A low-stress special-shaped welded pipe die

Abstract

The utility model relates to the technical field of welding pipe molds, specifically a low-stress special-shaped welding pipe mold, including an arc-shaped connecting plate, both ends of the arc-shaped connecting plate are slidably clamped with external threaded pipes, the external threaded pipe is detachably fixedly connected to a driving shaft on an external frame, the end of the external threaded pipe facing away from the arc-shaped connecting plate is screwed and connected with a screw-in ring, and the end of the screw-in ring facing away from the external threaded pipe is fixed with an extrusion cover. In the utility model, the fixed column of the welding pipe mold is formed by sliding and clamping the external threaded pipe at both ends of the arc-shaped connecting plate, and the fixed column can adapt to the use of welding pipe mold plates of different lengths, and at the same time, the two rotating rings are rotated in the opposite direction to allow the two extrusion covers to move closer to each other, so that the extrusion cover clamps the welding pipe mold plate to the fixed column, and the shape of the extrusion cover is a truncated cone, and the two extrusion covers can clamp and fix welding pipe mold plates of different apertures close to each other, which is convenient for installing welding pipe mold plates of different aperture sizes during the shaping process of special-shaped welded pipes.

Description

Technical Field

[0001] The utility model relates to the technical field of welded pipe moulds, in particular to a low-stress special-shaped welded pipe mould. Background Art

[0002] The welding pipe mold is a special tool used to produce welding pipes. Its main function is to bend metal sheets into a round shape. The welding pipe mold is usually composed of multiple sets of forming molds and several sets of shaping molds. The metal sheets are fed into the multiple sets of forming molds and rolled into a tube. The welding pipe mold currently in use mainly includes a welding pipe mold plate and a fixed column plugged and fixed in the middle of the welding pipe mold plate. A rotating shaft mounting hole is opened in the middle of the fixed column. The driving shaft on the frame is plugged into the rotating shaft mounting hole to rotate and shape the welding pipe with the welding pipe mold plate. When the welding pipe is a special-shaped welding pipe, a welding pipe mold plate of a corresponding different shape will be installed in the shaping mold of the metal sheet so that the cross section of the welding pipe can be shaped into the required shape;

[0003] In order to facilitate the disassembly and replacement of the welding pipe mold plate on the welding pipe mold on the fixed column, most welding pipe molds are no longer traditional integrally cast metal parts, but metal parts that can be disassembled and installed. For example, a special-shaped pipe welding pipe mold with the authorization announcement number "CN219583595U" is a welding pipe mold for special-shaped pipe fittings that is formed by splitting the integrally set welding pipe mold and forming a welding pipe mold for special-shaped pipe fittings by setting a chassis, a support, a welding pipe mold, a top plate and connecting bolts. When the mold needs to be replaced, the welding pipe mold is disassembled and replaced by removing the connecting bolts and the top cover, thereby improving the replacement efficiency;

[0004] However, generally only the welding pipe mold plate that is compatible with the fixed column is allowed to be installed on the fixed column of this type of welding pipe mold. For example, the welding pipe mold plate in the cited patent can be disassembled and fixed to the fixed column only if a groove is opened in the middle thereof. As a result, welding pipe mold plates of different sizes and types used in the shaping process of special-shaped welded pipes cannot be adapted and installed on the fixed column. In addition, the welding pipe mold is smooth and heavy, which makes it inconvenient for personnel to replace and carry it, increasing their work pressure. Utility Model Content

[0005] The utility model aims to provide a low-stress special-shaped welded pipe die to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A low-stress special-shaped welded pipe mold comprises an arc-shaped connecting plate, both ends of which are slidably clamped with external threaded pipes, the external threaded pipe is detachably fixedly connected to a driving shaft on an external frame, one end of the external threaded pipe facing away from the arc-shaped connecting plate is screwed and connected with a screw-in ring, one end of the screw-in ring facing away from the external threaded pipe is fixed with an extrusion cover, the outer side of the extrusion cover is rotatably connected with a handle, a welding pipe mold disk is clamped and fixed between the two extrusion covers, the welding pipe mold disk is made of high-carbon and high-chromium tool steel, the inner side of the extrusion cover is fixedly connected with a connecting pipe, and the outer side of the connecting pipe is sleeved and fixed with a rotating collar.

