Controller for machine tool and control system
AssigneeFanuc Corporation
InventorMasahiko Tsuchiya
Life of this patent
Estimating the term…
Abstract
In a machine tool that performs threading, a thread-cutting startable area parallel to an X-axis of the machine tool is set based on a timing when a relative feed rate between a tool and a workpiece reaches a thread-cutting feed rate after the tool starts cutting feed. Then, movement of the tool in an X-axis direction is started first, and a rotation position of a spindle is monitored. When a thread-cutting start angle of the spindle is detected, cutting feed in a Z-axis direction of the tool is started if the tool travels in the thread-cutting startable area.
Claims9
A controller controlling a machine tool provided with a first axis causing a tool to move in an axial direction of a spindle and a second axis causing the tool to move in a direction different from an axial direction of the first axis, the machine tool driving the tool by the first axis and the second axis to perform threading of a workpiece attached to the spindle, the controller comprising:
- a thread-cutting startable area deciding portion deciding a thread-cutting startable area in a direction of the second axis of the tool, based on a timing when a relative feed rate between the tool and the workpiece reaches a thread-cutting feed rate after the tool starts cutting feed in a direction of the first axis;
- and
- a thread-cutting start timing deciding portion starting the cutting feed of the tool when a position of the tool on the second axis is within a range of the thread-cutting startable area.
A control system controlling a machine tool provided with a first axis causing a tool to move in an axial direction of a spindle and a second axis causing the tool to move in a direction different from an axial direction of the first axis, the machine tool driving the tool by the first axis and the second axis to perform threading of a workpiece attached to the spindle, the control system comprising:
- a thread-cutting startable area deciding portion deciding a thread-cutting startable area in a direction of the second axis of the tool, based on a timing when a relative feed rate between the tool and the workpiece reaches a thread-cutting feed rate after the tool starts cutting feed in a direction of the first axis;
- and
- a thread-cutting start timing deciding portion starting the cutting feed of the tool when a position of the tool on the second axis is within a range of the thread-cutting startable area.
Dependencies are inferred from the claim text.