沃尔沃标准VCS 5026,4

STANDARD VCS 5026,4

Volvo Car Corporation

Established Date: Issue: Page: 2016-04 3 1(15)

The English language version is the original and the reference in case of dispute. Den engelska spr?kversionen ?r originalversion och ska ?beropas i h?ndelse av tvist.

Master location system Referenspunktsystem System description and indication Systembeskrivning och skrivs?tt Orientation Orientering

The standard is based on rules for datum targets, as described in ISO 1101 and ASME Y14.5, and is a further development of these rules to meet the needs in connection with positioning and specification of requirements for parts in a vehicle coordinate system. Standarden ?r baserad p? regler f?r lokala referenser i ISO 1101 och ASME Y14.5 och ?r en vidareutveckling av dessa f?r att tillgodose behoven av positionering och kravs?ttning av artiklar i ett vagnskoordinatsystem.

Former practice is described in VCS 5026,29 Master location system. Tidigare praxis beskrivs i VCS 5026,29 Referens-punktsystemet.

This issue differs from issue 2 in that the term “interface system” has been changed to “subordinate system”. Denna utg?va skiljer sig fr?n utg?va 2 genom att ben?mningen ”interface-system” ?ndrats till

”delsystem”.

Contents Inneh?ll

1 Scope and field of application 1 Omfattning och till?mpning

2 The 3-2-1 rule 2 3-2-1-regeln

3 Symbols and indication 3 Symboler och skrivs?tt

4 Description of system 4 Systembeskrivning

5 Selection of master location and support

location points

5 Val av referens- och st?dpunkter

6 Reference in design-engineering

documentation 6 H?nvisning i konstruktionsteknisk

documentation

1 Scope and field of application 1 Omfattning och till?mpning

The system with master location points in accordance with this standard is intended to be applied in order to obtain an effective determination of the position of parts in the vehicle’s coordinate system. It is based on the same – systematically and consistently placed –initial positions being applied throughout the entire production process, that is, in design, production and inspection. Systemet med referenspunkter enligt denna standard ?r avsett att till?mpas f?r en effektiv positionsbest?mning av artiklar i fordonets koordinatsystem. Det bygger p? att samma

utg?ngsl?gen, systematiskt och konsekvent place-rade, till?mpas genom hela framtagningsprocessen, d.v.s. vid konstruktion, produktion och kontroll.

2 The 3-2-1-rule 2 3-2-1-regeln

In order for a part (rigid) to be unambiguously located, it must be determined by six master F?r att en artikel (stel) ska vara entydigt lokaliserad m?ste den vara best?md av sex referenspunkter

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location points distributed with 3, 2 and 1 point, respectively, in three coordinate planes perpendicular to each other. f?rdelade p? 3, 2 och 1 punkter, i tre mot varandra vinkelr?ta koordinatplan.

It is not necessary to have all master location points having the same direction in the same coordinate plane since the 3-2-1 distribution in the three different coordinate directions still permits the creation of a three-plane coordinate system for the part. Det ?r inte n?dv?ndigt att ha alla referenspunkter i en riktning i samma koordinatplan d? f?rdelningen 3-2-1 i de tre olika koordinatriktningarna ?nd? medger bildandet av ett treplans koordinatsystem f?r artikeln.

Figure 1 below illustrates examples of the 3-2-1

rule.

I figur 1 nedan visas exempel p? 3-2-1-regeln.

X

c)

Fig. 1 Examples of the 3-2-1 rule:

a) guides the part on six surfaces

b) guides the part in a locating hole, a

slotted hole and three surfaces

c) same as b) with symbols in

accordance with this standard

Fig. 1 Exempel p? 3-2-1-regeln:

a) styr artikeln p? sex ytor

b) styr artikeln i ett styrh?l, ett avl?ngt h?l

och tre ytor

c) samma som b) med angivningssymboler

enligt denna standard

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3 Symbols and indication

3 Symboler och skrivs?tt

= Master location point / Referenspunkt

3.1 Indication

3.1 Skrivs?tt

In the lower section of the circle, the coordinate direction and the sequence number of the master location point shall be indicated. Numbers 1–3 shall be given for the coordinate direction with three master location points, numbers 4–5 shall be indicated for the coordinate direction with two master location points and number 6 for the coordinate direction with one master location point. See figure 1.

