MANUFACTURING METHOD OF HOT FORMING MOLD USING SOLID PHASE DIFFUSION BONDING

• Main Author: PARK SANG GIL
• Format: Patent
• Language: English; Korean
• Published: 01.10.2021
• Subjects: CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; COMBINED OPERATIONS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; OTHER WORKING OF METAL; PERFORMING OPERATIONS; PUNCHING METAL; SOLDERING OR UNSOLDERING; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WELDING; WORKING BY LASER BEAM; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

The present invention relates to a method for manufacturing a hot forming mold using solid phase diffusion bonding, comprising: a step of preparing a material by dividing the material; a cooling channel processing step of processing cooling channels on a front surface and a rear surface, respectively, within a contour line by product design information input in advance to an NC processor and cooling channel design information; a solid phase diffusion bonding step; a mold material processing step of performing a process along the contour line by the product design information input in advance through the NC processor to manufacture a mold material; and a heat treatment step of heating the mold material at a predetermined temperature. In accordance with the present invention, a mold is manufactured using solid phase diffusion bonding which allows a plurality of sheets of divided materials to have the same physical property as a base material while cooling channels in a plurality of columns are conveniently and precisely formed in the mold along an edge of a forming surface with a predetermined depth and interval such that a size of the mold may be minimized and a cost may be reduced. In addition, water tightness between a plurality of cooling channels provided therein is excellent such that there is no worry about water leakage and a cooling efficiency may be increased such that quality of a formed product may be improved. Further, after precisely processing the cooling channel in each divided material in advance, the solid phase diffusion bonding is performed and then a forming surface at the outer circumference is processed such that all necessary processing of the cooling channel, such as straight line, curved line, vertical processing, etc. is possible and a mold which may control the cooling speed for every part by adjusting the thickness of the plurality of divided materials is easily manufactured. 본 발명은 고상확산접합을 이용한 열간 성형금형의 제조방법에 관한 것으로서, 분할하여 재료를 준비하는 단계, NC가공기에 미리 입력된 제품 설계 정보 및 냉각로 설계 정보에 의해 윤곽 라인 범위 내에서 전면 및 후면 각각에 냉각로를 가공하는 냉각로 가공 단계, 고상 확산 접합 단계, NC가공기를 통해 미리 입력된 제품 설계 정보에 의해 윤곽 라인을 따라 가공하여 금형제로 제조하는 금형제 가공 단계 및 금형제를 일정 온도로 가열하는 열 처리 단계를 포함하고, 본 발명에 따르면, 여러 장의 분할 재료를 모재와 동등한 물성을 갖도록 하는 고상 확산 접합을 이용하여 금형을 제작하되 금형 내부에 다수열의 냉각로를 성형면의 테두리를 따라 일정 깊이 및 간격으로 간편하면서도 정밀하게 만들 수 있어 금형의 사이즈 최소화 및 코스트 절감의 효과가 있으며, 내부에 구비되는 다수의 냉각로들간 수밀성이 뛰어나 누수 우려가 전연 없고, 냉각 효율을 높일 수 있어 성형 제품의 품질을 향상시킬 수 있으며, 각 분할 재료에 냉각로를 먼저 정밀 가공한 후 고상 확산 접합하고, 그 후 외주의 성형면을 가공하는 것이므로 냉각수로를 직선, 곡선, 수직가공 등 필요한 모든 가공이 가능하며, 다수의 분할 재료의 두께를 조절하면 부위별 냉각속도 조절이 가능한 금형 제작이 용이하다.