CN110586831A - Die assembly for forging oblique connecting pipe and forging method - Google Patents
Die assembly for forging oblique connecting pipe and forging method Download PDFInfo
- Publication number
- CN110586831A CN110586831A CN201910841459.7A CN201910841459A CN110586831A CN 110586831 A CN110586831 A CN 110586831A CN 201910841459 A CN201910841459 A CN 201910841459A CN 110586831 A CN110586831 A CN 110586831A
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- Prior art keywords
- hole
- blank
- die
- forging
- pressing plate
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- 238000005242 forging Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000003825 pressing Methods 0.000 claims abstract description 40
- 238000005520 cutting process Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- 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
Abstract
The invention discloses a die assembly for forging a diagonal connection pipe and provides a method for forging the diagonal connection pipe based on the die assembly. The die assembly comprises a first die assembly and a second die assembly, the first die assembly is mainly used for upsetting the upper part of the cylindrical blank and inclining the upper part of the cylindrical blank to one side, the lower part of the cylindrical blank is formed into a pipe part of the inclined connecting pipe, so that the upset and inclined part can be placed into the second die assembly together with the pipe part, and then the inclined connecting pipe is formed in the second die assembly through pressing. Compared with the prior art, the invention has the following technical effects: 1. by means of the die assembly, profiling forging is carried out, and an angle of 45 degrees is forged, so that the operation is simple and convenient; 2. the smooth completion of the metal streamline can be ensured; 3. effectively reducing the forging sectional area, ensuring that the forging is fully forged, and further shortening the heat treatment and heat preservation time after forging. 4. The turning allowance is reduced, and the processing period is shortened.
Description
Technical Field
The invention relates to the technical field of oblique connecting pipe forging, in particular to a die assembly for oblique connecting pipe forging and a forging method.
Background
The inclined connecting pipe can well change the flow direction of the fluid, adjust the mixing and energy exchange among the fluids, obtain ideal damping, and further influence the fluid mechanical property of the system and the integral thrust of the system. The traditional manufacturing process of the oblique connecting pipe is mainly free forging, and the specific implementation modes comprise the following three steps: 1. after the blank is drawn out, upsetting the blank into a step shaft, and then punching and cutting the step shaft; 2. after the blank is drawn out, upsetting the blank into an eccentric shaft, and then punching and cutting the eccentric shaft; 3. and performing combined forging on the two parts, namely drawing the blank, upsetting the blank into a step shaft, punching, sawing a 45-degree inclined plane, and then cutting. The above method has the following defects: the machining allowance is large, the forging sectional area is large, the full forging is not facilitated, and the machining period is long.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a die assembly for forging a tapered pipe and a forging method of the tapered pipe.
The technical scheme adopted by the invention is as follows: a die assembly for the forging of a mitre pipe, comprising:
a first assembly including a first forming die and a first upper platen; the top of the first forming die is provided with an inclined plane, the inclined plane is formed by cutting a plane forming an included angle of 45 degrees with the horizontal plane, and a vertical hole for forming a pipe part of the inclined connection pipe is formed in the inclined plane at the top of the first forming die; the first upper pressing plate is used for extruding a blank from the upper part;
the second assembly comprises a second forming module and a second upper pressing plate which are detachable; the top end face of the second forming module is a horizontal plane and is provided with a hole, the shape and the size of the hole are matched with those of a preformed oblique connecting pipe, and the part of the hole, which is matched with the oblique surface of the oblique connecting pipe, is positioned above the hole and is in the vertical direction; the second upper pressing plate is used for extruding the blank from the upper part, the bottom of the second pressing plate is a horizontal plane, and the peripheral size of the second pressing plate is larger than or equal to the diameter of the top of the hole.
Further, a notch is formed in the bottom of the first upper pressing plate, the inner side wall of one side of the notch is a slope, and an included angle alpha between the slope and the top wall of the notch is an obtuse angle; before the first upper pressing plate begins to extrude the blank, the top of the blank is positioned in the notch, and the blank close to the highest point of the through hole is abutted to the slope surface. The notches are combined with the slope, a certain guiding effect is achieved on cylindrical blanks during pressing, the tops of the blanks are affected by the slope when the blanks are pressed, and the tops of the blanks are pressed to be thickened and are deviated towards the lowest end of the vertical hole of the first forming die.
