bending machine

Abstract

The present application relates to the technical field of machining, in particular to a pipe bending machine; the pipe bending machine comprises a bending device and a bending die; the bending device comprises a pipe mouth clamping mechanism, a fixing mechanism and a mandrel; the mandrel is assembled to the fixing mechanism, and the mandrel can be inserted and matched with a pipe to be bent; the pipe mouth clamping mechanism is slidingly matched with the fixing mechanism, and is used for clamping the pipe mouth end of the pipe inserted and matched with the mandrel; the bending device is configured to rotate around the bending center of the bending die, so that the pipe inserted and matched with the mandrel is bent, and the bending device has an initial position and a bending position; wherein, during the rotation of the bending device around the bending center from the initial position to the bending position, the pipe mouth clamping mechanism and the fixing mechanism have a relative sliding trend, so that the distance between the pipe mouth clamping mechanism and the fixing mechanism is increased. The pipe bending machine can improve the problem that the pipe mouth of the bent pipe is formed with an inclined mouth, and is beneficial to make the bent pipe meet the process requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, in particular to a pipe bender. BACKGROUND

[0002] The pipe bender is mainly used for pipe processing in air conditioners, boilers, furniture, power construction and the like. The pipe bender provided by the related art is mainly used for cutting with chips, and the pipe is cut after being bent into a U shape. This cutting mode causes material waste, generates a large amount of chips, is difficult to clean, and causes potential harm to the human body. In order to solve the above problems, the pipe bender provided by the related art is used for cutting small U-shaped pipes without chips, and the pipe is cut into a straight pipe with a length of a small U-shaped pipe, and then the cut pipe is bent into a small U-shaped pipe.

[0003] However, the cutting and bending mode easily causes the pipe opening to form an inclined opening, and thus it is difficult to meet the process requirements. SUMMARY

[0004] The present application solves the problem of improving the problem that the pipe opening of the bent pipe forms an inclined opening, and is beneficial to making the bent pipe meet the process requirements.

[0005] In order to solve the above problems, the present application provides a pipe bender, which comprises:

[0006] The bending device comprises a pipe opening clamping mechanism, a fixing mechanism and a mandrel, the mandrel is assembled to the fixing mechanism, and the mandrel can be inserted and connected with the pipe to be bent; the pipe opening clamping mechanism is in sliding connection with the fixing mechanism, and is used for clamping the pipe opening end of the pipe inserted and connected with the mandrel;

[0007] The bending device is configured to rotate around the bending center of the bending die, so that the pipe inserted and connected with the mandrel is bent, and the bending device has an initial position and a bending position; wherein,

[0008] During the rotation of the bending device around the bending center from the initial position to the bending position, the pipe opening clamping mechanism and the fixing mechanism have a relative sliding trend, so that the distance between the two is increased.

[0009] When the pipe bender is used to bend the pipe, the pipe opening clamping mechanism of the bending device clamps the pipe opening end of the pipe, and during the rotation of the bending device to the bending position to bend the pipe around the bending die, the pipe opening clamping mechanism and the fixing mechanism produce relative sliding, so that the distance between the two is increased, that is, the pipe opening clamping mechanism can move synchronously with the movement of the pipe opening end when clamping the pipe opening end of the pipe, and thus the position and shape of the pipe opening end of the pipe can be fixed by the pipe opening clamping mechanism, the problem that the pipe opening is easily formed into an inclined opening is improved, and the bent pipe can meet the process requirements.

[0010] In an optional embodiment, the pipe mouth clamping mechanism comprises a follower support die and a pipe mouth clamping assembly, the pipe mouth clamping assembly is assembled to the follower support die, the follower support die is in sliding fit with the fixing mechanism, the pipe mouth clamping assembly is used for clamping the pipe mouth end of the pipe inserted with the mandrel, and the pipe mouth clamping assembly can slide relative to the fixing mechanism synchronously with the follower support die.

[0011] Assembling the pipe mouth clamping assembly to the follower support die can ensure compactness and easy assembly of the structure.

[0012] In an optional embodiment, the pipe bending machine further comprises an elastic member, the elastic member is arranged between the fixing mechanism and the pipe mouth clamping mechanism; when the bending device rotates to the bending position, the elastic member can make the pipe mouth clamping mechanism have a tendency to move close to the fixing mechanism.

[0013] Arranging the elastic member between the fixing mechanism and the pipe mouth clamping mechanism can make the pipe mouth clamping mechanism slide to the direction close to the fixing mechanism through the elastic action of the elastic member when the pipe is bent and formed and the pipe mouth clamping mechanism no longer clamps the pipe mouth end of the pipe, so as to facilitate resetting and subsequent pipe bending demolding.

[0014] In an optional embodiment, the pipe bending machine further comprises a pipe clamping mechanism; when the bending device is located at the bending position, the pipe clamping mechanism can be used in cooperation with the bending die to clamp the bent pipe.

[0015] Clamping the bent pipe by using the pipe clamping mechanism and the bending die can facilitate subsequent cutting and separation work.

[0016] In an optional embodiment, the pipe clamping mechanism comprises a clamping block, the clamping block has a circular arc concave surface, and the circular arc concave surface can be used to clamp the bent pipe together with the bending die.

