A steel pipe straightening device

Abstract

The utility model provides a kind of steel pipe shaping device, belong to damper processing equipment field, including upper die and lower die, upper die and lower die form shaping cavity after resistance, when upper die moves down make the deformation of oil storage cylinder in shaping cavity, it is characterized by: still include;Core shaft, core shaft outer surface is placed in shaping cavity after being equipped with oil storage cylinder, oil storage cylinder inner surface and core shaft outer surface are in contact, shaping cavity inner surface and oil storage cylinder outer surface are in contact, the utility model is applicable to the shaping operation to the outer surface of oil storage cylinder, by placing core shaft in oil storage cylinder, shaping groove is set on core shaft, using upper die to press down makes the bottom surface of oil storage cylinder inner surface and shaping groove be in contact, complete shaping, because there is the limit of core shaft, can avoid the shape of oil storage cylinder shaping to cause shape not same.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper processing equipment, specifically to a steel pipe shaping device. Background Technology

[0002] In the field of cylinder shaping and other press fitting, press fitting molds are mainly used to shape workpieces such as steel pipes to achieve specific shape and size requirements.

[0003] Currently, the press-fitting dies used in this field are mandrel-less structures. In practical applications, this type of mandrel-less press-fitting die, lacking a mandrel as internal support, cannot provide effective support and positioning for the inside of the steel pipe during press-fitting. When the hydraulic cylinder drives the press head to apply pressure to the steel pipe, the lack of stable internal support results in uneven stress distribution during the pressing process.

[0004] This leads to inconsistent shapes in the pressed steel pipes, such as varying degrees of flattening in different areas, making it impossible to achieve a uniform shape. Simultaneously, dimensional deviations can be excessive, failing to meet precise dimensional requirements. These problems severely impact the processing quality and performance of the steel pipes, resulting in products that do not meet relevant standards and practical application needs, increasing scrap rates and costs in the production process, and reducing production efficiency. Utility Model Content

[0005] In view of this, the present invention provides a steel pipe shaping device, which can be made by placing a mandrel in an oil storage cylinder, opening a shaping groove on the mandrel, and using an upper mold to press down to make the inner surface of the oil storage cylinder abut against the bottom surface of the shaping groove, thereby completing the shaping. Because of the limiting effect of the mandrel, it can avoid the oil storage cylinder from having different shapes during shaping.

[0006] To solve the above-mentioned technical problems, this utility model provides a steel pipe shaping device. The existing structure includes an upper mold and a lower mold. The upper mold and the lower mold form a shaping cavity after they come into contact. The mold to be shaped is placed in the shaping cavity. When the upper mold moves down, the oil storage cylinder in the shaping cavity is deformed. However, when the oil storage cylinder is shaped, there is no support in the oil storage cylinder, which can easily lead to different shapes when the oil storage cylinder is shaped.

[0007] By placing a mandrel inside the oil reservoir, and then fitting the oil reservoir onto the outer surface of the mandrel before placing it in the shaping cavity, the inner surface of the oil reservoir and the outer surface of the mandrel are in contact, as are the inner surface of the shaping cavity and the outer surface of the oil reservoir. The mandrel supports the oil reservoir, preventing uneven stress during the shaping process. The end of the mandrel near the hinge seat has a positioning ring, which is threaded to the mandrel. Rotating the positioning ring causes the end of the oil reservoir near the hinge seat to contact the end face of the positioning element away from the hinge seat, accurately defining the position of the oil reservoir on the mandrel and preventing displacement during operation, thus ensuring the accurate positioning of the oil reservoir during shaping.

[0008] The outer surface of the mandrel has shaping grooves with a V-shaped or rectangular cross-section. These grooves extend towards the mandrel axis and have a protruding point or a protruding horizontal surface at the end furthest from the mandrel axis. The V-shaped or rectangular groove cross-section provides a specific shaping profile for the oil reservoir, allowing it to form the corresponding shape under pressure. The protruding point or horizontal surface can apply greater pressure to specific parts of the oil reservoir during the shaping process, serving to position or form key structures.

[0009] The mandrel has a two-section, split structure, connected magnetically. This split mandrel has a contact plane that is flush with the protruding point and connects to the horizontal plane. The contact plane is perpendicular to the protruding point and horizontal to the protruding horizontal plane. This two-section structure facilitates the removal of the oil reservoir from the mandrel after shaping. The positional relationship between the contact plane, the protruding point, and the protruding horizontal plane ensures the positioning accuracy of the mandrel within the shaping cavity, maintaining stability during operation and thus guaranteeing the accuracy of the oil reservoir shaping.

