CN213079758U - Hemispherical part drawing stamping die - Google Patents
Hemispherical part drawing stamping die Download PDFInfo
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- CN213079758U CN213079758U CN202021277361.8U CN202021277361U CN213079758U CN 213079758 U CN213079758 U CN 213079758U CN 202021277361 U CN202021277361 U CN 202021277361U CN 213079758 U CN213079758 U CN 213079758U
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Abstract
The utility model relates to a hemisphere spare part deep drawing stamping die, include: the lower die assembly comprises a lower female die, and the lower female die is provided with a female die cavity; the upper die assembly comprises a liftable upper male die, the lower part of the upper male die is a hemispherical ejection head and is used for entering a die cavity of the female die to be matched with the lower female die to be drawn and stamped to form a hemispherical part; the material returning rod extends into a die cavity of the female die and is used for pushing the formed hemispherical part out of the female die; the top surface of the material returning rod is provided with a spherical crown-shaped recess, and the spherical crown-shaped recess is provided with a spherical inner surface and is used for matching with the spherical top area of the hemispherical part in an inserting manner when the spherical part is ejected upwards. When the material returning rod is used for pushing a workpiece, the spherical inner surface of the spherical concave part at the end part of the material returning rod is coated on the outer spherical surface of the workpiece, at the moment, the contact area of the spherical inner surface and the spherical concave part is large, the bottom deformation is not easy to occur when upward pushing acting force is applied, and the existing problem that the spherical concave part is pushed out due to point contact can be effectively avoided.
Description
Technical Field
The utility model relates to a hemisphere spare part deep drawing stamping die.
Background
High pressure gas cylinders are key components of spacecraft propulsion and control systems and can be used to store a source of high pressure gas. As shown in figure 1, the body of the high-pressure gas cylinder is formed by welding two gas cylinder hemispheres 1 at a welding seam 2. The processing quality of the gas cylinder hemisphere 1 is an important influence parameter of the performance of the high-pressure gas cylinder, and the processing steps of the existing gas cylinder hemisphere are as follows: blanking, forging, heat treatment and machining and forming. The gas cylinder has larger diameter, thin wall and high precision requirement. When the machine is machined and formed, a gas cylinder semi-sphere blank needs to be clamped on a machine tool, and due to the fact that the diameter of the semi-sphere is large, clamping is inconvenient, deformation is easy to occur, and production efficiency is low.
The utility model discloses a stamping forming mould is disclosed in the chinese utility model patent of No. CN207288610U in the grant bulletin, including last mould subassembly and lower mould subassembly, but go up the mould subassembly and include the deep-drawing terrace die of oscilaltion, lower mould subassembly then includes fixed deep-drawing die, deep-drawing die and deep-drawing terrace die matched with mode punching press hemisphere spare part, the bottom of deep-drawing terrace die is hemispherical structure, back in the deep-drawing terrace die gets into the deep-drawing die down, and the blank that corresponds is shaping in the deep-drawing die, and the blank that is in deep-drawing terrace die lower part can wrap up on the hemisphere head of deep-drawing terrace die. When the stamping is finished, the drawing male die moves upwards, the part is remained in the drawing female die, and then the part is ejected by the ejector rod.
Actually, the ball drawing process is also currently used for processing on a die forging machine, namely, the process of pressing a material into a hemisphere from a plate by descending a male die. Compared with the traditional machining process, the process has the advantages of high material utilization rate and high production efficiency. But there are problems in the actual use: the existing ejector rod for returning materials is T-shaped on the whole, a vertical guide rod is arranged at the lower part of the ejector rod and connected with a corresponding transmission mechanism, a flat plate is fixedly arranged at the upper part of the ejector rod, and when the guide rod moves upwards, the flat plate ejects a part out of a female die. When the T-shaped ejector rod outwards ejects the gas cylinder hemisphere, a flat plate is in contact with the ball top, point contact is often formed, so that the pressure of the ball top is too high, and the gas cylinder hemisphere is easy to dent at the ball top due to the thin wall thickness of the gas cylinder hemisphere, so that subsequent machining of the gas cylinder hemisphere is influenced, and the quality is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hemisphere spare part deep drawing stamping die to solve among the prior art ejector pin top and lead to appearing sunken technical problem easily at the ball top when ejecting gas cylinder hemisphere for the flat board.
In order to achieve the above object, the utility model provides a hemisphere spare part deep drawing stamping die's technical scheme is: a drawing and stamping die for hemispherical parts comprises:
the lower die assembly comprises a lower female die, and the lower female die is provided with a female die cavity;
the upper die assembly comprises a liftable upper male die, the lower part of the upper male die is a hemispherical ejection head and is used for entering the die cavity of the female die to be matched with the lower female die to be drawn and stamped to form a hemispherical part;
the material returning rod extends into the die cavity of the female die and is used for pushing the formed hemispherical part out of the lower female die;
the top surface of the material returning rod is provided with a spherical crown-shaped recess, and the spherical crown-shaped recess is provided with a spherical inner surface and is used for matching with the spherical top area of the hemispherical part in an inserting mode when the spherical part is ejected upwards.
