A bend core pulling device
By designing a pipe bending core-pulling device that supports the positioning module and the core-pulling module, the problem of damage to the threads caused by traditional pipe bending core-pulling technology is solved, and efficient and low-cost pipe bending processing is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN BAI BANGYUAN IND CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-06-26
Smart Images
Figure CN224408180U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe bending and core pulling technology, specifically a pipe bending and core pulling device. Background Technology
[0002] In the field of pipe bending, the mandrel insertion technique is a key process to prevent thin-walled or small-bending-radius pipes from collapsing, wrinkling, or excessively deforming during bending. This technique provides support by inserting a mandrel (mandrel) into the pipe before bending, thereby ensuring the shape accuracy, inner wall smoothness, and wall thickness uniformity of the bent pipe.
[0003] However, when pipe bending products have precision threaded structures inside, traditional pipe bending core-pulling technology faces significant challenges: conventional rigid mandrels are prone to severe friction or even hard scraping with the internal threads of the pipe wall during the core-pulling process, leading to serious damage or deformation of the precision threads and failing to meet product functional requirements. Furthermore, the frequent replacement of dedicated mandrels to adapt to different thread specifications not only increases processing costs and time, but the complex mandrel drive mechanism also occupies excessive space, reducing production flexibility and efficiency. Therefore, there is an urgent need to develop a new pipe bending core-pulling solution that can effectively support the pipe wall, ensure bending quality, perfectly protect the internal threads, simplify operation, and has a compact and stable structure. Utility Model Content
[0004] The purpose of this invention is to provide a pipe bending core pulling device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a pipe bending core pulling device, comprising a fixed mold, a support mold fixedly connected to the upper side of the fixed mold, and a plurality of pins for connecting the two, wherein the inner side of the support mold is further provided with a support positioning module and a core pulling module;
[0006] The support and positioning module includes a lifting mold, positioning slots, guide pins, and guide grooves. The support and positioning module is used to support and assist in bending the core-pulling tube. The lifting mold is slidably connected inside the support mold. The lifting mold has multiple positioning slots for positioning the product inside. The positioning slots are evenly distributed inside the lifting mold. Each positioning slot is set with an arc surface structure and has a groove inside that is adapted to the product. Multiple guide pins are fixedly connected inside the fixed mold. Each guide pin is set with a square columnar structure and has an inclined guide groove inside. The guide pins all pass through the support mold and are slidably connected inside the lifting mold.
[0007] Preferably, the lifting mold has multiple sliding openings in the middle, and multiple guide columns for lifting the lifting mold are fixedly connected inside the sliding openings.
[0008] Preferably, the guide groove is provided on both sides of the guide pin.
[0009] Preferably, the core-pulling module includes multiple guide seats, clamping blocks, connecting blocks, slide grooves, sliding grooves, core-pulling tubes, mold tables, mold cores, locking grooves, and driven blocks. The core-pulling module is used for bending and pulling the core of the core-pulling tube. The guide seats are all fixedly connected inside the lifting mold. The guide seats are all located on one side of adjacent positioning grooves. Each guide seat has a slide groove inside. Each guide seat has a connecting block fixedly connected to its lower end. The connecting block is fixedly connected to the lifting mold. Each slide groove has a clamping block slidably connected inside. Each guide seat has a sliding groove inside. Each positioning groove has a core-pulling tube fixedly connected inside. Each sliding groove has a mold table slidably connected inside. Each mold table has a mold core fixedly connected to its upper side. Each mold core is slidably connected inside the core-pulling tube. Each mold table has a locking groove on one side. Each mold table has a driven block fixedly connected to one side. Each driven block is slidably connected inside adjacent guide grooves.
[0010] Preferably, each of the clamping blocks has a beveled opening at its lower end, and the beveled opening abuts against a nearby locking groove.
[0011] Preferably, both the mold platform and the mold core are set to the curvature of the core-pulling tube.
[0012] Preferably, the driven block has the same diameter as the guide groove.
[0013] Compared with the prior art, the present invention provides a pipe bending core pulling device, which has the following beneficial effects:
[0014] 1. This device enables the mold core to deform and pull the core tube through the cooperation of the guide groove and the driven block. The device has a simple structure and a smooth running trajectory. While reducing costs, it also reduces damage to the internal threads of the core tube, thus improving its practicality.
