CN114378235A - Forming device and method for thick-wall pipe nozzle of pipeline - Google Patents
Forming device and method for thick-wall pipe nozzle of pipeline Download PDFInfo
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- CN114378235A CN114378235A CN202210015426.9A CN202210015426A CN114378235A CN 114378235 A CN114378235 A CN 114378235A CN 202210015426 A CN202210015426 A CN 202210015426A CN 114378235 A CN114378235 A CN 114378235A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001125 extrusion Methods 0.000 claims abstract description 74
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 230000006698 induction Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 8
- 238000007493 shaping process Methods 0.000 abstract description 8
- 230000007547 defect Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract description 3
- 230000008520 organization Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 9
- 238000003466 welding Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 2
- 238000001192 hot extrusion Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- 229920006395 saturated elastomer Polymers 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/14—Making machine elements fittings
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Abstract
The invention relates to the technical field of pipeline forming, and discloses a device and a method for forming a thick-wall pipe nozzle of a pipeline. That is, the invention can form the pipe nozzle meeting the design requirement at one time without repeatedly heating and extruding the pipe wall, thereby avoiding the abnormal grain size of the material caused by repeatedly heating, ensuring the product quality of the pipe nozzle formed on the pipeline to be formed, improving the qualification rate of finished products and reducing the production cost of the products. Because the top of extrusion drift is provided with the direction boss, consequently at the in-process of mouthpiece extrusion, the project organization of extrusion drift can prevent that the mouthpiece from appearing the wall thickness inhomogeneous, the shaping height is not enough and surface defect scheduling problem, guarantees the shaping quality of mouthpiece.
Description
Technical Field
The invention relates to the technical field of pipeline forming, in particular to a device and a method for forming a thick-wall nozzle of a pipeline.
Background
The main steam super pipeline of the Hualong I pressurized water reactor nuclear power unit is a section of saturated steam pipeline from a containment mechanical penetrating piece of a main steam pipeline to a first welding seam at the downstream of a transverse limiting piece of the main steam pipeline outside a reactor containment. A plurality of process nozzles with different sizes are arranged on the super pipeline, and the thick-wall nozzles on the super pipeline are difficult to form.
The engineering is realized by adopting a method of welding a branch pipe table, hot extrusion or machining by a pipe forging machine. The welding method easily causes the problems of uneven overall performance of materials, welding defects at welding seams and the like, and the welding seams of the pipeline and the nozzle are easily corroded, so that the pipeline is fatigue-ineffective, and great potential safety hazards exist for nuclear power operation. The traditional hot extrusion process can form a single nozzle only by multiple times of extrusion, the grain size of the nozzle is not easy to control in the multiple extrusion heating process, the structure of an extrusion punch head easily causes that the whole fiber tissue of the nozzle cannot be synchronously and uniformly changed, the quality of the formed nozzle is poor, and the surface defects of folds, galling and the like are easy to appear on the inner surface of the nozzle. The pipe nozzle is manufactured by a forging process, the size of the pipe nozzle is realized by machining, the machining amount is large, the production period is long, in addition, in order to meet the height of the machined pipe nozzle, the wall thickness of a pipeline needs to be increased, and the waste of raw materials is serious.
Therefore, a method for forming a thick-walled nozzle of a pipeline is needed to solve the above problems.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a device and a method for forming a thick-walled pipe nozzle of a pipe, which can form a thick-walled pipe nozzle meeting requirements at one time with a simple forming process and a good forming quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
in one aspect, a forming device for a thick-wall nozzle of a pipeline is provided, which comprises:
the top of the extrusion punch is provided with a guide boss, and a to-be-formed pipeline is provided with a prefabricated hole;
the heating module is used for heating the prefabricated hole of the pipeline to be molded;
the outer die can be attached to the outer wall of the pipeline to be formed and is opposite to the prefabricated hole;
the driving piece, its output with the extrusion drift is connected, the driving piece can drive the extrusion drift removes, so that the extrusion drift passes through the direction boss stretches into after the heating prefabricated hole to the extrusion forms the mouthpiece.
In a preferred embodiment of the forming apparatus of the pipe thick-walled nozzle according to the present invention, the extrusion punch includes a first punch portion and a second punch portion connected to each other, an outer surface of the first punch portion is a semi-ellipsoid, and the guide boss is disposed at an end of the first punch portion away from the second punch portion.
