CN216175901U - Electromagnetic forming die for concave corrugation of thin-wall metal pipe fitting - Google Patents
Electromagnetic forming die for concave corrugation of thin-wall metal pipe fitting Download PDFInfo
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- CN216175901U CN216175901U CN202122722035.4U CN202122722035U CN216175901U CN 216175901 U CN216175901 U CN 216175901U CN 202122722035 U CN202122722035 U CN 202122722035U CN 216175901 U CN216175901 U CN 216175901U
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Abstract
The utility model discloses a die for electromagnetic forming of concave corrugations of a thin-wall metal pipe fitting, which comprises an upper outer sleeve, an upper punch, an upper pressure plate, a lower outer sleeve and a lower punch; the upper outer sleeve is sleeved outside the upper punch, the upper pressing plate is fixed at the top of the upper outer sleeve, and the upper outer sleeve is connected with the upper die frame; the lower outer sleeve is sleeved outside the lower punch, and the lower punch is fixed with the die carrier base; the pipe blank is arranged at the gap between the upper and lower jackets and the upper and lower punches, and liquid is filled between the upper and lower punches; an upper sealing component is arranged between the upper outer sleeve and the tube blank; and a lower sealing component is arranged between the lower outer sleeve and the tube blank. The die is simple in structure and convenient to process; the key forming part of the corrugated cavity is only provided with a female die without male die matching, so that the cost of the die is reduced, the adjustment and optimization of the corrugated shape are facilitated, the forming efficiency is high, the forming precision is high, the adaptability is strong, and the corrugated forming precision can reach +/-0.03 mm through actual forming tests.
Description
Technical Field
The utility model belongs to the field of a ripple forming die, and particularly relates to an electromagnetic forming die for concave ripples of a thin-wall metal pipe fitting.
Background
In order to complete some special functions, the corrugated expansion type is required to be carried out on a high-strength metal thin-wall cylinder (the wall thickness is less than 0.2 mm), the forming process is the comprehensive change of elastic deformation, plastic deformation and bending forming of materials, and the processing and forming difficulty is high. Especially, for a thin-wall cylinder with a wall thickness of less than 0.2mm, the corrugation with a large wave height/wave width ratio needs to be formed, the forming precision is high, the forming difficulty of the traditional method is high, the corrugation forming is carried out by adopting an electromagnetic forming mode at present, a set of concave corrugation forming die needs to be designed urgently in order to match the electromagnetic forming mode so as to meet the requirements that the material and the structure can bear high-speed impact, the required waveform forming is realized after the rebound effect is considered by the size of a cavity, and a good fit clearance exists between the die and a workpiece.
SUMMERY OF THE UTILITY MODEL
The utility model is provided for overcoming the defects in the prior art, and aims to provide a die for electromagnetic forming of concave corrugations of a thin-wall metal pipe fitting.
The utility model is realized by the following technical scheme:
a die for electromagnetic forming of concave corrugations of a thin-wall metal pipe fitting comprises an upper outer sleeve, an upper punch, an upper pressing plate, a lower outer sleeve and a lower punch; the upper outer sleeve is sleeved outside the upper punch, the lower end of the upper outer sleeve is inserted into the lower outer sleeve, the upper pressing plate is fixed at the top of the upper outer sleeve, and the upper outer sleeve is connected with the upper die frame; the lower outer sleeve is sleeved outside the lower punch, and the lower punch is fixed with the die carrier base; the pipe blank is arranged in the gap between the upper outer sleeve and the lower outer sleeve and between the upper outer sleeve and the pipe blank and between the lower outer sleeve and the pipe blank, an upper sealing assembly and a lower sealing assembly are respectively arranged; liquid is filled between the upper punch and the lower punch; an upper forming groove is formed in the bottom surface of the upper punch, a lower forming groove is formed in the top surface of the lower punch, and the upper forming groove and the lower forming groove are closed to form a corrugated cavity; and a liquid filling and discharging cavity channel and a pressure limiting valve cavity channel connected with the pressure limiting valve are formed on the lower outer sleeve.