[0008] Furthermore, the outer side of the arc-shaped connecting plate is provided with a plurality of grooves at equal angles in a circular shape, one end of the externally threaded tube is evenly fixed with a plurality of blocks which are slidably engaged with the corresponding grooves, and the inner side of the externally threaded tube is provided with a sliding groove which is rotatably engaged with an external driving shaft.

[0009] Furthermore, the extrusion cover has a truncated cone-shaped shell, the rotating ring is hexagonal, and a notch is provided on the outer side of the extrusion cover.

[0010] Furthermore, the outer side of the extrusion cover is provided with an arc-shaped groove for accommodating the handle, and the outer side of the extrusion cover is slidably connected with a pin shaft movably plugged with the handle.

[0011] Furthermore, the pin shaft has an arc shape, an arc groove 2 for accommodating the pin shaft is provided on the outer side of the extrusion cover, and a toggle groove is provided on the outer side of the pin shaft.

[0012] Furthermore, a rotating shaft rotatably connected to the arc groove is fixed at both ends of the handle, and a circular blind hole is opened at both ends of the handle, and the pin shaft is movably plugged into the circular blind hole.

[0013] Further, a rubber sleeve is sleeved and fixed on the outer side of the extrusion cover, the end of the connecting pipe that contacts the extrusion cover is a curved surface, the inner side of the screw-on ring is provided with an internal thread that is screwed and connected to the external threaded pipe, and the internal threads inside the two screw-on rings are screwed in opposite directions.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Insert the external threaded pipe and the arc-shaped connecting plate into the shaft mounting hole in the middle of the welded pipe die to be installed, screw the screwing ring and the extrusion cover on the outside of the external threaded pipe, and then fix the position of the welded pipe die. At the same time, rotate the two rotating rings in opposite directions to make the two extrusion covers move close to each other along the external threaded pipe, and finally squeeze the two extrusion covers into the shaft mounting hole at the end of the welded pipe die. The shape of the extrusion cover is a truncated cone, so that the two extrusion covers can be close to each other to clamp and fix the welded pipe die with different apertures, which is convenient for installing welded pipe die with different apertures (shaft mounting holes) in the process of shaping special-shaped welded pipes.

[0016] 2. By sliding and clamping two external threaded tubes on the outside of the arc-shaped connecting plate, when the length of the welded pipe mold plate is long, the two external threaded tubes can be pulled in opposite directions accordingly, so that the length of the fixed column composed of the external threaded tubes and the arc-shaped connecting plate can be flexibly adjusted, which is convenient for installing welded pipe mold plates of different types and lengths on the fixed column.

[0017] 3. Move the pin inside the extrusion cover to make the pin leave the end of the handle, so that the handle is active inside the extrusion cover, and then turn the handle inside the extrusion cover out from the notch position, so as to facilitate the handling of the welding pipe mold with smooth surface and heavy weight through the handle, thereby reducing the user's work pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the externally threaded pipe and the welded pipe mold plate in the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the externally threaded pipe, the connecting pipe and the screw-on ring in the utility model in a split three-dimensional state;

[0022] Figure 5 This utility model Figure 4 A schematic diagram of the partially enlarged structure at center A;

[0023] Figure 6 It is a structural schematic diagram of the externally threaded pipe and the arc-shaped connecting plate in the utility model.

[0024] In the figure: 100, arc-shaped connecting plate; 110, slot; 200, external threaded pipe; 300, screw-on ring; 310, extrusion cover; 311, handle; 312, pin; 3121, toggle slot; 313, arc-shaped slot 1; 314, notch; 400, welding pipe die; 500, connecting pipe; 510, rotating sleeve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1

[0027] See also Figure 1-6 In the embodiment of the utility model, a low-stress special-shaped welded pipe mold comprises an arc-shaped connecting plate 100, both ends of the arc-shaped connecting plate 100 are slidably clamped with external threaded pipes 200, the external threaded pipe 200 is detachably fixedly connected to the driving shaft on the external frame, one end of the external threaded pipe 200 away from the arc-shaped connecting plate 100 is screwed and connected with a screw-on ring 300, one end of the screw-on ring 300 away from the external threaded pipe 200 is fixed with an extrusion cover 310, the outer side of the extrusion cover 310 is rotatably connected with a handle 311, a welding pipe die plate 400 is clamped and fixed between the two extrusion covers 310, the material of the welding pipe die plate 400 is high-carbon and high-chromium tool steel, the inner side of the extrusion cover 310 is fixedly connected with a connecting pipe 500, and the outer side of the connecting pipe 500 is sleeved and fixed with a rotating sleeve ring 510.

