Bent pipe forming mechanism

Abstract

The utility model discloses a bent pipe forming mechanism which comprises a forming die and a material pushing mechanism, the material pushing mechanism and the forming die are oppositely arranged, and a material pushing end of the material pushing mechanism directly faces a forming cavity of the forming die and is used for driving a hollow pipe to be bent to enter the forming cavity. The material pushing mechanism comprises a material pushing driver and a material pushing pipe fitting; a pipe bending core is movably arranged in the forming cavity and comprises a linear section and a bent section; the material pushing pipe fitting can drive a pipe to be bent to be sleeved into the pipe bending core and move along the path of the linear section and the bent section of the pipe bending core, so that one-by-one bending forming of the pipe is achieved. According to the pipe bending machine, automatic and continuous pushing, one-by-one forming and automatic discharging of pipes can be achieved, continuous pipe bending operation is completed, and therefore production efficiency is remarkably improved.

Description

Technical Field

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

[0002] Pipe bending is a common process in pipe processing, widely used in the automotive, aerospace, furniture, and piping engineering industries. For bending small-diameter, thin-walled pipes, methods such as stamping bending or loop bending are typically used.

[0003] In the existing pipe bending process, after each pipe is bent, it is usually necessary to manually or robotically remove the formed pipe from the mold before placing the next straight pipe into the mold cavity for the next bending operation. This intermittent production method cannot achieve automatic continuous feeding and individual forming of pipes, resulting in low production efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a pipe bending forming mechanism.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pipe bending forming mechanism, including a forming mold and a pushing mechanism, wherein the pushing mechanism is arranged opposite to the forming mold and the pushing end of the pushing mechanism is directly facing the forming cavity of the forming mold, for driving the hollow pipe to be bent into the forming cavity; the pushing mechanism includes a pushing driver and a pushing pipe fitting; a pipe bending core is movably arranged in the forming cavity, the pipe bending core including a straight section and a curved section; the pushing pipe fitting can drive the pipe to be bent to fit into the pipe bending core and move along the path of its straight section and curved section, so as to realize the pipe bending forming one by one.

[0006] By adopting the above technical solution, a bent mandrel with straight and curved sections is set up, and a pre-bent tube is pre-fitted onto the curved section of the mandrel. The outer wall of the curved tube fits into the inner wall of the forming cavity, allowing the entire bent mandrel to be suspended within the forming cavity. Since the straight section of the mandrel guides the tube to be bent, and the curved section is fitted with the pre-formed tube, the two work together to precisely suspend and position the bent mandrel in the radial direction. Simultaneously, the fitting relationship between the straight section and the tube restricts the circumferential rotation of the mandrel, while the axial constraint of the curved tube on the curved section (e.g., geometric limits of the bending path) restricts the axial movement of the mandrel. Therefore, the bent mandrel maintains a stable position and posture throughout the continuous pushing process. Based on this, a forming gap is formed between the outer wall of the bending core and the inner wall of the forming cavity, which is adapted to the wall thickness of the pipe to be bent. The pushing mechanism drives the pipe to be bent to enter the gap along the straight section and move along the bending section, realizing the sequential bending and forming of the pipe. Each formed pipe automatically replaces the previous pipe and is fitted onto the bending section of the bending core. This application can realize the automatic continuous pushing, sequential forming and automatic unloading of pipes, completing continuous pipe bending operations without the need for manual or robotic arms to handle pipes, significantly improving production efficiency. At the same time, the ingenious structure reduces equipment costs.

[0007] As a preferred embodiment of this utility model, the pusher tube is at least a hollow tubular structure at the pusher end.

[0008] By adopting the above technical solution, it is easy to connect with the pipe to be bent, so as to achieve stable material feeding.

[0009] As a preferred technical solution of this utility model, the pushing end of the pushing tube is provided with a recessed part or a protruding part. When pushing the material, the recessed part or the protruding part is engaged with the end of the pipe to be bent, so as to restrict the circumferential rotation of the pipe to be bent during the feeding process.

