Cutting resistance analysis device, cutting and machining device equipped with same, and cutting resistance analysis program

A cutting resistance analysis device adapted to calculate cutting resistance at a plurality of machining points along a path of movement of a multi-blade rotary cutting tool in cutting and machining of a workpiece using the multi-blade rotary cutting tool, the cutting resistance analysis device comprising:

• a data storage section configured to store data related to a shape of the multi-blade rotary cutting tool, a number of blades, and a shape of the workpiece;
• a cutting resistance calculating section configured to calculate an amount of cutting resistance exerted on the multi-blade rotary cutting tool at a plurality of machining points;
• a contact blade count calculating section configured to calculate a number of blades of the multi-blade rotary cutting tool that are simultaneously in contact with a machining face of the workpiece at the plurality of machining points;
• a per-blade cutting resistance calculating section configured to calculate a cutting resistance per blade of the multi-blade rotary cutting tool at the plurality of machining points based on the amount of cutting resistance and a calculation result of the contact blade count calculating section at each of the machining points;
• and
• a cutting resistance interpolation section configured to calculate by linear interpolation the cutting resistance per blade between machining points based on the amount of cutting resistance per blade at a prescribed machining point calculated by the per-blade cutting resistance calculator and the amount of cutting resistance per blade at a machining point adjacent to the prescribed machining point,
• the cutting resistance interpolation section being further configured such that when the cutting resistance per blade at an upstream machining point along the path of the multi-blade rotary cutting tool is less than the cutting resistance per blade at a downstream machining point, the cutting resistance interpolation section sets the cutting resistance per blade at the downstream machining point as the amount of cutting resistance per blade between the downstream machining point and an adjacent machining point to the downstream machining point.