A pressure correction mold

Abstract

This application relates to a pressure straightening die, including a mounting base, on which a pressure straightening die assembly is mounted. The pressure straightening die assembly includes a bottom die and a movable die. The bottom die is detachably connected to the mounting base. Both the bottom die and the movable die are semi-circular and coaxially distributed. The movable die is detachably connected to the bottom die via a locking component. The bottom die is detachably connected to the mounting base, and the movable die is detachably connected to the bottom die via a connecting component. When straightening and changing gauges for steel pipes with different outer diameters is required, only the appropriate movable die needs to be replaced according to the outer diameter requirement of the steel pipe, significantly reducing the number of parts required for die changing. This application has the effect of shortening gauge changing time and improving the overall efficiency of pressure straightening operations.

Description

Technical Field

[0001] This application relates to the field of steel pipe straightening equipment, and in particular to a pressure straightening die. Background Technology

[0002] Pressure straightening is a very common and effective cold working method for correcting the curvature of steel pipes. Its core principle is to use reverse static pressure to apply pressure to the "arch" of the bent steel pipe, causing local plastic deformation, thereby eliminating the original elastic curvature and achieving the purpose of straightening.

[0003] Common pressure straightening equipment typically includes a frame, hydraulic cylinder, pressure straightening die, and support rollers. The support rollers are mounted on the frame and used to support the steel pipe. The hydraulic cylinder is mounted on the frame, and the pressure straightening die is located at the drive end of the hydraulic cylinder. The working surface of the pressure straightening die is usually V-shaped or arc-shaped to match the outer diameter of the steel pipe. During operation, the steel pipe is first measured and positioned, and then the hydraulic cylinder drives the pressure straightening die to apply pressure to the steel pipe to overcome material springback. The straightening process is then repeated until it meets the standard.

[0004] In the aforementioned technologies, the early-stage field pressure straightening molds were made using single-piece casting. Each time the gauge was changed, the entire mold set had to be replaced, and the manufacturing cost of each mold set was high, making the use of the molds extremely inconvenient. Utility Model Content

[0005] To address the inconvenience of changing the entire set of molds during straightening and gauge replacement, this application provides a pressure straightening mold.

[0006] The pressure straightening die provided in this application adopts the following technical solution: A pressure straightening mold includes a mounting base, on which a pressure straightening mold assembly is disposed. The pressure straightening mold assembly includes a bottom mold and a movable mold. The bottom mold is detachably connected to the mounting base. Both the bottom mold and the movable mold are semi-circular arc-shaped and coaxially distributed. The movable mold and the bottom mold are detachably connected by a locking member.

[0007] By adopting the above technical solution, the bottom mold and the mounting base can be detachably connected, and the movable mold can be detachably connected to the bottom mold through the connecting parts. When straightening and changing the gauge for steel pipes with different outer diameters is required, only the appropriate movable mold needs to be replaced according to the outer diameter requirements of the steel pipe, which greatly reduces the number of parts required for mold changing, shortens the gauge changing time, and improves the overall efficiency of pressure straightening operation.

[0008] Optionally, the movable mold includes a first mold and a second mold coaxially distributed, the inner peripheral wall of the first mold abutting against and fitting the outer peripheral wall of the second mold, and the first mold and the second mold being detachably connected by a connector.

[0009] By adopting the above technical solution, the movable mold composed of the first mold and the second mold is more modular. By assembling the first mold and the second mold with different wall thicknesses, it can adapt to the straightening requirements of steel pipes with different outer diameters. At the same time, in some cases, only the matching second mold needs to be replaced, further reducing the number of mold changing parts. The connecting parts are detachable, making the mold changing operation convenient.

[0010] Optionally, the locking component includes a locking screw and a locking nut. Mounting holes are provided at corresponding positions of the first mold, the second mold, and the bottom mold. The locking screw is inserted and connected to the first mold, the second mold, and the bottom mold through the mounting holes. One end of the locking screw is pressed against one side of the second mold, and the locking nut is threaded to one side of the locking screw and presses against one side of the bottom mold.

