1

Arndt Pohl Sales Manager

Phone: +49 6175 799-124 Mobil: +49 172 616 0219

E-Mail: arndt.pohl@PROFIL.eu

www.PROFIL.eu

Joining in Car Body Engineering 2012

Session VI:

New pierce nut for

hot-formed parts

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Agenda

1. The Company2. Advantages of Mechanical Fastening Technology3. Fasteners for hot-formed parts4. Tools and feed equipment for any production environment5. Reference

New pierce nut for hot-formed parts

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´65 First application of a Pierce Nut within a European OEM

´66/67 Access into the French and Italian Market

´85 Launch of the new Round Shoulder Fasteners like Rivet Nuts and Studs

´98 PROFIL Rivet Nuts become standardized within the European Automobile Industry

Headquarter Pressshop Distribution Center

PROFIL founded 1965, headquarter in Germany, Frankfort/MSubsidiary companies in USA, Italy, France, Spain, UK, Czech Republic and Poland. Cooperation with partners in Sweden, The Netherlands and China.

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Service and

Support

PROFIL develops and manufactures pierce nuts and studs, which are integrated in our customers stamping parts. As a system supplier we also design tools and automated feed equipment. We also offer customer specific solutions through collaboration, development, manufacturing and service.

Fastener Elements

ToolsCustomized Automated

Feeding

The System that Fastens

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Agenda

1. The Company2. Advantages of Mechanical Fastening Technology3. Fasteners for hot-formed parts4. Tools and feed equipment for any production environment5. Reference

New pierce nut for hot-formed parts

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Sheet Metal (1) + PROFIL Fastener Element (2) + Press Process (3) = Finished Part (4)!

1

4

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Value created in the press shop by elimination of subsequent process steps result in cost reduction.

Mechanical Fastening Technology – Ultimate Economic Efficiency

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Advantages of mechanically attached Fasteners

PROFIL fasteners are excellent in all types of modern sheet metal

Steel

High Strength Steel / hot-formed parts*

Sandwich-panels

Surface Coated Panels

Aluminium

Magnesium

Pre-painted Panels

PROFIL fastener benefits

High static and dynamic load

Precise positioning in sheet metal part

No functional impairment or damage to the microstructure of the panel or weld splatters

Stamping Operator capable quality checks

Gas and liquid tight joints possible

*Up to Rm = 1.500 MPa tensile strength, like 22MnB5

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1. The Company2. Advantages of Mechanical Fastening Technology3. Fasteners for hot-formed parts4. Tools and feed equipment for any production environment5. Reference

Agenda

New pierce nut for hot-formed parts

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Pierce Nut

Self Piercing

Sheet Metal

Die Button

Nut in Panel

F

Rivet Nut

Riveting

F

Clinching

Clinch Nut

F

Nut Installation Methods

High strength steel &

hot-formed part solutions

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Installation Method Rivet Nut (Typ RND)Direct clamping of the sheet metal between the Rivet

portion and the Flange of the Element.

Riveting Action: RND-Rivet Nut

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Torque Results in High Strengh Steel

Docol 1000 Nut: PC 8

Docol 1000 Nut: PC 10

DP600 Nut: PC 8

FEP04 Nut: PC 8

0 Nm

5 Nm

10 Nm

15 Nm

20 Nm

25 Nm

30 Nm

Sheet Metal Thickness = 1,8mmRivet Nut: RND0611, M6 Property Class 8 / 10

Acording to VDI 2230: 9.5 Nm is required

Torq

ueXm

in1. Pre-form 2. Piercing 3. Riveting

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Rivet Nut Type RSN1015, M6 in hot-formed parts

Torque [Nm]

0

10

20

30

40

50

60

70

PC 8 PC 10

Requirement for M6 Thread according to VDI 2230 = 9,5 Nm

Material: s=1,5mm 22MnB5

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Self-piercing nut „UMP8/33 M8“ PC 8 in hot-formed parts

0

1

2

3

4

5

6

7

0,7 1 1,25 1,35 1,5

Sheet Metal Thickness [mm]

FPush Out Force

Xmin [kN]

