• Title/Summary/Keyword: auto-parts

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Robust Design of Springback in Sheet Metal Forming (박판 성형 공정에서 스프링백의 강건 설계)

  • Kim, Kyung-Mo;Yin, Jeong-Je
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.12 no.2
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    • pp.41-48
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    • 2013
  • Springback is a very typical dimensional discrepancy phenomenon, which occurs usually on the final stamping parts after the tool loading is removed. Variation of springback leads to amplified variations and problems during assembly of the stamped components, in turn, resulting in quality issues. The variations in the properties of the incoming material and process parameters are the main causes of springback variation. In this research, a robust design methodology which combines orthogonal array based experimental design and design space reduction skim to reduce the springback variation for advanced high strength steel parts in sheet metal forming is suggested. The concept of design space reduction is adapted in the experimental design setup to improve the quality of the obtained solution. The effectiveness of the proposed procedures is illustrated through a robust design of springback in metal forming process of a cross member of auto body.

A Development of Design Catalogue System for Recycling (리사이클링 고려 설계카탈로그 시스템의 구축)

  • Lee, Kun-Sang
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.6
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    • pp.177-186
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    • 2005
  • Today the tastes of consumers change rapidly and the kinds of the products become diverse. Therefore the product life cycle becomes shorter and shorter. Moreover the save of resources and the recycling for the environmental preservation are the essential theme. On this the necessary information for the product development increases enormously. For the right use of the information the design process should be supported by the proper design tool. For this the 'design catalogue system for recycling' is suggested here. This system consists of four parts, that is, 'the existing automobile system database', 'working principle database', 'assessment system of the ease of disassembly' and 'one's own product development database'. By the use of this system the product development period could be reduced about $30\%$ drastically.

Determining the Impact of Information Technology (IT) on Achieving competitive advantages in Third party logistics Companies (3PL): ISACO and SAIPALogistics

  • Javanmard, Habibollah;Ahmadi, Kourosh
    • The Journal of Economics, Marketing and Management
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    • v.3 no.1
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    • pp.1-22
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    • 2015
  • High growth and increasing traffic and transport finished vehicles, a significant impact on how organize the flow of parts to auto makers an dagencies have As a result, the automakers to improve its position as a highly responsive, with minimal costs, the out sourcing of their logistics processes. This paperis the result of field research to determine the effectiveness of the logistics industry in Iran and focuses on information technology deals the transport vehicle and parts sales deals, indicators used in the model include: IT focuses, IT Valence, IT Competency, IT Managerial Commitment, IT Resource Commitment and competitive advantage identified. Data collected by questionnaires from managers and experts have been towing companies ISACO and SAIPA trailer hypotheses using structural equation methods and software has been analyzed Amos, Results show, focusing on information technology now has significant impacts on logistics and transport. As a result the impact of, IT valence, IT competency and IT Managerial Commitment analytics to gain competitive advantage was not approved, but the rest of the factors were confirmed.

Development of Auto Polishing System for Automobile Door A-Fuel Filler using Image Processing (영상처리를 이용한 자동차 도어필러의 자동 폴리싱 시스템 개발)

  • Kim, Seong-Jin;Lee, Seong-Cheol
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.4
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    • pp.1807-1812
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    • 2014
  • A plastic has a various advantages in engineering elements that it can be formed a curve surface without restriction of shape and product the high volume with various color and lower price. Also, it is being used for many parts of automobile as the weight of cars is getting lighter. The Door A-Fuel Filler is a automobile plastic part by injection molding production. The injected products are involved a lot of factors for the inferior goods after painting. Therefore the painted products are required to have the process of the polishing in order to eliminate the faults. Now polishing process is being worked by hands. The workers tend to evade the process of polishing because the working needs a lot of powers momentarily. This paper presents the development of auto-polishing system that can check the inferior goods by the vision system and control the polishing process by the motion system. As a result, Shorten production time (30 seconds), and decreases by 1 person to work to increase the competitiveness of the production cost was to expect improvement.