[0011] By adopting the above technical solution, the locking screw passes through the first mold, the second mold, and the bottom mold through the corresponding mounting holes. With the threaded connection of the locking nut, the first mold, the second mold, and the bottom mold can be fixedly connected. At the same time, the locking operation of the threaded connection is simple, which facilitates the quick disassembly of the three mold components and improves work efficiency.

[0012] Optionally, the connector includes a connecting rod and a connecting nut. The ends of the first mold and the second mold along the axial direction are provided with connecting grooves. The connecting rod is snapped into the first mold and the second mold through the connecting grooves. The two ends of the connecting rod along the length direction are provided with threaded sections. The connecting nut is threadedly connected to the connecting rod at the threaded section. The connecting nuts on both sides are respectively pressed against one side of the first mold and the second mold.

[0013] By adopting the above technical solution, the connecting rod is snapped into the connecting groove, which facilitates the rapid positioning of the first mold and the second mold. At this time, the threaded sections at both ends of the connecting rod cooperate with the connecting nuts to apply abutment from both ends of the first mold and the second mold in the radial direction, clamping and fixing the two molds. When it is necessary to adapt to steel pipes of different diameters, the first mold and the second mold with different wall thicknesses are pre-assembled. When replacement is required, the assembled movable mold is directly replaced and installed, further optimizing the specification change process and reducing the cost of use.

[0014] Optionally, the bottom mold is provided with a guide strip, and the mounting base is provided with a guide groove, wherein the guide strip is slidably connected to the mounting base through the guide groove. By adopting the above technical solution, the sliding cooperation between the guide strip and the guide groove reduces positional displacement during the installation of the bottom mold and ensures the stability of the mold assembly.

[0015] Optionally, the bottom mold is provided with a limiting block, the mounting base is provided with a limiting groove, the limiting block is snapped into the mounting base through the limiting groove, and the limiting block is provided with a limiting bolt for locking with the mounting base.

[0016] By adopting the above technical solution, during installation, the limiting block of the bottom mold engages with the limiting groove of the mounting base, positioning and limiting the bottom mold from the horizontal and vertical directions. The limiting bolts rigidly lock the bottom mold and the mounting base, reducing the probability of the bottom mold loosening due to vibration and pressure impact during long-term operation. The limiting bolts also facilitate the quick assembly and disassembly of the bottom mold.

[0017] Optionally, positioning strips are provided on the outer peripheral wall of the second mold at both ends in the axial direction, and positioning grooves are provided on the inner peripheral wall of the first mold. The positioning strips are inserted and connected to the first mold through the positioning grooves.

[0018] By adopting the above technical solution, the insertion and cooperation of the positioning strip and the positioning groove facilitates the quick and easy alignment of the first mold and the second mold. The positioning strips at both ends limit and position the first mold and the second mold in the axial direction, which is convenient for operation.

[0019] Optionally, the second mold has locking grooves on both its outer and inner peripheral walls. The locking grooves are located at the connecting groove and communicate with it. The connecting nut abuts against one side wall of the locking groove.

[0020] By adopting the above technical solution, the connecting nut abuts against the side wall of the locking groove, and the locking groove limits the nut. The locking groove accommodates the connecting nut, preventing the protruding nut from interfering with the inner peripheral wall of the first mold and the outer peripheral wall of the steel pipe, and reducing the risk of the nut being damaged by collision during operation.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The bottom mold and mounting base, as well as the movable mold and bottom mold, are all detachably connected. When changing the gauge, only the matching movable mold needs to be replaced, which reduces the number of parts required for mold changing, shortens the gauge changing time, and improves the overall efficiency of pressure straightening operations. 2. The first mold and the second mold are assembled to form a movable mold, which has a higher degree of modularity. The first mold and the second mold with different wall thicknesses can be assembled to meet the straightening requirements of steel pipes with different outer diameters. In some cases, only the first mold needs to be replaced, which further reduces the number of mold replacement parts and makes the disassembly and replacement operation convenient. 3. The locking screw and locking nut work together to fix the first mold, the second mold and the bottom mold. The threaded connection makes locking easy and quick, and improves work efficiency. Attached Figure Description

[0022] Figure 1This is a three-dimensional structural diagram of this application.

