CN104707940A - Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing - Google Patents

Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing Download PDF

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Publication number
CN104707940A
CN104707940A CN201510115689.7A CN201510115689A CN104707940A CN 104707940 A CN104707940 A CN 104707940A CN 201510115689 A CN201510115689 A CN 201510115689A CN 104707940 A CN104707940 A CN 104707940A
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CN
China
Prior art keywords
core
sand core
sand
hot stamping
printing
Prior art date
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.)
Pending
Application number
CN201510115689.7A
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Chinese (zh)
Inventor
姚山
童强
张雪
李鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalian University of Technology
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Dalian University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dalian University of Technology filed Critical Dalian University of Technology
Priority to CN201510115689.7A priority Critical patent/CN104707940A/en
Publication of CN104707940A publication Critical patent/CN104707940A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/10Cores; Manufacture or installation of cores
    • B22C9/106Vented or reinforced cores

Abstract

The invention provides a method for reinforcing the strength of a sand core used for a car hot stamping mould and obtained by 3D (three-dimensional) printing. A coated sand mould and the sand core required for casting the stamping mould are printed by utilizing 3D printing equipment, and a high-precision casting blank of the hot stamping mould provided with a conformal cooling water channel can be obtained after pouring. But a printing material is coated sand, resin in the coated sand loses efficacy at about 600 DEG C, and the strength of the sand core obtained by 3D printing is reduced at a high temperature, so that the sand core needs to be subjected to strength reinforcement treatment. The invention provides a method for penetrating the sand core by a molybdenum wire or burying the molybdenum wire in the sand core and enabling the molybdenum wire to serve as a core bar, so that the heat resistance time of the sand core at the high temperature can be prolonged and the hot stamping mould in which the cooling water channel is completely unblocked can be obtained.

Description

The method of the tide of motorism diel sand core strength strengthening that a kind of 3D prints
Technical field
The present invention relates to the method for the strength reinforcing of the tide of motorism diel core that a kind of 3D prints, belong to the shaping manufacture field of hot stamping die.
Background technology
Hot stamping die, as the Core equipment in drop stamping production line, not only for being shaped, also will give part Cooling Quenching.Mould has cooling system could realize quenching, ensures the continuous coo1ing ability of mould.The actualizing technology of the design optimization of mould inside cooling water channel and the rear conformal water channel hot stamping die of optimization is the Focal point and difficult point that hot stamping die manufactures and designs.
3D prints, and is also rapid shaping, utilizes the data of three-dimensional CAD, by rapid forming equipment, material stacking is from level to level become physical prototypes.Rapid shaping technique has powerful modeling ability, utilizes rapid shaping technique can produce the entity of complicated shape structure.Use 3D to print and can obtain the shaping required sand mold of hot stamping die and core, but because the resin of printed material precoated sand can 600 DEG C of inefficacies, and the temperature of pour steel is more than 1500 DEG C, so need to print to 3D the core obtained to carry out strength reinforcing.
The shaping of the inner conformal cooling channel of hot stamping die is the difficult point that hot stamping die manufactures.
Summary of the invention
The present invention proposes the method for the strength reinforcing of the tide of motorism diel core that a kind of 3D prints, and solves the problem of film covered sand core elevated temperature strength deficiency when pouring into a mould.
A method for the strength reinforcing of the tide of motorism diel core that 3D prints, adopts 3D to print the core obtained with through hole or groove, then will penetrate or imbed the core strengthened after molybdenum filament serves as arbor in core.
The described core with through hole or groove is precoated sand core.
The fusing point of the described molybdenum filament penetrating or imbed, more than 2600 DEG C, can ensure not occur when pour steel to melt thus the elevated temperature strength of guarantee core.
Serve as arbor owing to penetrating or imbedding molybdenum filament in the core obtained after using the method strengthening, can improve the elevated temperature strength of precoated sand core, due to efficiency lost resin, intensity reduces and causes core to rupture when pouring into a mould to avoid core.Because the fusing point of molybdenum filament is more than 2600 DEG C, so when pouring molten steel, molybdenum filament can not melt, and can improve the elevated temperature strength of core, thus ensures that core can not rupture when pouring into a mould, and can obtain the hot stamping die that inner conformal cooling channel is completely unobstructed.
Accompanying drawing explanation
Fig. 1 is sand core structure schematic diagram.
Fig. 2 (a) stays a conformal through hole for strengthening sand mold in water channel sand cores.
Fig. 2 (b) stays a conformal groove for strengthening sand mold in water channel sand cores.
Detailed description of the invention
The detailed description of the invention of this invention is further illustrated below in conjunction with accompanying drawing and technical scheme.
Hot stamping die pour into a mould time, because inside exists water channel, so sand mold and core part will be divided into when somatotype.If Fig. 1 is core part.Because printed material is precoated sand, precoated sand core may rupture when pouring molten steel, so need to carry out intensive treatment to core.Through hole or the groove of a conformal will be all reserved in the single water channel of every root in core cad data before printing, if Fig. 2 (a) for reserve a conformal through hole in water channel sand cores, if Fig. 2 (b) for reserve a conformal groove in water channel sand cores.Then cad data is converted into 3D print data to print, print in the core obtained and leave through hole or groove, then molybdenum filament is imbedded in through hole or groove, the core of strength reinforcing can be obtained, the intensity of core at high temperature can be ensured, thus ensure finally to obtain the unobstructed of hot stamping die internal water channel.
The present invention prints to 3D the core obtained and carries out intensive treatment, ensures the elevated temperature strength that core pour into a mould at molten steel high temperature thus guarantee finally obtains the shaping of hot stamping die internal water channel and unobstructed.

