solid creation in the manufacturing process l.
Download
Skip this Video
Download Presentation
Solid Creation in the Manufacturing Process

Loading in 2 Seconds...

play fullscreen
1 / 11

Solid Creation in the Manufacturing Process - PowerPoint PPT Presentation


  • 158 Views
  • Uploaded on

Solid Creation in the Manufacturing Process. Matthew Radebach GE Global Research June 8, 2008. What do we want?. Reliable method to create solid bodies while maintaining integrity of geometry . Before:. After:. Sheet Bodies. Solid Body. Why?.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Solid Creation in the Manufacturing Process' - coligny


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
solid creation in the manufacturing process

Solid Creation in the Manufacturing Process

Matthew Radebach

GE Global Research

June 8, 2008

what do we want
What do we want?

Reliable method to create solid bodies while maintaining integrity of geometry

Before:

After:

Sheet Bodies

Solid Body

slide3
Why?

Many times in manufacturing, final part geometries are available, but stock geometry is not. Initial stock geometries are necessary to design tooling, examine in-process parts. . .

Stock

Final

approach 1
Approach 1

Sheet Body

Method: UF_Modl_create_sew

Tolerance: 0.001

Type Body: 1 (Solid Body)

Result:

Created solid body when geometry allowed, but more often created sheet body. Other times sew failed completely.

Conclusion:

If interested in stock geometry, user is unable to perform desired operations on sheet body: Volume calculations, boolean operations, cutting operations, etc.

approach 2
Approach 2

Sheet bodies created

Method:

Trim sew bodies by each other, attempt sew similar to approach 1.

Result:

Often times, trim body not large enough, causing the trim to fail, but body still created.

Conclusion:

Incorrect geometry created

approach 3

Isometric View

Front View

Face overlap

Approach 3

Method: UF_Modl_create_thru_curves

All Tolerance parameters:

Base tolerances

Result:

Solid body created but faces overlap, only 4 of 6 faces created when sharp corners present

Conclusion:

Unable to perform required operations on overlapped faces: extend, trim, etc.

approach 3b

Isometric View

Front View

No face overlap

Approach 3b

Method: UF_Modl_create_thru_curves

Angle/Intersection Tolerances: Base tolerance

Distance Tolerance:

0.0

Result:

Solid body created, sharp corners preserved, 6/6 faces created

Conclusion:

All necessary operations can be performed on newly created solid. Method of choice!

sample program
Sample program
  • int create_mesh_sheet_body( tag_t *p_curve, /* primary curves */ tag_t *c_curve, /* cross curves */ int np, /* number of primary curves */ int nump, /* num of segments in each primary curve */ int nc, /* number of cross curves */ int numc, /* num of segments in each cross curve */ tag_t *sheet_body )
  • { . . .
    • for( i = 0; i < np; i++ )
    • {
    • dirs_p[i] = 1;
    • sstr_p[i] = nump;
    • }
    • prim.num = np; prim.id = p_curve; prim.dir = dirs_p; prim.string = sstr_p;
    • spine.num = 0;
    • tol[0] = 0.0;
    • tol[1]=tol[2]= BASE_TOLERANCE;
    • c_face[0] = c_face[1] = c_face[2] = c_face[3] = NULL_TAG;
    • c_flag[0] = c_flag[1] = c_flag[2] = c_flag[3] = 0;
    • body_type = 1; patch_type = 2;
    • align_method = 1;
    • v_degree = (np>4) ? 3 : np-1;
    • v_status = 0;
    • error = UF_CALL(UF_MODL_create_thru_curves (&prim, &spine, &patch_type, &align_method, val, &v_degree, &v_status, &body_type, UF_NULLSIGN, tol, c_face, c_flag, sheet_body));
    • return (error);
    • }

**Note: use for only primary curves

conclusions
Conclusions

Required:

Reliable method to create solid bodies while maintaining integrity of geometry

Why:

Many times in manufacturing, final part geometries are available, but stock geometry is not. If there is a need to look at in process work piece or geometry in needed to design process tooling, the initial shape is necessary.

Method:

UF_Modl_create_thru_curves with 0.0 distance tolerance

acknowledgements
Acknowledgements

Teresa Chen-Keat

Zuozhi Zhao