CN101288890A - Cooling system of ultra-high strength steel hot stamping forming die - Google Patents
Cooling system of ultra-high strength steel hot stamping forming die Download PDFInfo
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- CN101288890A CN101288890A CNA2007100396066A CN200710039606A CN101288890A CN 101288890 A CN101288890 A CN 101288890A CN A2007100396066 A CNA2007100396066 A CN A2007100396066A CN 200710039606 A CN200710039606 A CN 200710039606A CN 101288890 A CN101288890 A CN 101288890A
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Abstract
The invention discloses a cooling system used for an ultra-high strength steel plate thermal die cutting and forming die. The die comprises a concave die and a concave die seat; a water chamber is arranged between the concave die and the concave die seat; the water chamber is communicated with a water inlet and a water outlet. The water chamber is arranged between the concave die and the concave die seat of the invention; after cooled water is inlet in the water chamber, a steel plate workpiece can be quickly cooled by the thermal conduction between the die and the steel plate so as to meet the quenching condition of the steel plate. Especially, the water chamber is also internally provided with a supporting column; the upper end of the supporting column is contacted with the lower bottom surface of the concave die; the lower end of the supporting column is contacted with the upper bottom surface of the concave die seat; therefore, the structural strength of the concave die is ensured, the flowing direction of the water flow can be guided, flow perturbation conditions can be provided, meanwhile, the heat transfer area is increased, and the heat exchange efficiency between the cooled water and the die is improved.
Description
Technical field
The present invention relates to a kind of hot stamping forming die, particularly relate to the cooling system that is used for ultra-high strength steel hot stamping forming die.
Background technology
The hot forming technology can solve the limitation of ultrahigh-strength steel plates forming property, be used for body of a motor car, can make the complex-shaped load parts that have superhigh intensity simultaneously, the security that not only can improve automobile, alleviate vehicle weight simultaneously, improve the environmental protection and energy saving of automobile.But various countries all face system's thermal balance question in that this technology is used for actual production: on the one hand, hot forming Technology Need steel plate with the speed more than the 20m/s from cooling rapidly more than the recrystallization temperature; On the other hand, mould and steel plate cool off problem consuming time, have limited production efficiency; In addition, different with the traditional cold punching press, hot forming is had higher requirement to production security.Analyzing as can be known more than the summary, Cooling System Design is that the hot forming technology is used for one of key technology of mass production.In existing trial production or the produced in small quantities, mainly adopt gas cooling technology, utilize refrigerating gas (as nitrogen etc.) to spray in the high temperature steel plate to realize quick cooling.This cooling technology needs preparation, storage, conveying, injection and the retracting device of gas, equipment bulky complex; Simultaneously, need process refrigerating gas circulation structure, refrigerating gas injection structure and refrigerating gas collection structure on mould, also intensity, life-span and the manufacturing cost aspect to mould proposes new challenge.In addition, the heat forming technology that cools off after the first punching press is arranged also, again product is dropped into quenching bath after the punch forming, can satisfy cooling velocity, but part deformation is serious, can not reach the precision of auto parts far away.
To cool off by mould and the workpiece of mold cooling system after, should satisfy following requirement hot forming: 1. cooling velocity, promptly mold temperature must satisfy the solid quenching condition, makes the high temperature steel plate cool off crystallization more rapidly, forms high-intensity martensitic structure; 2. the uniformity of mold cavity surface temperature, the mold cavity surface temperature difference causes the steel plate diverse location temperature difference, causes plate tissue odds, low intensity points occurs.3. heat transfer efficiency, the mould store heat will be taken away rapidly after promptly each drop stamping, guarantees that each punching press front mold primary condition is identical, thereby guarantees next stamping quality, guarantee constant product quality.
The cooling system of press forming die is difficult to reach above-mentioned requirements in the prior art.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of cooling system of hot-forming die, can satisfy the cooling requirement of heat forming technology well.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of cooling system of ultra-high strength steel hot stamping forming die, described mould comprises die and die socket, is provided with water cavity between described die and the die socket, and described water cavity is connected with water inlet, delivery port.
The present invention is provided with water cavity between die and die socket, feed cooling water after, utilize hot conduction between mould and the steel plate can realize the rapid cooling of steel plate workpiece, to satisfy the solid quenching condition.Cooling system of the present invention also has the following advantages: carry out when 1. having realized punching press and cooling, guaranteed part strength and required precision; 2. begin to be controlled at 3min to 6min from punching press, accelerated the punching press beat, improved production efficiency to the final cooling time of finishing; 3. mould is in the tangible temperature range of human body substantially, has reduced the requirement to production security.
A kind of preferred version is to be provided with brace rod on the lateral wall of die, is used to regulate current, and current are separated into several strands, and it is distributed in the water cavity; Also improved simultaneously the structural strength of die.
