• 제목/요약/키워드: tool orientation

검색결과 260건 처리시간 0.034초

역공학 기반 5축 신발 러핑용 CAM 시스템 개발 (Development of CAM system for 5-axis automatic roughing machine Based on Reverse Engineering)

  • 김화영;손성민;안중환;강동배
    • 한국정밀공학회지
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    • 제22권7호
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    • pp.122-129
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    • 2005
  • Shoe with leather upper such as safety and golf shoe requires a roughing process where the upper is roughed fur helping outsole to be cemented well. It is an important and basic process for production of leather shoe but is not automated yet. Thus, there are problems that the defect rate is high and the quality of roughed surface is not uniform. In order to solve such problems, the interest in automation of roughing process is being increased and this paper introduces CAM system for 5-axis automatic roughing machine as one part of automation of roughing process. The CAM system developed interpolates a B-spline curve using points measured from the Roughing Path Measurement System. The B-spline curve is used to generate the tool path and orientation data fer a roughing tool which has not only stiffness but also flexibility to rough the inclined surface efficiently. For productivity, the upper of shoe is machined by side of the roughing tool and tool offset is applied to the roughing tool for machining of inclined surface. The generated NC code was applied to 5-axis polishing machine for the test. The upper of shoe was roughed well along the roughing path data from CAM and the roughed surface was proper fur cementing of the outsole.

휨방지를 위한 CAE와 역보정을 이용한 Door Module PNL설계에 관한 연구 (A Study on the Design of Door Module PNL Using CAE and Inverse Compensation for Warpage)

  • 김두태;한성렬
    • Design & Manufacturing
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    • 제12권2호
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    • pp.27-33
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    • 2018
  • Korea's automobile industry, which has grown rapidly to become the world's fifth-largest automobile producer, To cope with environmental pollution and energy problems in order to prevail competitive edge in global market We are investing a lot of research personnel and costs. Among them, for realizing alternative light weight It is a part of the automobile module system that has achieved the technological development before the breakthrough in the injection molding process in the press process. Door module PNL was the subject of research. The door module PNL is expected to cause warpage before the mold production due to the thin and flat product characteristics and fiber orientation characteristic of the material. In this paper, CAE analysis and reverse correction tool Design. CAE analysis to obtain the results of weld line position, bending position and deformation value Through the correction tool, think3, the original product was modified before the mold production to improve the completeness of the parts. In fiber orientation, the position and size of the cooling channel in the mold, the position and size of the gate, Temperature, pressure, time, and work environment. Compared with the result of CAE analysis, the product that was reverse-corrected by Think3 was manufactured, and injection molding was performed. Injection molding products were tested 24 hours later. 3.5 mm to 7.0 mm, and under the fixed condition, the deviation was from 1.1 mm to 1.5 mm. Unlike the CAE analysis, the deviation of the actual injection pressure and the cooling temperature, the fiber orientation of the material, In order to solve this problem, it is necessary to compare the injection conditions with the database, I knew I had to catch the standard.

암환자를 위한 호스피스 케어에 관한 탐색적 연구 (An Exploratory Study of Hospice Care to Patients with Advanced Cancer)

