• Title/Summary/Keyword: Shape Drawing Experiment

Search Result 51, Processing Time 0.022 seconds

Prediction of Drawing Load in the Shape Drawing Process (이형인발공정 하중예측에 관한 연구)

  • Lee, T.K.;Lee, C.J.;Lee, S.K.;Kim, B.M.
    • Transactions of Materials Processing
    • /
    • v.18 no.4
    • /
    • pp.323-328
    • /
    • 2009
  • The prediction of drawing load is very important in the drawing process. However, it is not easy to calculate the drawing load for the shape drawing process through a theoretical model because of a complex arbitrary final cross section shape. The purpose of this study is to predict drawing load in shape drawing process. The cross section of product is divided with small angle as much as similar with fan-shape. The drawing load of each section was calculated by theoretical model of round to round drawing process. And the shape drawing load was determined by summation of drawing load of each section. The effectiveness of the proposed method was verified through the FE analysis and shape drawing experiment. It had a good agreement between proposed method, FE analysis and experiment within about 3% errors.

Development of Intermediate Die Shape Design Program for Multi-Pass Shape Drawing by Using VisualLISP (VisualLISP을 이용한 다단이형인발 중간패스 단면형상설계 프로그램 개발)

  • Lee, S.K.;Lee, S.B.;Kim, B.M.
    • Transactions of Materials Processing
    • /
    • v.19 no.4
    • /
    • pp.242-247
    • /
    • 2010
  • In the multi-pass shape drawing process, it is important to design the intermediate dies for producing sound products. Up to now, the design of the intermediate dies is mainly carried out by the industrial experts based on their experience. In this study, a design program was developed to design the intermediate dies for multi-pass shape drawing process. The program was programmed by using VisualLISP. In this program the intermediate dies can be designed by using the initial material shape and the final product shape. In order to verify the effectiveness, the program was applied to design the intermediate dies of multi-pass shape drawing for producing four teeth spline and gun slide. Finally, FE analysis and shape drawing experiment were performed to verify the effectiveness of the designed intermediate dies. As a result, it was possible to produce the drawn products with the required dimensional accuracy.

Process Design of Multi-pass Shape Drawing Considering the Drawing Stress (인발응력을 고려한 다단 형상인발 공정설계)

  • Kim, S.M.;Lee, S.K.;Lee, C.J.;Kim, B.M.;Jeong, M.S.;Kim, B.M.
    • Transactions of Materials Processing
    • /
    • v.21 no.4
    • /
    • pp.265-270
    • /
    • 2012
  • In this study, a process design method for the multi-pass shape drawing is proposed with consideration of the drawing stress. First, the shape drawing load was calculated to evaluate the shape drawing stress, and the intermediate die shape was determined by using an electric field analysis and the average reduction ratio. In order to evaluate whether material yielding occurs at the die exit, the drawing stress was determined by using the calculated shape drawing load. Finally, FE-analysis and shape drawing experiments were conducted to validate the design of the multi-pass shape drawing process. From the results of the FE-analysis and shape drawing experiments, it was possible to produce a sound shape drawn product with the designed process. The dimensional tolerances of the product were within the allowable tolerances.

Process Design of Multi-Stage Shape Drawing Process for Cross Roller Guide (크로스 롤러 가이드 다단 형상인발 공정설계에 관한 연구)

  • Lee, Sang-Kon;Lee, Jae-Eun;Lee, Tae-Kyu;Lee, Seon-Bong;Kim, Byung-Min
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.26 no.11
    • /
    • pp.124-130
    • /
    • 2009
  • In the multi-stage shape drawing process, the most important aspect for the economy is the correct design of the various drawing stage. For most of the products commonly available round or square materials can be used as initial material. However, special products should be pre-rolled. This study proposes a process design method of multi-stage shape drawing process for producing cross roller guide. Firstly, a standard classification of shape drawing process is suggested based on the requirement of pre-rolling process. And a design method is proposed to design the intermediate die shape. The process design method is applied to design the multi-stage shape drawing process for producing cross roller guide. Finally, the effectiveness of the proposed design method is verified by FE-analysis and shape drawing experiment.

Optimization of Process Variables of Shape Drawing for Steering Spline Shaft (조향장치용 스플라인 샤프트 이형인발 공정변수 최적화)

  • Lee, S.K.;Kim, S.M.;Lee, S.B.;Kim, B.M.
    • Transactions of Materials Processing
    • /
    • v.19 no.2
    • /
    • pp.132-137
    • /
    • 2010
  • In the multi-pass shape drawing process, the appropriate process design is very important to produce sound products. The reduction ratio, die angle, and the intermediate die shape are very important process variable of the multi-pass shape drawing. The aim of this study is the determination of the reduction ratio, die angle, and the intermediate die shape of the 2 pass shape drawing process for producing steering spline shaft. In this study, FE analysis, Taguchi method, and ANN(artificial neural network) were applied to determine the appropriate reduction ratio, die angle, and intermediate die shape. After the determination of the process variables, FE analysis and drawing experiment were performed to evaluate the effectiveness of the determined process variables. The dimensional accuracy of the final drawn spline shaft was evaluated by using 3D surface profiler and 3D laser digitizing system.

A Study on the Pass Schedule of Multi-Pas Shape Drawing Process for Cross Roller Guide (크로스 롤러가이드의 다단형상인발공정 패스 스케쥴에 관한 연구)

  • Lee, T.K.;Lee, C.J.;Lee, S.K.;Lee, S.B.;Kim, B.M.
    • Transactions of Materials Processing
    • /
    • v.18 no.7
    • /
    • pp.550-555
    • /
    • 2009
  • In the multi-pass shape drawing process, the pass schedule that includes the determination of reduction ratio and intermediate die shape is very important. This study used the equal reduction, equal load, and electric field analysis method for pass schedule of the multi-pass shape drawing. The reduction ratio was calculated by the equal reduction and equal load method. And the intermediate die shape was determined by the result of the electric field analysis and the calculated reduction ratio. The proposed pass schedule method was applied to a shape drawing for producing cross roller guide. Finally, FE-analysis and shape drawing experiment were performed to verify the effectiveness of the proposed method.

A Study on Improvement of Formability for Deep Drawing Process (디프 드로잉 공정의 성형성 향상에 관한 연구)

  • 최병근
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 1999.03b
    • /
    • pp.70-76
    • /
    • 1999
  • Recently most of researches for deep drawing process using sheet metal have been performed on the formability of axisymmetric shape but there have not been any concrete reports on the formability of non-axisymmetric shape In addition the conventional shape radius of the punch and die has been determined by the trying-and-error using industrial experimence and post processing test and only approximate shape radius of the punch and die has been determined by the trying-and-error using industrial experience and post processing test and only approximate shape radius of the punch and die has been present So in this study the optimal shape radius of the punch and die in deep drawing process with biaxisymmetric blank shape would be proposed. Through the deep drawing experiment it is found that in order to obtain the optimal products especially shape radius of the punch and die in all processes is very important.

  • PDF

A Stud on Punch and Die Shape Radii of Non-Axisymmetric Deep Drawing Product (비축대층 디프 드로잉 제품의 펀치 및 다이 형상반경에 관한 연구)

  • 배원락
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2000.04a
    • /
    • pp.92-95
    • /
    • 2000
  • In order to obtain the optimal products in deep drawing process elliptical deep drawing tests were carried out with several shape radii of the punch and die. As parameters on testing shape radii of the punch and die were selected, In addition the conventional shape radii have been determined by trial=and-error using industrial experience and post processing test and only approximate shape radii of the punch and die have been presented. The optimal shape radii of the punch and die in elliptical deep drawing process with biaxisymmetric blank shape are proposed. In this study we suggest the appropriate conditions to be applicable to the catual manufacturing processes through the experiment and finite element method.

  • PDF

An Experimental Study on Improvement of Formability for Elliptical Deep Drawing Process (타원형 디프 드로잉 공정의 성형성 향상에 관한 실험적 연구)

  • 박동환;박상봉;강성수
    • Transactions of Materials Processing
    • /
    • v.9 no.2
    • /
    • pp.120-127
    • /
    • 2000
  • Recently, most of researches for sheet metal deep drawing process have been performed on the formability of axisymmetric shape, but there are not any concrete reports on the formability of non-axisymmetric shape. In addition, the conventional shape radius of the punch and die has been determined by trial-and-error using industrial experience and post processing test, and only approximate shape radius of the punch and die has been presented. In this study, the optimal shape radius of the punch and die in deep drawing process with biaxisymmetric blank shape is proposed. Through the deep drawing experiment, especially it is found that in order to obtain the optimal products, and improvement of formability can be researched by selection of such punch and die shape radius that gives an adequate thickness distribution in all processes.

  • PDF

Analysis of Sheet Metal Forming for Non-Axisymmetric Deep Drawing Products (비축대칭 디프 드로잉 제품의 박판 성형 해석)

  • 박동환;배원락;강성수
    • Transactions of Materials Processing
    • /
    • v.10 no.3
    • /
    • pp.185-192
    • /
    • 2001
  • In order to obtain the optimal products in deep drawing process, elliptical deep drawing tests were carried out with several shape radii of the punch and die. As parameters on testing, shape radii of the punch and die were selected. In addition, the conventional shape radii have been determined by trial-and-error using industrial experience and post processing test, and only approximate shape radii of the punch and die have been presented. The optimal shape radii of the punch and die in elliptical deep drawing process with biaxisymmetric blank shape are proposed. In this study, we suggest the appropriate conditions to be applicable to the actual manufacturing processes through the experiment and finite element method.

  • PDF