[0028] Specifically, the external threaded tube 200 is slidably clamped at both ends of the arc-shaped connecting plate 100 to form a fixed column of the welding pipe mold. The fixed column can adapt to the use of welding pipe mold plates 400 of different lengths. At the same time, the two rotating rings 510 are rotated in opposite directions to enable the two extrusion covers 310 to move closer to each other, so that the extrusion covers 310 clamp and fix the welding pipe mold plate 400 on the fixed column. The outer shape of the extrusion cover 310 is a truncated cone, so that the two extrusion covers 310 can approach each other to clamp and fix welding pipe mold plates 400 of different apertures, which is convenient for installing welding pipe mold plates 400 of different aperture sizes during the shaping process of special-shaped welded pipes.

[0029] like Figure 6 As shown, in this embodiment, a plurality of grooves 110 are provided in a circular shape at equal angles on the outer side of the arc-shaped connecting plate 100, a plurality of clamping blocks are evenly fixed to one end of the external threaded tube 200, which are respectively slidably engaged with the corresponding grooves 110, and a sliding groove for rotationally engaging with an external driving shaft is provided on the inner side of the external threaded tube 200, so that the external threaded tube 200 will not separate from the arc-shaped connecting plate 100.

[0030] like Figure 4As shown, in this embodiment, the extrusion cover 310 has a truncated cone-shaped shell, the rotating ring 510 is hexagonal, and a notch 314 is provided on the outer side of the extrusion cover 310. The extrusion cover 310 is a truncated cone-shaped shell, which is convenient for extruding and fixing welding pipe molds 400 of different sizes, and the rotating ring 510 is convenient for rotation using external tools such as wrenches.

[0031] like Figure 4 As shown, in this embodiment, a rubber sleeve is fixed to the outer side of the extrusion cover 310, and the end of the connecting tube 500 that contacts the extrusion cover 310 is a curved surface. The inner side of the screw-on ring 300 is provided with an internal thread that is screwed together with the external threaded tube 200. The internal threads inside the two screw-on rings 300 have opposite rotation directions. The rubber sleeve enables the extrusion cover 310 to firmly extrude and fix the welding pipe mold plate 400. The curved surface adapts to the shape of the inner side of the extrusion cover 310. The internal threads inside the two screw-on rings 300 have opposite rotation directions, which facilitates the simultaneous reverse rotation of the two screw-on rings 300 so that the two can move synchronously along the external threaded tube 200.

[0032] During the specific implementation, the fixed column composed of the arc-shaped connecting plate 100 and the externally threaded tube 200 is placed in the rotating shaft mounting hole inside the welding pipe die plate 400, and the externally threaded tube 200 is pulled in directions away from each other so that the two ends of the fixed column can extend to the outside of the welding pipe die plate 400, and then the screwing ring 300 and the extrusion cover 310 are screwed together on the outside of the externally threaded tube 200, and then the position of the welding pipe die plate 400 is fixed (the position of the welding pipe die plate 400 can be fixed by using an external clamp, or the welding pipe die plate 400 can be stepped on with one foot, and then the connecting tube 500 is rotated with a wrench to squeeze and fix the welding pipe die plate 400), and at the same time, the two rotating rings 510 are rotated in the opposite direction to make the two extrusion covers 310 move close to each other along the externally threaded tube 200, and finally the two extrusion covers 310 are squeezed into the rotating shaft mounting hole at the end of the welding pipe die plate 400 to fix the welding pipe die plate 400.

[0033] Embodiment 2

[0034] On the basis of the first embodiment, the handle 311 can be stored and fixed inside the extrusion cover 310 when not in use.

