Lower demolding structure for long-stroke seamless tube

Abstract

The utility model discloses a long-stroke seamless pipe lower demolding structure which comprises a lower mold base, an upper mold base, a lower mold cavity and an upper mold column, the lower mold cavity and the lower mold base are arranged in a split mode, a displacement device is arranged between the lower mold cavity and the lower mold base, and the displacement device can move the lower mold cavity away from the lower portion of the lower mold column. The displacement device resets the lower die cavity to the position below the lower die column, and after the lower die cavity is moved away, blocking of the lower die cavity is reduced, the seamless pipe can be taken out from the neutral position between the upper die column and the lower die base, and the demolding distance of the seamless pipe is increased; the distance H between the bottom of the upper die column and the top of the lower die cavity and the height S of the lower die cavity can be about the machinable length L of the seamless pipe, namely the machinable length L of the seamless pipe can be increased to about H + S, and therefore the machining length of the seamless pipe is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to a seamless tube processing technical field especially relates to a long stroke seamless tube lower demoulding structure. BACKGROUND

[0002] Seamless tube is a kind of long strip pipe material with hollow section, and the periphery has no joint, and its material can be aluminum alloy, carbon steel, alloy steel or stainless steel etc. Unlike welded pipe, seamless tube does not need welding in the production process, so there is no welding seam. From the appearance, seamless tube is smoother than welded pipe, and there is no obvious welding mark.

[0003] The production process of seamless tube mainly has rolling method, extrusion method, drawing method, forging method etc.

[0004] 1, rolling method: rolling method is the most common method for producing seamless tube. This method is to heat the blank to a certain temperature and then roll, then shape by shaping machine, and finally cool. The wall thickness of the seamless tube produced by rolling method is uniform, but the production efficiency is low.

[0005] 2, extrusion method: extrusion method is to produce seamless tube by pressing the heated blank into tubular shape. Extrusion method can produce large-diameter seamless tube, but there are problems such as pipe deformation and uneven pipe wall thickness in the production process.

[0006] 3, drawing method: drawing method is a process of stretching the heated blank into tubular shape. The wall thickness of the seamless tube produced by this method is uniform, and the surface is smooth, but the production cost is high, and the production efficiency is low. The seamless tube produced by drawing method is mainly used for high-precision mechanical parts.

[0007] 4, forging method: forging method is to produce seamless tube by forging the heated blank. The wall thickness of the seamless tube produced by forging method is uniform, and the surface is smooth, free of pores and impurities, with high toughness and high strength. But the production cost of forging method is relatively high, only suitable for small-scale production of seamless tube.

[0008] In the related forging method for making large-diameter aluminum alloy seamless tube, the seamless tube forging machine includes an upper die seat and a lower die seat, an upper die column and a lower die cavity are arranged between the upper die seat and the lower die seat, a pipe blank for forging seamless tube is placed in the lower die cavity, and the upper die column repeatedly stamps the pipe blank in the lower die cavity under the action of pressure, so that the corresponding specification of seamless tube can be made.

[0009] For example, Figure 1As shown, after the seamless tube is completed by stamping, the seamless tube follows the upper die post to move upward, when the upper die post rises to the top end, the distance H between the bottom of the upper die post and the top of the lower die cavity needs to be greater than the length L of the seamless tube, so that the seamless tube can be downward demolded and taken out between the bottom of the upper die post and the top of the lower die cavity, therefore, the processing length L of the seamless tube is limited by the distance H between the bottom of the upper die post and the top of the lower die cavity.

[0010] If the block of the lower die cavity height S can be eliminated, the distance H between the bottom of the upper die post and the top of the lower die cavity plus the lower die cavity height S can be the processing length L of the seamless tube when the upper die post rises to the top end, at this time, the processing length of the seamless tube can be increased.

[0011] Therefore, the application provides a long-stroke seamless tube downward demolding structure, which can move the lower die cavity away, so that the lower die cavity height S disappears, the demolding distance of the seamless tube is increased, and the processing length of the seamless tube can be increased. Content of the utility model

[0012] In view of the problems in the related art, the application discloses a long-stroke seamless tube downward demolding structure, and solves the problem of short processing length of the seamless tube in the related art.

[0013] To achieve the above object, the application provides the following technical scheme.