[0017] Clamping the bent pipe by using the clamping block with the circular arc concave surface and the bending die can facilitate ensuring stability of clamping and facilitating subsequent cutting and separation work.

[0018] In an optional embodiment, the pipe bending machine further comprises a rack and a cutting device, the cutting device and the bending die are arranged in the rack, and the cutting device is used to cut the bent pipe to form a cutting mark on the pipe.

[0019] The pipe bending machine is provided with the cutting device, which facilitates cutting after the pipe is bent, and is conducive to ensuring flatness of the pipe mouth formed by cutting, so that the bent pipe processed can meet the requirements.

[0020] In an optional embodiment, the cutting device comprises an inner hob and an adjusting mechanism, the adjusting mechanism is arranged in the rack, the adjusting mechanism is in transmission fit with the inner hob, and the adjusting mechanism is used to adjust the position of the inner hob in cutting the pipe.

[0021] By adjusting the position of the inner roller cutter using an adjustment mechanism, bends of different sizes can be cut to meet various requirements.

[0022] In an optional embodiment, the pipe bending machine further includes a breaking device that is driven in conjunction with the pipe bending clamping mechanism to drive the pipe bending clamping mechanism and the bending die to move synchronously and cause the pipe to break or separate from the cut.

[0023] When cutting a bent pipe using a cutting device, only a cut mark can be made on the pipe without cutting it completely. Then, a pulling device can be used to drive the bending clamping mechanism and the bending die to move synchronously, causing the pipe to break or separate from the cut mark, thus completing the cutting of the pipe. The pulling method can make the pipe end formed by the pipe smoother, which helps to reduce the shrinkage.

[0024] In an optional embodiment, the pipe bending machine further includes a pipe clamping device, which is disposed on the frame of the pipe bending machine and is used to clamp and position the pipe to be bent.

[0025] By clamping the pipe fittings with a pipe clamping device, the stability of the pipe fittings can be ensured when they are bent, thereby ensuring the yield of the bent pipe fittings.

[0026] In an optional embodiment, the pipe bending machine further includes a discharge device disposed on the frame of the pipe bending machine, which is used to remove the bent pipe from the bending die.

[0027] The unloading device allows for easy removal of the processed bent pipe, ensuring high efficiency in pipe bending. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a beveled opening formed at the end of a bent pipe in a related technology.

[0029] Figure 2 This is a schematic diagram of the pipe bending machine when the bending device is in the initial position in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the pipe bending machine when the bending device rotates from the initial position to the bending position in an embodiment of the present invention;

[0031] Figure 4 for Figure 3 Enlarged view of section IV;

[0032] Figure 5 This is a schematic diagram of the pipe bending machine when the bending device is in the bending position according to an embodiment of the present invention;

[0033] Figure 6This is a schematic diagram of the pipe bending machine when the unloading needle removes the pipe from the bending die in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of a pipe bending machine when the pipe is broken off from the knife mark by the breaking device in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram illustrating the formation of a constriction at the end of a bend in a pipe in a related technology.

[0036] Explanation of reference numerals in the attached figures:

[0037] 010-Pipe bending machine; 100-Frame; 200-Bending device; 210-Pipe clamping mechanism; 211-Follow-up mold; 212-Pipe clamping assembly; 213-Second drive component; 214-Upper mold; 215-Lower mold; 220-Fixing mechanism; 221-First plate; 222-Second plate; 223-Receiving groove; 230-Mandrel; 231-Spherical component; 240-Elastic component; 300-Bending die; 301-Bending center; 310-Bending block; 311-Circular arc convex surface; 320-Assembly; 400-Pipe bending clamping mechanism; 410-Clamping block; 411 - Concave surface; 420- Third driving component; 500- Cutting device; 510- Inner hob; 520- Adjusting mechanism; 521- Assembly block; 522- Adjusting cylinder; 523- Piston rod; 524- Nut; 600- Pull-off device; 610- Fourth driving component; 620- Base; 700- Pipe clamping device; 710- First driving component; 720- Upper die; 721- Through hole; 730- Lower die; 800- Unloading pin; a- First direction; b- Second direction; 900- Pipe; 901- Pipe end; 902- Beveled opening; 903- Narrowing opening; 910- Bend. Detailed Implementation

[0038] The pipe bending machine provided by related technologies is designed to solve the problem of material waste and human injury caused by generating a large amount of debris when bending the pipe before cutting. However, this type of pipe bending machine easily leads to the formation of a beveled edge (902) at the pipe end (e.g., ...). Figure 1 (as shown), which makes it difficult to meet process requirements.

[0039] The pipe bending machine provided in this embodiment can improve the problem of beveled openings at the pipe ends after bending, which helps to ensure that the processed pipe bends meet the process requirements.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Please refer to Figures 2-5The pipe bending machine 010 provided in this embodiment includes a bending device 200 and a bending die 300. The bending device 200 includes a pipe end clamping mechanism 210, a fixing mechanism 220, and a mandrel 230. The mandrel 230 is assembled to the fixing mechanism 220 and can be inserted into the pipe fitting 900 to be bent. The pipe end clamping mechanism 210 is slidably engaged with the fixing mechanism 220 and is used to clamp the pipe end 901 of the pipe fitting 900 that is inserted into the mandrel 230. The bending device 200 is configured to rotate around the bending center 301 of the bending die 300 so that the pipe fitting 900 inserted into the mandrel 230 is bent. The bending device 200 has an initial position and a bending position. During the process of the bending device 200 rotating from the initial position to the bending position around the bending center 301, the pipe end clamping mechanism 210 and the fixing mechanism 220 have relative sliding drive to increase the distance between them.

