Cylindrical forge piece drawing-out core rod

By designing a long-distance mandrel forgings including the main body of the mandrel, stop and connector, the mandrel and blanks are separated by rotary connection and extrusion, the problem of adhesion between the blanks and the mandrel during the extraction process is solved, and the problem of adhesion between the blanks and the mandrels is improved. Demolding efficiency.

CN222288665UActive Publication Date: 2025-01-03TONGYU HEAVY IND
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Patent Information

Application Number
CN202421034605.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-13
Publication Date
2025-01-03
Estimated Expiration
2034-05-13

AI Technical Summary

Technical Problem

During the extraction process of cylinder forgings, due to metal flow, temperature changes and pressure, the blank is prone to stick to the mandrel, resulting in difficulty in demolding.

Method used

A barrel-type forging long mandrel rod including a mandrel body, a first stop, a second stop, a first connector and a second connector are designed. The core is realized by rotating connection and extrusion of these components. Separation of the rod body from the blank to avoid adhesion.

Benefits of technology

It effectively solves the problem of difficult demolding of blanks and mandrels, and improves the elimination efficiency and success rate of forgings.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a drawing-out core rod for cylindrical forgings, and particularly relates to the field of forging. The cylinder type forge piece drawing-out core rod comprises a core rod body, a first check block, a second check block, a first connecting piece and a second connecting piece. A flange is arranged at one end of the core rod main body; the first stop block is arranged on the side, facing the blank, of the flange. The second stop block is arranged on the side, facing the flange, of the blank. One end of the first connecting piece is rotationally connected with the first stop block; one end of the second connecting piece is rotationally connected with the second stop block, and the other end is rotationally connected with the other end of the first connecting piece. The end, away from the flange, of the core rod body sequentially penetrates through the first check block, the second check block and the blank. When the core rod body is separated from the blank, the first connecting piece and the second connecting piece are extruded in the radial direction of the core rod body, the core rod body and the blank move oppositely under pushing of the first connecting piece and the second connecting piece, and therefore separation of the core rod body and the blank is achieved.
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Description

Technical Field

[0001] The utility model relates to the field of forging, in particular to a drawing mandrel for a tube-type forging. Background Art

[0002] Tubular forgings are an important product in the forging industry, usually referring to forgings of cylindrical or tubular containers with hollow cross-sections. The common forming method of tubular forgings is to upset and punch the blank, expand the hole, and then extend the mandrel in the hole for drawing. During the drawing process, the upper flat anvil and the lower V-shaped anvil are generally used to subject the blank to three-dimensional compressive stress, while preventing the blank from flowing in the diameter direction, thereby improving the drawing efficiency of the forging. However, due to the metal flow, temperature changes and pressure effects, the blank is prone to adhere to the mandrel in the above-mentioned drawing process, resulting in difficulty in demolding. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the utility model provides a drawing mandrel for a cylindrical forging to improve the problem of difficulty in demoulding the blank and the mandrel.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a mandrel for drawing cylindrical forgings. The mandrel for drawing cylindrical forgings comprises a mandrel body, a first stopper, a second stopper, a first connecting piece and a second connecting piece. A flange is provided at one end of the mandrel body; the first stopper is provided on the side of the flange facing the blank; the second stopper is provided on the side of the blank facing the flange; one end of the first connecting piece is rotatably connected to the first stopper; one end of the second connecting piece is rotatably connected to the second stopper, and the other end of the second connecting piece is rotatably connected to the other end of the first connecting piece; wherein the end of the mandrel body facing away from the flange passes through the first stopper, the second stopper and the blank in sequence.

[0005] In an example of the present invention, the outer edge of the first stopper is a quadrilateral, and a circular through hole is provided in the center of the first stopper.

[0006] In an example of the present invention, the outer edge of the second stopper is a quadrilateral, and a circular through hole is provided in the center of the second stopper.

[0007] In an example of the present invention, the outer edge perimeter of the first stopper is longer than the diameter of the flange.

