CN204711008U - A kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould - Google Patents
A kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould Download PDFInfo
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- CN204711008U CN204711008U CN201520480822.4U CN201520480822U CN204711008U CN 204711008 U CN204711008 U CN 204711008U CN 201520480822 U CN201520480822 U CN 201520480822U CN 204711008 U CN204711008 U CN 204711008U
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Abstract
A kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould, comprise punch, punch cooling water pipe, die, die cooling water pipe, cooling water recirculation system, hydraulic pamp and bosh, it is characterized in that, described punch inside is provided with punch cooling water pipe, die cooling water pipe is provided with in described die, the porch of described die cooling water pipe and punch cooling water pipe is communicated with hydraulic pamp, the exit of described die cooling water pipe and punch cooling water pipe is communicated with cooling water recirculation system, the outlet of described cooling water recirculation system is communicated with bosh, the entrance of described hydraulic pamp stretches into bosh inside.The utility model adopts the method arranging cooling-water duct in punch and die to reduce mold temperature, thus ensures the quality preparing model.
Description
Technical field
The utility model belongs to heat stamping and shaping cooling experiment device, is specially a kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould.
Background technology
U-shaped drop stamping experiment is carried out to 22MnB5 boron steel.Analyzed by the physical dimension to heat-punch member, microstructure and mechanical property, verify feasibility and the reliability of this hot press-formed technique, significant pilot study has been carried out in the extensive use for hot press-formed technology.
On current automobile, high strength steel heat-punch member is applied structural member more widely and is mainly contained A post, B post, for U-shaped of B post simplified model in experiment, uses 22MnB5 boron steel to carry out drop stamping experiment.
Drop stamping technological process comprises following four steps:
The first step: heating and thermal insulation stage
Plate is put into heating furnace heating and thermal insulation, make its complete austenitizing be the first step that drop stamping is tested.Heating-up temperature and temperature retention time can affect hot press-formed process and drip molding quality, so will choose suitable temperature and temperature retention time.
Choose the foundation of austenitizing temperature: one is more than steel plate austenitizing temperature, obtains austenite structure completely, provide condition for follow-up quenching obtains martensite; Two are selected at metal can there is below the temperature of strong oxidation reaction, avoids material oxidation to cause defect; Three is the thermal loss considering follow-up blank transfer process, and start temperature to ensure to be shaped, the heating-up temperature that this experiment is selected is 950 DEG C.Holding furnace temperature is set as 950 DEG C, after furnace temperature is stable, plate is put into.
In order to reach the object obtaining more martensitic structures after punching press is quenched, must be incubated after blank heating, allowing residual cementite fully dissolve, obtaining uniform austenite structure.Meanwhile, because original structure has a great impact stamping parts quality, the long meeting of temperature retention time causes grain growth, can reduce the quality of stamping parts, so temperature retention time is 5min.
Second step: transfer process
Plate is transferred on mould fast from heating furnace.The plate of 950 DEG C is transferred in the process of diel from heating furnace, owing to contacting with the air of 20 DEG C, can carry out exchange heat between plate and air.According to simulation result, in order to ensure that plate has good mobility in stamping process, many martensitic structures can be obtained in quenching process simultaneously, preferably can ensure that the initial temperature of punching press is more than 800 DEG C, in transfer process, the thermal loss of plate is very large, so will shorten transfer time as far as possible.Average out to 8s transfer time each in this experiment.
3rd step: stamping process
According to the drawing velocity interval that the known 25mm/s-45mm/s of simulation result is suitable, the drawing velocity of this experimental selection 25mm/s carries out drop stamping experiment.
4th step: pressurize setting period
After hot stamping operation terminates, do not take out plate, treat that it continues cooling in a mold, below Ms (martensite start) point can be reached according to the known pressurize 3s of simulation result, but in order to ensure martensite transfor mation amount, in experiment until plate temperature be down to Mf temperature (about 200 DEG C) below after terminate pressurize, the dwell time selected in this experiment is 1min.
