and softening time for each pipe results in excessively long intervals between flaring operations, leading to low flaring efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a flaring and forming device for plastic pipes, which can shorten the flaring processing interval of plastic pipes and efficiently flare plastic pipes.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a flaring and forming device for plastic pipes, comprising a pipe conveying mechanism, a pipe fixing and positioning mechanism, a pipe heating mechanism and a pipe flaring mechanism arranged in sequence, wherein the pipe conveying mechanism includes a machine tool and a plurality of conveying rollers that are parallel and spaced apart and horizontally rotated on the machine tool, wherein the pipe fixing and positioning mechanism includes a worktable, a pair of movable clamping blocks that are symmetrically arranged and slidably arranged on the worktable, a pair of fixed clamping blocks that are symmetrically arranged and fixedly arranged on the worktable, and a sliding assembly for driving the two movable clamping blocks to slide relative to the worktable, wherein the two fixed clamping blocks are located between the two movable clamping blocks, and the two movable clamping blocks move closer to or further away from the two fixed clamping blocks respectively;

[0005] The pipe heating mechanism includes a pair of fixed heating blocks fixed on the worktable and symmetrical to each other, a movable heating block slidably disposed on the worktable and located between the two fixed heating blocks, and a sliding component two for driving the movable heating block to slide relative to the worktable. The fixed heating block is provided with a semi-circular arc-shaped heating groove one on the side close to the movable heating block, and the movable heating block is provided with semi-circular arc-shaped heating groove two on both sides. When the movable heating block and a fixed heating block are in close contact with each other, the heating groove two on one side of the movable heating block can combine with the heating groove one on the fixed heating block to form a cylindrical heating chamber.

[0006] The pipe flaring mechanism includes a second machine tool, a first hydraulic cylinder fixed on the second machine tool, a rotating shaft rotatably connected to the piston rod end of the first hydraulic cylinder at one end, a rotating assembly driving the rotating shaft to rotate, a rotating plate fixedly connected to the other end of the rotating shaft, a flaring rod fixed to one side of the rotating plate, and a flaring head fixed to one end of the flaring rod and shaped like a horn. The worktable is fixed on the second machine tool. A connecting hole is opened at the end of the rotating shaft away from the rotating plate. A connecting post is fixedly installed at the piston rod end of the first hydraulic cylinder, which is rotatably inserted into the connecting hole. The outer diameter of the connecting post is larger than the outer diameter of the piston rod of the first hydraulic cylinder. A limiting ring is screwed to the end of the rotating shaft and fitted onto the piston rod of the first hydraulic cylinder. The limiting ring prevents the connecting post from leaving the connecting hole. The retractable piston rod of the first hydraulic cylinder allows the rotating plate to move closer to or away from the fixed heating block or movable heating block on the worktable. The flaring rod and the flaring head are located between the rotating plate and the fixed heating block. When the rotating plate is close to the fixed heating block, the flaring head can extend into the heating chamber.

[0007] A further feature of this invention is that: two arc-shaped positioning grooves are formed around the conveyor roller on its surface, and when the two plastic pipes are placed in the two arc-shaped positioning grooves, the ends of the two plastic pipes are coaxial with the heating grooves on one side of the two heating blocks; an arc-shaped positioning groove is formed on the opposite side of the fixed clamping block and the movable clamping block, and when the wall of the plastic pipe contacts the arc-shaped positioning groove, the end of the plastic pipe is coaxial with the heating groove.

[0008] A further feature of this invention is that a height adjustment assembly is fixedly installed on each of the four legs of the machine tool. The height adjustment assembly includes an L-shaped support base fixed to one side of one leg of the machine tool, a nut fixed to the L-shaped support base, a screw threaded to the nut and vertically rotating through the L-shaped support base, and a circular support plate fixed to the lower end of the screw and in contact with the ground.