The beneficial effects are that: the utility model provides a pressing die utensil is at the during operation, the cope match-die descends, impress the blank in corresponding die cavity, the blank cladding is overhead at the hemisphere roof pressure, after reaching the part shape that needs, the cope match-die goes upward and returns, then the material returned pole goes upward, the sunken spherical internal surface of material returned pole tip spherical cap shape can the cladding on work piece ectosphere, at this moment, both area of contact are great, when applying the top push effort that goes upward, be difficult to appear the bottom and warp, can effectively avoid current because the point contact and ejecting sunken problem.
As a further improvement, the vertical section of the spherical cap-shaped recess has a circular arc bottom edge, and the corresponding central angle of the circular arc bottom edge is 60-120 degrees.
As a further improvement, the central angle corresponding to the circular arc bottom side is 90 °.
As a further improvement, the edge of the spherical cap shaped recess is located inside the edge of the top surface of the stripper rod.
The beneficial effects are that: the edge of the spherical crown-shaped recess is positioned on the inner side of the edge of the top surface of the material returning rod, so that the strength of the material returning rod can be ensured.
As a further improvement, the material returning rod is of a T-shaped structure and comprises a lower guide rod and an upper pushing head, the female die cavity is a cylindrical cavity, and the peripheral surface of the upper pushing head is cylindrical and is in clearance fit with the cavity wall of the female die cavity.
The beneficial effects are that: the upper ejection head of the material returning rod is cylindrical and is in clearance fit with the cavity wall of the die cavity of the female die, so that the material returning rod can be guided.
As a further improvement, the upper die assembly comprises an upper die fixing plate and an upper pressure plate which are fixedly assembled together, the upper die fixing plate is provided with a male die mounting hole, the upper portion of the male die mounting hole is provided with a stop step, the upper male die is inserted into the male die mounting hole, the top end of the upper male die is provided with a flange which is matched with the stop step in a stop manner, and the upper male die is fixedly assembled in the male die mounting hole by the upper pressure plate.
The beneficial effects are that: the upper male die is fixedly installed on the upper die fixing plate and the upper pressing plate, so that the structure is simple, and the replacement and maintenance are both convenient.
As a further improvement, the upper male die comprises a cylindrical main body, the top of the cylindrical main body is provided with the flange, and the bottom of the cylindrical main body is integrally provided with the hemispherical jacking head.
The beneficial effects are that: the upper male die adopts a cylindrical main body, is convenient to transition with the hemispherical top pressure head, and reduces the stress concentration of the upper male die.
As a further improvement, the lower die assembly comprises a lower die sleeve, the lower female die is inserted into the lower die sleeve in an inosculating manner, a bottom plate is arranged at the bottom of the lower die sleeve, the lower female die is fixedly connected with the bottom plate through a bolt connecting structure, and a central through hole is formed in the bottom plate for the material returning rod to pass through.
The beneficial effects are that: the lower female die is arranged on the lower die sleeve through the bolt connecting structure, and the installation is convenient.
As a further improvement, the lower cavity die is tightly fitted in the lower die sleeve.
The beneficial effects are that: the lower female die is assembled in the lower die sleeve in a tight fit mode, pre-assembly is achieved, and the bolt connecting structure is conveniently used for connection.
As a further improvement, a discharging groove is arranged at the opening part of the lower concave die corresponding to the die cavity of the female die.
The beneficial effects are that: and a discharging groove is arranged on the lower female die, so that blanks are conveniently placed.
Drawings
FIG. 1 is a schematic structural diagram of a conventional high-pressure gas cylinder;
fig. 2 is a schematic structural view of an embodiment 1 of the drawing and punching die for hemispherical parts according to the present invention;
fig. 3 is a schematic structural view of the material returning rod in fig. 2.
Description of reference numerals:
1-cylinder hemisphere, 2-weld, 3-upper press plate, 4-upper die fixing plate, 5-upper punch, 6-lower die, 7-lower die sleeve, 8-stripper rod, 81-lower guide rod, 82-upper ram, 83-annular region, 84-spherical crown depression, 9-bolt mounting hole, 10-die cavity, 11-hemispherical ram, 12-discharge chute, 13-arc main body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used 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; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from the specific situation.
The present invention will be described in further detail with reference to examples.
The utility model provides a hemisphere spare part deep drawing stamping die's embodiment 1:
as shown in fig. 2 and 3, the drawing and stamping die for hemispherical parts in this embodiment integrally includes an upper die assembly and a lower die assembly, the upper die assembly and the lower die assembly are correspondingly mounted on a corresponding die forging machine, an upper convex film in the upper die assembly is lifted up and down, and cooperates with a lower concave film in the lower die assembly to draw and stamp to form a gas cylinder hemisphere.