[0042] When bending pipe fitting 900 using pipe bending machine 010, the pipe end clamping mechanism 210 of bending device 200 clamps the pipe end 901 of pipe fitting 900. During the process of bending device 200 rotating towards the bending position to bend pipe fitting 900 around bending die 300, relative sliding occurs between pipe end clamping mechanism 210 and fixing mechanism 220, increasing the distance between them. This ensures that pipe end clamping mechanism 210 moves synchronously with the movement of pipe end 901 when clamping pipe fitting 900. In this way, the position and shape of pipe end 901 of pipe fitting 900 can be fixed by pipe end clamping mechanism 210, improving the problem of easy formation of oblique opening at the pipe end. Moreover, the oblique opening can be controlled within 0.5mm, which is conducive to ensuring that the processed bent pipe 910 meets the process requirements.

[0043] The pipe bending machine 010 includes a frame 100, and a bending die 300 is set on the frame 100. The bending die 300 can be fixedly set on the frame 100 or detachably set on the frame 100.

[0044] Further, please refer to Figure 6 The bending die 300 includes a bending block 310, which is disposed on the frame 100. The bending block 310 is provided with an arcuate convex surface 311, the center of which is the bending center 301. The pipe clamping mechanism 210 can clamp the pipe 900 and rotate it synchronously around the bending block 310, and the pipe 900 can form a bent pipe 910 around the arcuate convex surface 311.

[0045] Furthermore, the bending die 300 also includes an assembly 320, the bending block 310 is connected to the assembly 320, and the assembly 320 is disposed on the frame 100, that is, the bending block 310 is disposed on the frame 100 through the assembly 320.

[0046] To ensure the pipe fitting 900 to be bent is stably positioned on the pipe bending machine 010, please refer to...Figure 2 , Figure 3 , Figure 5 and Figure 6 To ensure the reliability and smooth progress of the bending operation, the pipe bending machine 010 in this embodiment also includes a pipe clamping device 700, which is disposed on the frame 100 and is used to clamp and position the pipe 900 to be bent.

[0047] It should be noted that in this embodiment, when the pipe bending machine 010 processes the bent pipe 910, it adopts a method of bending first and then cutting. The pipe 900 is relatively long before cutting. The mandrel 230 is inserted into the end of the pipe 900 that needs to be bent, and the end of the pipe 900 away from the mandrel 230 can be clamped by the pipe clamping device 700. This makes the position of the pipe 900 on the pipe bending machine 010 relatively stable, thereby ensuring that the pipe 900 is not prone to shaking when it is bent, and ensuring the success rate of processing.

[0048] It should also be noted that the above-mentioned pipe clamping device 700 is used to clamp and position the pipe 900 to be bent, which means that the pipe clamping device 700 clamps the part of the pipe 900 that does not need to be bent and fixes the position of that part relative to the frame 100.

[0049] The structure of the pipe clamping device 700 can be selected as needed. In this embodiment, the pipe clamping device 700 includes a first driving member 710, an upper mold 720, and a lower mold 730. The upper mold 720 is fixedly mounted on the frame 100. The first driving member 710 is mounted on the frame 100 and is in transmission cooperation with the lower mold 730 to drive the lower mold 730 to move closer to or away from the upper mold 720. When the pipe 900 is positioned between the upper mold 720 and the lower mold 730, and the first driving member 710 drives the lower mold 730 to move closer to the upper mold 720, the upper mold 720 and the lower mold 730 can reliably clamp and position the pipe 900. When the first driving member 710 drives the lower mold 730 away from the upper mold 720, the pipe 900 can be removed from between the upper mold 720 and the lower mold 730.

[0050] The first driving component 710 includes, but is not limited to, a cylinder, a hydraulic cylinder, or an electric push rod; the first driving component 710 is disposed on the frame 100 in a manner including, but not limited to, snap-fitting or connecting with fasteners such as bolts.

[0051] It should be noted that the upper mold 720 is set on the frame 100 in ways including but not limited to welding, snap-fitting, or connection with fasteners such as bolts; the lower mold 730 is connected to the first drive component 710 in ways including but not limited to plugging, snap-fitting, or connection with fasteners such as bolts.

[0052] In order to efficiently remove the prepared bent pipe 910 after processing, the pipe bending machine 010 of this embodiment also includes an unloading device, which is provided on the frame 100 and is used to remove the bent pipe 910 from the bending die 300.

[0053] Further, please refer to Figure 6 The unloading device includes an unloading pin 800, which is movably mounted on the frame 100 and is used to push the bent tube 910 off the bending die 300.

[0054] Furthermore, the ejector pin 800 is movably inserted into the upper die 720, that is, the ejector pin 800 is set on the frame 100 through the upper die 720, and the ejector pin 800 can slide along its own length extension direction to push the bent tube 910 off the bending die 300.

