Variable pipe flanging die

Abstract

The utility model relates to a variable pipe flanging die which comprises an upper die and a lower die, the top of a forming protrusion of the lower die is a horizontally-arranged lower die forming plane, an assembling groove is formed in the lower die forming plane, and a guide rod is assembled in the assembling groove in a floating mode in the vertical direction through a guide rod spring. A left side positioning flat plate and a right side positioning flat plate are hinged to the top of the guide rod, a positioning concave part with an upward notch is formed between the left side positioning flat plate and the right side positioning flat plate, and supporting parts used for supporting the ends of the corresponding positioning flat plates are arranged in the assembling grooves. And the upper plate surfaces of the left side positioning flat plate and the right side positioning flat plate are flush with the lower die forming plane. The utility model provides the deformed pipe flanging die capable of positioning the pipe to be processed in the middle position of the forming plane of the lower die.

Description

Technical Field

[0001] The utility model relates to the field of metal tube extrusion processing, in particular to a deformable tube flanging die. Background Art

[0002] A deformed tube refers to a deformed tube with a non-circular cross-section that is extruded by an extrusion device. Sometimes the deformed tube is also required to have a certain flanging.

[0003] In the prior art, an upper die and a lower die are used to realize the extrusion processing of the deformed tube. When in use, the upper die is connected to the ram of the press, and the lower die is connected to the base of the press. The tube to be processed is placed on the upper side of the lower die. During operation, the ram carries the upper die downward to extrude the tube between the upper and lower dies. Usually, the upper die has a forming concave portion with a notch facing downward, and the lower die has a forming protrusion that cooperates with the forming concave portion. The top of the forming protrusion is a horizontal lower die forming plane. When the upper die moves into place, the deformed tube is extruded. The final cross-sectional shape of the deformed tube is a rectangle with the length extending in the left and right directions, and the bottoms of the left and right sides of the deformed tube have a flanging structure.

[0004] However, the problem with the existing technology is that the top of the forming protrusion is the lower mold forming plane. When the staff places the tube to be processed on the lower mold forming screen, it is impossible to accurately position the left and right positions of the tube on the lower mold forming plane. The staff must rely on experience to ensure that the tube is located in the middle position of the lower mold forming plane. This requires a high level of work proficiency of the staff and cannot guarantee the processing quality of the deformed tube. Once the tube deviates from the middle position of the lower mold forming screen, it will affect the final extrusion molding quality of the deformed tube. Utility Model Content

[0005] The utility model aims to provide a deformation tube flanging die which can position a tube to be processed at the middle position of a lower die forming plane.

[0006] In order to solve the above technical problems, the technical solution of a deformable tube flanging die in the present invention is as follows:

[0007] A modified tube flanging mold comprises an upper mold and a lower mold, the bottom of the upper mold has a molding concave portion with a notch facing downward, the top of the lower mold has a molding protrusion used in conjunction with the molding concave portion, the top of the molding protrusion is a horizontally arranged lower mold molding plane, and an assembly groove is provided on the lower mold molding plane, and a guide rod is assembled in the assembly groove in a floating manner along the up and down directions through a guide rod spring, the top of the guide rod is hinged with a left positioning plate and a right positioning plate, and a positioning plate return spring is respectively provided between the guide rod and the left positioning plate and the right positioning plate, a positioning concave portion with a notch facing upward is formed between the left positioning plate and the right positioning plate, and a support portion for supporting the corresponding positioning plate end portion is provided in the assembly groove, and when the ends of the left positioning plate and the right positioning plate are supported on the corresponding support portions, the upper plate surfaces of the left positioning plate and the right positioning plate are arranged flush with the lower mold molding plane.

[0008] Furthermore, the molding recess includes a molding recess top surface and molding recess side surfaces located on the left and right sides of the molding recess top surface, the spacing between the molding recess side surfaces gradually increases from top to bottom, and the molding recess also includes a molding recess vertical surface connected between the molding recess top surface and the corresponding molding recess side surfaces.

[0009] Furthermore, the forming protrusion includes forming protrusion side surfaces connected to the left and right sides of the lower mold forming plane, the spacing between the two forming protrusion side surfaces gradually increases from top to bottom, and the left and right width of the lower mold forming plane is greater than the left and right width of the top surface of the recess.

[0010] Furthermore, a guide hole is provided at the bottom of the assembly groove, and the guide rod is guided and moved in the up and down directions and assembled in the guide hole. The guide rod spring sleeve is connected to the outer periphery of the guide rod, and a spring seat is provided on the upper end of the guide rod on the lower side of the left positioning plate and the right positioning plate, and the upper end of the guide rod spring is connected to the lower end of the spring seat.

