Method of providing data for minimizing difference between dimensions of three-dimensional structure formed by laser radiation and design values of scan path of such three-dimensional structure and computer and computer program for providing such data

A computer implemented method of providing data for minimizing a difference between a plurality of dimensions of a three-dimensional structure formed by a laser radiation and a plurality of design values of a scan path of the three-dimensional structure, the method comprising:

• receiving a three-dimensional model data;
• providing a slice data from the three-dimensional model data;
• providing a scan path data from the slice data;
• modeling a manufacturing process of the three-dimensional structure and formulating a shrinkage of material used in the manufacturing process, wherein a shrinkage function is formulated in the case where the material shrinks depending on a scan length xi of the scan path of the laser and in which the shrinkage function is represented by an Equation 1;
• performing an optimization calculation for minimizing a difference between the dimensions of the three-dimensional structure after the shrinkage of the material and the design values by using the shrinkage model formulated according to the Equation 1 and computing a scan length x minimizing the difference;
• and
• outputting the scan path data including a scan length x minimizing the difference;
• wherein xi of the Equation 1 is the scan length of the scan path and s(l) of the Equation 1 is a shrinkage rate per unit length of the material.

A non-transitory computer program product for providing data for minimizing a difference between a plurality of dimensions of a three-dimensional structure formed by a laser radiation and a plurality of design values of a scan path of the three-dimensional structure, the computer program product comprising a computer readable storage medium having program instructions embodied therewith which, when executed, cause a computer device to perform the steps of a method comprising:

• modeling a manufacturing process of the three-dimensional structure and formulating a shrinkage of material used in the manufacturing process, wherein a shrinkage function is formulated in the case where the material shrinks depending on a scan length xi of the scan path of the laser and in which the shrinkage function is represented by an Equation 1;
• and
• performing an optimization calculation for minimizing a difference between the dimensions of the three-dimensional structure after the shrinkage of the material and the design values by using the shrinkage model formulated according to the Equation 1 and computing a scan length x minimizing the difference;
• wherein xi of the Equation 1 is the scan length of the scan path and s(l) of the Equation 1 is a shrinkage rate per unit length of the material.

A three-dimensional structure manufacturing machine which is connected to a computer having a storage medium storing the non-transitory computer program product comprising a computer readable storage medium having program instructions embodied therewith which, when executed, cause a computer device to perform the steps of a method comprising:

• modeling a manufacturing process of the three-dimensional structure and formulating a shrinkage of material used in the manufacturing process, wherein a shrinkage function is formulated in the case where the material shrinks depending on a scan length xi of the scan path of the laser and in which the shrinkage function is represented by an Equation 1;
• and
• performing an optimization calculation for minimizing a difference between the dimensions of the three-dimensional structure after the shrinkage of the material and the design values by using the shrinkage model formulated according to the Equation 1 and computing a scan length x minimizing the difference;
• wherein xi of the Equation 1 is the scan length of the scan path and s(l) of the Equation 1 is a shrinkage rate per unit length of the material.