[0055] It should be noted that after the bending pipe 910 is processed, the worker can manually slide the unloading pin 800 to push the bending pipe 910 off the bending die 300.

[0056] Optionally, the upper mold 720 is provided with a groove or through hole 721 for slidably inserting the ejector pin 800; by providing the groove or through hole 721, the stability and reliability of the ejector pin 800 being slidably disposed on the upper mold 720 can be ensured, thereby ensuring the reliability of removing the bend 910 using the ejector pin 800.

[0057] It should be understood that in other embodiments, the pipe bending machine 010 also includes a driving component disposed on the frame 100, and the driving component is pulsatorically connected to the unloading needle 800, for driving the unloading needle 800 to move along its own length direction, so as to use the driving component to drive the unloading needle 800 to remove the bent pipe 910 from the bending die 300. The driving component includes, but is not limited to, cylinders, hydraulic cylinders, electric push rods, etc.

[0058] Please refer to Figure 2 , Figure 3 and Figure 5The pipe clamping mechanism 210 of this embodiment includes a follower mold 211 and a pipe clamping assembly 212. The pipe clamping assembly 212 is assembled on the follower mold 211, and the follower mold 211 is slidably engaged with the fixing mechanism 220. The pipe clamping assembly 212 is used to clamp the pipe end 901 of the pipe fitting 900 that is inserted into the mandrel 230, and the pipe clamping assembly 212 can slide synchronously with the follower mold 211 relative to the fixing mechanism 220. By assembling the pipe clamping assembly 212 on the follower mold 211, the pipe clamping assembly 212 can be assembled into an integral assembly, and then the follower mold 211 can be rotatably engaged with the fixing mechanism 220. This allows the pipe clamping mechanism 210 to be modularly assembled as a whole, which helps to ensure the compactness and ease of assembly of the structure. Of course, in other embodiments, the follower mold 211 can be assembled with the fixing mechanism 220, and then the pipe clamping assembly 212 can be assembled with the follower mold 211.

[0059] The pipe end clamping assembly 212 can be selected as needed; in this embodiment, the pipe end clamping assembly 212 includes a second driving member 213, an upper clamping mold 214, and a lower clamping mold 215; the upper clamping mold 214 and the second driving member 213 are both disposed on the follower mold 211, and the second driving member 213 is in a transmission cooperation with the lower clamping mold 215 to drive the lower clamping mold 215 to approach or move away from the upper clamping mold 214; when the pipe end of the pipe 900 is placed between the upper clamping mold 214 and the lower clamping mold 215, and the second driving member 213 drives the lower clamping mold 215 to approach the upper clamping mold 214, the upper clamping mold 214 and the lower clamping mold 215 can jointly clamp the pipe end 901 of the pipe 900; when the second driving member 213 drives the lower clamping mold 215 away from the upper clamping mold 214, the pipe end 901 of the pipe 900 can be removed from between the lower clamping mold 215 and the upper clamping mold 214.

[0060] The second driving component 213 includes, but is not limited to, a cylinder, a hydraulic cylinder, or an electric push rod; the second driving component 213 is disposed on the follower mold 211 in a manner including, but not limited to, snap-fitting or connecting with fasteners such as bolts.

[0061] It should be noted that the upper clamping mold 214 is set on the follower mold 211 in ways including but not limited to welding, snap-fitting, or connection with fasteners such as bolts; the lower clamping mold 215 is connected to the second driving component 213 in ways including but not limited to plugging, snap-fitting, or connection with fasteners such as bolts.

[0062] The structure of the fixing mechanism 220 can be selected as needed; please refer to [reference needed]. Figure 2 , Figure 3 and Figure 5The fixing mechanism 220 in this embodiment includes a first plate 221 and a second plate 222, with the first plate 221 connected to the second plate 222. One end of the mandrel 230 is connected to the first plate 221, and the other end can be inserted into the pipe fitting 900 from one end of the pipe fitting 900. The follower mold 211 is slidably engaged with the second plate 222. With this configuration, when the bending device 200 rotates to the bending position, it can ensure that the pipe fitting 900 reliably rotates around the bending center 301 under the combined action of the pipe end clamping assembly 212 and the mandrel 230 to form a bent pipe 910. It can also ensure that the pipe end clamping assembly 212 can always reliably clamp and fix the pipe end 901 of the pipe fitting 900, thereby reliably improving the problem of the pipe end 901 forming a bevel.

[0063] Optionally, to enable the bending device 200 to rotate around the bending center 301 towards the bending position, the pipe bending machine 010 may further include a drive device (not shown in the figure); the drive device is in transmission cooperation with at least one of the first plate 221 and the second plate 222, and is used to drive the fixing mechanism 220 and the mandrel 230 to rotate synchronously around the bending center 301 towards the bending position. While the drive device drives the fixing mechanism 220 to rotate around the bending center 301, the pipe end clamping mechanism 210 can also rotate synchronously around the bending center 301 with the fixing mechanism 220. Since the pipe end clamping mechanism 210 and the fixing mechanism 220 are in sliding cooperation, a relative displacement occurs between the pipe end clamping mechanism 210 and the fixing mechanism 220 that clamp the pipe end 901 of the pipe 900 during the gradual bending process of the pipe 900. This ensures that the pipe end clamping mechanism 210 reliably clamps and positions the pipe end 901, thus improving the problem of the pipe end forming a bevel.

