CN101486063B - Thermal punch forming mold - Google Patents

Thermal punch forming mold Download PDF

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Publication number
CN101486063B
CN101486063B CN200910066588XA CN200910066588A CN101486063B CN 101486063 B CN101486063 B CN 101486063B CN 200910066588X A CN200910066588X A CN 200910066588XA CN 200910066588 A CN200910066588 A CN 200910066588A CN 101486063 B CN101486063 B CN 101486063B
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CN
China
Prior art keywords
die
cooling
port plate
protruding
hot stamping
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN200910066588XA
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Chinese (zh)
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CN101486063A (en
Inventor
谷诤巍
朱超
徐虹
徐勇
张正林
张静
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Jilin University
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Jilin University
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Application filed by Jilin University filed Critical Jilin University
Priority to CN200910066588XA priority Critical patent/CN101486063B/en
Publication of CN101486063A publication Critical patent/CN101486063A/en
Application granted granted Critical
Publication of CN101486063B publication Critical patent/CN101486063B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention relates to a hot stamping forming die, and belongs to the field of hot stamping forming. The die comprises a convex die, a concave die, an upper port plate, a lower port plate and other main parts, wherein a series of cooling grooves are arranged inside the hot stamping forming die by being combined with the shape of a work surface of the die; corresponding lugs are arranged on the port plates; the convex die is combined with the port plates to form cavities which are taken as cooling pipelines; the port plates and both ends of a groove of the convex die form cavities which are connected with a water inlet and a water outlet respectively; and water flows in from the water inlet and is simultaneously supplied to various cooling pipelines through the cavities on the end parts, and the aim of cooling is achieved by heat exchange between the cooling water and the die. The hot stamping forming die makes cooling more uniform by controlling the distance between the cooling pipelines and the surface of the die, guarantees structural homogeneity of various parts of parts, improves the quality of the parts, and can solve the problem of difficult cooling of dies with complex surface shapes, perform anticorrosive treatment on the cooling pipelines, and reduce the requirements on die materials.