Specifically, the upper die assembly mainly comprises an upper die fixing plate 4, an upper pressing plate 3 and an upper male die 5, wherein the upper die fixing plate 4 is fixed on a workbench of a hydraulic die forging machine, and the upper die fixing plate is pressed by the die forging machine to move downwards to drive the upper die assembly to move downwards. The upper punch fixing plate 4 is provided with a punch mounting hole, the upper part of the punch mounting hole is provided with a stopping step, the upper punch 5 is inserted into the punch mounting hole, the top end of the upper punch 5 is provided with a flange to be matched with the stopping step in a stopping manner, then the upper punch 5 is pressed and fixed in the punch mounting hole by the upper pressing plate 3, and the upper punch fixing plate 4, the upper pressing plate 3 and the upper punch 5 are fixedly assembled together.
In fact, the upper punch 5 here comprises a cylindrical body 13, the top of the cylindrical body 13 being provided with the above-mentioned flange, and the bottom of the cylindrical body 13 being integrally provided with a hemispherical ram 11 for deep drawing-stamping the corresponding cylinder hemisphere.
The lower die assembly comprises a lower die sleeve 7 and a lower female die 6, the lower die sleeve 7 is correspondingly fixed on a lower panel of a workbench of the die forging machine, the lower die sleeve 7 comprises a bottom plate and a circumferential sleeve wall, the bottom plate and the circumferential sleeve wall enclose a groove, the lower female die 6 is correspondingly matched and inserted in the groove of the lower die sleeve 7, and the lower female die 6 is fixedly connected with the bottom plate through a bolt connecting structure. During specific assembly, actually, the screw bolt is placed in the lower die sleeve 7 by utilizing the principle of expansion with heat and contraction with cold, and four screw bolts are correspondingly arranged in a penetrating manner for tightening.
The lower concave die 6 is provided with a concave die cavity, the concave die cavity is a cylindrical die cavity for the upper convex die to enter, and the lower concave die and the upper convex die are matched with each other to draw and press the plate material to form the gas cylinder hemisphere.
And a discharging groove 12 is arranged at the die cavity opening of the lower die 6, and the discharging groove 12 is used for placing a blank for the stamping of the upper punch 5. Generally, the outside diameter of the discharging groove is larger than the blank by 0.05 mm, the depth is generally consistent with the thickness of the blank, and the discharged blank does not protrude out of the lower die.
In order to guarantee normal material returning, install material returning pole 8 on lower mould assembly, as shown in fig. 3, material returning pole 8 wholly is T shape structure, including lower guide bar 81 and last top pressure head 82, the center that is equipped with on the bottom plate that lower guide bar 81 runs through lower die sleeve downwards perforates, goes up top pressure head 82 and then is located the die cavity to, go up top pressure head 82 outer peripheral face and be cylindrical, with the cavity wall clearance fit of columniform die cavity, can form the direction to last top pressure head.
In order to better push the gas cylinder hemisphere to exit from the lower concave die, the surface of the upper jacking head 82 is provided with a spherical crown-shaped recess 84, and the spherical inner surface of the upper jacking head can be coated on the outer spherical surface of the spherical top area of the gas cylinder hemisphere when the gas cylinder hemisphere is pushed upwards, so that the contact area is increased, and the deformation of the bottom of a part is effectively reduced.
Considering that the wall of the hemisphere of the gas cylinder is thin, the area of the spherical crown shaped recess is controlled, because the spherical crown shaped recess is of a symmetrical structure, any vertical section of the spherical crown shaped recess forms a circular arc bottom edge, the circular angle corresponding to the circular arc bottom edge is 60-120 degrees, and when the spherical crown shaped recess is actually manufactured, the circular arc bottom edge is preferably 90 degrees.
In addition, to ensure the stripper bar strength, for the upper ram, the edge of the spherical crown shaped depression is located inside the edge of the upper ram to form an annular region 83 therebetween.
When the die forging machine is used, a blank is placed in the material discharge groove 12, the upper die assembly moves downwards, the upper male die 5 presses the blank into a female die cavity, the blank is coated on the hemispherical jacking head, after the required part shape is achieved, the upper male die 5 moves upwards to return, then the jacking rod of the die forging machine is used for pushing the material returning rod 8 to move upwards, the spherical inner surface of the spherical crown depression at the end part of the material returning rod 8 is coated on the outer spherical surface of a workpiece, the contact area is large, and bottom deformation is not easy to occur.
The drawing and stamping die provided by the embodiment can be used for stamping and processing the gas cylinder hemisphere, and in other embodiments, the drawing and stamping die can also be applied to other hemispherical parts needing drawing and stamping forming.