[0023] Figure 2 This is a schematic diagram of the exploded structure along the vertical direction of this application.

[0024] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0025] Reference numerals in the attached drawings: 1. Mounting base; 11. Guide groove; 12. Limiting groove; 2. Bottom mold; 21. Guide strip; 22. Limiting block; 221. Limiting bolt; 3. Locking component; 31. Locking screw; 32. Locking nut; 4. First mold; 41. Positioning groove; 5. Second mold; 51. Positioning strip; 52. Connecting groove; 53. Locking groove; 54. Mounting hole; 6. Connecting component; 61. Connecting rod; 62. Connecting nut. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings.

[0027] This application discloses a pressure straightening mold, referring to... Figure 1 The system includes a mounting base 1 and a pressure straightening die assembly. The pressure straightening die assembly is mounted on the mounting base 1 and includes a sheet-shaped bottom die 2 and a movable die. The bottom die 2 is detachably connected to the mounting base 1, and its radial cross-section is semi-circular. The movable die is also semi-circular and coaxially distributed with the bottom die 2. The movable die and the bottom die 2 are detachably connected by a locking element 3. A circular space is formed on the inner circumference of the movable die to accommodate the steel pipe to be straightened. When changing gauges for straightening steel pipes with different outer diameters, the movable die is replaced according to the required outer diameter of the steel pipe, significantly reducing the number of parts required for die changing, shortening the gauge change time, and improving the overall efficiency of the pressure straightening operation.

[0028] Reference Figure 1 and Figure 2 A guide bar 21 is provided on the outer peripheral wall of the bottom mold 2 in a direction parallel to the axis. A guide groove 11 is provided on the mounting base 1. The guide bar 21 is slidably connected to the mounting base 1 through the guide groove 11. The guide bar 21 can play a guiding role when the bottom mold 2 is installed, reducing the possibility of positional deviation when the bottom mold 2 is installed.

[0029] Reference Figure 2The bottom mold 2 is provided with a limiting block 22, and the mounting base 1 is provided with a limiting groove 12. The limiting block 22 is snapped into the mounting base 1 through the limiting groove 12, and the limiting block 22 is provided with a limiting bolt 221 for locking with the mounting base 1. The cooperation between the limiting block 22 and the limiting groove 12 can position and limit the bottom mold 2 from the lateral and longitudinal directions. When installing the bottom mold 2, the limiting block 22 is first snapped into the limiting groove 12, and then the limiting bolt 221 is used to lock the limiting block 22 to the mounting base 1, which facilitates the quick assembly and disassembly of the bottom mold 2.

[0030] Reference Figure 2 The movable mold includes a first mold 4 and a second mold 5 coaxially distributed. The inner peripheral wall of the first mold 4 abuts against the outer peripheral wall of the second mold 5, and the first mold 4 and the second mold 5 are detachably connected by a connector 6. The first mold 4 and the second mold 5 can be designed with different wall thicknesses. By assembling the first mold 4 and the second mold 5 with different wall thicknesses, it can adapt to the straightening requirements of steel pipes with different outer diameters. In some cases, only the appropriate second mold 5 needs to be replaced to meet the straightening requirements of steel pipes with different outer diameters, further reducing the number of mold changing parts. At the same time, multiple molds can also be stacked and used according to actual conditions to expand the adaptability range.

