scope:

This part of ISO 14649 specifies the data elements describing cutting tool data for milling machine tools and machining centres, which work together with the process data for milling machine tools and machining centres specified in ISO 14649-11. They can be used as criteria for selecting one of several operations; they do not describe complete information on a particular tool. Therefore, leaving out optional attributes gives the controller more freedom to select from a larger set of tools.

NOTE 1 The numerical control (NC) is assumed to have access to complete description of specific tools in a database. The milling_machine_tool_schema defined in this part of ISO 14649 serves as a basic tool schema, including the information required by the CNC to select a tool from the machine tool's tool magazine.

NOTE 2 In ISO 6983, the tool is defined by its identifier (e.g. "T8"). No further information concerning the tool type or geometry is given. This information is part of the tool set-up sheet, which is supplied with the NC program to the machine. The tool set-up sheet gives the relationship between the tool location (e.g. "slot 8 of the tool magazine") and the type of tool (e.g. "drill 4 mm").

This part of ISO 14649 also specifies the information to be provided in the tool set-up sheet:

- tool identifier;

- tool type;

- tool geometry;

- application-dependent expected tool life.

The milling_machine_tool_schema does not include information which is part of the tool database. The tool database is related to the machine tool and the tool itself, but is independent of the NC program. The following data types are outside the scope of this part of ISO 14649:

- normative tool life;

- tool location in the tool changer;

- adaptive items also know as tool holders or tool clamping devices;

- tools for other technologies, such as turning, grinding and electrical discharge machining (EDM)¹⁾.

NOTE 3 It is important to understand that all length measure types used in this part of ISO 14649 are not toleranced length measure types because they are used to describe the tools required for the manufacturing of a workpiece, not the actual dimensions of the tools available at the machine. A real tool will be selected by the tool management based on the actual tool dimensions and the tolerances of features.

This part of ISO 14649 uses the EXPRESS language as specified in ISO 10303-11.

1) These technologies are described in other parts of ISO 14649.