[0064] The structure of the drive device is similar to that of the drive device in the pipe bending machine 010 provided in related technologies, which bends the pipe 900. The drive device only needs to be able to drive the bending device 200 to rotate around the bending center 301. For example, the drive device includes a motor and a swinging component. The output shaft of the motor is connected to the swinging component for driving it to rotate around the bending center 301. The swinging component is fixedly connected to at least one of the first plate 221 and the second plate 222 so that when the swinging component rotates around the bending center 301, it drives the fixing mechanism 220 to rotate synchronously around the bending center 301. The swinging component includes, but is not limited to, a rocker arm or an eccentric wheel.

[0065] Of course, in other embodiments, the driving device may include an arc rack, a gear and a motor. The arc rack is fixedly mounted on the frame 100, and the center of the arc rack coincides with the bending center 301. The motor is fixedly connected to at least one of the first plate 221 and the second plate 222, and the output shaft of the motor is connected to the gear transmission. The gear meshes with the arc rack transmission. The motor drives the gear to rotate so that the gear moves along the length extension direction of the rack, thereby driving the fixing mechanism 220 to rotate synchronously around the bending center 301.

[0066] In other embodiments, the fixing component can also be manually rotated around the bending center 301 by a worker.

[0067] As the pipe end 901 of the fitting 900 is clamped by the pipe clamping assembly 212 and the bending device 200 rotates around the bending center 301 toward the bending position, the end of the mandrel 230 away from the first plate 221 continuously slides out of the pipe end of the fitting 900, so as to ensure that the fitting 900 can reliably form a bent pipe 910 around the bending block 310.

[0068] Please refer to Figure 2 In order to ensure that the part of the mandrel 230 inserted into the tube 900 can move the tube 900 smoothly, a spherical part 231 is connected to the end of the mandrel 230 away from the first plate 221, so as to ensure the smooth movement of the mandrel 230 in the tube 900 by utilizing the spherical outer surface of the spherical part 231.

[0069] Furthermore, the diameter of the spherical part 231 is equal to or approximately equal to the diameter of the mandrel 230.

[0070] The connection methods between the spherical part 231 and the spindle 230 include, but are not limited to, welding, or connection with fasteners such as screws.

[0071] It should be understood that in other embodiments, the end of the mandrel 230 away from the first plate 221 may be configured as an arc end.

[0072] The sliding connection between the follower mold 211 and the second plate 222 can be selected as needed. For example, one of the follower mold 211 and the second plate 222 may be provided with a sliding groove, and the other may be provided with a slider, with the slider slidingly engaging with the sliding groove; or, one of the follower mold 211 and the second plate 222 may be provided with a moving slide rail, and the other may be provided with a fixed slide rail, with the fixed slide rail slidingly engaging with the moving slide rail, etc. No specific limitation is made here.

[0073] It should be understood that in other embodiments, the follower mold 211 may not be provided, the second drive member 213 may be directly slidably connected to the second plate 222, and the upper clamping mold 214 may be slidably connected to the second plate 222.

[0074] Please refer to Figure 2 , Figure 3 and Figure 5The pipe bending machine 010 of this embodiment also includes an elastic element 240, which is disposed between the fixing mechanism 220 and the pipe end clamping mechanism 210. When the bending device 200 rotates to the bending position, the elastic element 240 can cause the pipe end clamping mechanism 210 to tend to move closer to the fixing mechanism 220. The elastic element 240 includes, but is not limited to, a tension spring. By providing the elastic element 240 between the fixing mechanism 220 and the pipe end clamping mechanism 210, when the pipe 900 is bent and the pipe end clamping mechanism 210 no longer clamps the pipe end 901 of the pipe 900, the elastic element 240 can cause the pipe end clamping mechanism 210 to slide closer to the fixing mechanism 220, so as to complete the reset and subsequent demolding of the bent pipe 910.

[0075] Optionally, the second plate 222 has a receiving groove 223, one end of the elastic member 240 extends into the receiving groove 223 and is connected to the second plate 222, and the other end of the elastic member 240 is connected to the follower mold 211. This arrangement helps to ensure that the elastic member 240 is reliably positioned between the fixing mechanism 220 and the pipe clamping mechanism 210.

[0076] It should be noted that during the rotation of the bending device 200 around the bending center 301 towards the bending position, because the pipe clamping assembly 212 clamps the pipe end 901 of the pipe fitting 900, the pipe clamping assembly 212 and the follower mold 211 can move synchronously with the clamped pipe end 901. The follower mold 211 slides with the fixing mechanism 220, and the distance between the pipe clamping mechanism 210 and the fixing mechanism 220 gradually increases, causing the elastic element 240 to gradually lengthen. Please refer to... Figure 5 When the bending device 200 rotates to the bending position, the bending device 200 can rotate about 180° around the bending die 300, and the elastic element 240 is stretched to its longest length. At this time, the upper clamping die 214 and the lower clamping die 215 are separated, and the tube clamping mechanism 210 can slide towards the fixing mechanism 220 under the elastic action of the elastic element 240, thus completing the reset of the tube clamping mechanism 210.