In the molding apparatus of the pipe thick-walled nozzle according to the present invention, the cross-sectional area of the guide boss and the cross-sectional area of the first punch portion are each gradually reduced from the bottom to the top.
In the molding apparatus of the pipe thick-walled nozzle according to the present invention, the second punch portion is a cylindrical body, and the diameter of the second punch portion is equal to the inner diameter of the nozzle.
As a preferable mode of the forming device of the pipe thick-wall nozzle of the present invention, the preformed hole is an elliptical hole, a long axis of the elliptical hole is along an axial direction of the pipe to be formed, and a top surface of the guide boss is elliptical.
The preferable scheme of the forming device of the pipeline thick-wall nozzle further comprises a centering module, and the centering module is used for calibrating the position of the outer die so as to enable the outer die to be opposite to the prefabricated hole.
As a preferable aspect of the forming device of the pipeline thick-wall nozzle of the present invention, the centering module includes a positioning seat and a positioning column disposed on the positioning seat, and the positioning column can penetrate through the prefabricated hole.
In a preferred embodiment of the molding apparatus for a thick pipe nozzle according to the present invention, the heating module includes a medium frequency induction heating coil, and the heating temperature of the medium frequency induction heating coil is in a range of 750 to 1000 ℃.
As a preferable scheme of the forming device of the pipeline thick-wall nozzle, the outer die is provided with a positioning groove, the inner side wall surface of the positioning groove is an arc surface, and the arc surface can be attached to the outer wall of the pipeline to be formed.
On the other hand, the forming method of the pipeline thick-wall nozzle adopts the forming device of the pipeline thick-wall nozzle, and comprises the following steps:
s1, forming a prefabricated hole at a preset position of the pipeline to be formed;
s2, heating the prefabricated hole part of the pipeline to be molded through the heating module;
s3, mounting the extrusion punch at the output end of the driving piece, and adjusting the position of the extrusion punch so that the guide boss at the top of the extrusion punch is opposite to the prefabricated hole;
s4, placing the outer die above the pipeline to be formed, opposite to the prefabricated hole, moving the outer die downwards and enabling the outer die to be attached to the outer wall of the pipeline to be formed;
and S5, starting the driving piece to enable the extrusion punch to gradually extend into the prefabricated hole through the guide boss until the extrusion punch extrudes on the pipe wall of the pipe to be formed to form the pipe nozzle.
The invention has the beneficial effects that:
the invention provides a device and a method for forming a thick-wall pipe nozzle of a pipeline. That is to say, the forming method of the pipeline thick-wall nozzle can form the nozzle meeting the design requirements at one time without repeatedly heating and extruding the pipe wall, thereby avoiding the abnormal grain size of the material caused by repeated heating, ensuring the product quality of the molded nozzle on the pipeline to be molded, improving the qualification rate of finished products and reducing the production cost of the products. In addition, because the top of extrusion drift is provided with the direction boss, consequently at the in-process of nozzle extrusion, the project organization of extrusion drift can prevent that the nozzle from appearing the problem such as wall thickness is inhomogeneous, the shaping height is not enough and surface defect, guarantees the shaping quality of nozzle.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic structural view of an extrusion punch according to an embodiment of the present invention;
FIG. 2 is an isometric view of a centering module provided in accordance with an embodiment of the present invention;
FIG. 3 is a bottom view of a centering module provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic view of the installation of the apparatus for forming a thick-walled nozzle for a pipeline according to the embodiment of the present invention.
In the figure:
1-extruding a punch; 2-external mold; 3-a driving member; 4-a centering module;
11-a first punch portion; 12-a second punch portion; 13-a guide boss;
21-positioning a groove; 211-arc surface; 22-positioning through holes;
31-an object stage;
41-positioning seat; 42-a positioning column;
100-a pipe to be formed; 101-pre-drilling holes.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 4, the present embodiment provides a molding device of a pipe thick-wall nozzle, which includes an extrusion punch 1, a heating module, an outer die 2 and a driving member 3.
Wherein, the top of the extrusion punch 1 is provided with a guide boss 13, and a prefabricated hole 101 is arranged on the pipeline 100 to be formed. The heating module is used for heating the preformed hole 101 of the pipeline 100 to be formed. The outer mold 2 can be attached to the outer wall of the pipe 100 to be formed and is opposite to the preformed hole 101. The output end of the driving piece 3 is connected with the extrusion punch 1, and the driving piece 3 can drive the extrusion punch 1 to move, so that the extrusion punch 1 extends into the heated prefabricated hole 101 through the guide boss 13 and is extruded to form a nozzle.
