CN103386444B - The direct-cooled technique of cooling fluid based on the hot-forming die of boron steel steel plate and device - Google Patents
The direct-cooled technique of cooling fluid based on the hot-forming die of boron steel steel plate and device Download PDFInfo
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- CN103386444B CN103386444B CN201310314927.8A CN201310314927A CN103386444B CN 103386444 B CN103386444 B CN 103386444B CN 201310314927 A CN201310314927 A CN 201310314927A CN 103386444 B CN103386444 B CN 103386444B
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Abstract
A kind of direct-cooled technique of cooling fluid of the hot-forming die based on boron steel steel plate of heat treatment plastic forming technology field and device, this device comprises: upper die and lower die, be arranged at upper die and lower die and contact the semi-open cooling fluid passage on surface, and the cooling fluid feed system that forcing press provides for mould.Wherein: upper die and lower die are by several plane domains, salient angle region and concave domain composition, and semi-open cooling fluid passage is arranged in the plane domain of counterdie and the plane domain of concave domain and patrix and concave domain respectively.The present invention both can make workpiece be shaped smoothly by mould punching at shaping stage, can realize cooling fluid again directly cool workpiece at pressurize cooling stage.
Description
Technical field
What the present invention relates to is a kind of method and apparatus of heat treatment plastic forming technology field, specifically a kind of direct-cooled technique of cooling fluid of the hot-forming die based on boron steel steel plate and device.
Background technology
Boron steel steel plate is as a series of hot forming steel plate, and production technology as shown in Figure 1, is divided into shaping and 2 stages of quench cooled, wherein: shaping stage needs at high temperature to be shaped by mould punching; The quench cooled stage needs by controlling certain cooling velocity, and the transformation from austenite microstructure to martensite microstructure can occur, obtain high intensity and hardness: be different according to boron steel kind, its intensity can reach 500 ~ 2000MPa.After common hot forming, intensity reaches the boron steel chemical composition of 1500MPa and is:
| C | Si | Mn | P | S | Cr | B | |
| min | 0.20 | 0.20 | 1.00 | - | - | 0.15 | 0.0015 |
| max | 0.25 | 0.35 | 1.30 | 0.025 | 0.015 | 0.25 | 0.0050 |
The die quenching type of cooling common at present arranges cooling water as illustrated in figure 1 c at mould inside.Namely the boron steel workpiece under high temperature, is entered pressurize cooling stage, first transfers heat to mould steel after being shaped by mould punching, and mould steel transfers heat to the cooling water be arranged in wherein again, thus realizes the cooling to boron steel workpiece; The cooling effectiveness of this mode workpiece, not only depends on the arrangement of cooling water channel, is limited to the heat transfer efficiency of mould steel simultaneously, belongs to the hot forming processing technology that cooling fluid cools workpiece indirectly.
Through finding the retrieval of prior art, Chinese patent literature CN102939221A, publication date 2013-02-20, disclose the manufacture method of a kind of bumper bottom reinforcing material, it comprises: cut off by specific length the cut-out step that hardenability element adds steel pipe; With the heat treatment step that forming temperature heats the steel pipe cut off; By utilizing extrusion die, the hot-forming hot-forming step being shaped to the shape of the horizontal part possessing planar portions in both sides is carried out to the steel pipe of above-mentioned heating; And the cooling step of cooling is fast carried out to shaping horizontal part under the state of closed above-mentioned extrusion die.But this technology enters pressurize cooling stage after being shaped by mould punching, first transfers heat to mould steel, mould steel transfers heat to the cooling water be arranged in wherein again, thus realizes the cooling to boron steel workpiece; The cooling effectiveness of this mode workpiece, not only depends on the arrangement of cooling water channel, is limited to the heat transfer efficiency of mould steel simultaneously, belongs to the hot forming processing technology that cooling fluid cools workpiece indirectly.
Summary of the invention
The present invention is directed to prior art above shortcomings, a kind of direct-cooled technique of cooling fluid and device of the hot-forming die based on boron steel steel plate are proposed, both by mould punching, workpiece can be shaped smoothly at shaping stage, and cooling fluid can be realized at pressurize cooling stage again and directly cool workpiece.
