A metal pipe forming die

Abstract

The utility model discloses a metal pipe fitting forming die, including base, the inside of base is provided with clamping mechanism, and the side of clamping mechanism is provided with mould. Through above -mentioned structure, use this device, and after getting the bent pipe through the multiple bending of metal raw pipe to the bending machine of arbitrary style structure, can directly put into the hydraulic pipe expanding mould matched with the bent pipe, and the both ends of bent pipe butt -joint with hydraulic pipe expanding machine pressure pipe, and once forming multiple semi -finished products after pipe expansion, and the production efficiency is greatly promoted, and only need to cut off the reserved excess part to obtain multiple finished products, and the process is not only suitable for the pipe fitting with bending, but also can be applied to straight pipe fitting, through clamping mechanism, worm gear and worm wheel and bidirectional screw rod synergies, make the connecting plate drive mould stable clamping, can prevent bidirectional screw rod from reverse rotation under the pipe expansion pressure effect, avoid the loose deviation of mould, guarantee the mould cavity alignment accuracy.

Description

Technical Field

[0001] This utility model relates to the field of metal pipe forming and processing technology, and in particular to a metal pipe forming mold. Background Technology

[0002] Metal pipe fittings are widely used in key fields such as construction, automobiles, aerospace, and water conservancy projects. Their dimensional accuracy and structural stability directly determine the safety performance and effectiveness of the end products.

[0003] In traditional pipe bending forming processes, bent pipes need to be expanded individually, processing only one pipe at a time, resulting in low production efficiency. Furthermore, the pipe positioning is prone to misalignment during expansion, leading to insufficient dimensional accuracy after forming. Some forming equipment is only suitable for straight pipes or specific types of bent pipes, limiting its application range. Different equipment or molds are needed to meet diverse processing requirements, increasing production costs and operational complexity. Most existing metal pipe forming molds rely on a single threaded rod or cylinder drive for clamping, lacking self-locking functionality. Under expansion pressure, these molds are prone to loosening, causing misalignment of the mold cavity and affecting pipe forming quality. While some clamping mechanisms can achieve stable clamping, their complex transmission structures and cumbersome operation make them unsuitable for high-efficiency mass production processes, hindering overall processing efficiency improvements. Utility Model Content

[0004] The purpose of this utility model is to provide a metal pipe forming mold that can be adapted to the batch forming process of bent pipes and straight pipes, and can achieve efficient mass production and stable clamping.

[0005] To achieve the above objectives, a metal pipe forming mold is provided, including a base, a clamping mechanism is provided inside the base, and a mold is provided on the side of the clamping mechanism;

[0006] The clamping mechanism includes a first cover plate, the bottom of which is fixedly connected to a base. A motor is fixedly connected to the side of the base, and a worm gear is fixedly connected to the output end of the motor. A worm wheel is threadedly connected to the middle of the worm gear, and a bidirectional threaded rod is fixedly connected to the middle of the worm wheel. A sliding block is threadedly connected to one end of the bidirectional threaded rod, and a connecting plate is fixedly connected to the side of the sliding block. One end of the connecting plate is inserted into a mold, and an expansion groove is provided inside the mold. One end of the bidirectional threaded rod is fixedly and rotatably connected to a second cover plate, and a protective shell is fixedly connected to the side of the second cover plate. A limit rod is fixedly connected inside the protective shell.

[0007] According to the aforementioned metal pipe forming mold, one end of the worm gear passes through and is rotatably connected to the base, while the other end of the worm gear is rotatably connected to the interior of the base, ensuring that the overall structure does not shift during the metal pipe forming process and guaranteeing forming accuracy.

[0008] According to the metal pipe forming mold, one end of the bidirectional threaded rod is rotatably connected to the inside of the base.

[0009] According to the metal pipe forming mold, the bottom of the protective shell is fixedly connected to the top of the first cover plate to form the upper support frame of the clamping mechanism.

[0010] According to the aforementioned metal pipe forming mold, one end of the limiting rod is fixedly connected to the top of the first cover plate. There are two limiting rods, respectively distributed on both sides of the bidirectional threaded rod. The limiting rods pass through and are slidably connected to the sliding block, restricting the movement direction of the sliding block and ensuring that the sliding block only moves along the axial direction of the bidirectional threaded rod, thus preventing the sliding block from rotating synchronously with the bidirectional threaded rod. At the same time, the stability of the sliding block's movement is improved by the support on both sides, preventing the sliding block from tilting during the force process and ensuring the clamping accuracy of the mold.

[0011] According to the metal pipe forming mold, there are two sliding blocks, which are symmetrically distributed about the center plane of the bidirectional threaded rod. The two sliding blocks can move synchronously towards or away from each other under the thread drive, ensuring that the mold always maintains the correct cavity alignment and ensuring the dimensional accuracy of the metal pipe forming.

[0012] According to the aforementioned metal pipe forming mold, one side of the connecting plate is inserted into the mold, and two bolts are provided on the side of the mold.

