Special-shaped pipe bending process and bending equipment

Abstract

The invention discloses a special-shaped pipe bending process and bending equipment, and relates to the technical field of metal pipe fitting machining, the special-shaped pipe bending process comprises the following steps that S1, a limiting structure is arranged in a U-shaped groove of a special-shaped pipe; s2, the special-shaped pipe is subjected to bending machining; and S3, the limiting structure is disassembled. Bending equipment comprises a machine body, a bending disc, a positioning device and a bending device. The positioning device is located below the bending disc and comprises a fixed part, a movable part and a first driving part. The bending device comprises a rotating arm, a second driving piece, a placing frame and a third driving piece; the rotating arm is rotationally connected with the machine body; the second driving piece can drive the rotating arm to rotate; and the third driving piece can drive the placing frame to move so that the special-shaped pipe can be clamped. According to the special-shaped pipe bending device, the influence of bending on the shape of the special-shaped pipe can be reduced, so that the quality of the bent special-shaped pipe can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of metal pipe processing, and in particular to a special-shaped pipe bending process and bending equipment. Background Art

[0002] Metal pipe fittings are used in many fields. By utilizing the ductility of metal materials, metal pipe fittings can usually be bent into the required shape according to demand. Common metal pipe fittings include round metal pipe fittings and square metal pipe fittings. Special requirements can also be made on the cross-sectional shape of metal pipe fittings according to demand. In this case, it is called a special-shaped pipe.

[0003] Some common furniture and bar chairs in daily life usually use some special-shaped tubes in their overall frame and supporting structure. As shown in the figure, one side of the special-shaped tube has a U-shaped groove, which makes the cross-section of the special-shaped tube crescent-shaped. At the same time, the special-shaped tube needs to be bent into a shape similar to a runway.

[0004] In the existing process of bending the above-mentioned special-shaped tube by a bending device, the special-shaped tube is easily deformed, resulting in a change in the cross-sectional shape of the special-shaped tube after final bending, thereby affecting the processing quality of the special-shaped tube after bending. Summary of the invention

[0005] The present application provides a special-shaped tube bending process and bending equipment, which can reduce the influence of bending on the shape of the special-shaped tube, thereby effectively improving the quality of the special-shaped tube after bending.

[0006] On the one hand, the present application provides a special-shaped tube bending process, which adopts the following technical solution: A special-shaped tube bending process comprises the following steps: S1. A limiting structure is arranged in the U-shaped groove of the special-shaped tube, and the limiting structure contacts and abuts against the groove wall of the U-shaped groove; S2, bending the special-shaped tube; S3, disassembling the limiting structure.

[0007] By adopting the above technical solution, the limiting structure bends in the U-shaped groove as the special-shaped tube is bent, which can effectively reduce the deformation of the special-shaped tube during the bending process and reduce the influence of the bending on the shape of the special-shaped tube, thereby effectively improving the quality of the special-shaped tube after bending.

[0008] Optionally, the limiting structure is made of metal material.

[0009] By adopting the above technical solution, the structural stability of the limiting structure after being deformed by the bending of the special-shaped tube can be effectively improved, thereby improving the limiting effect of the limiting structure on the special-shaped tube during the bending process.

[0010] Optionally, the limiting structure is made of rubber material.

[0011] By adopting the above technical solution, the destructiveness of the limiting structure on the surface of the special-shaped tube can be effectively reduced, thereby effectively reducing the probability of the special-shaped tube being damaged by the limiting structure during the bending process.

[0012] Optionally, the limiting structure includes a rigid member and two flexible members; After the limiting structure is arranged in the U-shaped groove, the rigid part is clamped and positioned in the two flexible parts, and the two flexible parts are respectively in contact with and abut against the groove walls on both sides of the U-shaped groove.

[0013] By adopting the above technical solution, the limiting structure can have the characteristics of strong structural stability and low destructiveness to the special-shaped tube, thereby further reducing the influence of bending on the shape of the special-shaped tube, and further effectively improving the quality of the special-shaped tube after bending.

