CN214211770U - Special tool and die for hot extrusion of large-size aluminum alloy seamless pipe - Google Patents
Special tool and die for hot extrusion of large-size aluminum alloy seamless pipe Download PDFInfo
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- CN214211770U CN214211770U CN202120150867.0U CN202120150867U CN214211770U CN 214211770 U CN214211770 U CN 214211770U CN 202120150867 U CN202120150867 U CN 202120150867U CN 214211770 U CN214211770 U CN 214211770U
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Abstract
A special tool and die for hot extrusion of large-size aluminum alloy seamless tubes belongs to the field of hot extrusion processing of seamless tubes. The utility model discloses a recipient, mould axle, mould, hollow servo needle, hollow extrusion pad and stripper bar, mould axle one end fixed mounting is on the mould axle bed, and the mould is installed to the mould axle other end, and the double-screw bolt end of stripper bar runs through behind the hollow extrusion pad to be connected with hollow servo needle one end screw-thread fit, and the setting of the hollow servo needle other end is inside the mould, and the recipient suit is in the outside of mould axle, mould, hollow servo needle, hollow extrusion pad and stripper bar. The utility model discloses the research and development purpose is in order to solve the in-process internal surface scotch of production major diameter tubular product and seriously lead to reducing the problem of machining precision, the utility model discloses a hollow follow-up needle work area bipyramid degree design has not only saved the steel use amount, and tubular product internal surface quality is showing and is improving moreover, is convenient for move back the needle, and simple structure, design benefit, easy dismounting, low cost are suitable for and use widely.
Description
Technical Field
The utility model relates to a big specification aluminum alloy seamless pipe hot extrusion special-purpose worker's mould belongs to seamless pipe hot extrusion processing field.
Background
The seamless tube is a long steel product with hollow section and no joint at the periphery, the hot extrusion processing technology of the seamless tube is a pressure processing forming method, a metal blank is placed in a pressure container, external force is applied to enable the metal to generate plastic deformation in a three-dimensional pressure stress state, and the metal is in the three-dimensional pressure stress state during extrusion processing, so that plastic deformation larger than rolling and forging can be obtained;
the head end and the tail end of a follow-up needle in a special extrusion die for the existing seamless tube hot extrusion processing technology have the same diameter, the inner surface of the tube is seriously scratched in the process of producing a large-diameter tube, the inner surface of the tube is tightly attached to the surface of the follow-up needle, but the inner surface of the tube is seriously scratched due to the sliding friction caused by the different speeds of the inner surface of the tube and the follow-up needle. Because the pipe material ejection of compact length is only about 2.8m, does not lean out the die shaft, the tractor can't the centre gripping, and the pipe material internal surface can't break away from with the follow-up needle surface after the extrusion, can pull back the pipe material when the follow-up needle withdraws back.
Therefore, a new tool and a new die special for hot extrusion of large-sized aluminum alloy seamless tubes are needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The present invention has been developed in order to solve the problem of the severe reduction in machining accuracy caused by the scratching of the inner surface during the production of large diameter pipes, and is hereinafter referred to as a brief summary of the present invention in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the utility model:
the utility model provides a special worker's mould of big specification aluminum alloy seamless pipe hot extrusion, including recipient, mould axle, mould, hollow follower pin, hollow extrusion pad and stripper bar, mould axle one end fixed mounting is on the mould axle bed, the mould is installed to the mould axle other end, the double-screw bolt end of stripper bar runs through behind the hollow extrusion pad and is connected with hollow follower pin one end screw-thread fit, the hollow follower pin other end sets up inside the mould, the recipient suit is in the outside of mould axle, mould, hollow follower pin, hollow extrusion pad and stripper bar.
Preferably: and a threaded hole is formed in one end of the hollow follow-up needle, a through hole is formed in the other end of the hollow follow-up needle, and the threaded hole is communicated with the through hole.
Preferably: the hollow follow-up needle 4 is of a four-step shaft structure, the first shaft section L1 and the second shaft section L2 are conical ends with angled side faces, and the third shaft section L3 and the fourth shaft section L4 are straight cylinder sections.
Preferably: the maximum cross-sectional area of the first shaft section L1 is smaller than that of the second shaft section L2, the maximum cross-sectional area of the second shaft section L2 is equal to that of the third shaft section L3, and the cross-sectional area of the fourth shaft section L4 is smaller than that of the third shaft section L3.