[0009] A further feature of this invention is that: two parallel dovetail guide rails are fixedly installed on the workbench; the movable clamping block and the fixed clamping block are respectively provided with dovetail grooves that slide on the two dovetail guide rails; the top of the fixed clamping block is provided with two threaded holes that connect the two dovetail grooves; and a locking screw for locking the sliding of the fixed clamping block is threadedly connected to the threaded hole.

[0010] A further feature of this invention is that the sliding assembly includes a pair of hydraulic cylinders fixed to the machine tool, a movable plate fixed to the piston rod ends of the two hydraulic cylinders, and a connecting rod fixed to one side of the movable plate and simultaneously connected to the top of the two movable clamping blocks. The hydraulic cylinders are located on one side of the worktable, and the extension and retraction of the piston rods of the hydraulic cylinders can cause the movable plate to move closer to or away from the fixed clamping block on the worktable. When the movable plate moves, the connecting rod causes one movable clamping block to slide towards a fixed clamping block, and the other movable clamping block will slide away from the other fixed clamping block.

[0011] A further feature of this invention is that: a sliding sleeve is fixedly provided at the top of the movable clamping block for the connecting rod to slide through; a threaded hole 2 is opened at the top of the sliding sleeve to communicate with its interior; and a locking screw 2 for locking the sliding sleeve is threadedly connected to the threaded hole 2.

[0012] A further feature of this invention is that the sliding component two includes a connecting rod two fixed to one side of the moving plate and a connecting seat fixed to the top of the movable heating block and fixedly connected to one end of the connecting rod two.

[0013] A further feature of this invention is that the rotating assembly includes a connecting rod three fixed to one side of the moving plate, a U-shaped plate fixedly connected to the middle of the connecting rod three at both ends, a plurality of short teeth uniformly fixed to the inner bottom of the U-shaped plate, and a plurality of long teeth uniformly fixed to the side wall of the rotating shaft and meshing with the short teeth. The rotating shaft passes through the middle of the U-shaped plate and rests on the inner bottom of the U-shaped plate. The length of the long teeth is longer than the length of the short teeth, and the length of the long teeth is not less than the moving distance of the rotating plate.

[0014] A further feature of this invention is that an L-shaped support base 2 is provided on the machine tool 2, and a connecting rod 3 slides through the L-shaped support base 2, and the U-shaped plate is located between the L-shaped support base 2 and the movable plate.

[0015] A further feature of this invention is that the two fixed heating blocks are jointly and fixedly connected to two pairs of guide rods, and the two pairs of guide rods slide through the movable heating block together, with the two pairs of guide rods located on the upper and lower sides of heating groove one or heating groove two, respectively.

[0016] The beneficial effects of this utility model are as follows: By using the above-mentioned flaring forming device, when flaring plastic pipes, firstly, one pipe is placed in an arc-shaped groove on the side of the conveying roller, and the position of the pipe is adjusted so that the end of the plastic pipe extends into the heating chamber formed by the combination of the heating groove on the side of the movable heating block and the heating groove on the side of the fixed heating block, for heating and softening. At the same time, another pipe is placed in another arc-shaped groove on the side of the conveying roller, and the position is adjusted so that the end of the plastic pipe stays in the heating groove on the side of another fixed heating block, ready for heating and softening.

[0017] After the first pipe end has been heated and softened, the sliding component 2 will drive the movable heating block to slide away from the pipe and move towards the second pipe until the heating groove 2 on the other side of the movable heating block and the heating groove 1 next to the second pipe combine to form a heating chamber, thereby heating and softening the end of the second pipe; at the same time, the sliding component 1 will drive a movable clamping block to approach the first pipe and cooperate with a fixed clamping block to clamp and fix the first pipe.

[0018] Then, once the first pipe is clamped and fixed, the hydraulic cylinder will extend its piston rod, causing the rotating plate and its flaring rod to approach the end of the plastic pipe. The flaring head will then be inserted into the end of the pipe, which has been heated, softened, and processed, under the movement of the flaring rod, thereby flaring the first pipe.