Claims (3)

1. the method for strength reinforcing of tide of motorism diel core that prints of 3D, is characterized in that, adopt 3D to print the core obtained with through hole or groove, serves as arbor, the core that strengthened after penetrating or imbed molybdenum filament in through hole or groove.
2. method according to claim 1, is characterized in that: the described core with through hole or groove is precoated sand.
3. method according to claim 1 and 2, is characterized in that: described molybdenum filament fusing point is more than 2600 DEG C.
CN201510115689.7A 2015-03-17 2015-03-17 Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing Pending CN104707940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510115689.7A CN104707940A (en) 2015-03-17 2015-03-17 Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510115689.7A CN104707940A (en) 2015-03-17 2015-03-17 Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing

Publications (1)

Publication Number Publication Date
CN104707940A true CN104707940A (en) 2015-06-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510115689.7A Pending CN104707940A (en) 2015-03-17 2015-03-17 Method for reinforcing strength of sand core used for car hot stamping mould and obtained by 3D (three-dimensional) printing

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105328129A (en) * 2015-10-30 2016-02-17 宁夏共享模具有限公司 Reinforcing method for strength of sand core of 3D printing air cylinder cover
CN105689651A (en) * 2016-02-02 2016-06-22 宁夏共享模具有限公司 3D printing sand core for core assembly
CN106040987A (en) * 2016-07-19 2016-10-26 宁夏共享模具有限公司 External reinforcement system of 3D printing mold core
CN108296420A (en) * 2017-10-27 2018-07-20 柳州市柳晶科技股份有限公司 A kind of 3D printing precoated sand and preparation method thereof
CN108480566A (en) * 2018-03-26 2018-09-04 四川共享铸造有限公司 The method for posting of arbor in increasing material manufacturing core
CN108746510A (en) * 2018-05-15 2018-11-06 北京隆源自动成型系统有限公司 Mould manufacturing method with conformal cooling channel
CN109986724A (en) * 2019-05-07 2019-07-09 重庆大学 Increasing material manufacturing mold with type cooling water channel structure-function combining design technology method
CN110918885A (en) * 2019-12-24 2020-03-27 肇庆学院 Manufacturing method for reinforced 3D printer sand mold
CN111230049A (en) * 2020-02-28 2020-06-05 江苏徐工工程机械研究院有限公司 3D printing-based integral hydraulic multi-way valve sand core casting process

