CN112059018A - Method for molding special-shaped water gap by using single-process special-shaped piece mold - Google Patents
Method for molding special-shaped water gap by using single-process special-shaped piece mold Download PDFInfo
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- CN112059018A CN112059018A CN202011069535.6A CN202011069535A CN112059018A CN 112059018 A CN112059018 A CN 112059018A CN 202011069535 A CN202011069535 A CN 202011069535A CN 112059018 A CN112059018 A CN 112059018A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 10
- 238000000465 moulding Methods 0.000 title claims description 6
- 238000007493 shaping process Methods 0.000 claims abstract description 19
- 239000011265 semifinished product Substances 0.000 claims description 69
- 230000001050 lubricating effect Effects 0.000 claims description 26
- 239000004677 Nylon Substances 0.000 claims description 13
- 229920001778 nylon Polymers 0.000 claims description 13
- 239000004642 Polyimide Substances 0.000 claims description 10
- 229920001721 polyimide Polymers 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- 238000005336 cracking Methods 0.000 abstract description 3
- 238000012938 design process Methods 0.000 abstract 1
- 239000000314 lubricant Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a design process of a single-process special-shaped drawing piece mold forming water gap, and belongs to the technical field of water gap forming molds and processes. The device comprises six sets of dies, namely a flange cylinder first stretching die, a flange cylinder second stretching die, a flange cone stretching die, a flange special-shaped stretching die, a bottom rectangle stretching die and an integral shaping die, wherein the six dies are used for sequentially realizing primary stretching, secondary stretching, flange cone stretching, bottom rectangle stretching and integral shaping of a cylinder, particularly when the bottom rectangle is stretched, the phenomenon of tension cracking is easy to occur, and when the pressure variation force is properly adjusted to be within the range of 20-25 KN, the phenomenon of tension cracking can be effectively avoided, and the yield of products is greatly improved.
Description
Technical Field
The invention relates to the technical field of nozzle forming molds and processes, in particular to a method for forming a special-shaped nozzle by a single-process special-shaped piece mold.
Background
The steel pouring opening is arranged on one side of the bottom of the ladle and can enable molten steel to flow out of the ladle, so the steel pouring opening is also called a ladle nozzle.
The ladle nozzle is generally a pouring part, but a thin-wall part is adopted along with the technical progress, the existing ladle nozzle is shown in figure 2, the forming of the special-shaped nozzle is realized through a series of stretching, but when the bottom rectangle is stretched in the stretching process, the phenomenon of long-time stretch cracking occurs, and the yield is influenced.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a method for molding a special-shaped water gap by using a single-process special-shaped piece mold.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for molding a special-shaped water gap by a single-process special-shaped piece mold comprises six sets of molds, namely a flange cylinder first stretching mold, a flange cylinder second stretching mold, a flange cone stretching mold, a flange special-shaped stretching mold, a bottom rectangular stretching mold and an integral shaping mold, and comprises the following process steps:
step one, primary cylinder stretching: mounting the cut circular plate on a working platform of a press machine where a flange cylinder I stretching die is located, and performing primary flange cylinder I stretching on the circular plate through the flange cylinder I stretching die to obtain a flange cylinder semi-finished product;
step two, cylinder redrawing: taking down the flange cylinder semi-finished product, moving the flange cylinder semi-finished product to a working platform of a press machine where a flange cylinder secondary stretching die is located, and stretching the flange cylinder semi-finished product again through the flange cylinder secondary stretching die to obtain a flange cylinder secondary semi-finished product;
step three, stretching the flange cone: taking down the second semi-finished product of the flange cylinder, moving the second semi-finished product of the flange cylinder to a working platform of a press machine where a flange conical stretching die is located, and stretching the second semi-finished product of the flange cylinder through the flange conical stretching die to obtain a flange conical semi-finished product;
step four, stretching the flange in a special shape: taking down the flange cone semi-finished product, moving the flange cone semi-finished product to a working platform of a press machine where a flange special-shaped stretching die is located, and stretching the flange cone semi-finished product through the flange special-shaped stretching die to obtain a flange special-shaped semi-finished product;
step five, stretching the bottom rectangle: taking down the flange special-shaped semi-finished product, moving the flange special-shaped semi-finished product to a working platform of a press machine where a bottom rectangular stretching die is located, stretching the flange special-shaped semi-finished product through the bottom rectangular stretching die, increasing pressure and variable force in the stretching process, adjusting the pressure and variable force to 20-25 KN, and then obtaining the bottom rectangular stretching semi-finished product;
step six, integral shaping: and taking down the bottom rectangular stretched semi-finished product, moving the bottom rectangular stretched semi-finished product to a working platform of a press machine where an integral shaping die is located, shaping the bottom rectangular stretched semi-finished product through the integral shaping die, and then obtaining a finished product of the special-shaped water gap.
