Multifunctional mold base for high-precision seamless conical tube forming mold

Abstract

The invention discloses a multifunctional die frame of a high-precision seamless conical tube forming die, comprising a plurality of triangular prism-shaped inner cores (1) connected end to end, a through hole (6) matching the seamless conical tube to be produced is arranged on the center line of the inner core (1), three side surfaces of the inner core (1) are correspondingly provided with covers (2), a roller die body accommodating space (3) is formed inside the side surfaces of the inner core (1) and the corresponding covers (2), and a cylindrical outer shell (4) is covered on the outside of the matching body of the plurality of inner cores (1) and all the covers (2). The invention has the advantages of being able to be used for the centralized fixing of three forming roller dies arranged in a surrounding manner and being able to adjust the length according to the requirements of the processed products.

Description

Technical Field

[0001] The invention relates to the technical field of seamless cone tube forming, in particular to a multifunctional die frame of a high-precision seamless cone tube forming die. Background Art

[0002] Conical tubes are needed in the fields of petroleum, chemical industry, medical treatment, fire protection, electricity, mechanical equipment, logistics equipment, shipbuilding, construction, instrumentation, plumbing appliances, military and other fields. Since the main raw material of conical tubes is carbon steel, various materials such as stainless steel and alloy steel can also be used to obtain conical tubes with different properties. The traditional hot push forming method will cause irreversible changes in the internal molecular structure of the processed material, causing the processed conical tube to lose the performance of the material itself. Therefore, for some use environments with high requirements on materials, cold pressing has become the mainstream of conical tube processing.

[0003] For the cold forming of conical tubes, rolling processing has gradually replaced extrusion processing and become the mainstream of modern cold forming of conical tubes due to its advantages such as being able to process various sizes of tubes and having a low probability of tube bursting during processing. For rolling processing, the design of the mold is a major difficulty in processing. The current rolling forming molds are mainly in the form of a pair of molds. In the patent application CN 110303064 A applied for and published by our company, a roller mold for continuous cold forming of conical tubes has been disclosed. Two symmetrical molds are closely attached to form a rolling channel. For this type of mold, a conventional mold frame can be used to connect and position the two roller molds. However, the mold in the above patent is mainly used to process larger conical tubes. However, it involves more precise capillary flexible seamless conical tubes under specific requirements such as medical equipment, instruments and meters, and the outer diameter is generally 2.5-6.5mm. The mold in the above patent cannot process such millimeter-level conical tubes. For millimeter-level capillary flexible seamless conical tubes, three forming rollers are required to cooperate in processing them. The three forming rollers are arranged around to form a rolling channel, which can be used for processing smaller capillary flexible seamless conical tubes. Conventional mold frames cannot be used to fix three rollers due to their regular shapes. To position and fix three independent roller molds distributed in a ring, a separate mold frame needs to be designed to position and fix them to adapt to the arrangement of the roller molds. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional die frame for a high-precision seamless conical tube forming die, which has the advantages of being able to centrally fix three forming roller dies arranged in a surrounding manner and being able to adjust the length according to the requirements of the processed products.

[0005] The technical solution of the present invention is as follows: a multifunctional mold frame of a high-precision seamless conical tube forming mold comprises a plurality of triangular prism-shaped inner cores connected end to end, a through hole matching the seamless conical tube to be produced is arranged on the center line of the inner core, and covers are arranged correspondingly on the three side surfaces of the inner core, and a roller mold body accommodating space is formed inside the side surfaces of the inner core after being matched with the corresponding covers, and a cylindrical outer shell is covered on the outside of the matching body of the plurality of inner cores and all the covers.

[0006] In the multifunctional die frame of the aforementioned high-precision seamless conical tube forming die, each cover is formed with a through axial hole after being fitted to the side surface of the inner core.

[0007] In the aforementioned multifunctional die frame of the high-precision seamless conical tube forming die, the portion of the roller die body accommodating space on the inner core is a square groove perpendicular to the inner core side surface, and a semi-cylindrical groove perpendicular to the square groove is also provided on the side surface of the inner core.

[0008] In the aforementioned multifunctional die frame of the high-precision seamless conical tube forming die, the bottom of the square groove is tangent to the through hole.

[0009] In the aforementioned multifunctional die frame of the high-precision seamless conical tube forming die, limit blocks are provided at both ends of the cylindrical shell.

[0010] In the aforementioned multifunctional die frame of the high-precision seamless cone tube forming die, the plurality of triangular prism-shaped inner cores connected end to end are an integrated structure.

[0011] In the aforementioned multifunctional die frame of the high-precision seamless conical tube forming die, the plurality of triangular prism-shaped inner cores connected end to end are of a split structure, and two adjacent inner cores are connected by the tenons and grooves on the end faces.

[0012] Compared with the prior art, the present invention comprises a plurality of triangular prism-shaped inner cores connected end to end, a through hole matching the seamless conical tube to be produced is arranged on the center line of the inner core, and covers are arranged correspondingly on the three side surfaces of the inner core, and a detachable structure is formed between the side surfaces of the inner core and the corresponding covers, and a roller mold body accommodating space is formed inside the inner core after the side surfaces of the inner core cooperate with the corresponding covers, that is, the side surfaces of the inner core and the side surfaces of the covers are both provided with partially open roller mold body accommodating spaces, and the roller mold body can be placed on the inner core first and then covered with covers, which can be used for centralized fixation of three forming roller molds arranged in a surrounding manner, and the installation and disassembly of the roller mold body are relatively simple, and the outer surfaces of the matching bodies of the plurality of inner cores and all the covers of the present invention are covered with a cylindrical outer shell, which limits the matching bodies of the inner core and the covers in the radial direction, and limit blocks are also arranged at both ends of the cylindrical outer shell, which limit the matching bodies of the inner core and the covers in the axial direction, so that the present invention has stronger integrity.