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105750A (en) * 1990-08-22 1992-04-07 Nissan Motor Co Ltd Method for molding green sand core
US20070235156A1 (en) * 2002-08-02 2007-10-11 Hildreth Manufacturing, Llc Method of forming a metal casting having a uniform side wall thickness
CN101987347A (en) * 2010-09-29 2011-03-23 西安交通大学 Manufacturing method of core for casting engine exhaust manifold
CN102069149A (en) * 2011-01-18 2011-05-25 重庆大学 Fiber and sand core reinforced thereby
CN103522026A (en) * 2013-09-24 2014-01-22 大连理工大学 Non-pre-buried type abnormal-shaped bent water channel hot-work die and manufacturing method of non-pre-buried type abnormal-shaped bent water channel hot-work die
CN203764900U (en) * 2014-04-22 2014-08-13 天津特精天机液压件铸造有限公司 Hydraulic valve casting sand core
CN103990761A (en) * 2014-05-29 2014-08-20 西安交通大学 Manufacturing method of hollow turbine blade provided with impact hole structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04105750A (en) * 1990-08-22 1992-04-07 Nissan Motor Co Ltd Method for molding green sand core
US20070235156A1 (en) * 2002-08-02 2007-10-11 Hildreth Manufacturing, Llc Method of forming a metal casting having a uniform side wall thickness
CN101987347A (en) * 2010-09-29 2011-03-23 西安交通大学 Manufacturing method of core for casting engine exhaust manifold
CN102069149A (en) * 2011-01-18 2011-05-25 重庆大学 Fiber and sand core reinforced thereby
CN103522026A (en) * 2013-09-24 2014-01-22 大连理工大学 Non-pre-buried type abnormal-shaped bent water channel hot-work die and manufacturing method of non-pre-buried type abnormal-shaped bent water channel hot-work die
CN203764900U (en) * 2014-04-22 2014-08-13 天津特精天机液压件铸造有限公司 Hydraulic valve casting sand core
CN103990761A (en) * 2014-05-29 2014-08-20 西安交通大学 Manufacturing method of hollow turbine blade provided with impact hole structure

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105328129A (en) * 2015-10-30 2016-02-17 宁夏共享模具有限公司 Reinforcing method for strength of sand core of 3D printing air cylinder cover
CN105689651A (en) * 2016-02-02 2016-06-22 宁夏共享模具有限公司 3D printing sand core for core assembly
CN105689651B (en) * 2016-02-02 2017-12-19 宁夏共享模具有限公司 One kind group core 3D printing core
CN106040987A (en) * 2016-07-19 2016-10-26 宁夏共享模具有限公司 External reinforcement system of 3D printing mold core
CN108296420A (en) * 2017-10-27 2018-07-20 柳州市柳晶科技股份有限公司 A kind of 3D printing precoated sand and preparation method thereof
CN108480566A (en) * 2018-03-26 2018-09-04 四川共享铸造有限公司 The method for posting of arbor in increasing material manufacturing core
CN108746510A (en) * 2018-05-15 2018-11-06 北京隆源自动成型系统有限公司 Mould manufacturing method with conformal cooling channel
CN109986724A (en) * 2019-05-07 2019-07-09 重庆大学 Increasing material manufacturing mold with type cooling water channel structure-function combining design technology method
CN109986724B (en) * 2019-05-07 2020-11-24 重庆大学 Structural function integrated design method for additive manufacturing mould conformal cooling water channel
CN110918885A (en) * 2019-12-24 2020-03-27 肇庆学院 Manufacturing method for reinforced 3D printer sand mold
CN111230049A (en) * 2020-02-28 2020-06-05 江苏徐工工程机械研究院有限公司 3D printing-based integral hydraulic multi-way valve sand core casting process

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Application publication date: 20150617