[0011] Furthermore, the lower end of the positioning plate return spring is connected to the upper end of the spring seat.

[0012] Furthermore, a support rod is provided at the bottom of the assembly groove on the periphery of the guide rod, and the support rod is used to cooperate with the bottom stop of the spring seat when the spring seat moves downward to limit the downward movement limit of the spring seat.

[0013] Furthermore, support platforms are provided at the left and right ends of the assembly groove, and the support portion is provided on the support platforms.

[0014] The beneficial effects of the present invention are as follows: when the present invention is in use, a positioning recess with an upward notch is formed between the left positioning support plate and the right positioning support plate. When the tube is extruded, the tube can be placed in the positioning recess first, and the left and right positions of the tube are positioned by the positioning recess, thereby ensuring that the tube is located in the middle position of the lower mold forming plane. As the lower mold descends, the guide rod moves downward, and as the tube deforms, the left end of the left positioning plate swings downward, and the right end of the right positioning plate swings downward. The left and right ends of the left positioning plate and the end of the right positioning plate are supported on the corresponding support parts, and the upper plate surfaces of the left positioning plate and the right positioning plate are flush with the lower mold forming plane. The left positioning plate, the right positioning plate and the lower mold forming plane together serve as a forming plane, which is convenient for forming the bottom shape of the tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0016] Figure 1 This is a structural schematic diagram of an embodiment of a deformable tube flanging die in the utility model;

[0017] Figure 2 yes Figure 1 A magnified view of point A in the figure;

[0018] Figure 3 yes Figure 1 Schematic diagram of the structure after the middle and upper mold moves downward;

[0019] Figure 4 yes Figure 3 Enlarged view of point B in FIG.

[0020] Explanation of the accompanying drawings: 1. Upper mold; 2. Lower mold; 3. Molding protrusion; 4. Molding recess; 5. Left positioning plate; 6. Right positioning plate; 7. Lower mold molding plane; 8. Molding protrusion side; 9. Tube; 10. Molding recess top surface; 11. Molding recess elevation; 12. Molding recess side; 13. Assembly groove; 14. Support platform; 15. Support part; 16. Guide rod; 17. Guide hole; 18. Guide rod spring; 19. Positioning plate return spring; 20. Spring seat; 21. Support rod. DETAILED DESCRIPTION

[0021] To facilitate understanding of the present invention, the present invention is described in more detail below with reference to the accompanying drawings and specific embodiments. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0022] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0023] The embodiment of a deformation tube flanging die in the utility model is as follows: Figures 1 to 4 As shown, the upper die 1 and the lower die 2 are fixed to the ram of a press during use, and the lower die 2 is fixed to the base of the press during use. The upper die has a downwardly facing forming recess 4 at the bottom, and the lower die has a forming protrusion 3 at the top for use with the forming recess. The top of the forming protrusion 3 is a horizontally arranged lower die forming plane 7. In this embodiment, the forming recess includes a forming recess top surface 10 and forming recess side surfaces 12 located on either side of the forming recess top surface 10. The spacing between the two forming recess side surfaces 12 gradually increases from top to bottom. The forming recess also includes a forming recess elevation 11 connecting the forming recess top surface to the corresponding forming recess side surface. The forming protrusion includes forming protrusion side surfaces 8 connecting the left and right sides of the lower die forming plane. The spacing between the two forming protrusion side surfaces 8 gradually increases from top to bottom. The left-right width of the lower die forming plane is greater than the left-right width of the recess top surface. The slope of the forming protrusion side surfaces is consistent with the slope of the corresponding forming recess side surfaces.

[0024] An assembly groove 13 is provided on the lower mold forming plane, and a guide rod 16 is floatingly assembled in the assembly groove 13 through a guide rod spring 18 in the up and down directions. Specifically, a guide hole 17 is provided at the bottom of the assembly groove, and the guide rod 16 is guided and moved in the up and down directions and assembled in the guide hole 17. The guide rod spring 18 is sleeved on the outer periphery of the guide rod 16, and a spring seat 20 is fixed to the upper end of the guide rod 16, and the upper end of the guide rod return spring presses on the bottom of the spring seat.

[0025] A left positioning plate 5 is hingedly connected to the top left end of the guide rod, and a right positioning plate 6 is hingedly connected to the top right end of the guide rod. The hinge axes of the left and right positioning plates extend in the front-to-back direction. Positioning plate return springs 19 are respectively provided between the upper end of the spring seat and the left positioning plate, and between the upper end of the spring seat and the right positioning plate. A positioning recess with an upward notch is formed between the left and right positioning plates. A support portion 15 is provided in the assembly groove for supporting the corresponding end of the positioning plate. Specifically, support platforms 14 are provided at the left and right ends of the assembly groove, and the support portion is provided on the support platforms.

