Lower mold splitting and demolding structure for long-stroke seamless tube

Abstract

The utility model discloses a long-stroke seamless tube lower mold splitting and demolding structure which is characterized in that an upper mold column can punch downwards under the action of a power mechanism, a plurality of detachable and closed peripheral mold plates are arranged on the periphery of a lower mold plate, a plurality of mold splitting power devices are arranged on a lower mold base, and a moving device is arranged between the peripheral mold plates and the lower mold base; the mold splitting power device is respectively connected with each peripheral mold plate, the mold splitting power device drives the peripheral mold plates to perform opening and closing movement through the moving device, the peripheral mold plates are opened by mold splitting, and the seamless pipe can be taken out from a neutral position of the peripheral mold plates, so that 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. The section of the lower template is trapezoidal, the lower area of the lower template is larger than the upper area, and the stress performance of the lower template is improved.

Description

TECHNICAL FIELD

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

[0002] Seamless tube is a kind of long strip steel with hollow section, and the periphery has no joint, and its material can be carbon steel, alloy steel or stainless steel etc.Different from welded steel 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 steel 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.Heated billet is rolled, then shaped by shaper, and finally cooled.The wall thickness of seamless tube produced by rolling method is uniform, but the production efficiency is low.

[0005] 2, extrusion method: extrusion method is to produce seamless steel pipe by pressing heated billet 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 heated billet into tubular shape.The wall thickness of 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.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 heated billet.The wall thickness of seamless tube produced by forging method is uniform, and the surface is smooth, pore-free and impurity-free, with high toughness and high strength.But the production cost of forging method is relatively high, and it is only suitable for small-scale production of seamless tube.

[0008] In the related forging method for producing seamless tube, the seamless tube forging machine includes upper die seat and lower die seat, and the upper die seat and the lower die seat are provided with upper die column and lower die cavity, and the 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 seamless tube of corresponding specification can be produced.

[0009] For example, Figure 1As shown, after the seamless tube is completed by stamping, the seamless tube follows the upward movement of the upper die post, and when the upper die post rises to the top end, the distance H from the bottom of the upper die post to 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, and therefore the processing length L of the seamless tube is limited by the distance H from the bottom of the upper die post to the top of the lower die cavity.

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

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

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

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

[0014] A long-stroke seamless tube lower split die demolding structure, comprising a lower die seat and an upper die seat, wherein the upper die seat is provided with an upper die post connected with a power mechanism at the lower part, the upper die post can be downwardly stamped under the action of the power mechanism, the lower die cavity comprises a lower die plate located at the center of the lower part, a plurality of peripheral die plates which can be separated and closed are arranged around the lower die plate, the lower die plate and the peripheral die plates form a complete lower die cavity in a closed state, a plurality of split die power devices are arranged on the lower die seat, a moving device is arranged between the peripheral die plates and the lower die seat, the split die power devices are connected with each peripheral die plate respectively, and the split die power devices drive the peripheral die plates to open and close through the moving device.

[0015] As a further scheme of the application, the lower die cavity comprises 2-4 peripheral die plates.

[0016] As a further scheme of the application, the split die power device comprises a hydraulic cylinder.

[0017] As a further scheme of the application, the peripheral die plate and the lower die plate are respectively provided with a joint surface at the joint, and the joint surface is outwardly inclined.

[0018] As a further scheme of the application, the moving device comprises a convex moving track, and the moving track is matched with a concave moving groove.

[0019] As a further scheme of the present application: the lower die cavity is provided with a matched sheath outside the four sides, the lower die seat is provided with a lifting power device at the lower part, the lifting power device is connected with the sheath, and the lifting power device can drive the sheath to move up and down to separate or cover the lower die cavity.

[0020] As a further scheme of the present application: the lifting power device comprises a hydraulic cylinder.

[0021] In summary, the present application has the following beneficial effects:

[0022] 1. The long-stroke seamless pipe parting die releasing structure, the upper die column can be downwardly punched under the action of a power mechanism, the lower die cavity comprises a lower die plate located at the center of the lower part, a plurality of separable and closable peripheral die plates are arranged around the lower die plate, the lower die plate and the peripheral die plates are closed to form a complete lower die cavity, a plurality of parting power devices are arranged on the lower die seat, a moving device is arranged between the peripheral die plates and the lower die seat, the parting power devices are connected with each peripheral die plate respectively, the parting power devices drive the peripheral die plates to open and close through the moving device, the peripheral die plates are opened by parting, and the seamless pipe can be taken out from the gap of the peripheral die plates, the releasing distance of the seamless pipe is increased, when the upper die column is lifted to the top end, the distance H from the bottom of the upper die column to the top of the lower die cavity plus 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, and thus the processable length of the seamless pipe is improved.

[0023] 2. The peripheral die plates and the lower die plate are respectively provided with a joint surface at the joint, the joint surface is outwardly inclined around the four sides, the cross section of the lower die plate is trapezoidal, and the area of the lower part of the lower die plate is larger than that of the upper part, and thus the stress performance of the lower die plate is improved.

[0024] 3. The moving device comprises a convex moving track and a concave moving groove matched with the moving track, the moving device is simple in structure, convenient to process and stable in operation.

[0025] 4. The lower die cavity is provided with a matched sheath outside the four sides, the sheath can surround the outside of the lower die cavity to increase the stress capacity of the lower die cavity, the sheath can efficiently protect the lower die cavity, the lifting power device is connected with the sheath, and the lifting power device can drive the sheath to move up and down to separate or cover the lower die cavity according to the seamless pipe processing process. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, which are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation to the present application.

[0027] In the drawings:

[0028] Figure 1 It is a structural schematic view of a conventional seamless pipe forging machine.

[0029] Figure 2 A structure diagram of the mold clamping of the long-stroke seamless pipe lower parting mold stripping structure of the present application.

[0030] Figure 3 A structure diagram of the mold parting of the long-stroke seamless pipe lower parting mold stripping structure of the present application.

[0031] Figure 4 A structure diagram of the moving device of the long-stroke seamless pipe lower parting mold stripping structure of the present application.

[0032] Figure 5 A structure diagram of the diagonal setting mold parting power device of the long-stroke seamless pipe lower parting mold stripping structure of the present application.

[0033] Legend:

[0034] 1, lower mold base; 2, upper mold base; 3, lower mold cavity; 31, lower mold plate; 32, peripheral mold plate; 33, joint surface; 4, upper mold column; 5, mold parting power device; 6, moving device; 61, moving track; 62, moving groove; 7, sheath; 8, lifting power device; DETAILED DESCRIPTION

[0035] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals represent like elements, unless the context dictates otherwise. The following description of exemplary embodiments is not representative of all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present embodiments as detailed in the appended claims.

[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 reference to the orientation of the figures at the time of illustration. Because these orientations can change, the relative positions of these directions can change accordingly.

[0037] In addition, the descriptions such as "first", "second" and the like in the embodiments are only for the purpose of description and do not mean to particularly indicate the order or sequence, nor to limit the present application, which are merely to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly 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 fact that a person skilled in the art can realize it, and 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, nor within the protection scope required by the present application.

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

[0039] As shown in the drawings: Figures 2-5

[0040] The long-stroke seamless pipe lower mold parting and demolding structure comprises a lower mold base 1 and an upper mold base 2. The upper part of the lower mold base 1 is provided with a lower mold cavity 3, which is a U-shaped cavity structure. The lower part of the upper mold base 2 is provided with an upper mold column 4 connected with a power mechanism. The upper mold column 4 can be downwardly punched under the action of the power mechanism. The power mechanism is a commonly used hydraulic or pneumatic power mechanism, which can drive the upper mold column 4 to move up and down.

[0041] The lower mold cavity 3 comprises a lower mold plate 31 located at the center of the lower part. A plurality of peripheral mold plates 32 which can be separated and closed are arranged around the lower mold plate 31. The lower mold plate 31 and the plurality of peripheral mold plates 32 are closed to form a complete lower mold cavity 3. A plurality of mold parting power devices 5 are arranged on the upper mold base 1. A moving device 6 is arranged between the peripheral mold plate 32 and the lower mold base 1. The mold parting power device 5 is connected with each peripheral mold plate 32 respectively. The mold parting power device 5 drives the peripheral mold plate 32 to open and close through the moving device 6. The peripheral mold plate 32 moves to realize mold parting. After mold parting, the seamless pipe is easily demolded and taken down.

[0042] The lower mold cavity 3 comprises 2-4 peripheral mold plates 32. The lower mold cavity 3 shown in the drawings comprises four peripheral mold plates 32 arranged averagely.

[0043] Preferably, the mold parting power device 5 comprises a hydraulic cylinder. The hydraulic cylinder has abundant power, stable work and simple operation.

[0044] Preferably, the peripheral mold plate 32 and the lower mold plate 31 are respectively provided with a joint surface 33 at the joint. The joint surface 33 is inclined to the outside. The cross section of the lower mold plate 31 is trapezoidal. The area of the lower part of the lower mold plate 31 is larger than that of the upper part, which increases the stress performance of the lower mold plate 31.

[0045] ​Preferably, the moving device 6 includes a protruding moving track 61 , and the moving track 61 is matched with a recessed moving groove 62 .

[0046] A matching protective cover 7 is provided around the outer side of the lower mold cavity 3, and a lifting power device 8 is provided at the lower part of the upper mold base 2. The lifting power device 8 is connected to the protective cover 7. The lifting power device 8 can drive the protective cover 7 to move up and down to separate from or cover the lower mold cavity 3. The protective cover 7 can protect the lower mold cavity 3 from lateral forces.

[0047] The lifting power unit 8 comprises a hydraulic cylinder. The hydraulic cylinder is powerful, stable in operation and easy to operate.

