HOLLFELDER - Основной каталог - 2013 EN

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Protability calculation

Composition of cost per part                                                                             Comparision

                                  Increase in output                                                                         Increase in tool life

                                  (produced pieces                                                                           Increase in
                                                                                                                             tool life by +25%
                                  per time unit)      30                                                 25 %  25 %          only constitutes a
                                                                                                         17 %   1%
                Production costs  Increase in         20                                                                     Reduction of
                                  productivity        10                                                                     cost per unit
                   76 - 82 %      by +25%                                                                                    by -1%
                                  constitutes a
                 Material costs
                                                      0
                 15 - 19 %
                                                      10

Tool costs                        Reduction of        20
                                  cost per unit       30
     2-6%                         by -17%

Example: Milling of cylinder head faces with PCD

Conventional face milling cutter                                                                         Hollfelder-Ghring face milling cutter

Tool ¬¬MM                    Increase in                                                               Tool ¬¬MM
z =6                                                                                                        z = 13
vc = 2.400 m/min                  from            to                                                        vc = 2.400 m/min
fz = 0.14 mm                                                                                                fz = 0.14 mm
vf = 6.418 mm/min                 productivity                                                              vf = 13.905 mm/min
Cutting length = 700 mm                                                                                     Cutting length = 700 mm
t = 0.109 min/unit                                                                                          t = 0.05 min/unit

                                                  Reduction of costs per unit

Machine costs                     0.8 € / min     Machine costs                                                       0.8 € / min
Costs per unit                    0.087 €
Units per day                     2.000           Costs per unit                                                      0.040 €
Costs per day                     174.- €
                                                  Units per day                                                       2.000

                                                  Costs per day                                                       80.- €

                                                  Saving per day                                                      94.- €

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