Notching effect

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New self piercing nut type „RSE“ for hot-formed parts (22MnB5)

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Influence of orientation by Resonance Tests (Force direction towards edge or flat side of the nut)

1.000

10.000

100.000

1.000 10.000 100.000 1.000.000 10.000.000

Anzahl Lastspiele n

Spitz

enkr

aft F

[N]

RSE08, 45° Messpunkt Bruch RSE08, 0° Messpunkt BruchRSE08, 45° Messpunkt Durchläufer RSE08, 0° Messpunkt DurchläuferRSE08, 45° Ausgleichsgerade RSE08, 0° Ausgleichsgerade

Mutter: Stanzmutter RSE08, 0°/RSE08, 45° Kl. 8Blech: USIBOR, 1,7 mmGegenblech: DC04, 5 mmSchraube: Flanschraube M8 Kl. 8.8Anzugsmoment: 24 NmKrafteinleitung: Spannfutter

Numbers of cycles

Nut: RSE M8 PC 8 direction 0°/45° Sheet Metal: 22MnB5/ 1,7 mm Screwed on Part : DC04, 5 mm Bolt: Flange Screw M8 PC 8.8 Clamping Torque : 24 Nm Application of Force: Chuck

Orientation of nut in the test

Endurance limit of 2 Mio cycles

13 kN

Fatigue break forcePe

ak F

orce

kN

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Force direction towards edge or flat side of the nutRSE orientation of 45°

RSE orientation of 0°

Crack stops prior to the nut pierced hole.

Cracks starts at the closest point of the sheet metal.

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Weld nut vs RSE self piercing nut in hot-formed parts

1.000

10.000

100.000

1.000 10.000 100.000 1.000.000 10.000.000

Anzahl Lastspiele n

Spitz

enkr

aft F

[N]

RSE08, 0°, 45° Messpunkt Bruch Schw eißmutter M8 Messpunkt Bruch

RSE08, 0°, 45° Messpunkt Durchläufer Schw eißmutter M8 Messpunkt Durchläufer

RSE08, 0°, 45° Ausgleichsgerade Schw eißmutter M8 Ausgleichsgerade

Mutter: StanzmutterRSE/Schw eißmutter M8, Kl. 8Blech: USIBOR, 1,7 mmGegenblech: DC04, 5 mmSchraube: Flanschraube M8 Kl. 8.8Anzugsmoment: 24 NmKrafteinleitung: Spannfutter

Numbers of cycles

RSE self piercing nut M8 Weld nut M8

Endurance limit of 2 Mio cycles

13 kN

5,3 kN

Fatigue break force

Peak

For

ce k

N

Nut: RSE M8 PC 8 Weld nut M8, PC 8

Sheet Metal: 22MnB5/ 1,7 mm Screwed on Part : DC04, 5 mm Bolt: Flange Screw M8 PC 8.8 Clamping Torque : 24 Nm Application of Force: Chuck

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Failure photos of weld nut and RSE nutWeld Nut M8

Crack starts in the center of the heat effected zone.

Crack stops prior to the nut pierced hole.

RSE self piercing nut M8

Cracks starts at the closest point of the sheet metal.

Crack runs across the hole sheet metal.

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Cutting Edge of RSE in hot-formed parts

Fracture Zone

Cutting Zone

Cutting edge from the RSE nut,

after the RSE nut has pierced the panel

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RSE self piercing vs Laser cut holes

1.000

10.000

100.000

1.000 10.000 100.000 1.000.000 10.000.000

Anzahl Lastspiele n

Spi

tzen

kraf

t F [N

]

RSE08, 0°, 45° Messpunkt Bruch REN08 vorgelocht Laser Messpunkt BruchRSE08, 0°, 45° Messpunkt Durchläufer REN08 vorgelocht Laser Messpunkt DurchläuferRSE08, 0°, 45° Ausgleichsgerade REN08 vorgelocht Laser Ausgleichsgerade

Mutter: Stanzmutter RSE08, selbststanzend/Montageloch mit Laser, Kl. 8Blech: USIBOR, 1,7 mmGegenblech: DC04, 5 mmSchraube: Flanschraube M8 Kl. 8.8Anzugsmoment: 24 NmKrafteinleitung: Spannfutter