[0010] By adopting the above technical solution, a recessed or protruding part is provided at the pushing end of the pushing pipe fitting. When pushing, the recessed or protruding part is engaged with the end of the pipe to be bent, thereby effectively restricting the circumferential rotation of the pipe during the feeding process. This structure can ensure that the pipe enters the forming cavity at the correct angle, prevent the deviation of the bending direction caused by the rotation of the pipe, and improve the consistency of the bending quality.

[0011] As a preferred technical solution of this utility model, it also includes a positioning seat, which is disposed between the forming mold and the pushing mechanism. The positioning seat has a positioning space for accommodating the pipe to be bent. The pushing pipe can reciprocate relative to the positioning space and push the pipe to be bent in the positioning space toward the forming mold under the drive of the pushing driver.

[0012] By adopting the above technical solution, the positioning seat can pre-position each pipe to be bent, ensuring that the pipe is in the correct position and posture before being pushed, avoiding pipe deviation or tilting during the feeding process, and improving feeding stability and forming accuracy.

[0013] As a preferred technical solution of this utility model, the molding die includes an upper die and a lower die. The lower surface of the upper die is provided with an upper molding groove, and the upper surface of the lower die is provided with a lower molding groove. When the upper die and the lower die are closed, the upper molding groove and the lower molding groove together form the molding cavity.

[0014] By adopting the above technical solutions, the split mold structure facilitates the processing and precision control of the forming cavity, reducing the difficulty of mold manufacturing; at the same time, the opening and closing action of the upper and lower molds is beneficial to the installation and maintenance of the bent tube core. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the pusher fitting and the pipe material in this utility model.

[0018] Reference numerals: 1. Molding mold; 2. Pushing mechanism; 3. Lower mold; 4. Pushing tube fitting; 5. Bending core; 6. Straight section; 7. Bending section; 8. Tube; 9. Positioning seat; 10. Recess; 11. Protrusion; 12. Positioning plate; 13. Clamping seat; 14. Upper mold. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1-3The illustrated tube bending forming mechanism includes a forming mold 1 and a pushing mechanism 2. The pushing mechanism 2 is positioned opposite to the forming mold 1, with its pushing end facing the forming cavity of the forming mold 1 (the forming cavity is generally a curved channel, its outline similar to the shape of the bent tube core 5, including a straight cavity segment corresponding to the straight segment 6 of the bent tube core 5 and a curved cavity segment corresponding to the curved segment 7 of the bent tube core 5). The pushing mechanism 2 includes a pushing driver (which can be a pneumatic cylinder, electric cylinder, or hydraulic cylinder, etc.; how the pushing driver is installed is not the focus of this application, it can be installed on a frame or mounting plate) and a pushing tube 4. The bent tube core 5 is provided inside the forming cavity. The bending core 5 includes a straight section 6 and a bent section 7. A bent tube 8 is fitted onto the bent section 7 of the bending core 5, so that the bending core 5 is suspended within the forming cavity. A forming gap is formed between the outer wall of the bending core 5 and the inner wall of the forming cavity, matching the wall thickness of the tube 8 to be bent. The pusher driver drives the tube 8 to be bent along the straight section 6 of the bending core 5 into the forming gap and moves along the bent section 7 of the bending core 5, thereby achieving the sequential bending and forming of the tube 8. Each formed tube 8 replaces the previous tube 8 fitted onto the bent section 7 of the bending core 5. In this embodiment, the tube 8 has a hollow structure, such as... Figure 3 As shown.

[0022] Preferably, the length of the straight segment 6 of the bending core 5 is greater than or equal to the length of the pipe 8 to be bent. With this structure, when the pusher fitting 4 drives the pipe 8 to be bent into the bending core 5, the pipe 8 can completely cover the outside of the straight segment 6, ensuring stable straight guidance before entering the bending section 7. This avoids deflection due to insufficient guidance, thus significantly improving feeding stability and bending accuracy. Of course, the length of the straight segment 6 can also be slightly shorter than the length of the pipe 8. In this case, the front end of the pipe 8 can enter the bending section 7 earlier during the pushing process, still achieving bending. However, the straight guiding length is relatively shorter, and the stability is slightly inferior to the former. Those skilled in the art can reasonably select the length of the straight segment 6 according to the actual pipe specifications and bending requirements; no strict limitation is made here.