Preferably: the length of the first shaft section L1 is 620-560 mm, the side conical surface angle A is 0.5-0.03%, the length of the second shaft section L2 is 100-130 mm, the side conical surface angle B is 2-0.6%, the length of the third shaft section L3 is 180-200 mm, the diameter is phi 1, the length of the fourth shaft section L4 is 60-80 mm, the diameter is phi 2, and the ratio range of phi 1 to phi 2 is 1.1-1.4.
The utility model discloses a solve the problem of hollow follow-up needle centre gripping installation, propose the technical scheme of the utility model be:
the utility model provides a special worker's mould of big specification aluminum alloy seamless pipe hot extrusion, including recipient, mould axle, mould, hollow follower pin, hollow extrusion pad and stripper bar, mould axle one end fixed mounting is on the mould axle bed, the mould is installed to the mould axle other end, the double-screw bolt end of stripper bar runs through behind the hollow extrusion pad and is connected with hollow follower pin one end screw-thread fit, the hollow follower pin other end sets up inside the mould, the recipient suit is in the outside of mould axle, mould, hollow follower pin, hollow extrusion pad and stripper bar.
Preferably: and a threaded hole is formed in one end of the hollow follow-up needle, a through hole is formed in the other end of the hollow follow-up needle, and the threaded hole is communicated with the through hole.
Preferably: the hollow follow-up needle 4 is of a four-step shaft structure, the first shaft section L1 and the second shaft section L2 are conical ends with angled side faces, and the third shaft section L3 and the fourth shaft section L4 are straight cylinder sections.
Preferably: and a round angle R3 is machined at the joint of the third shaft section and the fourth shaft section.
Preferably: the fourth shaft section lateral surface processing has more than 2 clamping face.
The utility model discloses following beneficial effect has:
1. the utility model discloses a special worker's mould of large specification aluminum alloy seamless pipe hot extrusion, because whole follow-up needle design, there is not frictional force between hollow follow-up needle and the ingot casting, there is not the risk of broken needle, the extrusion force is showing and is reducing;
2. the utility model discloses a special worker's mould of large specification aluminum alloy seamless pipe hot extrusion, because there is not frictional force between follow-up needle and the ingot casting, the requirement for follow-up needle intensity is not high, design the follow-up needle to be hollow, reduced the steel use amount, reduce cost;
3. the utility model discloses a special mould of large-scale aluminum alloy seamless pipe hot extrusion, hollow follow-up needle work band bipyramid degree design has not only saved steel use amount, and surface quality is showing to be improved in the tubular product moreover, is convenient for move back the needle;
4. the utility model discloses a special worker's mould of big specification aluminum alloy seamless pipe hot extrusion, simple structure, design benefit, easy dismounting, low cost are suitable for using widely.
Drawings
FIG. 1 is a structural schematic view of a special tool and die for hot extrusion of a large-size aluminum alloy seamless pipe;
FIG. 2 is a view of the fitting of the hollow follower pin to the extrusion stem;
FIG. 3 is a block diagram of a hollow follower needle;
FIG. 4 is a cross-sectional view D-D of FIG. 3;
in the figure, 1-extrusion cylinder, 2-die shaft, 3-die, 4-hollow follow-up needle, 5-hollow extrusion pad, 6-extrusion rod, 7-die shaft seat, 8-hollow ingot, 9-seamless tube, 41-threaded hole, 42-through hole, 43-clamping surface, L1-first shaft section, L2-second shaft section, L3-third shaft section and L4-fourth shaft section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The utility model discloses the connection that mentions divide into fixed connection and can dismantle the connection, fixed connection is for the conventional fixed connection mode such as undetachable connection including but not limited to hem connection, rivet connection, adhesive connection and welded connection, can dismantle the connection including but not limited to conventional dismantlement modes such as threaded connection, buckle connection, pin joint and hinged joint, when not clearly prescribing a limit to concrete connection mode, acquiesces to always can find at least one kind of connected mode in current connected mode and can realize this function, and the technical staff in the art can select by oneself as required. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.