When the forming device of the pipeline thick-wall nozzle is used, the prefabricated hole 101 of the pipeline 100 to be formed is heated through the heating module, then the driving piece 3 is started, the extrusion punch 1 gradually extends into the prefabricated hole 101 through the guide boss 13, the pipe wall at the prefabricated hole 101 is extruded and deformed under the combined action of the extrusion punch 1 and the outer die 2, and therefore the nozzle meeting the design requirements is extruded and formed on the pipeline 100 to be formed. That is to say, can once only take shape out the mouthpiece that accords with the designing requirement through the forming device of this pipeline thick wall mouthpiece, need not the repeated heating and extrudees the pipe wall, avoided because of the material grain size that the repeated heating caused is unusual to can guarantee to treat the product quality after the nozzle shaping on the shaping pipeline 100, improve the finished product qualification rate, reduce the manufacturing cost of product. In addition, because the top of the extrusion punch 1 is provided with the guide boss 13, the design structure of the extrusion punch 1 can prevent the problems of uneven wall thickness, insufficient forming height, surface defect and the like of the nozzle in the extrusion forming process of the nozzle, and the forming quality of the nozzle is ensured.
In the present embodiment, referring to fig. 4, the driving member 3 is preferably a hydraulic driving device (e.g. a hydraulic cylinder), the extrusion punch 1 is mounted on a stage 31 of the hydraulic driving device, and the hydraulic driving device can drive the extrusion punch 1 to move up and down, so that the extrusion punch 1 extends into the preformed hole 101 through the guiding boss 13 and pushes up the pipe wall at the preformed hole 101, thereby forming the nozzle by co-action with the outer die 2.
Alternatively, referring to fig. 1, the extrusion punch 1 includes a first punch portion 11 and a second punch portion 12 connected to each other, an outer surface of the first punch portion 11 is a semi-ellipsoid, and a guide boss 13 is disposed at an end of the first punch portion 11 away from the second punch portion 12. In this embodiment, the first punch part 11 is a semi-ellipsoid, the outer contour of the cross section of the first punch part is parabolic, the guide boss 13 is located at the top of the semi-ellipsoid, and the guide boss 13 and the semi-ellipsoid are in smooth transition. After the driving member 3 drives the extrusion punch 1 to move upwards to make the guide boss 13 extend into the preformed hole 101, in the process that the extrusion punch 1 continues to move, the preformed hole 101 of the pipeline 100 to be formed protrudes outwards due to the thrust of the extrusion punch 1, so that the nozzle is formed. The design mode of the outer contour of the first punch part 11 enables the pipe wall of the pipeline 100 to be formed in the extrusion process to be synchronously deformed, and ensures that the fiber tissues of the materials can be orderly connected together, so that the thick-wall nozzle meeting the design requirements is formed in one step, and the surface quality of the formed nozzle is good. The curved surface structure of the outer contour of the first punch part 11 can enable the forming height and the nozzle thickness of the nozzle to meet the design requirements, and the forming height of the nozzle is prevented from being inconsistent.
Optionally, referring to fig. 1, the cross-sectional area of the guide boss 13 and the cross-sectional area of the first punch part 11 are gradually reduced from bottom to top, so that the fiber tissue of the pipe wall material can be orderly connected together in the process of extruding the pipe wall by the extrusion punch 1, thereby forming the pipe nozzle meeting the design requirement at one time and avoiding the unqualified pipe nozzle forming caused by sudden change of the pipe wall stress.
Alternatively, referring to fig. 1, the second punch portion 12 is a cylinder, and the diameter of the second punch portion 12 is equal to the inner diameter of the nozzle. When the driving piece 3 lifts the extrusion punch 1 to the preset position, the nozzle is formed. The diameter size of the second punch part 12 is consistent with the inner diameter size of the nozzle, so that the molded nozzle can be ensured to just meet the design requirements.
In this embodiment, the first punch part 11, the second punch part 12 and the guide boss 13 are integrally formed, so that the overall strength of the extrusion punch 1 and the overall smoothness and continuity of the extrusion punch 1 can be ensured, and the pipe wall of the pipeline 100 to be formed is uniformly stressed in the extrusion process.
