CN112719087B - Forming method for upper outlet of nuclear power hanging basket barrel - Google Patents
Forming method for upper outlet of nuclear power hanging basket barrel Download PDFInfo
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- CN112719087B CN112719087B CN202011624414.3A CN202011624414A CN112719087B CN 112719087 B CN112719087 B CN 112719087B CN 202011624414 A CN202011624414 A CN 202011624414A CN 112719087 B CN112719087 B CN 112719087B
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- die
- lower die
- arc plate
- pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention discloses a method for forming an upper outlet of a nuclear power hanging basket barrel, which adopts a forming tool and an arc plate workpiece, wherein the forming tool comprises the following steps: the device comprises an upper die, a trimming die and a lower die, wherein the upper die comprises a conical section die head and a cylindrical section die head; the molding step comprises: 1. installing an upper die, a blank pressing die and a lower die on an oil press, heating the arc plate workpiece, hoisting and fixing the arc plate workpiece on the lower die, pressing the blank pressing die on the arc plate workpiece, moving the lower die with the arc plate workpiece to be right below the upper die, and enabling the pre-opening holes, the blank pressing die through holes and the lower die holes on the upper die and the arc plate workpiece to be coaxial; 2. pressing the pre-opened hole for three times by an upper die; 3. and demolding after stress relief heat treatment. The invention has the advantages that: the barrel deformation caused by traditional welding manufacturing is effectively avoided, the processing quality of the nuclear power hanging basket barrel is greatly improved, and outlets on four arc plates forming the nuclear power hanging basket barrel can be effectively ensured to be located at the same height position.
Description
Technical Field
The invention relates to the technical field of nuclear reaction equipment, in particular to a method for forming an upper outlet of a nuclear power hanging basket barrel.
Background
The basket barrel is generally divided into an upper section, a middle section and a lower section, wherein the middle section barrel is a large-diameter thin-wall cylinder which is formed by welding a plurality of identical circular arc plates, and the circular arc plates are generally four circular arc plates. Each arc plate of the middle section cylinder body is provided with a medium outlet. Currently, each medium outlet pipe is welded to the cylinder by welding. However, during the welding process: the large-diameter thin-wall cylinder is easy to deform due to welding, and all medium outlets cannot be ensured to be positioned at the same height, so that the product quality cannot be ensured, and the normal use of nuclear power equipment is influenced.
Disclosure of Invention
The purpose of the invention is: the forming method for the upper outlet of the nuclear power hanging basket barrel is provided, and the barrel can be prevented from deforming, so that the quality of nuclear power hanging basket barrel products is greatly improved.
In order to realize the purpose, the invention adopts the technical scheme that: a forming method of an upper outlet of a nuclear power hanging basket barrel adopts a forming tool and an arc plate workpiece, and the forming tool comprises the following steps: the die comprises an upper die, a side pressing die and a lower die, wherein the upper die comprises a conical section die head and a cylindrical section die head from bottom to top, the outer diameter of the conical section die head is gradually increased from bottom to top, and the height of the conical section die head is more than or equal to 150mm; the blank pressing mould includes: the blank pressing die comprises a blank pressing die body, wherein a blank pressing die through hole for an upper die to pass through is formed in the blank pressing die body, and the bottom surface of the blank pressing die body is an arc surface matched with the arc plate workpiece; the lower die comprises: the lower die comprises a lower die body, wherein a lower die hole is formed in the lower die body, the top surface of the lower die body is an arc-shaped supporting surface matched with the arc-shaped plate workpiece, and the upper end part of the lower die hole is in round corner transition to the supporting surface; pre-opening holes are formed in the arc plate workpiece;
the molding step comprises: 1. installing an upper die, a blank pressing die and a lower die on an oil press, heating the arc plate workpiece, hoisting and fixing the arc plate workpiece on the lower die, pressing the blank pressing die on the arc plate workpiece, moving the lower die with the arc plate workpiece to be right below the upper die, and enabling the pre-opening holes, the blank pressing die through holes and the lower die holes on the upper die and the arc plate workpiece to be coaxial;
2. the oil press drives the upper die to carry out three times of pressing on the pre-opening hole, and the pre-forming pressing is carried out for one time: the upper die extends into the pre-opening hole by 50mm; performing secondary preforming and pressing: the upper die extends into the pre-opened hole for 100mm; and (3) three-time forming and pressing: the upper die completely extends into the pre-opening hole, and the edge of the pre-opening hole forms a downward pipe orifice along the guide of the lower die hole;
3. and (4) feeding the arc plate for pressing and blocking the edge pressing die and the lower die into a furnace together for stress relief heat treatment, and then demoulding.