  • 박혜자
    • 대한간호
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    • 제28권3호
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    • pp.52-67
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    • 1989
  • True nursing care means total nursing care which includes physical, emotional and spiritual care. The modern nursing care has tendency to focus toward physical care and needs attention toward emotional and spiritual care. The total nursing care is mandatory for patients with terminal cancer and for this purpose, hospice care became emerged. Hospice case originated from the place or shelter for the travellers to Jerusalem in medieval stage. However, the meaning of modem hospice care became changed to total nursing care for dying patients. Modern hospice care has been developed in England, and spreaded to U.S.A. and Canada for the patients with terminal cancer. Nowaday, it became a part of nursing care and the concept of hospice care extended to the palliative care of the cancer patients. Recently, it was introduced to Korea and received attention as model of total nursing care. This study was attempted to assess the efficacy of hospice care. The purpose of this study was to prove a difference in terms of physical, emotional a d spiritual aspect between the group who received hospice care and who didn't receive hospice care. The subject for this study were 113 patients with advanced cancer who were hospitalized in the S different hospitals. 67 patients received hospice care in 4 different hospitals, and 46 patients didn't receive hospice care in another 4 different hospitals. The method of this study was the questionaire which was made through the descriptive study. The descriptive study was made by individual contact with 102 patients cf advanced cancer for 9 months period. The measurement tool for questionaire was made by author through the descriptive study, and included the personal religious orientation obtained from chung(originated R. Fleck) and 5 emotional stages before dying from Kubler Ross. The content ol questionaire consisted in 67 items which included 11 for general characteristics, 10 for related condition with cancer, 13 for wishes far physical therapy, 13 for emotional reactions and 20 for personal religious orientation. Data for this study was collected from Aug. 25 to Oct. 6 by author and 4 other nurse's who received education and training by author for the collection of data. The collected data were ana lysed using descriptive statistics, $X^2-test$, t-test and pearson correlation coefficient. Results of the study were as follows: "H.C Group" means the group of patient with cancer who received hospice care. "Non H.C Group" means the group of patient with cancer who did not receive hospice care. 1. There is a difference between H.C Group and Non H.C Group in term of the number of physical symptoms, subjective degree of pain sensation and pain control, subjective beliefs in physical cure, emotional reaction, help of present emotional and spiritual care from other personal, needs of emotional and spiritual care in future, selection of treatment method by patients and personal religious orientation. 2. The comparison of H.C Group and Non H.C Group 1) There is no difference in wishes for physical therapy between two groups(p=.522). Among Non H.C Group, a group, who didn't receive traditional therapy and herb medicine was higher than a group who received these in degree of belief that the traditional therapy and herb medicine can cure their disease, and this result was higher in comparison to H.C Group(p=.025, p=.050). 2) Non H.C Group was higher than H.C Group in degree of emotional reaction(p=.050). H.C Group was higher than Non H.C Group in denial and acceptant stage among 5 different emotional stages before dying described by Kubler Ross, especially among the patient who had disease more than 13 months(p=.0069, p=.0198). 3) Non H.C Group was higher than H. C Group in demanding more emotional and spiritual care to doctor, nurse, family and pastor(p=. 010). 4) Non H.C Group was higher than H.C Group in demanding more emotional and spiritual care to each individual of doctor, nurse and family (p=.0110, p=.0029, P=. 0053). 5) H.C Group was higher th2.n Non H.C Group in degree of intrinsic behavior orientation and intrinsic belief orientation of personal religious orientation(p=.034, p=.026). 6) In H.C Group and Non H.C Group, the degree of emotional demanding of christians was significantly higher than non christians to doctor, nurse, family and pastor(p=. 000, p=.035). 7) In H.C Group there were significant positive correlations as following; (1) Between the degree of emotional demandings to doctor, nurse, family & pastor and: the degree of intrinsic behavior orientation in personal religious orientation(r=. 5512, p=.000). (2) Between the degree of emotional demandings to doctor, nurse. family & pastor and the degree of intrinsic belief orientation in personal religious orientation(r=.4795, p=.000). (3) Between the degree of intrinsic behavior orientation and the degree of intrinsic: belief orientation in personal religious orientation(r=.8986, p=.000). (4) Between the degree of extrinsic religious orientation and the degree of consensus religious orientation in personal religious orientation (r=. 2640, p=.015). In H.C. Group there were significant negative correlations as following; (1) Between the degree of intrinsic behavior orientation and extrinsic religious orientation in personal religious orientation (r=-.4218, p=.000). (2) Between the degree or intrinsic behavior orientation and consensus religious orientation in personal religious orientation(r=-. 4597, p=.000). (3) Between the degree of intrinsic belief orientations and the degree of extrinsic religious orientation in personal religious orientation(r=-.4388, p=.000). (4) Between the degree of intrinsic belief orientation and the degree of consensus religious orientation in personal religious orientation(r=-. 5424, p=.000). 8) In Non H.C Group there were significant positive correlation as following; (1) Between the degree of emotional demandings to doctor, nurse, family & pastor and the degree of intrinsic behavior orientation in personal religious orientation(r= .3566, p=.007). (2) Between the degree of emotional demandings to doctor, nurse, family & pastor and the degree of intrinsic belief orientation in personal religious orientation(r=.3430, p=.010). (3) Between the degree of intrinsic behavior orientation and the degree of intrinsic belief orientation in personal religious orientation(r=.9723, p=.000). In Non H.C Group there were significant negative correlation as following; (1) Between the degree of emotional demandings to doctor, nurse, family & pastor and the degree of extrinsic religious orientation in personal religious orientation(r= -.2862, p=.027). (2) Between the degree of intrinsic behavior orientation and the degree of extrinsic religious orientation in personal religious orientation(r=-. 5083, p=.000). (3) Between the degree of intrinsic belief orientation and the degree of extrinsic religious orientation in personal religious orientation(r=-. 5013, p=.000). In conclusion above datas suggest that hospice care provide effective total nursing care for the patients with terminal cancer, and hospice care is mandatory in all medical institutions.