[0008] In an example of the present invention, the first connecting member and the second connecting member are both in a strip shape.

[0009] In an example of the utility model, a first through hole is provided at one end of the first connecting member connected to the first stopper, a first threaded hole is provided at a corresponding position of the first stopper, and a bolt passes through the first through hole and is fixedly connected to the first threaded hole.

[0010] In an example of the present invention, a second through hole is provided at one end of the second connecting member connected to the second stopper, a second threaded hole is provided at a corresponding position of the second stopper, and a bolt passes through the second through hole and is fixedly connected to the second threaded hole.

[0011] In an example of the utility model, a third through hole is provided at one end of the first connecting member away from the first stopper, a fourth through hole is provided at one end of the second connecting member away from the second stopper, and a pin passes through the third through hole and the fourth through hole.

[0012] In an example of the present invention, the flange and the core rod body are integrally formed.

[0013] In an example of the present invention, the flange is a cylindrical structure.

[0014] The utility model relates to a mandrel for drawing a cylindrical forging, wherein a flange is arranged on the mandrel body, a first stopper is arranged on the side of the flange facing the blank, a second stopper is arranged on the side of the blank facing the flange, a first connecting member and a second connecting member are arranged between the first stopper and the second stopper, the first connecting member is rotatably connected to the first stopper, the second connecting member is rotatably connected to the second stopper, the first connecting member and the second connecting member are rotatably connected, and the end of the mandrel body away from the flange passes through the first stopper, the second stopper and the blank in sequence. When the mandrel body is separated from the blank, the first connecting member and the second connecting member are extruded along the radial direction of the mandrel body, the first connecting member extrudes the flange through the first stopper to push the mandrel body, the second connecting member extrudes the second stopper to push the blank, the mandrel body and the blank move away from each other, thereby realizing the separation of the mandrel body and the blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the cooperation structure of the cylindrical forging drawing mandrel and the blank in one embodiment of the utility model;

[0017] Figure 2 It is a schematic diagram of a mandrel body of a cylindrical forging drawing mandrel in one embodiment of the utility model;

[0018] Figure 3 It is a front view of a first stopper of a cylindrical forging drawing mandrel in one embodiment of the utility model;

[0019] Figure 4 It is a side view of a first stopper of a cylindrical forging drawing mandrel in one embodiment of the utility model;

[0020] Figure 5 It is a front view of a first connecting member of a cylindrical forging drawing mandrel in one embodiment of the utility model;

[0021] Figure 6 It is a side view of a first connecting piece of a cylindrical forging drawing mandrel in one embodiment of the utility model;

[0022] Figure 7 It is a schematic diagram of the cooperation between the stopper and the connecting piece of the cylindrical forging drawing mandrel in one embodiment of the utility model;

[0023] Figure 8 The utility model is a side view of the cooperation between the stopper and the connecting piece of the cylindrical forging drawing mandrel in one embodiment.

[0024] Component number description

[0025] 100, mandrel body; 110, flange; 200, first stopper; 300, second stopper; 400, first connecting piece; 500, second connecting piece; 600, blank. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0027] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0028] See also Figures 1 to 8The utility model provides a mandrel for drawing a cylindrical forging, which comprises a mandrel body 100, a first stopper 200, a second stopper 300, a first connecting piece 400 and a second connecting piece 500. The mandrel body 100 passes through the first stopper 200, the second stopper 300 and the blank 600 in sequence, and the first connecting piece 400 and the second connecting piece 500 are pressed along the radial direction of the mandrel body 100. The first connecting piece 400 drives the first stopper 200 to push the mandrel body 100, and the second connecting piece 500 drives the second stopper 300 to push the blank 600. The mandrel body 100 and the blank 600 move in opposite directions, thereby realizing the separation of the mandrel body 100 and the blank 600.