Description

A kind of hot stamping forming die
Technical field:
The present invention relates to a kind of hot stamping forming die, belong to technical field of hot stamping and forming.
Background technology:
Hot press-formed technology is a new technology that is specifically designed to the shaping high-strength steel plate stamping part, the back part that is shaped can obtain the above intensity of 1500MPa, and forming accuracy height, substantially there is not resilience, be used for automotive security spare or structural member, can improve the security performance of automobile, alleviate tare, be subjected to the common concern of industry in recent years.The principle of hot press-formed technology is that the boron alloy steel plate is heated to high temperature and is incubated a period of time, make its complete austenitizing, cooling then is shaped rapidly in hot-forming die, make sheet material be transformed into high-intensity martensitic structure by austenite, thus the workpiece that acquisition has high dimension precision and intensity.Because the shaping of sheet material and quenching are all finished in hot stamping forming die, so the design of hot stamping forming die is one of key of hot press-formed technology.Of paramount importance in the hot stamping forming die design is the design of cooling body, should guarantee cooling velocity 30 ℃/more than the s, guarantee that austenite changes martensitic structure fully into, guarantee again piece surface is evenly cooled off, make the part even tissue, avoid producing low intensity points, reduce residual thermal stress, guarantee the quality of final drip molding.
In present hot stamping die, mainly adopt in the internal drilling of mould punch-die as cooling pipe, external water circulation system forms the mode of cooling circuit, realizes the quick cooling to mould.This method can reach the desired cooldown rate of hot press-formed technology, but still exist significantly not enough, general automotive security spare or structural member surface configuration be more complicated all, and certain curvature often arranged, can only get out the restriction of straight hole in view of the processing method of boring, cause between cooling pipe and the punch-die surface distance not wait, must cause the inhomogeneous of cooling, influence the quality of final drip molding.Especially when die surface is complex-shaped, the mould piecemeal must be drilled through cooling pipe respectively, sometimes even need take in the processing method of both direction to boring, difficulty of processing is very big, has increased difficulty also for simultaneously the assembling of mould.And owing to offered cooling pipe in punch-die inside, very high for the rust quality requirement of mold materials, limited selecting for use of hot stamping forming die material.
Summary of the invention:
The invention provides a kind of hot stamping forming die, mainly is the cooling problem that solves the even and complex structure mould of hot stamping forming die inhomogeneous cooling.
Above-mentioned purpose of the present invention is achieved in that accompanying drawings is as follows:
A kind of hot stamping forming die, mainly form by protruding, die and upper and lower port plate, described protruding, the inner cooling groove 3 that is provided with of die, upper and lower port plate is provided with corresponding protruding 4, protruding, die and the combination of the upper and lower port plate formation cooling pipe that is assembled together, the projection 4 end places of described upper and lower port plate are provided with groove, and groove is provided with the entery and delivery port 6,7 that communicates with it.Form cooling circuit in punch (die) inside after the water flowing.Sectional dimension by guaranteeing cooling pipe and and die surface between distance reach the even cooling purpose of workpiece.
Described cooling groove 3 protruding, that die is interior keeps equating that vertical height of every cooling pipe should keep equal with distance protruding, the die working surface.
Adopt the sealing ring sealing in described protruding, die and the upper and lower port plate contact-making surface.
Cooling groove 3 on described protruding, the die and the projection on the upper and lower port plate 4 adopt trapezoid cross sections to cooperate.
When described cooling pipe adopted many, the cooling pipe that cooling pipe that punch and last port plate constitute and die and following port plate constitute was in staggered distribution, and entery and delivery port oppositely is provided with.
Compare with traditional hot stamping forming die, the present invention has plurality of advantages.
Major advantage of the present invention is to guarantee that cooling bath equates with the distance on mold work surface, cooling to die surface is more even, can effectively reduce residual thermal stress, avoids the generation of low intensity points, guarantee that the part structural constituent is even, thereby improve the quality of part.
The invention solves the problem that complex-shaped part is difficult to cool off, avoided the difficulty that to bring to assembling the mould piecemeal because of boring and to the influence of forming accuracy, the eddy current or the backflow of the cooling water that blind hole or intersection cause when having avoided boring simultaneously make current steady and smooth more.
Description of drawings:
Fig. 1. punch working surface schematic diagram;
Fig. 2. the punch schematic rear view;
Fig. 3. the port plate schematic diagram;
Fig. 4. punch cooperates sectional view with port plate.
Among the figure: 1. punch 2. port plates 3. cooling grooves 4. protruding 5. sealing rings, 6. water inlets, 7. delivery ports
The specific embodiment:
Further specify the content of the present invention and the specific embodiment thereof below in conjunction with the accompanying drawing illustrated embodiment.
Because protruding, die is identical with the structure of the cooling pipe of upper and lower port plate combination back formation, thus below only be the example explanation with the punch structure.
Consult Fig. 1,2,3, the present invention in conjunction with the shape of punch 1 working surface within it portion a series of cooling groove 3 is set, groove 3 keeps equating with punch 1 surface distance.Be provided with corresponding protrudingly 4 on port plate 2, height of projection after punch and port plate are combined, forms the cooling pipe that highly equates less than groove depth.Punch upper groove in the accompanying drawing illustrated embodiment is provided with 3, only be provided with a projection with it to the port plate that cooperates, the setting of projection 4 is to equate for the height that guarantees each bar cooling pipe, the longitudinal size that is cooling pipe equates, but each duct width is not necessarily identical, to guarantee that cooling evenly.Do not establish projection on the port plate of this figure punch grooves on two sides corresponding position, be because with the height of mold cools down pipeline as the distance between shallow slot and the port plate, can save mold materials so to greatest extent, the while can be reduced the difficulty of processing of port plate.The length of the bossing on the port plate is less than the length of punch upper groove, form cavity at two ends, link to each other with delivery port 7 with the water inlet 6 of port plate respectively, the entery and delivery port external water circulation system of flexible pipe, water flows into from water inlet, cavity while each cooling pipe of dispensing by the end is flowed out by opposite side again, reaches cooling purpose by the heat exchange between cooling water and the mould.For guaranteeing the sealing of cooling pipe, the groove 3 in projection on the port plate 24 and the punch all is designed to the trapezoid cross section, the two closely cooperates, and can assemble at low temperatures in case of necessity, utilizes the character of expanding with heat and contract with cold of material to reach close-fitting purpose.On port plate 2, be provided with sealing ring 5 simultaneously, can not reveal by contact-making surface to guarantee cooling water.Punch 1 can adopt the pin location with the fixed form of port plate 2, and screw connects.
The port plate projection that the present invention adopts, the design of punch recess sidewall trapezoid cross section, guaranteed closely cooperating of the two on the one hand, on the other hand, when mold work after a period of time, if wear and tear in the surface, the surface is carried out still can guaranteeing closely cooperating of the two after the adjusting, continue to use, the square-section then can't guarantee to closely cooperate, therefore, say in a sense, can prolong the service life of mould.In punch-die and plane that port plate cooperates, be provided with sealing ring, prevent that cooling water from leaking by contact-making surface.
Hot press-formed owing to need offer cooling pipe in mould, therefore the resistance to rust to mould has very high requirement.Owing to can carry out the rust-proofing processing to the cooling pipe wall in advance, therefore reduced selection among the present invention to mold materials.Port plate is contact workpiece not, and temperature influence is less, and is therefore less demanding to its thermodynamic property, only need consider its intensity and resistance to rust when selecting material.
When adopting the design of this mould structure for the mould of the workpiece of longer dimension, can adopt the method that a plurality of cooling circuits are set in punch (die), can reduce to improve cooling effectiveness, can improve the mechanical strength of mould again because of the long influence of mould to cooling effect.In the Mould design of a plurality of cooling circuits, be provided with between the cooling zone of protruding, die otherwise consistent, the interior sidewall of separating between each cooling zone of protruding, die is interleaved, avoid producing the cooling blind area, intake-outlet on the punch is taked reverse design with die respectively, by reverse flow protruding, the die current are compensated the influence of cooling water temperature difference to die surface, make cooling more even.In actual production, can increase and decrease the number of intake-outlet as required.
The situation of many cooling baths mainly is the restriction that is subjected to the die surface shape, and general mould has several projectioies and groove, so will several cooling pipes of relative set.If the width of projection and groove is excessive, then to consider in a projection or groove, to be provided with two or many cooling pipes, to guarantee the mechanical strength of mould, in this case, pipeline protruding, die should be in staggered distribution, and avoids producing the cooling blind area.
The structure of hot stamping forming die of the present invention has solved current hot-forming die and has been difficult to the problem that evenly cooling and surface configuration complicated die cooling pipe are difficult to offer, and has reduced the requirement to the mold materials resistance to rust, is of great immediate significance.