The present invention is achieved by the following technical solutions:
The present invention relates to a kind of direct-cooled technique of cooling fluid of the hot-forming die based on boron steel steel plate, comprise the following steps:
The first step, by the geometric properties of product section to be formed except straightway each circular arc portion be salient angle region and concave domain, and correspondence position in hot forming tool be set be:
I. the profile in the salient angle region of hot forming tool is set to shape identical with product design to be formed;
Ii. the surface of the concave domain of hot forming tool arranges some the semi-open cooling fluid passages be interconnected, and the head end of this semi-open cooling fluid passage and end are connected to form coolant circuit with the coolant connection of hot forming tool respectively.
Second step, shaping stage: boron steel steel plate is heated to after austenitizing in heater, be placed in hot forming tool and form process by forcing press effect in the scope of 450 ~ 850 DEG C.
The temperature of described austenitizing is 850 ~ 950 DEG C.
Described connection refers to: the semi-open cooling fluid passage of the part of the upper die and part of the lower die that are arranged in hot forming tool is communicated with respectively and forms one or several entrance and exit respectively, is connected with entrance with the outlet of forcing press.
3rd step, pressurize cooling stage: in semi-open cooling fluid passage, input cooling fluid while keeping hot forming tool closed, make the coolant flow in semi-open cooling fluid passage and directly to cool workpiece.
Described surface arranges and refers to: according to the size of the arc radius of the concave domain of product mold to be formed, biased 0 ~ L-3(mm to the direction that arc radius reduces) and grooved section width is set.Wherein: L is re-entrant angle arc length.
The present invention relates to the device realizing above-mentioned technique, comprising: upper die and lower die, be arranged at upper die and lower die contact surface semi-open cooling fluid passage and forcing press be mould be equipped with cooling fluid feed system.Wherein: upper die and lower die are by the concave domain composition of several plane domains, salient angle region and correspondence, and described semi-open cooling fluid passage is arranged in the plane domain of counterdie and the plane domain of concave domain and patrix and concave domain respectively.
Described device preferably includes heater, work handling device and forcing press further, to realize further automated production.
Technique effect
Compared with prior art, advantage of the present invention comprises:
1) core of the present invention is: making full use of component shaping is this rule that mould salient angle is shaped, re-entrant angle does not play shaping effect, coolant channels is arranged at mould concave domain, neither affect the shaping of workpiece, can realize again cooling fluid to contact with the direct of workpiece, thus realization is shaped, cooling once completes.
2) component shaping and the direct Cooling Quenching of cooling fluid are integrated into a station realization by the present invention.In prior art, there is the technique using cooling water, oil, low temperature compressed air directly to cool boron steel steel plate workpiece, but after component shaping, a station must be increased and be equipped with different operating modes, frock and equipment to realize beyond forming station.
3) cooling fluid directly cools workpiece, and cooling effectiveness is high.In prior art, have and use the mould steel of internal placement cooling water indirectly to cool workpiece, component shaping can be realized and Cooling Quenching completes at a station, but cooling water directly can not cool workpiece, heat is conducted by mould steel, the efficiency of cooling is not the efficiency of supply depending on cooling fluid usually, but depends on the heat transfer efficiency of mould steel.Use this technique, effectively can improve cooling effectiveness.
4) the present invention's indirect cooling technology that can indirectly cool workpiece with existing mold steel with the use of.On a specific workpiece, several situation is difficult to realize Homogeneous cooling below:
I) product geometric properties is complicated, and indirect cooling water road is difficult to even arrangement, even occurs cooling dead angle;
Ii) product is clad steel plate (Patch-work), is namely two-layered steel plates in a certain region, is linked together by spot welding.This region is owing to being double-layer plate, and the method cooling effectiveness of the indirect cooling of tradition is difficult to accomplish consistent with other regions;
Iii) product is laser assembly solder plate (TailoredWeldedBlank), and plate itself is formed by the plate with laser welding of two or more different-thickness.Zones of different due to thickness different, the method cooling effectiveness of tradition cooling is indirectly difficult to accomplish consistent with other regions;
Iv) product is do not wait material slab (TailoredRolledBlank), and plate itself is rolled into the steel plate of two or more different-thickness by special cold-rolling process.Zones of different due to thickness different, the method cooling effectiveness of tradition cooling is indirectly difficult to accomplish consistent with other regions;
In above situation, according to actual needs, zones of different can unrestricted choice cooling fluid directly cool or directly cooling cooperation cooling indirectly, mutually supplements, reaches Homogeneous cooling, the object of simultaneously enhancing productivity.