[0010] The bottom of the shaping groove is horizontally oriented, while the two ends are angled and extend towards the outer surface of the mandrel. The horizontal bottom allows the oil reservoir to form a flat surface at this location, while the angled ends guide the oil reservoir to flow into the groove under pressure, facilitating the filling of the entire groove and ensuring the shaping effect.

[0011] One end of the mandrel is connected to the hinge seat, allowing the mandrel to rotate around the hinge seat. This gives the mandrel a certain degree of freedom of movement during operation, making it easier for the mandrel to adjust according to the deformation of the oil reservoir when the upper mold is pressed down. It also facilitates the installation and disassembly of the mandrel.

[0012] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0013] 1. Avoid inconsistent shapes: By placing a mandrel inside the oil reservoir and using the mandrel to support the oil reservoir, uneven force on the oil reservoir can be prevented during the shaping process, thus avoiding inconsistent shapes during shaping.

[0014] 2. Accurate positioning of the oil reservoir cylinder: The positioning ring at the end of the mandrel near the hinge seat is connected to the mandrel by a thread. Rotating the positioning ring can make the end of the oil reservoir cylinder near the hinge seat abut against the end face of the positioning part away from the hinge seat, which can accurately limit the position of the oil reservoir cylinder on the mandrel, prevent it from shifting during operation, and ensure accurate shaping position.

[0015] 3. Provides specific shaping profile: The shaping groove on the outer surface of the mandrel has a V-shaped or rectangular cross section, which can provide a specific shaping profile for the material, so that the material can form a corresponding shape when it is compressed. The protruding point or protruding horizontal surface at the end of the groove away from the mandrel axis can apply greater pressure to specific parts of the material during shaping, playing a role in positioning or forming key structures.

[0016] 4. Easy to remove and place the oil reservoir: The mandrel has a two-section split structure and is connected by magnetic attraction, which makes it easy to remove the oil reservoir from the mandrel after the oil reservoir is shaped. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of a steel pipe shaping device according to the present invention;

[0018] Figure 2 This is a cross-sectional view of the shaping groove of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Upper mold; 2. Lower mold; 3. Mandrel; 4. Shaping groove; 5. Hinge seat; 6. Positioning ring; 7. Fitting plane. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-2 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0021] In the existing mold forming structure, there are an upper mold 1 and a lower mold 2. When the upper mold 1 and the lower mold 2 abut against each other, a forming cavity is formed. The mold to be formed is placed in this forming cavity, and when the upper mold 1 moves downward, the oil reservoir inside the forming cavity deforms. However, when forming the oil reservoir, because there are no supporting components inside the oil reservoir, the oil reservoir is prone to inconsistent shape during the forming process.

[0022] like Figure 1-2 As shown:

[0023] This embodiment provides a steel pipe shaping device. A mandrel 3 is placed inside an oil reservoir. First, the oil reservoir is fitted onto the outer surface of the mandrel 3, and then the mandrel 3 with the oil reservoir fitted is placed together in a shaping cavity. The inner surface of the oil reservoir abuts against the outer surface of the mandrel 3, while the inner surface of the shaping cavity abuts against the outer surface of the oil reservoir. The mandrel 3 supports the oil reservoir, effectively preventing uneven stress on the oil reservoir during the shaping process.

[0024] A positioning ring 6 is provided at one end of the mandrel 3 near the hinge seat 5, and the positioning ring 6 is threadedly connected to the mandrel 3. When the positioning ring 6 is rotated to bring the surface of the oil reservoir to the required shaping position, the end of the oil reservoir near the hinge seat 5 will abut against the end face of the positioning element away from the hinge seat 5. This accurately limits the position of the oil reservoir on the mandrel 3, preventing displacement of the oil reservoir during operation and ensuring the accuracy of the oil reservoir shaping position.

[0025] The outer surface of the mandrel 3 is provided with a shaping groove 4, the cross-section of which is V-shaped or rectangular. The shaping groove 4 extends towards the axis of the mandrel 3 and has a protruding point or a protruding horizontal surface at the end away from the axis of the mandrel 3. The V-shaped or rectangular groove cross-section shape can provide a specific shaping profile for the oil reservoir cylinder, so that the oil reservoir cylinder can form a corresponding shape when under pressure; the protruding point or the protruding horizontal surface can apply greater pressure to specific parts of the oil reservoir cylinder during the shaping process, playing a role in positioning or shaping key structures.

