Machining management apparatus

A machining management apparatus comprising:

• a tool information storage storing therein information relating to each of cutting tools used in a machine tool, the tool information storage storing therein a coefficient n and a coefficient C in a tool life equation below corresponding to tool life influencing factors including at least a workpiece to be cut and a material of the cutting tool;
• an adapted cutting speed calculator executing a machining condition receiving processing of receiving, as freely set machining conditions, information on the tool life influencing factors and information on a desired cutting time, a coefficient recognition processing of recognizing the coefficient n and the coefficient C corresponding to the received tool life influencing factors by referring to the tool information storage based on the received information on the tool life influencing factors, and a cutting speed calculation processing of calculating a cutting speed adapted to the desired cutting time according to the tool life equation below based on the recognized coefficient n and coefficient C:
• V·Tn=C,
• where V is a cutting speed, T is a tool life time, and n and C are coefficients;
• a tool information generator receiving at least two sets of history information along with information on the tool life influencing factors, the history information being obtained by machining a set workpiece with a set cutting tool and accumulating an information pair containing a cutting speed and a cutting time under the cutting speed until the cutting tool reaches an end of its tool life, calculating the coefficient n and the coefficient C corresponding to the tool life influencing factors according to the tool life equation based on the received two sets of history information, and storing the calculated coefficient n and coefficient C along with the information on the tool life influencing factors into the tool information storage.

A machining management apparatus comprising:

• a tool information storage storing therein information relating to each of cutting tools used in a machine tool, the tool information storage storing therein a coefficient n and a coefficient C in a tool life equation below corresponding to tool life influencing factors including at least a workpiece to be cut and a material of the cutting tool and additionally including any one of a feed amount of the cutting tool, a width of cut, and a depth of cut;
• an adapted cutting speed calculator executing a machining condition receiving processing of receiving, as freely set machining conditions, information on the tool life influencing factors and information on a desired cutting time, a coefficient recognition processing of recognizing the coefficient n and the coefficient C corresponding to the received tool life influencing factors by referring to the tool information storage based on the received information on the tool life influencing factors, and a cutting speed calculation processing of calculating a cutting speed adapted to the desired cutting time according to the tool life equation below based on the recognized coefficient n and coefficient C:
• V·Tn=C,
• where V is a cutting speed, T is a tool life time, and n and C are coefficients;
• and
• a tool information generator receiving at least two sets of history information along with information on the tool life influencing factors, the history information being obtained by machining a set workpiece with a set cutting tool with a condition set with respect to at least any one of the feed amount of the cutting tool, the width of cut, and the depth of cut, and accumulating an information pair containing a cutting speed and a cutting time under the cutting speed until the cutting tool reaches an end of its tool life, calculating the coefficient n and the coefficient C corresponding to the tool life influencing factors according to the tool life equation based on the received two sets of history information, and storing the calculated coefficient n and coefficient C along with the information on the tool life influencing factors into the tool information storage.