Pipe fitting shape correcting tool

Abstract

The utility model relates to the field of pipe fitting forming, in particular to a pipe fitting shape correcting tool which comprises an outer frame support, a clamping plate assembly, a punch and a jack. The clamping plate assembly comprises a lower clamping plate and an upper clamping plate, a semicircular first arc-shaped groove is formed in the top face of the lower clamping plate, a semicircular second arc-shaped groove is formed in the bottom face of the upper clamping plate, and an opening penetrating through the top of the upper clamping plate to the second arc-shaped groove is formed in the top of the upper clamping plate. The lower clamping plate and the upper clamping plate are oppositely combined to form a circular cavity used for being attached to the outer wall of the pipe fitting, and the opening is formed in the top of the circular cavity. The lower end face of the punch is provided with an arc-shaped end face matched with the opening of the circular cavity, the punch extends into the circular-arc-shaped cavity through the opening of the upper clamping plate, and the arc-shaped end face at the bottom of the punch is placed at the opening and used for completely sealing and wrapping the outer wall of the pipe fitting. The upper end of the punch is connected with the telescopic end of the jack, and the upper end of the jack is fixed to the outer frame support.

Description

Technical Field

[0001] The utility model relates to the field of pipe fitting molding, in particular to a pipe fitting shaping tool. Background Art

[0002] Residual stress will be introduced into pipe fittings due to welding and machining, which will cause the pipe fittings to deform due to stress release when the finished product is placed statically.

[0003] If the inner hole of the pipe fitting is out of tolerance and cannot be repaired, it is generally shaped using a shaping tool. After shaping, the size of the out-of-tolerance part will meet the expected requirements, but other directions will be deformed, especially the vertical size is seriously out of tolerance. The roundness of the inner hole cannot be controlled at all, and the outer surface of the workpiece will be damaged. Summary of the invention

[0004] In order to overcome the above problems, the purpose of the utility model is to provide a pipe shaping device, during which the pipe is restricted from deformation in all directions when subjected to force, and the shaped pipe meets the requirements.

[0005] A pipe shaping tool, characterized in that it includes an outer frame bracket, a clamping plate assembly, a punch and a jack; the clamping plate assembly includes a lower clamping plate and an upper clamping plate, the top surface of the lower clamping plate is provided with a semicircular first arc groove, the bottom surface of the upper clamping plate is provided with a semicircular second arc groove, and the top of the upper clamping plate is provided with an opening that passes through the top of the upper clamping plate to the second arc groove, the lower clamping plate and the upper clamping plate are combined to form a circular cavity for fitting with the outer wall of the pipe fitting, and the opening is arranged in the circular The top of the cavity; the lower end face of the punch has an arc-shaped end face matching the opening of the circular cavity, the punch extends into the circular cavity through the opening of the upper clamp, and the arc-shaped end face at the bottom of the punch is placed at the opening to completely close and cover the outer wall of the pipe fitting; the upper end of the punch is connected to the telescopic end of the jack, and the upper end of the jack is fixed to the outer frame bracket, and the downward pressure of the jack drives the punch to press vertically downward, so that the punch applies a downward force to the pipe fitting to complete the pipe fitting correction.

[0006] As a preferred embodiment, the punch includes a blocking portion and an extension portion, the extension portion fits with the opening, the upper end of the extension portion extends horizontally outward to form the blocking portion, and a gap is left between the lower surface of the blocking portion and the upper surface of the upper clamp for the punch to press down, and the thickness of the gap is the maximum depth of the punch pressing down.

[0007] As a preferred solution, the pipe shaping tool further includes a gasket, which is arranged at the gap, and the difference between the gap and the gasket thickness is the maximum depth of the punch pressing down.

[0008] As a preferred solution, a groove for accommodating the telescopic end of the jack is provided in the middle of the top surface of the blocking portion of the punch, and the groove matches the shape of the end of the telescopic end of the jack.

[0009] As a preferred solution, the outer frame bracket is rectangular, the clamping plate assembly is placed at the bottom of the outer frame bracket, and the jack is arranged at the top of the outer frame bracket.

[0010] As a preferred solution, the clamping plate assembly further includes bolts, and mounting holes are provided on both sides of the lower clamping plate and both sides of the upper clamping plate. After the lower clamping plate and the upper clamping plate are matched, they are fixed by the mounting holes and the bolts.