[0014] On the other hand, the present application also provides a bending device, which adopts the following technical solution: A bending device is used in the above-mentioned special-shaped tube bending process and is used to bend the special-shaped tube, comprising a machine body, a bending plate, a positioning device and a bending device; The bending plate is arranged on the machine body, and its axis is horizontal; The positioning device is located below the bending disk, and includes a fixed part, a movable part and a first driving part; the fixed part is arranged on the machine body and is aligned with the bending disk in the vertical direction; the movable part is located below the fixed part and can move in the vertical direction relative to the machine body; the first driving part is arranged on the machine body and can drive the movable part to clamp the end of the special-shaped tube; The bending device includes a rotating arm, a second driving member, a placement rack and a third driving member; the rotating arm is rotatably connected to the machine body, and the rotation axis of the rotating arm coincides with the axis of the bending disk; the second driving member is arranged on the machine body and can drive the rotating arm to rotate; the placement rack is arranged on the rotating arm for placing the special-shaped tube, is aligned with the bending disk along the radial direction of the bending disk, and can make circular motion on the circumferential side of the bending disk with the rotating arm; the third driving member is arranged on the rotating arm, and can drive the placement rack to move relative to the rotating arm so that the special-shaped tube is clamped between the placement rack and the bending disk, and the movement direction of the placement rack is perpendicular to the rotation axis of the rotating arm.

[0015] By adopting the above technical scheme, after the limiting structure is inserted into the U-shaped groove of the special-shaped tube, the end of the special-shaped tube is clamped and positioned by the positioning device, and the bending device drives the special-shaped tube to rotate around the bending disk near the clamped position, so that the bending process of the special-shaped tube near the clamped position can be completed, and the operation is repeated once on the other end of the special-shaped tube to complete the bending process of the entire special-shaped tube, and then the limiting structure can be removed from the special-shaped tube. The operation is convenient and quick, and the bending process of the special-shaped tube has a high quality.

[0016] Optionally, auxiliary devices are also included; The auxiliary device includes a seat body and a first abutment member; the seat body is arranged on the placement rack and is located on the outer side of the special-shaped tube placed on the placement rack; the first abutment member is used to contact the side of the limiting structure on the special-shaped tube facing away from the bending disk, and the first abutment member rotates with the rotating arm to maintain contact with the limiting structure.

[0017] By adopting the above technical solution, the first abutment member can maintain contact with the limiting structure on the special-shaped tube at the bending point of the special-shaped tube during the bending process of the special-shaped tube, thereby improving the stability of the limiting structure when bending as the special-shaped tube is bent, and further improving the limiting effect of the limiting structure on the bent tube during the bending process.

[0018] Optionally, the first abutment member is in a cylindrical structure, which is rotatably connected to the seat body, and its rotation axis coincides with its own axis and is parallel to the rotation axis of the rotating arm.

[0019] By adopting the above technical solution, the first abutment member can be easily moved relative to the limiting structure while maintaining contact with the limiting structure, thereby reducing the influence of friction between the two and effectively reducing the probability of damage caused by mutual contact between the first abutment member and the limiting structure.

[0020] Optionally, the auxiliary device further comprises a second abutment member and a fourth driving member; The second abutment member is disposed at one end of the seat body close to the rotation axis of the rotating arm, and is used to contact with a side of the limiting structure on the special-shaped tube close to the bending disk, and is movably connected to the seat body and its movable direction is parallel to the rotation axis of the rotating arm; The fourth driving member is disposed on the base body and is capable of driving the second abutting member to move.

[0021] By adopting the above technical solution, during the process of the limiting structure being bent and deformed as the special-shaped tube is bent, the second abutment member and the first abutment member can respectively maintain abutment against the two sides of the limiting structure, further improving the stability of the limiting structure when bending as the special-shaped tube is bent, thereby further improving the limiting effect of the limiting structure on the bending tube during the bending process.

[0022] Optionally, the second abutment member is rotatable relative to the seat body, and a rotation axis of the second abutment member is parallel to a rotation axis of the first abutment member.

[0023] By adopting the above technical solution, the second abutment member can be easily moved relative to the limiting structure while maintaining contact with the limiting structure, thereby reducing the influence of friction between the two and effectively reducing the probability of damage caused by mutual contact between the second abutment member and the limiting structure.

[0024] Optionally, both ends of the limiting structure have limiting parts, and the limiting parts are located outside the U-shaped groove and contact and abut against the end of the special-shaped tube.

[0025] By adopting the above technical solution, the position stability of the limiting structure relative to the special-shaped tube after it is inserted into the U-shaped groove can be effectively improved, thereby effectively reducing the probability that the limiting structure will slide along the U-shaped groove during the bending process of the special-shaped tube, thereby affecting its limiting effect on the special-shaped tube.

