Machining program management apparatus

A machining program management apparatus for managing an alteration made to a machining program stored in at least one machine tool, the machining program management apparatus comprising:

• a machining program information storage section that stores machining program information, the machining program information being information on the machining program stored in the machine tool;
• an alteration information storage section that stores alteration information, the alteration information being information on an alteration made to the machining program;
• a machining program updating information acquisition section that acquires, at predetermined intervals set in advance, a piece of machining program updating information including a last update date and time of the machining program stored in the machine tool;
• a machining program information updating section that identifies a machining program, to which an alteration is made, on the basis of the machining program information stored in the machining program information storage section and the piece of machining program updating information, creates a piece of alteration information on the alteration and stores the piece of alteration information in the alteration information storage section, and updates a piece of machining program information corresponding to the machining program, to which the alteration is made, in the machining program information stored in the machining program information storage section;
• and
• an alteration information display section that displays the alteration information stored in the alteration information storage section, wherein
• the machining program information includes at least contents of the machining program, and
• the machining program information updating section acquires the machining program, to which the alteration is made, from the machine tool, makes a comparison with the contents of the machining program included in the piece of machining program information corresponding to the machining program, to which the alteration is made, in the machining program information stored in the machining program information storage section and creates a piece of difference information, creates the piece of alteration information on the basis of the piece of difference information and stores the piece of alteration information in the alteration information storage section, and updates the machining program information stored in the machining program information storage section with contents of the machining program to which the alteration is made.