I cirkelns nedre del anges koordinatriktningen och ordningsnummer f?r referenspunkten. Nummer 1–3 anges f?r koordinatriktningen med tre referenspunkter, nummer 4–5 anges f?r

koordinatriktningen med tv? referenspunkter och nummer 6 f?r koordinatriktningen med en referenspunkt. Se figur 1.

In the upper section of the circle, the size of the surface used when the master location point is placed on a surface shall be indicated. Se figure 2. I cirkelns ?vre del anges storleken p? ytan som anv?nds d? referenspunkten ?r placerad p? en yta. Se figur 2.

A dashed line from the symbol to the master location point indicates that the datum is on the other side of the material. See figure 3. En streckad linje fr?n symbolen till referens-punkten anger att referensen ligger p? andra sidan materialet. Se figur 3.

Fig. 2

Fig. 3

The size used is usually a diameter value, but in certain cases other sizes can be used. See figure 4.

Som storlek anv?nds oftast en diameter men i vissa fall kan annan storlek anv?ndas. Se figur 4.

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Fig. 4

If the upper portion of the circle is left empty, this means that the datum is a point. Normally,

however, a size is always given, but indication in accordance with figure 5 can be used at the early stages before the size of the surface has been determined.

Om ?vre delen av cirkeln l?mnas tom betyder detta att referensen ?r en punkt. Normalt anges dock alltid en storlek men angivning enligt figur 5 kan anv?ndas i tidiga skeden innan storleken p?

ytan har best?mts.

Fig. 5

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Figure 6 below illustrates examples of master location points in holes. (The same principle applies to, e.g. pins, recesses and projections). I figur 6 nedan visas exempel p? referenspunkter i h?l. (Samma princip g?ller f?r t.ex. tappar, urtag och flikar).

If the upper section of the circle is blank, the axis is referred to.

?r ?vre delen av cirkeln tom avses centrumlinjen.

Fig. 6

When the datum is to be the median value of a feature of size, the symbol shall be placed as shown in figure 7 below. D? referensen ska vara mittv?rdet f?r ett storleksm?tt placeras symbolen enligt figur 7 Fig. 7 Evaluated datum / Utv?rderad referens

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4 Description of system 4 Systembeskrivning

The positioning system with master location points is a basic function in the geometric development process. The master location points are used throughout the entire process and are a design prerequisite that must be decided at an early stage in the process. Positioneringssystemet med referenspunkter ?r en grundfunktion i den geometriska utvecklings-processen. Referenspunkterna anv?nds genom hela processen och utg?r en konstruktions-

f?ruts?ttning som m?ste beslutas i tidigt skede i processen.

Each part has its own fixed master location points, which form the main system of the part. Varje artikel har sina best?mda referenspunkter, vilka bildar artikelns huvudsystem.

When required, subordinate systems with own master location points for openings, hole groups, etc., are also created. See examples in figures 8 and 9. Dessutom skapas vid behov delsystem med egna referenspunkter f?r ?ppningar, h?lgrupper och dylikt. Se exempel i figur 8 och 9.

A subordinate system is a selected represen-tative for the vehicle coordinate system. Ett delsystem ?r en vald representant f?r vagns-koordinatsystemet.

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Fig. 8

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Main system

Subordinate

system

Main system

Subordinate

system

Main system

Huvudsystem

Delsystem

Huvudsystem

Delsystem

Huvudsystem Fig. 9

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4.1 Master location points 4.1 Referenspunkter

For each part, six master location points distributed according to the 3-2-1 rule shall be determined. The master location points are numbered 1–6. F?r varje artikel best?ms sex referenspunkter som ?r f?rdelade enligt 3-2-1-regeln. Referenspunkterna numreras med ordnings-nummer 1 till 6.

The letter indicating the coordinate specifies the principal theoretical coordinate direction but, in practice, they are normal to the real surface. Deras koordinatbokstav anger den huvudsakliga teoretiska koordinatriktningen, men i praktiken ?r de vinkelr?ta mot den verkliga ytan.

4.2 Support location points 4.2 St?dpunkter

For non-rigid parts additional location points can be required, in addition to the six master location points, to provide complete guidance of a part. These are called support location points and numbered 7 and upwards, see figure 10. F?r icke-stela artiklar kan, ut?ver de sex referenspunkterna, ytterligare lokaliseringspunkter erfordras f?r att ge en fullst?ndig uppstyrning av en artikel. Dessa ben?mns st?dpunkter och f?r d? ordningsnummer fr?n 7 och upp?t, se figur 10.

The support location points must not be used to correct the form of the part in such a way that unfavourable stresses arise in the fitted part. Where necessary, the requirement at non-clamped position shall be indicated on the drawing. See figure 10 where requirement at non-clamped position has been indicated for support location point X7. St?dpunkterna f?r ej anv?ndas f?r att korrigera artikelns form s? att ogynnsamma sp?nningar uppst?r i monterad artikel. D?r s? beh?vs ska krav vid ej insp?nt l?ge anges p? ritningen. Se figur 10 d?r krav vid ej insp?nt l?ge angetts f?r st?dpunkten X7.

As an alternative to indication of requirement at non-clamped position, a maximum clamping force can be specified. Som alternativ till att ange krav vid ej insp?nt l?ge kan en max insp?nningskraft specificeras.

Fig. 10

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4.3 Process points

4.3 Processpunkter

In process equipment, master location and location points might have to be supplemented with process points in order to keep the parts together, for example at welding.

I processutrustning kan referens- och st?d-punkter beh?va kompletteras med process-punkter f?r att t ex vid svetsning b?ttre h?lla samman artiklarna.

In some cases there can be a need to indicate process points on the drawing. See figure 11.

I vissa fall kan processpunkter beh?va markeras

p? ritning. Se figur 11.

Fig. 11

Process points must not be used at measuring operations.

Processpunkter f?r inte anv?ndas vid m?toperationer.

4.4 Main system

4.4 Huvudsystem

The main system consists of systematically placed master location points which, where required, are supplemented by support location points.

Huvudsystemet best?r av systematiskt

utplacerade referenspunkter och vid behov ?r dessa kompletterade med st?dpunkter. The datums in the main system position the respective part directly and without tolerance to the coordinate system.

Referenserna i huvudsystemet positionerar respektive artikel direkt och utan tolerans till koordinatsystemet.

4.5 Subordinate systems

4.5 Delsystem

If required, functions on a part in the form of openings, mountings or similar which have functional requirements with respect to a

subsequent assembly part or to each other may form subordinate systems. See figure 9. Funktioner p? en artikel i form av ?ppningar, inf?stningar eller dylikt vilka har funktionskrav mot kommande monteringsartikel eller mot varandra kan vid behov bilda delsystem. Se figur 9.

A subordinate system is a selected represen-tative of the vehicle coordinate system for the purpose of being able to position parts in that system. For subordinate systems, datums are selected in accordance with the 3-2-1 rule and the system then interacts with the assembly part’s main system of the assembly part in order to secure the functional requirements. See figure 15.

Ett delsystem ?r en vald representant f?r vagns-koordinatsystemet i syfte att kunna positionera artiklar mot detta. F?r ett delsystem v?ljs referenser enligt 3-2-1-regeln och systemet samverkar sedan med monteringsartikelns huvudsystem f?r att s?kra funktionskraven. Se figur 15.

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Support location points are not possible in subordinate systems.

St?dpunkter kan ej f?rekomma i delsystem. In subordinate systems, the datums are

considered only as points and, consequently, no size is indicated in the upper portion of the symbol.

I delsystem betraktas referenserna endast som punkter och d?rf?r anges ingen storlek i symbolens ?vre del.

All subordinate systems shall be identified with a designation which shall be indicated adjacent to the lower section of the symbol. See figure 12. Samtliga delsystem ska identifieras med en

beteckning som anges i anslutning till symbolens nedre del. Se figur 12.

The master location points in subordinate

systems can be specified in relation to the main system or to another subordinate system. Figure 13 shows examples of requirement specification in relation to the main system, and figure 14 shows examples of requirement specification in relation to another subordinate system. Referenspunkterna i delsystem kan kravs?ttas mot huvudsystemet eller annat delsystem. Figur 13 visar exempel p? kravs?ttning till huvud-systemet och figur 14 visar exempel p? kravs?ttning till annat delsystem.

Fig. 12

Fig. 13

Fig. 14

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Main system/

Huvudsystem

Main system/

Huvudsystem Fig.15a Main system body side, complete /

Huvudsystem karossida komplett

Fig.15b

Fig.15c Subordinate system window opening/

Delsystem glas?ppning

4.6 Positions of master location and

support location points 4.6 Positioner f?r referens- och

st?dpunkter

The positions of the master location and support location points shall be given in DSM (Digital Shape Model) and CAD the Master. Positionerna f?r referens- och st?dpunkter anges i DSM (Digital Shape Model) och CAD the Master.