[0013] According to the aforementioned metal pipe forming mold, the mold has five identical expansion grooves inside, and a cutting groove is provided in the middle of the expansion groove. A finished part can be formed between every two adjacent cutting grooves, and an independent forming area is formed between every two adjacent cutting grooves. Multiple finished parts can be produced simultaneously, improving production efficiency. The cutting groove can also provide a positioning reference for subsequent cutting processes, ensuring the cutting accuracy and dimensional consistency of the finished parts.

[0014] This utility model has the following beneficial effects:

[0015] 1. Compared with existing technologies, after the metal tube is bent multiple times by a bending machine of any type and structure to obtain a bent tube, it can be directly placed into a hydraulic tube expansion mold that matches the bent tube. The mold is mounted on the hydraulic tube expansion machine and the two ends of the bent tube are connected to the pressure pipe of the hydraulic tube expansion machine. After expansion, the shape of the tube fits perfectly with the inner cavity surface of the mold, and multiple semi-finished products are formed at one time, which greatly improves production efficiency. Afterwards, only the reserved excess part needs to be removed to obtain multiple finished products. Moreover, this process is not only suitable for bent tubes, but also for straight tubes, which broadens the application range of the equipment and reduces the cost of diversified processing.

[0016] 2. Compared with existing technologies, the motor-driven worm gear rotates the worm wheel, which in turn causes the bidirectional threaded rod to rotate synchronously. This drives two symmetrically distributed sliding blocks to move towards each other, and through the connecting plate, it drives the mold to be stably clamped. At the same time, the combination structure of the worm gear and worm wheel has a natural self-locking characteristic, which can prevent the bidirectional threaded rod from rotating in the opposite direction under the pressure of tube expansion, avoiding mold loosening and displacement. Combined with the symmetrical clamping force driven by the bidirectional threaded rod and the guiding effect of the limiting rod, it further ensures the alignment accuracy of the mold cavity and ensures the stable quality of pipe forming. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a three-dimensional overall structural diagram of a metal pipe forming mold according to the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of a metal pipe forming mold according to the present invention;

[0020] Figure 3 This utility model relates to a metal pipe forming mold. Figure 2 Enlarged view of the structure at point A in the middle;

[0021] Figure 4 This utility model relates to a metal pipe forming mold. Figure 2 Enlarged view of the structure at point B in the middle.

[0022] Legend:

[0023] 1. Base; 2. Clamping mechanism; 3. Mold; 21. First cover plate; 22. Motor; 23. Worm gear; 24. Worm wheel; 25. Bidirectional threaded rod; 26. Sliding block; 27. Connecting plate; 28. Protective shell; 29. ​​Second cover plate; 210. Limiting rod; 31. Expansion groove. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] Reference Figure 1-4 This utility model discloses a metal pipe forming mold, which includes a base 1, a clamping mechanism 2 inside the base 1, a mold 3 on the side of the clamping mechanism 2, and five identical expansion grooves 31 inside the mold 3. A cutting groove is provided in the middle of the expansion groove 31. A finished part can be formed between every two adjacent cutting grooves, and an independent forming area is formed between every two adjacent cutting grooves. Multiple finished parts can be produced simultaneously, improving production efficiency. The cutting groove can also provide a positioning reference for subsequent cutting processes, ensuring the cutting accuracy and dimensional consistency of the finished parts.

[0026] The clamping mechanism 2 includes a first cover plate 21, the bottom of which is fixedly connected to a base 1. A motor 22 is fixedly connected to the side of the base 1, and a worm gear 23 is fixedly connected to the output end of the motor 22. One end of the worm gear 23 passes through and is rotatably connected to the base 1, while the other end is rotatably connected to the interior of the base 1. This ensures that the overall structure does not shift during the metal pipe forming process, guaranteeing forming accuracy. A worm wheel 24 is threadedly connected to the middle of the worm gear 23, and a bidirectional threaded rod 25 is fixedly connected to the middle of the worm wheel 24. One end of the bidirectional threaded rod 25 is rotatably connected to the interior of the base 1, and a sliding block 26 is threadedly connected to one end of the bidirectional threaded rod 25. There are two sliding blocks 26, symmetrically distributed about the center plane of the bidirectional threaded rod 25. The two sliding blocks 26 can move synchronously towards or away from each other under the threaded drive, ensuring that the mold 3 always maintains the correct cavity alignment and guaranteeing the forming dimensional accuracy of the metal pipe. A connecting plate 27 is fixedly connected to the side of the sliding block 26, and one side of the connecting plate 27 is inserted into... The mold 3 has two bolts on its side. One end of the connecting plate 27 is inserted into the mold 3. The mold 3 has an expansion groove 31 inside. One end of the bidirectional threaded rod 25 is fixedly and rotatably connected to the second cover plate 29. The side of the second cover plate 29 is fixedly connected to the protective shell 28. The bottom of the protective shell 28 is fixedly connected to the top of the first cover plate 21, forming the upper support frame of the clamping mechanism 2. The inside of the protective shell 28 is fixedly connected to the limiting rod 210. One end of the limiting rod 210 is fixedly connected to the top of the first cover plate 21. There are two limiting rods 210, which are distributed on both sides of the bidirectional threaded rod 25. The limiting rods 210 pass through and are slidably connected to the sliding block 26, restricting the movement direction of the sliding block 26 and ensuring that the sliding block 26 only moves along the axial direction of the bidirectional threaded rod 25, avoiding the sliding block 26 from rotating synchronously with the bidirectional threaded rod 25. At the same time, the stability of the movement of the sliding block 26 is improved by the support on both sides, preventing the sliding block 26 from tilting during the force process and ensuring the clamping accuracy of the mold 3.

