Pipe bending machine

Abstract

The utility model discloses a pipe bending machine which comprises a machine frame, a mold core capable of being arranged in a pipe fitting in a sleeved mode is arranged on the machine frame, a filling section is arranged at one end of the mold core, the cross section of the filling section is consistent with the cross section of the inner surface of the pipe fitting needing to be bent, and pipe bending devices are installed on the two sides of the filling section. The pipe bending device comprises a disc block capable of rotating, a clamping device capable of clamping a pipe fitting to be bent along rotation of the disc block is arranged behind the pipe bending device, and a limiting block capable of limiting the position of the pipe fitting on the mold core is arranged on the mold core. The pipe bending machine has the advantages that the yield of bent pipes is increased, and automation is improved.

Description

Technical Field

[0001] The utility model relates to the field of pipe bending and forming, in particular to a pipe bending machine. Background Art

[0002] A pipe bender is a device that bends parts of a straight pipe fitting at different angles to obtain the desired product. In the existing technology, a pipe bender usually includes a mold core that is sleeved inside the pipe fitting, a clamping device that clamps the pipe fitting at one end of the mold core, and a rotatable disc-shaped or arc-shaped pipe bending device behind the clamping device. The mold core is used to support the inside of the pipe fitting, and the clamping device clamps one side of the pipe fitting and rotates along the disc-shaped or arc-shaped arc surface to complete the pipe bending process. In actual production, the pipe fitting is sleeved on the mold core according to the position to be bent. Due to the long length of the mold core, the depth of the pipe fitting sleeved on the pipe fitting cannot be accurately measured, resulting in deviations in the clamping position of the pipe fitting by the clamping device, which in turn affects the shape of the pipe fitting after bending and affects the yield and quality of the produced bent pipes. At the same time, most of the current pipe benders can only be used for the bending of one type of pipe fitting, and it is difficult to be used for multiple types of pipe fittings. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a pipe bending machine which fixes the clamping position of pipe fittings so as to ensure the uniform shape of the pipe fittings after bending.

[0004] In order to solve the above technical problems, the utility model includes a frame, and its structural features are: the frame is provided with a mold core that can be inserted into the pipe fitting, one end of the mold core is provided with a filling section, the cross-section of the filling section is consistent with the cross-section of the inner surface of the pipe fitting that needs to be bent, and bending devices are installed on both sides of the filling section. The pipe bending device includes a rotatable disc block, and a clamping device that can clamp the pipe fitting and bend it along the rotation of the disc block is provided behind the pipe bending device. The mold core is provided with a limit block that can limit the position of the pipe fitting on the mold core.

[0005] After adopting the above structure, the bending pipe is put on the mold core, the inner diameter of the mold core is filled and supported by the filling section, the position of the pipe fitting on the mold core is limited by the limit block, and bending devices are provided on both sides of the filling section of the mold core. A clamping device is provided behind the bending device. The relative position of the clamping device and the mold core is fixed. When the position of the pipe fitting on the mold core is fixed, the clamping device clamps the position of the pipe fitting and the pipe fitting rotates along the arc surface of the disc block, so that the bending position of the pipe fitting is fixed, thereby ensuring the consistency of the shape of the pipe fitting after bending. At the same time, the filling section of the mold core fills the inside of the pipe fitting when bending the pipe, avoiding internal deformation caused by bending of the pipe fitting, and avoiding affecting the shape of the unbent part, thereby ensuring the yield rate of the pipe fitting.

[0006] The limit block includes an annular block mounted on the core, the diameter of the annular block is larger than the inner diameter of the pipe fitting, the annular block is provided with a locking device capable of locking the position of the limit block, the annular block can be locked and released by a locking method, the position of the annular block can be adjusted after locking and releasing, and then the position of the limit block can be adjusted, the diameter of the annular block is larger than the inner diameter of the pipe fitting, after the annular block is locked, the pipe fitting rests on the limit block, and the fixing between the limit block and the filling section of the core ensures that the bending positions of the same batch of pipe fittings are consistent, and at the same time, it can be adapted to different bending requirements after adjustment, thereby improving the applicability of the pipe bending machine.