[0023] By setting a bent core 5 with a straight segment 6 and a curved segment 7, and pre-fitting a bent tube 8 onto the curved segment 7 of the bent core 5, with the outer wall of the curved tube 8 fitting against the inner wall of the forming cavity, the bent core 5 is suspended entirely within the forming cavity. Since the straight segment 6 of the bent core 5 guides the tube 8 to be bent, and the curved segment 7 is fitted with the pre-fitted tube 8, the two work together to precisely suspend and position the bent core 5 in the radial direction. Simultaneously, the fitting relationship between the straight segment 6 and the tube 8 restricts the circumferential rotation of the bent core 5, while the axial constraint of the bent tube 8 on the curved segment 7 (e.g., geometrical limits of the bending path) restricts the axial movement of the bent core 5. Therefore, the bent core 5 maintains a stable position and posture throughout the continuous pushing process. Based on this, a forming gap is formed between the outer wall of the bending core 5 and the inner wall of the forming cavity, which is adapted to the wall thickness of the pipe 8 to be bent. The pushing mechanism 2 drives the pipe 8 to be bent to enter the gap along the straight section 6 and move along the bending section 7, realizing the bending and forming of the pipe 8 one by one. Each formed pipe 8 automatically replaces the previous pipe 8 and is fitted onto the bending section 7 of the bending core 5. This application can realize the automatic continuous pushing, forming and automatic unloading of the pipe 8, and complete the continuous pipe bending operation. There is no need for manual or robotic arms to pick up and put down the pipe 8, which significantly improves the production efficiency. At the same time, the ingenious structure reduces the equipment cost.

[0024] It also includes a positioning seat 9, which is disposed between the forming mold 1 and the pushing mechanism 2. The positioning seat 9 has a positioning space for accommodating the pipe 8 to be bent. The pushing pipe 4 can reciprocate relative to the positioning space and push the pipe 8 to be bent in the positioning space toward the forming mold 1 under the drive of the pushing driver.

[0025] The positioning seat 9 can pre-position each pipe 8 to be bent, ensuring that the pipe 8 is in the correct position and posture before being pushed, avoiding the pipe 8 from shifting or tilting during the feeding process, and improving the feeding stability and forming accuracy.

[0026] The pusher fitting 4 has a recessed portion 10 or a protruding portion 11 at its pusher end. During pusher operation, the recessed portion 10 or the protruding portion 11 engages with the end of the pipe to be bent 8 to restrict circumferential rotation of the pipe to be bent 8 during feeding. In this embodiment, at least the pusher end of the pusher fitting 4 is a hollow tubular structure, which facilitates docking with the pipe to be bent 8. The pusher end is the end facing the pipe 8.

[0027] By adopting the above technical solution, it is easy to connect with the pipe to be bent, so as to achieve stable material feeding.

[0028] A recessed portion 10 or a protruding portion 11 is provided at the pushing end of the pushing fitting 4. During pushing, the recessed portion 10 or the protruding portion 11 engages with the end of the pipe 8 to be bent, thereby effectively restricting the circumferential rotation of the pipe 8 during the feeding process. This structure ensures that the pipe 8 enters the forming cavity at the correct angle, preventing deviation in the bending direction caused by the rotation of the pipe 8, and improving the consistency of the bending quality. In addition, the recessed-protruding engagement structure can also be provided between the pipes 8. For pipes 8 with beveled ends, one beveled end naturally forms a protruding portion 11, and the other beveled end has a recessed portion 10. When multiple pipes 8 are fed in sequentially, the protruding portion 11 of the next pipe engages with the recessed portion 10 of the previous pipe end-to-end, thereby restricting the circumferential rotation of the pipe 8 and ensuring the consistency of the bending direction.