The first embodiment is as follows: the embodiment is described by combining fig. 1-4, the special die for hot extrusion of large-size aluminum alloy seamless tubes comprises an extrusion cylinder 1, a die shaft 2, a die 3, a hollow follow-up needle 4, a hollow extrusion pad 5 and an extrusion rod 6, one end of the die shaft 2 is fixedly arranged on a die shaft seat 7, the other end of the die shaft 2 is provided with the die 3, a screw column end 61 of the extrusion rod 6 penetrates through the hollow extrusion pad 5 and then is in threaded fit connection with one end of the hollow follow-up needle 4, the other end of the hollow follow-up needle 4 is arranged in the die 3, the extrusion cylinder 1 is sleeved outside the die shaft 2, the die 3, the hollow follow-up needle 4, the hollow extrusion pad 5 and the extrusion rod 6,
the seamless tube hot extrusion process is as follows: as shown in figure 1, when a seamless tube material 9 is extruded, the assembly sequence of an extrusion tool and a die is sequentially a die shaft 2, a die 3, a hollow follow-up needle 4, a hollow extrusion pad 5 and an extrusion rod 6 from left to right, a hollow cast ingot 8 is positioned between the die 2 and the hollow extrusion pad 5, and the hollow follow-up needle 4 penetrates through the center of the hollow follow-up needle and extends into a working belt of the die 3. During extrusion, the extrusion rod 6 provides extrusion force to push the hollow extrusion pad 5 to extrude the hollow cast ingot 8, and meanwhile, the extrusion container 1 moves along the extrusion direction at the same speed. It can be seen that the hollow follower needle 4, the hollow ingot 5 and the extrusion container 1 move in the same direction at the same speed, and are relatively static without friction. Along with the extrusion process, the product flows out from a closed ring formed by the working belt of the die 3 and the working belt on the surface of the hollow follow-up needle 4, namely the seamless tube 9, and passes through the middle of the die shaft 2 until the whole extrusion process is finished.
The second embodiment is as follows: the embodiment is described with reference to fig. 1 to 4, and the tool and die special for hot extrusion of the large-size aluminum alloy seamless tube of the embodiment has a threaded hole 41 formed inside one end of the hollow follower pin 4, a through hole 42 formed inside the other end of the hollow follower pin, and the threaded hole 41 is communicated with the through hole 42.
The third concrete implementation mode: the present embodiment is described with reference to fig. 1 to 4, and the hollow follower pin 4 of the present embodiment is a four-step shaft structure, the first shaft section L1 and the second shaft section L2 are cone ends with angles on the side surfaces, and the third shaft section L3 and the fourth shaft section L4 are straight sections.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 to 4, and the maximum cross-sectional area of the first shaft section L1 is smaller than the maximum cross-sectional area of the second shaft section L2, the maximum cross-sectional area of the second shaft section L2 is equal to the cross-sectional area of the third shaft section L3, and the cross-sectional area of the fourth shaft section L4 is smaller than the cross-sectional area of the third shaft section L3;
the outer side wall of the hollow follow-up needle 4, namely the working belt, is redesigned to be double-taper, as shown in figure 2, the first shaft section of the hollow follow-up needle 4 is designed with a first-stage slight taper with the length of 0.043 degrees and the length of 590mm, along with the extrusion process, the outer diameter of the seamless tube 9 is unchanged, the wall thickness is thinned, the inner diameter is slowly enlarged, the gap between the inner surface of the seamless tube 9 and the surface of the hollow follow-up needle 4 is enlarged, the seamless tube and the hollow follow-up needle are gradually separated from each other and are not in contact with each other, sliding friction does not exist, the quality of the inner surface of the seamless tube 9 is obviously improved, and because the taper is small, the wall thickness of the seamless tube 9 cannot be greatly influenced. The second shaft section of the hollow follow-up needle 4 is designed with a second-stage taper with the length of 0.907 degrees and the length of 120mm, the inner diameter of the seamless tube 9 with the length of 600mm is increased more obviously, the needle can be retracted easily when withdrawn, and the phenomenon that the seamless tube 9 is pulled back can not happen. Although the wall thickness of the seamless tube 9 within 600mm is thin and does not conform to the dimensional tolerance, the quality of the seamless tube 9 is not affected by the length within the range of the cut-off length.
In addition, due to the design of the whole-course follow-up needle, no friction force exists between the hollow follow-up needle 4 and the hollow cast ingot 8, the risk of needle breakage does not exist, the extrusion force is obviously reduced, the requirement on the strength of the hollow follow-up needle 4 is low because no friction force exists between the hollow follow-up needle 4 and the hollow cast ingot 8, the hollow follow-up needle 4 can be designed to be hollow, the use amount of steel is reduced, and the cost is reduced.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1-4, and the special tool for hot extrusion of the large-size aluminum alloy seamless pipe of the embodiment comprises a first axial section L1 with a length of 620-560 mm, a side cone angle A of 0.5-0.03%, a second axial section L2 with a length of 100-130 mm, a side cone angle B of 2-0.6%, a third axial section L3 with a length of 180-200 mm and a diameter of phi 1, a fourth axial section L4 with a length of 60-80 mm and a diameter of phi 2, and the ratio of phi 1 to phi 2 is 1.1-1.4.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1 to 4, and the tool and die special for hot extrusion of the large-size aluminum alloy seamless tube of the embodiment is characterized in that a fillet R3 is machined at the joint of the third shaft section L3 and the fourth shaft section L4.
