Round pipe bending equipment

Abstract

The utility model discloses a round pipe bending device which comprises a machine frame, an acting cylinder, a clamping head, a punch and a supporting rotating block. The machine frame is of a square frame structure, the acting cylinder is installed in the middle of a top beam of the machine frame in a head-down mode, the clamping head is installed at the end of a downward piston rod of the acting cylinder, the top end of the punch is horizontally connected to the clamping head in a guiding and sliding mode, and a plurality of lower punching dies are arranged at the bottom of the punch at intervals. The diameter specifications of the arc grooves, containing the round pipes needing to be bent, of the bottom faces of the lower punching dies are different. The two supporting rotating blocks are rotationally and symmetrically connected to two opposite stand columns of the rack correspondingly, and the supporting rotating blocks support a round pipe needing to be bent. According to the circular pipe bending equipment, bending operation of circular pipes of different specifications can be completed by rapidly replacing the lower punching dies of different sizes, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of round tube processing, in particular to round tube bending equipment. Background Art

[0002] Round steel pipe is a commonly used steel section, usually called round tube, which is widely used in various fields. The most common ones are construction and industrial fields. At the same time, many household products or shelves also use round tubes as the support skeleton of the frame. In actual use, considering the strength or shape matching problems, these steel pipes must be bent.

[0003] Currently, there are two main types of equipment for bending round tubes. One uses a large guide wheel and a planetary pressure wheel to bend the tube. Manually turning the pressure wheel around the large guide wheel to a certain angle squeezes the tube and bends it along the grooves of the large guide wheel, achieving the desired bend. The other uses hydraulic equipment to drive a tube bending die from the center to bend the tube placed between two supporting blocks. In either case, bending different tube sizes requires opening the frame and replacing the large guide wheel, pressure wheel, or tube bending die with the corresponding size before the bending process can begin.

[0004] Therefore, it is necessary to develop a round tube bending equipment to address the above defects. Utility Model Content

[0005] The utility model aims to provide a round tube bending device, which can quickly replace lower punches of different sizes to complete the bending operation of round tubes of different specifications, thereby improving the operation efficiency.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The utility model discloses a circular tube bending device, comprising a frame, an operating cylinder, a chuck, a punch and a supporting rotary block; the frame is a square frame structure, the operating cylinder head is mounted downward in the middle position of the frame top beam, the downward-facing piston rod end of the operating cylinder is mounted with the chuck, the top end of the punch is horizontally guided and slidably connected to the chuck, a plurality of lower punches are arranged at intervals at the bottom of the punch, and the bottom surfaces of the plurality of lower punches accommodate arc grooves of different diameters for circular tubes to be bent; the two supporting rotary blocks are respectively rotatably symmetrically connected to two opposite columns of the frame, and the supporting rotary blocks support the circular tubes to be bent.

[0008] Furthermore, the top surface of the chuck is fixedly connected to the piston rod of the acting cylinder, and a guide groove is provided on the bottom surface of the chuck, and the axial centerline direction of the guide groove is perpendicular to the large side surface of the frame; a guide plate is provided on the top of the punch, and the guide plate is horizontally guided and slidably connected in the guide groove; multiple lower punches are arranged at equal intervals along the length direction of the guide plate below the guide plate.

[0009] Furthermore, it also includes a positioning component, which is arranged on the clamping head and locks and positions the guide plate.

[0010] Furthermore, the positioning assembly includes a top screw, the guide groove is a centrally opened T-shaped slot, and the corresponding guide plate is a T-shaped strip; a top screw hole is opened on the side wall of the guide groove, the top screw is threadedly connected to the top screw hole, and the inner end of the top screw abuts against the side wall of the T-shaped strip.

[0011] Furthermore, positioning pits are provided on the side walls of the T-shaped strips facing the top screw holes, and the number of the positioning pits is consistent with that of the lower punch and is arranged in a one-to-one correspondence; the inner end of the top screw can abut against the positioning pits.

[0012] Furthermore, the main body of the frame is formed by welding channel steel, and a clearance hole is opened at the column position where the support turn block is installed, and the round tube that needs to be bent passes through the clearance hole; the bottom ends of the frame are respectively provided with base plates for connecting anchor bolts.

[0013] Furthermore, the support turn block is installed between the wing plates of the column channel steel through a pin shaft; the support turn block adopts a prism shape, and arc grooves of different diameters are provided on the edges to be suitable for round tubes of different specifications.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are:

[0015] This practical round tube bending equipment arranges multiple lower punches of different sizes at intervals at the bottom of the punch. When changing round tubes of different sizes for bending, one only needs to move the lower punch of the corresponding size directly under the clamping head, without the need for disassembly or installation. The frame adopts a square frame structure, with a hollowed-out portion in the middle as the bending area, which allows the pipe to be branched to observe the bending angle and facilitate control of the bending size. This utility model round tube bending equipment can quickly replace lower punches of different sizes to complete bending operations of round tubes of different sizes, thereby improving work efficiency.

