Algorithm (Workflow)

The function SGDIN912head creates a solid geometry model of a screw head according to the DIN 912 standard. It is part of the Solid Geometry library and was introduced in version 4.9.

Input Parameters

• M: Diameter metric, a numeric value representing the diameter of the screw.
• Tp: Length metric in mm, which can be a numeric value or the string 'inbus'.

Algorithm Steps

1. Retrieve the diameter M and length Tp from the input arguments using getfuncparams. The default values are 2.5 for M and 'inbus' for Tp.
2. Initialize a variable ch to determine if a chamfer is applied, defaulting to true.
3. Load the DIN 912 standard data into DIN_912 and adjust the second column by multiplying with a factor from dofn(6).
4. Find the corresponding table line TL for the given diameter M using DINfindinTab.
5. Set the diameter M to the first element of TL and define an overlap ol of 0.1.
6. Create the screw head geometry:
• If ch is true, create a chamfered cylinder using SGofCPLzchamfer with a circle of radius TL(6)/2 and height TL(5).
• If ch is false, create a simple cylinder using SGofCPLz with the same parameters.
7. Create a subtraction geometry SGB using SGofCPLz with a circle of radius TL(2)/2 and height TL(3) + ol.
8. Subtract SGB from SGA using SGsubtract with the 'aligntop' option and an offset of +ol.
9. Set the transformation of the resulting geometry SG using SGTset with a rotation transformation TofR(rot(0,pi,0)).
10. Assign a stamp name to SG using sprintf to format the string 'DIN912 M%.1f' with the diameter TL(1).
11. If no output is requested, plot the geometry using SGfigure, SGplotalpha, and SGTframeplot with specific view settings.