Category Archives: Pipe Designer

Associated to exhaust pipe design. Linked to Pipe Designer software.

Tutorial for the new PipeDesigner version

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A computation bug has been corrected and now, the new version allows the imagination of pipes…

On this exemple, we use the formula from Mr Blair.

Below, some screen shots of the steps :

  • Pipe Designer => the button
  • Hydroforming
    • Button DXF Hydroforming
    • Button DXF Hydroforming + check case “Cut”
  • Visualisation in A9CAD

Skeleton creation steps

  • Image 1 : default values for the nine sections
  • Image 2 : values for the skeleton
  • Image 3 : saving the skeleton parameters in a texte file
  • Images 4, 5 et 6 : DXF files creation
    • Pipe
    • Hydroforming flat pattern
    • Hydroforming flat pattern for cutting

Results for the skeleton

DXF Visualisation

The pipe

Hydroforming patterns

New version of PipeDesigner

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The new PipeDesigner program (2014-02-26) has been released with a export feature to ConeDesigner.

See the tutorial below for detail on getting the data for ConeDesigner.

Example: input data (by default in the GUI) :

Displacement : 124.90cc
Exhaust duration : 193.00°
Exhaust port height :  25.00mm
Exhaust port width :  35.00mm
Cylinder length :  52.00mm
Desired Power:  27.00HP
Engine Rotation : 9800.00 rpm
Coefficient Horn :   1.60

Step 1 => Click on “Compute Pipe” button => Result below

– Blair formulas
– Metal thickness 0.8mm (by default)
D0 :  37.41 mm
D1 :  37.41 mm
D2 :  50.12 mm
D3 :  72.49 mm
D4 :  94.58 mm
D5 :  94.58 mm
D6 :  21.06 mm
D7 :  21.06 mm
L01 :  44.64 mm
L12 : 265.77 mm
L23 : 176.86 mm
L34 :  88.91 mm
L45 : 106.31 mm
L56 : 231.94 mm
L67 : 231.94 mm
Total length : 1146.37 mm

Step 2 => Click the “Pipe Designer” button

– Put these data for the pipe profile for the 8 sections
Arc X : Rayon,Angle
Arc 0 : 44.640000,0.000000
Arc 1 : 253.800000,60.000000
Arc 2 : 176.000000,0.000000
Arc 3 : 88.910000,0.000000
Arc 4 : 36.310000,0.000000
Arc 5 : 35.000000,0.000000
Arc 6 : 35.000000,0.000000
Arc 7 : 950.000000,14.000000
Arc 8 : 950.000000,14.000000
– The following files will be created automatically :
– txt file for the parameters => PipeDesginer.txt
– DXF file for the pipe profile => PipeProfile.dxf

Step 3 => Open the file PipeDesginer.txt and he should contain the following data

You could verify that the diameters in this sample are exactly the same as the ones at step 1 because I pay attention to lengths of the 8 sections of the pipe shape (the cylindrical section has been split in 3 parts!!!)

Arc X : Rayon,Angle,DIn,Dout
Arc 0 : 44.640000,0.000000,37.409979,37.409979
Arc 1 : 253.800000,60.000000,37.409979,50.120635
Arc 2 : 176.000000,0.000000,50.120635,72.383361
Arc 3 : 88.910000,0.000000,72.383361,94.372427
Arc 4 : 36.310000,0.000000,94.372427,94.584018
Arc 5 : 35.000000,0.000000,94.584018,94.584018
Arc 6 : 35.000000,0.000000,94.584018,94.584018
Arc 7 : 950.000000,14.000000,94.584018,21.063705
Arc 8 : 950.000000,14.000000,21.063705,21.063705

DIn = Input diameter of the cone
DOut = Output diameter of the cone

Step 4 => Run ConeDesigner to create the unfold pattern of section Arc1

D2 = DOut = 50.120635mm
D1 = DIn = 37.409979mm
Angle A = Angle =60°
Radius R = Rayon = 253.80mm