Reliability Improvement of an Auto Transfer Switch (자동 전환 개폐기의 신뢰성 향상에 관한 연구)

  • Cho, Hyung Jun;Baek, Jung-Ho;Yeu, Bong-Ki;Kang, Tae-Seok;Kim, Kil-Sou;Yang, Il Young;Yoo, Hwan Hee;Yu, Sang Woo;Kim, Yong Soo
    • Journal of Applied Reliability
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    • v.16 no.2
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    • pp.162-170
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    • 2016
  • Purpose: The purpose of this study was to analyze the failure modes of an auto transfer switch (ATS), determine the most common failure mechanisms, and iterate the design to improve reliability. Methods: We carried out failure mode and effect analysis (FMEA) to determine the failure modes and mechanisms. We identified the parts or modules that required improvement via two-stage quality function deployment based on FMEA, and improvements to reliability were monitored using the Gomperz growth model. Results: The main failure modes of the ATS were damage to, and deformation of, the stator / movable element due to repetitive movements. Five iterations of design modification were carried out, and the mean time to failure (MTTF) increased to 14,539 cycles, corresponding to 85% of the target MTTF. The Gompertz growth model indicates that the 10th iteration of design modification is expected to achieve the target MTTF. Conclusion: We improved the reliability of mechanical parts via failure mode analysis, and characterized the iterative improvements in the MTTF using the Gompertz growth model.

An Automated Process Planning and Die Design System for Quasi-axisymmetric Cold Forging Product (준축대칭 제품의 냉간단조 공정설계 및 금형설계 자동화 시스템 개발)

  • Park, Jong-Ok;Lee, Joon-Ho;Jung, Sung-Yuen;Kim, Chul;Kim, Moon-Saeng
    • Journal of the Korean Society for Precision Engineering
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    • v.19 no.1
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    • pp.107-118
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    • 2002
  • This paper deals with an automated computer-aided process planning and die design system by which designer can determine operation sequences even if they have a little experience in process planning and die design of quasi-axisymmetric cold forging product by cold former working. The approach to the system is based on knowledge-based rules and a process knowledge base consisting of design rules is built. Knowledge for the system is formulated from plasticity theories, empirical results and the empirical knowledge of field experts. Programs for the system have been written in AutoLISP for the AutoCAD using a personal computer. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM softwares, DEFORM and ANSYS, to form a useful package. The system is composed of three main modules and five sub-modules. The process planning and die design module considers several factors, such as the complexities of preform geometry, punch and die profiles, specifications of available cold farmer, and the availability of standard parts. As the system using 2D geometry recognition is integrated with the technology of process planning, die design, and CAE analysis, the standardization of die parts for wheel bolt requiring cold forging process is possible. The developed system makes it possible to design and manufacture quasi-axisymmetric cold forging product more efficiently.

A Study of Automated Process Planning and Die Design for Multi Former-Bolt Products (다단포머-볼트류 공정 및 금형설계 자동화 시스템 개발)

  • Park, Chul-Woo;Kang, Jung-Hoon;Lee, Jun-Ho;Kim, Chul;Kim, Moon-Saeng;Choi, Jae-Chan
    • Journal of the Korean Society for Precision Engineering
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    • v.20 no.4
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    • pp.29-38
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    • 2003
  • This paper deals with an automated computer-aided process planning and die design system with which designer can determine operation sequences even after only a little experience in process planning and die design of multi former-bolt products by multi-stage former working. The approach is based on knowledge-based rules, and a process knowledge base consisting of design rules is built. Knowledge fur the system is formulated from plasticity theories, empirical results and the empirical knowledge of field experts. Programs for the system have been written in AutoLISP for AutoCAD with a personal computer. An attempt is made to link programs incorporating a number of expert design rules with the process variables obtained by commercial FEM softwares, DEFORM and ANSYS, to form a useful package. The system is composed of four main modules. The process planning and die design module considers several factors, such as the complexities of preform geometry, punch and die profiles, specifications of available multi former, and the availability of standard parts. It can provide a flexible process based on either the reduction in the number of forming sequences by combining the possible two processes in sequence, or the reduction of deviation of the distribution and the level of the required forming loads by controlling the forming ratios. The system uses 2D geometry recognition and is integrated with the technology of process planning, die design, and CAE analysis. The standardization of die parts for multi former-bolt products requiring a cold forging process is described. The system developed makes it possible to design and manufacture multi former-bolt products more efficiently.