High-strength steel hot stamping operation and traditional cold stamping are very different, and because blank is in the condition of high temperature, and there are certain requirements the cooling velocity of blank in forming process, so hot stamping die must integrate sheet forming and quenching effect.High-strength steel hot stamping die is at its Material selec-tion, and the everyways such as structural design have strict requirement, and this mainly comprises:
(1) drop stamping is the process that a variations in temperature is very complicated, so not only require that mould has high rigidity, hardness and fatigue resistance etc., more need mould can under the violent condition that colds and heat succeed each other, thermal friction between opposing and blank, so there is very high requirement on the hot press-formed surface to mould.
(2) in order to meet the quenching requirement of heat-punch member, hot stamping die must just have good heat conductivility, or designs cooling system in a mold, to meet the requirement of heat forming processes to cooling velocity.If the cooling capacity of mould is inadequate, not only can affects the intensity of drip molding, also can produce the mold hot crackle that Yin Gaowen causes in forming process, and then affect the dimensional accuracy of part.
Summary of the invention
The purpose of this utility model is to provide a kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould, meets the requirement to cooling velocity in hot stamping operation.
The utility model realizes by the following technical solutions:
A kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould, comprise punch, punch cooling water pipe, die, die cooling water pipe, cooling water recirculation system, hydraulic pamp and bosh, described punch inside is provided with punch cooling water pipe, die cooling water pipe is provided with in described die, the porch of described die cooling water pipe and punch cooling water pipe is communicated with hydraulic pamp, the exit of described die cooling water pipe and punch cooling water pipe is communicated with cooling water recirculation system, the outlet of described cooling water recirculation system is communicated with bosh, the entrance of described hydraulic pamp stretches into bosh inside.
In the utility model, described punch cooling water pipe is distributed in inside the convex globoidal of punch, and described die cooling water pipe is distributed in inside the cancave cambered surface of die.
Beneficial effect: the utility model adopts the method arranging cooling-water duct in punch and die to reduce mold temperature, thus ensure the quality preparing model.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of punch of the present utility model and die;
Fig. 3 is the perspective view of punch of the present utility model;
Fig. 4 is the perspective view of die of the present utility model.
Detailed description of the invention
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
See Fig. 1, the structural representation of a kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould, a kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould, comprise punch 1, punch cooling water pipe 2, die 3, die cooling water pipe 4, cooling water recirculation system 5, hydraulic pamp 6 and bosh 7, described punch 1 inside is provided with punch cooling water pipe 2, die cooling water pipe 4 is provided with in described die 3, the porch of described die cooling water pipe 4 and punch cooling water pipe 2 is communicated with hydraulic pamp 6, the exit of described die cooling water pipe 4 and punch cooling water pipe 2 is communicated with cooling water recirculation system 5, the outlet of described cooling water recirculation system 5 is communicated with bosh 7, the entrance of described hydraulic pamp 6 stretches into bosh 7 inside.
See Fig. 2, Fig. 3, Fig. 4, a kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling punch of experiment mould and the structural representation of die, described punch cooling water pipe 2 is distributed in inside the convex globoidal of punch 1, and described die cooling water pipe 4 is distributed in inside the cancave cambered surface of die 3.
Cooling in hot stamping operation is the key of the hot press-formed technology of research high-strength steel, is also the key problem in technology obtaining qualified high strength stamping parts.In actual production, punching course is continuous print, the blank of high temperature and mould carry out exchange heat, along with the carrying out produced, the temperature of mould can raise always, temperature difference between such blank and mould can reduce, heat transfer rate can decline a lot, namely may can not meet the critical cooling rate obtaining martensitic structure.In hot forming process, obtaining the cooling velocity of requirement in order to meet plate, just needing to ensure that the temperature of mould can not be too high.Mold temperature rising simultaneously can reduce the mold use life-span.So adopt the method arranging cooling-water duct in punch and die to reduce mold temperature in experiment.Water enters mould by hydraulic pamp, flows in passage in a mold, flows out, cooling water reusable edible after taking away heat from delivery port, cost-saving.The sealing of cooling water pipe interface to be ensured in experimentation, avoid water to touch blank.
In experimentation, start hydraulic pamp 6, cold water in bosh 7 is pumped in punch cooling water pipe 2 and die cooling water pipe 4 by hydraulic pamp 6, the blank of high temperature is put between punch 1 and die 3, pass through drop stamping, the blank of high temperature is pressed into model, punch cooling water pipe 2 and die cooling water pipe 4 absorb the heat on punch 1 and die 3, ensure the quality of model, the water flowed out from punch cooling water pipe 2 and die cooling water pipe 4 is recycled in bosh 7 and recycles after entering and cooling cooling water recirculation system 5.
