A pipe bending device

Abstract

The application discloses a pipe bending forming device, comprising a stamping die and a plurality of bending assemblies, the stamping die comprises an upper die and a lower die, the bending assembly is installed on the lower die and cooperates with the upper die through a transmission structure, and the bending assembly is suitable for sequentially bending a plurality of bending points of a product; the bending assembly comprises a mounting seat and a pressing block, the mounting seat is installed on the lower die at intervals and internally places a product to be bent, and the pressing block is elastically and horizontally slidably installed on the lower die and cooperates with the corresponding mounting seat. The application has the beneficial effects that each bending assembly can independently bend a bending point of the product, that is, the product can be bent in batches, the rebound problem caused by one-time bending forming of a traditional hydraulic pipe bender is effectively avoided, and the product quality is greatly improved; in addition, the bending assembly is arranged in the stamping die, the stamping die itself is used to form the pipe bending by using the die closing force, an additional driving source is not needed, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of pipe bending technology, and in particular to a pipe bending forming device. Background Technology

[0002] Pipe bends, as a common type of pipe connector, are typically formed by using a hydraulic pipe bending machine to process straight pipes into the required bend shape, such as... Figure 1 As shown, this bent pipe product has two bends, a and b, and after bending, it requires drilling and punching. Existing hydraulic pipe bending machines typically perform a single bending process, which makes it difficult to precisely control the bending angle and radius, leading to springback after bending and affecting product quality. Therefore, improving existing pipe bending devices to overcome these problems is a pressing issue for those skilled in the art. Utility Model Content

[0003] One of the objectives of this application is to provide a pipe bending forming apparatus.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: a pipe bending forming device, comprising a stamping die and multiple sets of bending components. The stamping die includes an upper die and a lower die. The bending components are installed on the lower die and cooperate with the upper die through a transmission structure. The bending components are suitable for sequentially bending multiple bending points of the product. The bending components include mounting seats and pressure blocks. The mounting seats are installed at intervals on the lower die and contain the product to be bent. The pressure blocks are elastically and horizontally slidably installed on the lower die and cooperate with the corresponding mounting seats. During bending, the upper die moves downward and drives the pressure blocks to move and squeeze the product in the mounting seats through the transmission structure.

[0005] Preferably, the transmission structure includes a transmission block, which is installed at the bottom end of the upper mold. The bottom end of the transmission block and the top end of the pressure block are both provided with a matching inclined surface. When bending, the transmission block is adapted to drive the pressure block to move by the squeezing fit of the inclined surface.

[0006] Preferably, the pressure block is equipped with rollers; when bending, the pressure block is adapted to roll and bend the product using the rollers.

[0007] Preferably, the mounting base is provided with a limiting component, and the limiting component and the pressure block are connected by a transmission component; when bending, the pressure block is adapted to act on the limiting component through the transmission component to lock the product in the vertical direction.

[0008] Preferably, the limiting component includes a limiting plate and a rotating shaft, the limiting plate being horizontally rotatably mounted on the top of the mounting base via the rotating shaft; the transmission component includes a transmission rod, the transmission rod being elastically and vertically slidably mounted within the mounting base, the first end of the transmission rod engaging with the rotating shaft via a guide structure; when locking, the pressure block is adapted to engage with the second end of the transmission rod in a wedge-shaped pressing action to drive the transmission rod upward, thereby the limiting plate being adapted to rotate under the action of the guide structure until it abuts against the top of the product.

[0009] Preferably, the top end of the transmission rod has a cylindrical body and is sleeved on the outside of the rotating shaft. The guiding structure includes a guide block and a guide groove. The guide block is installed on the outside of the rotating shaft, and the guide groove has a spiral structure and is disposed in the cylindrical body. When locking, the cylindrical body moves upward and slides through the guide block and the guide groove to drive the rotating shaft to rotate.

[0010] Preferably, a guide roller is rotatably provided on the side of the pressure block, and the second end of the transmission rod has an inclined surface II. The guide roller and the inclined surface II are in rolling engagement to drive the transmission rod upward.

[0011] Compared with the prior art, the beneficial effects of this application are as follows:

[0012] This invention features multiple bending components, each capable of independently bending a single point on the product. This allows for multi-stage bending, effectively avoiding the springback problem associated with single-bending in traditional hydraulic pipe bending machines, thus significantly improving product quality. Furthermore, by integrating the bending components into a stamping die, the die's own clamping force is used for bending, eliminating the need for an external drive source and reducing production costs. It also solves the cumbersome problem of transferring the bent product to other equipment for further processing in existing technologies, achieving continuous and efficient pipe bending, further enhancing production efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an existing bent pipe structure.