[0019] Finally, once the flaring process of the first pipe is completed, the heating and softening of the second pipe also ends. At this time, sliding component one and sliding component two will drive the movable clamping block and movable heating block to move in opposite directions, thereby not only releasing the fixation of the first pipe and ending the heating and softening process of the second pipe, but also driving the rotating component to rotate the rotating shaft, causing the rotating plate to flip and the flaring rod and flaring head to align with the end of the second pipe. At the same time, sliding component one will also drive another movable clamping block to approach the second pipe and, together with another fixed clamping block, clamp the second pipe. Once hydraulic cylinder one extends its piston rod, the final flaring process of the second pipe can be carried out. During the flaring process of the second pipe, the operator can remove the first pipe and insert a new pipe for end heating and softening, thereby repeating the above operation to achieve continuous plastic pipe flaring processing.

[0020] The above-mentioned plastic pipe flaring process, by simultaneously heating and softening two pipes and flaring them separately, not only effectively shortens the interval between the plastic pipes, but also saves time in loading and unloading the pipes, thus achieving the effect of efficient flaring processing of plastic pipes. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0023] Figure 2This is a schematic diagram of the pipe positioning mechanism and pipe flaring mechanism in this embodiment;

[0024] Figure 3 This is a schematic diagram showing the connection relationship between the piston rod and the rotating shaft of the hydraulic cylinder in this embodiment;

[0025] Figure 4 yes Figure 1 Enlarged view of point A;

[0026] Figure 5 yes Figure 2 Enlarged view of point B;

[0027] In the diagram, 1. Pipe conveying mechanism; 11. Machine tool one; 12. Conveying roller; 121. Arc-shaped positioning groove one; 13. Height adjustment component; 131. L-shaped support seat one; 132. Nut; 133. Screw; 134. Circular support plate; 2. Pipe fixing and positioning mechanism; 21. Worktable; 211. Dovetail guide rail; 22. Movable clamping block; 221. Sliding sleeve; 222. Threaded hole two; 223. Locking screw two; 23. Fixed clamping block; 231. Arc-shaped positioning groove two; 232. Dovetail slide; 233. Threaded hole one; 234. Locking screw one; 24. Sliding component one; 241. Hydraulic cylinder two; 242. Moving plate ; 243. Connecting rod one; 3. Pipe heating mechanism; 31. Fixed heating block; 311. Heating groove one; 312. Guide rod; 32. Movable heating block; 321. Heating groove two; 33. Sliding component two; 331. Connecting rod two; 332. Connecting seat; 4. Pipe flaring mechanism; 41. Machine tool two; 411. L-shaped support seat two; 42. Hydraulic cylinder one; 421. Connecting column; 43. Rotating shaft; 431. Connecting hole; 432. Limiting ring; 44. Rotating component; 441. Connecting rod three; 442. U-shaped plate; 443. Short tooth; 444. Long tooth; 45. Rotating plate; 46. Flaring rod; 47. Flaring head. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example: A flaring and forming device for plastic pipes, such as... Figure 1-5As shown, the device includes a pipe conveying mechanism 1, a pipe fixing and positioning mechanism 2, a pipe heating mechanism 3, and a pipe flaring mechanism 4 arranged in sequence. The pipe conveying mechanism 1 includes a machine tool 11 and multiple parallel and horizontally rotating conveying rollers 12. The pipe fixing and positioning mechanism 2 includes a worktable 21, a pair of symmetrical movable clamping blocks 22 slidably disposed on the worktable 21, a pair of symmetrical fixed clamping blocks 23 fixedly disposed on the worktable 21, and a sliding assembly 24 that drives the two movable clamping blocks 22 to slide relative to the worktable 21. The two fixed clamping blocks 23 are located between the two movable clamping blocks 22, and the two movable clamping blocks 22 move closer to or further away from the two fixed clamping blocks 23 respectively.

