Method for determining inner diameter machining method in numerical control information generating function

A method for determining an inner diameter machining method in a numerical control information generating function which forms information for numerical control prior to machining, which comprises the steps of:

• inputting a blank shape and a machining shape on which the machining is to be conducted;
• determining a machining area based on at least one area defined by blank shape elements and machining shape elements, said machining area being that area which remains when a closed loop area defined by shape elements constituting the machining shape is removed from the closed loop area defined by shape elements constituting the bank shape;
• identifying an area for an inner diameter machining within said machining area, said area being determined to be a machining area defined by a line segment connecting a point having minimum diameter coordinates in a direction of an end face among points having maximum coordinates in a longitudinal direction of said machining shape with a center line in a direction of said end face, a line segment extending from the point having minimum diameter coordinates in said end face direction among the points having minimum coordinates in the longitudinal direction of said machining shape to a point having the coordinates in the longitudinal direction which are identical to the minimum coordinates of said blank shape in the longitudinal direction, a line segment extending from an end point of the line segment in the longitudinal direction to the center line in the direction of said end face, said center line and said machining shape;
• and
• extracting as a characteristic machining area to the inner diameter machining with an unprocessed through hole wherein the minimum diameter coordinates in the end face direction of said machining shape element are not zero but the minimum diameter coordinates of the end face direction of the blank shape elements are zero within said inner diameter machining area based on shape element data thereof so as to automatically determine types and scope of machining for said characteristic machining areas.

A method for determining an inner diameter machining method in a numerical control information generating function which forms information for numerical control prior to machining, which comprises the steps of:

• inputting a blank shape and a machining shape on which the machining is to be conducted;
• determining a machining area based on at least one area defined by blank shape elements and machining shape elements, said machining area being that area which remains when a closed loop area defined by shape elements constituting the machining shape is removed from the closed loop area defined by shape elements constituting the blank shape;
• identifying an area for an inner diameter machining within said machining area, said area being determined to be a machining area defined by a line segment connecting a point having minimum diameter coordinates in a direction of an end face among points having maximum coordinates in a longitudinal direction of said machining shape with a center line in a direction of said end face, a line segment extending from the point having the minimum diameter coordinates in said end face direction among the points having the minimum coordinates in the longitudinal direction of said machining shape to a point having the coordinates in the longitudinal direction which are identical to the minimum coordinates of said blank shape in the longitudinal direction, a line segment extending from an end point of the line segment in the longitudinal direction to the center line in the direction of said end face, said center line and said machining shape;
• and
• extracting as a characteristic machining area to the inner diameter machining with a through hole in the work wherein the minimum diameter coordinates of both the machining shape elements and the blank shape elements in an end face direction are not zero, and wherein the minimum diameter coordinates of said blank shape elements in the end face direction are smaller than the minimum diameter coordinates of said machining shape elements in the end face direction, and wherein the minimum diameter coordinates in the end face direction of the blank shape elements constituting said inner diameter machining area are smaller than predetermined criteria within said inner diameter machining area based on shape element data thereof so as to automatically determine types and scope of machining for said characteristic machining areas.

A method for determining an inner diameter machining method in a numerical control information generating function which forms information for numerical control prior to machining, which comprises the steps of:

• inputting a blank shape and a machining shape on which the machining is to be conducted;
• determining a machining area based on at least one are defined by blank shape elements and machining shape elements, said machining area being that area which remains when a closed loop area defined by shape elements constituting the machining shape is removed from the closed loop area defined by shape elements constituting the blank shape;
• identifying an area for an inner diameter machining within said machining area, said area being determined to be machining are defined by a line segment connecting a point having minimum diameter coordinates in a direction of an end face among points having maximum coordinates in a longitudinal direction of said machining shape with a center line in a direction of said end face, a line segment extending from the point having the minimum diameter coordinates in said end face direction among the points having the minimum coordinates in the longitudinal direction of having the minimum coordinates in the longitudinal direction of said machining shape to a point having the coordinates in the longitudinal direction which are identical to the minimum coordinates of said blank shape in the longitudinal direction, a line segment extending from an end point of the line segment in the longitudinal direction to the center line in the direction of said end face, said center line and said machining shape;
• and
• extracting as a machining area characteristic to the inner diameter machining with a rear end face wherein a machining area wherein the minimum diameter coordinates of the machining shape elements in the end face direction are zero or the minimum diameter coordinates of the blank shape elements in the end face direction are larger than the minimum diameter coordinates of the machining shape elements in the end face direction, and wherein the minimum diameter coordinates of the blank shape constituting said inner diameter machining areas are smaller than predetermined criteria within said inner diameter machining area based on shape element data thereof so as to automatically determine types and scope of machining for said characteristic machining areas.