[0016] In addition, by cooperating with the guide plate and the guide groove, the guide plate can be moved back and forth along the guide groove, and the structure has good stability. By adding the positioning assembly, the lower punch to be used can be locked before bending, avoiding bending failure caused by the offset of the lower punch; by cooperating with the top screw hole and the positioning pit, it can be ensured that the lower punch to be used is accurately aligned with the round tube, avoiding misalignment. By selecting the channel steel welding forming frame, the structure is simple and easy to implement, the material is easy to obtain, and the equipment processing cost is reduced; by adding a bottom plate, it is convenient to use the utility model upright. By setting the support turn block to rotate around the pin shaft, the support turn block can swing with the straight tube section of the round tube during the tube bending process, avoiding hard bending here; by setting arc grooves at the edges of the support turn block, the straight tube section of the round tube can be supported to avoid the straight tube section from deflecting to one side. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 1 This is a schematic diagram of the main structure of the round tube bending equipment of the utility model;

[0019] Figure 2 This is a schematic diagram of the left side cross-sectional structure of the circular tube bending equipment of the utility model;

[0020] Figure 3 for Figure 1 Schematic diagram of the partially enlarged structure of part I in the middle;

[0021] Figure 4 This is a schematic diagram of the round tube bending equipment of the utility model in the state of bending a round tube.

[0022] Explanation of the accompanying reference numerals: 1. Frame; 101. Base plate; 102. Clearance hole; 2. Action cylinder; 3. Chuck; 301. Guide groove; 302. Top screw hole; 4. Punch; 401. Guide plate; 402. Lower punch; 403. Positioning pit; 5. Top screw; 6. Supporting rotating block; 601. Arc groove; 7. Pin; 8. Round tube. DETAILED DESCRIPTION

[0023] The core of the utility model is to provide a round tube bending device, which can quickly replace lower punches of different sizes to complete the bending operation of round tubes of different specifications, thereby improving the operation efficiency.

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0026] With reference to the accompanying drawings, Figure 1 This is a schematic diagram of the main structure of the round tube bending equipment of the utility model; Figure 2 This is a schematic diagram of the left side cross-sectional structure of the circular tube bending equipment of the utility model; Figure 3 for Figure 1 Schematic diagram of the partially enlarged structure of part I in the middle; Figure 4 This is a schematic diagram of the round tube bending equipment of the utility model in the state of bending a round tube.

[0027] In one embodiment, Figures 1 to 4 As shown, the circular tube bending equipment of the present invention is improved on the basis of the existing hydraulic cylinder die bending forming equipment. The circular tube bending equipment of the present invention includes a frame 1, an action cylinder 2, a clamping head 3, a punch 4 and a supporting turn block 6. The frame 1 is a square frame structure, the action cylinder 2 is installed with its head downward in the middle position of the top beam of the frame 1, and the piston rod end of the action cylinder 2 is installed with the clamping head 3, and the two can be connected by threaded connection or by flange plate docking. The top horizontal guide sliding connection of the punch 4 is connected to the clamping head 3, and a plurality of lower punches 402 are arranged at intervals on the bottom of the punch 4. The bottom surfaces of the plurality of lower punches 402 accommodate arc grooves of different diameter specifications that need to bend the circular tubes. In a specific embodiment, as Figure 1 and Figure 2 As shown, there are three lower punches 402, corresponding to the three commonly used sizes of 1 / 4, 1 / 6, and 1 / 8" pipes. The lower punches 402 are similar in form to conventional bending dies, also consisting of a circular arc groove, and will not be further described here. Two support blocks 6 are rotatably connected to two opposing columns of the frame 1. The support blocks 6 support the round pipe to be bent, and the required lower punch 402 is located directly above the center of the two support blocks 6.

[0028] By arranging multiple lower punches 402 of different specifications at intervals at the bottom of the punch 4, when changing to a different specification of round tube for bending, it is only necessary to move the lower punch 402 of the corresponding specification to the bottom of the clamping head 3, without the need for disassembly and installation. The frame 1 adopts a square frame structure, and the middle hollow part is the bending part, which can be used to observe the bending angle and facilitate the control of the bending size. The circular tube bending equipment of the utility model can quickly replace lower punches of different sizes to complete the bending operation of circular tubes of different specifications, thereby improving work efficiency.

[0029] In a specific embodiment of the present invention, Figures 1 to 3 As shown, the top surface of the chuck 3 is fixedly connected to the piston rod of the working cylinder 2. The bottom surface of the chuck 3 defines a guide groove 301, with the axis of the guide groove 301 perpendicular to the large side surface of the frame 1. A guide plate 401 is provided on the top of the punch 4. The cross-section of the guide plate 401 conforms to the guide groove 301 and the guide plate 401 is horizontally guided and slidably connected within the guide groove 301. Multiple lower punches 402 are arranged below the guide plate 401 at equal intervals along its length.