[0031] Reference Figure 2 Positioning strips 51 are provided on the outer peripheral wall of the second mold 5 at both ends in the axial direction. The positioning strips 51 are distributed along the arc direction of the second mold 5. Positioning grooves 41 are provided on the inner peripheral wall of the first mold 4. The positioning strips 51 are inserted and connected to the first mold 4 through the positioning grooves 41. The same positioning strips 51 are provided on the outer peripheral wall of the first mold 4. The same positioning grooves 41 are provided on the bottom mold 2. The positioning strips 51 and positioning grooves 41 can facilitate and quickly achieve alignment between the first mold 4 and the second mold 5, and between the first mold 4 and the bottom mold 2.

[0032] Reference Figure 2 The connector 6 includes a connecting rod 61 and a connecting nut 62. The ends of the first mold 4 and the second mold 5 along the axial direction are provided with connecting grooves 52 and locking grooves 53. The connecting grooves 52 are distributed radially along the first mold 4 and the second mold 5. The connecting rod 61 is snapped into the first mold 4 and the second mold 5 through the connecting grooves 52. The locking grooves 53 are provided on one side of the connecting grooves 52 and communicate with the connecting grooves 52. The outer and inner peripheral walls of the first mold 4 and the second mold 5 are provided with locking grooves 53. Two adjacent locking grooves 53 on the first mold 4 are located on the inner peripheral wall and the outer peripheral wall, respectively. The locking grooves 53 on the second mold 5 are distributed relatively to the locking grooves 53 on the first mold 4.

[0033] Reference Figure 2The connecting rod 61 has threaded sections at both ends along its length. Connecting nuts 62 are threaded to the connecting rod 61 at these threaded sections. The connecting nuts 62 on both sides abut against one side of the bottom wall of the locking groove 53 of the first mold 4 and the second mold 5, respectively. A washer is provided on one side of each connecting nut 62. During assembly, the connecting rod 61 is first inserted into the connecting groove 52, and then the connecting nuts 62 are screwed onto the threaded sections of the connecting rod 61. Tightening the connecting nuts 62 ensures that the connecting nuts 62 abut against one side of the first mold 4 and the second mold 5, thereby clamping and fixing the first mold 4 and the second mold 5. The locking groove 53 serves to limit the movement of the connecting nuts 62, preventing the protruding nuts from interfering with the inner circumferential wall of the first mold 4 and the outer circumferential wall of the steel pipe. The shape and size of the locking groove 53 are designed according to the size of the connecting nuts 62, ensuring that the connecting nuts 62 fit perfectly within the locking groove 53. The bottom mold 2 is also provided with a connecting groove 52 and a locking groove 53 corresponding to the position of the first mold 4. The bottom mold 2 and the first mold 4 are locked together by the connecting rod 61 and the connecting nut 62.

[0034] Reference Figure 2 The locking component 3 includes a locking screw 31 and a locking nut 32. The locking screw 31 is located at both ends along the axis of the bottom mold 2. The first mold 4, the second mold 5, and the bottom mold 2 each have a radially penetrating mounting hole 54 at their corresponding positions. The locking screw 31 is inserted into and connected to the first mold 4, the second mold 5, and the bottom mold 2 through the mounting holes 54. One end of the locking screw 31 abuts against one side of the second mold 5. The locking nut 32 is threaded to one side of the locking screw 31 and abuts against one side of the bottom mold 2. A washer is provided on one side of the locking nut 32, enabling quick and easy fixed connection between the first mold 4, the second mold 5, and the bottom mold 2. When it is necessary to disassemble the molds, simply loosen the locking nut 32 to remove the locking screw 31.

[0035] The implementation principle of a pressure straightening mold according to an embodiment of this application is as follows: First, align the guide strip 21 on the bottom mold 2 with the guide groove 11 on the mounting base 1, so that the guide strip 21 slides in the guide groove 11, and insert the limiting block 22 on the bottom mold 2 into the limiting groove 12 on the mounting base 1. Use the limiting bolt 221 to lock the limiting block 22 with the mounting base 1 to complete the installation of the bottom mold 2.

