Bending die mechanism of pipe bending machine

Abstract

A bending die mechanism of a pipe bending machine comprises a bending die, a clamping die, a supporting die and a supporting die wheel. The top face and the bottom face of the bending die are each provided with a semi-circular groove matched with a pipe fitting, and a groove meeting the bending radius of the pipe fitting is formed in the bending die and communicated with the semi-circular grooves of the bending die. The clamping die is provided with a clamping die semicircular groove matched with a pipe fitting, the clamping die and the bending die are oppositely arranged, the clamping die semicircular groove in the bending die and the clamping die semicircular groove in the clamping die form a circular groove allowing the pipe fitting to pass through, and the bending die and the clamping die semicircular groove are driven by a pipe bending driving mechanism to rotate. The supporting mold is provided with a supporting mold semicircular groove matched with the pipe fitting, the supporting mold is installed on the demolding plate, the supporting mold wheel is rotationally supported by the supporting mold wheel installation base, the supporting mold wheel installation base is installed at the end of the supporting mold, and the supporting mold wheel is provided with a through groove which enables the pipe fitting to pass through and can support the pipe fitting. According to the utility model, the die supporting wheel is arranged at the bending part, and when a pipe is bent, as the die supporting wheel can rotate along with the movement of the pipe, the frictional resistance between the pipe and the die supporting wheel can be obviously reduced, and the section can still be kept round.

Description

Technical Field

[0001] The utility model relates to a bending die mechanism of a pipe bending machine. Background Art

[0002] When bending long U-tubes, the pipe bending machine usually needs to be equipped with a bending die, such as Figure 1 As shown, the bending die includes a bending die 1, a clamping die 2 and a supporting die 3. Semicircular grooves 101 adapted to the pipe fitting 4 are respectively arranged on the bending die 1, the clamping die 2 and the supporting die 3. A groove 102 satisfying the bending radius is also arranged on the bending die 1, which is connected with the semicircular groove 101 thereon. The bending die 1 and the clamping die 2 are arranged opposite to each other. The feeding mechanism (not shown in the figure) of the pipe bending machine clamps and feeds the pipe fitting 4, passes through the circular groove formed by the two semicircular grooves 101 on the bending die 1 and the clamping die 2, and then enters the supporting die. When the pipe fitting 4 is delivered to the position, the driving mechanism (not shown in the figure) of the clamping die 2 moves the clamping die 2 toward the bending die 1 to clamp one end of the pipe fitting 4. The other end of the pipe fitting 4 is supported and guided by the supporting die 3 to prevent the pipe fitting from swinging. Then the bending die 1 and the clamping die 2 rotate together to bend a long U-tube. During the rotation of the bending die 1 and the clamping die 2, the pipe fitting 4 is driven to move in the semicircular groove of the support die 3. At the bending portion, due to the surface contact between the pipe fitting 4 and the support die 3, the friction resistance during movement is particularly large, and the pipe fitting 4 is at risk of being dragged flat and the cross-sectional distortion is serious. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art and provide a bending die mechanism of a pipe bending machine, which can reduce the friction resistance between the pipe and the supporting die and prevent the pipe from being dragged flat.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A bending die mechanism of a pipe bending machine comprises a bending die, a clamping die, a supporting die and a supporting die wheel; semicircular grooves adapted to pipe fittings are arranged on the top and bottom surfaces of the bending die, and a groove satisfying the bending radius of the pipe fittings is also arranged on the bending die, which is connected with the semicircular grooves on the top and bottom surfaces of the bending die; the clamping die is provided with a clamping die semicircular groove adapted to the pipe fittings, and the clamping die is arranged opposite to the bending die, so that the semicircular grooves on the bending die and the clamping die semicircular grooves on the clamping die form a circular groove through which the pipe fittings can pass, and both are driven to rotate by a bending drive mechanism; the supporting die is provided with a supporting die semicircular groove adapted to the pipe fittings, the supporting die is installed on a stripping plate, the supporting die wheel is rotatably supported by a supporting die wheel mounting seat, the supporting die wheel mounting seat is installed at the end of the supporting die, and a through groove is provided on the supporting die wheel through which the pipe fittings can pass and can support the pipe fittings.

[0006] More specifically, the die-supporting wheel is rotatably mounted on a pin shaft, and two ends of the pin shaft are fixed on two sides of a die-supporting wheel mounting seat.

[0007] More specifically, the die wheel is fixed on a pin, and the pin is rotatably fixed on the die wheel mounting seat.