[0014] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 3 This is a top view of the structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the overall structure of the transmission component of this utility model.

[0017] Figure 5 This is a schematic diagram of the limiting plate of this utility model before the product is locked.

[0018] Figure 6 This is a schematic diagram of the limiting plate of this utility model when locking the product.

[0019] Figure 7 This is a schematic diagram of the specific structure of the transmission component and the limiting component of this utility model.

[0020] Figure 8 This is a schematic diagram of the guide structure of this utility model.

[0021] In the diagram: 1. Product; 2. Lower die; 3. Bending assembly; 301. Mounting base; 302. Pressure block; 4. Transmission structure; 401. Transmission block; 5. Inclined surface one; 6. Roller; 7. Limiting assembly; 701. Limiting plate; 702. Rotating shaft; 8. Transmission assembly; 801. Transmission rod; 802. Cylinder; 9. Guide roller; 10. Inclined surface two; 11. Guide structure; 1101. Guide block; 1102. Guide groove. Detailed Implementation

[0022] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0024] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0025] One preferred embodiment of this application, such as Figures 1 to 8As shown, a pipe bending forming device includes a stamping die and multiple sets of bending components 3. The stamping die includes an upper die (not shown) and a lower die 2. The bending components 3 are installed on the lower die 2 and cooperate with the upper die through a transmission structure 4. The bending components 3 can sequentially bend multiple bending points of the product 1. Specifically, the bending components 3 include a mounting base 301 and a pressure block 302. The mounting base 301 is installed at intervals on the lower die 2 and holds the product 1 to be bent inside. The pressure block 302 can be elastically and horizontally slidably installed on the lower die 2 by a spring and cooperates with the corresponding mounting base 301.

[0026] Understandably, when bending product 1, product 1 is placed in the corresponding mounting base 301, and then the stamping die closes, i.e., the upper die moves down and drives the pressure block 302 to move and squeeze product 1 in the mounting base 301 through the transmission structure 4, thereby achieving the bending and forming of product 1. In this process, because multiple bending components 3 are set, and each bending component 3 can independently bend a bending point of product 1, product 1 can be bent in multiple stages. This allows for more precise control of the angle and radius of each bending point, effectively avoiding the springback problem caused by the single bending forming of traditional hydraulic pipe bending machines, and greatly improving the quality of product 1. In addition, by setting the bending component 3 in the stamping die, the forming of the pipe is achieved by using the clamping force of the stamping die itself, without the need for an additional drive source, reducing production costs. Moreover, after stamping, product 1 can immediately undergo subsequent steps such as drilling and punching, solving the cumbersome problem of needing to transfer to other equipment for subsequent processing after bending forming in the existing technology, realizing the continuity and efficiency of pipe bending processing, and further improving production efficiency.

[0027] As a further description of the above embodiments: as Figure 2 As shown, the transmission structure 4 includes a transmission block 401, which is installed at the bottom of the upper die. Both the bottom of the transmission block 401 and the top of the pressure block 302 have matching inclined surfaces 5. Understandably, during stamping and bending, the upper die moves the transmission block 401 downwards, causing the two inclined surfaces 5 to contact each other. The pressing action of the two inclined surfaces 5 drives the pressure block 302 to move, thus bending the product 1. Conversely, when the die opens, the two inclined surfaces 5 move away, and the pressure block 302 moves back to its original position under the spring force, preparing for the bending of the next product 1. This method of driving the pressure block 302 through inclined surface engagement is simple and reliable, ensuring stable and accurate movement of the pressure block 302 during stamping, thereby guaranteeing the quality and precision of the bent product 1.