Further, the second molding module comprises a first movable mold, a second movable mold and a fixed mold which are sequentially arranged from top to bottom; a through hole in the vertical direction is formed in the first movable die, a through inclined hole with the axis forming an angle of 45 degrees with the horizontal direction is formed in the second movable die, a concave hole is formed in the top of the third movable die, and the through hole in the first movable die, the inclined hole in the second movable die and the concave hole in the fixed die jointly form the through hole; and the first movable die is taken down, and then the second movable die is horizontally pushed rightwards, so that the formed inclined connecting pipe can be ejected out.
A method of forging a die assembly for forging a mitre pipe as described above, comprising the steps of:
step 1: firstly, upsetting and drawing a blank, forging the blank into a cylindrical blank matched with the diameter of the vertical hole, and then cutting off the top and bottom excess materials for later use;
step 2: inserting the cylindrical blank with the excess materials cut off in the step 1 into the vertical hole, then buckling a notch at the bottom of the first upper pressing plate at the top of the cylindrical blank, and enabling the blank at the top of the cylindrical blank, which is close to the highest point of the through hole, to be abutted against the slope;
and step 3: pressing the first upper pressing plate downwards to ensure that the blank does not cross the hole transversely when the pressed blank is loaded into the hole formed in the top of the second forming die;
and 4, step 4: putting the blank pressed in the step 3 into the hole, and then pressing the second pressing plate downwards until the bottom of the second pressing plate is contacted with the top of the second forming die; and then taking out the blank and machining a hole to obtain the oblique connecting pipe.
Compared with the prior art, the invention has the following technical effects: 1. by means of the die assembly, profiling forging is carried out, and an angle of 45 degrees is forged, so that the operation is simple and convenient; 2. the smooth completion of the metal streamline can be ensured; 3. effectively reducing the forging sectional area, ensuring that the forging is fully forged, and further shortening the heat treatment and heat preservation time after forging. 4. The turning allowance is reduced, and the processing period is shortened.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of a squib.
Fig. 2 is a schematic structural view (bottom view) of the first upper platen in the embodiment of the present invention.
Fig. 3 is a sectional view taken along a-a in fig. 2.
Fig. 4 is a schematic structural view (top view) of a first molding die in an embodiment of the present invention.
FIG. 5 is a sectional view taken along the line B-B in FIG. 4
Fig. 6 is a schematic structural diagram of a first molding module according to an embodiment of the invention.
Fig. 7 is a schematic view of press forming of a squib in an embodiment of the present invention.
In the figure: the blank forming die comprises a pipe portion 1-1, an inclined surface portion 1-2, a first forming die 2-1, a first upper pressing plate 2-2-1, a notch 2-2-2, a slope 2-3, a vertical hole 3-1-1, a first movable die 3-1-2, a second movable die 3-1-3, a fixed die 3-2, a second upper pressing plate 3-3, and a blank 4.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention, and directions and references (e.g., upper, lower, left, right, etc.) may be used only to help the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Referring to fig. 1 to 6, a die assembly for mitre pipe forging includes a first assembly and a second assembly, wherein the first assembly includes a first forming die 2-1 and a first upper platen 2-2. The top of the first forming die 2-1 is provided with an inclined plane, the inclined plane is formed by cutting a plane forming an included angle of 45 degrees with the horizontal plane, and the inclined plane at the top of the first forming die is provided with a vertical hole 2-3 for forming the inclined connecting pipe part 1-1. The first upper press plate 2-2 is used to press the billet 4 from above.
The bottom of the first upper pressing plate 2-2 is provided with a notch 2-2-1, the inner side wall of one side of the notch is a slope 2-2-2, and an included angle alpha between the slope 2-2-2 and the top wall of the notch is an obtuse angle. Before the first upper pressing plate 2-2 begins to extrude the blank 4, the top of the blank is positioned in the gap, and the blank close to the highest point of the through hole is abutted against the slope surface 2-2-2. The slope and the top wall of the notch are further in arc transition.
The second assembly comprises a second removable molding die set and a second upper platen 3-2. The top end face of the second forming module is a horizontal plane and is provided with a hole 3-3, the shape and the size of the hole 3-3 are both adapted to the preformed oblique connection pipe 1, and the part of the hole 3-3 adapted to the oblique part 1-2 of the oblique connection pipe is positioned above and in the vertical direction; the second upper pressing plate 3-2 is used for extruding blanks from the upper part, the bottom of the second pressing plate 3-2 is a horizontal plane, and the peripheral size of the second pressing plate is larger than or equal to the diameter of the top of the hole.
