KÄRCHERCATIA V5/6 METHODOLOGYkaercher_cat… · General Information This information site deals with the general, methodical and constructive procedurefor creating both solid and

KÄRCHER CATIA V5/6 METHODOLOGY

January 2020

§ Start Part

§ Template with pre-defined geometry

§ Allowed graphical properties

§ Industrial design

§ Final condition and Q-Checker

§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

§ General Information and Kärcher Environment

§ Kärcher CATIA design methodology

§ Definition of sub structures

§ Structure Methodology

§ Part Methodology

§ CATIA Minus Minus/ Negative Negative method

§ Surface Design method

§ Combination of „Bodies“ and „Geometrical Sets“

CAD-PLM | PRS | 9th January 20202

CONTENT

General Information

This information site deals with the general, methodical and constructive procedure for creating both solid and shape geometry by observing the design method.

These specifications assures the data quality requested by Kärcher and provides easy and expedient creating as well as fast changing.

Kärcher Environment

All Parts which are generated for Kärcher have to observe the Kärcher settings. Divergences from these settings may lead to massive errors and are not tolerated.

For CATIA drawings it is mandatory to use the Kärcher Drawing Standard.


GENERAL INFORMATION AND KÄRCHER ENVIRONMENT

All system requirements and settings are available at https://ddx.kaercher.com/ddx





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

The main objective of the Kärcher methodology is to divide complex geometry into small, simple, independent sub structures.

Benefits:

§ It makes it easier to understand and navigate the design for you and others

§ Changes on sub structures do not affect other geometry directly

§ Changes can be implemented faster

§ Substructures can be reused in the same and/ or other parts using copy & paste

§ The use of substructures instead of one level design optimizes update times after changes

§ The use of Boolean-Operations makes it possible to use EdgeFillets type intersection, which is the most stable radius type in solid design

Basic procedure:

“Bodies” are used for solid geometry and “Geometrical Sets” are used for wireframe and surface geometry. The structuring methodology can be used in the same way for solid and surface elements.


KÄRCHER CATIA DESIGN METHODOLOGY





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

The result PartBody is divided in individual sub structures.

• Try to break down each component function into an own sub-structure.

• The objective for each sub-structure is to create self-contained designs independent of other sub-structures.

• This ensures an easy reuse of complete structures via copy and paste.


DEFINITION OF SUB-STRUCTURES

Sub-structures should fulfil the following requirements: • Documented in an own "Body“ or "Geometrical Set"• Should be freely positioned using a position point• Each sub-structure should be as independent as possible from

other structures• Should be given a useful name

• Boolean Operation name = Add_“Body name“, Remove_“Body name“…

• GeoSet name = „Body name“

see also „Naming Rules“





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

STRUCTURE METHODOLOGY


CAD structures at Kärcher are structured according to the top-down method.

Geometries and links are always passed from top to bottom.

Reference elements are always located above the child element.

STRUCTURE METHODOLOGY


Link rules:§ Geometries can be linked from one sub-structure to another.§ Geometries can be linked from one part to another.§ Context links are allowed only when using Skeleton method.§ Cross-links and are prohibited.§ Care should be taken not to create link chains or loops.

Recommended link flow

There is one master geometry.From it, geometry areas are passed on to the child elements using one direct link.

Non recommended link flow

Link- chains are not recommended and should be avoided.

Forbidden link flow

Cross-links and link-loops are forbidden.





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips


PART METHODOLOGY

The method of creating individual parts follows the structural rules already presented.

The procedure for the construction of independent sub-structures is characterized by the principle of being able to copy and reuse existing areas of geometry quickly and easily.

Copy&

Paste


PART METHODOLOGY

§ Out of this motivation, the following principles emerge.

§ Keep your setup simple and smart.

§ Break down complex geometries into useful small and simple geometric structures.

§ Ideally, use no more than 10 features per tree node.

§ Create only necessary links between the individual geometric structures, copied elements with link, Boundary Representation (BREPS) and projections etc.