In the technical scheme, the upper outer sleeve is a hollow stepped shaft structure consisting of a connecting part, a functional part and a guide part which are gradually reduced in diameter from top to bottom, a groove is formed on the inner wall of the upper part of the upper outer sleeve, and the upper sealing assembly is arranged in the groove; the outer wall of the guide part of the upper outer sleeve forms a groove, and the outer sealing ring is arranged in the groove.
In the technical scheme, an exhaust cavity channel is formed on the upper outer sleeve, an inlet of the exhaust cavity channel is arranged on the bottom surface of the guide part of the upper outer sleeve, an outlet of the exhaust cavity channel is arranged on the side wall of the functional part of the upper outer sleeve, and a sealing bolt is arranged at the outlet of the exhaust cavity channel.
In the technical scheme, the upper outer sleeve is in flexible connection with the upper die frame through the precision bearing.
In the technical scheme, the lower outer sleeve is of a hollow cylinder structure, the upper end and the lower end of the inner wall of the lower outer sleeve form an annular groove, and the guide part of the upper outer sleeve is inserted into the upper annular groove; the lower sealing assembly is arranged in the lower annular groove.
In the technical scheme, the bottom of the lower punch forms a convex edge, and the bottom of the lower outer sleeve and the convex edge are fixed through bolts.
In the above technical scheme, a plurality of spring holes for placing the springs are formed on the bottom surface of the upper punch and the top surface of the lower punch, and the two ends of the springs are respectively placed in the spring holes of the upper punch and the lower punch.
In the technical scheme, the centers of the upper punch and the lower punch are respectively provided with a central through hole for mounting the bolt, and after the upper punch and the lower punch are closed, the bolt locks the upper punch and the lower punch through the central through holes.
In the technical scheme, the upper sealing assembly comprises an upper sealing ring and an upper pressing ring arranged above the upper sealing ring, and the top surface of the upper pressing ring is in contact with the upper pressing plate; the lower sealing assembly comprises a lower sealing ring and a lower pressing ring arranged below the lower sealing ring; the bottom of the lower pressure ring is contacted with the top surface of the convex edge of the lower punch; in the installation process, the upper sealing ring and the lower sealing ring are in clearance fit with the tube blank.
In the above technical scheme, the bottoms of the upper forming groove and the lower forming groove are inclined planes, and the end parts are in arc transition.
The utility model has the beneficial effects that:
the utility model provides a die for electromagnetic forming of concave corrugations of a thin-wall metal pipe fitting, which is simple in structure and convenient to process; the corrugated cavity of the key forming part is only provided with a female die without the matching of a male die, so that the cost of the die is reduced, and the adjustment and optimization of the corrugated shape are facilitated; the electromagnetic impact molding high-pressure impact enables the thin-wall part to be quickly attached to the inner wall of the mold in the mold cavity of the mold, so that the corrugation is obtained, and the molding efficiency is high; 10-4The high-speed forming in the s can greatly improve the deformation capacity of the material, the deformation resilience is small, the dimensional precision of the corrugations is ensured by the precision of a female die, and the forming precision is high; the adaptability is strong, and the corrugations with various sizes and shapes can be obtained by adjusting the size and the shape of the die cavity; the actual forming test shows that the corrugation forming precision can reach +/-0.03 mm.
Drawings
FIG. 1 is a schematic structural diagram of a die for electromagnetic forming of concave corrugations of a thin-wall metal pipe fitting according to the present invention;
FIG. 2 is a schematic structural diagram of a corrugated cavity (in a closed state of an upper punch and a lower punch) in the electromagnetic forming die for concave corrugation of the thin-wall metal pipe fitting.
Wherein:
1 coat
11 exhaust cavity 12 sealing bolt
13 outer sealing ring 14 precision bearing
2 upper punch
21 upper forming groove
3 Upper press plate
4 lower coat
41 liquid charging and discharging cavity channel 42 pressure limiting valve cavity channel
5 lower punch
Lower 51 forming groove
6 upper press ring
7 upper sealing ring
8 lower sealing ring
9 pressing ring
10 tube blank
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the following description is made in conjunction with the accompanying drawings of the specification and by means of specific embodiments to further describe the technical solutions of the mold for electromagnetic forming of concave corrugations of thin-walled metal pipe fittings.