The second forming module comprises a first movable mould 3-1-1, a second movable mould 3-1-2 and a fixed mould 3-1-3 which are sequentially arranged from top to bottom; a through hole in the vertical direction is formed in the first movable die 3-1-1, a through inclined hole with the axis forming an angle of 45 degrees with the horizontal direction is formed in the second movable die 3-1-2, a concave hole is formed in the top of the third movable die 3-1-3, and the through hole in the first movable die, the inclined hole in the second movable die and the concave hole in the fixed die form the hole 3-3 together; the first movable die 3-1-1 is taken down, and then the second movable die 3-1-2 is horizontally pushed rightwards, so that the formed inclined connecting pipe can be ejected out. If the inclined plane part and the pipe part of the inclined connecting pipe are in arc transition, an arc chamfer can be further arranged at the edge of the top of the vertical hole 2-3 arranged in the first forming die 2-1, and an arc transition is arranged at the top of the through inclined hole and used for forming a transition arc of the inclined plane part and the pipe part of the inclined connecting pipe.
The method for forging the inclined connecting pipe by adopting the die assembly for forging the inclined connecting pipe comprises the following steps:
step 1: firstly, upsetting and drawing a blank, forging the blank into a cylindrical blank 4 matched with the diameter of the vertical hole, and then cutting off the top and bottom excess materials for later use;
step 2: inserting the cylindrical blank 4 with the excess materials cut off in the step 1 into the vertical hole, then buckling a notch at the bottom of the first upper pressing plate at the top of the cylindrical blank, and enabling the blank at the top of the cylindrical blank, which is close to the highest point of the through hole, to be abutted against the slope;
and step 3: as shown in fig. 7 (a), an arrow indicates the direction of the force applied to the first upper platen. Pressing the first upper pressing plate 2-2 downwards to ensure that the blank 4 does not cross the hole transversely when the pressed blank is loaded into the hole formed in the top of the second forming die;
and 4, step 4: as shown in fig. 7 (b), an arrow indicates the direction of the force applied to the second upper platen. Putting the blank pressed in the step 3 into the hole, and then pressing the second pressing plate downwards until the bottom of the second pressing plate is contacted with the top of the second forming die; and then taking out the blank and machining a hole to obtain the oblique connecting pipe.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.
Claims (4)
1. The utility model provides a die assembly for the forging of scarf, which is characterized in that: the method comprises the following steps:
a first assembly comprising a first forming die (2-1) and a first upper platen (2-2); the top of the first forming die (2-1) is provided with an inclined plane, the inclined plane is formed by cutting a plane forming an included angle of 45 degrees with the horizontal plane, and a vertical hole (2-3) used for forming the inclined connecting pipe part (1-1) is formed in the inclined plane at the top of the first forming die; the first upper pressing plate (2-2) is used for extruding a blank (4) from the upper part;
a second assembly comprising a second removable forming die set and a second upper platen (3-2); the end face of the top of the second forming die set is a horizontal plane and is provided with a hole (3-3), the shape and the size of the hole (3-3) are matched with those of a preformed oblique connecting pipe (1), and the part of the hole (3-3) matched with the oblique part (1-2) of the oblique connecting pipe is positioned above and in the vertical direction; the second upper pressing plate (3-2) is used for extruding the blank from the upper part, the bottom of the second pressing plate (3-2) is a horizontal plane, and the peripheral size of the second pressing plate is larger than or equal to the diameter of the top of the hole.
2. The die assembly for the forging of a mitre pipe according to claim 1, wherein: a notch (2-2-1) is formed in the bottom of the first upper pressing plate (2-2), the inner side wall of one side of the notch is a slope surface (2-2-2), and an included angle alpha between the slope surface (2-2-2) and the top wall of the notch is an obtuse angle; before the first upper pressing plate (2-2) begins to extrude the blank (4), the top of the blank is positioned in the gap, and the blank close to the highest point of the through hole is abutted against the slope surface (2-2-2).
3. The die assembly for the forging of a mitre pipe according to claim 1, wherein: the second forming module comprises a first moving die (3-1-1), a second moving die (3-1-2) and a fixed die (3-1-3) which are sequentially arranged from top to bottom; a through hole in the vertical direction is formed in the first movable die (3-1-1), a through inclined hole with the axis forming an angle of 45 degrees with the horizontal direction is formed in the second movable die (3-1-2), a concave hole is formed in the top of the third movable die (3-1-3), and the through hole in the first movable die, the inclined hole in the second movable die and the concave hole in the fixed die form the hole (3-3) together in a surrounding manner; the first movable die (3-1-1) is taken down, and then when the second movable die (3-1-2) is horizontally pushed rightwards, the formed inclined connecting pipe can be ejected out.