[0030] By cooperating with the guide plate 401 and the guide groove 301 , the guide plate 401 can move forward and backward along the guide groove 301 , and the structure has good stability.

[0031] In a specific embodiment of the present invention, Figures 1 to 3 As shown, it also includes a positioning component, which is arranged on the clamping head 3. The positioning component locks and positions the guide plate 401 to prevent the guide plate 401 from deflecting during the up and down movement of the punch 4.

[0032] Specifically, if Figures 1 to 3 As shown, the positioning assembly includes a push screw 5, a centrally located T-slot guide slot 301, and a corresponding guide plate 401, a T-shaped strip. The sidewalls of the guide slot 301 are provided with push screw holes 302, into which the push screw 5 is threaded, with the inner end of the push screw 5 abutting against the sidewalls of the T-strip. The outer end of the push screw 5 is provided with an Allen wrench hole for tightening or loosening with an Allen wrench.

[0033] Specifically, if Figures 1 to 3 As shown, the side wall of the T-shaped strip facing the screw hole 302 is provided with positioning holes 403. The number of positioning holes 403 matches and corresponds to the number of the lower punch 402. The inner end of the screw 5 can abut against the positioning holes 403. When the screw 5 is pushed into the positioning holes 403, the lower punch 402 corresponding to the positioning holes 403 is located directly below the chuck 3 and enters the working position.

[0034] Obviously, the positioning component can also adopt a pin locking method, open a full-length pin hole on the clamp 3 and the T-shaped strip, and connect the pin holes on different T-shaped strips to realize the switching of the lower punch 402. Similar simple deformation methods all fall within the protection scope of the present utility model.

[0035] By adding the positioning component, the lower punch 402 to be used can be locked before bending to avoid bending failure caused by the offset of the lower punch 402; through the coordinated setting of the top screw hole 302 and the positioning pit 403, it can be ensured that the lower punch 402 to be used is accurately aligned with the round tube to avoid dislocation.

[0036] In a specific embodiment of the present invention, Figure 1 、 Figure 2 and Figure 4 As shown, the main body of the frame 1 is welded from 12# channel steel, with the openings facing inward. A clearance hole 102 is provided at the column where the support block 6 is mounted. The round tube to be bent passes through this clearance hole 102. Specifically, the clearance hole 102 is a waist-shaped hole cut vertically, so the bent end of the round tube does not interfere with the top wall of the clearance hole 102. A base plate 101 for connecting anchor bolts is provided at each end of the bottom of the frame 1. Bolt holes are provided in the base plate 101.

[0037] By selecting channel steel to weld and form the frame 1, the structure is simple and easy to implement, the material is easy to obtain, and the equipment processing cost is reduced; by adding the bottom plate 101, the utility model can be used upright.

[0038] In a specific embodiment of the present invention, Figure 1 、 Figure 2 and Figure 4 As shown, the support block 6 is mounted between the flanges of the column channel steel via a pin 7, allowing it to rotate relative to the pin 7. The support block 6 is prismatic in shape, with arcuate grooves 601 of varying diameters centered along its edges to accommodate various sizes of round tubes. In one embodiment, the support block 6 has a triangular prism shape, with semicircular arcuate grooves 601 located along its three edges, corresponding to the sizes of quarter-inch, six-inch, and inch tubes, respectively.

[0039] By setting the support turn block 6 to rotate around the pin shaft 7, the support turn block 6 can swing along with the straight section of the circular tube during the bending process, thereby avoiding hard bending at this location; by setting an arc groove 601 at the edge of the support turn block 6, the straight section of the circular tube can be supported, thereby avoiding the straight section from deflecting to one side.

[0040] |The working process of the round tube bending equipment of this embodiment: First, select the corresponding lower punch 402 according to the specifications of the round tube to be bent. When switching the lower punch 402, use an Allen wrench to loosen the top screw 5, and the inner end of the top screw 5 will exit the positioning pit 403. Manually push and pull the guide plate 401 so that the lower punch 402 of the corresponding specification enters directly below the clamping head 3. Use the Allen wrench to tighten the top screw 5 again, and the inner end of the top screw 5 enters the corresponding positioning pit 403 and tightens it. Manually rotate the support turn blocks 6 on both sides so that the arc groove 601 corresponding to the specifications of the round tube to be bent faces upward. Hold the round tube to be bent and pass it through the clearance hole 102 on one side and out from the other side, and place it on the support turn block 6 to ensure that there is enough spare length at both ends. Press the button of the electrical control box of the operating equipment to push the cylinder 2 downward, driving the lower punch 402 to be pressed to the middle position of the round tube to be bent, and continue to move downward. Figure 4 As shown, the round tube is bent near the lower punch 402. After reaching the set angle, the button of the equipment electric control box is operated to retract the cylinder 2 upward. The bent round tube is taken out and prepared for the next bending operation.