More than show and describe general principle of the present utility model and principal character and advantage of the present utility model, the technical staff of the industry should understand, the utility model is not restricted to the described embodiments, what describe in above-described embodiment and description just illustrates principle of the present utility model, under the prerequisite not departing from the utility model spirit and scope, the utility model also has various changes and modifications, these changes and improvements all fall within the scope of claimed the utility model, the claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. a 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould, comprise punch, punch cooling water pipe, die, die cooling water pipe, cooling water recirculation system, hydraulic pamp and bosh, it is characterized in that, described punch inside is provided with punch cooling water pipe, die cooling water pipe is provided with in described die, the porch of described die cooling water pipe and punch cooling water pipe is communicated with hydraulic pamp, the exit of described die cooling water pipe and punch cooling water pipe is communicated with cooling water recirculation system, the outlet of described cooling water recirculation system is communicated with bosh, the entrance of described hydraulic pamp stretches into bosh inside.
2. a kind of 22MnB5 boron steel according to claim 1 U-shaped heat stamping and shaping cooling experiment mould, it is characterized in that, described punch cooling water pipe is distributed in inside the convex globoidal of punch, and described die cooling water pipe is distributed in inside the cancave cambered surface of die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520480822.4U CN204711008U (en) | 2015-06-27 | 2015-06-27 | A kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520480822.4U CN204711008U (en) | 2015-06-27 | 2015-06-27 | A kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould |
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| CN204711008U true CN204711008U (en) | 2015-10-21 |
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| CN201520480822.4U Expired - Fee Related CN204711008U (en) | 2015-06-27 | 2015-06-27 | A kind of 22MnB5 boron steel U-shaped heat stamping and shaping cooling experiment mould |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935722A (en) * | 2016-06-15 | 2016-09-14 | 张舒维 | Stamping die with self-cooling capability |
| CN105964799A (en) * | 2016-06-15 | 2016-09-28 | 张萍 | Intelligent stamping die adopting online water-making cooling |
| CN107052171A (en) * | 2017-04-28 | 2017-08-18 | 四川瑞丰锻造有限公司 | A kind of drop stamping production line cooling recirculation system |
| CN108580708A (en) * | 2017-11-29 | 2018-09-28 | 昆山邦泰汽车零部件制造有限公司 | A kind of novel punching die |
| CN109622706A (en) * | 2018-12-11 | 2019-04-16 | 吉林省正轩车架有限公司 | The process of auto parts is manufactured with middle thick boron alloyed steel plate heat stamping and shaping |
| WO2019104806A1 (en) * | 2017-11-29 | 2019-06-06 | 昆山一邦泰汽车零部件制造有限公司 | Intelligent water-cooled stamping die |
-
2015
- 2015-06-27 CN CN201520480822.4U patent/CN204711008U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935722A (en) * | 2016-06-15 | 2016-09-14 | 张舒维 | Stamping die with self-cooling capability |
| CN105964799A (en) * | 2016-06-15 | 2016-09-28 | 张萍 | Intelligent stamping die adopting online water-making cooling |
| CN107052171A (en) * | 2017-04-28 | 2017-08-18 | 四川瑞丰锻造有限公司 | A kind of drop stamping production line cooling recirculation system |
| CN108580708A (en) * | 2017-11-29 | 2018-09-28 | 昆山邦泰汽车零部件制造有限公司 | A kind of novel punching die |
| WO2019104806A1 (en) * | 2017-11-29 | 2019-06-06 | 昆山一邦泰汽车零部件制造有限公司 | Intelligent water-cooled stamping die |
| CN109622706A (en) * | 2018-12-11 | 2019-04-16 | 吉林省正轩车架有限公司 | The process of auto parts is manufactured with middle thick boron alloyed steel plate heat stamping and shaping |
| CN109622706B (en) * | 2018-12-11 | 2020-08-25 | 吉林省正轩车架有限公司 | Process method for manufacturing automobile parts by hot stamping and forming medium-thickness boron alloy steel plate |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151021 Termination date: 20160627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |