What is ISO 19744 about?
ISO 19744 specifies, with reference to ISO 230-1, the geometric tests on numerically controlled (NC) broaching machines of normal accuracy, with vertical axis acting for cutting operation. The accuracy of rotary axes, if available, is checked with reference to ISO 230-7.
ISO 19744 also specifies, with reference to ISO 230-2, the positioning tests on vertical surface type broaching machines for both linear and rotary axes.
ISO 19744 proposes test pieces containing broached slots and grooves with reference to ISO 230-1, cutting tests under finishing conditions. It also specifies the characteristics and dimensions of the test pieces themselves. ISO 19744 is intended to supply minimum requirements for assessing the cutting accuracy of the machine.
ISO 19744 also establishes the tolerances for the test results corresponding to general purpose and normal accuracy vertical surface type broaching machines equipped with numerical control.
ISO 19744 explains different concepts or configurations and common features of NC vertical surface type broaching machines which are normally used in the manufacturing of turbine disks. ISO 19744 also provides a terminology and designation of controlled axes with reference to ISO 841.
NOTE- ISO 19744 deals only with the verification of the accuracy of the broaching machine. ISO 19744 does not apply to the operational testing of the machine (e.g., vibration, abnormal noise, stick-slip motion of components), nor to machine characteristics (e.g., speeds, feeds) as such checks are generally carried out before testing the accuracy.
Who is ISO 19744 for?
ISO 19744 on testing of accuracy for vertical surface type broaching machines is useful for:
- Broaching machines designers
- Broaching machines manufacturers
- Industries using broaching machines
Why should you use ISO 19744?
The main application of numerically controlled surface-type broaching machines is for generating slots and grooves in turbine disks.
ISO 19744 supplies you information as wide and comprehensive as possible on tests on numerically controlled broaching machines which can be carried out for comparison, acceptance, maintenance or any other purposes.
ISO 19744 provides guidance for the tests to be performed, tolerances, and software compensation.
ISO 19744 lays out geometric tests for Straightness errors of linear motions, squareness/parallelism errors between linear/rotary motions, table and work holding rotary axis and, broach holder. These tests will help you with the normal accuracy vertical surface type broaching machines equipped with numerical control.