Another kind of preferred version is also to be provided with support column in described water cavity, and the upper end of described support column contacts with the bottom surface of die, and the lower end of support column contacts with the upper bottom surface of die socket.Support column is set is in order to guarantee the structural strength of die, and can guide the current trend, the flow-disturbing condition is provided, increase heat transfer area simultaneously, improve the heat exchange efficiency between cooling water and mould.
Above-mentioned support column can be designed to link to each other with the bottom surface one of die, can eliminate the thermal contact resistance between support column and the die like this, improves heat exchange efficiency.
The cross section of above-mentioned support column is preferably circle, experimental results show that: adopt this cylindrical support column dispersed placement, hot centrostigma is less, and the some temperature difference of hot centrostigma and cooling water flow warp is less; Can increase the current disturbance, avoid unnecessary backflow and whirlpool simultaneously, increase heat exchange efficiency.。
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the STRUCTURE DECOMPOSITION schematic diagram of cooling system of the present invention.
Fig. 2 is the structural representation at the die back side.
Fig. 3 is the temperature field distribution map in the water cavity when adopting straight tabular support column.
Fig. 4 is the temperature field distribution map that adopts in cylindrical support column and the four prism type support column water cavity.
Fig. 5 is the temperature field distribution map in the water cavity when adopting special-shaped tabular support column.
The specific embodiment
As shown in Figure 1, the cooling system of ultra-high strength steel hot stamping forming die of the present invention is provided with water cavity 22 between die 1 and die socket 2, and water cavity 22 is connected with water inlet, delivery port by guiding gutter.Guiding gutter comprises horizontal guiding gutter in the die socket, vertical tank and the water channel 21 that is positioned at die socket surface and die contact position, is used for the cooling water input and output.Because cooling water speed is determined that by omnidistance minimum cross-sectional area therefore when the design guiding gutter, design 4 water channels in water channel 21 places avoid occurring water speed resistance bottleneck.Minimum sectional area is basic identical in total cross-sectional area of final design water channel 21 and the water cavity.
As shown in Figure 2, the lateral wall of die 1 is provided with brace rod 12, is used to regulate current, and current are separated into several strands, and it is distributed in the water cavity; Also improved simultaneously the structural strength of die.Also be provided with support column 11 in the water cavity, the upper end of support column 11 contacts with the bottom surface of die 1, and the lower end of support column 11 contacts with the upper bottom surface of die socket 2.Support column is set is in order to guarantee the structural strength of die, and can guide the current trend, the flow-disturbing condition is provided, increase heat transfer area simultaneously, improve the heat exchange efficiency between cooling water and mould.
The shape of cross section of support column can influence cooling effect, in order to determine the optimum shape of support column, based on processing conditions, 3 groups of 6 kinds of exemplary support post shapes of Preliminary design: the discrete type of straight-plate-type, simple shape, the integral type of complicated shape and discrete type, analyze the influence of difformity to cooling effect, relatively more good and bad, shown in Fig. 3-5.
According to analytical calculation and numerical simulation result:
1. in the straight-plate-type cooling system, support body arrangement is close more, and the current minimum sectional area is few more, and water speed is high more, has increased the cooling water reynolds number Re, and simultaneously straight plate number increases, and has strengthened heat exchange area, and heat exchange efficiency improves.
2. straight-plate-type cooling system flow-disturbing spare is few, and the cooling water reynolds number Re is low, and the water field is based on laminar flow, the heat exchange weak effect.Simultaneously at the supporter core hot concentration phenomenon appears.As shown in Figure 3.
3. in the discrete type cooling system of simple shape, identical Area of bearing, the cylindrical support body is littler than rhombus supporter heat exchange area, but afterbody forms the hot concentrated area of fritter; Rhombus supporter head current are comparatively stable, and reynolds number Re is less, but obvious because of streaming the backflow, whirlpool and the whirlpool Shu Xianxiang that cause at two ends; Take all factors into consideration, the cylindrical support heat transfer rate is 9803W, and rhombus support heat transfer rate is 7023W, so the cylindrical support body is than rhombus supporter good effect of heat exchange.
4. the discrete type of simple shape supports, the supporter dispersed placement, and hot centrostigma is less, and the some temperature difference of hot centrostigma and cooling water flow warp is less; The supporter shape of arrangement and convex surface can increase the current disturbance, avoids unnecessary backflow and whirlpool simultaneously, has increased heat exchange efficiency.As shown in Figure 4.
5. in the discrete type cooling system of complicated shape, both flow-disturbing conditions are suitable, and dispersed placement hot concentration phenomenon occurs between two horizontal direction supporters, and centralized arrangement hot concentrating occur at the support column core.
