01 - 50 - 912 - - b

STANDARD

Classement prvu : 01 - 50 - 912 / - - B Sce N Tl

Responsable du document P. SCHWARTZ 65810 53130

Pilote(s) technique(s) A. LANNE 65304

Date de mise jour :

Normalisation Renault Automobiles

01 - 50 - 912 / - - B

ELECTRIC RESISTANCE

LAP SPOT WELDING

(FOR NEW DESIGNS))

Service 65810Section Normes et Cahiers des Charges

S

R

VISA RESPONSABLE(S)

SIGNATURE :

NOM :SERVICE :DATE :

15/01/2002

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RENAULT 2002 Page 2/27

This document is to be considered as a whole, the parts of which shall not be separated.

"Seul le texte franais fait foi, les traductions n'tant faites que pour en faciliter l'emploi"."The French text alone is valid. The translations are provided to assist the reader in understanding thestandards".

RENAULT 2002.No duplication permitted without the consent of the issuing department.No circulation permitted without the consent of RENAULT.

DATE OF ISSUE

April 1994 - - - This issue originates from Draft NC 92 425 / - - D.

REVISIONS

March 2001 - - A Annex 3 modified.This issue originates from Draft NC 2001 0038 / - - -.

March 2002 - - B Complete revision.This issue originates from Draft NC 2001 0938 / - - A.

REFERENCED DOCUMENTS

Standards : 00-10-040, 01-50-902.Product Specifications : 32-00-017.

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CONTENTS

Page

1. GENERAL 5

1.1. VARIOUS SPOT WELDING PROCESSES 6

1.2. SPOT WELDING PROCESS 7

1.3. DESCRIPTION OF SPOT WELDED JOINTS - TERMINOLOGY 7

2. SCOPE 8

3. TYPES OF ASSEMBLIES 9

3.1. TWO-SHEET ASSEMBLY 9

3.2. THREE-SHEET ASSEMBLY 9

3.3. SPECIAL ASSEMBLIES 9

3.4. VALIDATION OF ASSEMBLIES 9

4. DEFINITION OF WELDING SPOTS AND WELDING SPOT AREAS 10

4.1. WELDING SPOT CATEGORIES 10

4.2. WELDING SPOT AREAS 10

4.3. TIME LIMIT FOR CHARACTERISTIC DEFINITION 10

4.4. POSITION 11

5. STANDARDISED REPRESENTATION 11

6. APPEARANCE OF WELDING SPOTS 12

6.1. APPEARANCE A 12

6.2. APPEARANCE B 12

6.3. APPEARANCE C 12

6.4. IDENTIFICATION 12

7. APPEARANCE WELDING SPOT SPECIFICATION 12

8. WELDABILITY OF METALS 12

9. DIMENSIONAL AND MECHANICAL CHARACTERISTICS OF WELDING SPOTS 12

10. OVERLAP DIMENSION "L" (OR EDGE WIDTH) AND AXIS POSITION FOR WELDING SPOT"A" (SEE ANNEX 5) 13

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CONTENTS (continued)

Page

11. MINIMUM WELD PITCH (CENTRE DISTANCE): P MIN. (SEE ANNEX 4) 13

ANNEX 1 ASSEMBLY REQUIREMENTS 14

ANNEX 2 WELDABILITY OF 3 THICKNESS - 2 JOINT TYPE ASSEMBLY 15

ANNEX 3 DIMENSIONAL AND MECHANICAL CHARACTERISTICS 18

ANNEX 4 MINIMUM PITCH (P min.) BETWEEN WELDING SPOTS (CENTRE DISTANCE) 21

ANNEX 5 OVERLAPPING DIMENSIONS "L" - AXIS POSITION FOR WELDING SPOTS "A" 23

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1. GENERAL

Spot welding consists in making an overlapping assembly with one or two unions at one or severalpoints.

The welding spot is a disk of melted, then solidified, metal which forms the union between the parts ofan overlapping assembly.

Spot welding machines which are used to simultaneously make several welding spots are called"multi-spot welding machines".

Spot welding machines may be fixed or mobile. In the latter case, they are called "welding guns"because of their special shape.

The assemblies produced in this way may consist of two or three sheets; the thicknesses of thesheets forming these assemblies may be different.

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1.1. VARIOUS SPOT WELDING PROCESSES

PROCESSES EQUIPMENT REMARKS

Single directspot welding

Double seriesspot welding

Indirect spotwelding

"Push-pull"welding

Seamwelding

Disk depressionwelding

* Manual guns* Multi-spot (S.P.M.)* "Robot" guns

* Multi-spot (S.P.M.)



* Manual contact rollers

* Machines

* Welding press

- A single spot per cycle- The tool should have accessto either side of the assembly- Possible welding of 2 and 3 thicknesses- Spot qualityUse recommended- 2 spots per cycle- Tool on one side only- No bottom imprint- Welding of 2 compatiblethicknesses only- Limited quality weldingspotsUse taking special care- 1 welding spot per cycle- Tool on one side only- No bottom imprint- Limited welding spot quality- Welding of 2 thicknessesonlyUse taking special care

- 2 welding spots per cycle- Perfectly symmetrical tools on either side of the assembly- Quality welding in the centre of large parts

- Welding spots correctly spaced, or secant spots (tight weld seams)- Welding of 2 thicknesses only

- Making of several welding spots/cycle.- Welding of small parts (clamps, nuts, screws, etc.)- High power machines

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1.2. SPOT WELDING PROCESS

During spot welding, the parts are superimposed, and welding is limited to one or more spots.Electrodes localising the force and welding current are used.

When the required clamping force is reached at the electrodes, the electric current flows. The areascorresponding approximately to the active surface area of the electrodes are heated when the currentflows through the sheets. The heating is mostly localised at the contact surfaces of the sheets. Thecombined effect of the force and heating causes the creation of a weld seam jointing the sheetsThis technique mainly applies to the welding of fine steel or light alloy sheets of thicknessesbetween 0,5 mm and 5 mm.

Spot welding may be used for uncoated, galvanised, or electrozinc-coated steel sheets. These sheetsmay consist of mild steel or steel with a high yield strength. However, the welding conditions vary forthe various materials and for the zinc-coated and uncoated sheets.

1.3. DESCRIPTION OF SPOT WELDED JOINTS - TERMINOLOGY

Welding spot area : all the spots which provide the same function.

Indentation : mark left by the electrode on the part surface.

Indentation depth : depth of the mark left by the electrode on the part surface during welding.

Weld core : disk of melted and cooled metal ensuring continuity between the sheets.

Material rivet (or button) : part of sheet remaining on one of the parts after a destructive test.

Transformer, primary circuit winding

Thyristorcontactor

Magnetic coreof transformer

Transformer,secondary circuitwinding

Switch

Schematic representation of spot welding process

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Material rivet diameter : the mechanical strength of a welding spot is characterised by the diameter ofthe material rivet or of the area pulled out (d) at the interface after the sheet separation test. Themeasurements can be made at the base of the material rivet. If the material rivet is asymmetrical, themeasurements are made from the direction giving the lowest value.

Definition of material rivet diameter

Good welding spot : welding spot checked with sheet separation, or another similar method with adiameter of the material rivet or area pulled off at the interface equal to or greater than the specifieddiameter.

Defective welding spot : welding spot checked with sheet separation, or another similar method with adiameter which is less than the specified diameter.Any missing point is considered as a defective welding spot.

Welding spot with edge position defect : welding spot causing deformation of the sheet. See figurebelow.

Definition of an edge position defect

2. SCOPE

This document relates to the spot welding of extra mild steel high yield strength sheets (uncoated,electro-zinc coated, and galvanised); their mechanical characteristics may differ depending on theapplication. Any other steel grade shall be the subject of special specifications.This standard is intended to define :

a) the types of assemblies,b) the standardised representation of weld areas and of the corresponding welding spots,c) the categories of welding spots and weld areas,d) the appearance of the welding spots,e) the relationships between the appearance and the location of the welding spots,f) the dimensional and mechanical characteristics of the welding spots.NOTE: Sub-paragraphs c), d), e) and f) are the controlling factors for the welding equipment

(making of direct or indirect welding spots, welding current value, current flow time,electrode tip dimensions, coupling time, holding time) and the inspection procedures to beimplemented.

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3. TYPES OF ASSEMBLIES

A minimum of 2 welding spots is required to assemble a part.

3.1. TWO-SHEET ASSEMBLY

Each two-sheet assembly shall satisfy the requirements of annex 1.

3.2. THREE-SHEET ASSEMBLY

For a three-sheet assembly, and if it appears in the configurations grouped in annex 2, this assemblyshould be considered as an assembly which can be produced industrially.

However, the welding spots which should be specified as category 1 shall be the subject of writtenapproval from the "Welding Process Engineering" Department.

3.3. SPECIAL ASSEMBLIES

a) Each two-sheet assembly which does not meet the requirements of annex 1 shall be the subjectof approval from the "Welding Process Engineering" Department.

b) For three-sheet assemblies which are not part of the configurations of annex 2, it is possible tospecify assemblies of 3 thicknesses and 1 joint with the approval of the "Welding ProcessEngineering" Department.

3-sheet assemblies and 1 joint shall be the subject of a written indication on the EngineeringCentre (B.E.) drawing derived from the digitisation of the "Welding Spots". The indication of thejoint to be made is entered in the welding spot list.In addition, all exemptions relating to a welding drawing shall be the subject of a "WeldingProcess Engineering" Department summarising memorandum.

c) Generally, for any sheet assembly not covered by the specifications of annexes 1 and 2; it ispossible, with the approval of the "Welding Process Engineering" Department, to specify weldcores of reduced diameter with respect to those of annex 3; the values are then entered on thewelding drawing.

These assemblies shall be limited to exceptional cases.

3.4. VALIDATION OF ASSEMBLIES

- Validate the feasibility of special assemblies ( 3.3.).- On the prototype, validate the minimum guaranteed assembly quality (mechanical strength).

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4. DEFINITION OF WELDING SPOTS AND WELDING SPOT AREAS

The minimum guaranteed quality level is given in Product Specifications 32-00-017.

4.1. WELDING SPOT CATEGORIES

The welding spot category is defined by the Engineering Centre according to their function; thewelding spots are distributed into two categories:

CATEGORY 1: spots, the mechanical strength of which is preponderant (requiring filling accordingto Standard 00-10-415). These welding spots belong to areas providing an importantresistance or safety-critical function.

CATEGORY 2: other welding spots..

4.2. WELDING SPOT AREAS

The welding spots, which are derived from the "Welding Spots" data base, are defined on the weldingdrawings by the Engineering Centre.

The Engineering Centre and the "Welding Process Engineering" Department jointly divide the vehicleinto areas of spots. These areas are groups of welding spots performing the same product function(Customer Performance).

4 EXAMPLES OF WELDING SPOT AREAS ON A SUBFRAME

The areas contain in the order of 10 to 60 resistance welded spots.

The allocation of the spots within the areas is given in the list associated with the welding drawing.

If several versions of a vehicle are examined (B, C, J, etc.), only identical areas (identical number ofwelding spots and same tolerances, etc.) keep the same number. Otherwise, the areas have differentnumbers, which indicates that a welding spot can belong to several areas only on different versions.

4.3. TIME LIMIT FOR CHARACTERISTIC DEFINITION

The categories of the welding spots and the welding spot areas shall be defined with the first changeletter of the welding drawing.

Area 203 Area 227 Area 120 Area 222

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4.4. POSITION

The theoretical position of the welding spots is defined by the Engineering Centre.

The drawing of the Engineering Centre is the sole reference.

In addition, the Engineering Centre shall give the tolerances on the welding spot positions inagreement with the "Welding Process Engineering" Department if the general tolerances indicated inProduct Specifications 32-00-017 are unsuitable.

5. STANDARDISED REPRESENTATION

The representation of line or staggered spot welding calls for a longitudinal view or an edge-on view,accompanied by an end view or cutaway view:

- the line of welding spots on the longitudinal view is materialised by a mixed medium thickness line;

- upright projection:. for category 1 welding spots, the location of the welding spots is indicated by symbol for

a joint, or for two joints, and is defined according to the general dimensioning rules,. for category 2 welding spots, the location of the welding spots is indicated by symbol

for a joint, or symbol for two joints, and is defined according to the general dimensioningrules.

- cutaway view: all the joints are represented by symbol .If there are many welding spots in line, it is only necessary to represent 2 or 3 spots at the ends of thisline.

NOTE: Safety-critical and/or regulation-controlled areas shall be defined and identified by symbol in compliance with Standard 00-10-040.

- Designation to be entered on the drawing (or on AO sheet) (to be applied as cross-reference):11 SRP 30

. number of spots

. welding process code

. welding spot pitch (mm)Special spots are identified by symbol *. This cross-refers to the list.

The special welding spots are:

- the process engineering spot,

- the favoured joint,- the spot under flexible joint,- small core spot,

- etc..

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6. APPEARANCE OF WELDING SPOTS

6.1. APPEARANCE A

This appearance is incompatible with the requirements of CATEGORY 1, with three-thicknessassemblies, and with externally-coated sheet assemblies.

This appearance is retained only for CATEGORY 2 welding spots. The appearance which isdemanded for the visible part of welding spots located on visible sides, and for which no marking ispermitted, is defined in this way.

6.2. APPEARANCE B

The appearance which is demanded for welding spots located on surfaces visible only when thedoors, luggage compartment door, etc. are open is defined in this way. Electrode indentations ofdepth equal to or less than 0,1 mm are allowed. But the welding spots shall be perfectly positioned inall the cases.

In addition to the characteristics defined above, the welding areas shall be free of scale, grease,oxidation, and burrs.

6.3. APPEARANCE C

This appearance shall satisfy the requirements of Product Specifications 32-00-017.

6.4. IDENTIFICATION

Welding spots of appearance A and B are identified on the drawings (spots of appearance C are notidentified).

7. APPEARANCE WELDING SPOT SPECIFICATION

The Engineering Centre specifies the appearance welding spots after acceptance by the QualityDepartment (Department 0611) of representative samples produced by the "Welding ProcessEngineering" Department (samples before and after painting), prior to the making of tooling.

8. WELDABILITY OF METALS

Refer to Standard 01-50-902.

9. DIMENSIONAL AND MECHANICAL CHARACTERISTICS OF WELDING SPOTS

A table in annex 3 specifies the minimum guaranteed diameter for welding spots depending on thethickness of the chosen sheets and mechanical strength.

Diameter Dt is the minimum guaranteed theoretical diameter of the welding spot.

11 SRP 30 appearance B

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10. OVERLAP DIMENSION "L" (OR EDGE WIDTH) AND AXIS POSITION FOR WELDING SPOT "A"(SEE ANNEX 5)

The values for L are defined in annex 5.

The axis position for the welding spot "A" with respect to the edge of the sheet is defined in annex 5.

A AA

A A A

11. MINIMUM WELD PITCH (CENTRE DISTANCE): P MIN. (SEE ANNEX 4)

The values which are indicated for P are those which do not require any special precautions tocompensate for current drifts by adjacent spots.Two nominal values are suggested depending on the number of sheets forming the assembly.

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ANNEX 1ASSEMBLY REQUIREMENTS

ASSEMBLYTYPES

Maxthickness

Minthickness

.

.

CATEGORY 1 CATEGORY 2 CONDITIONS

2 thicknesses1 union

e

E 3 X X

3 thicknesses2 unions

Seeannexes3 and 4

Consult"WeldingProcess

Engineering"Department

XElectrode/electrodedirect spot welding

3 thicknesses1 union





XElectrode/electrodedirect spot welding

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ANNEX 2WELDABILITY OF 3 THICKNESS - 2 JOINT TYPE ASSEMBLY

AXY

Assembly to be excluded

X

A Yfrom 0,4 to 0,54from 0,55 to 0,64from 0,65 to 0,74

from 0,4 to 0,54 from 0,75 to 0,84from 0,85 to 0,94from 0,95 to 1,09from 1,1 to 1,19from 0,4 to 0,54from 0,55 to 0,64from 0,65 to 0,74

from 0,54 to0,64

from 0,75 to 0,84

from 0,85 to 0,94from 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29from 0,4 to 0,54from 0,55 to 0,64from 0,65 to 0,74

from 0,65 to0,74

from 0,75 to 0,84

from 0,85 to 0,94from 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29from 0,4 to 0,54from 0,55 to 0,64from 0,65 to 0,74from 0,75 to 0,84

from 0,75 to0,84

from 0,85 to 0,94

from 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49from 0,4 to 0,54from 0,55 to 0,64from 0,65 to 0,74from 0,75 to 0,84

from 0,85 to0,94

from 0,85 to 0,94

from 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49from 1,5 to 1,69

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ANNEX 2 (Continued)X

A Yfrom 0,4 to 0,54from 0,55 to 0,64from 0,65 to 0,74from 0,75 to 0,84from 0,85 to 0,94

from 0,95 to1,09

from 0,95 to 1,09

from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49from 1,5 to 1,69from 1,7 to 1,89from 0,4 to 0,54from 0,55 to 0,64from 0,65 to 0,74from 0,75 to 0,84from 0,85 to 0,94

from 1,1 to 1,19 from 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49from 1,5 to 1,69from 1,7 to 1,89from 1,9 to 2,09from 0,55 to 0,64from 0,65 to 0,74from 0,75 to 0,84from 0,85 to 0,94from 0,95 to 1,09

from 1,2 to 1,29 from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49from 1,5 to 1,69from 1,7 to 1,89from 1,9 to 2,09from 2,1 to 2,19from 0,75 to 0,84from 0,85 to 0,94from 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29

from 1,3 to 1,49 from 1,3 to 1,49from 1,5 to 1,69from 1,7 to 1,89from 1,9 to 2,09from 2,1 to 2,19from 2,2 to 2,29from 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49

from 1,5 to 1,69 from 1,5 to 1,69from 1,7 to 1,89from 1,9 to 2,09from 2,1 to 2,19from 2,2 to 2,29

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ANNEX 2 (Continued)

X

A Yfrom 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49

from 1,7 to 1,89 from 1,5 to 1,69from 1,7 to 1,89from 1,9 to 2,09from 2,1 to 2,19from 2,2 to 2,39from 0,95 to 1,09from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49

from 1,9 to 2,09 from 1,5 to 1,69from 1,7 to 1,89from 1,9 to 2,09from 2,1 to 2,19from 2,2 to 2,39from 1,1 to 1,19from 1,2 to 1,29from 1,3 to 1,49from 1,5 to 1,69

from 2,1 to 2,29 from 1,7 to 1,89from 1,9 to 2,09from 2,1 to 2,29from 2,3 to 2,49from 2,5 to 2,69

from 2,7 to 3from 1,2 to 1,29from 1,3 to 1,49from 1,5 to 1,69from 1,7 to 1,89

from 2,3 to 2,49 from 1,9 to 2,09from 2,1 to 2,29from 2,3 to 2,49from 2,5 to 2,69

from 2,7 to 3from 1,3 to 1,49from 1,5 to 1,69from 1,7 to 1,89

from 2,5 to 2,69 from 1,9 to 2,09from 2,1 to 2,29from 2,3 to 2,49from 2,5 to 2,69

from 2,7 to 3from 1,5 to 1,69from 1,7 to 1,89from 1,9 to 2,09

from 2,7 to 3 from 2,1 to 2,29from 2,3 to 2,49from 2,5 to 2,69

from 2,7 to 3

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ANNEX 3DIMENSIONAL AND MECHANICAL CHARACTERISTICS

1. DEFINITION OF THE REFERENCE THICKNESS FOR AN ASSEMBLY: ER (mm)The reference thickness for an assembly (ER) is the parameter which makes it possible to determinethe nominal value of the Dt for a welding spot. It is determined according to the following rules.

1.1. Case of a two-thickness assembly

ER(mm) = finest value for the thickness of the assembly sheets.

Possible cases Assembly profile example ER

Sheets with the samethicknesses A

BA = B ER = A

Sheets with differentthicknesses. A

B A

Bor B > A

ER = Afinest thickness

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ANNEX 3 (Continued)1.2. Case of a three-thickness assembly

1.2.1. General caseThe characteristics of the two melted cores, one for the (Sheet1-Sheet2) connection, and one for the(Sheet 2-Sheet 3) connection should be determined. Therefore, there are two reference thicknessesto be determined (ER1 and ER2).

Sheet No1

Sheet No 2

Sheet No 3

1st melted core (Sheet1-Sheet2connection)

2nd melted core (Sheet2-Sheet3connection)

The definition of the reference thickness is identical: ER(mm) = finest value of the assembly sheetthickness.

1.2.2. ER value examples for different three-thickness assembly typesThis table does not describe all the possible cases; it is only intended to illustrate a few significantexamples.

Possible cases Example of possible profiles for the assembly ER

Sheets with thesame thicknesses

Core No 1 (ER1)

Core No 2 (ER2)

Thickness ofsheet No 1 = A

Thickness ofsheet No 2 = B

Thickness ofsheet No 3 = C

A = B = C ER1 = ER2 =A

Two sheets withthe same

thicknesses; thirdsheet with a finer

thickness(differentstacking)

Core No 1 (ER1)

Core No 2 (ER2)




A = B

C < A = BER1 = B

ER2 = C

All sheets withdifferent

thicknesses.

Core No 1 (ER1)

Core No 2 (ER2)




A < B < CER1 = A

ER2 = B

Sheets withdifferent

thicknesses butfinest sheet in the

middle of theassembly.

Core (ER)




A/B 3and

C/B 3

ER = finest sheetbetween the twoexternal sheets,

that is to say C A

Trf = Athinnest

thickness

1.2. Case of a three-thickness assembly

Trf = Average thickness of assembly sheet + 0,2 mm.

AB A = B = C

C > A > B

A + 0,2

Trf

C

ABC

A + 0,2

ABC

B > C > A C + 0,2

ABC

C > B > A B + 0,2

ABC

A = C > B A + 0,2

ABC

B = C > A B + 0,2

Trf

ABC

A = C < B A + 0,2

A = B < C A + 0,2ABC

NOTE: The definition of the reference thickness "Trf" above is also used to determine theoverlapping dimensions and welding parameters.

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ANNEX 4 (Continued)2. MINIMUM VALUES OF THE PITCH BETWEEN SPOTS

Reference thickness ofassembly (in mm)

Minimum pitch betweenwelding spots (in mm)

Minimum pitch betweenwelding spots (in mm)

(Trf) Two-thickness assemblies Three-thickness assemblies0,4 10 14

0,5 10 14

0,55 10 14

0,6 10 14

0,65 11 15

0,7 11 15

0,75 12 17

0,8 13 18

0,85 15 20

0,9 17 22

0,95 19 23

1 20 24

1,1 20 24

1,2 22 26

1,3 23 27

1,4 23 27

1,5 24 29

1,6 26 30

1,7 26 30

1,8 28 32

1,9 30 34

2 32 36

2,2 35 39

2,5 39 43

2,8 41 45

3 43 48

Any deviation with respect to this table shall be the subject of a written agreement between theEngineering Centre, the "Welding Process Engineering" Department, and the "Project" team.

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ANNEX 5OVERLAPPING DIMENSIONS "L" - AXIS POSITION FOR WELDING SPOTS "A"

Account shall be taken in the sheet edge dimensions of the product requirements (thicknesses,stamping depths, lengths of cut-off edges) and also of the process requirements (stamping or foldingradiuses R, clearance angle , diameter of electrode cylinder, positioning dispersions, sheet trimmingdispersions, etc.).

1. GENERAL CASE (except door sills, opening panels, window pillars)The values below are standard "across flats" values measured on the sheet which mostly standsback; they apply in most assembly cases, except for door sills, window pillars, and opening panels.

Hypotheses for the definition of L:

- the assemblies with two parts each with an angle of 90 are not concerned;

- dimensioning with robot electrodes complying with EM34.SO.122. Matching is: centred straightelectrode with centred straight electrode. Average electrode wear estimate: 5mm;

- taking into account of the dispersions obtained from the trimming, assembly, and electrode/sheetpositioning tolerances;

- the reference thickness is determined according to the number of assembled sheets and stackingcase in accordance with annex 4.

Values for L and A:

Thickness ofreference sheet

(according toannex 4)

L across flats

(mm)

A

(mm)0,6 to 0,8 13 (1) 6,50,81 to 1,2 15 (1) 7,51,21 to 2 18,6 9,32,1 to 3 21,6 10,83,1 to 4 25,6 12,8

(1): Since this "standard" value highly depends on radius R and angle , the value L should thereforebe adapted according to them (see table below).

A

L

R

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ANNEX 5 (Continued)

Thickness of reference sheet: 0,6 to 0,8 mmWelding spot axis position (A: 6,5 mm

R/ 90 94 98 102 106 110 114 118 120 1242 17,5 17 16,5 16 15,5 15 14,5 14 13,5 13

4 15,5 15 14,5 14 13,5 13 13 13 13 13

6 13,5 13 13 13 13 13 13 13 13 13

Thickness of reference sheet: 0,81 to 1,2 mmWelding spot axis position (A): 7,5 mm

R/ 90 94 98 102 106 110 114 1182 18,5 18 17,5 17 16,5 16 15,5 15

4 16,5 16 15,5 15 15 15 15 15

6 15 15 15 15 15 15 15 15

NOTE: The values for L which are defined apply by default for assemblies made with a manualprocess.

Any deviation concerning these values (decrease or increase) shall be set in consultation with theEngineering Centre, the "Welding Process Engineering" Department, and the project team. It can onlybe granted on a case-by-case basis and after giving an indication of the technical and economicaleffects.

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ANNEX 5 (Continued)2. SPECIAL CASE: Door sills, window pillars, window frames

Since the following typical sections are the subject of design/vision requirements, they are specificallytreated as indicated below.

2.1. Window rabbet edge widths (pillars)Construction hypotheses:

- sheet/electrode dispersion: 2 mm,

- assembly and cutting dispersion: 2 mm,

- radius tolerance: 1 mm,

- Electrode matching: centred straight/out of centre straight (cylinder 20 mm / end piece 14 mmaccording to EM34.SO.122).

R

7

L

> 1790R=3 + 1

Body side

Roof drip moulding orfront pillar reinforcement

Window pillarinner panel

Window pillar inner panel edge width: in conformity with this drawing, with L across flats > 14 mmand R = 3 mm + 1 mm

Body side edge width L: in accordance with general case ( 1.)

Any deviation concerning these values (decrease or increase) shall be set in consultation with theEngineering Centre, the "Welding Process Engineering" Department, and the project team. It can onlybe granted on a case-by-case basis after giving an indication of the technical and economical effects.

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ANNEX 5 (Continued)2.2. Door sill rabbet edge widths

Construction hypotheses:

- sheet/electrode dispersion: 2 mm,

- assembly and cutting dispersion: 2 mm,

- radius tolerance: 1 mm,

- Electrode matching: centred straight/out of centre straight (cylinder 20 mm / end piece 14 mmaccording to EM34.SO.122).

L cc

R

2Reinforcements (CdC pillars, ...)Side sill inner panel

Inner panels (CdC pillars, ...)Side sill closingelement

Body side (CdC)

cc

9Rd

L

cc 100 105 110Lcc > 18,2 mm 17,9 mm 17,5 mm

Body side edge width:

(Body side radius R = 5 mm)

Closing element or inner paneledge width: L across flats in conformity with thegeneral case

Any deviation concerning these values (decrease or increase) shall be set in consultation with theEngineering Centre, the "Welding Process Engineering" Department, and the project team. It can onlybe granted on a case-by-case basis after giving an indication of the technical and economical effects.

RENAULT 01 - 50 - 912 / - - B


ANNEX 5 (Continued)2.3. Window frame edge widths

Hypotheses: the value defined below requires the use of special electrodes involving processrequirements (limited useful life, limitation of the number of spots) which will have to bevalidated and accepted in consultation with the Engineering Centre, the "WeldingProcess Engineering" Department, and the project team.

L

L

L = 9,7 mm + 0,5 mm

Any deviation concerning these values (decrease or increase) shall be set in consultation with theEngineering Centre, the "Welding Process Engineering" Department, and the project team. It can onlybe granted on a case-by-case basis and after giving an indication of the technical and economicaleffects.

01 - 50 - 912 - - b

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