[0030] The pipe heating mechanism 3 includes a pair of fixed heating blocks 31 fixed on the workbench 21 and symmetrical to each other, a movable heating block 32 slidably disposed on the workbench 21 and located between the two fixed heating blocks 31, and a sliding component 33 for driving the movable heating block 32 to slide relative to the workbench 21. The fixed heating block 31 is provided with a semi-circular arc-shaped heating groove 311 on the side near the movable heating block 32, and the movable heating block 32 is provided with semi-circular arc-shaped heating grooves 321 on both sides. When the movable heating block 32 and a fixed heating block 31 are in close contact with each other, the heating groove 321 on one side of the movable heating block 32 can combine with the heating groove 311 on the fixed heating block 31 to form a cylindrical heating chamber.

[0031] The pipe flaring mechanism 4 includes a second machine tool 41, a first hydraulic cylinder 42 fixed on the second machine tool 41, a rotating shaft 43 rotatably connected to the piston rod end of the first hydraulic cylinder 42 at one end, a rotating assembly 44 driving the rotating shaft 43 to rotate, a rotating plate 45 fixedly connected to the other end of the rotating shaft 43, a flaring rod 46 fixed to one side of the rotating plate 45, and a flaring head 47 fixed to one end of the flaring rod 46 and shaped like a flare. The worktable 21 is fixed on the second machine tool 41. A connecting hole 431 is provided at the end of the rotating shaft 43 away from the rotating plate 45. A rotatable insertion connecting hole 43 is fixedly provided at the piston rod end of the first hydraulic cylinder 42. The connecting post 421 inside is larger than the outer diameter of the piston rod of the hydraulic cylinder 42. The end of the rotating shaft 43 is screwed with a limiting ring 432 that is fitted with the piston rod of the hydraulic cylinder 42. The limiting ring 432 prevents the connecting post 421 from leaving the connecting hole 431. The hydraulic cylinder 42 extends and retracts the piston rod, which can make the rotating plate 45 approach or move away from the fixed heating block 31 or the movable heating block 32 on the worktable 21. The flaring rod 46 and the flaring head 47 are located between the rotating plate 45 and the fixed heating block 31. When the rotating plate 45 approaches the fixed heating block 31, the flaring head 47 can extend into the heating chamber.

[0032] Furthermore, two arc-shaped positioning grooves 121 are formed around the surface of the conveyor roller 12. When the two plastic tubes are placed in the two arc-shaped positioning grooves 121, the ends of the two plastic tubes are coaxial with the heating grooves 311 on one side of the two heating blocks. Arc-shaped positioning grooves 231 are formed on the opposite side of the fixed clamping block 23 and the movable clamping block 22. When the wall of the plastic tube contacts the arc-shaped positioning groove 231, the end of the plastic tube is coaxial with the heating groove 311. By using the aforementioned arc-shaped positioning grooves 121 and 231, the position of the plastic tube can be effectively positioned to ensure that the flared opening 47 is stably aligned with the end of the inserted plastic tube.

[0033] Furthermore, height adjustment components 13 are fixedly installed on the four legs of the machine tool 11. Each height adjustment component 13 includes an L-shaped support base 131 fixed to one side of the machine tool 11 leg, a nut 132 fixed to the L-shaped support base 131, a screw 133 threadedly connected to the nut 132 and vertically rotating through the L-shaped support base 131, and a circular support plate 134 fixed to the lower end of the screw 133 and in contact with the ground. By employing the aforementioned height adjustment components 13, the conveying height of the conveying roller 12 can be adjusted by adjusting the height of the machine tool 11, thereby ensuring the accurate conveying of plastic pipes by the pipe conveying mechanism 1.

