Transcript
Page 1: Incremental sheet metal forming - Incremental Single Point

Incremental sheet metal Forming

single Point Incremental Forming

Metal forming Course

Compiled By: Houshang Ansari kajal

Hassan kargar Pishbijari Hassan Yousefinezhad Gildeh

MS.C Students Of Manufacturing & Production

lecturer : Dr.M.bakhshi

Babol Industrial University www.nit.ac.ir

Dec.2012 1/31

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Contents:

1- Abstract

2- Introduction

3- Methods

4- Characteristics

5- Applications

6- Tools & Equipments

7- Advantages & disadvantages

8- Conclusion

9- Suggestion

10- Research & Developments

11- Acknowledgments

12- References Return

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Abstract During the last decade, incremental forming is an innovative

processing method which has been strongly investigated. Its potential

as a flexible manufacturing method was noticed.

Incremental sheet forming is a method , where a spherical

numerically controlled tool is used to push the sheet to the desired

shape against a simple support tool.

keywords: Incremental sheet forming , Die less Forming ,

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Introduction In the manufacturing world of today , the

demand of highly customized is increasing every

day . Even if the mass production is still used, the

small quantity batches are more and more

required. The key words of manufacturing are:

Flexibility , product customization, Customer

Orientation , high quality , low production cost.

In sheet metal forming techniques

, several evolution has made big steps

in the last period of time:

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Steps in sheet metal forming

1-Conventional Deep Drawing

2-NC control for stamping & bending

3-Hydroforming.

4-Multi-point tools

5-Incremental Sheet forming (ISF)

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Conventional Deep Drawing

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CNC control for stamping & bending

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Hydroforming.

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Multi-point tools

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Incremental Sheet forming (ISF)

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History of ISF

Variations of ISF have long been practiced in small workshops and

private enterprises , and some early concepts of ISF were patented:

1- In the USA by Roux (1960) and Leszak(1967).

2- Academic research bean in the early 1990 in Japan

3- Recently has attracted increasing interest in Europe and Canada.

SPIF & TPIF

4- SPIF of circular and elliptical by Iseki et al (1993)

5- Used FE analysis to strains by Shim and park (2001)

6- Moving back and forth along a straight line by Kim and park (2002)

7- Pyramids formed by SPIF and TPIF byBambach et al (2003)

8- Cone formed byFratini et al(2004)

8- A comprehensive review of the development of the process is given

by Jeswiet et al (2005)

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Method's

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Method's Spinning

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Method's Single-point

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Method's Two-point

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Method's -> SPIF & TPIF

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Characteristic's

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Forming Step & Tool patch

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Forming Step & Tool patch

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Application’s

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Application’s

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Forming Parameters

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d: Tool diameter

t.: Sheet thickness

α: Tool direction angle

S: Spindle rpm

f: Federate

∆z: Step movment

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Tools & equipment’s

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Hexapod machine

Forming Tool

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Tools & equipment’s

RoBoShaping

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Advantages & disadvantages Advantages :

1- The advantage of utilizing a conventional CNC milling machine.

2- Increase in materials formability due to the nature of the process.

3- The great flexibility derived from the absence of positive or negative dies.

4- Easley in re-setup of equipment's for part changing.

5- forming forces is too small than Deep Drawing forces.

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Advantages & disadvantages

Disadvantages:

1- Spring Back.

2- Sheet fracture under Tool 3- deformation and Un-like form

Pressure and friction.

4- forming time is too large than deep drawing time.

5- In negative forming ,it’s difficult to form sharp corner & edge

because crack easily occur.

6- Deformation and Un-Like form sometimes occur.

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Conclusion

1- Increase in sheet thickness Increase in strain Increase in formability.

2- Increase in Tool diameter decrease in stress decrease in formability.

3- Increase in Tool Federate Increase in stress decrease in formability.

4- Increase in Tool speed Increase in heat Increase in formability.

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Suggestion’s

With discussed characteristic's and flexibility of ISF(SPIF & TPIF)

We suggestion’s to provide research for following further

application :

1-Use of ISF to forming thermoplastics sheet.

2- Use of ISF to car body smoothing.

3- Deliberation of pre-heat effect on formability.

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Research & Developments

Macro Incremental Forming

the main focus of our work has been on application-oriented research and

development in the field of production technology for the automotive and

mechanical engineering sectors.

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References

1- Jong-Jin park , Yung-ho Kim, “Fundamental studies on incremental sheet metal forming

technique” , Journal of Materials processing Technology 140 (2003) 447-453.

2- “Incremental sheet metal forming : a die –less rapid prototyping process for sheet metal” , IMRC

(manufacturing Process and systems Research project), University of BATH.

3- Crina Radu ,” Effect of process parameters on the quality of parts processed by single point

incremental forming”, International journal of modern manufacturing technologeis , vol.III.No.2/2011.

4- Alexandru C.FILIP , Ion NEAGOE,”An overview on incremental sheet forming , a method for rapid

manufacturing of hollow metal parts", Academic journal of manufacturing engineering , vol.8,issue

3/2010.

5- M Skjoedt , M B Silva , P A F martins , N Bay , “ strategies and limits in multi-stage single-point

incremental forming", technical university of Denmark, department of mechanical engineering,

kongens lyngby, Denmark, strain Analysis vol.45.

6-W.C.Emmens , D.H.Van , A.H.Van,” The FLC , enhanced formability , and incremental sheet

forming”,International Deep drawing research group.IDDRG 2009 int.Conference.Golden.Co.USA.

7- A.petek,K.kuzman,J.Kopac,”Deformation and forces analysis of single point incremental sheet

metal forming”,International scintific journal , vol.35.issue 2.feb 2009.

8- Kathryn jackson,Julian Allwood ,”The mechanics of incremental sheet forming”,Department of

engineering,University of cambridge,Journal of materials processing technology 209(2009,1158-1174)

تجربی و تئوری بررسی «؛ ور جواب داریوش ؛ آقچای جاللی عبدالحسین ؛ جدیدی یوسفی محسن-9 مهندسی ملی همایش ،«تدریجی دهی شکل فرآیند در ورق پذیری شکل میزان بر فرایند پارامترهای تاثیر

.1391 مهرماه ، الیگودرز واحد اسالمی آزاد دانشگاه ،NCME2010مکانیک دهی شکل فرایند در فلزی ورق دهی فرم عیوب بهبود«، صفت وفایی عباس ، نظامی گر ریخته وحید -10

اسفندماه ، ICME 2010 ایران تولید و ساخت مهندسی کنفرانس دهمین ، » فلزی ورقهای ای نقطه چند .بابل نوشیروانی صنعتی دانشگاه 1388

دهی شگل فرآیند در دورانی سرعت تاثیر تجربی و تئوری بررسی”، وحدتی مهدی ، وحدتی علیرضا-11 دانشگاه ایران، تولید و ساخت مهندسی کنفرانس ،دهمین”تراش ماشین روی بر فلزی ورق تدریحی 1388 اسفند بابل صنعتی

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