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중국 수출기업의 국제기업가지향성이 수출성과에 미치는 영향 - 국제화정도와 시장역동성의 조절효과를 중심으로 - (The Effects of International Entrepreneurial-orientation on the Export performance of Chinese Export company - The moderating Effects of degree of International and Market dynamism -)

  • 박증남;유승훈
    • 경영과정보연구
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    • 제36권5호
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    • pp.99-120
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    • 2017
  • 최근 연구를 살펴보면 다국적기업이 국제경영 활동에서 국제기업가지향성은 기업성과의 향상에 아주 중요한 수단으로 인식되고 있지만 이들 관계는 다양한 연구결과를 보여주고 있다. 따라서 개발도상국인 중국 수출기업을 대상으로 선정하였을 때 이들 관계가 선형관계를 미치는지 아니면 비선형관계를 미치는지에 대한 검증은 매우 흥미로운 연구주제가 될 수 있다. 본 논문의 연구목적은 중국 수출기업을 대상으로 국제기업가지향성과 수출성과에 비선형의 영향을 미치는지를 검증하고, 국제화 정도와 시장역동성의 조절효과를 검증하고자 한다. 본 논문의 가설검증을 위해 사용된 설문지는 총 478부이다. 연구결과를 요약하면 첫째, 국제기업가지향성과 수출성과의 관계는 J형 관계인 것으로 나타났다. 둘째, 국제화 정도는 국제기업가지향성과 수출성과의 J형 관계를 더욱 강화하는 것으로 나타났다. 셋째, 국제화정도가 높을수록 국제기업가지향성과 수출성과의 J형 관계는 강화되고 이러한 조절작용은 시장이 역동적일수록 더욱 강화되는 것으로 나타났다. 연구결과는 다음과 같은 이론적 기여와 경영적 기여를 한다. 이론적 기여로는 국제기업가지향성과 수출성과는 비선형 관계(J형)를 형성한다는 것이 확인되면서 국제기업가지향성과 수출성과의 관계를 새롭게 접근할 수 있는 실증적인 기여를 이루었다. 경영적 기여로는 역동적인 해외시장에서 국제화정도가 높은 중국기업은 수출성과의 향상을 위해서는 국제기업가지향성 행위를 지속적으로 실행해야 한다는 것을 시사한다.

사회적기업가정신 척도 개발 및 타당화 연구: 조직차원의 행동적 관점에서 (Development and Validation of the Social Entrepreneurship Measurement Tools: From an Organizational-Level Behavioral Perspective)

  • 조한준
    • 벤처창업연구
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    • 제18권3호
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    • pp.97-113
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    • 2023
  • 본 연구는 협력지향성이 추가된 사회적기업가정신 모형을 일반화하고 모형의 이론적·실무적 활용 가능성을 높이고자 측정도구를 개발하여 사회적기업의 경영자 389명을 대상으로 실증하였다. 측정도구 개발은 선행연구 고찰을 통해 예비측정문항을 구성하고 측정문항에 대한 전문가 패널 검토를 거쳐 잠정적으로 다섯 개 영역, 40개의 측정문항으로 설문지를 구성하였다. 한국의 사회적기업 경영자를 대상으로 설문조사를 실시하여 총 389부의 설문이 수집되었으며, 이 중 분석 가능한 설문지 375부를 활용하여 탐색적 요인분석과 확인적 요인분석을 실시하였다. 탐색적 요인분석과 신뢰도 분석을 통해 24개의 문항에 대한 다섯 개 요인이 도출되었다. 일·이차 확인적 요인분석을 포함한 일련의 분석과정을 통하여 새롭게 구성된 사회적기업가정신 연구모형의 모형적합성을 확인하고 척도의 타당성과 신뢰성을 검증하였다. 본 연구에서는 협력지향성이 추가된 사회적기업가정신: 사회적가치지향성; 혁신성; 진취성; 위험감수성; 협력지향성 모형을 측정하는 도구를 새롭게 개발하고 양적연구를 수행하여 연구모형을 객관화함으로써 모형의 일반화 가능성을 입증하였다. 또한 연구를 통해 협력지향성이 사회적기업의 자원동원 및 역량강화, 기회 및 성과 창출, 사회적 자본 및 네트워크 강화, 거버넌스 구축을 위한 기업의 의사결정 및 활동의 행태로 발현됨을 확인하였다. 이러한 연구의 결과는 사회적기업가정신 연구의 이론적 설명력을 향상시킴과 동시에 후속 연구의 이론적 확장 근거와 토대를 제공한다. 다음으로 본 연구에서 타당성과 신뢰성이 검증된 사회적기업가정신 척도는 사회적기업가정신을 측정하는 도구로 학술연구와 실무에서 폭넓게 활용될 수 있다. 새롭게 개발된 척도는 사회적기업가정신 관련 연구에 있어서 조직차원의 행동적 관점에서 사회적기업가정신을 측정하는 도구로 활용될 수 있는 학술적 근거를 마련하였으며, 실무적으로도 기업의 기업가적 활동을 증진하고 자생력 강화를 지원하기 위한 조직의 사회적기업가정신 수준 측정 및 진단 도구로 활용될 수 있다.