[0034] Furthermore, two parallel dovetail guide rails 211 are fixedly installed on the worktable 21. The movable clamping block 22 and the fixed clamping block 23 are each provided with dovetail grooves 232 that slide on the two dovetail guide rails 211. The top of the fixed clamping block 23 has two threaded holes 233 that connect the two dovetail grooves 232. Locking screws 234 are threadedly connected to the threaded holes 233 to lock the sliding of the fixed clamping block 23. By using the dovetail guide rails 211, not only can the sliding stability of the movable clamping block 22 be ensured, but also, in conjunction with the threaded holes 233 and the locking screws 234, the position and spacing of the two fixed clamping blocks 23 on the worktable 21 can be adjusted, thereby ensuring that the pipe positioning and fixing structure can accurately clamp and fix the plastic pipe.

[0035] Furthermore, the sliding assembly 24 includes a pair of hydraulic cylinders 241 fixed to the machine tool 241, a movable plate 242 fixed to the piston rod ends of the two hydraulic cylinders 241, and a connecting rod 243 fixed to one side of the movable plate 242 and simultaneously fixedly connected to the top of the two movable clamping blocks 22. The hydraulic cylinders 241 are located on one side of the worktable 21, and the extension and retraction of the piston rods of the hydraulic cylinders 241 can make the movable plate 242 approach or move away from the fixed clamping block 23 on the worktable 21. When the movable plate 242 moves, the connecting rod 243 causes one movable clamping block 22 to slide towards one fixed clamping block 23, and the other movable clamping block 22 will slide away from the other fixed clamping block 23.

[0036] By employing the aforementioned sliding component 24, when clamping and fixing a plastic pipe, the hydraulic cylinder 241 first extends or retracts its piston rod, causing the moving plate 242 to move closer to or further away from the worktable 21. Then, the connecting rod 243 on one side of the moving plate 242, under the movement of the moving plate 242, drives a movable clamping block 22 to move closer to the plastic pipe to be clamped and fixed. Finally, in conjunction with the fixed clamping block 23 next to the plastic pipe, the plastic pipe can be clamped and fixed. At the same time, the other movable clamping block 22 will slide away from the other fixed clamping block 23, thereby releasing the clamping and fixing of the plastic pipe that has already undergone flaring between the two.

[0037] Furthermore, a sliding sleeve 221 is fixedly provided at the top of the movable clamping block 22 for the connecting rod 243 to slide through. A threaded hole 222 is formed at the top of the sliding sleeve 221, and a locking screw 223 is threadedly connected to the threaded hole 222 to lock the sliding sleeve 221. By using the aforementioned sliding sleeve 221, threaded hole 222, and locking screw 223, the positions of the two movable clamping blocks 22 on the connecting rod 243 can be adjusted, thereby ensuring that the pipe positioning and fixing structure can accurately clamp and fix the plastic pipe.

[0038] Furthermore, the sliding component 2 33 includes a connecting rod 2 331 fixed to one side of the moving plate 242 and a connecting seat 332 fixed to the top of the movable heating block 32 and fixedly connected to one end of the connecting rod 2 331. By adopting the above-mentioned sliding component 2 33, the movement of the moving plate 242 in the sliding component 1 24 can be fully utilized to achieve the effect of automatic sliding of the movable heating block 32.

[0039] Furthermore, the rotating assembly 44 includes a connecting rod 3 441 fixed to one side of the moving plate 242, a U-shaped plate 442 fixedly connected to the middle of the connecting rod 3 441 at both ends, a plurality of short teeth 443 uniformly fixed to the inner bottom of the U-shaped plate 442, and a plurality of long teeth 444 uniformly fixed to the side wall of the rotating shaft 43 engaging the short teeth 443. The rotating shaft 43 passes through the middle of the U-shaped plate 442 and rests on the inner bottom of the U-shaped plate 442. The length of the long teeth 444 is longer than the length of the short teeth 443, and the length of the long teeth 444 is not less than the moving distance of the rotating plate 45. By using the above-mentioned rotating assembly 44, not only can the movement of the moving plate 242 in the sliding assembly 24 be fully utilized to achieve the effect of automatic rotation of the rotating shaft 43, but also the fact that the rotating shaft 43 rests on the inner bottom of the U-shaped plate 442 can prevent the rotating shaft 43 from being suspended for a long time, thereby ensuring the stability of the movement and rotation of the rotating shaft 43.

