External sizing die for special-shaped short pipe

Abstract

The external shape correcting die comprises a die holder which is arranged on an oil press workbench and located below an oil press punch, a shape correcting die hole penetrating to the lower end face is formed in the upper end face of the die holder, the lower end of the special-shaped short pipe is located at the position of a hole opening in the upper end of the shape correcting die hole, and a pressing block is arranged at the upper end of the special-shaped short pipe. The special-shaped short pipe is pressed into the shape correction die hole through an oil press punch in contact with the pressing block to achieve shape correction of the outer contour size of the special-shaped short pipe, and the special-shaped short pipe subjected to shape correction in the shape correction die hole is pushed out of the shape correction die hole through the pressing block which is reversed and stretches into the shape correction die hole. The special-shaped short pipe shaping device overcomes the defect that a special-shaped short pipe cut in a fixed-length mode is inconsistent with the required outer contour size, guarantees the outer contour size of the special-shaped short pipe, is simple in structure, convenient to operate, good in shaping effect and high in efficiency, and provides correction conditions for the special-shaped short pipe with deviation of the outer contour size.

Description

Technical Field

[0001] The utility model belongs to the technical field of rectangular tube shaping, and in particular relates to an external shaping die for special-shaped short tubes. Background Art

[0002] At present, special-shaped short tubes are cut from special-shaped long tubes produced by manufacturers. However, in the actual production process, the outer contour dimensions of the special-shaped short tubes cut to a fixed length are 1 to 2 mm larger than the required outer contour dimensions, which does not meet the outer contour dimension requirements of the finished special-shaped short tubes. The reason is that the factory outer contour dimensions of the purchased special-shaped long tubes are too large, which causes the outer contour of the special-shaped short tubes cut to a fixed length to deviate. The uncut special-shaped long tubes can be returned to the factory for processing, but for the special-shaped short tubes cut to a fixed length, it is necessary to design an outer correction mold to solve the above technical problems. Utility Model Content

[0003] The technical problem solved by the utility model is as follows: a mold for outer shaping of special-shaped short tubes is provided, by arranging a mold base with shaping die holes on a hydraulic press workbench, and the hydraulic press punch presses the special-shaped short tube whose lower end is adapted to the orifice of the shaping die hole into the shaping die hole for shaping through a pressing block, and the special-shaped short tube whose shaping is completed and located in the shaping die hole is pushed out through the pressing block after reversal, thereby solving the problem that the special-shaped short tube cut to a fixed length is inconsistent with the required outer contour size, ensuring the outer contour size of the special-shaped short tube, having a simple structure, convenient operation, good shaping effect, high efficiency, and providing correction conditions for the special-shaped short tube with deviation in the outer contour size.

[0004] The technical solution adopted by the utility model is as follows: a mold for external shaping of special-shaped short tubes, comprising a mold base arranged on a hydraulic press workbench and located below a punch of the hydraulic press, the upper end face of the mold base is formed with a shaping die hole penetrating to the lower end face, and the lower end of the special-shaped short tube is located at the upper end opening of the shaping die hole, a pressing block is provided at the upper end of the special-shaped short tube, and the special-shaped short tube is pressed into the shaping die hole by the punch of the hydraulic press in contact with the pressing block to achieve shaping of the outer contour size of the special-shaped short tube, and the special-shaped short tube that has been shaped in the shaping die hole is pushed out of the shaping die hole by the pressing block that changes direction and extends into the shaping die hole.

[0005] Among them, the mold base includes a seat plate and support legs. The seat plate is supported on the hydraulic press workbench by a plurality of support legs evenly distributed on the bottom surface of the seat plate. The correction mold hole is centered and penetrates the seat plate. The height of the support legs is greater than the thickness of the seat plate.

[0006] Furthermore, the pressing block is a T-shaped block with a cross-sectional dimension at one end larger than that at the other end, the lower end face dimension of the large head section of the pressing block is larger than the end face dimension of the special-shaped short tube, the end face dimension of the small head section of the pressing block is smaller than the end face dimension of the special-shaped short tube, and the end face dimension of the small head section of the pressing block is larger than the cross-sectional dimension of the tube hole of the special-shaped short tube, and the length of the small head section of the pressing block is not less than the depth of the shaping die hole.