[0026] In summary, the present application includes at least one of the following beneficial effects: 1. It can effectively reduce the deformation of the special-shaped tube during the bending process, reduce the influence of bending on the shape of the special-shaped tube, and thus effectively improve the quality of the special-shaped tube after bending; 2. The bending process of special-shaped tubes is convenient and quick to operate, and the bending process of special-shaped tubes has high quality; 3. It can effectively improve the limiting effect of the limiting structure in the process of special-shaped tube bending, so as to effectively ensure the quality of special-shaped tube bending; 4. It can effectively improve the position stability of the limiting structure during the bending process of the special-shaped tube, thereby effectively ensuring its limiting effect on the special-shaped tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the special-shaped tube after bending processing in this application; Figure 2 It is a schematic structural diagram when the limiting structure on the special-shaped tube in Example 1 of the present application is made of a metal material or a rubber material; Figure 3 It is a schematic diagram of the structure in which the limiting structure on the special-shaped tube in Example 1 of the present application is composed of a rigid part and a flexible part; Figure 4 This is a schematic structural diagram of a bending device according to Embodiment 2 of the present application; Figure 5 This is a front view of a bending device in Example 2 of the present application performing initial bending on a special-shaped tube; Figure 6 This is a front view of a bending device in Example 2 of the present application after the special-shaped tube is initially bent; Figure 7 This is a front view of a bending device in Example 2 of the present application when bending a special-shaped tube again; Figure 8 is a cross-sectional view of a bending device according to Embodiment 2 of the present application; Fig. 9 yes Figure 8 The enlarged view of point A in the middle; Fig.10 It is a schematic diagram of the structure after the special-shaped pipe in Example 2 of the present application is clamped into the limiting structure.

[0028] Explanation of the accompanying drawings: 1. Special-shaped tube; 11. U-shaped groove; 2. Limiting structure; 21. Rigid part; 22. Flexible part; 23. Limiting part; 3. Machine body; 4. Operating space; 5. Bending disk; 6. Positioning device; 61. Fixed part; 62. Movable part; 63. First driving part; 64. Positioning rod; 7. Bending device; 71. Rotating arm; 72. Placement rack; 73. Second driving part; 74. Third driving part; 8. Auxiliary device; 81. Base; 82. First abutting part; 83. Second abutting part; 84. Fourth driving part. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-10 This application is described in further detail.

[0030] Embodiment 1: Reference Figure 1 and Figure 2 The embodiment of the present application discloses a special-shaped tube bending process, which is used to bend the special-shaped tube 1 into a runway shape (the two ends are semicircular arc tracks and the middle section is a straight track). The special-shaped tube 1 is a hollow straight tube before the bending process, and a U-shaped groove 11 is provided on one side of the radial direction of the special-shaped tube 1, so that the cross-section of the special-shaped tube 1 is a hollow crescent shape; after the bending process of the special-shaped tube 1 is completed, the opening direction of the U-shaped groove 11 is parallel to the axis of the semicircular arc track of the special-shaped tube 1.

[0031] A special-shaped tube bending process comprises the following steps: S1. A limiting structure 2 is arranged in the U-shaped groove 11 of the special-shaped tube 1, and the limiting structure 2 contacts and abuts against the groove wall of the U-shaped groove 11.

[0032] Before the special-shaped tube 1 is bent, the strip-shaped limiting structure 2 is inserted into the U-shaped groove 11 of the special-shaped tube 1, so that the limiting structure 2 can maintain contact and abutment with the groove walls on three sides of the U-shaped groove 11 at the same time. At the same time, the limiting structure 2 has a certain position stability relative to the special-shaped tube 1, so that it can maintain the state of being inserted into the U-shaped groove 11 during the bending and deformation process of the special-shaped tube 1, and stably limit the special-shaped tube 1, effectively reducing the change in the cross-sectional shape of the special-shaped tube 1 after the bending process.

[0033] S2, bending the special-shaped tube 1.

[0034] The special-shaped tube 1 is bent by the bending equipment for multiple times, and the straight special-shaped tube 1 is bent to obtain a track-shaped special-shaped tube 1. In this embodiment, the special-shaped tube 1 is preferably bent twice to complete the bending process, and each bending can form a semicircular arc track structure at the end of the special-shaped tube 1.

[0035] S3. Disassemble the limiting structure 2.

[0036] After the bending process of the special-shaped tube 1 is completed, the limiting structure 2 inserted into the U-shaped groove 11 is removed.

[0037] During the specific operation, the limiting structure 2 can be inserted into the U-shaped groove 11 of the special-shaped tube 1 twice, and the limiting structure 2 is inserted into the U-shaped groove 11 corresponding to the single-bent part of the special-shaped tube 1. After the special-shaped tube 1 is bent once, the corresponding limiting structure 2 can be removed; before the special-shaped tube 1 is bent again, the limiting structure 2 is installed on the special-shaped tube 1 to complete another bending.

[0038] Alternatively, the entire limiting structure 2 may be inserted into the U-shaped groove 11 of the special-shaped tube 1 at one time, so that the limiting structure 2 is completely distributed in the U-shaped groove 11 , and the limiting structure 2 may be removed after the special-shaped tube 1 is bent twice.

