Steel pipe bending die

Abstract

The utility model relates to the technical field of steel pipe machining, and discloses a steel pipe bending die which comprises an upper die and a lower die, four bolts are symmetrically arranged at the bottom of the upper die, the upper die and the lower die are arranged in a butt joint mode, and the upper die and the lower die are fixedly connected through the four bolts. The steel pipe bending die is small in bending deviation, high in efficiency, low in manufacturing cost, capable of being suitable for bending steel pipes with different pipe diameters by selecting lower die sizes with different radians, convenient and fast to replace and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing, in particular to a steel pipe bending die. Background Art

[0002] Welded steel pipes can be used for power transmission line towers, UHV line towers, offshore wind power towers or water pipelines, gas pipelines, heating pipelines, electrical pipelines, etc.

[0003] At present, welded steel pipes need to be bent into a tube shape by pressing down a mold from an iron plate. However, due to the difference in mold process and the different sizes of the pipes bent by pressing down, different types of molds are needed. The existing steel pipe bending mold is not easy to disassemble and assemble, so that the size of the mold cannot match the required arc of the welded steel pipe, resulting in increased manufacturing costs and low production efficiency. To this end, a steel pipe bending mold is proposed. Utility Model Content

[0004] The utility model aims to solve the problems raised by the background technology and provides a steel pipe bending die.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A steel pipe bending die comprises an upper die and a lower die. Four bolts are symmetrically arranged at the bottom of the upper die. The upper die and the lower die are butt-jointed and fixedly connected by the four bolts.

[0007] Preferably, the upper mold includes a connecting plate and a vertical plate, the vertical plate is vertically fixed on the upper surface of the connecting plate, the upper surface of the connecting plate is provided with a mounting hole, and the bolt is inserted into the interior of the mounting hole.

[0008] Preferably, a plurality of evenly distributed rib plates are fixedly provided between both sides of the connecting plate and the vertical plate.

[0009] Preferably, the lower mold is an arc-shaped plate, and the side where the lower mold is connected to the upper mold is arranged in a flat surface.

[0010] Preferably, the upper surface of the lower mold is provided with screw holes matching with four bolts.

[0011] Preferably, the bolts are M bolts.

[0012] Compared with the prior art, the utility model provides a steel pipe bending die having the following

[0013] Beneficial effects:

[0014] The steel pipe bending die has bolts arranged between the upper die and the lower die. When it is necessary to replace the lower die with a different curvature, the bolts need only be loosened with a wrench to separate the lower die from the upper die. At this time, according to the curvature of the steel pipe to be bent, the lower die with different curvatures is selected and then fixed to the bottom of the upper die with bolts, so that steel pipes with different curvatures can be bent, thereby improving production efficiency and reducing manufacturing costs.

[0015] The parts not involved in the device are the same as the existing technology or can be implemented by the existing technology. The utility model has small bending deviation, high efficiency and low cost. Moreover, by selecting lower mold sizes with different curvatures, it can be suitable for bending steel pipes with different diameters. It is easy to replace and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a steel pipe bending die proposed by the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the middle and upper mold;

[0018] Figure 3 for Figure 2 Side view of;

[0019] Figure 4 for Figure 2 A top view of the middle connecting plate;

[0020] Figure 5 for Figure 1 Top view of the middle and lower molds;

[0021] Figure 6 for Figure 1 Side cross-sectional view of the middle and lower mold.

[0022] In the figure: 1. upper die; 2. lower die; 3. bolt; 4. connecting plate; 5. vertical plate; 6. mounting hole; 7. rib plate; 8. screw hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] 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, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Reference Figure 1-6 , a steel pipe bending die, comprising an upper die 1 and a lower die 2, four bolts 3 are symmetrically arranged at the bottom of the upper die 1, the upper die 1 and the lower die 2 are butt-jointed, the lower die 2 adopts an arc-shaped plate, and the side where the lower die 2 is connected to the upper die 1 adopts a flat setting, and the upper die 1 and the lower die 2 are fixedly connected by four bolts 3, and the upper surface of the lower die 2 is provided with screw holes 8 matching the four bolts 3, and the bolts 3 are M12 bolts. The bolts 3 are manually loosened with a wrench so that the bolts 3 are taken out from the inside of the screw holes 8, and the lower die 2 is separated from the upper die 1. At this time, according to the different curvatures of the bent steel pipes, lower dies 2 with different curvatures are selected, and then fixedly installed on the bottom of the upper die 1 by bolts 3, so that steel pipes with different curvatures can be bent, thereby improving production efficiency and having low manufacturing costs.

[0026] The upper mold 1 includes a connecting plate 4 and a vertical plate 5. The vertical plate 5 is vertically fixed on the upper surface of the connecting plate 4. A mounting hole 6 is opened on the upper surface of the connecting plate 4. The bolt 3 is inserted into the mounting hole 6. A plurality of evenly distributed ribs 7 are fixed between the connecting plate 4 and the vertical plate 5 on both sides. The ribs 7 can reinforce the structure between the connecting plate 4 and the vertical plate 5, thereby improving the overall structural strength of the upper mold 1. At the same time, corresponding assembly holes are provided on the vertical plate 5.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steel pipe bending die, comprising an upper die (1) and a lower die (2), characterized in that: Four bolts (3) are symmetrically arranged at the bottom of the upper die (1); the upper die (1) and the lower die (2) are butt-jointed, and the upper die (1) and the lower die (2) are fixedly connected by the four bolts (3).

2. A steel pipe bending die according to claim 1, characterized in that: The upper mold (1) comprises a connecting plate (4) and a vertical plate (5); the vertical plate (5) is vertically fixed on the upper surface of the connecting plate (4); a mounting hole (6) is provided on the upper surface of the connecting plate (4); and the bolt (3) is inserted into the interior of the mounting hole (6).

3. A steel pipe bending die according to claim 2, characterized in that: A plurality of evenly distributed rib plates (7) are fixedly provided between the connection plate (4) and the two sides of the vertical plate (5).

4. A steel pipe bending die according to claim 1, characterized in that: The lower die (2) is an arc-shaped plate, and the side where the lower die (2) is connected to the upper die (1) is arranged in a flat surface.

5. The steel pipe bending die according to claim 1, characterized in that: The upper surface of the lower mold (2) is provided with screw holes (8) that match the four bolts (3).

6. A steel pipe bending die according to claim 1, characterized in that: The bolt (3) is an M12 bolt.

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