[0029] See also Figure 1 and Figure 2 In one embodiment, the mandrel body 100 is a conical structure, and a flange 110 is provided at the end of the mandrel body 100 with a larger diameter, which is used to resist the first stopper 200. The structure of the flange 110 is not limited here, for example, the flange 110 can be a cuboid, a cube or a cylinder. Exemplarily, the flange 110 is a cylinder, and the size of the flange 110 is adjusted according to actual needs. The flange 110 can be fixedly connected to the mandrel body 100 by any fixing method, including but not limited to welding or integral molding. In one embodiment, the flange 110 is integrally molded with the mandrel body 100. In the present application, the shape and size of the mandrel body 100 are not limited, and are adjusted according to the shape and size of the prepared forging, and the flange 110 is arranged at the end of the mandrel body 100 away from the blank 600.

[0030] See also Figure 1 , Figure 3 and Figure 4, the first stopper 200 is arranged on the side of the flange 110 facing the blank 600, the second stopper 300 is arranged on the side of the blank 600 facing the flange 110, one end of the first connecting member 400 is rotatably connected to the first stopper 200, one end of the second connecting member 500 is rotatably connected to the second stopper 300, and the other end of the second connecting member 500 is rotatably connected to the other end of the first connecting member 400. In one embodiment, the outer circumference of the first stopper 200 and the outer circumference of the second stopper 300 are both quadrilaterals, which is convenient for installing the first connecting member 400 and the second connecting member 500. Further, the outer circumference of the first stopper 200 is longer than the diameter of the flange 110 to increase the contact area between the first stopper 200 and the flange 110. The center of the first stopper 200 and the center of the second stopper 300 are both provided with a circular through hole for the mandrel body 100 to pass through. The diameter of the circular through hole is larger than the diameter of the mandrel body 100, and the first stopper 200 and the second stopper 300 are both loosely matched with the mandrel body 100. In other embodiments, the through holes on the first stopper 200 and the second stopper 300 may also be in other shapes, such as a rectangle or a square, as long as the size of the through hole is larger than the diameter of the mandrel body 100, and the first stopper 200 and the second stopper 300 can move along the axial direction of the mandrel body 100. The sizes of the first stopper 200 and the second stopper 300 may be equal or unequal. In this embodiment, the sizes of the first stopper 200 and the second stopper 300 are equal.

[0031] See also Figures 5 to 8 In one embodiment, the first connector 400 and the second connector 500 are both strip-shaped. The length L and thickness H of the first connector 400 are not limited here, and they can be adjusted according to actual needs. The size of the second connector 500 is consistent with the size of the first connector 400. In this application, there is no limitation on the number of the first connector 400 and the second connector 500, as long as the number of the first connector 400 and the second connector 500 is consistent. For example, the number of the first connector 400 and the second connector 500 can be one, two or more. Further, in order to make the first connector 400 and the second connector 500 more uniformly stressed and the core rod body 100 and the blank 600 easier to separate, the number of the first connector 400 and the second connector 500 is four. Among them, two first connectors 400 and two second connectors 500 are arranged on the same side of the first stopper 200 and the second stopper 300, and the other two first connectors 400 and two second connectors 500 are arranged on the other opposite side.

[0032] See also Figure 7 and Figure 8In one embodiment, a first through hole is provided at one end of the first connecting member 400 connected to the first stopper 200, a first threaded hole is provided at a corresponding position of the first stopper 200, a bolt passes through the first through hole and is fixedly connected to the first threaded hole, and the first connecting member 400 can rotate around the bolt on the first stopper 200. A second through hole is provided at one end of the second connecting member 500 connected to the second stopper 300, a second threaded hole is provided at a corresponding position of the second stopper 300, a bolt passes through the second through hole and is fixedly connected to the second threaded hole, and the second connecting member 500 rotates around the bolt on the second stopper 300. A third through hole is provided at one end of the first connecting member 400 away from the first stopper 200, and a fourth through hole is provided at one end of the second connecting member 500 away from the second stopper 300, a pin passes through the third through hole and the fourth through hole, so as to realize the rotation connection between the first connecting member 400 and the second connecting member 500.