§ Do not create too much parameter. Limit them to the important ones.

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PART METHODOLOGY

§ Keep the structure traceable.

§ Use colors to make the individual geometric structures meaningfully visible.

§ Give each feature a short meaningful name, which helps you and others to easily navigate your structure.

see also „Allowed Graphical Properties“


PART METHODOLOGY

§ Only work according to the top-down method.

§ If you reuse geometries from other superordinate structures, always copy them with a link to the position to be used and complete the name with the extension "_CPL" (Copy & Paste with Link).





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

Advantages of Minus Minus Methodology:

• Intersection fillets can be used

• Core tool can be visualized easily

• Inner volume can be analysed easily

• Inner volume can be extracted for CFD etc.

• Better control about drafts

• More commonly structured parts

Method can be used for:

• Molded parts

• CFD relevant parts


MINUS MINUS/ NEGATIVE - NEGATIVE METHOD

Complete part

Inner part

Linked Geometry


Department/author’s reference | Title | Date18

Inside Geo

Outside GeoCPL

-Thickness

-Ribs

=

Inside Geo

Outside Geo -

LinkedGeometry

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips





§ Part Methodology





CONTENT

§ Surface part design structure rules follow the same principles as for solid part design.

§ Keep your setup simple and smart.

§ Break down complex geometries into useful small and simple geometric structures.

§ Ideally, use no more than about 10 features per Geometrical Set.

§ Create only necessary links between the individual geometric structures, copied elements with link, BREPS and projections etc.

§ If you reuse geometries from other superordinate structures, always copy them with a link to the position to be used and complete the name with the extension "_CPL" (Copy & Paste with Link).

§ GeoSet name = Result name

§ Assembling feature name = ASM_“Assembled feature name“


SURFACE DESIGN METHOD

see also „Naming Rules“





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

For the integration of surface and solid design a dedicated “Geometrical Set” needs to be created in each “Body”.

All geometry elements needed for the solid design are stored under the parent result body.

If a more extensive surface design is needed for a solid feature, then instead of at least one “Geometrical Set” being situated beneath a “Body”, a hierarchical “Geometrical Set” structure must be developed.


COMBINATION OF “BODIES” AND “GEOMETRICAL SETS”

Solid design:Body incl. GeoSet and reference elements

Surface design:Body incl. GeoSet and Surface design





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

Defined structures for input geometry, design process and output geometry. The previously mentioned methods can be used within this start part.

Important:It‘s not allowed to rename or delete Bodies and Geometrical Sets starting with a #.

Standardized function sequences and pre-defined structure (Template)Each “Geometrical Set” begins with the same standardized function sequences (position point, axis system and sketches).

For the simplification of the design work, these consistently recurring design sequences are offered in the start model as template. The pre-defined structures can be copied for further sub-structures, both for surface and solid designs.


START PART OVERVIEW

General start partTemplate for sub-structures

Detailed description of start part is available athttps://ddx.kaercher.com/ddx


ALLOWED GRAPHICAL PROPERTIES

General forbidden colours redorangeblack

Position points Always hidden see ①Axis systems Always hidden see ①

Not current see ②Always right-handed see ②

Planes Always hidden see ①Line thickness smaller than 1 mm see ③

Sketches Always hidden see ①Line thickness smaller than 1 mm see ③Have a descriptive nameInclude only active geometryAlways positioned (sliding sketches are not allowed) see ④Parallel to a main plane if possibleshow a relative and complete dimensioning (“ISO constraint”) to the position point and/or to theprepared auxiliary axes in the Sketcherindependent of other structures (no direct links)in case of multiple usage the sketches must be named accordingly (e.g. curve xy Ref_for_Dome) andcopied to the other structure by using Copy / Paste Special / As Result with Link

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ALLOWED GRAPHICAL PROPERTIES

Colours, thickness and linestyle can be chosen as you like for all wireframe geometry.