According to a further preferred embodiment of the present invention, in the fifth operation, the flange profile semi-finished product is preliminarily preheated to a temperature of 150 ℃ to 250 ℃ before stretching.
According to a further preferable scheme of the invention, after the stretching is finished, the bottom rectangular stretching die and the bottom rectangular stretching semi-finished product are cooled and cooled before being separated, wherein the cooling and cooling speed is reduced by 10-15 ℃ every ten seconds.
According to a further preferable scheme of the invention, the temperature difference between the upper die and the lower die of the six groups of dies is 60-130 ℃, and the upper die and the corresponding lower die are in a constant temperature state.
According to a further preferable scheme of the invention, lubricating layers are arranged on the surfaces of the upper die and the lower die of the upper six groups of dies, each lubricating layer comprises a polyimide lubricating layer and a nylon lubricating layer which are alternately arranged, and the thickness of the adjacent polyimide lubricating layers is not more than the thickness of the nylon lubricating layer and is not less than one third of the thickness of the nylon lubricating layer.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention realizes the primary stretching, secondary stretching, flange cone stretching, bottom rectangle stretching and integral shaping of the cylinder in sequence by six dies, particularly the pulling crack phenomenon is easy to occur when the bottom rectangle is stretched, and the pulling crack phenomenon can be effectively avoided when the pressure-variable force is properly adjusted to be in the range of 2000KG-2500KG, thereby greatly improving the yield of products.
2. The invention can greatly improve the plasticity of the workpiece, avoid the tension crack phenomenon in the stretching process and greatly improve the stretching yield by carrying out preliminary preheating before the flange semi-finished product is stretched at the preheating temperature of 150-250 ℃, and simultaneously, the flange semi-finished product is cooled after being stretched and is reduced by 10-15 ℃ every ten seconds, thereby preventing the recrystallization in the workpiece and improving the stretching quality.
3. The invention utilizes the constant temperature between the upper die and the lower die of the six groups of dies and the temperature difference is 60 ℃ to 130 ℃, can reduce the transformation from internal austenite to martensite, and can effectively reduce stress concentration and avoid the hardening and embrittlement of stainless steel materials, thereby effectively improving the stretching quality.
4. The lubricating layers are arranged on the surfaces of the upper die and the lower die of the six groups of dies, and the lubricating layer which adopts a multilayer structure and consists of the polyimide lubricating layer and the nylon lubricating layer is used for comprehensively achieving the lubricating effect by means of the low surface tension of the polyimide lubricating layer and the plastic viscosity of nylon.
