Nova Patents
BRPI0809286A2

Method for the production of a three-dimensional object

Abstract

A method of manufacturing a three-dimensional object is disclosed, in which the object is solidified layer by layer by solidifying a building material by means of a beam of a gas laser at locations in each layer corresponding to the cross section of the object, wherein the power of the laser is measured and the power of the laser is controlled according to the measured value. The power measurement takes place in a time window, in which a change of the power occurs, and an input control signal of the laser is controlled according to the measured values.

Term

Projected expiry 15 December 2028.

  1. Priority
  2. Filed
  3. Granted
  4. Today
  5. Projected expiry

1 claim: 1 independent, 0 dependent

  1. 1
    15/12/2008 (87) Publicação Internacional:wo 2009/083i22de Translation of claims of equivalent WO 2009083122 A1 09/07/2009 claims 1. A method for producing a three-dimensional object, Foi retificada a publicação 2284 de 14/10/2014 em relação ao item (54) 5 in which the object in each case to the cross-section of the object is solidified in a layer corresponding locations by layerwise solidifying a the building material by a beam of a gas laser, wherein the power of the laser is measured and the laser power as a function measured by the LO value is controlled, characterized in that the power measurement takes place in a time window, in which a power change occurs, and a control input of the laser as a function of the measured values ​​is controlled. L5 2. The method of claim 1, wherein the power change is abrupt. 3. The method according to claim 1 or 2, wherein the alter the performance tion 10 is a switching-on, a switching-off or switching between two power values. 4. Method according to one of the claims 1 to 3, wherein the laser beam is guided in tracks above the layer, each ! 5 track has a beginning and wherein the laser at the beginning of Track is turned on and the power measurement is carried out during the switch. 5. The method according to any one of claims 1 to 4, wherein? 0 dependence of the measured values, a switch-on ramp is determined in dependence according to the changes the control input of the laser itself during the switch. 6. The method according to one of claims 1 to 5, wherein the laser beam is guided in tracks on the layer and the track has a beginning and an end, wherein the laser is turned on at the beginning 5 of the track and off the end of the track, and wherein the control inputs of the laser of a temporally subsequent trace of the measured values ​​of performance depend during the switching of a temporally previous track. LO 7. The method according to any one of claims 1 to 6, wherein the control is performed iteratively. 8. The method according to any one of claims 1 to 7, wherein the laser is a CO2Laser is. L5 9. The method according to any one of claims 1 to 6, wherein a sensor is used as a power measurement device having a response time of about lOμs or less. 20 25 JO