Alternatively, the preformed holes 101 are elliptical holes, the major axes of which are along the axial direction of the pipe 100 to be formed. The pipe 100 to be formed is provided with the oval-shaped prefabricated hole 101, so that the problem that the forming height of the pipe nozzle in the radial direction of the pipe 100 to be formed is insufficient is effectively solved. Referring to fig. 1, the top surface of the guide boss 13 is also elliptical to adapt to the shape of the preformed hole 101, so as to ensure that the guide boss 13 can smoothly extend into the preformed hole 101.
Optionally, referring to fig. 4, the outer die 2 is provided with a positioning groove 21, an inner side wall surface of the positioning groove 21 is an arc surface 211, and the arc surface 211 of the positioning groove 21 can be attached to an outer wall of the pipe 100 to be formed. The outer die 2 is used for fixing the pipeline 100 to be formed immovably, and when the pipe wall is extruded by the extrusion punch 1, the pipe wall protrudes outwards and extends into the positioning groove 21 to form a pipe nozzle, and the pipe nozzle is convexly arranged on the pipe wall of the pipeline 100 to be formed. The outer surface of the molded nozzle is attached to the arc-shaped side wall of the positioning groove 21, the inner wall surface of the nozzle is attached to the outer peripheral surface of the extrusion punch 1, and the outer die 2 and the extrusion punch 1 act together to form the preformed nozzle.
Optionally, referring to fig. 2 and 3, the forming device of the pipeline thick-wall nozzle further comprises a centering module 4, wherein the centering module 4 is used for calibrating the position of the outer die 2 so that the outer die 2 is opposite to the prefabricated hole 101. Further, the centering module 4 includes a positioning seat 41 and a positioning column 42 disposed on the positioning seat 41, and a cross-sectional shape of the positioning column 42 is the same as that of the preformed hole 101, and is an ellipse, so that the positioning column 42 can penetrate through the preformed hole 101. Specifically, referring to fig. 4, the outer mold 2 is further provided with a positioning through hole 22, the positioning through hole 22 is communicated with the positioning groove 21, when the position of the outer mold 2 is calibrated, the positioning column 42 of the centering module 4 is inserted into the prefabricated hole 101 to fix the centering module 4 on the pipeline 100 to be formed, and then the outer mold 2 is moved downward, so that the positioning seat 41 of the centering module 4 sequentially extends into the positioning groove 21 and the positioning through hole 22, that is, the outer mold 2 is ensured to be aligned with the prefabricated hole 101, and the nozzle is ensured to meet the design requirement after being formed. And after the outer die 2 is positioned, the centering module 4 is taken out, and the nozzle forming operation can be carried out.
Optionally, the heating module comprises a medium frequency induction heating coil, and the heating temperature of the medium frequency induction heating coil ranges from 750 ℃ to 1000 ℃. Before the extrusion punch 1 extrudes the pipe wall of the pipeline 100 to be molded, the preformed hole 101 is heated by using a medium-frequency induction heating coil, so that the pipe wall of the pipeline 100 to be molded is extruded and molded.
Referring to fig. 4, the present embodiment further provides a method for forming a thick-walled pipe nozzle of a pipeline, which uses the forming apparatus for a thick-walled pipe nozzle of a pipeline, and specifically includes the following steps:
s1, forming a prefabricated hole 101 in a preset position of the pipeline 100 to be formed;
s2, heating the prefabricated hole 101 part of the pipeline 100 to be molded through a heating module;
s3, installing the extrusion punch 1 at the output end of the driving piece 3, and adjusting the position of the extrusion punch 1 to enable the guide boss 13 at the top of the extrusion punch to be opposite to the prefabricated hole 101;
s4, placing the outer die 2 above the pipeline 100 to be formed, and moving the outer die 2 downwards to be opposite to the prefabricated hole 101, and enabling the outer die 2 to be attached to the outer wall of the pipeline 100 to be formed;
s5, starting the driving member 3 to make the extrusion punch 1 gradually extend into the preformed hole 101 through the guiding boss 13 until the extrusion punch 1 extrudes on the pipe wall of the pipe 100 to be formed to form a nozzle.
In step S1, a preformed hole 101 is formed in the central portion of the nozzle of the pipe 100 to be formed, and the preformed hole 101 has an elliptical shape with its major axis along the axial direction of the pipe. In step S2, the preformed nozzle of the pipe 100 to be formed is heated by a medium frequency induction heating coil, and the heating temperature is controlled within the range of 750 ℃ to 1000 ℃.