Example 1
In this embodiment, the wave height L of the U-shaped single-wave corrugated pipe fitting is set by using the die for electromagnetic forming of the concave corrugations of the thin-wall metal pipe fitting, which is disclosed by the utility model, as an example of the pipe blank 10 with the wall thickness of less than 0.2mmbWave width WbTotal length HGeneral assemblyInner diameter DInner partOuter diameter DOuter cover。
As shown in figure 1, the die for the electromagnetic forming of the concave corrugations of the thin-wall metal pipe comprises an upper outer sleeve 1, an upper punch 2, an upper pressing plate 3, a lower outer sleeve 4 and a lower punch 5.
The upper outer sleeve 1 is a hollow stepped shaft structure consisting of a connecting part, a functional part and a guide part which are gradually reduced from top to bottom, the upper outer sleeve 1 is flexibly connected with an upper die carrier (not shown) through a precision bearing 14, and the distance between the upper outer sleeve and the lower outer sleeve can be controlled according to requirements in the forming process; a groove is formed in the inner wall of the upper part of the upper outer sleeve 1, an upper sealing assembly is arranged in the groove and comprises an upper sealing ring 7 and an upper pressing ring 6 arranged above the upper sealing ring 7, and the top surface of the upper pressing ring 6 is in contact with the upper pressing plate 3;
in the embodiment, an exhaust cavity 11 is formed on the upper outer sleeve 1, an inlet of the exhaust cavity 11 is arranged on the bottom surface of the guide part of the upper outer sleeve 1, an outlet of the exhaust cavity 11 is arranged on the side wall of the functional part of the upper outer sleeve 1, and a sealing bolt 12 is arranged at the outlet; the exhaust cavity 11 is used for exhausting gas in the cavity, and the sealing bolt 12 is used for sealing after exhausting gas.
In the embodiment, in order to further improve the sealing effect and ensure the sealing between the upper outer sleeve and the lower outer sleeve, a groove is formed on the outer wall of the guide part of the upper outer sleeve 1, and the outer sealing ring 13 is arranged in the groove.
The upper punch 2 is of a cylindrical structure and is arranged in a middle cavity of the upper outer sleeve 1, and an upper forming groove 21 is formed in the edge of the bottom surface of the upper punch 2.
The upper pressure plate 3 is arranged at the top of the upper outer sleeve 1 and fixedly connected with the upper outer sleeve through bolts;
the lower outer sleeve 4 is of a hollow column structure, and a liquid filling and discharging cavity channel 41 and a pressure limiting valve cavity channel 42 connected with a pressure limiting valve are formed on the lower outer sleeve; and the upper and lower ends of the inner wall of the sleeve form annular grooves, and the guide part of the upper outer sleeve 1 is inserted into the upper annular groove to realize the coaxiality of the upper outer sleeve and the lower outer sleeve; the lower sealing assembly is arranged in the lower annular groove; the lower sealing assembly comprises a lower sealing ring 8 and a lower pressing ring 9 arranged below the lower sealing ring 8; the bottom of the lower press ring 9 is contacted with the top surface of the convex edge of the lower punch 5;
the lower punch 5 is of a cylindrical structure, a lower forming groove 51 corresponding to the upper forming groove 21 is formed in the top of the lower punch 5, a convex edge is formed at the bottom of the lower punch 5, and the lower punch 5 is fixed with the die carrier base; the lower outer sleeve 4 is sleeved outside the lower punch 5, and the bottom of the lower outer sleeve 4 and the convex edge are fixed through bolts;
the pipe blank 10 is arranged at the gap between the upper and lower jackets and the upper and lower punches, and liquid is filled between the upper and lower punches 2 and 5.
In this embodiment, a plurality of spring holes for placing the spring are uniformly formed on the bottom surface of the upper punch 2 and the top surface of the lower punch 5, two ends of the spring are respectively placed in the spring holes of the upper punch 2 and the lower punch 5, and the arrangement of the above structure enables the distance between the upper punch 2 and the lower punch 5 to automatically keep a certain distance.