[0039] Furthermore, during the bending process of the special-shaped tube 1, the limiting structure 2 needs to maintain a certain structural stability in the U-shaped groove 11 so that it can effectively play a limiting effect and reduce the probability of the cross-sectional shape of the special-shaped tube 1 changing during the bending process; and the limiting structure 2 also needs to have a certain flexibility and ductility to facilitate it to bend and deform as the special-shaped tube 1 bends, and at the same time can effectively reduce the probability of its surface being damaged due to contact with the surface of the special-shaped tube 1 during the bending process of the special-shaped tube 1.

[0040] Reference Figure 2 On the one hand, the limiting structure 2 can be preferably made of a metal material with good flexibility and ductility (such as copper), so that the limiting structure 2 has both high structural stability and less damage to the special-shaped tube 1.

[0041] On the other hand, the limiting structure 2 can be preferably made of a rubber material with good structural stability (such as polyurethane rubber), which can also enable the limiting structure 2 to have both high structural stability and less damage to the special-shaped pipe 1.

[0042] Reference Figure 3 On the other hand, the limiting structure 2 can be preferably composed of a rigid member 21 and two flexible members 22, and both the rigid member 21 and the flexible member 22 are long plate-like structures. In this embodiment, the rigid member 21 is preferably made of a bendable metal material, and the flexible member 22 is preferably made of an elastic rubber material.

[0043] The rigid part 21 and the two flexible parts 22 are combined in a mutually overlapping manner to form a limiting structure 2, and the two flexible parts 22 are respectively located on both sides of the rigid part 21; when the limiting structure 2 is inserted into the U-shaped groove 11 of the special-shaped tube 1, the two flexible parts 22 are respectively in contact with the groove walls on both sides of the U-shaped groove 11 and are squeezed and deformed, and at the same time, the rigid part 21 will be clamped and positioned between the two flexible parts 22, which can also enable the limiting structure 2 to have both high structural stability and less damage to the special-shaped tube 1.

[0044] Embodiment 2: Reference Figure 1 and Figure 4 The embodiment of the present application discloses a bending device, which is applied to a bending process of a special-shaped tube 1 as disclosed in Example 1, and is used for bending the special-shaped tube 1 in step S2. At this time, the limiting structure 2 used in the special-shaped tube 1 is made of rubber material, and at this time, after the limiting structure 2 is inserted into the U-shaped groove 11, a part of it is located on one side of the radial direction of the special-shaped tube 1.

[0045] Reference Figure 4 and Figure 5 The bending device includes a machine body 3, a bending plate 5, a positioning device 6, a bending device 7 and an auxiliary device 8. The machine body 3 is used as a mounting carrier for other structures of the bending device; the bending plate 5 is used to help the special-shaped tube 1 bend to form a semicircular arc track structure; the positioning device 6 is used to position the special-shaped tube 1; the bending device 7 is used to assist the special-shaped tube 1 to complete the bending process with the help of the bending plate 5; the auxiliary device 8 is used to assist the limiting structure 2 to maintain and ensure its limiting effect during the bending process of the special-shaped tube 1.

[0046] The machine body 3 is fixedly installed on the ground, and one side of the machine body 3 is an operating space 4 for workers to perform bending processing on the special-shaped pipe 1.

[0047] The bending disk 5 is a disk structure as a whole, and is fixedly installed on one side of the machine body 3 and located in the operating space 4, and the axis of the bending disk 5 is installed in a horizontal state. In this embodiment, it is preferred that one side of the bending disk 5 has a vertical and flat incision, and only the side of the bending disk 5 facing away from the incision is used to assist the bending of the special-shaped tube 1.

[0048] The positioning device 6 is installed in the operating space 4 and is located near the position below the cutout of the bending plate 5. The positioning device 6 includes a fixed member 61, a movable member 62 and a first driving member 63. The fixed member 61 and the movable member 62 cooperate with each other to clamp and position the end of the special-shaped tube 1; the first driving member 63 is used to drive the movable member 62 to move, thereby achieving the clamping and loosening of the end of the special-shaped tube 1 on the positioning device 6.

[0049] The fixing part 61 is fixedly mounted on the machine body 3, located below the bending disk 5, and located on the side of the bending disk 5 close to its own incision. The bottom of the fixing part 61 has a groove that matches the special-shaped tube 1. When the end of the special-shaped tube 1 is fully matched with the groove on the fixing part 61, the length direction of the special-shaped tube 1 is horizontal and perpendicular to the axis of the bending disk 5, and the special-shaped tube 1 can contact and abut against the bottom of the bending disk 5. In this embodiment, it is preferred that the bending disk 5 also has a groove on its own arc surface that matches the special-shaped tube 1, so as to facilitate the subsequent bending of the special-shaped tube 1 along the arc surface of the bending disk 5.