In steps S3 and S4, the extrusion punch 1 is placed on the stage 31 of the hydraulic drive device so that the guide boss 13 on the top of the extrusion punch 1 is opposed to the prepared hole 101, ensuring that the guide boss 13 is aligned with the center of the prepared hole 101. The hydraulic drive is then fixed and the positioning posts 42 of the centering module 4 are inserted into the preformed holes 101. The outer die 2 is then positioned right above the pipe 100 to be formed, so that the positioning groove 21 is opposite to the positioning seat 41 of the centering module 4. And moving the outer die 2 downwards to enable the centering module 4 to sequentially pass through the positioning groove 21 and the positioning through hole 22 until the cambered surface 211 of the side wall of the positioning groove 21 is tightly attached to the outer wall of the pipeline 100 to be formed, and finally, taking down the centering module 4.
In step S5, after the driving member 3 is activated, the extrusion punch 1 is pushed to move upward, the extrusion punch 1 cooperates with the outer die 2, and the extrusion tube wall forms a nozzle with a required size.
Taking the hualong first-number main steam super pipeline as an example, the material of the super pipeline is P280GH, and 9 nozzles with 4 specifications are distributed on one super pipeline. Taking the nozzle 1 (phi 243 multiplied by phi 195) as an example, the method for forming the pipeline thick-wall nozzle provided by the embodiment is adopted to form the nozzle. According to a calculation formula of the prefabricated hole 101, the long axis length of the oval prefabricated hole 101 is 80mm, the short axis length of the oval prefabricated hole 101 is 60mm, the diameter of the second punch part 12 of the extrusion punch 1 is 195mm, the top end of the first punch part 11 is an approximately circular plane with the diameter of 80mm, and the side surface of the first punch part 11 is in a parabolic shape and transits from top to bottom. And heating the preformed pipe nozzle part of the main steam super pipeline by adopting a medium-frequency induction heating coil at the heating temperature of 980-1000 ℃.
Through actual measurement, the height of the nozzle of the Hualong I primary steam super pipeline nozzle 1 can reach more than 60mm, the wall thickness of the nozzle is uniform, the difference between the maximum thickness and the minimum thickness is within 1 percent, and the performance and the grain size grade of the nozzle both meet the requirements of technical conditions.
That is to say, the forming method of the pipeline thick-wall nozzle can form the nozzle meeting the requirements at one time, repeated heating and extrusion of the pipe wall are not needed, and abnormal grain size of the material caused by repeated heating is avoided, so that the quality of the product formed by the nozzle on the pipeline 100 to be formed can be ensured, the qualified rate of finished products is improved, and the production cost of the product is reduced. The special structural design of extrusion drift 1 for at the in-process of nozzle extrusion, can prevent that the nozzle from appearing that the wall thickness is inhomogeneous, the shaping is highly not enough and surface defect scheduling problem, guarantee the shaping quality of nozzle.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A forming device for a thick-wall nozzle of a pipeline is characterized by comprising:
the pipe forming device comprises an extrusion punch head (1), wherein a guide boss (13) is arranged at the top of the extrusion punch head (1), and a prefabricated hole (101) is formed in a pipe (100) to be formed;
the heating module is used for heating the prefabricated hole (101) of the pipeline (100) to be formed;
the outer die (2) can be attached to the outer wall of the pipeline (100) to be formed and is opposite to the prefabricated hole (101);
driving piece (3), its output with extrusion drift (1) is connected, driving piece (3) can drive extrusion drift (1) removes, so that extrusion drift (1) pass through direction boss (13) stretch into after the heating prefabricated hole (101) to the extrusion forms the mouth of pipe.
2. The forming device of the pipeline thick-wall nozzle as claimed in claim 1, wherein the extrusion punch (1) comprises a first punch part (11) and a second punch part (12) which are connected, the outer surface of the first punch part (11) is a semi-ellipsoid, and the guide boss (13) is arranged at one end of the first punch part (11) far away from the second punch part (12).
3. The forming device of the pipeline thick-wall nozzle as claimed in claim 2, wherein the cross-sectional area of the guide boss (13) and the cross-sectional area of the first punch part (11) are gradually reduced from bottom to top.
4. The forming device of the pipe thick-walled nozzle of claim 2, characterized in that the second punch part (12) is a cylinder, and the diameter of the second punch part (12) is equal to the inner diameter of the nozzle.
5. The forming device of the pipeline thick-wall nozzle as claimed in claim 1, wherein the prefabricated hole (101) is an elliptical hole, the long axis of the elliptical hole is along the axial direction of the pipeline (100) to be formed, and the top surface of the guide boss (13) is elliptical.