Claims (2)

1. hot stamping forming die, mainly form by protruding, die and upper and lower port plate, it is characterized in that described protruding, the inner cooling groove (3) that is provided with of die, upper and lower port plate is provided with corresponding projection (4), protruding, die and the combination of the upper and lower port plate formation cooling pipe that is assembled together, the projection of described upper and lower port plate (4) end place is provided with groove, and groove is provided with the entery and delivery port (6,7) that communicates with it; Described cooling groove (3) protruding, that die is interior keeps equating that vertical height of every cooling pipe should keep equal with distance protruding, the die working surface; Adopt the sealing ring sealing in described protruding, die and the upper and lower port plate contact-making surface.
2. a kind of hot stamping forming die according to claim 1, when it is characterized in that described cooling pipe adopts many, the cooling pipe that cooling pipe that punch and last port plate constitute and die and following port plate constitute is in staggered distribution, and entery and delivery port oppositely is provided with.
CN200910066588XA 2009-03-04 2009-03-04 Thermal punch forming mold Expired - Fee Related CN101486063B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910066588XA CN101486063B (en) 2009-03-04 2009-03-04 Thermal punch forming mold

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910066588XA CN101486063B (en) 2009-03-04 2009-03-04 Thermal punch forming mold

Publications (2)

Publication Number Publication Date
CN101486063A CN101486063A (en) 2009-07-22
CN101486063B true CN101486063B (en) 2011-05-18

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101716629B (en) * 2009-11-24 2012-06-13 机械科学研究总院先进制造技术研究中心 Hot stamping die of integrated cooling pipeline
DE102010011188A1 (en) * 2010-03-11 2012-01-12 Thyssenkrupp Sofedit S.A.S Mold with branched within tool parts cooling channel holes
CN102744328A (en) * 2012-07-16 2012-10-24 天津职业技术师范大学 Method for manufacturing high strength steel plate hot stamping die
JP5664810B1 (en) * 2013-06-27 2015-02-04 Jfeスチール株式会社 Press forming method and apparatus
CN104275415B (en) * 2014-10-24 2016-08-17 东莞市豪斯特热冲压技术有限公司 Drop stamping cooling water channel structure

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Granted publication date: 20110518

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