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Balancing 모듈 설계를 위한 Differential Gear System의 구조해석에 관한 연구
장태환 ( T. H. Jang ),김동준 ( D. J. Kim ),문창호 ( C. H Moon ),이성재 ( S. J. Lee ),김태규 ( T. G. Kim ) 한국열처리공학회 2019 熱處理工學會誌 Vol.32 No.6
In this study, simulation structure analysis was performed for the differential gear system for passenger cars as a prerequisite for the design of the balancing module. The differential gear system was modeled by using CATIA and simulation structure analysis was performed using ANSYS software. The material of the modeled differential gear system uses the mechanical properties of S45C (Q&T). In the structural analysis of the differential gear, the areas where the maximum stress and the maximum strain occurred can be identified. The maximum stress and maximum strain occurred in the pitch circle of the bevel gear. In evaluating the safety factor, it was found that sufficient safety factor was secured. Based on the analysis results for the differential gear, it is expected that it will be a good reference if we design the balancing module device. (Received November 5, 2019; Revised November 11, 2019; Accepted November 22, 2019)
Effect of Diamond like Carbon Coating Thickness on Stainless Steel Substrate
Abdul Wasy(압둘와지),Balakrishnan G(발라크리쉬난),Y.Q. Wang(왕일기),J.I. Song(송정일),S.H. Lee(이승훈),J.K. Kim(김종국),D.G. Kim(김도근),T.G. Kim(김태규) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.5
Diamond like carbon coatings have excellent wear properties with high hardness. The hardness and adhesion properties vary with sp3/sp2 ratio and coating thickness. In this research, effect of coating thickness on stainless steel substrate has studied. Diamond like carbon coatings of 300nm, 500nm, and 650nm has deposited using Filter Cathodic Vacuum Arc System with Magnetron sputtered Chromium interlayer. The characterization includes, Field Emission Electron Microscopy, Raman spectroscopy, Tribology and Adhesion strength evaluation. It was concluded that, surface finish decreased with increase in coating thickness. Maximum ID/IG of 0.84 was obtained for 30nm diamond like carbon coated stainless steel. The minimum average friction coefficient of 0.115 was obtained for 500nm coating. Moreover, it was observed that, friction coefficient decrease with increase in coating thickness in initial phases, after certain time it increase directly proportional to thickness. For adhesion strength, LC1 was found good for 650nm and LC2 for 500nm respectively.
HFCVD 증착 온도 변화에 따른 단결정 다이아몬드 표면 형상 및 성장률 변화
권진욱,김민수,장태환,배문기,김성우,김태규,Gwon, J.U.,Kim, M.S.,Jang, T.H.,Bae, M.K.,Kim, S.W.,Kim, T.G. 한국열처리공학회 2021 熱處理工學會誌 Vol.34 No.5
Following Silicon Carbide, single crystal diamond continues to attract attention as a next-generation semiconductor substrate material. In addition to excellent physical properties, large area and productivity are very important for semiconductor substrate materials. Research on the increase in area and productivity of single crystal diamonds has been carried out using various devices such as HPHT (High Pressure High Temperature) and MPECVD (Microwave Plasma Enhanced Chemical Vapor Deposition). We hit the limits of growth rate and internal defects. However, HFCVD (Hot Filament Chemical Vapor Deposition) can be replaced due to the previous problem. In this study, HFCVD confirmed the distance between the substrate and the filament, the accompanying growth rate, the surface shape, and the Raman shift of the substrate after vapor deposition according to the vapor deposition temperature change. As a result, it was confirmed that the difference in the growth rate of the single crystal substrate due to the change in the vapor deposition temperature was gained up to 5 times, and that as the vapor deposition temperature increased, a large amount of polycrystalline diamond tended to be generated on the surface.
Differential gear case와 피니언 샤프트 체결을 위한 핀 압입 장치설계 및 측정에 관한 연구
장태환 ( T. H. Jang ),권진욱 ( J. U. Gwon ),엄지현 ( J. H. Eum ),김정아 ( J. A. Kim ),김태규 ( T. G. Kim ) 한국열처리공학회 2021 熱處理工學會誌 Vol.34 No.1
The differential gear system is a device designed to distribute the driving force of both vehicle wheels and control the rotational speed when the vehicle turns on a curve. The differential device consists of a differential gear case, a ring gear, and a pressure ring. A differential pinion gear and side gear are mounted on the differential pinion shaft inside the differential gear case. In this study, a pin press-fitting device that mounts the pinier gear and side gear to the differential pinion shaft in the differential gear case was designed, and a jig device for pin press-fitting using servo press was developed. In addition, by precisely measuring the pin press-in load and press-in distance according to the pin hole diameter of the differential gear shaft, the optimization of the pin pressin process was established. (Received January 7, 2021; Revised January 14, 2021; Accepted January 18, 2021)