BROACHING MACHINE AND BROACHING TOOL FOR MACHINING CIRCULAR ARC GROOVE

摘要

A broaching machine (30) for machining a circular arc groove, particularly a circular arc tenon tooth groove, comprises a broaching tool (10), a broaching tool driving mechanism for driving the broaching tool (10) to move, and a workpiece positioning mechanism for positioning a workpiece. The broaching tool (10) comprises a rotary disc (12) and a tool teeth portion (14) connected with the rotary disc (12). The tool teeth portion (14) is provided with a first tool teeth portion end (18) and a second tool teeth portion end (20). The tool teeth portion (14) comprises multiple tool teeth (22) distributed between the first tool teeth portion end (18) and the second tool teeth portion end (20). The multiple tool teeth (22) are arranged in a circular arc shape that is concentric with the rotary disc (12). The heights or widths, or both the heights and weights of the multiple tool teeth (22) gradually increase from the first tool teeth portion end (18) to the second tool teeth portion end (20). The broaching tool driving mechanism is used for driving the broaching tool (10) to rotate around a first axis (40) to machine a circular arc groove in the workpiece.