In this embodiment, the centers of the upper punch 2 and the lower punch 5 are both provided with a central through hole for installing a bolt, and after the upper punch and the lower punch are assembled, the upper punch and the lower punch are locked by the bolt, so that the upper punch and the lower punch are in a locked state in an impact process, and the opening distance of the upper punch and the lower punch is not changed.
In this embodiment, the upper press plate 3 is centrally formed with a through hole for facilitating the installation of bolts for locking the upper and lower punches 2 and 5.
In this embodiment, the upper seal ring 7 of the upper seal assembly and the lower seal ring 8 of the lower seal assembly are in clearance fit with the tube blank 10 during installation, and after the tube blank 10 is installed, the upper and lower press rings press the corresponding upper and lower seal rings to extrude the upper and lower seal rings and the tube blank 10 to form a seal.
In the present embodiment, the bottom of the upper forming groove 21 and the bottom of the lower forming groove 51 are inclined planes, and the ends are in arc transition. During forming, the upper punch 2 and the lower punch 5 are closed, and the upper forming groove 21 and the lower forming groove 51 are closed to form a complete corrugated cavity; the dimension parameters of the corrugated cavity are as shown in fig. 2, and the parameters of the corrugated cavity are determined according to the dimension of the formed corrugation in a mode that the dimension of a waveform finished product is multiplied by (1 + deformation rebound proportion) = the dimension of the corrugated cavity.
The main parameters of the corrugated cavity meet the following conditions:
the depth L of the upper forming groove and the lower forming groove is = 1.05Lb ~1.15Lb；
Width of open end of corrugated cavity W = 0.85Wb ~0.95Wb；
Arc radius R of closed end of corrugated cavity1=0.50 Wb ~0.55Wb；
Transition arc R at open end of corrugated cavity2=0.2 mm ~1.0 mm；
The included angle alpha of the bottom plane sections of the upper forming groove and the lower forming groove ranges from 3 degrees to 6 degrees.
In the present embodiment, the cavity size parameters of the upper outer sleeve 1 and the lower outer sleeve 4 are as shown in fig. 1: the inner diameters of the upper outer sleeve 1 and the lower outer sleeve 4 are the same, and the inner diameter DIn T=DOuter cover0.10-0.20 mm; the height H of the guide part of the upper outer sleeve 1d1The depth H of the upper annular groove of the lower outer sleeved2Satisfies the following relation: hd2= Hd1+10mm, and Hd1≥50mm。
The height of the upper outer sleeve 1 and the height H from the groove bottom of the lower outer sleeve 4 to the bottom surface of the lower outer sleeve 4tIdentity, Ht=0.5HGeneral assembly-0.1mm；
The inner diameters of the upper and lower outer sleeves are the same and are DIn T，DIn T=DOuter cover+（0.08~0.16）mm；
The groove depth H of the lower outer sleeve 4d1≥50mm, height H of guide part (11) of upper outer sleeve (1)d2= Hd1+10mm。
In this embodiment, the critical dimension parameters and the structural characteristics of the upper and lower punches are as shown in fig. 1: the upper punch and the lower punch have the same height, the same outer diameter and the height of 0.5HGeneral assemblyOuter diameter DC outer layer=DInner part-（0.08~0.16）mm。
In the embodiment, the inner cavities of the upper outer sleeve and the lower outer sleeve and the inner walls of the corrugated cavities are polished by fluid, the surface roughness reaches more than Ra0.1, and the friction damage to the workpiece in the forming process is reduced by coating lubricating oil before forming.
In the embodiment, the upper outer sleeve 1, the upper punch 2, the lower outer sleeve 4, the lower punch 5 and the upper press plate 3 are made of GCr15 alloy steel, the hardness of the alloy steel after heat treatment is 60-65 HRC, and the alloy steel has good impact resistance and deformation resistance.