[0050] The first driving member 63 is fixedly mounted on the machine body 3 and is located below the fixed member 61. The movable member 62 is fixedly connected to the first driving member 63, is located between the first driving member 63 and the fixed member 61, can move in the vertical direction relative to the machine body 3, and is aligned with the fixed member 61 in the vertical direction. In this embodiment, the first driving member 63 is preferably a servo cylinder, and the end of the piston rod of the first driving member 63 is fixedly connected to the movable member 62; since the servo cylinder is a common prior art, it will not be described in detail here, and it is only briefly shown in the drawings.

[0051] The top of the movable member 62 also has a groove adapted to the special-shaped tube 1. When the movable member 62 moves upward to the limit position, the movable member 62 and the fixing member 61 will clamp the end of the special-shaped tube 1 in place.

[0052] Reference Figure 4 and Figure 6The bending device 7 includes a rotating arm 71, a second driving member 73, a placing frame 72 and a third driving member 74. The rotating arm 71 is used to drive the special-shaped tube 1 to make a circular motion on one side of the bending disk 5, so that the special-shaped tube 1 can be bent and deformed by the bending disk 5; the second driving member 73 provides power for the rotating arm 71; the placing frame 72 is used for placing the special-shaped tube 1, so that the rotating arm 71 rotates to drive the special-shaped tube 1 to make a circular motion; the third driving member 74 provides power for the placing frame 72, so as to control whether the special-shaped tube 1 on the placing frame 72 is tightly against the bending disk 5.

[0053] The rotating arm 71 is rotatably installed on the machine body 3 and is located in the operating space 4. Its rotation axis coincides with the axis of the bending disk 5, and the end of the rotating arm 71 away from the machine body 3 is located on one side of the radial direction of the bending disk 5 and extends in a direction parallel to the axial direction of the bending disk 5 in a direction away from the machine body 3.

[0054] The second driving member 73 is fixedly mounted on the machine body 3, and can drive the rotating arm 71 to rotate relative to the machine body 3. In this embodiment, the second driving member 73 is preferably mounted on the top of the machine body 3, and the second driving member 73 is preferably a servo cylinder, which drives the rack to move inside the machine body 3 in a horizontal direction and perpendicular to the rotation axis of the rotating arm 71. The structure of the rotating arm 71 located inside the machine body 3 has a gear meshing with the above-mentioned rack, and the second driving member 73 can drive the rotating arm 71 to rotate by controlling the movement of the rack; since the servo cylinder and the above-mentioned transmission structure are both common existing technologies, they are not described here in detail, and they are only briefly shown in the drawings.

[0055] Reference Figure 5 and Figure 6 , the second driving member 73 has a limit in the process of driving the rotating arm 71 to rotate. When the second driving member 73 drives the rotating arm 71 to rotate to the extreme position in the direction close to the positioning device 6, the end of the rotating arm 71 away from the machine body 3 will be located below the bending disk 5; when the second driving member 73 drives the rotating arm 71 to rotate to the extreme position in the direction away from the positioning device 6, the end of the rotating arm 71 away from the machine body 3 will be located above the bending disk 5. In this embodiment, it is preferred that the second driving member 73 drives the rotating arm 71 to rotate by 180°.

[0056] The third driving member 74 is fixedly mounted on one end of the rotating arm 71 away from the machine body 3, and the placement frame 72 is mounted on the side of the rotating arm 71 away from the machine body 3, and is aligned with the bending disk 5 along the radial direction of the bending disk 5; the placement frame 72 is fixedly connected to the third driving member 74, and the third driving member 74 can drive the placement frame 72 to move relative to the rotating arm 71 in a direction perpendicular to the rotation axis of the rotating arm 71. In this embodiment, the third driving member 74 is preferably a servo cylinder.

[0057] When the second driving member 73 drives the rotating arm 71 to rotate to the extreme position in the direction close to the positioning device 6, the length direction of the placement frame 72 is horizontal and perpendicular to the rotation axis of the rotating arm 71, and the placement frame 72 can be vertical relative to the direction of movement of the rotating arm 71. The side of the placement frame 72 close to the bending plate 5 has a groove adapted to the special-shaped tube 1, and the groove extends along the length direction of the placement frame 72.