For information purposes, a table of coordinate values can be given on the drawing, see the table below. Som information kan ocks? tabell med koordinat-v?rden finnas p? ritningen, se tabell nedan.

When using subordinate systems, the positions of the datums shall be presented in clearly identified separate tables for each subordinate system. D? delsystem anv?nds ska referensernas l?ge ges i tydligt identifierade, separata tabeller f?r varje delsystem.

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All master location and support location points shall also be drawn in views or sections. Exception to this rule can be made when several master location and support location points can be shown with typical views or sections or when the part is defined by a CAD Master. Alla referens- och st?dpunkter ska ?ven ritas i vyer eller snitt. Undantag fr?n denna regel kan

g?ras n?r flera referens- och st?dpunkter kan visas med typiska vyer eller snitt eller n?r artikeln ?r definierad av en CAD the Master.

Coordinate values only for information. Exact definition in digital shape model

Fig. 16

4.7 Sizes representing master

location and support location

points in equipment 4.7 Storlek som representerar

referens- och st?dpunkter i

utrustningar

The size shall be chosen with respect to function and inspection. The size is often a restricted surface, but can also be a point. Storleken v?ljs med h?nsyn till funktion och kontroll. Storleken utg?rs oftast av en begr?nsad yta men kan ocks? vara en punkt.

For sheet metal parts the size ?12 is normally used F?r artiklar i tunnpl?t anv?nds normalt storleken ?12.

The size of the master location and support location surfaces should be the same in process and inspection equipment. In certain cases, process equipment might require a different size. As far as inspection equipment is concerned, the indicated size always applies. Referens- och st?dytornas storlek b?r vara lika i b?de process- och kontrollutrustning. I process-utrustningar kan i vissa fall annan storlek erfordras. I kontrollutrustningen g?ller alltid angiven storlek.

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4.7.1 Locating holes in sheet metal

4.7.1 Styrh?l i tunnpl?t

The hole size and tolerance shall be selected from the tables below.

H?lstorlek och tolerans v?ljs ur nedanst?ende tabeller.

Round locating holes/ Runda styrh?l Slotted holes / Avl?nga styrh?l

+015

,± 0,5

4.8 Part drawings

4.8 Detaljritningar

To illustrate the location of the part’s master location and support location points, an axono-metric view showing the basic shape of the part shall also be included on the drawing. Such an axonometric view shall show all master location and support location points. See figure 17. F?r att ?sk?dligg?ra placeringen av referens- och st?dpunkter p? artikeln ska ritningen ?ven f?rses med en axonometrisk vy som visar artikelns

grundform. S?dan axonometrisk vy ska visa samtliga referens- och st?dpunkter. Se figur 17. The table of coordinate values for master location and support location points shall be placed next to this axonometric view. Tabellen med koordinatv?rden f?r referens- och st?dpunkter ska placeras i anslutning till denna axonometriska vy.

Fig. 17

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4.8 Assembly drawings 4.8 Komplettritningar

On assembly drawings, the position of the coordinates and the guiding direction of all master location and support location points shall be indicated in the same way as on part drawings. P? komplettritningar anges koordinatl?ge och styrriktning f?r samtliga referens- och st?dpunkter p? samma s?tt som p? detaljritningar.

5 Selection of master location

and support location points 5 Val av referens- och

st?dpunkter

The main system for complete vehicle is built up at the same time as master location and support location points are selected for the respective part. Referenssystemet f?r vagn komplett byggs upp samtidigt som referens- och st?dpunkter v?ljs f?r respektive artikel.

The dominating functions of the parts are evaluated and the need for specially manufac-tured features is assessed. The outcome for the points/surfaces selected must be stable. Artiklarnas dominerande funktioner utv?rderas och det bed?ms om speciellt tillverkade element m?ste anv?ndas. Valda punkter/ytor m?ste ha ett stabilt utfall.

The selection of production process affects the construction of the system. Therefore, the selection of master location and support location points shall always be prepared. Valet av produktionsprocess p?verkar systemets uppbyggnad. Val av referens- och st?dpunkter ska d?rf?r alltid beredas.

6 Reference in design-

engineering documentation 6 H?nvisning i konstruktions-

teknisk dokumentation

This standard applies when referred to on the drawing by means of a reference standard or directly by the inclusion of the following note: Denna standard g?ller n?r den ?r h?nvisad till p? ritningen genom en h?nvisningsstandard eller direkt genom f?ljande not:

MASTER LOCATION SYSTEM VCS 5026,4