[0011] The advantages of the utility model are:

[0012] (1) The pipe shaping tool of the utility model forms a circular cavity for fitting with the outer wall of the pipe by matching the lower clamp and the upper clamp. The opening is set at the top of the circular cavity, and a punch is set at the opening to completely close and cover the outer wall of the pipe. The pipe is restricted from deformation in all directions when subjected to force. Compared with the traditional pipe shaping tool, it does not cover the pipe to be shaped. After the downward pressure is reached during the shaping process, the horizontal dimension will be out of tolerance, affecting the shaping effect. The pipe shaping tool of the utility model adopts a full covering method. The circular cavity of the pipe shaping tool is consistent with the surface of the pipe to be shaped, which limits the horizontal force of the workpiece and avoids the horizontal dimension out of tolerance caused by shaping.

[0013] (2) The utility model provides a gasket and adjusts the thickness of the gasket to control the downward pressure of the punch. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of the pipe shaping tooling of the utility model;

[0015] Figure 2 for Figure 1 AA section view;

[0016] Figure 3 for Figure 1 Schematic diagram of the structure of the middle punch;

[0017] Figure 4 for Figure 1 Schematic diagram of the structure of the middle and upper splint;

[0018] Figure 5 for Figure 4 BB cross-sectional view;

[0019] Figure 6 for Figure 1 Schematic diagram of the structure of the middle and lower splints;

[0020] In the figure, the outer frame bracket 10, the clamping plate assembly 20, the upper clamping plate 21, the lower clamping plate 22, the first arc-shaped groove 23, the second arc-shaped groove 24, the opening 25, the circular cavity 26, the bolt 27, the mounting hole 28, the punch 30, the arc-shaped end face 31, the blocking portion 32, the insertion portion 33, the groove 34, the jack 40, the gap 50, and the gasket 60. DETAILED DESCRIPTION

[0021] In order to better understand the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific examples.

[0022] Example

[0023] Combination Figure 1 As shown, the pipe shaping tool of this embodiment includes an outer frame bracket 10, a clamping plate assembly 20, a punch 30, a gasket 60 and a jack 40;

[0024] Among them combined Figure 4 , Figure 5 and Figure 6 As shown, the clamping plate assembly 20 includes a lower clamping plate 22 and an upper clamping plate 21, and a bolt 27. The top surface of the lower clamping plate 22 is provided with a semicircular first arc groove 23, the bottom surface of the upper clamping plate 21 is provided with a semicircular second arc groove 24, and the top of the upper clamping plate 21 is provided with an opening 25 that passes through the top of the upper clamping plate 21 to the second arc groove 24. Figure 2 As shown, the lower clamping plate 22 and the upper clamping plate 21 are matched and fixed through the mounting holes 28 and the bolts 27 to form a circular cavity 26 for fitting with the outer wall of the pipe fitting, and the opening 25 is arranged at the top of the circular cavity 26;

[0025] Combination Figure 2 and Figure 3 As shown, the punch 30 includes a blocking portion 32 and an extension portion 33, the extension portion 33 is matched with the opening 25, and the upper end of the extension portion 33 extends horizontally outward to form the blocking portion 32, and a groove 34 for placing the telescopic end of the jack 40 is provided in the middle of the top surface of the blocking portion 32 of the punch 30, and the groove 34 is matched with the shape of the telescopic end of the jack 40, and a gap 50 for pressing the punch 30 is reserved between the lower surface of the blocking portion 32 and the upper surface of the upper clamp 21, and the gasket 60 is arranged at the gap 50, and the difference in thickness between the gap 50 and the gasket 60 is the maximum depth of pressing of the punch 30, and the depth of pressing of the punch 30 is controlled by adjusting the thickness of the gasket 60.

[0026] Combination Figure 1 and Figure 2 As shown, the outer frame bracket 10 is rectangular, the clamping plate assembly 20 is placed at the bottom of the outer frame bracket 10 , and the jack 40 is arranged at the top of the outer frame bracket 10 .

