Manufacturing apparatus and manufacturing method for manufacturing less unbalanced blower blade

A manufacturing apparatus for manufacturing a blower blade in which a plurality of blade portions having a same shape are arranged around a rotation axis line, the manufacturing apparatus comprising:

• a machining device configured to perform cutting or grinding to machine the blower blade;
• a balance correction device provided independently from the machining device, configured to perform cutting or grinding to machine the blower blade cut or grinded by the machining device;
• a balance measurement device configured to measure at least one of an angle or vibration of the blower blade to measure an unbalance of the blower blade;
• and
• a control device including a processor configured to control the machining device and the balance correction device,
• wherein the processor of the control device is configured to:
• control the machining device, a first time, according to a first program trajectory and a machining parameter, to cut or grind each of the blade portions of the blower blade while rotating the blower blade around the rotation axis line,
• determine a first unbalance of the blower blade by using at least one of a first angle or a first vibration measured by the balance measurement device,
• individually adjust a machining amount of the machining device by changing the machining parameter so that the machining device cuts or grinds each of the blade portions a second time by a second program trajectory geometrically similar to but shifted from the first program trajectory by an amount based on the machining parameter, based on data of the determined first unbalance of the blower blade, so as to reduce a first unbalance of the blower blade into a first range, and
• after the first unbalance of the blower blade has been reduced into a first range by the machining device cutting or grinding each of the blade portions the second time, determine a second unbalance of the blower blade by using at least one of a second angle or a second vibration measured by the balance measurement device, and control the balance correction device to cut or grind the blower blade so as to reduce the second unbalance of the blower blade into a second range smaller than the first range.