[0015] 2. The device has a compact structure and uses simple linkage to enable multiple core-pulling tubes to pull cores simultaneously, thereby improving space utilization. Attached Figure Description
[0016] 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.
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the lifting mold in this utility model;
[0019] Figure 3 This is a schematic diagram of the guide pin structure in this utility model;
[0020] Figure 4 This is a schematic diagram of the guide seat in this utility model;
[0021] Figure 5 This is a schematic diagram of the structure of the mold platform in this utility model.
[0022] In the diagram: 1. Fixed mold; 2. Support mold; 3. Pin; 4. Lifting mold; 5. Positioning groove; 6. Guide pin; 7. Guide groove; 8. Guide seat; 9. Slide groove; 10. Connecting block; 11. Extrusion block; 12. Slide groove; 13. Core pulling tube; 14. Mold table; 15. Mold core; 16. Locking groove; 17. Driven block. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0025] Example 1:
[0026] Please see Figure 1-5 This utility model provides a technical solution: a pipe bending core pulling device, including a fixed mold 1, a support mold 2 fixedly connected to the upper side of the fixed mold 1, and a plurality of pins 3 for connecting the two. The support mold 2 is also provided with a support positioning module inside.
[0027] The support and positioning module includes a lifting mold 4, a positioning groove 5, a guide pin 6, and a guide groove 7. The support and positioning module is used to support and assist in bending the core-pulling tube 13. The lifting mold 4 is slidably connected inside the support mold 2. Multiple positioning grooves 5 for positioning products are opened inside the lifting mold 4. The positioning grooves 5 are evenly distributed inside the lifting mold 4. The positioning grooves 5 are all set with an arc surface structure and have slots that are adapted to the product. Multiple guide pins 6 are fixedly connected inside the fixed mold 1. The guide pins 6 are all set with a square columnar structure. The guide pins 6 have inclined guide grooves 7 inside. The guide pins 6 all pass through the support mold 2 and are slidably connected inside the lifting mold 4.
[0028] Furthermore, the lifting mold 4 has multiple sliding openings in the middle, and multiple guide columns for lifting the lifting mold 4 are fixedly connected inside the sliding openings. The guide columns can be raised and lowered by conventional hydraulic control methods in order to control the lifting mold 4 to rise and fall.
[0029] Furthermore, the guide groove 7 is connected to both sides of the guide pin 6.
[0030] Example 2:
[0031] Please see Figure 1-5 Furthermore, in conjunction with Embodiment 1, the core-pulling module includes multiple guide seats 8, clamping blocks 11, connecting blocks 10, sliding grooves 9, sliding grooves 12, core-pulling tubes 13, mold tables 14, mold cores 15, locking grooves 16, and driven blocks 17. The core-pulling module is used for bending and pulling the core of the core-pulling tube 13. The guide seats 8 are all fixedly connected inside the lifting mold 4. The guide seats 8 are all located on one side of the adjacent positioning grooves 5. The guide seats 8 are all provided with sliding grooves 9 inside. The lower end of each guide seat 8 is fixedly connected to a connecting block 10. The connecting blocks 10 are all fixedly connected to the lifting mold 4. The sliding grooves 9 are all provided with sliding grooves 9. The device has a sliding connection with a clamping block 11, and each guide seat 8 has a sliding groove 12. Each positioning groove 5 has a core-pulling tube 13 fixedly connected inside. Each sliding groove 12 has a mold table 14 slidably connected inside. Each mold table 14 has a mold core 15 fixedly connected to its upper side. Each mold core 15 is slidably connected inside the core-pulling tube 13. Each mold table 14 has a locking groove 16 on one side. Each mold table 14 has a driven block 17 fixedly connected to one side. Each driven block 17 is slidably connected inside the adjacent guide groove 7. The device has a compact and simple structure, which makes the space utilization of the device high and reduces the cost of the device.
[0032] Furthermore, each of the clamping blocks 11 has a beveled opening at its lower end, and the beveled opening abuts against the adjacent locking groove 16.
[0033] Furthermore, both the mold platform 14 and the mold core 15 are set to the same curvature as the core-pulling tube 13.
[0034] Furthermore, the driven block 17 is configured with the same diameter as the guide groove.