[0007] The pipe bending device includes a disc block and a third clamping block located on the right side of the disc block, the third clamping block can move left and right to approach / move away from the disc block, the outer surface of the disc block is provided with an annular groove, the annular groove can fit the outer surface of the pipe fitting that needs to be bent, the end surface of the third clamping block close to the disc block is provided with a pipe bending groove in the same direction as the core, the annular groove and the pipe bending groove form a pipe bending space, the filling section of the core is located between the annular groove and the pipe bending groove, the annular groove can fit the outer surface of the pipe fitting, and the pipe fitting is bent along the rotation angle of the annular groove, the annular groove limits the upper and lower positions of the pipe fitting after bending, and avoids displacement of the pipe fitting in the upper and lower directions when the pipe fitting is bent, and at the same time the third clamping block and the core ensure the position of the unbent part of the pipe fitting, avoid displacement of the unbent part due to reaction force, and ensure the relative angle between the bent part and the unbent part of the pipe fitting, the filling section is located in the pipe bending space to fill the internal diameter, and ensure the stability of the shape of the unbent part.

[0008] The third clamping block can move along the axis direction of the mold core. When the clamping device clamps the pipe fitting and moves along the annular groove of the disc block, the bending groove of the third clamping block ensures that the pipe fitting bends along the annular groove after passing through the bending space. At the same time, as the pipe fitting moves, the third clamping block also moves along the direction of the mold core. Therefore, no relative friction occurs between the pipe fitting and the third clamping block. While ensuring the stability of the unbent part, friction scratches on the surface of the pipe fitting are avoided, thereby ensuring the quality of the pipe fitting.

[0009] The clamping device comprises a second frame which can rotate along the axis of the disc block, the second frame is provided with a first clamping block and a second clamping block which can move away from / close to the first clamping block, the first clamping block and the second clamping block are both provided with clamping grooves, and after the first clamping block and the second clamping block are attached, the two clamping grooves form a clamping space which can clamp the outer surface of the pipe fitting, the first clamping block is fixedly connected to the disc block, the clamping groove of the first clamping block is tangent to the annular groove of the disc block, and after the second clamping block approaches the first clamping block, the first clamping block and the second clamping block After fitting, the two clamping grooves merge to form a clamping space, and the clamping space fits the outer surface of the pipe fitting to clamp the pipe fitting. When the disc block rotates, the first clamping block and the second clamping block clamp the pipe fitting and rotate along with the disc block, and the second frame rotates along the axis of the disc block. When the pipe bending is completed, the second clamping block moves away from the first clamping block and no longer clamps the bent pipe. At this time, the disc block rotates in the opposite direction of the bent pipe and returns to the initial position. The clamping device returns to the initial position with the disc block, which is convenient for bending the next pipe fitting or the next position of the pipe fitting, thereby ensuring the stability of the clamping.

[0010] A driving device capable of driving the mold core to move along the axis is provided at one end of the mold core away from the disc block. The mold core is hinged to the driving device. When the first bending is completed, the driving device drives the mold core to move in the opposite direction toward the pipe bending device. At this time, the limit block pushes the pipe fitting to move. The position of the pipe fitting can be adjusted and the unbent part can be bent. The same pipe fitting can be bent multiple times, which reduces the manual adjustment process and improves the automation of the pipe bending machine.

[0011] In summary, the utility model has the advantages of improving the yield rate of bent pipes and improving automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 for Figure 1 Schematic diagram of the structure in the A direction. DETAILED DESCRIPTION

[0014] like Figure 1 , 2 As shown, the utility model is a pipe bending machine, which includes a frame 1, a mold core 2 and a pipe bending device 3 are installed on the frame 1, the pipe bending device 3 is located at one end of the mold core 2, and a limit block 5 is provided on the mold core 2 to fix the fitting position of the pipe on the mold core 2. For the convenience of description, Figure 1The left side is left, the right side is right, the upper side is front, and the lower side is back. The pipe bending device 3 includes a rotatable disc block 31, and a clamping device 4 is provided behind the disc block 31, which can clamp the pipe fitting and rotate along the disc block 31. By putting the pipe fitting to be bent on the core 2, the front end of the pipe of the part to be bent of the pipe fitting to be bent is placed in the clamping device 4, and the pipe fitting is clamped and fixed by the clamping device 4, so that the pipe fitting is driven to rotate along the outer edge of the disc block 31, thereby bending the pipe fitting. The distance of the pipe fitting on the core 2 is limited by the limit block 5, and the relative position of the clamping device 4 and the core 2 is fixed. When the position of the pipe fitting on the core 2 is fixed, the clamping device 4 clamps the position of the pipe fitting, and the part of the pipe fitting that rotates and bends along the arc surface of the disc block 31 is fixed, thereby ensuring that the shape of the pipe fitting after bending is consistent, and improving the quality of the finished product of the bent pipe. The stop block 5 includes an annular block mounted on the mold core 2, the diameter of the annular block is larger than the inner diameter of the pipe, and a locking device is provided on the annular block to lock the position of the stop block 5. When the locking device is released, the position of the stop block 5 can be adjusted to meet different pipe bending requirements, thereby improving the applicability of the pipe bending machine.