Accompanying drawing explanation
Fig. 1 is existing hot forming techniques schematic diagram;
In figure: a is for adding post forming; B is by pressurize quench cooled; C is die quenching cooling die schematic diagram.
Fig. 2 is mould structure sectional schematic diagram of the present invention;
In figure: patrix 1, counterdie 2, product workpiece 3, concave domain 4, salient angle region 5, semi-open cooling fluid passage 6, plane domain 7, closed cooling fluid passage 8.
Fig. 3 is embodiment mould structure schematic diagram.
Fig. 4 is semi-open cooling fluid passage schematic diagram in embodiment.
Detailed description of the invention
Elaborate to embodiments of the invention below, the present embodiment is implemented under premised on technical solution of the present invention, give detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 2, the present embodiment comprises: patrix 1, counterdie 2 and be arranged at patrix 1 and counterdie 2 and contact the semi-open cooling fluid passage 6 on surface.Cooling passage is unified is D9 semi-circular recesses, and groove center spacing is unified is 12mm.Forcing press is 400T thermoforming special pressure machine, and provide cooling fluid to be the cooling water that initial temperature controls at 15 ~ 20 DEG C, flow set is 120L/Min.
Workpiece is the thick boron steel steel plate of 1.5mm, length 1000mm, cross-sectional width 150mm, and corner fillet is unified is R9, drafting angle 60 DEG C, i.e. arc length 9.42mm.
According to the feature of product workpiece 6, define respective salient angle 2 and re-entrant angle 3, and relevant range 4.In hot forming process, due to the existence of salient angle 2, can ensure that workpiece is shaped according to product design; Pressurize cooling stage, series cooling fluid passage 3,4 supply cooling fluid of arrangement, directly cools workpiece.
As shown in Figure 3, the direct-cooled method of the present invention and traditional indirect cooling method can be with the use of, namely, while the surface of hot forming tool arranges semi-open cooling fluid passage, arrange in the inside of hot forming tool and close cooling fluid passage 8 to improve the cooling effect of mould further for difformity object.
Above-mentioned building mortion carries out concrete heat treatment by following steps:
1, boron steel plate is got the raw materials ready
2, in heater, 900 DEG C are heated to by plate complete austenitizing
3, within 6 seconds, boron steel plate is placed in mould
4, press initial openings height 800mm, and, shaping closed with the speed of 300mm/s
5, forcing press is kept closed, and maintains the pressure of 400T, injects cooling fluid with 120L/Min simultaneously, directly carries out cooling fast 5 seconds to workpiece, and obtaining the final intensity needed is the martensitic structure of 1500MPa.
Embodiment 2
As shown in Figure 2, the present embodiment comprises: patrix 1, counterdie 2 and be arranged at patrix 1 and counterdie 2 and contact the semi-open cooling fluid passage 6 on surface.Cooling passage is unified is D6 semi-circular recesses, and groove center spacing is unified is 12mm.Forcing press is 150T thermoforming special pressure machine, and provide cooling fluid to be the cooling water that initial temperature controls at 15 ~ 20 DEG C, flow set is 50L/Min.
Workpiece is the thick boron steel steel plate of 1.5mm, length 300mm, cross-sectional width 150mm, and corner fillet is unified is R6, drafting angle 60 DEG C, i.e. arc length 6.28mm.
According to the feature of product workpiece 6, define respective salient angle 2 and re-entrant angle 3, and relevant range 4.In hot forming process, due to the existence of salient angle 2, can ensure that workpiece is shaped according to product design; Pressurize cooling stage, series cooling fluid passage 3,4 supply cooling fluid of arrangement, directly cools workpiece.
