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公开(公告)号：KR1020100137698A
公开(公告)日：2010-12-31
申请号：KR1020090055870
申请日：2009-06-23
Applicant: 한국과학기술원
Abstract: PURPOSE: A method for measuring the inside surface roughness for a mold is provided to simply measure the inside surface roughness for a mold using the setting-up of a material and the load and distance of a tip from a back extrusion post-forming product. CONSTITUTION: A method for measuring the inside surface roughness for a mold is as follows. A material having the diameter smaller than the diameter of a cavity(12) is supplied the cavity of a mold(10). The material is set up and back-extruded using punch(30) having the diameter smaller than the diameter of material. The tip distance of moldings(4) shaped with the back extrusion of material is measured.
Abstract translation: 目的：提供一种用于测量模具的内表面粗糙度的方法，以简单地测量模具的内表面粗糙度，其中使用材料的安装以及尖端与后挤压后成型产品的负载和距离。 构成：用于测量模具的内表面粗糙度的方法如下。 具有小于空腔（12）的直径的直径的材料被供给模具（10）的空腔。 使用具有小于材料直径的直径的冲头（30）将材料设置和反向挤出。 测量用材料的后挤压成形的模制品（4）的尖端距离。
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12.发明公开
公开(公告)号：KR1020090071780A
公开(公告)日：2009-07-02
申请号：KR1020070139669
申请日：2007-12-28
Applicant: 한국과학기술원
CPC classification number: G01N19/02 , B21J5/02 , G01N2203/0025 , G01N2203/0033
Abstract: A tip testing device, a measuring method of shear friction factors using the tip testing device and an estimating method for lubricant characteristics using the tip testing device are provided to reduce manufacturing cost by accurately producing shear friction factors and predicting processes and performing net-shape forming. A tip testing device comprises: a mold(140) in which a mold hole(145) for an extrusion member(120) is formed; a punch which is inserted to a center like the mold hole and pressing the extrusion member; an auxiliary mold(130) which is inserted into the mold hole in order to face the punch and supporting the extrusion member; and a centering unit(150) of the cylindrical shape inserted into the mold hole. The centering unit arranges the extrusion member in the center like the mold hole. The extrusion member is inserted into the mold hole with being inserted into the centering unit. The centering unit has a centering unit hole(155) in which the rod is inserted.
Abstract translation: 提供尖端测试装置，使用尖端测试装置的剪切摩擦系数的测量方法和使用尖端测试装置的润滑剂特性的估计方法，以通过精确地产生剪切摩擦因数和预测过程并执行网状成形来降低制造成本 。 尖端测试装置包括：模具（140），其中形成有用于挤压构件（120）的模具孔（145）; 冲头，其插入到模具孔的中心并按压挤压构件; 辅助模具（130），其插入到模具孔中以面对冲头并支撑挤压构件; 以及插入到模具孔中的圆柱形的定心单元（150）。 定心单元将挤压构件布置在模具孔的中心。 挤出构件插入到模具孔中，并插入到定心单元中。 定心单元具有插入杆的定心单元孔（155）。
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公开(公告)号：KR100374507B1
公开(公告)日：2003-03-04
申请号：KR1020000017865
申请日：2000-04-06
Applicant: 한국과학기술원
IPC: G01N19/02
Abstract: 본 발명은 부피성형 가공시에 압출소재와 금형 사이에 발생하는 전단마찰인자를 측정하는 방법에 있어서, 후방압출을 이용하여 전단마찰인자를 보다 쉽게 측정할 수 있는 측정방법을 제공하는 데 그 목적이 있다.
본 발명에 따르면, 후방압출로서 성형제품을 제작하기 위해 압출소재(30)를 펀치(21)로 가압함에 있어 발생하는 마찰인자를 측정하는 방법에 있어서, 상기 압출소재(30)를 성형다이(11, 13)의 내부에 위치시키고 하중을 가해 성형제품을 제작하는 단계와, 성형제품의 외측면으로부터 상기 성형제품의 후방압출방향으로의 끝점(33)까지의 수직거리(d)를 측정하는 단계와, 상기 측정된 수직거리(d)를 이용하여 마찰인자를 계산하는 단계를 포함하는 마찰인자 측정방법이 제공된다.
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