General Mechanical

General Mechanical

Additive Wizard Laser Settings

    • sohailmohammed777
      Subscriber

      In the Additive Wizard, Machine settings have been restricted to hatch spacing and laser speed but there is nothing about the laser power and spot size and all !! If there is any preassigned value please let me know what it is !!


       


      Thanks


      Sohail

    • Sandeep Medikonda
      Ansys Employee

      Workbench additive does not use laser power. We assume that the process parameters have been set correctly so that all the powder on the top layer has been melted, and not underheated nor overheated. We also heat (melt) the entire layer at once.


      However, we can indirectly calculate the laser power. Once we have the volume of the melted material, that will give us the mass of it and based on the latent heat(Lf) and heat capacity(C) one can find how much energy is needed for it. Now just divide this energy by the time it took to create that much of molten material, and this will give us the power of the laser. No FEA needed.


      Q=Power*time=mCΔT+mLf

    • sohailmohammed777
      Subscriber

      Hello Sir


       


      What if we would like to perform the simulation under some 120 W laser power with a preheated(400 C) powder, spot size of 100   μm,scan speed 220 mm/s,powder size 30μm !! In Additive Wizard only a couple of parameters are available. Please help me with this thing !!


       


       Thanks


       


      Sohail

    • Sandeep Medikonda
      Ansys Employee

      The whole idea of the additive wizard and WB Additive, in general, is based on the concept of lumped layer approach. Where you are not simulating each laser pass but instead a lumped physical layer (which contains 20-30 laser passes). This has a lot of computational advantages as expected and hence the whole idea of perfectly melting a whole layer (not above or below). This assumption is basically telling you that the laser packs enough power to melt that whole layer. Please refer to the help for further details. 


      If these are important, you would've to use the Additive Print application. Which has a different approach.
      See the help on this.


       

Viewing 3 reply threads
  • You must be logged in to reply to this topic.