As shown in Figure 4, cooling fluid path flow needed for satisfied calculating, semi-open cooling fluid passage can have different cross sections as required, both can be circular groove structure (Fig. 4 a), also can be inverted trapezoidal (Fig. 4 b) or rectangular recess (Fig. 4 c) structure, can also be circular arc and rectangle or trapezoidal combining structure (Fig. 4 d), do appropriateness adjustment according to the change of product, the needs of cooling, the convenience etc. of processing and manufacturing completely.
Above-mentioned building mortion carries out concrete heat treatment by following steps:
1, boron steel plate is got the raw materials ready
2, in heater, 900 DEG C are heated to by plate complete austenitizing
3, within 6 seconds, boron steel plate is placed in mould
4, press initial openings height 600mm, and, shaping closed with the speed of 300mm/s
5, forcing press is kept closed, and maintains the pressure of 150T, injects cooling fluid with 50L/Min simultaneously, directly carries out cooling fast 5 seconds to workpiece, and obtaining the final intensity needed is the martensitic structure of 1500MPa.
Embodiment 3
As shown in Figure 2, the present embodiment comprises: patrix 1, counterdie 2 and be arranged at patrix 1 and counterdie 2 and contact the semi-open cooling fluid passage 6 on surface.Cooling passage is unified for 3mm is wide, the dark rectangular recess of 9mm, and groove center spacing is unified is 12mm.Forcing press is 400T thermoforming special pressure machine, and provide cooling fluid to be the cooling water that initial temperature controls at 15 ~ 20 DEG C, flow set is 120L/Min.
Workpiece is the thick boron steel steel plate of 2.5mm, length 1000mm, cross-sectional width 150mm, and corner fillet is unified is R6, drafting angle 30 DEG C, i.e. arc length 3.14mm.
According to the feature of product workpiece 6, define respective salient angle 2 and re-entrant angle 3, and relevant range 4.In hot forming process, due to the existence of salient angle 2, can ensure that workpiece is shaped according to product design; Pressurize cooling stage, series cooling fluid passage 3,4 supply cooling fluid of arrangement, directly cools workpiece.
Above-mentioned building mortion carries out concrete heat treatment by following steps:
1, boron steel plate is got the raw materials ready
2, in heater, 900 DEG C are heated to by plate complete austenitizing
3, within 6 seconds, boron steel plate is placed in mould
4, press initial openings height 600mm, and, shaping closed with the speed of 300mm/s
5, forcing press is kept closed, and maintains the pressure of 400T, injects cooling fluid with 120L/Min simultaneously, directly carries out cooling fast 5 seconds to workpiece, and obtaining the final intensity needed is the martensitic structure of 1500MPa.
Claims (6)
1., based on the direct-cooled technique of cooling fluid of the hot forming tool of boron steel steel plate, comprise the following steps:
The first step, by the geometric properties of product section to be formed except straightway each circular arc portion be salient angle region and concave domain, and correspondence position in hot forming tool be set be:
I. the profile in the salient angle region of hot forming tool is set to the shape of mating completely with product design to be formed;
Ii. the surface of the concave domain of hot forming tool arranges some the semi-open cooling fluid passages be interconnected, and the head end of this semi-open cooling fluid passage and end are connected to form coolant circuit with the coolant connection of hot forming tool respectively;
Second step, shaping stage: boron steel steel plate is heated to after austenitizing in heater, be placed in hot forming tool and form process by forcing press effect in the scope of 450 ~ 850 DEG C;
3rd step, pressurize cooling stage: in semi-open cooling fluid passage, input cooling fluid while keeping hot forming tool closed, make the coolant flow in semi-open cooling fluid passage and directly to cool workpiece;
Described connection refers to: the semi-open cooling fluid passage of the part of the upper die and part of the lower die that are arranged in hot forming tool is communicated with respectively and forms one or several entrance and exit respectively, is connected with entrance with the outlet of forcing press;
The cooling velocity of described cooling fluid to workpiece is more than or equal to 50 DEG C/sec, and cooling fluid initial temperature is between 5 ~ 45 DEG C.