[0058] At this time, when the third driving member 74 drives the placement rack 72 to move to the extreme position in the direction away from the bending disk 5 and the first driving member 63 drives the movable member 62 to move downward to the extreme position, at this time, the end of the placement rack 72 close to the movable member 62 is close to the movable member 62, and the placement rack 72 is aligned with the movable member 62 along its own length direction, that is, the special-shaped tube 1 can be placed on the movable member 62 and the placement rack 72 in a horizontal state at the same time.

[0059] When the third driving member 74 drives the placement rack 72 to move to the extreme position in the direction close to the bending disk 5 and the first driving member 63 drives the movable member 62 to move upward to the extreme position, the placement rack 72 is also aligned with the movable member 62 along its own length direction, and the special-shaped tube 1 placed on the placement rack 72 will be clamped between the placement rack 72 and the bottom of the bending disk 5; then, the second driving member 73 drives the rotating arm 71 to rotate to the extreme position in the direction away from the positioning device 6, and the part of the special-shaped tube 1 close to the bending disk 5 will be bent to form a semicircular arc trajectory structure under the joint action of the placement rack 72 and the bending disk 5.

[0060] Reference Figure 7 Furthermore, in order to facilitate the correct placement of the special-shaped tube 1 on the movable part 62 and the placement rack 72 after one bending and maintain the position stability after placement, thereby ensuring the quality of the special-shaped tube 1 after bending again, the positioning device 6 preferably also includes a positioning rod 64 for assisting in positioning the special-shaped tube 1 after one bending.

[0061] The positioning rod 64 is a rod-shaped structure as a whole, one end of the positioning rod 64 in the length direction is fixedly connected to the top of the fixing member 61, the positioning rod 64 is installed in a tilted state in the length direction, and the end of the positioning rod 64 away from the fixing member 61 extends upwardly in a tilted direction away from the bending disk 5.

[0062] When the third driving member 74 drives the placement rack 72 to move to the extreme position in the direction away from the bending disk 5 and the first driving member 63 drives the movable member 62 to move downward to the extreme position, the special-shaped tube 1 after one bending is placed on the movable member 62 and the placement rack 72 at the same time, the bent part of the special-shaped tube 1 can contact and resist the end of the positioning rod 64 away from the fixing member 61. At this time, the special-shaped tube 1 can keep the axis of its own semicircular arc trajectory structure parallel to the axis of the bending disk 5, so as to facilitate the next bending and forming of the special-shaped tube 1.

[0063] Reference Figure 4 and Figure 5 When the special-shaped tube 1 is placed on the placement rack 72, the opening of the U-shaped groove 11 of the special-shaped tube 1 faces away from the machine body 3 and is parallel to the axis of the bending plate 5. The auxiliary device 8 is installed on the side of the placement rack 72 close to the bending plate 5 and is located at a position of the placement rack 72 away from the machine body 3; when the special-shaped tube 1 is placed on the placement rack 72, the auxiliary device 8 will be located on the side of the special-shaped tube 1 away from the machine body 3.

[0064] Reference Figure 8 and Fig. 9 The auxiliary device 8 includes a seat body 81, a first abutting member 82, a second abutting member 83 and a fourth driving member 84. The seat body 81 is used as a mounting carrier for other structures of the auxiliary device 8; the first abutting member 82 and the second abutting member 83 are both used to abut against the portion of the limiting structure 2 inserted into the U-shaped groove 11 of the special-shaped tube 1 located outside the U-shaped groove 11; the fourth driving member 84 is used to control the movement of the second abutting member 83 to control whether the second abutting member 83 abuts against the limiting structure 2.

[0065] The seat body 81 is fixedly mounted on the placement rack 72. When the placement rack 72 rotates to the extreme position in the direction close to the positioning device 6, the seat body 81 will be aligned with the bottom of the bending disk 5. The first abutment member 82 is a cylindrical structure as a whole. The first abutment member 82 is rotatably connected with the seat body 81 and is located on the side of the seat body 81 close to the machine body 3. Its rotation axis coincides with its own axis and is parallel to the rotation axis of the bending disk 5. When the special-shaped tube 1 is placed on the placement rack 72, the first abutment member 82 will be located on the side of the limiting structure 2 on the special-shaped tube 1 close to the placement rack 72 and contact with the side of the limiting structure 2 close to the placement rack 72; in the process of the rotating arm 71 rotating to drive the special-shaped tube 1 to bend, the first abutment member 82 will maintain contact with the limiting structure 2 corresponding to the position where the special-shaped tube 1 is being bent, so as to limit the erroneous deformation of the limiting structure 2 during the bending process of the special-shaped tube 1.

[0066] The fourth driving member 84 is fixedly mounted on one side of the seat body 81 close to the bending plate 5, the second abutting member 83 is connected to the fourth driving member 84, and the fourth driving member 84 can drive the second abutting member 83 to move relative to the seat body 81 in a direction parallel to the axis of the bending plate 5. In this embodiment, the fourth driving member 84 is preferably a servo cylinder.

[0067] The second abutting member 83 is in a cylindrical structure as a whole, and its movable direction is parallel to its own axial direction. It is rotationally connected to the fourth driving member 84, and its rotation axis coincides with its own axis.

[0068] The fourth driving member 84 has a limit in the process of driving the second abutment member 83 to move relative to the seat body 81. When the fourth driving member 84 drives the second abutment member 83 to move to the extreme position in the direction close to the machine body 3, the second abutment member 83 is located at the side of the first abutment member 82 close to the bending plate 5 and is aligned with the first abutment member 82 along the radial direction of the bending plate 5; when the fourth driving member 84 drives the second abutment member 83 to move to the extreme position in the direction away from the machine body 3, the second abutment member 83 will be completely located at the side of the seat body 81 close to the bending plate 5.

[0069] When the special-shaped tube 1 is placed on the placement rack 72 and the first abutment member 82 contacts the limiting structure 2, the fourth driving member 84 drives the second abutment member 83 to move to the extreme position in the direction close to the machine body 3, and the second abutment member 83 will contact and abut against the side of the limiting structure 2 facing away from the first abutment member 82, and further limit the erroneous deformation of the limiting structure 2 on the other side of the limiting structure 2 during the bending process of the special-shaped tube 1.

[0070] At this time, as the limiting structure 2 is bent and deformed along with the special-shaped tube 1, the first abutment member 82 and the second abutment member 83 respectively play a limiting effect on both sides of the limiting structure 2, so that the limiting structure 2 can be stably limited in the U-shaped groove 11 during this process, thereby effectively improving the quality of the bending process of the special-shaped tube 1.

[0071] Reference Figure 4 and Fig.10 Furthermore, in order to improve the efficiency of the bending process of the special-shaped tube 1, the length dimension of the limiting structure 2 is preferably not less than the length dimension of the special-shaped tube 1, so that the limiting structure 2 can be completely inserted into the U-shaped groove 11 of the special-shaped tube 1.

[0072] Furthermore, in order to improve the position stability of the limiting structure 2 on the special-shaped tube 1 and reduce the probability that the limiting structure 2 slides along the U-shaped groove 11 after being subjected to force during the bending process of the special-shaped tube 1, thereby reducing its limiting effect on the special-shaped tube 1, it is preferred that both ends of the limiting structure 2 in the length direction have limiting portions 23.

[0073] When the limiting structure 2 is completely inserted into the U-shaped groove 11 of the special-shaped tube 1, the limiting parts 23 are respectively located on both sides of the length direction of the special-shaped tube 1, and are respectively tightly fitted with the ends of the special-shaped tube 1. In this embodiment, the cross-sectional size of the limiting part 23 is preferably smaller than the cross-sectional size of the special-shaped tube 1, so as to reduce the influence of the limiting part 23 on the special-shaped tube 1 during the placement and bending process on the placement rack 72.

[0074] The implementation principle of a bending device in the embodiment of the present application is: After the limiting structure 2 is completely inserted into the U-shaped groove 11 of the special-shaped tube 1, the special-shaped tube 1 is placed on the movable member 62 and the placement rack 72 at the same time, and the first abutment member 82 is in contact with the limiting structure 2; then, the first driving member 63 and the second driving member 73 are controlled to drive the movable member 62 and the placement rack 72 to move upward, so that the end of the special-shaped tube 1 is clamped and positioned on the positioning device 6, and at the same time, the initial bending position of the special-shaped tube 1 is clamped and positioned between the placement rack 72 and the bending disk 5; then, the fourth driving member 84 is controlled to drive the second abutment member 83 to move to contact with the limiting structure 2, and then the third driving member 74 is controlled to drive the rotating arm 71 to rotate, so that the special-shaped tube 1 is bent under the joint action of the placement rack 72 and the bending disk 5 to form a semicircular arc track structure. In this process, the auxiliary device 8 enables the limiting structure 2 to maintain the limiting effect on the special-shaped tube 1, so as to improve the bending quality of the special-shaped tube 1; After the special-shaped tube 1 is bent once, the first driving member 63, the second driving member 73 and the fourth driving member 84 respectively drive the movable member 62, the placement frame 72 and the second abutting member 83 to move and reset, and then the third driving member 74 drives the rotating arm 71 to rotate and reset, and then the staff can remove the special-shaped tube 1 formed by the one-time bending; Before the special-shaped tube 1 is bent again, after the special-shaped tube 1 is placed on the movable member 62 and the placement rack 72 at the same time, the part of the special-shaped tube 1 that has been bent needs to be positioned by contacting with the positioning rod 64 to facilitate its re-bending; Repeat the above steps to complete the bending and forming of the special-shaped tube 1 again, and then remove the limiting structure 2.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A special-shaped tube bending process, characterized in that: The following steps are involved: S1. A limiting structure (2) is provided in the U-shaped groove (11) of the special-shaped tube (1), and the limiting structure (2) contacts and abuts against the groove wall of the U-shaped groove (11); S2, bending the special-shaped tube (1); S3, disassembling the limiting structure (2).