[0029] The positioning seat 9 includes a positioning plate 12 and a clamping seat 13. The positioning plate 12 has a positioning groove that matches the shape of the outer wall of the pipe to be bent 8. The clamping seat 13 has a clamping groove that matches the shape of the outer wall of the pipe to be bent 8. The positioning groove and the clamping groove are engaged to form the positioning space.

[0030] The positioning seat 9 adopts a split structure of positioning plate 12 and clamping seat 13. Both have positioning grooves and clamping grooves adapted to the shape of the outer wall of the pipe 8 to be bent. When aligned, they form a positioning space. The clamping seat 13 pushes the pipe 8 to be bent into the positioning space formed between them each time, facilitating feeding by the pushing mechanism 2. In this embodiment, the specific feeding method of the clamping seat 13 pushing the pipe 8 to be bent into the positioning space is prior art and not the focus of this application. Furthermore, the positioning seat 9 is not limited to a split structure; it can also adopt an integrated structure, using a robotic arm or other conventional feeding mechanism to feed the pipe 8 into the positioning space (positioning holes inside, or positioning grooves on the top, etc., whose shape can adapt to the pipe 8). The purpose of this application is to feed the pipes 8 to be bent one by one between the forming mold 1 and the pushing mechanism 2, so as to facilitate the automatic feeding and continuous bending of the pipes 8. This is not the focus of this application.

[0031] The forming mold 1 includes an upper mold 14 and a lower mold 3. The lower surface of the upper mold 14 has an upper forming groove, and the upper surface of the lower mold 3 has a lower forming groove. When the upper mold 14 and the lower mold 3 are closed, the upper and lower forming grooves together form the forming cavity. The split mold structure facilitates the processing and precision control of the forming cavity, reducing the difficulty of mold manufacturing. Simultaneously, the opening and closing action of the upper mold 14 and the lower mold 3 is beneficial for the installation and maintenance of the bent pipe core 5. It should be noted that although the forming mold 1 in this embodiment uses a split structure of upper mold 14 and lower mold 3, it is not the only implementation method. In other embodiments, the forming mold 1 can also adopt an integrated structure, that is, the forming cavity can be directly formed on the mold body, which can also achieve the suspension of the bent pipe core 5 and the continuous forming of the pipe 8.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A pipe bending forming mechanism, comprising a forming mold (1) and a pushing mechanism (2), wherein the pushing mechanism (2) is disposed opposite to the forming mold (1) and the pushing end of the pushing mechanism (2) is directly opposite to the forming cavity of the forming mold (1), for driving a hollow pipe (8) to be bent into the forming cavity; the pushing mechanism (2) comprises a pushing driver and a pushing fitting (4); characterized in that: The forming cavity is provided with a bent core (5), which includes a straight section (6) and a curved section (7). The pusher tube (4) can drive the pipe to be bent (8) to be inserted into the bent core (5) and move along the path of its straight section (6) and curved section (7) to realize the bending and forming of the pipe (8) one by one.

2. The pipe bending forming mechanism according to claim 1, characterized in that: The pusher tube (4) has at least a hollow tubular structure at the pusher end.

3. The tube bending forming mechanism according to claim 1 or 2, characterized in that: The pusher end of the pusher fitting (4) is provided with a recess (10) or a protrusion (11). When pushing, the recess (10) or protrusion (11) is engaged with the end of the pipe to be bent (8) to restrict the circumferential rotation of the pipe to be bent (8) during the feeding process.

4. The pipe bending forming mechanism according to claim 1, characterized in that: It also includes a positioning seat (9), which is located between the forming mold (1) and the pushing mechanism (2). The positioning seat (9) has a positioning space for accommodating the pipe to be bent (8). The pushing pipe (4) can reciprocate relative to the positioning space and push the pipe to be bent (8) in the positioning space towards the forming mold (1) under the drive of the pushing driver.

5. The pipe bending forming mechanism according to claim 1, characterized in that: The molding die (1) includes an upper die (14) and a lower die (3). The lower surface of the upper die (14) is provided with an upper molding groove, and the upper surface of the lower die (3) is provided with a lower molding groove. When the upper die (14) and the lower die (3) are closed, the upper molding groove and the lower molding groove together form the molding cavity.

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