Internal sizing die for special-shaped short pipe

Abstract

The internal shape correcting die for the special-shaped short pipe comprises a bottom plate arranged on an oil press workbench, a positioning seat is fixed to the upper end face of the bottom plate, the lower end of the special-shaped short pipe vertically corresponding to an oil press punch is located above the bottom plate and is positioned and supported on the positioning seat, and a shape correcting block with the same size as a target inner hole is arranged at a pipe opening in the upper end of the special-shaped short pipe. And a push rod of which the upper end is clamped on the oil press punch is propped against the shape correcting block, and the oil press punch which moves downwards drives the push rod to press the shape correcting block downwards from the pipe orifice at the upper end of the special-shaped short pipe to penetrate out of the pipe orifice at the lower end, so that the shape correction of the inner hole of the special-shaped short pipe is realized. The oil press punch moving downwards drives the push rod to press the shape correcting block downwards from the upper end pipe opening of the special-shaped short pipe to penetrate out of the lower end pipe opening, shape correction of the inner hole of the special-shaped short pipe is achieved, the defect that the size of the special-shaped short pipe cut in a fixed-length mode is inconsistent with the size of the needed inner hole is overcome, the size of the inner hole of the special-shaped short pipe is guaranteed, the structure is simple, operation is convenient, the shape correcting effect is good, and production efficiency is high. The efficiency is high, and correction conditions are provided for the special-shaped short pipe with the large inner hole size.

Description

Technical Field

[0001] The utility model belongs to the technical field of rectangular tube shaping, and in particular relates to an internal 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 inner hole size of the special-shaped short tubes cut to a fixed length is 1 to 2 mm smaller than the required inner hole size, which does not meet the inner hole size requirements of the finished special-shaped short tubes. The reason is that the factory inner hole size of the purchased special-shaped long tubes is too small, which causes the inner hole size 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 internal correction mold to solve the above technical problems. Utility Model Content

[0003] The technical problem solved by the utility model is as follows: an internal shaping mold for special-shaped short tubes is provided, by arranging a bottom plate with a positioning seat fixed on the upper end surface on the workbench of a hydraulic press, and the downward-moving hydraulic press punch drives a push rod to press a shaping block from the upper end of the special-shaped short tube to pass through the lower end, so as to achieve the shaping of the inner hole of the special-shaped short tube, solves the disadvantage that the special-shaped short tube cut to a fixed length is inconsistent with the required inner hole size, ensures the inner hole size of the special-shaped short tube, has a simple structure, is easy to operate, has a good shaping effect, is highly efficient, and provides correction conditions for special-shaped short tubes with larger inner hole sizes.

[0004] The technical solution adopted by the utility model: an internal shaping mold for special-shaped short tubes, comprising a base plate arranged on the workbench of a hydraulic press, a positioning seat being fixed on the upper end surface of the base plate, and the lower end of the special-shaped short tube corresponding to the upper and lower ends of the hydraulic press punch is located above the base plate and positioned and supported on the positioning seat, the upper end pipe mouth of the special-shaped short tube is provided with a shaping block with the same size as the target inner hole, and a push rod clamped on the upper end of the hydraulic press punch is pressed against the shaping block, and the downward-moving hydraulic press punch drives the push rod to press the shaping block from the upper end pipe mouth of the special-shaped short tube to pass through the lower end pipe mouth, so as to achieve the shaping of the inner hole of the special-shaped short tube.

[0005] Wherein, the positioning seat includes a left positioning block and a right positioning block, and the left positioning block and the right positioning block are structures with the same shape and size and are symmetrically arranged, and the left and right ends are respectively fixed to the connecting plates at the rear edge of the upper end surfaces of the left positioning block and the right positioning block to fix the left positioning block and the right positioning block into one body, and the inner side walls of the left positioning block and the right positioning block are provided with multiple positioning platforms with heights decreasing from top to bottom, and the lower end of the special-shaped short tube located between the left positioning block and the right positioning block is positioned on two positioning platforms of the same height under the corresponding width.

[0006] Furthermore, the height between two adjacent positioning platforms on the left positioning block and the right positioning block and the height between the bottommost positioning platform and the bottom plate are not less than the thickness of the correction block.

[0007] Furthermore, the width of the positioning platform is not greater than the wall thickness of the special-shaped short tube.

[0008] Furthermore, chamfers are formed on the edges of the four sides of the lower end of the shape correction block to facilitate pressing it into the interior of the special-shaped short tube.

[0009] Furthermore, a plastic protective film is provided between the upper end surface of the special-shaped short tube and the bottom surface of the correction block.

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

[0011] 1. This technical solution arranges a bottom plate with a positioning seat fixed on the upper end surface on the hydraulic press workbench, and the downward hydraulic press punch drives the push rod to press the correction block from the upper end of the special-shaped short tube to the lower end of the tube, so as to correct the inner hole of the special-shaped short tube, solve the problem that the special-shaped short tube cut to a fixed length is inconsistent with the required inner hole size, and ensure the inner hole size of the special-shaped short tube;

[0012] 2. This technical solution provides positioning support conditions for special-shaped short tubes of different sizes by arranging multiple positioning platforms with decreasing heights from top to bottom on the inner side walls of the left positioning block and the right positioning block, thereby ensuring that the shaping blocks can smoothly enter and exit the special-shaped short tubes for shaping;

[0013] 3. This technical solution has a simple structure, is easy to operate, has a good correction effect, is highly efficient, and has a low cost, and provides correction conditions for special-shaped short tubes with larger inner hole sizes. 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] Internal calibration mold for special-shaped short tubes, such as Figure 1 As shown, it includes a bottom plate 1 arranged on the workbench of the hydraulic press, a positioning seat 2 is fixed on the upper end surface of the bottom plate 1, and the lower end of the special-shaped short tube 3 corresponding to the upper and lower parts of the hydraulic press punch is located above the bottom plate 1 and positioned and supported on the positioning seat 2, and the upper end of the special-shaped short tube 3 is provided with a correction block 4 with the same size as the target inner hole, and the target inner hole refers to the inner hole required by the special-shaped short tube 3, and the target inner hole is slightly larger than the actual inner hole of the special-shaped short tube 3, and the push rod 5 clamped on the hydraulic press punch at the upper end is against the correction block 4, and is moved downward by the hydraulic press. The punch of the press drives the push rod 5 to press the shape correction block 4 from the upper end of the special-shaped short tube 3 to pass through the lower end of the tube, so as to realize the shape correction of the inner hole of the special-shaped short tube 3; in the above structure, a bottom plate 1 with a positioning seat 2 fixed on the upper end surface is arranged on the workbench of the hydraulic press, and the downwardly moved hydraulic press punch drives the push rod 5 to press the shape correction block 4 from the upper end of the special-shaped short tube 3 to pass through the lower end of the tube, so as to realize the shape correction of the inner hole of the special-shaped short tube 3, thereby solving the problem that the special-shaped short tube 3 cut to a fixed length is inconsistent with the required inner hole size, and ensuring the inner hole size of the special-shaped short tube 3;

[0019] The specific structure of the positioning seat 2 is as follows: the positioning seat 2 includes a left positioning block 2-1 and a right positioning block 2-2, the left positioning block 2-1 and the right positioning block 2-2 are structures with the same shape and size and are symmetrically arranged, and the left and right ends are respectively fixed to the connecting plates 2-3 at the rear edge positions of the upper end surfaces of the left positioning block 2-1 and the right positioning block 2-2 to fix the left positioning block 2-1 and the right positioning block 2-2 into one body, and the inner side walls of the left positioning block 2-1 and the right positioning block 2-2 are provided with a plurality of positioning platforms 2-4 whose heights decrease from top to bottom, and the lower end of the special-shaped short tube 3 located between the left positioning block 2-1 and the right positioning block 2-2 is positioned on two positioning platforms 2-4 of the same height under the corresponding width; in the above structure, the setting of a plurality of positioning platforms 2-4 whose heights decrease in sequence provides positioning support conditions for special-shaped short tubes 3 of different sizes, ensuring that the correction block 4 can smoothly enter and exit the special-shaped short tube 3 for correction;

[0020] Among them, the height between the two adjacent positioning platforms 2-4 on the left positioning block 2-1 and the right positioning block 2-2 and the height of the lowest positioning platform 2-4 from the bottom plate 1 are not less than the thickness of the correction block 4. The setting of this size is conducive to the smooth movement of the correction block 4 out of the special-shaped short tube 3, and avoids the lower positioning platform 2-4 from blocking the downward-moving correction block 4; specifically, the width of the positioning platform 2-4 is not greater than the wall thickness of the special-shaped short tube 3, even if the outer edge wall of the positioning platform 2-4 does not exceed the inner hole wall of the corresponding side of the special-shaped short tube 3, thereby ensuring that the correction block 4 moves down smoothly, wherein the sum of the thickness of the correction block 4 and the length of the push rod 5 is not less than the length of the special-shaped short tube 3, so that the correction block 4 entering the special-shaped short tube 3 can be ensured to move out smoothly.

[0021] Since the size of the correction block 4 is the same as the target size of the inner hole required for the special-shaped short tube 3, the outer contour size of the correction block 4 is slightly larger than the inner hole size of the special-shaped short tube 3. In order to ensure that the correction block 4 can smoothly enter the special-shaped short tube 3, chamfers are formed on the edges of the four sides of the lower end of the correction block 4 to facilitate pressing it into the interior of the special-shaped short tube 3.

[0022] In order to reduce scratches on the inner hole wall of the special-shaped short tube 3 caused by friction between the hole wall of the special-shaped short tube 3 and the outer wall of the correction block 4 during the correction process, a plastic protective film 6 is provided between the upper end surface of the special-shaped short tube 3 and the bottom surface of the correction block 4, thereby playing a role in lubrication and friction reduction.

[0023] The technical solution has a simple structure, is easy to operate, has a good correction effect, is high in efficiency, and has a low cost, and provides correction conditions for special-shaped short tubes with larger inner hole sizes.

[0024] 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.

[0025] 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. Internal shaping mold for special-shaped short tubes, characterized by: The invention comprises a base plate (1) arranged on a hydraulic press workbench, a positioning seat (2) being fixed on the upper end surface of the base plate (1), and the lower end of a special-shaped short tube (3) corresponding to the upper and lower ends of the hydraulic press punch is located above the base plate (1) and is positioned and supported on the positioning seat (2), the upper end of the special-shaped short tube (3) is provided with a correction block (4) having the same size as the target inner hole, and a push rod (5) clamped on the upper end of the hydraulic press punch abuts against the correction block (4), and the downwardly moving hydraulic press punch drives the push rod (5) to press the correction block (4) from the upper end of the special-shaped short tube (3) through the lower end, thereby realizing the correction of the inner hole of the special-shaped short tube (3).

2. The inner shaping mold for special-shaped short tubes according to claim 1, characterized in that: The positioning seat (2) comprises a left positioning block (2-1) and a right positioning block (2-2), the left positioning block (2-1) and the right positioning block (2-2) being structures of the same shape and size and symmetrically arranged, and a connecting plate (2-3) whose left and right ends are respectively fixed to the rear edge of the upper end surfaces of the left positioning block (2-1) and the right positioning block (2-2) to integrally connect the left positioning block (2-1) and the right positioning block (2-2), a plurality of positioning platforms (2-4) whose heights decrease from top to bottom are formed on the inner side walls of the left positioning block (2-1) and the right positioning block (2-2), and the lower end of the special-shaped short tube (3) located between the left positioning block (2-1) and the right positioning block (2-2) is positioned on two positioning platforms (2-4) of the same height at a corresponding width.

3. The inner shaping mold for special-shaped short tubes according to claim 2, characterized in that: The height between two adjacent positioning platforms (2-4) on the left positioning block (2-1) and the right positioning block (2-2) and the height between the bottommost positioning platform (2-4) and the bottom plate (1) are not less than the thickness of the shape correction block (4).

4. The inner shaping mold for special-shaped short tubes according to claim 3, characterized in that: The width of the positioning platform (2-4) is no greater than the wall thickness of the special-shaped short tube (3).

5. The inner shaping die for special-shaped short tubes according to claim 1, 2, 3 or 4, characterized in that: The lower end of the shape correction block (4) is provided with chamfers on four sides of the edge thereof to facilitate pressing the shape correction block (4) into the interior of the special-shaped short tube (3).

6. The inner shaping mold for special-shaped short tubes according to claim 5, characterized in that: A plastic protective film (6) is provided between the upper end surface of the special-shaped short tube (3) and the bottom surface of the shape correction block (4).

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