The utility model provides a hemispherical spare part deep drawing stamping die's embodiment 2:
the difference from example 1 is mainly that: in the embodiment 1, the central angle of the circular arc bottom side corresponding to the spherical crown shaped depression at the top of the stripper rod is 60 to 120 degrees, and in the embodiment, the central angle of the circular arc bottom side corresponding to the spherical crown shaped depression at the top of the stripper rod is 30 degrees.
The utility model provides a hemispherical spare part deep drawing stamping die's embodiment 3:
the difference from example 1 is mainly that: in embodiment 1, the edge of the spherical cap shaped recess is located inside the edge of the upper indenter to form an annular region therebetween, and in this embodiment, the edge of the spherical cap shaped recess extends to the outer circumferential surface of the upper indenter.
Finally, it should be noted that the above mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made without inventive effort to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features. 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 (10)
1. A drawing and stamping die for hemispherical parts comprises:
the lower die assembly comprises a lower female die, and the lower female die is provided with a female die cavity;
the upper die assembly comprises a liftable upper male die, the lower part of the upper male die is a hemispherical ejection head and is used for entering the die cavity of the female die to be matched with the lower female die to be drawn and stamped to form a hemispherical part;
the material returning rod extends into the die cavity of the female die and is used for pushing the formed hemispherical part out of the lower female die;
the method is characterized in that: the top surface of the material returning rod is provided with a spherical crown-shaped recess, and the spherical crown-shaped recess is provided with a spherical inner surface and is used for matching with the spherical top area of the hemispherical part in an inserting mode when the spherical part is ejected upwards.
2. The drawing and punching die for hemispherical parts as claimed in claim 1, wherein the vertical cross section of the spherical crown shaped depression has a circular arc shaped bottom side, and the circular arc shaped bottom side corresponds to a central angle of 60 ° to 120 °.
3. The drawing and punching die for hemispherical parts as claimed in claim 2, wherein the circular arc bottom edge corresponds to a central angle of 90 °.
4. The deep drawing die for hemispherical parts as claimed in claim 2, wherein the edge of the spherical crown shaped recess is located inside the edge of the top surface of the stripper rod.
5. The deep drawing die for the hemispherical parts as claimed in any one of claims 1 to 4, wherein the stripper bar is T-shaped and comprises a lower guide bar and an upper ejector head, the female die cavity is a cylindrical cavity, and the outer peripheral surface of the upper ejector head is cylindrical and is in clearance fit with the cavity wall of the female die cavity.
6. A deep drawing die for hemispherical parts as claimed in any one of claims 1 to 4, wherein the upper die assembly comprises an upper die fixing plate and an upper pressing plate which are fixedly assembled together, the upper die fixing plate is provided with a punch mounting hole, the upper part of the punch mounting hole is provided with a stopping step, the upper punch is inserted into the punch mounting hole, the top end of the upper punch is provided with a flange which is matched with the stopping step in a stopping way, and the upper pressing plate presses and fixes the upper punch in the punch mounting hole.
7. A deep drawing die for semispherical parts according to claim 6, wherein said upper punch comprises a cylindrical body, the top of the cylindrical body is provided with said flange, and the bottom of the cylindrical body is integrally provided with said semispherical heading head.
8. A deep drawing die for semispherical parts according to any one of claims 1 to 4, wherein the lower die assembly comprises a lower die sleeve, the lower female die is fittingly inserted into the lower die sleeve, a bottom plate is arranged at the bottom of the lower die sleeve, the lower female die is fixedly connected with the bottom plate through a bolt connection structure, and a central through hole is formed in the bottom plate for the material returning rod to pass through.
9. A deep drawing die for hemispherical parts as claimed in claim 8, wherein the lower female die is tightly fitted in the lower die sleeve.
10. A deep drawing die for semispherical parts according to any one of claims 1 to 4, wherein a discharge groove is provided at the lower female die corresponding to the mouth of the female die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021277361.8U CN213079758U (en) | 2020-07-03 | 2020-07-03 | Hemispherical part drawing stamping die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021277361.8U CN213079758U (en) | 2020-07-03 | 2020-07-03 | Hemispherical part drawing stamping die |
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| Publication Number | Publication Date |
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| CN213079758U true CN213079758U (en) | 2021-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021277361.8U Active CN213079758U (en) | 2020-07-03 | 2020-07-03 | Hemispherical part drawing stamping die |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700407A (en) * | 2022-04-12 | 2022-07-05 | 河南航天液压气动技术有限公司 | Forming method for drawing and extruding hemispherical parts |
-
2020
- 2020-07-03 CN CN202021277361.8U patent/CN213079758U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700407A (en) * | 2022-04-12 | 2022-07-05 | 河南航天液压气动技术有限公司 | Forming method for drawing and extruding hemispherical parts |
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