[0040] Furthermore, the machine tool 2 41 is provided with an L-shaped support base 2 411, and the connecting rod 3 441 slides through the L-shaped support base 2 411. The U-shaped plate 442 is located between the L-shaped support base 2 411 and the moving plate 242. By using the above-mentioned L-shaped support base 2 411, the suspended end of the connecting rod 3 441 can be supported, thereby ensuring the sliding stability of the connecting rod 3 441.

[0041] Furthermore, the two fixed heating blocks 31 are jointly and fixedly connected to two pairs of guide rods 312, and the two pairs of guide rods 312 slide through the movable heating block 32. The two pairs of guide rods 312 are located on the upper and lower sides of the first heating groove 311 or the second heating groove 321, respectively. By using the above-mentioned guide rods 312, not only can the sliding stability of the movable heating block 32 be ensured, but also the first heating groove 311 on both sides of the movable heating block 32 and the second heating groove 321 on one side of the fixed heating block 31 can be stably and accurately combined to form a heating chamber.

[0042] The working principle of this embodiment:

[0043] When flaring plastic pipes, first place one pipe in an arc-shaped groove on the side of the conveyor roller 12 and adjust the position of the pipe so that the end of the plastic pipe extends into the heating chamber formed by the heating groove 321 on the side of the movable heating block 32 and the heating groove 311 on the side of the fixed heating block 31 for heating and softening. At the same time, place another pipe in another arc-shaped groove on the side of the conveyor roller 12 and adjust the position so that the end of the plastic pipe stays in the heating groove 311 on the side of the other fixed heating block 31 for heating and softening.

[0044] After the first pipe end has been heated and softened, the sliding component 2 33 will drive the movable heating block 32 to slide away from the pipe and move towards the second pipe until the heating groove 2 321 on the other side of the movable heating block 32 and the heating groove 1 311 next to the second pipe combine to form a heating chamber, thereby heating and softening the end of the second pipe; at the same time, the sliding component 1 24 will drive a movable clamping block 22 to approach the first pipe and cooperate with a fixed clamping block 23 to clamp and fix the first pipe.

[0045] Then, once the first pipe is clamped and fixed, the hydraulic cylinder 42 will extend its piston rod, causing the rotating plate 45 and its flaring rod 46 to approach the end of the plastic pipe. The flaring head 47 will be inserted into the end of the pipe that has been heated, softened and processed, under the movement of the flaring rod 46, thereby flaring the first pipe in this way.

[0046] Finally, once the flaring process of the first pipe is completed, the heating and softening of the second pipe also ends. At this time, sliding component 1 24 and sliding component 2 33 will drive the movable clamping block 22 and movable heating block 32 to move in opposite directions, thereby not only releasing the fixation of the first pipe and ending the heating and softening process of the second pipe, but also driving the rotating component 44 to rotate the rotating shaft 43, causing the rotating plate 45 to flip, and the flaring rod 46 and flaring head 47 to align with the end of the second pipe. At the same time, sliding component 1 24 will also drive another movable clamping block 22 to approach the second pipe and, together with another fixed clamping block 23, clamp the second pipe. Once the hydraulic cylinder 1 42 extends its piston rod, the final flaring process of the second pipe can be carried out. During the flaring process of the second pipe, the operator can remove the first pipe and insert a new pipe for end heating and softening, thereby repeating the above operation to achieve continuous plastic pipe flaring.

[0047] The above-mentioned plastic pipe flaring process, by simultaneously heating and softening two pipes and flaring them separately, not only effectively shortens the interval between the plastic pipes, but also saves time in loading and unloading the pipes, thus achieving the effect of efficient flaring processing of plastic pipes.