[0013] Furthermore, after each cover is fitted with the side of the inner core, a through axial hole is formed for the embedding of the central axis of the roller mold body, so that the roller mold can rotate around the axis under the action of the processed product; the several triangular prism-shaped inner cores connected end to end of the present invention can be selected as an integrated structure or a split structure according to needs. The integrated structure is used when processing conical tubes of fixed length. It is more convenient to install and has good integrity. The split structure also allows the present invention to select the number of segments of the inner core according to the length of the conical tube to be processed, thereby adapting to the corresponding number of roller mold bodies to complete the processing of the conical tube of the target length.

[0014] In summary, the present invention has the advantages of being able to centrally fix three surroundingly arranged forming roller dies and being able to adjust the length according to the requirements of the processed products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the inner core;

[0017] Figure 3 is a schematic diagram of the structure of the cover;

[0018] Figure 4 It is a schematic diagram of the installation state of the roller mold body on the inner core;

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the cylindrical shell;

[0020] Figure 6 It is a schematic diagram of the cross-sectional structure of the cylindrical shell.

[0021] Figure numerals: 1-inner core, 2-cover, 3-roller mold body accommodating space, 4-cylindrical shell, 5-axial hole, 6-through hole, 7-limit block, 31-square groove, 32-semi-cylindrical groove. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0023] Embodiment: A multifunctional die frame for a high-precision seamless conical tube forming die, the structure of which is as follows: Figures 1 to 6As shown, it comprises a plurality of triangular prism-shaped inner cores 1 connected end to end, a through hole 6 matching the produced seamless conical tube is arranged on the center line of the inner core 1, and covers 2 are arranged correspondingly on the three side surfaces of the inner core 1, and a detachable structure is formed between the side surfaces of the inner core 1 and the corresponding covers 2, and a roller mold body accommodating space 3 is formed inside, that is, the side surfaces of the inner core 1 and the side surfaces of the covers 2 are both provided with partially open roller mold body accommodating spaces 3, and the roller mold body can be placed on the inner core 1 first and then covered with the covers 2, which can be used for centralized fixation of three forming roller molds arranged in a surrounding manner, and the installation and disassembly of the roller mold body are relatively simple, and a cylindrical outer shell 4 is sheathed on the outside of the matching bodies of the plurality of inner cores 1 and all the covers 2, and the cylindrical outer shell 4 limits the matching bodies of the inner core 1 and the covers 2 in the radial direction, and limit blocks 7 are also arranged at both ends of the cylindrical outer shell 4, which limit the matching bodies of the inner core 1 and the covers 2 in the axial direction, so that the present invention has stronger integrity.

[0024] The present invention mainly serves three roller mold bodies arranged in a surrounding manner. The main body of the roller mold body is cylindrical, and roller shafts arranged along the axis are provided on the two end faces of the cylindrical shape. The schematic diagram of the installation state of the roller mold body on the inner core 1 is shown in FIG. Figure 4 As shown, combined Figure 1 From the perspective of the present invention, each cover 2 is formed with a through axial hole 5 after being fitted with the side of the inner core 1, for the embedding of the central axis of the roller mold body; the portion of the roller mold body accommodating space 3 on the inner core 1 is a square groove 31 perpendicular to the side of the inner core 1, and a semi-cylindrical groove 32 perpendicular to the square groove 31 is also provided on the side of the inner core 1; the bottom of the square groove 31 is tangent to the through hole 6, so that the present invention can meet the processing requirements of the tapered tube after the roller mold body is installed.

[0025] The triangular prism-shaped inner cores 1 connected end to end in the present invention can be selected as an integrated structure or a split structure according to needs. The integrated structure is used when processing a cone tube of a fixed length. It is more convenient to install and has good integrity. The split structure also allows the present invention to select the number of segments of the inner core 1 according to the length of the cone tube to be processed, thereby adapting the corresponding number of roller mold bodies to complete the processing of the cone tube of the target length.

[0026] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation on the present invention.

Claims

1. A multifunctional die frame for a high-precision seamless conical tube forming die, characterized in that: It comprises a plurality of triangular prism-shaped inner cores (1) connected end to end, a through hole (6) matching the seamless conical tube to be produced is provided on the center line of the inner core (1), three side surfaces of the inner core (1) are provided with corresponding covers (2), and a roller mold body accommodating space (3) is formed inside the side surfaces of the inner core (1) when matched with the corresponding covers (2), and a cylindrical outer shell (4) is provided outside the matching body of the plurality of inner cores (1) and all the covers (2); After each cover (2) is attached to the side surface of the inner core (1), a through-going shaft hole (5) is formed; The portion of the roller mold body accommodating space (3) on the inner core (1) is a square groove (31) perpendicular to the side of the inner core (1), and a semi-cylindrical groove (32) perpendicular to the square groove (31) is also provided on the side of the inner core (1); the bottom of the square groove (31) is tangent to the through hole (6); Position limiting blocks (7) are provided at both ends of the cylindrical housing (4).

2. The multifunctional die frame of the high-precision seamless conical tube forming die according to claim 1 is characterized in that: The plurality of triangular prism-shaped inner cores (1) connected end to end are an integrated structure.

3. The multifunctional die frame of the high-precision seamless conical tube forming die according to claim 1 is characterized in that: The plurality of triangular prism-shaped inner cores (1) connected end to end are of a split structure, and two adjacent inner cores (1) are connected by means of a tenon and a groove on the end surface.

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