The working process of the utility model is as follows:
installing a sealing ring 7 in a groove of an inner cavity of an upper outer sleeve 1, installing a pressure ring 6 on the sealing ring, then connecting an upper pressure plate 3 with the upper outer sleeve 1 through bolts to form an upper outer sleeve assembly, and flexibly connecting the upper outer sleeve assembly with an upper die carrier (not shown) through a precision bearing 14;
(ii) a lower sealing ring 8 is arranged in the inner cavity of the lower annular groove of the lower outer sleeve 4, a lower pressing ring 9 is arranged below the lower sealing ring, the lower punch 5 and the lower outer sleeve 4 are connected through the bolt hole without being locked, and the lower sealing ring is fixed on a die carrier base (not shown);
(iii) placing a suitable spring in the spring holes on the bottom surface of the upper punch 2 and the top surface of the lower punch 5, connecting the upper punch 2 and the lower punch 5 through a central through hole by using a bolt, and adjusting the vertical distance from the bottom surface of the upper punch 2 to the top surface of the lower punch 5 to be S;
(iv) inserting the tube blank 10 into the gap between the lower punch 5 and the lower outer sleeve 4, enabling the end face of the tube blank 10 to be tightly attached to the top face of the protruding edge of the lower punch 5, and locking bolts connected with the lower punch 5 and the lower outer sleeve 4 to ensure that the lower pressing ring presses the corresponding lower sealing ring to form good sealing;
and (v) controlling the upper outer sleeve 1 to move downwards to a certain position through the upper die frame, wherein the upper outer sleeve and the lower outer sleeve are kept coaxial through a guide part of the upper outer sleeve 1 in the downward moving process.
(vi) injecting antirust liquid into the mold through the liquid charging and discharging cavity channel 41, keeping an outlet of the exhaust cavity channel 11 open in the process, exhausting gas in the cavity, closing the outlet by using the sealing bolt 12 when liquid flows out from the outlet of the exhaust cavity channel 11, and enabling the pressure of the liquid in the mold to be P0。
(vii) the host voltage rises to V1After the discharge impact, the ripple part forms an initial wave, the pressure limiting valve cavity 42 is opened, then the upper die carrier is controlled to enable the upper outer sleeve 1 to press the upper punch 2 to move downwards, and the liquid pressure in the die is kept to be P all the time1And closing the upper punch and the lower punch.
(viii) the voltage of the host computer rises to V2, the pressure limiting valve cavity channel 42 is closed, discharge impact is carried out, the ripple forming is carried out after the impact is finished, the antirust liquid is sucked out through the liquid filling and discharging cavity channel, the upper outer sleeve component is lifted, and the workpiece is taken out.
The utility model provides a die for electromagnetic impact forming of concave corrugations of a high-strength thin-wall metal pipe fitting; the mold has simple structure and is convenient to process; the corrugated cavity of the key forming part is only provided with a female die without the matching of a male die, so that the cost of the die is reduced, and the adjustment and optimization of the corrugated shape are facilitated; the electromagnetic impact molding high-pressure impact enables the thin-wall part to be quickly attached to the inner wall of the mold in the mold cavity of the mold, so that the corrugation is obtained, and the molding efficiency is high; 10-4The high-speed forming in the s can greatly improve the deformation capacity of the material, the deformation resilience is small, the dimensional precision of the corrugations is ensured by the precision of a female die, and the forming precision is high; the adaptability is strong, and the corrugations with various sizes and shapes can be obtained by adjusting the size and the shape of the die cavity; the actual forming test shows that the corrugation forming precision can reach +/-0.03 mm.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The utility model provides a mould is used in electromagnetic forming of thin wall metal pipe spare indent ripple which characterized in that: comprises an upper outer sleeve (1), an upper punch (2), an upper pressure plate (3), a lower outer sleeve (4) and a lower punch (5);
the upper outer sleeve (1) is sleeved outside the upper punch (2), the lower end of the upper outer sleeve is inserted into the lower outer sleeve (4), the upper pressing plate (3) is fixed at the top of the upper outer sleeve (1), and the upper outer sleeve (1) is connected with the upper die frame; the lower outer sleeve (4) is sleeved outside the lower punch (5), and the lower punch (5) is fixed with the die carrier base; the tube blank (10) is arranged at the gap between the upper and lower jackets and the upper and lower punches, and an upper sealing assembly and a lower sealing assembly are respectively arranged between the upper jacket (1) and the lower jacket (4) and the tube blank (10); liquid is filled between the upper punch (2) and the lower punch (5); an upper forming groove (21) is formed in the bottom surface of the upper punch (2), a lower forming groove (51) is formed in the top surface of the lower punch (5), and the upper forming groove (21) and the lower forming groove (51) are closed to form a corrugated cavity; and a liquid filling and discharging cavity (41) and a pressure limiting valve cavity (42) connected with the pressure limiting valve are formed on the lower outer sleeve (4).
2. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 1, wherein: the upper outer sleeve (1) is of a hollow stepped shaft structure consisting of a connecting part, a functional part and a guide part which are gradually reduced in diameter from top to bottom, a groove is formed on the inner wall of the upper part of the upper outer sleeve, and an upper sealing assembly is arranged in the groove; a groove is formed in the outer wall of the guide part of the upper outer sleeve (1), and the outer sealing ring (13) is arranged in the groove.
3. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 2, wherein: go up and form exhaust chamber way (11) on overcoat (1), exhaust chamber way (11) import sets up in the guide part bottom surface of last overcoat (1), and the export sets up in the lateral wall of the function portion of last overcoat (1), and the exit sets up sealing bolt (12).
4. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 1, wherein: the upper outer sleeve (1) is in flexible connection with the upper die frame through a precision bearing (14).
5. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 1, wherein: the lower outer sleeve (4) is of a hollow cylinder structure, the upper end and the lower end of the inner wall of the lower outer sleeve form annular grooves, and the guide part of the upper outer sleeve (1) is inserted into the upper annular grooves; the lower sealing assembly is arranged in the lower annular groove.
6. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 1, wherein: and a convex edge is formed at the bottom of the lower punch (5), and the bottom of the lower outer sleeve (4) and the convex edge are fixed through bolts.
7. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 1, wherein: a plurality of spring holes which are correspondingly arranged and used for placing springs are formed in the bottom surface of the upper punch (2) and the top surface of the lower punch (5), and two ends of each spring are respectively placed in the spring holes of the upper punch (2) and the lower punch (5).
8. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 1, wherein: the center of the upper punch (2) and the center of the lower punch (5) form a center through hole for installing a bolt, and after the upper punch (2) and the lower punch (5) are assembled, the bolt locks the upper punch (2) and the lower punch (5) through the center through hole.
9. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 1, wherein: the upper sealing assembly comprises an upper sealing ring (7) and an upper pressing ring (6) arranged above the upper sealing ring (7), and the top surface of the upper pressing ring (6) is in contact with the upper pressing plate (3); the lower sealing assembly comprises a lower sealing ring (8) and a lower pressing ring (9) arranged below the lower sealing ring (8); the bottom of the lower pressure ring (9) is contacted with the top surface of the convex edge of the lower punch (5); in the installation process, the upper sealing ring (7) and the lower sealing ring (8) are in clearance fit with the tube blank (10).
10. The die for electromagnetic forming of the concave corrugations of the thin-walled metal pipe fitting according to claim 1, wherein: the bottoms of the upper forming groove (21) and the lower forming groove (51) are inclined planes, and the end parts of the inclined planes are in arc transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122722035.4U CN216175901U (en) | 2021-11-09 | 2021-11-09 | Electromagnetic forming die for concave corrugation of thin-wall metal pipe fitting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122722035.4U CN216175901U (en) | 2021-11-09 | 2021-11-09 | Electromagnetic forming die for concave corrugation of thin-wall metal pipe fitting |
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|---|---|
| CN216175901U true CN216175901U (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122722035.4U Active CN216175901U (en) | 2021-11-09 | 2021-11-09 | Electromagnetic forming die for concave corrugation of thin-wall metal pipe fitting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117773304A (en) * | 2024-02-27 | 2024-03-29 | 太原理工大学 | Device and method for prefabricating corrugated electromagnetic forming composite board |
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2021
- 2021-11-09 CN CN202122722035.4U patent/CN216175901U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117773304A (en) * | 2024-02-27 | 2024-03-29 | 太原理工大学 | Device and method for prefabricating corrugated electromagnetic forming composite board |
| CN117773304B (en) * | 2024-02-27 | 2024-05-14 | 太原理工大学 | Device and method for prefabricating corrugated electromagnetic forming composite board |
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