[0036] Insert the positioning strip 51 on the outer peripheral wall of the second mold 5 into the positioning groove 41 on the inner peripheral wall of the first mold 4, and insert the connecting rod 61 into the connecting groove 52 at the axial end of the first mold 4 and the second mold 5 to achieve positioning of the first mold 4 and the second mold 5. Tighten the connecting nut 62 on the connecting rod 61, and the connecting nuts 62 on both sides abut against one side of the first mold 4 and the second mold 5 respectively to clamp and fix the first mold 4 and the second mold 5.

[0037] Place the assembled movable mold on the bottom mold 2, aligning the mounting holes 54 at corresponding positions on the first mold 4, the second mold 5, and the bottom mold 2. Connect the locking screw 31 through the mounting holes 54 to the first mold 4, the second mold 5, and the bottom mold 2, ensuring one end of the locking screw 31 abuts against one side of the second mold 5. Finally, thread the locking nut 32 onto one side of the locking screw 31 and abut against one side of the bottom mold 2, thus achieving a fixed connection between the first mold 4, the second mold 5, and the bottom mold 2.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pressure straightening mold, comprising a mounting base (1), wherein a pressure straightening mold assembly is disposed on the mounting base (1), characterized in that: The pressure correction mold assembly includes a bottom mold (2) and a movable mold. The bottom mold (2) is detachably connected to the mounting base (1). The bottom mold (2) and the movable mold are both semi-circular arc-shaped and coaxially distributed. The movable mold and the bottom mold (2) are detachably connected by a locking member (3).

2. The pressure straightening die according to claim 1, characterized in that: The movable mold includes a first mold (4) and a second mold (5) coaxially distributed. The inner peripheral wall of the first mold (4) abuts against and fits against the outer peripheral wall of the second mold (5). The first mold (4) and the second mold (5) are detachably connected by a connector (6).

3. The pressure straightening mold according to claim 2, characterized in that: The locking component (3) includes a locking screw (31) and a locking nut (32). Mounting holes (54) are provided at corresponding positions of the first mold (4), the second mold (5) and the bottom mold (2). The locking screw (31) is inserted and connected to the first mold (4), the second mold (5) and the bottom mold (2) through the mounting holes (54). One end of the locking screw (31) is pressed against one side of the second mold (5). The locking nut (32) is threaded to one side of the locking screw (31) and pressed against one side of the bottom mold (2).

4. A pressure straightening die according to claim 2, characterized in that: The connector (6) includes a connecting rod (61) and a connecting nut (62). The ends of the first mold (4) and the second mold (5) in the axial direction are provided with connecting grooves (52). The connecting rod (61) is snapped into the first mold (4) and the second mold (5) through the connecting grooves (52). The two ends of the connecting rod (61) in the length direction are provided with threaded sections. The connecting nut (62) is threaded into the connecting rod (61) at the threaded section. The connecting nuts (62) on both sides are respectively pressed against one side of the first mold (4) and the second mold (5).

5. A pressure straightening die according to claim 1, characterized in that: The bottom mold (2) is provided with a guide strip (21), and the mounting base (1) is provided with a guide groove (11). The guide strip (21) is slidably connected to the mounting base (1) through the guide groove (11).

6. A pressure straightening die according to claim 1, characterized in that: The bottom mold (2) is provided with a limiting block (22), and the mounting base (1) is provided with a limiting groove (12). The limiting block (22) is connected to the mounting base (1) through the limiting groove (12). The limiting block (22) is provided with a limiting bolt (221) for locking with the mounting base (1).

7. A pressure straightening die according to claim 2, characterized in that: The second mold (5) has positioning strips (51) on its outer peripheral wall and at both ends in the axial direction. The first mold (4) has positioning grooves (41) on its inner peripheral wall. The positioning strips (51) are connected to the first mold (4) by means of the positioning grooves (41).

8. A pressure straightening die according to claim 4, characterized in that: The second mold (5) has locking grooves (53) on both its outer and inner peripheral walls. The locking grooves (53) are located at the connecting groove (52) and communicate with it. The connecting nut (62) abuts against one side wall of the locking groove (53).

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