6. the design original intention of the discrete type of complicated shape support is to increase roughness, thereby increases disturbance, improves heat exchange efficiency.Calculate by analysis and numerical simulation, find whirlpool and backflow to occur, be not heat convection with extraneous heat exchange herein at groove, become solid-liquid simple between heat conduction, reduced the average surface heat exchange efficiency.According to this group analysis, draw the nonreentrant surface conclusion better simultaneously than recessed surface heat exchanging.As shown in Figure 5.
Cylindrical discrete type cooling system, the supporter dispersed placement, hot centrostigma is less, and the some temperature difference of hot centrostigma and cooling water flow warp is less; The supporter shape of arrangement and convex surface can increase the current disturbance, avoids unnecessary backflow and whirlpool simultaneously, has increased heat exchange efficiency.Therefore selecting cylindrical discrete type to support is a kind of optimal case.
After adopting cooling system of the present invention, in the test, the die temperature remains on below 40 degree at the scene, and temperature is in room temperature after the die sinking.The proof cooling system meets the cooling requirement of heat forming technology fully.
The cooling system of ultra-high strength steel hot stamping forming die of the present invention has solved the hot forming technology and has been used for actual production cooling and heat accumulative two difficult problems of dispersing fast, for the actual production of hot press-formed technology provides support.
Claims (6)
1. the cooling system of a ultra-high strength steel hot stamping forming die, described mould comprises die (1) and die socket (2), it is characterized in that: be provided with water cavity (22) between described die (1) and the die socket (2), described water cavity (22) is connected with water inlet, delivery port.
2. the cooling system of ultra-high strength steel hot stamping forming die according to claim 1, it is characterized in that: the lateral wall of described die (1) is provided with brace rod (12).
3. the cooling system of ultra-high strength steel hot stamping forming die according to claim 1 and 2, it is characterized in that: be provided with support column (11) in the described water cavity (22), the upper end of described support column (11) contacts with the bottom surface of die (1), and the lower end of support column (11) contacts with the upper bottom surface of die socket (2).
4. the cooling system of ultra-high strength steel hot stamping forming die according to claim 3, it is characterized in that: described support column (11) links to each other with the bottom surface one of die (1).
5. the cooling system of ultra-high strength steel hot stamping forming die according to claim 4 is characterized in that: the cross section of described support column (11) is for circular.
6. the cooling system of ultra-high strength steel hot stamping forming die according to claim 3 is characterized in that: the cross section of described support column (11) is for circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710039606 CN101288890B (en) | 2007-04-18 | 2007-04-18 | Cooling system of ultra-high strength steel hot stamping forming die |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710039606 CN101288890B (en) | 2007-04-18 | 2007-04-18 | Cooling system of ultra-high strength steel hot stamping forming die |
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| CN101288890A true CN101288890A (en) | 2008-10-22 |
| CN101288890B CN101288890B (en) | 2011-04-06 |
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| CN 200710039606 Expired - Fee Related CN101288890B (en) | 2007-04-18 | 2007-04-18 | Cooling system of ultra-high strength steel hot stamping forming die |
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| WO2011063622A1 (en) * | 2009-11-24 | 2011-06-03 | 机械科学研究总院先进制造技术研究中心 | Hot stamping female die assembly, hot stamping male die assembly and hot stamping die |
| CN102151780A (en) * | 2011-03-02 | 2011-08-17 | 青岛益友锻压机械有限公司 | Complex part precision forging die with back pressure structure |
| CN103111527A (en) * | 2013-02-28 | 2013-05-22 | 江苏大学 | Hot forming die with combined cooling female die and changeable movable base plate |
| CN103121062A (en) * | 2011-11-17 | 2013-05-29 | 财团法人金属工业研究发展中心 | Mold and method for adjusting cooling efficiency of mold in sections |
| CN103143627A (en) * | 2011-12-07 | 2013-06-12 | 现代自动车株式会社 | Mold for hot stamping and method of manufacturing the same |