[0007] Furthermore, the large head section of the pressing block is used to press the special-shaped short tube into the shaping die hole to achieve the shaping of the special-shaped short tube, and the small head section of the pressing block is used to push the special-shaped short tube pressed into the shaping die hole out of the shaping die hole to achieve demolding of the special-shaped short tube.

[0008] Furthermore, the upper end opening of the shaping die hole is formed with a chamfer to facilitate the insertion of the lower end of the special-shaped short tube.

[0009] Furthermore, a plastic protective film is provided between the upper opening of the shaping die hole and the lower end of the special-shaped short tube.

[0010] The advantages of this utility model compared with the prior art:

[0011] 1. This technical solution solves the problem that the short shaped tube cut to a fixed length is inconsistent with the required outer contour size by arranging a die seat with a shaping die hole on the workbench of the hydraulic press, and the punch of the hydraulic press presses the short shaped tube whose lower end is adapted to the opening of the shaping die hole into the shaping die hole through a pressing block for shaping, and pushes out the short shaped tube after shaping and located in the shaping die hole through the pressing block after reversing, thereby ensuring the outer contour size of the short shaped tube;

[0012] 2. This technical solution adopts a T-shaped pressing block with a cross-sectional size at one end larger than that at the other end, which provides conditions for pressing in the special-shaped short tube during shaping and demolding after shaping;

[0013] 3. This technical solution has a simple structure, is easy to operate, has a good correction effect, and is highly efficient, and provides correction conditions for special-shaped short tubes with deviations in outer contour dimensions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the embodiment of the present utility model Figure 1 , 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 them. Based on the embodiments of 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.

[0016] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0017] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0018] For the external shaping mold of special-shaped short tubes, such as Figure 1 As shown, it includes a die base 1 arranged on the workbench of the hydraulic press and located below the punch of the hydraulic press, the upper end face of the die base 1 is formed with a shaping die hole 2 that penetrates to the lower end face, and the lower end of the special-shaped short tube 3 is located at the upper end hole position of the shaping die hole 2, the upper end of the special-shaped short tube 3 is provided with a pressing block 4, and the special-shaped short tube 3 is pressed into the shaping die hole 2 by the hydraulic press punch that contacts with the pressing block 4 to achieve the shaping of the outer contour size of the special-shaped short tube 3, and the special-shaped short tube 3 that has been shaped in the shaping die hole 2 is pushed out of the shaping die hole 2 by the pressing block 4 that changes direction and extends into the shaping die hole 2.

[0019] The specific structure of the mold base 1 is as follows: the mold base 1 includes a base plate 1-1 and support legs 1-2. The base plate 1-1 is supported on the workbench of the hydraulic press by a plurality of support legs 1-2 evenly distributed on the bottom surface of the base plate 1-1. The correction mold hole 2 is centered and penetrates the base plate 1-1. The height of the support legs 1-2 is greater than the thickness of the base plate 1-1.

[0020] The specific structure of the pressing block 4 is as follows: the pressing block 4 is a T-shaped block with a cross-sectional size at one end larger than that at the other end; the lower end face size of the large head section of the pressing block 4 is larger than the end face size of the special-shaped short tube 3; when the special-shaped short tube 3 is pressed into the shaping die hole 2, the large head end of the pressing block 4 is pressed on the upper end face of the special-shaped short tube 3; when the punch presses the pressing block 4 downward, it is beneficial to ensure that the special-shaped short tube 3 is subjected to uniform force and the quality of the downward shaping; the end face size of the small head section of the pressing block 4 is smaller than the end face size of the special-shaped short tube 3, and the end face size of the small head section of the pressing block 4 is larger than that of the special-shaped short tube 3. The cross-sectional size of the tube hole of the short tube 3, the length of the small head section of the pressing block 4 is not less than the depth of the shaping die hole 2, after the shaping of the special-shaped short tube 3 is completed, the small head section of the pressing block 4 that can be extended into the shaping die hole 2 and rests on the upper end of the special-shaped short tube 3 is used to push the special-shaped short tube 3 out of the shaping die hole 2; specifically, the large head section of the pressing block 4 is used to press the special-shaped short tube 3 into the shaping die hole 2 to achieve the shaping of the special-shaped short tube 3, and the small head section of the pressing block 4 is used to push the special-shaped short tube 3 pressed into the shaping die hole 2 out of the shaping die hole 2 to achieve the demoulding of the special-shaped short tube 3.