[0008] Compared with the prior art, the utility model has the advantages that: installing the die wheel at the bending part is equivalent to shortening the length of the die. In this way, when bending the pipe, although the pipe fitting and the die wheel are also in surface contact, the die wheel will rotate as the pipe fitting moves, which can significantly reduce the friction resistance between the pipe fitting and the die wheel, thereby preventing the pipe fitting from being dragged flat and its cross-section can still remain circular. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a three-dimensional structural schematic diagram of the existing pipe bending machine when the bending die mechanism is ready to bend the pipe fittings after the feeding is completed.

[0010] Figure 2 This is a schematic diagram of the three-dimensional structure of a bending die mechanism of a pipe bender after bending a pipe fitting according to an embodiment of the utility model.

[0011] Figure 3 It is a schematic diagram of the three-dimensional structure of a die support wheel of a bending die mechanism of a pipe bending machine according to an embodiment of the utility model.

[0012] Figure 4 It is a front view of a die support wheel of a bending die mechanism of a pipe bending machine according to an embodiment of the utility model.

[0013] Figure 5 This is a cross-sectional view of a pipe after being bent by a bending die mechanism of a pipe bender according to an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] like Figure 2 As shown, a bending die mechanism of a pipe bending machine includes a bending die 1, a clamping die 2, a supporting die 3 and a supporting die wheel 5.

[0016] Semicircular grooves 101 adapted to the pipe fitting 4 are arranged on the top and bottom surfaces of the bending die 1. A groove 102 meeting the bending radius is also arranged on the bending die 1, which is connected with the semicircular groove 101 on the top surface and the semicircular groove 101 on the bottom surface of the bending die 1.

[0017] The clamping die 2 is provided with a clamping die semicircular groove 201 adapted to the pipe fitting 4, and the bending die 1 and the clamping die 2 are arranged relative to each other so that the semicircular groove 101 on the top surface of the bending die 1 and the clamping die semicircular groove 201 on the clamping die 2 form a circular groove for the pipe fitting 4 to pass through, and both the bending die 1 and the clamping die 2 are connected to a bending pipe driving mechanism (not shown) and driven thereby to rotate.

[0018] The ejector mold 3 is provided with an ejector mold semicircular groove 301 adapted to the pipe fitting 4 , and the ejector mold 3 is installed on a stripping plate 31 .

[0019] like Figure 3 , 4 As shown, the die wheel 5 is rotatably supported by the die wheel mounting seat 6. Specifically, the die wheel is rotatably mounted on a pin shaft 61. The two ends of the pin shaft 61 are fixed on the two sides of the die wheel mounting seat. The die wheel mounting seat 6 is installed on the end of the die 3. The die wheel 5 is provided with a through groove 501, which is adapted to the pipe fitting 4 so that the pipe fitting 4 can pass through conveniently and can support the pipe fitting 4.

[0020] Figure 5 It is a schematic diagram of the state of the bending die mechanism after the pipe fitting 4 is bent into a U-shape. In the process of the pipe fitting 4 being bent into a U-shape, the bending die 1 and the clamping die 2 rotate, which will cause the pipe fitting 4 to slide relative to the support die 3. Since the length of the support die 3 is shortened, a support die wheel 5 is added at the bending part 7 instead. In this way, when the pipe fitting 4 at the bending part moves, rolling friction occurs between the support die wheel 5, and the friction resistance is significantly reduced, which prevents the pipe fitting from being dragged flat, and the cross section of the pipe fitting can still remain circular.

Claims

1. A bending die mechanism for a pipe bender, characterized in that: Including bend The invention relates to a mold, a clamping mold, a supporting mold and a supporting mold wheel; semicircular grooves adapted to the pipe fittings are arranged on the top and bottom surfaces of the bending mold, and a groove that meets the bending radius of the pipe fittings is also arranged on the bending mold, which is connected with the semicircular grooves on the top and the bottom of the bending mold; the clamping mold is provided with a clamping mold semicircular groove adapted to the pipe fittings, and the clamping mold and the bending mold are arranged opposite to each other, so that the semicircular grooves on the bending mold and the clamping mold semicircular grooves on the clamping mold form a circular groove for the pipe fittings to pass through, and both are driven to rotate by the bending pipe driving mechanism; the supporting mold is provided with a supporting mold semicircular groove adapted to the pipe fittings, the supporting mold is installed on the stripping plate, the supporting mold wheel is rotatably supported by a supporting mold wheel mounting seat, the supporting mold wheel mounting seat is installed at the end of the supporting mold, and the supporting mold wheel is provided with a through groove for the pipe fittings to pass through and support the pipe fittings.

2. The bending die mechanism of the pipe bender according to claim 1, characterized in that: The die support wheel is rotatably mounted on a pin shaft, and two ends of the pin shaft are fixed on two sides of a die support wheel mounting seat.

3. The bending die mechanism of the pipe bender according to claim 1, characterized in that: The die support wheel is fixed on a pin, and the pin is rotatably fixed on a die support wheel mounting seat.

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