Flexible automation of clinching and adhesive bonding of sheet metal parts

Juha Varis, Raimo Penttilä, Veli Kujanpää

Research output: Book/ReportReportProfessional

Abstract

Adhesive bonding and mechanical joining techniques have developed rapidly in recent years and they have become more common joining techniques in sheet metal product industry. New joining techniques have become more popular because increasingly used precoated sheet materials are difficult to weld. New joining techniques can also be applied as well for precoated as for uncoated sheet metal materials. VTT Manufacturing Technology in cooperation with IVF has carried out a research project of flexible automation of joining techniques for sheet metals. The project consisted of flexible automation of mechanical joining and adhesive bonding of sheet metal parts. The joining techniques studied can be applied to supplement each other. The shape of a typical clinching tool is limiting the applications, because the tool must reach to both sides of the joint like in spot welding. Adhesive bonding without jigs can be used only for parts that are locking each other when joined. If no constructive locking appears the parts are kept steady in a jig or the parts are secured by clinching or riveting. The adhesive is also a sealing of the joint. The research equipment was developed and built in the laboratory of VTT, consisting of a robot with linear track, clinching equipment, adhesive bonding equipment, a flexible jig, a ventilation system and tables for loading and unloading of sheet metal parts. The demands for joint design and the economic effects of different joining techniques were studied. Five industrial case products were studied considering the utilization of clinching or adhesive bonding instead of spot welding or arc welding. The results of the studies show that clinching and adhesive bonding are possible to be automated flexibly. Existing sheet metal products usually need some re-design when a new joining method is applied. Sufficient joint strength for most sheet metal products can be produced by clinching or adhesive bonding. Joining costs depend very much on jig costs. Clinching reduces remarkably the lead time of adhesive bonded parts and reduces also jig costs. Clinching and adhesive bonding are very suitable joining techniques for several material combinations, especially for thicknesses less than 3 mm.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages40
ISBN (Print)951-38-4812-4
Publication statusPublished - 1995
MoE publication typeNot Eligible

Publication series

NameVTT Tiedotteita - Meddelanden - Research Notes
PublisherVTT
No.1657
ISSN (Print)1235-0605
ISSN (Electronic)1455-0865

Fingerprint

Sheet metal
Joining
Adhesives
Automation
Jigs
Spot welding
Riveting
Costs
Economic and social effects
Electric arc welding
Unloading
Ventilation
Welds
Robots

Keywords

  • metals
  • parts
  • sheets
  • adhesion
  • clinching
  • automation

Cite this

Varis, J., Penttilä, R., & Kujanpää, V. (1995). Flexible automation of clinching and adhesive bonding of sheet metal parts. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 1657
Varis, Juha ; Penttilä, Raimo ; Kujanpää, Veli. / Flexible automation of clinching and adhesive bonding of sheet metal parts. Espoo : VTT Technical Research Centre of Finland, 1995. 40 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1657).
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Varis, J, Penttilä, R & Kujanpää, V 1995, Flexible automation of clinching and adhesive bonding of sheet metal parts. VTT Tiedotteita - Meddelanden - Research Notes, no. 1657, VTT Technical Research Centre of Finland, Espoo.

Flexible automation of clinching and adhesive bonding of sheet metal parts. / Varis, Juha; Penttilä, Raimo; Kujanpää, Veli.

Espoo : VTT Technical Research Centre of Finland, 1995. 40 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1657).

Research output: Book/ReportReportProfessional

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AU - Penttilä, Raimo

AU - Kujanpää, Veli

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N2 - Adhesive bonding and mechanical joining techniques have developed rapidly in recent years and they have become more common joining techniques in sheet metal product industry. New joining techniques have become more popular because increasingly used precoated sheet materials are difficult to weld. New joining techniques can also be applied as well for precoated as for uncoated sheet metal materials. VTT Manufacturing Technology in cooperation with IVF has carried out a research project of flexible automation of joining techniques for sheet metals. The project consisted of flexible automation of mechanical joining and adhesive bonding of sheet metal parts. The joining techniques studied can be applied to supplement each other. The shape of a typical clinching tool is limiting the applications, because the tool must reach to both sides of the joint like in spot welding. Adhesive bonding without jigs can be used only for parts that are locking each other when joined. If no constructive locking appears the parts are kept steady in a jig or the parts are secured by clinching or riveting. The adhesive is also a sealing of the joint. The research equipment was developed and built in the laboratory of VTT, consisting of a robot with linear track, clinching equipment, adhesive bonding equipment, a flexible jig, a ventilation system and tables for loading and unloading of sheet metal parts. The demands for joint design and the economic effects of different joining techniques were studied. Five industrial case products were studied considering the utilization of clinching or adhesive bonding instead of spot welding or arc welding. The results of the studies show that clinching and adhesive bonding are possible to be automated flexibly. Existing sheet metal products usually need some re-design when a new joining method is applied. Sufficient joint strength for most sheet metal products can be produced by clinching or adhesive bonding. Joining costs depend very much on jig costs. Clinching reduces remarkably the lead time of adhesive bonded parts and reduces also jig costs. Clinching and adhesive bonding are very suitable joining techniques for several material combinations, especially for thicknesses less than 3 mm.

AB - Adhesive bonding and mechanical joining techniques have developed rapidly in recent years and they have become more common joining techniques in sheet metal product industry. New joining techniques have become more popular because increasingly used precoated sheet materials are difficult to weld. New joining techniques can also be applied as well for precoated as for uncoated sheet metal materials. VTT Manufacturing Technology in cooperation with IVF has carried out a research project of flexible automation of joining techniques for sheet metals. The project consisted of flexible automation of mechanical joining and adhesive bonding of sheet metal parts. The joining techniques studied can be applied to supplement each other. The shape of a typical clinching tool is limiting the applications, because the tool must reach to both sides of the joint like in spot welding. Adhesive bonding without jigs can be used only for parts that are locking each other when joined. If no constructive locking appears the parts are kept steady in a jig or the parts are secured by clinching or riveting. The adhesive is also a sealing of the joint. The research equipment was developed and built in the laboratory of VTT, consisting of a robot with linear track, clinching equipment, adhesive bonding equipment, a flexible jig, a ventilation system and tables for loading and unloading of sheet metal parts. The demands for joint design and the economic effects of different joining techniques were studied. Five industrial case products were studied considering the utilization of clinching or adhesive bonding instead of spot welding or arc welding. The results of the studies show that clinching and adhesive bonding are possible to be automated flexibly. Existing sheet metal products usually need some re-design when a new joining method is applied. Sufficient joint strength for most sheet metal products can be produced by clinching or adhesive bonding. Joining costs depend very much on jig costs. Clinching reduces remarkably the lead time of adhesive bonded parts and reduces also jig costs. Clinching and adhesive bonding are very suitable joining techniques for several material combinations, especially for thicknesses less than 3 mm.

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KW - parts

KW - sheets

KW - adhesion

KW - clinching

KW - automation

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T3 - VTT Tiedotteita - Meddelanden - Research Notes

BT - Flexible automation of clinching and adhesive bonding of sheet metal parts

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CY - Espoo

ER -

Varis J, Penttilä R, Kujanpää V. Flexible automation of clinching and adhesive bonding of sheet metal parts. Espoo: VTT Technical Research Centre of Finland, 1995. 40 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1657).