Drawings
FIG. 1 is a drawing of the forming step of the drawing process of the present invention;
fig. 2 is a structural schematic view of the special-shaped nozzle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
As shown in fig. 1, a method for molding a special-shaped nozzle by using a single-process special-shaped piece mold comprises six sets of molds, namely a flange cylinder first stretching mold, a flange cylinder second stretching mold, a flange cone stretching mold, a flange special-shaped stretching mold, a bottom rectangular stretching mold and an integral shaping mold, and comprises the following process steps:
step one, primary cylinder stretching: mounting the cut circular plate on a working platform of a press machine where a flange cylinder I stretching die is located, and performing primary flange cylinder I stretching on the circular plate through the flange cylinder I stretching die to obtain a flange cylinder semi-finished product;
step two, cylinder redrawing: taking down the flange cylinder semi-finished product, moving the flange cylinder semi-finished product to a working platform of a press machine where a flange cylinder secondary stretching die is located, and stretching the flange cylinder semi-finished product again through the flange cylinder secondary stretching die to obtain a flange cylinder secondary semi-finished product;
step three, stretching the flange cone: taking down the second semi-finished product of the flange cylinder, moving the second semi-finished product of the flange cylinder to a working platform of a press machine where a flange conical stretching die is located, and stretching the second semi-finished product of the flange cylinder through the flange conical stretching die to obtain a flange conical semi-finished product;
step four, stretching the flange in a special shape: taking down the flange cone semi-finished product, moving the flange cone semi-finished product to a working platform of a press machine where a flange special-shaped stretching die is located, and stretching the flange cone semi-finished product through the flange special-shaped stretching die to obtain a flange special-shaped semi-finished product;
step five, stretching the bottom rectangle: taking down the flange special-shaped semi-finished product, moving the flange special-shaped semi-finished product to a working platform of a press machine where a bottom rectangular stretching die is located, stretching the flange special-shaped semi-finished product through the bottom rectangular stretching die, increasing pressure variation force in the stretching process, adjusting the pressure variation force to 20-25 KN, preferably 24.5KN, and then obtaining the bottom rectangular stretching semi-finished product;
step six, integral shaping: and taking down the bottom rectangular stretched semi-finished product, moving the bottom rectangular stretched semi-finished product to a working platform of a press machine where an integral shaping die is located, shaping the bottom rectangular stretched semi-finished product through the integral shaping die, and then obtaining a finished product of the special-shaped water gap.
The invention realizes the primary stretching, secondary stretching, flange conical stretching, bottom rectangular stretching and integral shaping of the cylinder in sequence by six dies, particularly the pulling crack phenomenon is easy to occur during the bottom rectangular stretching, and the pulling crack phenomenon can be effectively avoided when the pressure-variable force is properly adjusted to be within the range of 20-25 KN, thereby greatly improving the yield of products.
Example 2:
the following modifications are made on the basis of example 1: in the fifth operation, the flange special-shaped semi-finished product is preliminarily preheated to the temperature of 210 ℃ before stretching.
According to a further preferable scheme of the invention, after the stretching is finished, the bottom rectangular stretching die and the bottom rectangular stretching semi-finished product are cooled and cooled before being separated, and the cooling and cooling speed is reduced by 13 ℃ every ten seconds.
The invention can greatly improve the plasticity of the workpiece, avoid the tension crack phenomenon in the stretching process and greatly improve the stretching yield by carrying out preliminary preheating before the flange semi-finished product is stretched at the preheating temperature of 150-250 ℃, and simultaneously, the flange semi-finished product is cooled after being stretched and is reduced by 10-15 ℃ every ten seconds, thereby preventing the recrystallization in the workpiece and improving the stretching quality.
Example 3:
the following modifications are made on the basis of example 1: the temperature difference between the upper die and the lower die of the six groups of dies is 60-130 ℃, preferably 124 ℃, and the upper die and the corresponding lower die are in constant temperature states.
The invention utilizes the constant temperature between the upper die and the lower die of the six groups of dies and the temperature difference is 60 ℃ to 130 ℃, can reduce the transformation from internal austenite to martensite, and can effectively reduce stress concentration and avoid the hardening and embrittlement of stainless steel materials, thereby effectively improving the stretching quality.