[0014] A long-stroke seamless tube downward demolding structure, comprising a lower die seat and an upper die seat, wherein the upper part of the lower die seat is provided with a lower die cavity, the lower die cavity is a U-shaped cavity structure, the lower part of the upper die seat is provided with an upper die post connected with a power mechanism, the upper die post can repeatedly stamp downward under the action of the power mechanism, the lower die cavity and the lower die seat are separately arranged, a displacement device is arranged between the lower die cavity and the lower die seat, the displacement device can move the lower die cavity away from below the lower die post, and the displacement device resets the lower die cavity below the lower die post after the seamless tube is demolded.

[0015] As a further scheme of the application, the displacement device comprises a power device, the fixed end of the power device is fixedly connected with the lower die seat, the moving end of the power device is fixedly connected with the lower die cavity, and the moving end of the power device drives the lower die cavity to move under the action of power.

[0016] As a further scheme of the application, the power device comprises a hydraulic cylinder, the main body of the hydraulic cylinder is fixedly connected with the lower die seat, the hydraulic cylinder comprises a telescopic rod, the telescopic end of the telescopic rod is fixedly connected with the lower die cavity, and the telescopic rod drives the lower die cavity to move in the telescopic process.

[0017] As a further scheme of the application, a track device is arranged between the upper part of the lower die seat and the lower part of the lower die cavity, and the track device provides a moving track for the lower die cavity.

[0018] As a further scheme of the present application: the track device comprises a track slot and a track protrusion, and the track slot and the track protrusion are arranged in cooperation.

[0019] As a further scheme of the present application: the track slot is arranged on the upper portion of the lower die seat, and the track protrusion is arranged on the lower portion of the lower die cavity.

[0020] As a further scheme of the present application: the width of the track protrusion is greater than the width of the lower die cavity.

[0021] As a further scheme of the present application: the height of the track protrusion is equal to the depth of the track slot.

[0022] In summary, the beneficial effects of the present application are:

[0023] 1. A long-stroke seamless pipe demolding structure, comprising a lower die seat, an upper die seat, a lower die cavity and an upper die column, the lower die cavity and the lower die seat are arranged separately, a displacement device is arranged between the lower die cavity and the lower die seat, the displacement device can move the lower die cavity away from below the lower die column, after the seamless pipe is demolded, the displacement device resets the lower die cavity to below the lower die column, after the lower die cavity is moved away, the lower die cavity is blocked, the seamless pipe can be taken out from the gap between the upper die column and the lower die seat, the demolding distance of the seamless pipe is increased, when the upper die column rises to the top end, the distance H from the bottom of the upper die column to the top of the lower die cavity + the height S of the lower die cavity can be about the processable length L of the seamless pipe, that is, the processable length L of the seamless pipe can be increased to about H + S, thereby improving the processable length of the seamless pipe.

[0024] 2. The displacement device comprises a power device, the power device is preferably a hydraulic cylinder, the main body of the hydraulic cylinder is fixedly connected with the lower die seat, the hydraulic cylinder comprises a telescopic rod, the telescopic end of the telescopic rod is fixedly connected with the lower die cavity, the telescopic rod drives the lower die cavity to move in the telescopic process, the hydraulic cylinder has simple structure, stable operation and good economy.

[0025] 3. The track device comprises a track slot and a track protrusion, the track slot and the track protrusion are arranged in cooperation, the track protrusion is limited in the track slot, the track device has simple structure, stable cooperation and efficient movement.

[0026] 4. The track slot is arranged as a single slot, the track protrusion is limited in the track slot, the width of the track protrusion is greater than the width of the lower die cavity, the track protrusion can bear a larger impact force of the upper die column, and the movement of the lower die cavity has higher stability.

[0027] 5. The height of the track protrusion is equal to the depth of the track slot, the track protrusion is flush with the surface of the lower die seat after being limited in the track slot, thereby improving the safety and aesthetics of the equipment operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and are used to explain the present application and are not intended to limit the present application.

[0029] In the drawings:

[0030] Figure 1 It is a structural schematic diagram of a conventional seamless pipe forging machine.

[0031] Figure 2 It is a structural schematic diagram of a long-stroke seamless pipe lower demolding structure of the present application.

[0032] Figure 3 It is a top view structural schematic diagram of a lower die base and a lower die cavity of the long-stroke seamless pipe lower demolding structure of the present application.