Claims

1. A flaring and forming device for plastic pipes, characterized in that, The device includes a pipe conveying mechanism (1), a pipe fixing and positioning mechanism (2), a pipe heating mechanism (3), and a pipe flaring mechanism (4) arranged in sequence. The pipe conveying mechanism (1) includes a machine tool (11) and multiple conveying rollers (12) that are parallel and horizontally rotated on the machine tool (11). The pipe fixing and positioning mechanism (2) includes a worktable (21), a pair of movable clamping blocks (22) that are symmetrical to each other and slidably arranged on the worktable (21), a pair of fixed clamping blocks (23) that are symmetrical to each other and fixedly arranged on the worktable (21), and a sliding component (24) that drives the two movable clamping blocks (22) to slide relative to the worktable (21). The two fixed clamping blocks (23) are located between the two movable clamping blocks (22), and the two movable clamping blocks (22) move closer to or away from the two fixed clamping blocks (23) respectively. The pipe heating mechanism (3) includes a pair of fixed heating blocks (31) fixed on the workbench (21) and symmetrical to each other, a movable heating block (32) slidably disposed on the workbench (21) and located between the two fixed heating blocks (31), and a sliding component (33) for driving the movable heating block (32) to slide relative to the workbench (21). A semi-circular heating groove (311) is provided on the side of the fixed heating block (31) close to the movable heating block (32). Semi-circular heating grooves (321) are provided on both sides of the movable heating block (32). When the movable heating block (32) and a fixed heating block (31) are in close contact with each other, the heating groove (321) on one side of the movable heating block (32) can combine with the heating groove (311) on the fixed heating block (31) to form a cylindrical heating chamber. The pipe flaring mechanism (4) includes a second machine tool (41), a first hydraulic cylinder (42) fixed on the second machine tool (41), a rotating shaft (43) rotatably connected to the piston rod end of the first hydraulic cylinder (42) at one end, a rotating assembly (44) driving the rotating shaft (43) to rotate, a rotating plate (45) fixedly connected to the other end of the rotating shaft (43), a flaring rod (46) fixed to one side of the rotating plate (45), and a flaring head (47) fixed to one end of the flaring rod (46) and in the shape of a horn. The worktable (21) is fixed on the second machine tool (41). A connecting hole (431) is provided at the end of the rotating shaft (43) away from the rotating plate (45). A rotating insertion connecting hole (431) is fixedly provided at the piston rod end of the first hydraulic cylinder (42). The connecting column (421) inside 31) has an outer diameter greater than the outer diameter of the piston rod of the hydraulic cylinder (42). The end of the rotating shaft (43) is screwed with a limiting ring (432) that is fitted with the piston rod of the hydraulic cylinder (42). The limiting ring (432) prevents the connecting column (421) from leaving the connecting hole (431). The hydraulic cylinder (42) extends and retracts the piston rod, which can make the rotating plate (45) approach or move away from the fixed heating block (31) or the movable heating block (32) on the worktable (21). The flaring rod (46) and the flaring head (47) are located between the rotating plate (45) and the fixed heating block (31). When the rotating plate (45) approaches the fixed heating block (31), the flaring head (47) can extend into the heating chamber.

2. The flaring and forming device for plastic pipes according to claim 1, characterized in that: Two arc-shaped positioning grooves (121) are opened on the surface of the conveying roller (12) around the conveying roller (12). When the two plastic pipes are placed in the two arc-shaped positioning grooves (121), the ends of the two plastic pipes are coaxial with the heating grooves (311) on one side of the two heating blocks. An arc-shaped positioning groove (231) is opened on the opposite side of the fixed clamping block (23) and the movable clamping block (22). When the wall of the plastic pipe contacts the arc-shaped positioning groove (231), the end of the plastic pipe is coaxial with the heating groove (311).