Example 4:
the following modifications are made on the basis of example 1: the surface of last mould and the lower mould of going up six groups of moulds is provided with the lubricant film, the lubricant film is including polyimide lubricant film and the nylon lubricant film that sets up alternately, the thickness of adjacent polyimide lubricant film is not more than nylon lubricant film thickness and is not less than the third of nylon lubricant film thickness again simultaneously.
The lubricating layers are arranged on the surfaces of the upper die and the lower die of the six groups of dies, and the lubricating layer which adopts a multilayer structure and consists of the polyimide lubricating layer and the nylon lubricating layer is used for comprehensively achieving the lubricating effect by means of the low surface tension of the polyimide lubricating layer and the plastic viscosity of nylon.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitution may be of partial structures, devices, method steps, or may be a complete solution. The technical solution and the inventive concept thereof according to the present invention should be equally replaced or changed within the protection scope of the present invention.
Claims (5)
1. The method for molding the special-shaped water gap by using the single-process special-shaped piece mold is characterized by comprising six sets of molds, namely a flange cylinder I stretching mold, a flange cylinder II stretching mold, a flange cone stretching mold, a flange special-shaped stretching mold, a bottom rectangular stretching mold and an integral shaping mold, and comprises the following process steps:
step one, primary cylinder stretching: mounting the cut circular plate on a working platform of a press machine where a flange cylinder I stretching die is located, and performing primary flange cylinder I stretching on the circular plate through the flange cylinder I stretching die to obtain a flange cylinder semi-finished product;
step two, cylinder redrawing: taking down the flange cylinder semi-finished product, moving the flange cylinder semi-finished product to a working platform of a press machine where a flange cylinder secondary stretching die is located, and stretching the flange cylinder semi-finished product again through the flange cylinder secondary stretching die to obtain a flange cylinder secondary semi-finished product;
step three, stretching the flange cone: taking down the second semi-finished product of the flange cylinder, moving the second semi-finished product of the flange cylinder to a working platform of a press machine where a flange conical stretching die is located, and stretching the second semi-finished product of the flange cylinder through the flange conical stretching die to obtain a flange conical semi-finished product;
step four, stretching the flange in a special shape: taking down the flange cone semi-finished product, moving the flange cone semi-finished product to a working platform of a press machine where a flange special-shaped stretching die is located, and stretching the flange cone semi-finished product through the flange special-shaped stretching die to obtain a flange special-shaped semi-finished product;
step five, stretching the bottom rectangle: taking down the flange special-shaped semi-finished product, moving the flange special-shaped semi-finished product to a working platform of a press machine where a bottom rectangular stretching die is located, stretching the flange special-shaped semi-finished product through the bottom rectangular stretching die, increasing pressure and variable force in the stretching process, adjusting the pressure and variable force to 20-25 KN, and then obtaining the bottom rectangular stretching semi-finished product;
step six, integral shaping: and taking down the bottom rectangular stretched semi-finished product, moving the bottom rectangular stretched semi-finished product to a working platform of a press machine where an integral shaping die is located, shaping the bottom rectangular stretched semi-finished product through the integral shaping die, and then obtaining a finished product of the special-shaped water gap.
2. A method of forming a profiled gate end in a single pass profile die as claimed in claim 1, wherein in step five the flange profile blank is initially preheated to a temperature of 150 ℃ to 250 ℃ prior to drawing.
3. A method for forming a profiled sprue according to claim 2 wherein the cooling rate is reduced by 10 to 15 ℃ per ten seconds after the drawing is completed before the bottom rectangular drawing die is separated from the bottom rectangular drawn semifinished product.
4. A method for forming a special-shaped nozzle by a single-process special-shaped piece die according to claim 1, wherein the temperature difference between the upper die and the lower die of the six sets of dies is 60 ℃ to 130 ℃, and the upper die and the corresponding lower die are in a constant temperature state.