[0028] Further preferably, rollers 6 can be installed on the pressure block 302, so that during bending, the pressure block 302 can roll and bend the product 1 using the rollers 6. It is understood that, as... Figure 1 As shown in the figure, point b is the secondary bend, located at the end of product 1 with an excessively large bending angle. If the pressure block 302 is used for direct pushing, the enormous sliding friction will hinder the normal flow of product 1 material along the pressure block 302, especially for the outer material. The friction acts like a "hand" pulling it, exacerbating the thinning effect and potentially causing the outer tube wall to crack, affecting the appearance and quality of product 1. However, by installing rollers 6, when the pressure block 302 rolls and bends product 1, the rollers 6 and the surface of product 1 experience rolling friction. Compared to sliding friction, this significantly reduces friction, thereby lowering the risk of damage to the surface of product 1. Furthermore, the low-friction characteristics of the rollers 6 allow the material to flow more freely and naturally, effectively controlling the tube wall thinning rate and reducing the risk of cracking. It should be noted that it is not necessary to install rollers 6 on every pressure block 302. Rather, those skilled in the art can install rollers 6 according to the actual bending angle and position of product 1, thus ensuring the bending effect while controlling the cost of the device.

[0029] Based on the above embodiments, the following problems may exist during use: Figure 2 As shown, product 1 is placed in the placement slot of mounting base 301 before bending, and its horizontal position can be limited. During the bending process, bending is achieved through the squeezing action of transmission block 401. During the downward movement of transmission block 401, there is always a certain gap between the upper and lower dies 2. The upper die can only limit product 1 vertically at the moment of mold closing. Therefore, during mold closing, product 1 may move up and down vertically due to the squeezing action of pressure block 302, thus affecting the bending accuracy and the quality of product 1.

[0030] Therefore, in order to solve the above-mentioned technical problems, such as Figure 4 As shown, a limiting component 7 is provided on the mounting base 301, and the limiting component 7 and the pressure block 302 are connected by a transmission component 8. It can be understood that when bending, the pressure block 302 can act on the limiting component 7 through the transmission component 8 to lock the product 1 in the vertical direction.

[0031] Specifically, such as Figures 6 to 8As shown, the limiting assembly 7 includes a limiting plate 701 and a rotating shaft 702. The limiting plate 701 is horizontally mounted on the top of the mounting base 301 via the rotating shaft 702. The transmission assembly 8 includes a transmission rod 801, which has an "L"-shaped structure and is vertically slidably mounted in the mounting base 301 via a spring. The first end (i.e., the vertical end) of the transmission rod 801 cooperates with the rotating shaft 702 through a guide structure 11. Specifically, the vertical end of the transmission rod 801 has a cylindrical body 802, which is sleeved on the outside of the rotating shaft 702. The guide structure 11 includes a guide block 1101 and a guide groove 1102. The guide block 1101 is mounted on the outside of the rotating shaft 702, and the guide groove 1102 has a spiral structure and is located inside the cylindrical body 802. The second end (i.e., the horizontal end) of the transmission rod 801 cooperates with the pressure block 302.

[0032] Understandably, when the pressure block 302 initially moves, that is, before the pressure block 302 has squeezed and bent the product 1, the pressure block 302 will drive the transmission rod 801 upward through wedge-shaped compression. The guide groove 1102 acts on the guide block 1101, so that the limiting plate 701 rotates until it abuts against the top of the product 1, thereby locking the product 1 in the vertical direction. Figure 4 and Figure 6 As shown, this further improves the quality of product 1 during bending. Similarly, conversely, during mold opening, as the upper mold moves upward, the inclined surface fit between the transmission block 401 and the pressure block 302 gradually separates. The pressure block 302 resets under the action of the spring force and separates from the transmission rod 801. At this time, the transmission rod 801 moves downward under the action of the spring force, and the guide block 1101 slides in the guide groove 1102, driving the rotating shaft 702 to rotate in the opposite direction, thereby causing the limiting plate 701 to leave the top of product 1, releasing the lock on product 1, as shown. Figure 5 As shown.

[0033] Further optimization, such as Figure 6 and Figure 7 As shown, a guide roller 9 is rotatably mounted on the side of the pressure block 302, and the second end of the transmission rod 801 has an inclined surface 10. When the two are engaged, the guide roller 9 moves horizontally and squeezes the inclined surface 10. The rolling engagement (i.e., wedge-shaped extrusion engagement) between the guide roller 9 and the inclined surface 10 can convert the horizontal movement of the pressure block 302 into a vertical driving force on the transmission rod 801. Compared with the traditional rigid inclined surface engagement (such as the engagement between the transmission block 401 and the pressure block 302 mentioned above), this rolling extrusion method significantly reduces the wear between the mating surfaces and extends the service life.