| CN103409613A (en) * | 2013-08-30 | 2013-11-27 | 上海交通大学 | Method for realizing gradient property distribution of hot stamping workpiece |
| CN104438831A (en) * | 2014-11-03 | 2015-03-25 | 重庆至信实业有限公司 | Progressive die convenient to replace |
| CN105251802A (en) * | 2015-11-05 | 2016-01-20 | 福州大学 | Thermal stamping method for high-strength medium-thick steel plate |
| CN107363142A (en) * | 2016-05-13 | 2017-11-21 | 株式会社日立制作所 | The heat stamping and shaping control method of clad metal sheet |
| CN107486508A (en) * | 2017-09-26 | 2017-12-19 | 张家港市Aaa轴承有限公司 | A kind of protection punch press of mould production |
| CN108327325A (en) * | 2018-02-01 | 2018-07-27 | 邓瑜 | A kind of efficient shaping device of bag manufacture luggage case |
| CN108380761A (en) * | 2018-03-20 | 2018-08-10 | 广州腾城信息科技有限公司 | Automatic conveying heating hot stamping die |
| CN109013898A (en) * | 2018-07-20 | 2018-12-18 | 江麓机电集团有限公司 | A kind of high strength steel plate pressure of the netted molding muscle structure of large size is quenched mould and moulding process |
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| CN110961532A (en) * | 2019-12-20 | 2020-04-07 | 翟述基 | Large water-cooling mold for hot forming of high-strength steel plate |
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| US6598451B2 (en) * | 2001-11-02 | 2003-07-29 | Sequa Can Machinery, Inc. | Internally cooled tool pack |
| JP3863874B2 (en) * | 2003-10-02 | 2006-12-27 | 新日本製鐵株式会社 | Hot press forming apparatus and hot press forming method for metal plate material |
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- 2007-04-18 CN CN 200710039606 patent/CN101288890B/en not_active Expired - Fee Related
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2011063622A1 (en) * | 2009-11-24 | 2011-06-03 | 机械科学研究总院先进制造技术研究中心 | Hot stamping female die assembly, hot stamping male die assembly and hot stamping die |
| CN102151780A (en) * | 2011-03-02 | 2011-08-17 | 青岛益友锻压机械有限公司 | Complex part precision forging die with back pressure structure |
| CN103121062A (en) * | 2011-11-17 | 2013-05-29 | 财团法人金属工业研究发展中心 | Mold and method for adjusting cooling efficiency of mold in sections |
| CN103143627B (en) * | 2011-12-07 | 2016-12-21 | 现代自动车株式会社 | For the mould of drop stamping and the method that manufactures this mould |
| CN103143627A (en) * | 2011-12-07 | 2013-06-12 | 现代自动车株式会社 | Mold for hot stamping and method of manufacturing the same |
| US9168617B2 (en) | 2011-12-07 | 2015-10-27 | Hyundai Motor Company | Mold for hot stamping and method of manufacturing the same |
| US10421112B2 (en) | 2011-12-07 | 2019-09-24 | Hyundai Motor Company | Mold for hot stamping and method of manufacturing the same |
| CN103111527A (en) * | 2013-02-28 | 2013-05-22 | 江苏大学 | Hot forming die with combined cooling female die and changeable movable base plate |
| CN103409613A (en) * | 2013-08-30 | 2013-11-27 | 上海交通大学 | Method for realizing gradient property distribution of hot stamping workpiece |
| CN104438831A (en) * | 2014-11-03 | 2015-03-25 | 重庆至信实业有限公司 | Progressive die convenient to replace |
| CN105251802A (en) * | 2015-11-05 | 2016-01-20 | 福州大学 | Thermal stamping method for high-strength medium-thick steel plate |
| CN107363142A (en) * | 2016-05-13 | 2017-11-21 | 株式会社日立制作所 | The heat stamping and shaping control method of clad metal sheet |
| CN107363142B (en) * | 2016-05-13 | 2020-11-03 | 株式会社日立制作所 | Hot stamping forming control method of composite metal plate |
| CN107486508A (en) * | 2017-09-26 | 2017-12-19 | 张家港市Aaa轴承有限公司 | A kind of protection punch press of mould production |
| CN108327325A (en) * | 2018-02-01 | 2018-07-27 | 邓瑜 | A kind of efficient shaping device of bag manufacture luggage case |
| CN108380761B (en) * | 2018-03-20 | 2019-08-20 | 青岛应运汽车零部件有限公司 | Automatic conveying heating hot stamping die |
| CN108380761A (en) * | 2018-03-20 | 2018-08-10 | 广州腾城信息科技有限公司 | Automatic conveying heating hot stamping die |
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| CN110219210B (en) * | 2019-01-31 | 2024-02-27 | 浙江舒康科技有限公司 | Pulp molding production line and processing method |
| CN110293166A (en) * | 2019-07-03 | 2019-10-01 | 太原科技大学 | A kind of texture preparation method and device for valve plate of plunger pump |
| CN110328294A (en) * | 2019-07-23 | 2019-10-15 | 临海市欧中汽车模具股份有限公司 | A kind of continuous stamping die with cooling system |
| CN110328294B (en) * | 2019-07-23 | 2020-12-11 | 临海市欧中汽车模具股份有限公司 | Continuous stamping die with cooling system |
| CN110961532A (en) * | 2019-12-20 | 2020-04-07 | 翟述基 | Large water-cooling mold for hot forming of high-strength steel plate |
| CN110961532B (en) * | 2019-12-20 | 2021-06-29 | 翟述基 | Large water-cooling mold for hot forming of high-strength steel plate |
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