Number of cycles Endurance limit of 2 Mio cycles

13 kN

10 kN

Fatigue break force

Peak

For

ce k

N Nut: RSE M8 PC 8 self pierced RSE M8 PC 8 clinched into Laser cut holes

Sheet Metal: 22MnB5/ 1,7 mm Screwed on Part : DC04, 5 mm Bolt: Flange Screw M8 PC 8.8 Clamping Torque : 24 Nm Application of Force: Chuck

RSE self piercing nut RSE clinched into Laser cut hole

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Results of Laser-cutting vs self-piercing

RSE self piercing

RSE clinched into a Laser cut hole

Cracks starts at the closest point of the sheet metal. Crack stops prior to the nut pierced hole.

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Torque and push out force of RSE

3,766 kN

F [kN]Nut Type RSE M8Tempered 290 – 310

HVMaterial 22MNB5thikness 1,7mm

1 4,2292 3,9603 4,1654 4,5645 4,0716 3,7667 3,8948 4,1279 4,055

10 3,972X min 3,766

X midle 4,080X max 4,564

Torque Tests: >70Nm thread distroyed due to form fitted function

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Wear test of die buttons under production conditions

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Pierce Stud

Panel

Die-Button

Rivet Stud Clinch Stud

Self-Piercing Riveting Clinching

Fastener inPanel

Stud Installation MethodsStud solutions

for hot-formed parts

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Sheet Metal Thickness: 0,8/1,0/1,25/1,35/1,5 mm

Rivet Bolt: NBR0616 (M6) PC 10.9 F

VDI 2230 requires 9.5 Nm All bolt shafts are sheared off!

Torque results in 22MnB5

0

5

10

15

20

25

30

35

40

45

0,8 1 1,25 1,35 1,5

Sheet Metal Thickness [mm]

Torq

ue[N

m]

MinMittelwertMaxStdAbw

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Rivet bolt push out force in 22MnB5

F

Push Out Force [kN]

Sheet Metal Thickness: 0,8/1,0/1,25/1,35/1,5 mm

Rivet Bolt: NBR0616 (M6) PC 10.9

0

2

4

6

8

10

12

14

0,8 1 1,25 1,35 1,5

Sheet Metal Thickness [mm]

Forc

e [k

N]

Min

Mittelw ert

Max

StdAbw

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Agenda

1. The Company2. Advantages of Mechanical Fastening Technology3. Fasteners for hot-formed parts4. Tools and feed equipment for any production environment5. Reference

New pierce nut for hot-formed parts

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Manual insertion procedure As a low-cost method for limited series, single parts and prototypes

Fully automatic placement utilizing installation tools, automatic presses Very economical for mass production

Robot-controlled placement during final assemblyIdeal for large pre-formed metal pieces and component parts with fastener elements assembled in different planes

Tooling equipment for the most efficient way

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Agenda1. The Company2. Advantages of Mechanical Fastening Technology3. Fasteners for hot-formed parts4. Tools and feed equipment for any production environment5. Reference

New pierce nut for hot-formed parts

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Seat Rail from DP 800 with In Press Bolts Typ EBF0822 - M8

Side Impact Beams from Martensitic Steel 1200, s = 1,5 (Rm 1200 MPa), 4 Rivet Nuts Type RND0813 Kl.10 installed in a Transfer Press Fully Automatically controlled and Timed with the Stroke of the Press.

Fasteners in High Strength Steel

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Typical Applications for Mechanically Joined Fasteners

Seats

Hinges

Ball Pins

Instrument Panels

Module Plates / Fire Walls

Door Cross Members

Doors

Bodyshell and Add on Parts

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Applications:

Advantages of PROFIL Fasteners in hot-formed parts

• Cost effective solutions

• Extremely high reliable process

• No functional impairment or damage to the microstructure of the panel or weld splatters

• High static and dynamic load of the fastening.

• Fully automated Presswork or Body in White Shop

• Semi automated or manual processing

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Thank you very much for your attention!

I would be pleased to see you at our booth at the exhibitors

forum!