Limitations:

• Forbidden colours:

• Line thickness smaller than 1mm

Hide / Show

All the wireframe geometry has to be in Hide. This includes:

red orange black

• Points• Planes• Axis systems

• Curves/Lines • Sketches





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

The results of the Industrial Design are documented in „#Export_Folder“.

Details see “Guideline Surface Modelling” (can be asked by Industrial Design Department)


INDUSTRIAL DESIGN

Example of usage of Industrial Design data





§ Part Methodology





CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

File names

The file name must not contain any special character. (Exception: - and _)Legal characters: A-Z, a-z, 0-9, -_

Display Accuracy

In the end the part has to be saved with a Display Accuracy of 0,2 mm. (This setting can be found under: Tools –Options General –Display –Performance)

CATDUA Check and Clean

After finishing the design, the files have to be checked with CATDUA. This tool finds and repairs internal errors, which the user cannot see. These errors cause problems in downstream processes. The Q-Checker automatically starts a CATDUA check and clean procedure.


FINAL CONDITION AND Q-CHECKER

Q-Checker:

The Q-Checker checks the data quality of Products, Parts and Drawings. The advantages are:

guidance for meeting methodological, geometrical and general CAD requirements.

offer an immediate correction

support for understanding and correcting errors.

assistance for cleaning models with Q-Tools

It is a very important tool to increase our data quality and engineering efficiency!

All CATIA files which are sent to Kärcher or saved to the Kärcher SAP-System have to be checked by Q-Checker with the Kärcher Profile. KO-Errors are not tolerated.


FINAL CONDITION AND Q-CHECKER

The newest version of the Kärcher Q-Checker Profile and detailed criteria description can be downloaded on https://ddx.kaercher.com/ddx





§ Part Methodology



§ Basic Shape Design features

§ Surface Design methodology



CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

1. Surface Design

1. GeoSet name = Result name

2. Assembling feature name = ASM_“Assembled feature name“


NAMING RULES

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2. Part Design

1. Boolean Operation name = Add_“Body name“, Remove_“Body name“…

2. GeoSet name = „Body name“

3. Start Part naming conventions

1. External References:In order to be able to reconstruct the origin of external geometry, the following name convention must be observed:

§ Part Number

§ Designation

§ Version (if possible)

§ Name of the geometry elements in the original model

2. Sketches with output elements must be completed with the addition … _Outputs

3. No renaming or deleting of #-named structures and elements allowed


NAMING RULES

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§ Part Methodology



§ Basic Shape Design features

§ Surface Design methodology



CONTENT

§ Start Part





§ Final condition

§ Q-Checker

§ Naming Rules

§ Tips

1. Select features in tree if possible "The tree is your friend"

2. Select from top to bottom if possible

3. When edge selection is necessary select long, "stable" edges if possible

4. When surface selection is necessary select top or bottom surface if possible


SELECTION TIPS

These steps will help you to avoid mistakes while creating a sketch.

1. Define Origin

2. Set Scale

3. Set low light mode

4. Create Profile (one closed profile per sketch)

5. Check Profile for gaps and unnecessary geometric constrains

6. Constrain geometry to origin

7. Constrain rest of geometry

8. Use SKETCH ANALYSIS to detect geometrical or constrain issues


SKETCH-TIPS

1. Create radii as close to the reference geometry as possible and as late as necessary.

2. Create your radii in the order that long edges are created for the subsequent radii.


EDGEFILLET TIPS

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3. The supporting radii are always bigger than the following radii.

4. If edge selection is necessary, select long stable edges.


EDGEFILLET TIPS

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5. If possible, select surfaces instead of edges.

6. If possible, use the Propagation type Intersection and choose a Boolean operation.


EDGEFILLET TIPS

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MAKE A DIFFERENCETHANK YOU


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KÄRCHERCATIA V5/6 METHODOLOGYkaercher_cat… · General Information This information site deals with the general, methodical and constructive procedurefor creating both solid and