[0026] A support rod 21 is provided at the bottom of the assembly groove on the periphery of the guide rod. The support rod 21 is used to cooperate with the bottom of the spring seat to limit the downward movement limit of the spring seat when the spring seat 20 moves downward.

[0027] When the ends of the left positioning plate and the right positioning plate are supported on the corresponding support parts, the upper plate surfaces of the left positioning plate and the right positioning plate are flush with the lower mold forming plane.

[0028] When using, first Figure 1 As shown, the tube to be extruded can be placed on the positioning recess formed by the left positioning plate and the right positioning plate. The positioning recess is a V-shaped structure, so the axis of the tube is automatically positioned by the positioning recess, thereby ensuring that the tube is in the middle position of the forming plane of the lower die. As the pressure head descends, the upper die applies pressure to the tube, and the guide rod floats downward until the spring seat is stopped by the support rod and cannot continue to move downward. As the upper die continues to descend, the tube is squeezed and deformed, and the left end of the left positioning plate is squeezed to swing downward, and the right end of the right positioning plate is swung downward until the left end of the left positioning plate is supported on the corresponding support part, and the right end of the right positioning plate is supported on the corresponding support part. At this time, Figure 3 As shown, the upper surfaces of the left and right positioning plates are flush with the lower die forming plane. At this time, the left and right positioning plates and the lower die forming plane together form a forming plane, which facilitates the bottom of the tube to be squeezed and deformed.

[0029] In the above description of this specification, unless otherwise expressly specified or limited, terms such as "fixed," "mounted," "connected," or "connected" should be understood broadly. For example, the term "connected" can refer to a fixed connection, a removable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal connection between two components or the interaction between two components. Therefore, unless otherwise expressly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0031] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinal numbers are used for descriptive purposes only and should not be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, "plurality" means at least two, such as two, three or more, etc., unless otherwise clearly specified.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A deformable tube flanging die, comprising an upper die and a lower die, wherein the upper die has a downwardly notched forming concave portion at the bottom, and the lower die has a forming protrusion at the top that cooperates with the forming concave portion, wherein the top of the forming protrusion is a horizontally arranged forming plane of the lower die, characterized in that: An assembly groove is provided on the lower mold forming plane, and a guide rod is assembled in the assembly groove in a floating manner along the up and down directions through a guide rod spring. The top of the guide rod is hinged with a left positioning plate and a right positioning plate. Positioning plate return springs are respectively provided between the guide rod and the left positioning plate and the right positioning plate. A positioning recess with an upward notch is formed between the left positioning plate and the right positioning plate. A supporting portion for supporting the corresponding end of the positioning plate is provided in the assembly groove. When the end portions of the left positioning plate and the right positioning plate are supported on the corresponding supporting portions, the upper plate surfaces of the left positioning plate and the right positioning plate are set flush with the lower mold forming plane.

2. The deformed tube flanging die according to claim 1, characterized in that: The molding concave portion includes a molding concave top surface and molding concave side surfaces located on the left and right sides of the molding concave top surface. The spacing between the molding concave side surfaces gradually increases from top to bottom. The molding concave portion also includes a molding concave vertical surface connected between the molding concave top surface and the corresponding molding concave side surfaces.

3. The deformed tube flanging die according to claim 2, characterized in that: The forming protrusion includes forming protrusion side surfaces connected to the left and right sides of the lower mold forming plane. The distance between the two forming protrusion side surfaces gradually increases from top to bottom. The left and right width of the lower mold forming plane is greater than the left and right width of the top surface of the recess.

4. The deformed tube flanging die according to any one of claims 1 to 3, characterized in that: A guide hole is provided at the bottom of the assembly groove, and the guide rod is guided and moved in the up and down directions and assembled in the guide hole. The guide rod spring is sleeved on the outer periphery of the guide rod, and a spring seat is provided on the upper end of the guide rod on the lower side of the left positioning plate and the right positioning plate, and the upper end of the guide rod spring is connected to the lower end of the spring seat.

5. The deformed tube flanging die according to claim 4, characterized in that: The lower end of the positioning plate return spring is connected to the upper end of the spring seat.

6. The deformed tube flanging die according to claim 4, characterized in that: A support rod is provided at the bottom of the assembly groove on the periphery of the guide rod. The support rod is used to cooperate with the bottom of the spring seat to limit the downward movement limit of the spring seat when the spring seat moves downward.

7. The deformed tube flanging die according to claim 6, characterized in that: Support platforms are provided at the left and right ends of the assembly groove, and the supporting part is provided on the support platforms.

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