[0034] It should be noted that in this application, the vertical locking of product 1 is still driven by the clamping force, and the unlocking is achieved by the spring force. This design eliminates the need for an additional power source to drive the locking and unlocking actions of the limit component 7, which simplifies the device structure and reduces energy consumption and cost.

[0035] The working principle of this utility model is as follows (this application describes the product 1 as requiring two bends; in actual application, the number of bending components 3 can be adjusted according to the specific bending requirements of product 1):

[0036] Before starting work, such as Figure 2 As shown, the product 1 to be bent can be placed manually or by a robot into the corresponding placement slot of the left mounting base 301, and then the mold is closed. At this time, the upper mold will drive the transmission block 401 to move down and contact the pressure block 302. Under the squeezing and cooperation of the two inclined surfaces 5, the pressure block 302 will be driven to move. When the pressure block 302 initially moves, the guide roller 9 will move horizontally and squeeze the inclined surface 10 on the transmission rod 801, thereby causing the transmission rod 801 to move up. At this time, the guide groove 1102 and the guide block 1101 cooperate to make the limiting plate 701 rotate until it abuts against the top of the product 1, so as to lock the product 1 in the vertical direction. Then the pressure block 302 continues to move, and then cooperates with the mounting base 301 to achieve the initial bending of the product 1 (i.e., bending at point a).

[0037] After the stamping die opens, the pressure block 302 and the transmission rod 801 return to their original positions under the action of elastic force. At this time, the product 1, which has been bent once, is placed in the right mounting seat 301, and then the product 1 to be bent is placed in the left mounting seat 301. By repeating the above steps, the product 1 at point b can be bent. Finally, the fully bent product 1 can be removed and placed in the next station of the stamping die for subsequent processes such as punching or cutting.

[0038] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A pipe bending forming device, characterized in that, include: A stamping die, the stamping die comprising an upper die and a lower die; as well as Multiple bending components are installed on the lower die and cooperate with the upper die through a transmission structure. The bending components are suitable for sequentially bending multiple bending points of the product. The bending assembly includes a mounting base and a pressure block. The mounting base is spaced apart from the lower die and contains the product to be bent. The pressure block is elastically and horizontally slidably mounted on the lower die and cooperates with the corresponding mounting base. During bending, the upper die moves downward and drives the pressure block to move and squeeze the product in the mounting base through the transmission structure.

2. The pipe bending forming device as described in claim 1, characterized in that: The transmission structure includes a transmission block, which is installed at the bottom end of the upper mold. The bottom end of the transmission block and the top end of the pressure block are both provided with a matching inclined surface. When bending, the transmission block is adapted to drive the pressure block to move by the squeezing fit of the inclined surface.

3. The pipe bending forming device as described in claim 2, characterized in that: The pressure block is equipped with rollers; when bending, the pressure block is adapted to roll and bend the product by the rollers.

4. The pipe bending forming apparatus according to any one of claims 1-3, characterized in that: The mounting base is provided with a limiting component, and the limiting component and the pressure block are connected by a transmission component; when bending, the pressure block is adapted to act on the limiting component through the transmission component to lock the product in the vertical direction.

5. The pipe bending forming device as described in claim 4, characterized in that: The limiting component includes a limiting plate and a rotating shaft. The limiting plate is horizontally rotatably mounted on the top of the mounting base via the rotating shaft. The transmission component includes a transmission rod, which is elastically and vertically slidably mounted in the mounting base. The first end of the transmission rod cooperates with the rotating shaft through a guide structure. When locking, the pressure block is adapted to engage with the second end of the transmission rod in a wedge-shaped pressing action to drive the transmission rod upward, and the limiting plate is adapted to rotate under the action of the guide structure until it abuts against the top of the product.

6. The pipe bending forming apparatus as described in claim 5, characterized in that: The transmission rod has a cylindrical body at its top end and is sleeved on the outside of the rotating shaft. The guide structure includes a guide block and a guide groove. The guide block is installed on the outside of the rotating shaft, and the guide groove has a spiral structure and is disposed in the cylindrical body. When locking, the cylinder moves upward and slides through the guide block and the guide groove to drive the rotating shaft to rotate.

7. The pipe bending forming apparatus as described in claim 6, characterized in that: The side of the pressure block is rotatably equipped with a guide roller, and the second end of the transmission rod has an inclined surface. The guide roller and the inclined surface cooperate in a rolling manner to drive the transmission rod upward.

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