[0077] It should also be noted that when the pipe clamping mechanism 210 slides toward the fixing mechanism 220 under the elastic action of the elastic member 240, the mandrel 230 can remain inserted in the pipe fitting 900, that is, the mandrel 230 can be configured not to move synchronously with the pipe clamping mechanism 210; after the pipe clamping mechanism 210 has completed its reset, the bending device 200 can be moved as a whole along the first direction a, so that the mandrel 230 can be pulled out from the pipe fitting 900.

[0078] Furthermore, the pipe bending machine 010 may also include a linear drive mechanism (not shown) disposed on the frame 100. The linear drive mechanism is capable of being connected to the bending device 200 rotated to the bending position, and is used to drive the bending device 200 to move along the first direction a so that the mandrel 230 is pulled out from the pipe fitting 900. The linear drive assembly includes, but is not limited to, electric push rods and cylinders.

[0079] Optionally, in order to enable the bending device 200 to smoothly rotate around the bending center 301 to the bending position under the drive of the driving device, and for the bending device 200 in the bending position to smoothly move along the first direction a under the drive of the linear drive mechanism, the bending device 200 is transmissionally connected to the driving device, and the driving device is transmissionally connected to the linear drive mechanism. For example, the motor of the driving device is transmissionally connected to the linear drive mechanism, the motor drives the oscillating member to rotate the bending device 200 around the bending center 301 to the bending position, and the linear drive mechanism drives the motor to move the bending device 200 located in the bending position along the first direction a. When 200 is in the initial position, the linear drive mechanism drives the bending device 200 in the initial position to move along the first direction a, so that the mandrel 230 can be inserted into the pipe fitting 900; or, the bending device 200 can be detachably connected to the drive device and the linear drive mechanism, that is, when the bending device 200 needs to rotate around the bending center 301, the bending device 200 is connected to the drive device in a transmission manner, and when the bending device 200 in the bending position needs to move along the first direction a, the bending device 200 is separated from the drive device and connected to the linear drive mechanism in a transmission manner. The above-mentioned detachable connection methods include but are not limited to snap-fit ​​or plug-in.

[0080] Of course, in other embodiments, the mandrel 230 can be slidably inserted into the first plate 221; by simply sliding the mandrel 230 relative to the first plate 221 along the first direction a, the mandrel 230 can be pulled out from the tube 900. In addition, the bending device 200 may also include a linear drive assembly disposed on the first plate 221, which is connected to the mandrel 230 for driving the mandrel 230 to slide along the first direction a, so that the mandrel 230 is pulled out from the tube 900; moreover, when the tube 900 to be bent is placed on the tube bending machine 010, the linear drive assembly can also be used to drive the mandrel 230 to slide along the first direction a to insert it into the tube 900.

[0081] Please continue to refer to Figure 2 , Figure 3 and Figure 5The pipe bending machine 010 of this embodiment also includes a pipe bending clamping mechanism 400. When the bending device 200 is in the bending position, the pipe bending clamping mechanism 400 can cooperate with the bending die 300 to jointly clamp the bent pipe 900. Specifically, after the pipe 900 is bent into a pipe 910 around the bending die 300, the pipe bending clamping mechanism 400 and the bending die 300 can jointly clamp the bent portion of the pipe 910 that surrounds the bending block 310. By using the pipe bending clamping mechanism 400 and the bending die 300 to clamp the bent pipe 910, subsequent cutting and separation work can be easily carried out.

[0082] The pipe bending clamping mechanism 400 includes a clamping block 410 and a third driving member 420. The third driving member 420 is disposed on the frame 100 and is connected to the clamping block 410 for transmission. It is used to drive the clamping block 410 to approach or move away from the bending die 300. The third driving member 420 includes, but is not limited to, a cylinder, a hydraulic cylinder, an electric push rod, etc. When the third driving member 420 drives the clamping block 410 to approach the bending die 300, the clamping block 410 and the bending die 300 can jointly clamp the bent pipe 910 formed around the outer periphery of the bending block 310. When the third driving member 420 drives the clamping block 410 to move away from the bending die 300, the clamping block 410 and the bending die 300 no longer clamp the bent pipe 910, and the bent pipe 910 can be removed from the bending die 300.

[0083] Furthermore, the clamping block 410 has a concave arc surface 411, which can be used to clamp the bent pipe 900 together with the bending die 300. By clamping the bent pipe 910 together with the bending die 300 using the clamping block 410 with the concave arc surface 411, it is beneficial to ensure the stability of the clamping, thereby facilitating the subsequent cutting and separation work.

[0084] It should be noted that when the concave surface 411 is located in the position where it and the bending die 300 jointly clamp the bent tube 910, the center of the concave surface 411 coincides with the bending center 301. In this way, the concave surface 411 can reliably abut against the outside of the bent tube 910, thereby ensuring that the bent tube 910 is stably and reliably clamped.

[0085] Please refer to Figure 2 and Figure 5The pipe bending machine 010 of this embodiment also includes a cutting device 500, which is disposed on the frame 100 and used to cut the bent pipe fitting 900 to form knife marks on the pipe fitting 900. The cutting device 500 in the pipe bending machine 010 facilitates cutting after the pipe fitting 900 is bent, which helps ensure the flatness of the cut end and thus ensures that the processed bent pipe 910 meets the requirements. The pipe bending machine 010 adopts a bending-then-cutting processing method, which also reduces the amount of debris generated from cutting the pipe fitting 900 falling into the bending device 200 and other structures. This ensures that the pipe fitting 900 can be reliably placed in the bending device 200 for bending and also ensures that the pipe bending machine 010 is easy to maintain.