[0015] like Figure 1 , 2As shown, the clamping device 4 is located at the rear side of the pipe bending part, and the pipe bending device 3 includes a rotatable disc block 31. The clamping device 4 clamps one end of the pipe fitting, so that the pipe fitting located at the front side of the clamping device 4 is deformed with the rotation shape of the disc block 31, completing the pipe bending process. The axis of the disc block 31 is vertically arranged, and the outer surface of the axial outer side of the disc block 31 is provided with an annular groove 33. The cross-sectional shape of the annular groove 33 is the same as half the diameter of the pipe fitting to be bent. After the pipe fitting is clamped by the clamping device 4, the pipe fitting enters the annular groove 33 of the disc block 31, and the annular groove 33 plays a role of limiting, avoiding the displacement of the pipe fitting in the up and down directions when being bent, and avoiding the angle of the pipeline after bending. The rear end of the frame 1 is provided with a left and right track, and the track is located on the right side of the disc block 31. A third clamping block 32 seat that can move left and right along the track is provided on the track, and a third clamping block 32 seat that can move forward and backward is provided on the third clamping block 32 seat. The third clamping block 32 seat drives the third clamping block 32 to move to the left to fit the disc block 31. The left end face of the third clamping block 32 is provided with a pipe bending groove 34. The cross section of the pipe bending groove 34 is the same as half the diameter of the required complete pipe. When the third clamping block 32 moves to the leftmost side, the rear end of the third clamping block 32 fits with the disc block 31. When the pipe needs to be bent, the third clamping block 32 moves to the leftmost side, and a pipe bending space is formed between the pipe bending groove 34 and the annular groove 33 of the third clamping block 32. The pipe bending space fixes the pipe. When the disc block 31 rotates, the pipe bends along the annular groove 33 of the disc block 31. The pipe bending space ensures that the pipe fits the annular groove 33, thereby ensuring the bending process of the pipe. At the same time, the pipe bending groove 34 of the third clamping block 32 located at the front end of the pipe bending space cooperates with the mold core 2 to ensure the stability of the unbent part at the front end of the pipe bending section, and avoids skewing due to the reaction force of the bending. The mold core 2 supports the inner side of the pipe fitting, and the bend groove 34 fixes the right side of the outer surface of the pipe fitting, ensuring the stability of the pipe fitting and preventing the reaction force from causing the front section of the pipe fitting to deviate to the right or deform when the rear end pipe fitting is bent. At the same time, a driving device is provided at the front end of the third clamping block 32, and the driving device drives the third clamping block 32 to move in the front and rear directions. As the disc block 31 rotates clockwise, the third clamping block 32 moves backward to ensure that the relative position between the front part of the third clamping block 32 and the unbent part of the pipe fitting does not change. Then, the third clamping block 32 moves backward with the movement of the pipe fitting, while ensuring that the bend space fixes the bending process of the pipe fitting, avoiding friction between the pipe fitting and the third clamping block 32, avoiding damage to the surface of the pipe fitting caused by friction, and ensuring the quality of the pipe fitting.

[0016] like Figure 1 , 2As shown, the clamping device 4 includes a second frame 41 that can rotate along the axis of the disc block 31, and a first clamping block 42 and a second clamping block 43 that can move radially close to / away from the first clamping block 42 are provided on the second frame 41. A slide groove is also provided in the second frame 41, and a second clamping block 43 seat that can move along the slide groove of the second frame 41 is provided in the slide groove, and the second clamping block 43 seat is driven to approach / away from the first clamping block 42 by a driving device. A clamping groove 44 is provided on the right end surface of the first clamping block 42 and the left end surface of the second clamping block 43. The clamping grooves 44 of the first clamping block 42 and the second clamping block 43 are close to each other to form a clamping channel, and the clamping channel is in contact with the outer surface of the pipe fitting, and the pipe fitting can be clamped after being in contact. In this embodiment, when the pipe fitting is a round pipe, the cross-sections of the clamping grooves 44 of the first clamping block 42 and the clamping grooves 44 of the second clamping block 43 are both semicircular. In other embodiments, when the pipe is a square pipe, the cross-sections of the clamping groove 44 of the first clamping block 42 and the clamping groove 44 of the second clamping block 43 are also rectangular. The first clamping block 42 is fixed on the disc block 31, and the clamping groove 44 of the first clamping block 42 is tangent to the annular groove 33 of the disc block 31. After the clamping device 4 clamps the pipe, the pipe is fixed so that the part of the pipe located at the front side of the clamping device 4 is bent as the disc block 31 rotates, completing the pipe bending process. When the pipe bending process is completed, the second clamping block 43 moves radially away from the first clamping block 42, releases the pipe, the disc block 31 rotates counterclockwise, and the third clamping block 32 moves forward. At the same time, the second frame 41 is driven by the disc block 31 to rotate back to the rear side of the frame 1. At this time, the pipe can be taken out or the position of the pipe can be adjusted, and the remaining position of the pipe can be bent to complete the pipe bending process.