2. A special-shaped tube bending process according to claim 1, characterized in that: The limiting structure (2) is made of metal material.

3. A special-shaped tube bending process according to claim 1, characterized in that: The limiting structure (2) is made of rubber material.

4. A special-shaped tube bending process according to claim 1, characterized in that: The limiting structure (2) comprises a rigid part (21) and two flexible parts (22); After the limiting structure (2) is arranged in the U-shaped groove (11), the rigid component (21) is clamped and positioned in the two flexible components (22), and the two flexible components (22) are respectively in contact with and abut against the groove walls on both sides of the U-shaped groove (11).

5. A bending device, used in the special-shaped tube bending process as claimed in claim 3, and used to bend the special-shaped tube (1), characterized in that: It comprises a machine body (3), a bending plate (5), a positioning device (6) and a bending device (7); The bending plate (5) is arranged on the machine body (3), and its axis is horizontal; The positioning device (6) is located below the bending disk (5), and comprises a fixed part (61), a movable part (62) and a first driving part (63); the fixed part (61) is arranged on the machine body (3) and is aligned with the bending disk (5) in the vertical direction; the movable part (62) is located below the fixed part (61) and is movable in the vertical direction relative to the machine body (3); the first driving part (63) is arranged on the machine body (3) and is capable of driving the movable part (62) to move and clamp the end of the special-shaped tube (1); The bending device (7) comprises a rotating arm (71), a second driving member (73), a placement rack (72) and a third driving member (74); the rotating arm (71) is rotatably connected to the machine body (3), and the rotation axis of the rotating arm (71) coincides with the axis of the bending disk (5); the second driving member (73) is arranged on the machine body (3) and is capable of driving the rotating arm (71) to rotate; the placement rack (72) is arranged on the rotating arm (71) for placing the special-shaped tube (1) and is in contact with the rotating arm (71). The bending disk (5) is aligned along the radial direction of the bending disk (5) and can make circular motion on the circumferential side of the bending disk (5) along with the rotating arm (71); the third driving member (74) is arranged on the rotating arm (71) and can drive the placement rack (72) to move relative to the rotating arm (71) so that the special-shaped tube (1) is clamped between the placement rack (72) and the bending disk (5), and the movement direction of the placement rack (72) is perpendicular to the rotation axis of the rotating arm (71).

6. A bending device according to claim 5, characterized in that: Also included is an auxiliary device (8); The auxiliary device (8) comprises a seat body (81) and a first abutment member (82); the seat body (81) is arranged on the placement rack (72) and is located on the outer side of the special-shaped tube (1) placed on the placement rack (72); the first abutment member (82) is used to contact the side of the limiting structure (2) on the special-shaped tube (1) facing away from the bending disk (5), and the first abutment member (82) rotates with the rotating arm (71) to maintain contact with the limiting structure (2).

7. A bending device according to claim 6, characterized in that: The first abutment member (82) is in a cylindrical structure and is rotatably connected to the seat body (81), with its rotation axis coinciding with its own axis and being parallel to the rotation axis of the rotating arm (71).

8. The bending device according to claim 7, characterized in that: The auxiliary device (8) further comprises a second abutment member (83) and a fourth driving member (84); The second abutment member (83) is arranged at one end of the seat body (81) close to the rotation axis of the rotation arm (71), and is used to contact a side of the limiting structure (2) on the special-shaped tube (1) close to the bending disk (5), and is movably connected to the seat body (81) and its movable direction is parallel to the rotation axis of the rotation arm (71); The fourth driving member (84) is arranged on the seat body (81) and is capable of driving the second abutting member (83) to move.

9. A bending device according to claim 8, characterized in that: The second abutment member (83) is capable of rotating relative to the seat body (81), and a rotation axis of the second abutment member (83) is parallel to a rotation axis of the first abutment member (82).

10. The bending device according to claim 5, characterized in that: Both ends of the limiting structure (2) are provided with limiting portions (23), and the limiting portions (23) are located outside the U-shaped groove (11) and are in contact with and abut against the end of the special-shaped tube (1).

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