[0033] Reference signs annotation:

[0034] 1, lower die base; 2, upper die base; 3, lower die cavity; 4, upper die column; 5, hydraulic cylinder; 6, telescopic rod; 7, track groove; 8, track protrusion; DETAILED DESCRIPTION

[0035] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, unless otherwise indicated, like numbers in the attached drawings refer to the same or similar elements. The following detailed description includes specific details for the purpose of providing a thorough understanding of the exemplary embodiments. However, it will be apparent to those skilled in the art that the exemplary embodiments can be practiced without these specific details. In some instances, well-known structures and functions have not been described in detail in order to avoid obscuring the understanding of the exemplary embodiments.

[0036] It should be noted that all directional references (e.g., upper, lower, left, right, front, rear, etc.) contained in the embodiments described herein are in connection with the exemplary embodiments only and do not denote or imply actual orientation or position, even if referred to using directional terms.

[0037] In addition, the terms "first", "second", and the like, as used in the description of embodiments herein, do not necessarily have an ordinal or chronological significance, unless otherwise indicated. Rather, these terms are used to distinguish between different components or operations of the present application. Thus, the features identified as "first" and "second" can include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of a person skilled in the art. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0038] In order to further understand the content, features and effects of the present application, the following examples are given, and are described in detail as follows with reference to the accompanying drawings:

[0039] As shown in Figures 2-3 :

[0040] The long-stroke seamless pipe demolding structure comprises a lower die seat 1 and an upper die seat 2. The upper part of the lower die seat 1 is provided with a lower die cavity 3, which is a U-shaped cavity structure. The lower part of the upper die seat 2 is provided with an upper die column 4 connected with a power mechanism. The upper die column 4 can be repeatedly stamped downward under the action of the power mechanism.

[0041] The lower die cavity 3 is arranged separately from the lower die seat 1. A displacement device is arranged between the lower die cavity 3 and the lower die seat 1. The displacement device can move the lower die cavity 3 away from below the lower die column. After the seamless pipe is demolded, the displacement device resets the lower die cavity 3 to below the lower die column.

[0042] The lower die cavity 3 and the lower die seat 1 can be in plane contact. The displacement device can drive the lower die cavity 3 to move in a straight line, an arc line or a curve.

[0043] Preferably, the displacement device comprises a power device. The fixed end of the power device is fixedly connected with the lower die seat 1. The moving end of the power device is fixedly connected with the lower die cavity 3. The moving end of the power device drives the lower die cavity 3 to move under the action of the power.

[0044] In actual application, the power device is preferably a hydraulic cylinder 5. The main body of the hydraulic cylinder 5 is fixedly connected with the lower die seat 1. The hydraulic cylinder 5 comprises a telescopic rod 6. The telescopic end of the telescopic rod 6 is fixedly connected with the lower die cavity 3. The telescopic rod 6 drives the lower die cavity 3 to move in a straight line in a reciprocating manner in the telescopic process.

[0045] In addition, a track device is arranged between the upper part of the lower die seat 1 and the lower part of the lower die cavity 3. The track device provides a fixed moving track for the lower die cavity 3.

[0046] Preferably, the track device comprises a track groove 7 and a track protrusion 8. The track groove 7 and the track protrusion 8 are arranged in cooperation.

[0047] The track groove 7 is arranged on the upper part of the lower die seat 1. The track protrusion 8 is arranged on the lower part of the lower die cavity 3. The track groove 7 is arranged in a single groove. The track protrusion 8 is limited in the track groove 7. The width of the track protrusion 8 is greater than the width of the lower die cavity 3. The height of the track protrusion 8 is equal to the depth of the track groove 7.

[0048] In actual application,

[0049] The long-stroke seamless pipe bottom demoulding structure comprises a lower die base 1, an upper die base 2, a lower die cavity 3 and an upper die column 4, the lower die cavity 3 is arranged separately from the lower die base 1, a displacement device is arranged between the lower die cavity 3 and the lower die base 1, the displacement device can move the lower die cavity 3 away from below the lower die column, after the seamless pipe is demoulded, the displacement device resets the lower die cavity 3 to below the lower die column, after the lower die cavity 3 is moved away, the lower die cavity 3 is blocked, the seamless pipe can be taken out from the gap between the upper die column 4 and the lower die base 1, the demoulding distance of the seamless pipe is increased, when the upper die column 4 rises to the top end, the distance H from the bottom of the upper die column 4 to the top of the lower die cavity 3 plus the height S of the lower die cavity 3 can be about the processable length L of the seamless pipe, that is, the processable length L of the seamless pipe can be increased to about H+S, thereby the processable length of the seamless pipe is improved.