Further, in the method for forming the upper outlet of the nuclear power hanging basket barrel, a threaded connecting hole is formed in the top of the cylindrical section die head of the upper die and is used for being fixed with an upper die connecting rod of an oil press in a threaded mode; the lower die is installed on a movable working platform of the oil press.
Further, in the method for forming the upper outlet of the nuclear power hanging basket barrel, the arc plate workpiece is made of 316H material, and is lifted and fixed on the lower die after being heated to 1000-1100 ℃.
Further, in the forming method of the upper outlet of the nuclear power hanging basket barrel, the upper die, the trimming die and the lower die are integrally cast by HT250 cast iron and then are machined by the numerical control center.
Further, in the forming method of the outlet on the nuclear power hanging basket barrel, an installation groove for installing the balancing weight is formed in the top of the edge pressing die.
Further, in the forming method of the outlet on the nuclear power hanging basket barrel, the pre-opening is an ellipse, the ratio of the size of the long axis of the ellipse to the size of the inner diameter of the formed pipe orifice is 1.25, and the ratio of the size of the short axis of the ellipse to the size of the inner diameter of the formed pipe orifice is 1.48; the inner diameter of the lower die hole is the sum of the inner diameter of the formed pipe orifice and twice the wall thickness of the formed pipe orifice, and the diameter of the bottom of the conical section die head is 85% of the inner diameter of the formed pipe orifice; the diameter of the cylindrical section die head is the inner diameter of the formed pipe orifice.
The invention has the advantages that: 1. the forming device has simple structure and the forming method is effective and feasible. 2. The outlets on the nuclear power hanging basket barrel are manufactured by adopting a pressing method, so that the barrel deformation caused by the traditional welding manufacturing is effectively avoided, the quality of a nuclear power hanging basket barrel product is greatly improved, and the outlets on four arc plates forming the nuclear power hanging basket barrel can be effectively ensured to be positioned at the same height position.
Drawings
FIG. 1 is a schematic structural diagram of a forming tool adopted in the forming method of the outlet on the nuclear power hanging basket barrel.
FIG. 2 is a schematic view of the blank holder die of FIG. 1, shown in plan view.
Detailed Description
The invention is described in further detail below with reference to the figures and preferred embodiments.
As shown in figures 1 and 2, a forming method of an upper outlet of a nuclear power hanging basket barrel adopts a forming tool and an arc plate workpiece 1. The shaping frock includes: an upper die 2, a blank pressing die 3 and a lower die 4. The upper die, the edge pressing die and the lower die are integrally cast by HT250 cast iron and then are machined by a numerical control center machine, so that the machining precision is ensured. The upper die 2 comprises a conical section die head 21 and a cylindrical section die head 22 from bottom to top, the outer diameter of the conical section die head 21 is gradually increased from bottom to top, and the height of the conical section die head 21 is larger than or equal to 150mm. The trimming die 3 includes: blank holder mould through-hole 32 that can supply mould 2 to pass through is seted up on the blank holder mould body 31 to blank holder mould body 31, and the bottom surface of blank holder mould body 31 is the arc surface with arc plate work piece 1 assorted. The top of the trimming die 3 is provided with a mounting groove 33 for mounting a balancing weight. The lower die 4 includes: the lower die comprises a lower die body 41, a lower die hole 42 is formed in the lower die body 41, the top surface of the lower die body 41 is an arc-shaped supporting surface 411 matched with the arc plate workpiece 1, and the top fillet of the lower die hole 42 is transited to the supporting surface 411. The arc plate workpiece 1 is provided with a pre-opening hole 11. The arc plate workpiece is made of 316H material.