[0027] Combination Figure 1 and Figure 2 As shown, the process of shaping a pipe using the pipe shaping tool of this embodiment is as follows:

[0028] First, assemble the pipe shaping tool of this embodiment, place the clamping plate assembly 20 in the outer frame bracket 10, install the punch 30 and the gasket 60, place the telescopic end of the jack 40 in the groove 34 of the punch 30, and fix the fixed end of the jack 40 to the outer frame bracket 10 by bolts;

[0029] Then the shaped portion of the pipe to be shaped is inserted into the circular cavity 26 of the clamp assembly 20, fixed with four bolts 27, the pipe is clamped, the punch 30 is inserted through the opening 25 and the gasket 60 is placed on the upper surface of the upper clamp 21;

[0030] Finally, align the pipe shaping tooling horizontally and place it. First, measure the size of the position where the inner hole of the workpiece to be shaped exceeds the tolerance. The size is measured in four directions with a micrometer. Start the jack 40. The jack 40 presses down to drive the punch 30 to press vertically, so that the punch 30 applies a downward force to the pipe fitting. The pressure of each downward pressure of the jack is an integer reading. After each downward pressure, the inner diameter size should be measured and compared with all previous sizes to determine the next pressure increment until the downward pressure size exceeds the target requirement, and the pressure is kept static for a certain period of time. During this period, the inner diameter size should be measured for a fixed period of time.

[0031] After standing for a certain period of time, the pressure should be removed to let the workpiece be in a natural state. The internal stress will cause the workpiece size to rebound. After rebounding, check whether the size can meet the target requirements. The natural state requirement is not less than 10 hours. If the workpiece size does not meet the target effect after inspection, it can be calibrated again, reducing the thickness of the gasket 60, increasing the depth of the punch 30, and completing the calibration again according to the calibration procedure until the rebound size meets the target requirements.

Claims

1. A pipe shaping tool, characterized in that: It comprises an outer frame bracket (10), a clamping plate assembly (20), a punch (30) and a jack (40); The clamping plate assembly (20) comprises a lower clamping plate (22) and an upper clamping plate (21), the top surface of the lower clamping plate (22) is provided with a semicircular first arc-shaped groove (23), the bottom surface of the upper clamping plate (21) is provided with a semicircular second arc-shaped groove (24), and the top of the upper clamping plate (21) is provided with an opening (25) that passes through the top of the upper clamping plate (21) to the second arc-shaped groove (24), the lower clamping plate (22) and the upper clamping plate (21) are matched to form a circular cavity (26) for fitting with the outer wall of the pipe fitting, and the opening (25) is arranged at the top of the circular cavity (26); The lower end face of the punch (30) has an arc-shaped end face (31) matching the opening (25) of the circular cavity (26); the punch (30) extends into the circular cavity (26) through the opening (25) of the upper clamping plate (21); the arc-shaped end face (31) at the bottom of the punch (30) is placed at the opening (25) to completely seal and cover the outer wall of the pipe fitting; The upper end of the punch (30) is connected to the telescopic end of the jack (40), and the upper end of the jack (40) is fixed to the outer frame bracket (10). The jack (40) presses down to drive the punch (30) to press down vertically, so that the punch (30) applies a downward force to the pipe fitting to complete the pipe fitting shaping.

2. The pipe shaping tool according to claim 1, characterized in that: The punch (30) comprises a blocking portion (32) and an insertion portion (33), wherein the insertion portion (33) fits with the opening (25), and the upper end of the insertion portion (33) extends horizontally outward to form the blocking portion (32), and a gap (50) for pressing the punch (30) downward is reserved between the lower surface of the blocking portion (32) and the upper surface of the upper clamping plate (21), and the thickness of the gap (50) is the maximum depth of pressing of the punch (30).

3. The pipe shaping tool according to claim 2, characterized in that: The pipe fitting shaping tool further comprises a gasket (60), wherein the gasket (60) is arranged at the gap (50), and the difference in thickness between the gap (50) and the gasket (60) is the maximum depth of the punch (30) pressing down.

4. The pipe shaping tool according to claim 2, characterized in that: A groove (34) for accommodating the telescopic end of the jack (40) is provided in the middle of the top surface of the blocking portion (32) of the punch (30), and the groove (34) matches the shape of the telescopic end of the jack (40).

5. The pipe shaping tool according to claim 1, characterized in that: The outer frame bracket (10) is rectangular, the clamping plate assembly (20) is placed at the bottom of the outer frame bracket (10), and the jack (40) is arranged at the top of the outer frame bracket (10).

6. The pipe shaping tool according to claim 1, characterized in that: The clamping plate assembly (20) further comprises bolts (27), and mounting holes (28) are provided on both sides of the lower clamping plate (22) and both sides of the upper clamping plate (21). After the lower clamping plate (22) and the upper clamping plate (21) are matched, they are fixed by the mounting holes (28) and the bolts (27).

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