4. A method for forging a beveled connecting pipe is characterized by comprising the following steps: the method using the die assembly for the die forging of a mitre pipe according to any one of claims 1 to 3, comprising the steps of:
step 1: firstly, upsetting and drawing a blank, forging the blank into a cylindrical blank (4) matched with the diameter of the vertical hole, and then cutting off the top and bottom excess materials for later use;
step 2: inserting the cylindrical blank (4) with the excess materials cut off in the step (1) into the vertical hole, then buckling a notch at the bottom of the first upper pressing plate at the top of the cylindrical blank, and enabling the blank at the top of the cylindrical blank, which is close to the highest point of the through hole, to be abutted against the slope;
and step 3: pressing the first upper pressing plate (2-2) downwards to enable the blank (4) not to cross the hole when the pressed blank is loaded into the hole formed in the top of the second forming die;
and 4, step 4: putting the blank pressed in the step 3 into the hole, and then pressing the second pressing plate downwards until the bottom of the second pressing plate is contacted with the top of the second forming die; and then taking out the blank, and machining a hole to obtain the oblique connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841459.7A CN110586831A (en) | 2019-09-06 | 2019-09-06 | Die assembly for forging oblique connecting pipe and forging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841459.7A CN110586831A (en) | 2019-09-06 | 2019-09-06 | Die assembly for forging oblique connecting pipe and forging method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110586831A true CN110586831A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910841459.7A Pending CN110586831A (en) | 2019-09-06 | 2019-09-06 | Die assembly for forging oblique connecting pipe and forging method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112589028A (en) * | 2020-11-30 | 2021-04-02 | 贵州航天新力科技有限公司 | Eccentric forging forming die structure |
| CN112605325A (en) * | 2020-11-30 | 2021-04-06 | 贵州航天新力科技有限公司 | Eccentric forging forming process |
| CN114192710A (en) * | 2021-12-01 | 2022-03-18 | 贵州航天新力科技有限公司 | Special-shaped lifting lug shape following forming device |
| CN114986099A (en) * | 2022-06-13 | 2022-09-02 | 江苏翔淳科技有限公司 | Machining and manufacturing method of inclined branch pipe table |
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| WO2013137256A1 (en) * | 2012-03-12 | 2013-09-19 | Ntn株式会社 | Method for producing outer joint member for constant-velocity universal joint, and outer joint member |
| CN103831389A (en) * | 2013-12-31 | 2014-06-04 | 宁波威瑞泰默赛多相流仪器设备有限公司 | Method for manufacturing special beveling tee-joint forge piece for GLCC separator |
| CN104139145A (en) * | 2014-08-11 | 2014-11-12 | 贵州航天新力铸锻有限责任公司 | Method for forging guide horn mouth forge pieces applied to internal components of nuclear reactor |
| CN104139143A (en) * | 2014-08-11 | 2014-11-12 | 贵州航天新力铸锻有限责任公司 | Method for forging forge piece with ellipsoidal shell |
| CN108160908A (en) * | 2016-12-07 | 2018-06-15 | 阜新华通管道有限公司 | Loose tool forging elbow forging method |
| CN109822027A (en) * | 2019-02-28 | 2019-05-31 | 二重（德阳）重型装备有限公司 | The forging and molding mold and forging method of the integrated end socket of nuclear power |
| CN210754919U (en) * | 2019-09-06 | 2020-06-16 | 江苏圣贤锻造有限责任公司 | Die assembly for forging oblique connecting pipe |
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| WO2013137256A1 (en) * | 2012-03-12 | 2013-09-19 | Ntn株式会社 | Method for producing outer joint member for constant-velocity universal joint, and outer joint member |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112589028A (en) * | 2020-11-30 | 2021-04-02 | 贵州航天新力科技有限公司 | Eccentric forging forming die structure |
| CN112605325A (en) * | 2020-11-30 | 2021-04-06 | 贵州航天新力科技有限公司 | Eccentric forging forming process |
| CN112589028B (en) * | 2020-11-30 | 2023-02-28 | 贵州航天新力科技有限公司 | Eccentric forging forming die structure |
| CN112605325B (en) * | 2020-11-30 | 2023-02-28 | 贵州航天新力科技有限公司 | Eccentric forging forming process |
| CN114192710A (en) * | 2021-12-01 | 2022-03-18 | 贵州航天新力科技有限公司 | Special-shaped lifting lug shape following forming device |
| CN114192710B (en) * | 2021-12-01 | 2024-04-09 | 贵州航天新力科技有限公司 | Irregular lifting lug forming device |
| CN114986099A (en) * | 2022-06-13 | 2022-09-02 | 江苏翔淳科技有限公司 | Machining and manufacturing method of inclined branch pipe table |
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