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Three-dimensional reconstruction of polycrystals using a series of EBSD maps obtained from Dual-beam experiments

  • Kim, MinJi;Son, Youngkyun;Lee, Myeongjin;Jeon, Youngju;Lee, Sukbin
    • 한국진공학회:학술대회논문집
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    • 한국진공학회 2016년도 제50회 동계 정기학술대회 초록집
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    • pp.172-172
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    • 2016
  • Dual-beam experiments (Focused ion beam - Orientation mapping microstructure, FIB-OIM) is a widely used experimental tool because this experiments tool available alternates between automated serial sectioning and EBSD with the help of dual beams. We investigated the reconstruction procedure for analysis tool which three-dimensional internal microstructure using Ni superalloy(IN100) and ZrO2. As a results, we observed annealing twin boundary each layer in Ni superalloy(IN100) and fairly isotropic internal microstructure in ZrO2 using marching cubes algorithm. According to these results, this procedure is reconstructed well and we gained ability to arrange the EBSD map and internal microstructure.

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병렬기구형 CNC 공작기계의 개발 (Development of a Parallel-Typed CNC Machine)

  • 이민기;최병오;김태성;박근우
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2000년도 추계학술대회논문집A
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    • pp.535-540
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    • 2000
  • This paper presents the development of a Parallel-Typed CNC Machining Tool. It is specially designed to machine a complex shaped workpiece by controlling the orientation of the tool. The inverse/direct kinematics of a parallel mechanism is derived and implemented in a PC based controller. With graphics icons, the GUI (Graphic User Interface) program is developed for the CNC programing. The calibration is accomplished by geometric constraint motion, which is a parallel motion of the platform with respect to a table. The calibration result is introduced and the future study is proposed.

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포텐셜 에너지를 이용한 5축 NC 밀링의 공구방향 결정 (Determination of Tool Orientation in 5-Axis Milling Using Potential Energy Method)

  • 조인행;이건우
    • 한국정밀공학회지
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    • 제13권6호
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    • pp.161-167
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    • 1996
  • In five-axis milling, optimal CL-data (cutter location data) should be generated to have advantages over three-axis milling in terms of accuracy and efficiency. This paper presents an algorithm for generating collision-free CL-data for five-axis milling using potential energy method. By virtually charging the cutter and part surfaces with static electricity, global collision as wells as local interference is eliminated. Additionally, machining efficiency is improved by minimizing the curvature difference between the part surface and tool swept surface at a CC-point (cutter contact point) simultaneously.

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C-space 및 유효반경-맵을 이용한 5축 페이스 밀링의 공구자세 최적화에 관한 연구 (CL-data Optimization of 5-axis Face-milling Via C-space and Effective-radius Map)

  • 박정환;이정근
    • 한국CDE학회논문집
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    • 제7권1호
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    • pp.34-41
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    • 2002
  • Five-axis NC machining, in general, is utilized in fabricating impellers, turbine blades, marine propellers that can be machined more effectively rather than three-axis machining. There have been many researches concerning tool interference avoidance, optimization of tool orientation. The C-space or Configuration-space was originated from the robotics area, which depicts interference-free joint-values in motion planning. In the paper we propose an optimizing scheme by which the maximum effective-radius of a face-milling cutter can be achieved for each CC(cutter-contact) point. Also the concept of a C-space for a CC point, the effective-radius map for 5-axis face-milling, and some illustrative examples of marine propeller machining, are presented.