In order to effectively ensure the forming quality, in the embodiment, the pre-opening 11 on the arc plate workpiece 1 is an ellipse, the ratio of the major axis dimension of the ellipse to the inner diameter dimension of the formed pipe orifice is 1.25, and the ratio of the minor axis dimension of the ellipse to the inner diameter dimension of the formed pipe orifice is 1.48; the inner diameter of the lower die hole is the sum of the inner diameter of the formed pipe orifice and twice the wall thickness of the formed pipe orifice, and the diameter of the bottom of the conical section die head is 85% of the inner diameter of the formed pipe orifice; the diameter of the cylindrical section die head is the inner diameter of the formed pipe orifice. By adopting the pre-opening hole 11, the lower die hole 42 and the upper die 2, the quality of the formed pipe orifice can be greatly improved.
The molding step comprises: 1. the upper die 2, the blank pressing die 3 and the lower die 4 are installed on an oil press, in the embodiment, a threaded connection hole 221 is formed in the top of the cylindrical section die head 22 of the upper die 2, and the threaded connection hole 221 is used for being fixed with an upper die connecting rod 5 of the oil press in a threaded mode. The lower die 4 is arranged on a movable working platform of the oil press. Heating the arc plate workpiece 1 to 1000-1100 ℃, then hoisting and fixing the arc plate workpiece on the lower die 4, pressing and blocking the edge pressing die 3 on the arc plate workpiece 1, then moving the lower die 4 with the arc plate workpiece 1 to the position right below the upper die 1, and enabling the pre-opening 11, the edge pressing die through hole 32 and the lower die hole 42 on the upper die 2 and the arc plate workpiece 1 to be coaxial.
2. The upper die 2 is driven by the oil press to press the pre-opening hole 11 for three times. Primary preforming and pressing: the upper die 2 extends into the pre-opened hole 11 for 50mm. Performing secondary preforming and pressing: the upper die 2 extends into the pre-opening 11 to a depth of 100mm. And (3) three-time forming and pressing: the upper die 2 projects completely into the pre-opening 11, and the edge of the pre-opening 11 forms a downward nozzle, i.e. an outlet profile, along the guide of the lower die opening 42.
3. And (4) feeding the arc plate for pressing and blocking the edge pressing die and the lower die into a furnace together for stress relief heat treatment, then demoulding, and finishing outlet forming.
The invention has the advantages that: 1. the forming device has simple structure and the forming method is effective and feasible. 2. The outlets on the nuclear power hanging basket barrel are manufactured by adopting a pressing method, so that the barrel deformation caused by the traditional welding manufacturing is effectively avoided, the processing quality of the nuclear power hanging basket barrel is greatly improved, and the outlets on four arc plates forming the nuclear power hanging basket barrel can be effectively ensured to be positioned at the same height position.
Claims (2)
1. The forming method of the upper outlet of the nuclear power hanging basket barrel is characterized by comprising the following steps of: adopt shaping frock and circular arc board work piece, the shaping frock includes: the device comprises an upper die, a trimming die and a lower die, wherein the upper die, the trimming die and the lower die are integrally cast by HT250 cast iron and then machined by a numerical control center; the upper die comprises a conical section die head and a cylindrical section die head from bottom to top, the outer diameter of the conical section die head is gradually increased from bottom to top, and the height of the conical section die head is more than or equal to 150mm; blank pressing mould includes: the blank pressing die comprises a blank pressing die body, wherein a blank pressing die through hole for an upper die to pass through is formed in the blank pressing die body, and the bottom surface of the blank pressing die body is an arc surface matched with an arc plate workpiece; the top of the edge pressing die is provided with a mounting groove for mounting a balancing weight; the lower die comprises: the lower die comprises a lower die body, wherein a lower die hole is formed in the lower die body, the top surface of the lower die body is an arc-shaped supporting surface matched with an arc-plate workpiece, and the fillet of the upper end part of the lower die hole is transited to the supporting surface; pre-opening holes are formed in the arc plate workpiece; the molding step comprises: 1. installing an upper die, a blank pressing die and a lower die on an oil press, heating the arc plate workpiece, hoisting and fixing the arc plate workpiece on the lower die, pressing the blank pressing die on the arc plate workpiece, moving the lower die with the arc plate workpiece to be right below the upper die, and enabling the pre-opening holes, the blank pressing die through holes and the lower die holes on the upper die and the arc plate workpiece to be coaxial; the arc plate workpiece is made of 316H material, and is hoisted and fixed on the lower die after being heated to 1000-1100 ℃; 2. the oil press drives the upper die to carry out three-time pressing on the pre-opening hole, and the one-time pre-forming pressing is carried out: the upper die extends into the pre-opening hole by 50mm; secondary preforming and pressing: the upper die extends into the pre-opened hole for 100mm; and (3) three-time forming and pressing: the upper die completely extends into the pre-opening hole, and the edge of the pre-opening hole forms a downward pipe orifice along the guide of the lower die hole; 3. the arc plate for pressing and blocking the edge pressing die and the lower die are fed into a furnace together for stress relief heat treatment and then are demoulded; the pre-opening hole is an ellipse, the ratio of the major axis size of the ellipse to the inner diameter size of the formed pipe orifice is 1.25, and the ratio of the minor axis size of the ellipse to the inner diameter size of the formed pipe orifice is 1.48; the inner diameter of the lower die hole is the sum of the inner diameter of the formed pipe orifice and twice the wall thickness of the formed pipe orifice, and the diameter of the bottom of the conical section die head is 85% of the inner diameter of the formed pipe orifice; the diameter of the cylindrical section die head is the inner diameter of the formed pipe orifice.