[0041] In summary, the circular tube bending equipment of the present invention arranges multiple lower punches 402 of different specifications at intervals at the bottom of the punch 4. When changing to a different specification circular tube for bending, it is only necessary to move the lower punch 402 of the corresponding specification to the bottom of the clamp 3, without the need for disassembly and installation. The frame 1 adopts a square frame structure, and the middle hollow part is the bending part, which can be used to observe the bending angle and facilitate the control of the bending size. The circular tube bending equipment of the present invention can quickly replace lower punches of different sizes to complete the bending operation of circular tubes of different specifications, thereby improving the operation efficiency. In addition, by cooperating with the guide plate 401 and the guide groove 301, the guide plate 401 can be moved back and forth along the guide groove 301, and the structural stability is good. By adding the positioning component, the lower punch 402 to be used can be locked before bending, avoiding bending failure caused by the offset of the lower punch 402; by cooperating with the top screw hole 302 and the positioning pit 403, it can be ensured that the lower punch 402 to be used is accurately aligned with the circular tube, avoiding misalignment. By using channel steel to weld the frame 1, the structure is simple and easy to implement, and the materials are readily available, thus reducing equipment processing costs. The addition of the base plate 101 facilitates the use of the present invention in an upright position. By providing the support block 6 to rotate about the pin 7, the support block 6 can swing along with the straight section of the circular pipe during the pipe bending process, preventing hard bending at this location. By providing the circular arc groove 601 on the edge of the support block 6, the straight section of the circular pipe can be supported, preventing it from deflecting to one side.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A round tube bending device, characterized in that: The invention comprises a frame (1), an action cylinder (2), a clamping head (3), a punch (4) and a supporting rotating block (6); the frame (1) is a square frame structure, the action cylinder (2) is mounted with its head downward at the middle position of the top beam of the frame (1), the piston rod end of the action cylinder (2) facing downward is mounted with the clamping head (3), the top end of the punch (4) is horizontally guided and slidably connected to the clamping head (3), a plurality of lower punches (402) are arranged at intervals at the bottom of the punch (4), and the bottom surfaces of the plurality of lower punches (402) accommodate arc grooves of different diameters for round tubes to be bent; the two supporting rotating blocks (6) are respectively rotatably symmetrically connected to two opposite upright posts of the frame (1), and the supporting rotating blocks (6) support the round tubes to be bent.

2. The round tube bending equipment according to claim 1, characterized in that: The top surface of the clamp (3) is fixedly connected to the piston rod of the action cylinder (2); the bottom surface of the clamp (3) is provided with a guide groove (301); the axis direction of the guide groove (301) is perpendicular to the large side surface of the frame (1); the top of the punch (4) is provided with a guide plate (401); the guide plate (401) is horizontally guided and slidably connected in the guide groove (301); a plurality of lower punches (402) are arranged below the guide plate (401) at equal intervals along the length direction of the guide plate (401).

3. The round tube bending equipment according to claim 2, characterized in that: It also includes a positioning component, which is arranged on the clamping head (3) and locks and positions the guide plate (401).

4. The round tube bending equipment according to claim 3, characterized in that: The positioning assembly includes a top screw (5), the guide groove (301) is a T-shaped groove opened in the center, and the corresponding guide plate (401) is a T-shaped strip; a top screw hole (302) is opened on the side wall of the guide groove (301), the top screw (5) is threadedly connected to the top screw hole (302), and the inner end of the top screw (5) abuts against the side wall of the T-shaped strip.

5. The round tube bending equipment according to claim 4, characterized in that: A positioning pit (403) is provided on the side wall of the T-shaped strip facing the top screw hole (302), and the number of the positioning pits (403) is consistent with that of the lower punch (402) and is arranged in a one-to-one correspondence; the inner end of the top screw (5) can abut against the positioning pit (403).

6. The round tube bending equipment according to claim 1, characterized in that: The main body of the frame (1) is formed by welding channel steel. The frame (1) is provided with a clearance hole (102) at the column position where the supporting rotating block (6) is installed, and the round tube to be bent passes through the clearance hole (102); and base plates (101) for connecting anchor bolts are respectively provided at both ends of the bottom of the frame (1).

7. The round tube bending equipment according to claim 6, characterized in that: The support rotating block (6) is installed between the wing plates of the column channel steel through a pin shaft (7); the support rotating block (6) adopts a prism shape, and arc grooves (601) of different diameters are provided on the edges to be suitable for round tubes of different specifications.

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