[0050] The power device is preferably a hydraulic cylinder 5, the main body of the hydraulic cylinder 5 is fixedly connected with the lower die base 1, the hydraulic cylinder 5 comprises a telescopic rod 6, the telescopic end of the telescopic rod 6 is fixedly connected with the lower die cavity 3, the telescopic rod 6 drives the lower die cavity 3 to move in the telescopic process, the hydraulic cylinder 5 has simple structure, stable operation and good economy.

[0051] The track device comprises a track groove 7 and a track protrusion 8, the track groove 7 and the track protrusion 8 are arranged in cooperation, the track protrusion 8 is limited in the track groove 7, the track device has simple structure, stable cooperation and efficient movement.

[0052] The track groove 7 is arranged as a single groove, the track protrusion 8 is limited in the track groove 7, the width of the track protrusion 8 is greater than the width of the lower die cavity 3, the track protrusion 8 can bear greater impact force of the upper die column 4, and meanwhile the movement of the lower die cavity 3 has higher stability.

[0053] The height of the track protrusion 8 is equal to the depth of the track groove 7, after the track protrusion 8 is limited in the track groove 7, the track protrusion 8 is flush with the surface of the lower die base 1, thereby the operation safety and the aesthetic property of the equipment are improved.

[0054] Finally, it should be noted that the above disclosure is only the preferred embodiment of the present application and is not used to limit the present application, although the present application is described in detail with reference to the foregoing embodiments, the skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. The scope of the present application is only limited by the appended claims.

Claims

1. A long-stroke seamless tube lower demolding structure, comprising a lower mold base (1) and an upper mold base (2), wherein the lower mold base (1) is provided with a lower mold cavity (3) at its upper part, the lower mold cavity (3) being a U-shaped cavity structure, and the upper mold base (2) is provided with an upper mold column (4) connected to a power mechanism at its lower part, the upper mold column (4) being able to repeatedly press downwards under the action of the power mechanism, characterized in that: The lower mold cavity (3) and the lower mold base (1) are separately arranged. A displacement device is provided between the lower mold cavity (3) and the lower mold base (1). The displacement device can move the lower mold cavity (3) away from the lower mold column. After the seamless tube is demolded, the displacement device will reset the lower mold cavity (3) to the lower mold column.

2. The long-stroke seamless tube demolding structure according to claim 1, characterized in that: The displacement device includes a power device. The fixed end of the power device is fixedly connected to the lower mold base (1), and the moving end of the power device is fixedly connected to the lower mold cavity (3). The moving end of the power device drives the lower mold cavity (3) to move under the action of power.

3. The long-stroke seamless tube demolding structure according to claim 2, characterized in that: The power unit includes a hydraulic cylinder (5), the main body of which is fixedly connected to the lower mold base (1). The hydraulic cylinder (5) includes a telescopic rod (6), the telescopic end of which is fixedly connected to the lower mold cavity (3). During the telescopic process, the telescopic rod (6) drives the lower mold cavity (3) to move.

4. The long-stroke seamless tube demolding structure according to claim 1, characterized in that: A track device is provided between the upper part of the lower mold base (1) and the lower part of the lower mold cavity (3), and the track device provides a moving track for the lower mold cavity (3).

5. The long-stroke seamless tube demolding structure according to claim 4, characterized in that: The track device includes a track groove (7) and a track protrusion (8), the track groove (7) and the track protrusion (8) being configured to cooperate.

6. The long-stroke seamless tube demolding structure according to claim 5, characterized in that: The track groove (7) is located on the upper part of the lower mold base (1), and the track protrusion (8) is located on the lower part of the lower mold cavity (3).

7. The long-stroke seamless tube demolding structure according to claim 6, characterized in that: The width of the track protrusion (8) is greater than the width of the lower mold cavity (3).

8. The long-stroke seamless tube demolding structure according to claim 6, characterized in that: The height of the track protrusion (8) is equal to the depth of the track groove (7).

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