[0035] like Figure 5 and Figure 5As shown, in this embodiment, an arc-shaped groove 1 313 for accommodating the handle 311 is provided on the outer side of the extrusion cover 310, a pin shaft 312 movably connected to the handle 311 is slidably clamped on the outer side of the extrusion cover 310, and the pin shaft 312 has an arc-shaped shape. An arc-shaped groove 2 for accommodating the pin shaft 312 is provided on the outer side of the extrusion cover 310, a toggle groove 3121 is provided on the outer side of the pin shaft 312, and both ends of the handle 311 are fixed with a rotating shaft rotatably connected to the arc-shaped groove 1 313, and a circular blind hole is provided at one end of the handle 311, and the pin shaft 312 is movably connected to the circular blind hole.

[0036] In this embodiment, when the pin shaft 312 is inserted into the circular blind hole at the end of the handle 311, the handle 311 is limited and fixed inside the arc groove 1 313 to prevent the handle 311 from automatically rotating out. When the pin shaft 312 moves to the inside of the arc groove 2, the handle 311 is in an active state inside the arc groove 1 313, which makes it convenient to rotate the handle 311 out to carry the welding pipe mold plate 400.

[0037] In this utility model, high carbon high chromium tool steel material: such as Cr12, Cr12MoV, etc., this type of steel has high hardness, high wear resistance and good toughness, and is suitable for manufacturing low stress welded pipe molds. Figure 1 and Figure 2 Two different types of welded pipe mold plates 400 are shown as examples.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A low-stress special-shaped welded pipe mold, comprising an arc-shaped connecting plate (100), characterized in that: Both ends of the arc-shaped connecting plate (100) are slidably connected with external threaded tubes (200), the external threaded tube (200) is detachably fixedly connected to a driving shaft on an external frame, one end of the external threaded tube (200) facing away from the arc-shaped connecting plate (100) is screwed and connected with a screw-in ring (300), one end of the screw-in ring (300) facing away from the external threaded tube (200) is fixed with an extrusion cover (310), the outer side of the extrusion cover (310) is rotatably connected with a handle (311), a welding pipe die plate (400) is clamped and fixed between the two extrusion covers (310), the material of the welding pipe die plate (400) is high-carbon high-chromium tool steel, the inner side of the extrusion cover (310) is fixedly connected with a connecting tube (500), and the outer side of the connecting tube (500) is sleeved and fixed with a rotating sleeve ring (510).

2. A low-stress special-shaped welded pipe mold according to claim 1, characterized in that: The outer side of the arc-shaped connecting plate (100) is provided with a plurality of slots (110) at equal angles in a circular shape, one end of the external threaded tube (200) is evenly fixed with a plurality of clamping blocks that are respectively slidably engaged with the slots (110) at corresponding positions, and the inner side of the external threaded tube (200) is provided with a sliding groove that is rotatably engaged with an external drive shaft.

3. A low-stress special-shaped welded pipe mold according to claim 1, characterized in that: The extrusion cover (310) is in the shape of a truncated cone shell, the rotating collar (510) is in the shape of a hexagon, and a notch (314) is provided on the outer side of the extrusion cover (310).

4. A low-stress special-shaped welded pipe mold according to claim 1, characterized in that: The outer side of the extrusion cover (310) is provided with an arc-shaped groove (313) for conveniently accommodating the handle (311), and the outer side of the extrusion cover (310) is slidably engaged with a pin shaft (312) movably plugged with the handle (311).

5. A low-stress special-shaped welded pipe mold according to claim 4, characterized in that: The pin shaft (312) has an arc shape, and an arc groove 2 for accommodating the pin shaft (312) is provided on the outer side of the extrusion cover (310), and a toggle groove (3121) is provided on the outer side of the pin shaft (312).

6. A low-stress special-shaped welded pipe mold according to claim 5, characterized in that: A rotating shaft rotatably connected to the arc groove 1 (313) is fixed at both ends of the handle (311), a circular blind hole is opened at one end of the handle (311), and a pin shaft (312) is movably plugged into the circular blind hole.

7. A low-stress special-shaped welded pipe mold according to claim 1, characterized in that: A rubber sleeve is sleeved and fixed on the outer side of the extrusion cover (310); the end of the connecting pipe (500) in contact with the extrusion cover (310) is a curved surface; the inner side of the screw-on ring (300) is provided with an internal thread that is screwed and connected to the external threaded pipe (200); the internal threads of the two screw-on rings (300) are screwed in opposite directions.

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