3. The flaring and forming device for plastic pipes according to claim 1, characterized in that: The machine tool (11) is equipped with a height adjustment assembly (13) on each of its four legs. The height adjustment assembly (13) includes an L-shaped support base (131) fixed to one side of the machine tool (11) leg, a nut (132) fixed to the L-shaped support base (131), a screw (133) that is threaded to the nut (132) and rotates vertically through the L-shaped support base (131), and a circular support plate (134) fixed to the lower end of the screw (133) and in contact with the ground.

4. The flaring and forming device for plastic pipes according to claim 1, characterized in that: The workbench (21) is fixedly provided with two parallel dovetail guide rails (211). The movable clamping block (22) and the fixed clamping block (23) are respectively provided with dovetail grooves (232) that slide on the two dovetail guide rails (211). The top of the fixed clamping block (23) is provided with two threaded holes (233) that connect the two dovetail grooves (232). The threaded holes (233) are threadedly connected with locking screws (234) that lock the fixed clamping block (23) to slide.

5. The flaring and forming device for plastic pipes according to claim 1, characterized in that: The sliding assembly 1 (24) includes a pair of hydraulic cylinders 2 (241) fixed on the machine tool 2 (41), a movable plate (242) fixed to the piston rod ends of the two hydraulic cylinders 2 (241), and a connecting rod 1 (243) fixed to one side of the movable plate (242) and simultaneously fixed to the top of the two movable clamping blocks (22). The hydraulic cylinders 2 (241) are located on one side of the worktable (21), and the piston rods of the hydraulic cylinders 2 (241) extend and retract, which can make the movable plate (242) move closer to or away from the fixed clamping block (23) on the worktable (21). When the movable plate (242) moves, the connecting rod 1 (243) causes one movable clamping block (22) to slide towards one fixed clamping block (23), and the other movable clamping block (22) will slide away from the other fixed clamping block (23).

6. The flaring and forming device for plastic pipes according to claim 5, characterized in that: The top of the movable clamp (22) is fixedly provided with a sliding sleeve (221) through which the connecting rod (243) slides. The top of the sliding sleeve (221) is provided with a threaded hole (222) that communicates with its interior. The threaded hole (222) is threadedly connected with a locking screw (223) that locks the sliding sleeve (221) to slide.

7. The flaring and forming device for plastic pipes according to claim 5, characterized in that: The sliding component 2 (33) includes a connecting rod 2 (331) fixed to one side of the moving plate (242) and a connecting seat (332) fixed to the top of the movable heating block (32) and fixedly connected to one end of the connecting rod 2 (331).

8. The flaring and forming device for plastic pipes according to claim 5, characterized in that: The rotating assembly (44) includes a connecting rod three (441) fixed to one side of the moving plate (242), a U-shaped plate (442) fixed at both ends to the middle of the connecting rod three (441), a plurality of short teeth (443) uniformly fixed to the inner bottom of the U-shaped plate (442), and a plurality of long teeth (444) uniformly fixed to the side wall of the rotating shaft (43) to mesh with the short teeth (443). The rotating shaft (43) passes through the middle of the U-shaped plate (442) and rests on the inner bottom of the U-shaped plate (442). The length of the long teeth (444) is longer than the length of the short teeth (443), and the length of the long teeth (444) is not less than the moving distance of the rotating plate (45).

9. A flaring and forming device for plastic pipes according to claim 8, characterized in that: The machine tool 2 (41) is provided with an L-shaped support base 2 (411), and the connecting rod 3 (441) slides through the L-shaped support base 2 (411). The U-shaped plate (442) is located between the L-shaped support base 2 (411) and the moving plate (242).

10. The flaring and forming device for plastic pipes according to claim 1, characterized in that: The two fixed heating blocks (31) are fixedly connected to two pairs of guide rods (312), and the two pairs of guide rods (312) slide through the movable heating block (32). The two pairs of guide rods (312) are located on the upper and lower sides of the heating groove one (311) or the heating groove two (321), respectively.

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