5. A method for forming a special-shaped nozzle by a single-process special-shaped piece die as claimed in claim 1, wherein lubricating layers are arranged on the surfaces of the upper die and the lower die of the upper six sets of dies, each lubricating layer comprises a polyimide lubricating layer and a nylon lubricating layer which are arranged alternately, and the thickness of the adjacent polyimide lubricating layers is not more than the thickness of the nylon lubricating layer and is not less than one third of the thickness of the nylon lubricating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069535.6A CN112059018B (en) | 2020-09-30 | 2020-09-30 | Method for molding special-shaped water gap by single-engineering special-shaped piece mold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069535.6A CN112059018B (en) | 2020-09-30 | 2020-09-30 | Method for molding special-shaped water gap by single-engineering special-shaped piece mold |
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| CN112059018A true CN112059018A (en) | 2020-12-11 |
| CN112059018B CN112059018B (en) | 2024-04-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101406911A (en) * | 2008-11-24 | 2009-04-15 | 喻建鹏 | Technique for stretching workpiece with flange |
| KR101659737B1 (en) * | 2015-03-24 | 2016-09-26 | 에스테크 주식회사 | Manufacturing method of filler pipe of refill hole of automobile fuel tank and molding apparatus for the same |
| CN106583552A (en) * | 2015-10-15 | 2017-04-26 | 东莞市华世邦精密模具有限公司 | Stretching die of rectangular copper-nickel-zinc alloy product and stretching technology of stretching die |
| CN108372234A (en) * | 2018-01-18 | 2018-08-07 | 无锡曙光模具有限公司 | A kind of molding processing method of end cap and its drawing forming mold |
| CN109079028A (en) * | 2018-08-22 | 2018-12-25 | 成都同泰汽车零部件有限公司 | A kind of automotive muffler cold end Profiled double-deck shell drawing work and drawing die |
-
2020
- 2020-09-30 CN CN202011069535.6A patent/CN112059018B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101406911A (en) * | 2008-11-24 | 2009-04-15 | 喻建鹏 | Technique for stretching workpiece with flange |
| KR101659737B1 (en) * | 2015-03-24 | 2016-09-26 | 에스테크 주식회사 | Manufacturing method of filler pipe of refill hole of automobile fuel tank and molding apparatus for the same |
| CN106583552A (en) * | 2015-10-15 | 2017-04-26 | 东莞市华世邦精密模具有限公司 | Stretching die of rectangular copper-nickel-zinc alloy product and stretching technology of stretching die |
| CN108372234A (en) * | 2018-01-18 | 2018-08-07 | 无锡曙光模具有限公司 | A kind of molding processing method of end cap and its drawing forming mold |
| CN109079028A (en) * | 2018-08-22 | 2018-12-25 | 成都同泰汽车零部件有限公司 | A kind of automotive muffler cold end Profiled double-deck shell drawing work and drawing die |
Non-Patent Citations (1)
| Title |
|---|
| 刘武胜: "阶梯矩形壳体拉伸模", 模具工业, no. 02 * |
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Denomination of invention: A Method for Forming Irregular Water Mouth in a Single Engineering Irregular Part Mold Granted publication date: 20240405 Pledgee: China Postal Savings Bank Co.,Ltd. Ma'anshan Branch Pledgor: MAANSHAN RUIHENG PRECISION MANUFACTURING Co.,Ltd. Registration number: Y2024980022533 |
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Effective date of registration: 20240701 Address after: No. 6 Taigan West Road, Huhe Industrial Park, Huhe Town, Dangtu County, Ma'anshan City, Anhui Province, 243000 Patentee after: Ma'anshan Xinrui Intelligent Equipment Co.,Ltd. Country or region after: China Address before: 243000 No. 151, Yutian Road, economic and Technological Development Zone, Maanshan City, Anhui Province Patentee before: MAANSHAN RUIHENG PRECISION MANUFACTURING Co.,Ltd. Country or region before: China |
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