[0033] See also Figure 1 The method for using the drawing mandrel for the cylindrical forging in the present application is as follows: the end of the mandrel body 100 away from the flange 110 passes through the first stopper 200, the second stopper 300 and the blank 600 in sequence, and the flange 110, the first stopper 200 and the second stopper 300 are fitted in sequence to avoid affecting the use of the mandrel body 100. When the mandrel body 100 is pulled out after the blank 600 is drawn out, the first connecting member 400 and the second connecting member 500 are squeezed along the radial direction of the mandrel body 100, and the pressure of the first connecting member 400 and the second connecting member 500 along the axial direction of the mandrel body 100 is applied to the first stopper 200 and the second stopper 300 respectively, and the flange 110 is pushed by the first stopper 200, and the blank 600 is pushed by the second stopper 300, so that the mandrel body 100 and the blank 600 move in opposite directions, so as to achieve the purpose of separating the mandrel body 100 from the blank 600.

[0034] The utility model is a tube-type forging elongated mandrel, wherein a flange is arranged on the mandrel body, a first stopper is arranged on the side of the flange facing the blank, a second stopper is arranged on the side of the blank facing the flange, a first connecting member and a second connecting member are arranged between the first stopper and the second stopper, the first connecting member is rotatably connected to the first stopper, the second connecting member is rotatably connected to the second stopper, the first connecting member is rotatably connected to the second stopper, and the end of the mandrel body away from the flange passes through the first stopper, the second stopper and the blank in sequence. When the mandrel body is separated from the blank, the first connecting member and the second connecting member are extruded along the radial direction of the mandrel body, the first connecting member extrudes the flange through the first stopper to push the mandrel body, the second connecting member extrudes the second stopper to push the blank, the mandrel body and the blank move in opposite directions, thereby realizing the separation of the mandrel body and the blank. Therefore, the utility model effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A mandrel for drawing a cylindrical forging, characterized in that: include: A mandrel body, one end of which is provided with a flange; A first stopper is arranged on a side of the flange facing the blank; A second stopper is arranged on a side of the blank facing the flange; A first connecting member, one end of which is rotatably connected to the first stopper; A second connecting member, one end of which is rotatably connected to the second stopper, and the other end of which is rotatably connected to the other end of the first connecting member; Wherein, one end of the core rod body facing away from the flange passes through the first stopper, the second stopper and the blank in sequence.

2. The drawing mandrel for cylindrical forgings according to claim 1, characterized in that: The outer edge of the first stopper is a quadrilateral, and a circular through hole is provided at the center of the first stopper.

3. The drawing mandrel for cylindrical forgings according to claim 2, characterized in that: The outer edge of the second stopper is a quadrilateral, and a circular through hole is provided at the center of the second stopper.

4. The drawing mandrel for cylindrical forgings according to claim 2, characterized in that: The outer perimeter of the first stopper is longer than the diameter of the flange.

5. The drawing mandrel for cylindrical forgings according to claim 1, characterized in that: The first connecting member and the second connecting member are both in strip shape.

6. The drawing mandrel for cylindrical forgings according to claim 1, characterized in that: A first through hole is provided at one end of the first connecting member connected to the first stopper, a first threaded hole is provided at a corresponding position of the first stopper, and a bolt passes through the first through hole and is fixedly connected to the first threaded hole.

7. The drawing mandrel for cylindrical forgings according to claim 1, characterized in that: A second through hole is provided at one end of the second connecting member connected to the second stopper, a second threaded hole is provided at a corresponding position of the second stopper, and a bolt passes through the second through hole and is fixedly connected to the second threaded hole.

8. The drawing mandrel for cylindrical forgings according to claim 1, characterized in that: A third through hole is provided at one end of the first connecting member away from the first stopper, a fourth through hole is provided at one end of the second connecting member away from the second stopper, and a pin passes through the third through hole and the fourth through hole.

9. The drawing mandrel for cylindrical forgings according to claim 1, characterized in that: The flange and the core rod body are integrally formed.

10. The drawing mandrel for cylindrical forgings according to claim 1, characterized in that: The flange is a cylindrical structure.