2. The method for forming the outlet on the nuclear power hanging basket barrel body according to claim 1, is characterized in that: the top of the cylindrical section die head of the upper die is provided with a threaded connecting hole, and the threaded connecting hole is used for being fixed with an upper die connecting rod of an oil press in a threaded manner; the lower die is installed on a movable working platform of the oil press.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011624414.3A CN112719087B (en) | 2020-12-31 | 2020-12-31 | Forming method for upper outlet of nuclear power hanging basket barrel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011624414.3A CN112719087B (en) | 2020-12-31 | 2020-12-31 | Forming method for upper outlet of nuclear power hanging basket barrel |
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| CN112719087A CN112719087A (en) | 2021-04-30 |
| CN112719087B true CN112719087B (en) | 2023-01-03 |
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| CN115415408B (en) * | 2022-09-05 | 2023-09-26 | 江苏东方瑞吉能源装备有限公司 | Pipe connecting cover plate pressing die, production method thereof and liner pipe cover plate forming method |
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| CN106270104A (en) * | 2016-09-07 | 2017-01-04 | 哈尔滨工业大学 | A kind of magnetic field impulse hole flanging formation method of housing component |
| CN106964684A (en) * | 2017-03-31 | 2017-07-21 | 华中科技大学 | A kind of complex multi-step local plastic electromagnetic forming method suitable for sheet material workpiece |
| CN207308716U (en) * | 2017-08-04 | 2018-05-04 | 昆山新鸿企业机械制造有限公司 | A kind of flange hole flanging shaping mold |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2419120A2 (en) * | 1978-03-08 | 1979-10-05 | Creusot Loire | METHOD AND INSTALLATION FOR MANUFACTURING A HOLDING TUBING ON A WALL OF VERY HIGH THICKNESS |
| CN202715712U (en) * | 2012-05-10 | 2013-02-06 | 上海云飞工贸发展有限公司 | Die for solving cracking of hole flanging of product |
| CN106391802B (en) * | 2016-11-01 | 2019-03-29 | 苏州市瑞晟制冷设备有限公司 | A kind of impulse- free robustness hemmer and impulse- free robustness flanging process |
| CN109622748A (en) * | 2018-12-29 | 2019-04-16 | 安徽省三荣科技有限公司 | Hole punched device |
| CN110421067B (en) * | 2019-07-19 | 2020-06-09 | 华中科技大学 | Step-by-step forming device and method for pressure accumulator shell |
| CN111842597A (en) * | 2020-07-14 | 2020-10-30 | 永胜机械工业（昆山）有限公司 | Titanium material and special metal pipe orifice extension forming equipment and method |
| CN112091063A (en) * | 2020-08-28 | 2020-12-18 | 珠海格力智能装备有限公司 | Punch structure and punching device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106270104A (en) * | 2016-09-07 | 2017-01-04 | 哈尔滨工业大学 | A kind of magnetic field impulse hole flanging formation method of housing component |
| CN106964684A (en) * | 2017-03-31 | 2017-07-21 | 华中科技大学 | A kind of complex multi-step local plastic electromagnetic forming method suitable for sheet material workpiece |
| CN207308716U (en) * | 2017-08-04 | 2018-05-04 | 昆山新鸿企业机械制造有限公司 | A kind of flange hole flanging shaping mold |
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