The seventh embodiment: the embodiment is described with reference to fig. 1 to 4, and the outer side surface of the fourth shaft section L4 of the special die for hot extrusion of the large-size aluminum alloy seamless tube of the embodiment is provided with more than 2 clamping surfaces 43 for facilitating clamping, tightening and installation of the hollow follower pin 4.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a special mould of big specification aluminum alloy seamless pipe hot extrusion which characterized in that: including recipient (1), mould axle (2), mould (3), hollow servo needle (4), hollow extrusion pad (5) and stripper bar (6), mould axle (2) one end fixed mounting is on mould axle bed (7), mould (3) are installed to the mould axle (2) other end, screw end (61) of stripper bar (6) run through behind hollow extrusion pad (5) and are connected with hollow servo needle (4) one end screw-thread fit, hollow servo needle (4) other end sets up inside mould (3), recipient (1) suit is in mould axle (2), mould (3), hollow servo needle (4), the outside of hollow extrusion pad (5) and stripper bar (6).
2. The special tool and die for hot extrusion of the large-size aluminum alloy seamless tube according to claim 1, wherein the special tool and die comprises: a threaded hole (41) is formed in one end of the hollow follow-up needle (4) in an internal processing mode, a through hole (42) is formed in the other end of the hollow follow-up needle in an internal processing mode, and the threaded hole (41) is communicated with the through hole (42).
3. The special tool and die for hot extrusion of the large-size aluminum alloy seamless tube according to claim 2, wherein the special tool and die comprises: the hollow follow-up needle (4) is of a four-step shaft structure, the first shaft section (L1) and the second shaft section (L2) are conical ends with angled side faces, and the third shaft section (L3) and the fourth shaft section (L4) are straight tube sections.
4. The special tool and die for hot extrusion of the large-size aluminum alloy seamless tube according to claim 3, wherein the special tool and die comprises: the maximum cross-sectional area of the first shaft section (L1) is smaller than the maximum cross-sectional area of the second shaft section (L2), the maximum cross-sectional area of the second shaft section (L2) is equal to the cross-sectional area of the third shaft section (L3), and the cross-sectional area of the fourth shaft section (L4) is smaller than the cross-sectional area of the third shaft section (L3).
5. The special tool and die for hot extrusion of the large-size aluminum alloy seamless tube according to claim 3, wherein the special tool and die comprises: the length of the first shaft section (L1) is 620-560 mm, the angle A of the side conical surface is 0.5-0.03 degrees, the length of the second shaft section (L2) is 100-130 mm, the angle B of the side conical surface is 2-0.6 degrees, the length of the third shaft section (L3) is 180-200 mm, the diameter is phi 1, the length of the fourth shaft section (L4) is 60-80 mm, the diameter is phi 2, and the ratio range of phi 1 to phi 2 is 1.1-1.4.
6. The special tool and die for hot extrusion of the large-size aluminum alloy seamless tube according to claim 5, wherein the special tool and die comprises: the joint of the third shaft section (L3) and the fourth shaft section (L4) is machined with a fillet R3.
7. The special tool and die for hot extrusion of the large-size aluminum alloy seamless tube according to claim 3, wherein the special tool and die comprises: the outer side surface of the fourth shaft section (L4) is provided with more than 2 clamping surfaces (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120150867.0U CN214211770U (en) | 2021-01-20 | 2021-01-20 | Special tool and die for hot extrusion of large-size aluminum alloy seamless pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120150867.0U CN214211770U (en) | 2021-01-20 | 2021-01-20 | Special tool and die for hot extrusion of large-size aluminum alloy seamless pipe |
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| Publication Number | Publication Date |
|---|---|
| CN214211770U true CN214211770U (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120150867.0U Active CN214211770U (en) | 2021-01-20 | 2021-01-20 | Special tool and die for hot extrusion of large-size aluminum alloy seamless pipe |
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| CN (1) | CN214211770U (en) |
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- 2021-01-20 CN CN202120150867.0U patent/CN214211770U/en active Active
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Address after: No.5, Hanan 8th Avenue, core area of Hanan industrial new town, Harbin City, Heilongjiang Province Patentee after: Guangzhi Technology Co.,Ltd. Address before: No.5, Hanan 8th Avenue, core area of Hanan industrial new town, Harbin City, Heilongjiang Province Patentee before: HARBIN ZHONGFEI NEW TECHNOLOGY Co.,Ltd. |