[0027] Working principle: For processing bent pipe fittings, the original metal pipe is bent multiple times using any type of bending machine to obtain a bent pipe that fits the inner cavity of mold 3. For processing straight pipe fittings, a straight metal pipe of the appropriate size is directly used for later use. Mold 3 is fixed to sliding block 26 via connecting plate 27 and reinforced with bolts on the side of mold 3. Motor 22 is started, driving worm 23 to rotate. Worm 23 drives meshing worm wheel 24 to rotate, which in turn drives bidirectional threaded rod 25 to rotate synchronously. Bidirectional threaded rod 25 drives two symmetrical sliding blocks 26 to move towards each other along limit rod 210 via reverse threads. The connecting plate 27 drives mold 3 to close stably and clamp. At this time, the self-locking structure of worm wheel 24 and worm 23 ensures bidirectional... The threaded rod 25 does not rotate in the opposite direction, keeping the clamping state of the mold 3 stable; the pre-treated pipe is placed into the expansion groove 31 of the mold 3, and the mold 3 is installed as a whole into the hydraulic tube expander, so that the two ends of the pipe are connected to the pressure pipe of the hydraulic tube expander; the hydraulic tube expander is started, and the pressure medium is injected into the inside of the pipe. The pipe expands under pressure until the shape is completely in contact with the inner cavity surface of the mold 3, forming multiple semi-finished products in five expansion grooves 31 at one time; after the tube expansion is completed, the hydraulic tube expander is turned off, and the motor 22 is controlled to reverse, so that the sliding block 26 moves in opposite directions to open the mold 3 and remove the formed semi-finished pipe; according to the positioning of the knife groove in the mold 3, the reserved excess part on the pipe is cut off to obtain multiple finished pipes with consistent dimensional accuracy.

[0028] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A metal pipe forming mold, characterized in that, Includes a base (1), the base (1) is provided with a clamping mechanism (2) inside, and a mold (3) is provided on the side of the clamping mechanism (2); The clamping mechanism (2) includes a first cover plate (21), the bottom of which is fixedly connected to a base (1). A motor (22) is fixedly connected to the side of the base (1). A worm gear (23) is fixedly connected to the output end of the motor (22). A worm wheel (24) is threadedly connected to the middle of the worm gear (23). A bidirectional threaded rod (25) is fixedly connected to the middle of the worm wheel (24). A sliding block (26) is threadedly connected to one end of the bidirectional threaded rod (25). A connecting plate (27) is fixedly connected to the side of the sliding block (26). One end of the connecting plate (27) is inserted into a mold (3). An expansion groove (31) is provided inside the mold (3). One end of the bidirectional threaded rod (25) is fixedly rotatably connected to a second cover plate (29). A protective shell (28) is fixedly connected to the side of the second cover plate (29). A limit rod (210) is fixedly connected inside the protective shell (28).

2. The metal pipe forming mold according to claim 1, characterized in that, One end of the worm (23) passes through and is rotatably connected to the base (1), and the other end of the worm (23) is rotatably connected to the inside of the base (1).

3. The metal pipe forming mold according to claim 1, characterized in that, One end of the bidirectional threaded rod (25) is rotatably connected to the inside of the base (1).

4. The metal pipe forming mold according to claim 1, characterized in that, The bottom of the protective shell (28) is fixedly connected to the top of the first cover plate (21).

5. A metal pipe forming mold according to claim 1, characterized in that, One end of the limiting rod (210) is fixedly connected to the top of the first cover plate (21). There are two limiting rods (210), which are distributed on both sides of the bidirectional threaded rod (25). The limiting rods (210) are both slidably connected to the sliding block (26).

6. The metal pipe forming mold according to claim 1, characterized in that, There are two sliding blocks (26), which are symmetrically distributed about the center plane of the bidirectional threaded rod (25).

7. A metal pipe forming mold according to claim 1, characterized in that, One side of the connecting plate (27) is inserted into the mold (3), and two bolts are provided on the side of the mold (3).

8. A metal pipe forming mold according to claim 1, characterized in that, The mold (3) has five identical expansion grooves (31) inside, and a cutting groove is provided in the middle of the expansion groove (31). A finished part can be formed between every two adjacent cutting grooves.

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