A Study on the Analysis of Representative Bus Crash Types through Establishment of Bus In-depth Accident Data (버스 실사고 데이터 구축을 통한 대표 버스충돌유형 분석 연구)

  • Kim, Hyung Jun;Jang, Jeong Ah;Lee, Insik;Yi, Yongju;Oh, Sei Chang
    • Journal of Auto-vehicle Safety Association
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    • v.12 no.4
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    • pp.39-47
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    • 2020
  • In this study, crash situations of representative bus crash types were elicited by analyzing a total of 1,416 bus repair record which were collected in 2018~2019. K-means clustering was used as a methodology for this study. Bus repair record contain the information of repair term, type of bus operation, responsibility of accident, weather condition, road surface condition, type of accident, other party, type of road and type of location for each data. Also, by checking collision parts of each bus repair record, each record was classified by types of collision regions. From this, 760 record are classified to frontal type, 363 record are classified to middle-frontal type, 374 record are classified to middle-rear type and 331 record are classified to rear type. As mentioned, k-means clustering was performed on each type of collision parts. As a result, this study analyzed the severity of bus crash based on actual bus accident data which are based on bus repair record not the crash data from the TAAS. Also, this study presented crash situation of representative bus crash types. It is expected that this study can be expanded to analyzing hydrogen bus crash and defining indicators of hydrogen bus safety.

Development of the Vision System to Inspect the Inside of the Brake Calipers (브레이크 캘리퍼 내부 검사를 위한 비전시스템 개발)

  • Kwon, Gyoung Hoon;Chu, Hyung Gon;Kim, Jin Young;Kang, Joonhee
    • Journal of Sensor Science and Technology
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    • v.26 no.1
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    • pp.39-43
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    • 2017
  • Development of vision system as a nondestructive evaluation system can be very useful in screening the defective mechanical parts before they are assembled into the final product. Since the tens of thousands of the mechanical parts are used in an automobile carefully inspecting the quality of the mechanical parts is very important to maximize the performance of the automobile. To sort out the defective mechanical parts before they are assembled, auto parts fabrication companies employ various inspection systems. Nondestructive evaluation systems are getting rapidly popular among various inspection systems. In this study, we have developed a vision system to inspect the inside of the brake caliper, a part that is used to compose a brake which is the most important to the safety of the drivers and the passengers. In a brake caliper, a piston is pushed against the brake disk by oil pressure, causing a friction to damp the rotation of the wheel. Inside the caliper, a groove is positioned to adopt an oil seal to prevent the oil leaks. Inspecting the groove with our vision system, we could examine the existence of the contaminants which are normally the residual tiny pieces from the machining process. We used a high resolution GigE camera, 360 degree lens to look in the inside view of the caliper at once, and a special illumination system in this vision system. We used the edge detection technique to successfully detect the contaminants which were in the form of small metal chips. Labview graphical program was used to process the digital data from the camera and to display the vision and the statistics of the contaminants. We were very successful in detecting the contaminants from the various size calipers. We think we are ready to employ this vision system to the caliper production factories.

Development of the Forecasting Model for Parts in an Automobile (자동차 부품 수요의 예측 모형 개발)

  • Hong, Jung-Sik;Ahn, Jae-Kyung;Hong, Suk-Kee
    • Journal of Korean Institute of Industrial Engineers
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    • v.27 no.3
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    • pp.233-238
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    • 2001
  • This paper deals with demand forecasting of parts in an automobile model which has been extinct. It is important to estimate how much inventory of each part in the extinct model should be stocked because production lines of some parts may be replaced by new ones although there is still demands for the model. Furthermore, in some countries, there is a strong regulation that the automobile manufacturing company should provide customers with auto parts for several years whenever they are requested. The major characteristic of automobile parts demand forecasting is that there exists a close correlation between the number of running cars and the demand of each part. In this sense, the total demand of each part in a year is determined by two factors, the total number of running cars in that year and the failure rate of the part. The total number of running cars in year k can be estimated sequentially by the amount of shipped cars and proportion of discarded cars in years 1, 2,$\cdots$, i. However, it is very difficult to estimate the failure rate of each part because available inter-failure time data is not complete. The failure rate is, therefore, determined so as to minimize the mean squared error between the estimated demand and the observed demand of a part in years 1, 2,$\cdots$, i. In this paper, data obtained from a Korean automobile manufacturing company are used to illustrate our model.

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