[0086] The cutting device 500 includes an inner roller cutter 510 and an adjusting mechanism 520. The adjusting mechanism 520 is mounted on the frame 100 and is in drive cooperation with the inner roller cutter 510 to adjust the position of the inner roller cutter 510 during pipe cutting 900. By adjusting the position of the inner roller cutter 510 through the adjusting mechanism 520, bends 910 of different sizes can be cut to meet various requirements.

[0087] Adjustment mechanism 520 can be selected as needed; please refer to [reference needed]. Figure 2 In this embodiment, the adjusting mechanism 520 includes an assembly block 521 and an adjusting cylinder 522. The inner hob 510 is mounted on the assembly block 521, and the adjusting cylinder 522 is connected to the assembly block 521 in a transmission manner. That is, the inner hob 510 is in transmission cooperation with the adjusting cylinder 522 through the assembly block 521. Specifically, the piston rod 523 of the adjusting cylinder 522 is connected to the assembly block 521. When the piston rod 523 extends to different lengths, the positions of the assembly block 521 and the inner hob 510 can be adjusted, thereby allowing the inner hob 510 to cut at different positions on the pipe fitting 900 to obtain bent pipes 910 of different sizes. The assembly block 521 ensures that the operation of the inner hob 510 and the adjusting cylinder 522 will not interfere with each other.

[0088] Furthermore, a nut 524 is threaded onto the end of the piston rod 523 away from the assembly block 521. By rotating the nut 524, the piston rod 523 can be moved along its own length direction, thereby adjusting the length of the end of the piston rod 523 connected to the assembly block 521 extending out of the housing of the adjusting cylinder 522. This allows the position of the inner hob 510 to be adjusted, enabling the inner hob 510 to cut at different positions on the pipe fitting 900. The adjustment range of the inner hob 510 at the cutting position on the pipe fitting 900 can be approximately ±5mm.

[0089] It should be noted that the connection methods between the assembly block 521 and the piston rod 523 of the regulating cylinder 522 include, but are not limited to, snap-fit, threaded connection, welding, etc.

[0090] It should be understood that in other embodiments, the adjustment mechanism 520 may also include linear drive mechanisms such as electric push rods, which are not specifically limited here.

[0091] When the pipe fitting 900 is bent to form a bend 910, and the bend clamping mechanism 400 and the bending die 300 jointly clamp the bend 910, the inner hob 510 rotates eccentrically around the outer periphery of the pipe fitting 900, while increasing the eccentricity to 0.2mm, which can form a circle of knife marks on the pipe fitting 900 without cutting the pipe fitting 900. Afterwards, the pipe fitting 900 can be pulled off from the knife mark to separate the bend 910 from the unbent part of the pipe fitting 900.

[0092] To facilitate the breaking of the 900mm pipe fitting with cut marks, please refer to... Figure 5 and Figure 7 The pipe bending machine 010 also includes a break-off device 600, which is driven by the pipe bending clamping mechanism 400 to drive the pipe bending clamping mechanism 400 and the bending die 300 to move synchronously and break the pipe fitting 900 at the cut. Breaking the pipe fitting 900 by pulling it off results in a smoother pipe end, with the flatness ratio controlled within 5%, which helps reduce the narrowing of the neck 903 (e.g., ...). Figure 8 As shown in the figure, the shrinkage rate can be controlled within 4.5%.

[0093] It should be understood that in other embodiments, the inner roller cutter 510 can directly cut the pipe, and when the pulling device 600 drives the pipe bending clamping mechanism 400 and the bending die 300 to move synchronously, the pipe 900 can be separated from the cut mark.

[0094] To ensure that the pipe bending clamping mechanism 400 and the bending die 300 can reliably move relative to the frame 100 under the drive of the breaking device 600, so that the pipe fitting 900 with cut marks is broken; please refer to Figure 7 In this embodiment, both the pipe bending clamping mechanism 400 and the bending die 300 are slidably disposed on the frame 100. Specifically, both the fitting 320 and the third driving member 420 are rotatably disposed on the frame 100. When the breaking device 600 drives at least one of the fitting 320 and the third driving member 420 to slide relative to the frame 100 along the second direction b, the pipe 900 can be broken from the cut.

[0095] Furthermore, the breaking device 600 includes a fourth driving member 610 and a base 620. The third driving member 420 and the assembly 320 are both disposed on the base 620. The base 620 is slidably connected to the frame 100, that is, the third driving member 420 and the assembly 320 are slidably disposed on the frame 100 through the base 620. The slidable connection between the base 620 and the frame 100 includes, but is not limited to, a sliding connection through a slide groove or a sliding connection through a slide rail. The fourth driving member 610 is disposed on the frame 100 and is in transmission cooperation with the base 620. It is used to drive the base 620 to slide along the second direction b, which can drive the third driving member and the assembly 320 to slide synchronously relative to the frame 100 along the second direction b. That is, it drives the bending clamping mechanism 400 and the bending die 300 to slide synchronously relative to the frame 100 along the second direction b. The base 620 facilitates the reliable synchronous sliding of the pipe bending clamping mechanism 400 and the bending die 300 along the second direction b, thereby facilitating the reliable breaking of the pipe fitting 900.

[0096] It should be noted that the third drive component 420 and the assembly 320 are mounted on the base 620 by means including but not limited to snap-fitting, bolts, or other fasteners. The fourth drive component 610 includes, but is not limited to, cylinders, hydraulic cylinders, and electric push rods.

[0097] The working principle of the pipe bending machine 010 in this embodiment includes: placing the pipe fitting 900 on the pipe bending machine 010 and clamping the pipe fitting 900 by the pipe fitting clamping device 700; inserting the mandrel 230 into the pipe fitting 900, and clamping the pipe end 901 of the pipe fitting 900 by the pipe end clamping assembly 212; rotating the bending device 200 from the initial position around the bending center 301 to the bending position; clamping the bent pipe 910 by the cooperation of the pipe bending clamping mechanism 400 and the bending die 300; and using the inner hobbing cutter 510. Cutting marks are formed on the pipe fitting 900; the pipe end clamping assembly 212 releases the pipe fitting 900, and the pipe end clamping mechanism 210 approaches the fixing mechanism 220 under the action of the elastic element 240, and pulls the mandrel 230 out of the pipe fitting 900; then the pulling device 600 is used to make the bending clamping mechanism 400 and the bending die 300 move synchronously, so that the pipe fitting 900 is pulled off from the cut mark; the bending clamping mechanism 400 releases the bending pipe 910, and the unloading needle 800 removes the bending pipe 910 from the bending die 300.

[0098] In summary, the pipe bending machine 010 provided by the present invention can effectively improve the problem of the beveled opening at the pipe end of the bent pipe fitting 900, which is beneficial to making the processed bent pipe 910 meet the process requirements.

[0099] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A pipe bending machine, characterized in that, include: A bending device (200) includes a pipe end clamping mechanism (210), a fixing mechanism (220), and a mandrel (230). The mandrel (230) is assembled to the fixing mechanism (220) and can be inserted into the pipe fitting (900) to be bent. The pipe end clamping mechanism (210) includes a follower mold (211) and a pipe end clamping assembly (212). The pipe end clamping assembly (212) is assembled to the follower mold (211). The follower mold (211) is slidably engaged with the fixing mechanism (220). The pipe end clamping assembly (212) is used to clamp the pipe end (901) of the pipe fitting (900) that is inserted into the mandrel (230). The pipe end clamping assembly (212) can slide synchronously with the follower mold (211) relative to the fixing mechanism (220). A bending die (300) is provided, wherein the bending device (200) is configured to rotate about a bending center (301) of the bending die (300) to bend a pipe fitting (900) that is inserted into the mandrel (230), and the bending device (200) has an initial position and a bending position; wherein, As the bending device (200) rotates around the bending center (301) from the initial position to the bending position, the pipe clamping mechanism (210) and the fixing mechanism (220) have a relative sliding tendency to increase the distance between them. The pipe bending machine also includes an elastic element (240), which is disposed between the fixing mechanism (220) and the pipe clamping mechanism (210); when the bending device (200) rotates to the bending position, the elastic element (240) can cause the pipe clamping mechanism (210) to tend to move closer to the fixing mechanism (220).

2. The pipe bending machine according to claim 1, characterized in that, The pipe bending machine also includes a pipe bending clamping mechanism (400); when the bending device (200) is in the bending position, the pipe bending clamping mechanism (400) can be used to cooperate with the bending die (300) to jointly clamp the bent pipe (900).

3. The pipe bending machine according to claim 2, characterized in that, The pipe bending clamping mechanism (400) includes a clamping block (410) having an arc concave surface (411) which can be used together with the bending die (300) to clamp the bent pipe (900).

4. The pipe bending machine according to claim 2, characterized in that, The pipe bending machine also includes a frame (100) and a cutting device (500), both the cutting device (500) and the bending die (300) are disposed on the frame (100), and the cutting device (500) is used to cut the bent pipe (900) to form a cut mark on the pipe (900).

5. The pipe bending machine according to claim 4, characterized in that, The cutting device (500) includes an inner roller cutter (510) and an adjustment mechanism (520). The adjustment mechanism (520) is disposed on the frame (100). The adjustment mechanism (520) is in transmission cooperation with the inner roller cutter (510) and is used to adjust the position of the inner roller cutter (510) in the pipe (900) cutting.

6. The pipe bending machine according to claim 4, characterized in that, The pipe bending machine also includes a break-off device (600), which is in transmission cooperation with the pipe bending clamping mechanism (400) to drive the pipe bending clamping mechanism (400) and the bending die (300) to move synchronously and cause the pipe (900) to break or separate from the cut.

7. The pipe bending machine according to claim 1, characterized in that, The pipe bending machine also includes a pipe clamping device (700), which is disposed on the frame (100) of the pipe bending machine and is used to clamp and position the pipe (900) to be bent.

8. The pipe bending machine according to claim 1, characterized in that, The pipe bending machine also includes a discharge device, which is disposed on the frame (100) of the pipe bending machine. The discharge device is used to remove the bent pipe (910) from the bending die (300).

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