[0026] The mandrel 3 adopts a two-section split structure. This split structure of the mandrel 3 is connected by magnetic attraction. The two-section split structure design allows the oil reservoir to be easily removed from the mandrel 3 after the oil reservoir is shaped. The split structure of the mandrel 3 has a mating plane 7, which is on the same plane as the protrusion point. The mating plane 7 is connected to the horizontal plane, and is perpendicular to the protrusion point and horizontal to the protrusion horizontal plane. The positional relationship between the mating plane 7, the protrusion point, and the protrusion horizontal plane ensures the positioning accuracy of the mandrel 3 in the shaping cavity, keeps the mandrel 3 stable during operation, and thus ensures the accuracy of the oil reservoir shaping.

[0027] The bottom of the shaping groove 4 is horizontal, while the two ends are inclined and extend towards the outer surface of the mandrel 3. The horizontal bottom allows the oil reservoir to form a flat surface in this area, while the inclined ends guide the oil reservoir to flow into the groove when under pressure. This facilitates the oil reservoir to fill the entire groove, thereby ensuring the shaping effect.

[0028] One end of the mandrel 3 is connected to the hinge seat 5, allowing the mandrel 3 to rotate around the hinge seat 5. This rotational function of the mandrel 3 provides it with a certain degree of freedom of movement during operation. Thus, when the upper mold 1 is pressed down, the mandrel 3 can adjust accordingly based on the deformation of the oil reservoir, and it also facilitates the installation and disassembly of the mandrel 3.

[0029] Working principle: After the oil reservoir cylinder is fitted onto the outer surface of the mandrel 3, it is placed in the shaping cavity formed by the contact of the upper mold 1 and the lower mold 2, so that the inner surface of the oil reservoir cylinder contacts the outer surface of the mandrel 3, and the inner surface of the shaping cavity contacts the outer surface of the oil reservoir cylinder. The mandrel 3 is rotatable and connected by a hinge seat 5. The positioning ring 6 near the hinge seat 5 is threadedly connected to the mandrel 3. Rotating the positioning ring 6 can make one end of the oil reservoir cylinder contact the end face of the positioning part for accurate positioning. The outer surface of the mandrel 3 has a shaping groove 4 with a V-shaped or rectangular cross section, extending towards the axis and having a protrusion point or protruding horizontal surface at the end away from the axis. The two-section split structure of the mandrel 3 is connected by magnetic attraction, and its contact plane 7 has a specific positional relationship with the protrusion point or protruding horizontal surface to ensure positioning accuracy. When the upper mold 1 moves down, the mandrel 3 provides internal support to the oil storage cylinder to prevent uneven force on it. At the same time, the shaping groove 4 guides the inner surface of the oil storage cylinder to contact the bottom surface of the groove. The structure of the groove bottom being horizontal and the two ends being inclined facilitates the shaping of the outer wall of the oil storage cylinder, thereby completing the shaping operation of the outer surface of the oil storage cylinder and avoiding its inconsistent shape.

[0030] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A steel pipe shaping device, comprising an upper mold (1) and a lower mold (2), wherein the upper mold (1) and the lower mold (2) abut against each other to form a shaping cavity, and when the upper mold (1) moves downward, the oil storage cylinder in the shaping cavity deforms, characterized in that: Also includes; The mandrel (3) is placed in the shaping cavity after an oil reservoir is fitted onto its outer surface. The inner surface of the oil reservoir abuts against the outer surface of the mandrel (3), and the inner surface of the shaping cavity abuts against the outer surface of the oil reservoir. The outer surface of the mandrel (3) has a shaping groove (4), the cross section of the shaping groove (4) is V-shaped or rectangular, the shaping groove (4) extends towards the axis of the mandrel (3), and the end of the shaping groove (4) away from the axis of the mandrel (3) has a protruding point or protruding horizontal surface; The mandrel (3) is a two-section split structure. The two-section split mandrel (3) has a mating plane (7). The mating plane (7) is on the same plane as the protrusion and is connected to the horizontal plane.

2. The steel pipe shaping device as described in claim 1, characterized in that: The fitting plane (7) is perpendicular to the protruding point.

3. The steel pipe shaping device as described in claim 2, characterized in that: The fitting plane (7) and the protruding horizontal plane are set horizontally.

4. The steel pipe shaping device as described in claim 2, characterized in that: The bottom of the shaping groove (4) is horizontally arranged, and the two ends of the shaping groove (4) are inclined and extend to the outer surface of the mandrel (3).

5. A steel pipe shaping device as described in claim 1 or 2, characterized in that: One end of the spindle (3) is connected to the hinge seat (5), and the spindle (3) can rotate around the hinge seat (5).

6. The steel pipe shaping device as described in claim 5, characterized in that: The mandrel (3) has a positioning ring (6) at one end near the hinge seat (5), and the end of the oil reservoir near the hinge seat (5) abuts against the end face of the positioning ring (6) away from the hinge seat (5).

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