6. The forming device of the pipeline thick-wall nozzle as claimed in claim 1, further comprising a centering module (4), wherein the centering module (4) is used for calibrating the position of the outer die (2) so that the outer die (2) is aligned with the prefabricated hole (101).
7. The forming device of the pipeline thick-wall nozzle as claimed in claim 6, wherein the centering module (4) comprises a positioning seat (41) and a positioning column (42) arranged on the positioning seat (41), and the positioning column (42) can penetrate through the prefabricated hole (101).
8. The apparatus of claim 1, wherein the heating module comprises a medium frequency induction heating coil, and the medium frequency induction heating coil is heated at a temperature ranging from 750 ℃ to 1000 ℃.
9. The forming device of the pipeline thick-wall nozzle as claimed in claim 1, wherein a positioning groove (21) is arranged on the outer die (2), the inner side wall surface of the positioning groove (21) is an arc surface (211), and the arc surface (211) can be attached to the outer wall of the pipeline (100) to be formed.
10. A method for forming a thick-walled pipe nozzle for a pipeline, which uses the forming device of the thick-walled pipe nozzle for a pipeline as claimed in any one of claims 1 to 9, comprising the steps of:
s1, forming a prefabricated hole (101) in a preset position of the pipeline (100) to be formed;
s2, heating the prefabricated hole (101) part of the pipeline (100) to be molded through a heating module;
s3, mounting the extrusion punch (1) at the output end of the driving piece (3), and adjusting the position of the extrusion punch (1) to enable the guide boss (13) at the top of the extrusion punch to be opposite to the prefabricated hole (101);
s4, placing the outer die (2) above the pipeline (100) to be formed, opposite to the prefabricated hole (101), moving the outer die (2) downwards, and enabling the outer die (2) to be attached to the outer wall of the pipeline (100) to be formed;
s5, starting the driving piece (3) to enable the extrusion punch head (1) to gradually extend into the prefabricated hole (101) through the guide boss (13) until the extrusion punch head (1) extrudes on the pipe wall of the pipe (100) to be formed to form a pipe nozzle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210015426.9A CN114378235A (en) | 2022-01-07 | 2022-01-07 | Forming device and method for thick-wall pipe nozzle of pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210015426.9A CN114378235A (en) | 2022-01-07 | 2022-01-07 | Forming device and method for thick-wall pipe nozzle of pipeline |
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| CN101767172A (en) * | 2009-12-31 | 2010-07-07 | 武汉重工铸锻有限责任公司 | Hot extrusion molding method for pipe nozzle of main steam super pipeline |
| RU2012102130A (en) * | 2012-01-24 | 2013-07-27 | Борис Васильевич Маркин | METHOD FOR HOT STAMPING OF LARGE-SIZED THICK-WALLED OIL-GAS-HEAT-WATER PIPES OF STEEL TEES BY EXTRACTING THE BRANCHING FROM THE INSIDE OF THE PIPE BITTING OR CUTTING-OFF SHEET |
| CN108435891A (en) * | 2018-04-16 | 2018-08-24 | 长沙格力暖通制冷设备有限公司 | Pipe hole punch |
| CN111659751A (en) * | 2020-06-12 | 2020-09-15 | 江苏新恒基特种装备股份有限公司 | Method for processing extrusion branch pipe on bent pipe and punch head structure |
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| CN101767172A (en) * | 2009-12-31 | 2010-07-07 | 武汉重工铸锻有限责任公司 | Hot extrusion molding method for pipe nozzle of main steam super pipeline |
| RU2012102130A (en) * | 2012-01-24 | 2013-07-27 | Борис Васильевич Маркин | METHOD FOR HOT STAMPING OF LARGE-SIZED THICK-WALLED OIL-GAS-HEAT-WATER PIPES OF STEEL TEES BY EXTRACTING THE BRANCHING FROM THE INSIDE OF THE PIPE BITTING OR CUTTING-OFF SHEET |
| CN108435891A (en) * | 2018-04-16 | 2018-08-24 | 长沙格力暖通制冷设备有限公司 | Pipe hole punch |
| CN111659751A (en) * | 2020-06-12 | 2020-09-15 | 江苏新恒基特种装备股份有限公司 | Method for processing extrusion branch pipe on bent pipe and punch head structure |
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Application publication date: 20220422 |