2. technique according to claim 1, is characterized in that, the temperature of described austenitizing is 850 ~ 950 DEG C.
3. technique according to claim 1, it is characterized in that, described surface arranges and refers to: according to the size of the arc radius of the concave domain of product mold to be formed, and biased 0 ~ (L-3) mm to the direction that arc radius reduces also arranges grooved section width, wherein: L is re-entrant angle arc length.
4. one kind realizes the device of arbitrary above-mentioned technique in claim 1-3, it is characterized in that, device comprises: heater, work handling device, forcing press, upper die and lower die, be arranged at upper die and lower die contact surface semi-open cooling fluid passage, and the cooling fluid feed system that forcing press provides for mould, wherein: upper die and lower die are by the concave domain composition of several plane domains, salient angle region and correspondence, and described semi-open cooling fluid passage is arranged in the plane domain of counterdie and the plane domain of concave domain and patrix and concave domain respectively.
5. device according to claim 4, is characterized in that, the inside of described hot forming tool is provided with closes cooling fluid passage.
6. device according to claim 4, is characterized in that, the cross section of described semi-open cooling fluid passage is circular groove structure, inverted trapezoidal groove structure, rectangular recess structure or its combination.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102016217512B4 (en) * | 2016-09-14 | 2023-08-03 | Volkswagen Aktiengesellschaft | Hot forming tool for hot forming a sheet metal component |
| CN109433924B (en) * | 2018-11-28 | 2020-11-03 | 大连理工大学 | Die for realizing rapid forming and quenching in die |
| CN112453096B (en) * | 2020-10-10 | 2023-03-24 | 重庆至信实业集团有限公司 | Processing technology and equipment for sheet with different thicknesses |
| CN113909382B (en) * | 2021-08-31 | 2022-08-09 | 盐城诺焱科技有限公司 | Intelligent hardware compression mold suitable for high-end equipment manufacturing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101288889A (en) * | 2007-04-18 | 2008-10-22 | 上海大众汽车有限公司 | Ultra-high strength steel hot stamping forming die |
| CN201231286Y (en) * | 2008-07-31 | 2009-05-06 | 钢铁研究总院 | Baby fixation device for imaging department |
| EP2175041A1 (en) * | 2008-10-09 | 2010-04-14 | C.R.F. Società Consortile per Azioni | Method of hot forming metal plates |
| CN202640756U (en) * | 2012-05-18 | 2013-01-02 | 沧州市鑫宜达钢管集团股份有限公司 | Hot forming die |
| CN102939221A (en) * | 2010-02-22 | 2013-02-20 | 现代Hysco株式会社 | Bumper lower stiffener with improved performance using ultra high strength steel pipe and manufacturing method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005152969A (en) * | 2003-11-27 | 2005-06-16 | Nippon Steel Corp | Method of fabricating hot press |
| DE102009050533A1 (en) * | 2009-10-23 | 2011-04-28 | Thyssenkrupp Sofedit S.A.S | Method and hot forming plant for producing a hardened, hot formed workpiece |
| JP5679057B2 (en) * | 2011-06-29 | 2015-03-04 | トヨタ自動車株式会社 | Hot press equipment |
-
2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101288889A (en) * | 2007-04-18 | 2008-10-22 | 上海大众汽车有限公司 | Ultra-high strength steel hot stamping forming die |
| CN201231286Y (en) * | 2008-07-31 | 2009-05-06 | 钢铁研究总院 | Baby fixation device for imaging department |
| EP2175041A1 (en) * | 2008-10-09 | 2010-04-14 | C.R.F. Società Consortile per Azioni | Method of hot forming metal plates |
| CN102939221A (en) * | 2010-02-22 | 2013-02-20 | 现代Hysco株式会社 | Bumper lower stiffener with improved performance using ultra high strength steel pipe and manufacturing method thereof |
| CN202640756U (en) * | 2012-05-18 | 2013-01-02 | 沧州市鑫宜达钢管集团股份有限公司 | Hot forming die |
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