[0017] like Figure 1 , 2 As shown, the front end of the mold core 2 is provided with a driving device that can drive the mold core 2 to move forward and backward. The driving device can drive one end of the mold core 2 to move forward and backward. At the same time, the mold core 2 is hinged to the driving device, and the mold core can swing left and right along the intersection to facilitate the installation and removal of the pipe fitting. The mold core 2 moves back and forth, and a limit block 5 is installed on the mold core 2. The limit block 5 limits the installation position of the pipe fitting. After the first bending is completed, the driving device drives the mold core 2 to move in the opposite direction toward the pipe bending device 3. At this time, the limit block 5 pushes the pipe fitting to move, and the position of the pipe fitting can be adjusted and the unbent part can be bent. Then, the same pipe fitting can be bent multiple times, which reduces the manual adjustment process and improves the automation of the pipe bending machine.

[0018] like Figure 1 , 2As shown, in this embodiment, the disc block 31 and the third clamping block 32 are both provided with lifting ears, the third clamping block 32 is inserted into the third clamping block 32 seat, and the second clamping block 43 is inserted into the second clamping block 43 seat. The disc block 31, the first clamping block 42 fixed to the disc block 31, the second clamping block 43 and the third clamping block 32 can be replaced, and the bending radius can be adjusted by replacing the disc block 31, and the first clamping block 42, the second clamping block 43 and the third clamping block 32 can be applied to pipes of different shapes and diameters, thereby improving the applicability of the pipe bending machine.

Claims

1. A pipe bending machine, comprising a frame (1), characterized in that: The frame (1) is provided with a mold core (2) that can be inserted into a pipe fitting, a filling section is provided at one end of the mold core (2), the cross section of the filling section is consistent with the cross section of the inner surface of the pipe fitting to be bent, and pipe bending devices (3) are installed on both sides of the filling section. The pipe bending device (3) includes a rotatable disc block (31), and a clamping device (4) is provided behind the pipe bending device (3) that can clamp the pipe fitting and bend it along the rotation of the disc block (31). The mold core (2) is provided with a limit block (5) that can limit the position of the pipe fitting on the mold core (2).

2. The pipe bending machine according to claim 1, characterized in that: The limit block (5) comprises an annular block mounted on the mold core (2); the diameter of the annular block is greater than the inner diameter of the pipe; and a locking device capable of locking the position of the limit block (5) is provided on the annular block.

3. The pipe bending machine according to claim 1, characterized in that: The pipe bending device (3) comprises a disc block (31) and a third clamping block (32) located on the right side of the disc block (31); the third clamping block (32) can move left and right to approach / move away from the disc block (31); an annular groove (33) is provided on the outer surface of the disc block (31); the annular groove (33) can fit the outer surface of a pipe to be bent; an end surface of the third clamping block (32) close to the disc block (31) is provided with a pipe bending groove (34) in the same direction as the mold core (2); the annular groove (33) and the pipe bending groove (34) form a pipe bending space; and a filling section of the mold core (2) is located between the annular groove (33) and the pipe bending groove (34).

4. The pipe bending machine according to claim 3, characterized in that: The third clamping block (32) can move along the axis direction of the mold core (2).

5. The pipe bending machine according to claim 1, characterized in that: The clamping device (4) comprises a second frame (41) which can rotate along the axis of the disc block (31); the second frame (41) is provided with a first clamping block (42) and a second clamping block (43) which can move away from or approach the first clamping block (42); the first clamping block (42) and the second clamping block (43) are both provided with a clamping groove (44); when the first clamping block (42) and the second clamping block (43) are fitted together, the two clamping grooves (44) form a clamping space capable of clamping the outer surface of the pipe; the first clamping block (42) is fixedly connected to the disc block (31); the clamping groove (44) of the first clamping block (42) and the annular groove (33) of the disc block (31) are tangent to each other.

6. The pipe bending machine according to claim 1, characterized in that: A driving device capable of driving the mold core (2) to move along an axis is provided at one end of the mold core (2) away from the disc block (31), and the mold core (2) is hingedly connected to the driving device.

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