[0021] Since the size of the shaping die hole 2 is the same as the target outer contour size of the special-shaped short tube 3, the size of the shaping die hole 2 is slightly smaller than the outer contour size of the special-shaped short tube 3. In order to ensure that the special-shaped short tube 3 can smoothly enter the shaping die hole 2, a chamfer is specially formed at the upper end of the shaping die hole 2 to facilitate the installation of the lower end of the special-shaped short tube 3.

[0022] In order to reduce the scratches on the outer wall of the special-shaped short tube 3 caused by the friction between the hole wall of the shaping die hole 2 and the outer wall of the special-shaped short tube 3 during the shaping process, a plastic protective film 5 is provided between the upper hole of the shaping die hole 2 and the lower end of the special-shaped short tube 3, so as to play a role in lubrication and friction reduction.

[0023] 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.

[0024] 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. Used for the external shaping mold of special-shaped short tubes, characterized by: The invention comprises a die base (1) arranged on a hydraulic press workbench and located below a punch of the hydraulic press, wherein the upper end surface of the die base (1) is provided with a shaping die hole (2) penetrating to the lower end surface, and the lower end of a special-shaped short tube (3) is located at the upper end opening of the shaping die hole (2), a pressing block (4) is arranged at the upper end of the special-shaped short tube (3), and the special-shaped short tube (3) is pressed into the shaping die hole (2) by the punch of the hydraulic press in contact with the pressing block (4) to achieve shaping of the outer contour size of the special-shaped short tube (3), and the special-shaped short tube (3) that has been shaped in the shaping die hole (2) is pushed out of the shaping die hole (2) by the pressing block (4) that changes direction and extends into the shaping die hole (2).

2. The outer shaping mold for special-shaped short tubes according to claim 1, characterized in that: The die base (1) comprises a seat plate (1-1) and supporting legs (1-2); the seat plate (1-1) is supported on a hydraulic press workbench by a plurality of supporting legs (1-2) evenly distributed on the bottom surface of the seat plate (1-1); the shaping die hole (2) is centrally located and penetrates the seat plate (1-1); and the height of the supporting legs (1-2) is greater than the thickness of the seat plate (1-1).

3. The outer shaping mold for special-shaped short tubes according to claim 1, characterized in that: The pressing block (4) is a T-shaped block with a cross-sectional dimension at one end larger than that at the other end; the lower end face dimension of the large head section of the pressing block (4) is larger than the end face dimension of the special-shaped short tube (3); the end face dimension of the small head section of the pressing block (4) is smaller than the end face dimension of the special-shaped short tube (3); the end face dimension of the small head section of the pressing block (4) is larger than the cross-sectional dimension of the tube hole of the special-shaped short tube (3); and the length of the small head section of the pressing block (4) is not less than the depth of the shaping die hole (2).

4. The outer shaping mold for special-shaped short tubes according to claim 3, characterized in that: The large head section of the pressing block (4) is used to press the special-shaped short tube (3) into the shaping die hole (2) to achieve shaping of the special-shaped short tube (3), and the small head section of the pressing block (4) is used to push the special-shaped short tube (3) pressed into the shaping die hole (2) out of the shaping die hole (2) to achieve demoulding of the special-shaped short tube (3).

5. The outer shaping mold for special-shaped short tubes according to any one of claims 1 to 4, characterized in that: The upper end opening of the shaping die hole (2) is provided with a chamfer for facilitating the insertion of the lower end of the special-shaped short tube (3).

6. The outer shaping mold for special-shaped short tubes according to claim 5, characterized in that: A plastic protective film (5) is provided between the upper opening of the shaping die hole (2) and the lower end of the special-shaped short tube (3).

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