[0048] like Figure 5 As shown, the lower die base 1 is rectangular, and four parting power devices 5 are provided at the four diagonal positions of the lower die base 1. The four parting power devices 5 pull the peripheral template 32 apart along the diagonal line. The peripheral template 32 has a larger parting distance, which makes it easier to remove the seamless pipe.

[0049] In practical applications:

[0050] The upper die column 4 can punch downward to forge the seamless pipe under the action of the power mechanism. The lower die cavity 3 includes a lower die plate 31 located at the lower center. A plurality of detachable and closable peripheral die plates 32 are arranged around the lower die plate 31. The lower die plate 31 and the plurality of peripheral die plates 32 are closed to form a complete lower die cavity 3. A plurality of splitting power devices 5 are provided on the lower die base 1. A moving device 6 is provided between the peripheral die plates 32 and the lower die base 1. The splitting power devices 5 are respectively connected to each peripheral die plate 32. The splitting power devices 5 drive the peripheral die plates 32 to open and close through the moving device 6. The peripheral die plates 32 are opened by splitting, and the seamless pipe can be taken out from the gap of the peripheral die plates 32, thereby increasing the demolding distance of the seamless pipe. When the upper die column 4 rises to the top, the distance H from the bottom of the upper die column 4 to the top of the lower die cavity 3 + the height S of the lower die cavity 3 can be approximately the processable length L of the seamless pipe, that is, the processable length L of the seamless pipe can be increased to approximately H+S, thereby increasing the processing length of the seamless pipe.

[0051] The cross section of the lower template 31 is trapezoidal, and the lower area of ​​the lower template 31 is larger than the upper area, thereby increasing the force-bearing performance of the lower template 31 .

[0052] The moving device 6 includes a raised moving track 61 and a recessed moving groove 62. The moving device 6 has a simple structure, is easy to manufacture, and operates stably.

[0053] A matching sheath 7 is provided around the outer side of the lower mold cavity 3. The outer sheath can surround the outer side of the lower mold cavity 3 to increase the force-bearing capacity of the lower mold cavity 3. The sheath 7 can effectively protect the lower mold cavity 3. The lifting power device 8 is connected to the sheath 7. The lifting power device 8 can drive the sheath 7 to move up and down in accordance with the seamless pipe processing technology to separate from or protect the lower mold cavity 3.

[0054] Finally, it should be noted that the above disclosure only refers to the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features thereof. Any modification, equivalent replacement, improvement, etc. 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 pipe lower parting and demoulding structure, comprising a lower die base (1) and an upper die base (2), wherein the upper portion of the lower die base (1) is provided with a lower die cavity (3), and the lower die cavity (3) is a U-shaped cavity structure, and the lower portion of the upper die base (2) is provided with an upper die column (4) connected to a power mechanism, and the upper die column (4) can be punched downward under the action of the power mechanism, characterized in that: The lower mold cavity (3) comprises a lower mold plate (31) located at the lower center, a plurality of detachable and closure peripheral mold plates (32) are arranged around the lower mold plate (31), the lower mold plate (31) and the plurality of peripheral mold plates (32) are closed to form the complete lower mold cavity (3), a plurality of mold splitting power devices (5) are provided on the lower mold base (1), a moving device (6) is provided between the peripheral mold plates (32) and the lower mold base (1), the mold splitting power device (5) is respectively connected to each of the peripheral mold plates (32), and the mold splitting power device (5) drives the peripheral mold plates (32) to open and close through the moving device (6).

2. The long-stroke seamless pipe lower parting and demoulding structure according to claim 1, characterized in that: The lower mold cavity (3) includes 2-4 peripheral mold plates (32).

3. The long-stroke seamless pipe lower parting and demoulding structure according to claim 1, characterized in that: The mold splitting power device (5) comprises a hydraulic cylinder.

4. The long-stroke seamless pipe lower parting and demoulding structure according to claim 1, characterized in that: The peripheral template (32) and the lower template (31) are respectively provided with a joining surface (33) at the joining position, and the joining surface (33) is inclined toward the outer sides.

5. The long-stroke seamless pipe lower parting and demoulding structure according to claim 1, characterized in that: The moving device (6) comprises a raised moving track (61), and the moving track (61) is matched with a recessed moving groove (62).

6. The long-stroke seamless pipe lower parting and demoulding structure according to claim 1, characterized in that: A matching protective sleeve (7) is provided around the outer side of the lower mold cavity (3), and a lifting power device (8) is provided at the lower part of the upper mold base (2). The lifting power device (8) is connected to the protective sleeve (7), and the lifting power device (8) can drive the protective sleeve (7) to move up and down to separate from or cover the lower mold cavity (3).

7. The long-stroke seamless pipe lower parting and demoulding structure according to claim 6, characterized in that: The lifting power device (8) comprises a hydraulic cylinder.

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