[0035] In actual operation, when this device is used, the user places the core-pulling tube 13 inside the guide groove 7, and then inserts the clamping block 11 into the slide groove 9 to provide a stable limit for the mold table 14. At this time, the core-pulling tube 13 is in contact with the outer wall of the mold core 15. Then the user pulls out the clamping block 11. During the bending process, the user provides hydraulic lifting force to the guide column structure to drive the lifting mold 4 to descend. During the descent of the lifting mold 4, the guide pin 6 is fixed in position, and the guide seat 8 drives the mold table 14 to move, so that the mold core 15 protrudes from the guide seat 8. At the same time, the core-pulling tube 13 is placed inside the positioning groove 5. With the insertion and extrusion of the mold core 15, the core-pulling tube 13 is bent according to the predetermined arc. At this time, the user can raise the lifting mold 4. As the guide seat 8 gradually moves away from the guide groove 7, the mold table 14 is dragged by the guide groove 7 to the bottom of the guide seat 8, so that the mold core 15 is separated from the core-pulling tube 13, completing the bending and core-pulling work.
[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A pipe bending core pulling device, comprising a fixed mold (1), a support mold (2) fixedly connected to the upper side of the fixed mold (1), and a plurality of pins (3) for connecting the two, characterized in that: The inner side of the support mold (2) is also provided with a support positioning module and a core pulling module; The support positioning module includes a lifting mold (4), a positioning groove (5), a guide pin (6), and a guide groove (7). The support positioning module is used to support and assist in bending the core tube (13). The lifting mold (4) is slidably connected inside the support mold (2). The lifting mold (4) has multiple positioning grooves (5) for positioning the product. The positioning grooves (5) are evenly distributed inside the lifting mold (4). The positioning grooves (5) are all set as arc surface structures and have slots that are adapted to the product. The fixed mold (1) has multiple guide pins (6) fixedly connected inside. The guide pins (6) are all set as square columnar structures. The guide pins (6) have inclined guide grooves (7) inside. The guide pins (6) all penetrate the support mold (2) and are slidably connected inside the lifting mold (4).
2. The pipe bending core pulling device according to claim 1, characterized in that: The lifting mold (4) has multiple sliding openings in the middle, and multiple guide columns for lifting the lifting mold (4) are fixedly connected inside the sliding openings.
3. The pipe bending core pulling device according to claim 1, characterized in that: The guide groove (7) is provided on both sides of the guide pin (6).
4. The pipe bending core pulling device according to claim 1, characterized in that: The core-pulling module includes multiple guide seats (8), clamping blocks (11), connecting blocks (10), slide grooves (9), sliding grooves (12), core-pulling tubes (13), mold tables (14), mold cores (15), locking grooves (16), and driven blocks (17). The core-pulling module is used to bend and pull the core of the core-pulling tube (13). The guide seats (8) are all fixedly connected inside the lifting mold (4). The guide seats (8) are all set on one side of the adjacent positioning grooves (5). The guide seats (8) are all provided with slide grooves (9) inside. The lower end of the guide seats (8) is fixedly connected to the connecting blocks (10). The connecting blocks (10) are all fixedly connected to the lifting mold (4). Next, each of the slide grooves (9) is slidably connected to a clamping block (11), each of the guide seats (8) is provided with a sliding groove (12), each of the positioning grooves (5) is fixedly connected to a core-pulling tube (13), each of the sliding grooves (12) is slidably connected to a mold platform (14), each of the mold platforms (14) is fixedly connected to a mold core (15) on the upper side, each of the mold cores (15) is slidably connected to the core-pulling tube (13), each of the mold platforms (14) is provided with a locking groove (16) on one side, each of the mold platforms (14) is fixedly connected to a driven block (17) on one side, and each of the driven blocks (17) is slidably connected to the adjacent guide grooves (7).
5. The pipe bending core pulling device according to claim 4, characterized in that: Each of the clamping blocks (11) has a slanted opening at its lower end, and the slanted opening abuts against the adjacent locking groove (16).
6. The pipe bending core pulling device according to claim 4, characterized in that: Both the mold platform (14) and the mold core (15) are set with the same curvature as the core-pulling tube (13).
7. The pipe bending core pulling device according to claim 4, characterized in that: The driven block (17) has the same diameter as the guide groove.