Apparatus for exchanging a tool of a boring bar and method of exchanging a tool of a boring bar using the same
An apparatus for exchanging a tool of a boring bar may include a magazine, a frame, a guide rail and an actuator. The magazine may be configured to receive a plurality of the tools. The frame may be arranged under the magazine. The guide rail may be arranged on the frame. The magazine may be movably connected to the guide rail. The actuator may be configured to rotate the magazine. Thus, the magazine configured to hold the tools may be arranged between the main shaft and the spindle exchanging apparatus to reduce a weight of the tool.
1 . A machine tool comprising:
a boring bar configured to receive a tool for machining a workpiece;
a magazine configured to store the tool for machining the workpiece;
a spindle configured to be movable in a same direction as the boring bar;
a transfer stock configured to transfer the boring bar and the spindle, the boring bar fixed to a lower end of the transfer stock;
a boring bar storage apparatus configured to store the boring bar when the boring bar is to be exchanged;
a frame arranged under the magazine with respect to a vertical direction;
a guide rail arranged on the frame, wherein the magazine is connected to the guide rail and wherein a longitudinal axis of the guide rail extends in a lateral direction perpendicular to the vertical direction such that the magazine moves along the guide rail in the lateral direction;
an actuator configured to rotate the magazine; and
a main shaft configured to fix the workpiece and rotate the workpiece so as to machine the workpiece, wherein a longitudinal center axis of the main shaft and a longitudinal center axis of the workpiece are aligned with one another so as to be concentric, wherein
a longitudinal direction extends perpendicular to the lateral direction and perpendicular to the vertical direction,
the magazine and the guide rail are positioned, with respect to the longitudinal direction, in their respective entireties, on a first side of the main shaft, and
when the boring bar is machining the workpiece with the tool, the boring bar and the boring bar storage apparatus are positioned, with respect to the longitudinal direction, in their respective entireties, on an opposing second side of the main shaft.
2 . The machine tool of claim 1 , wherein the magazine comprises:
a rotation plate rotated by the actuator; and
a plurality of holders arranged at an outer surface of the rotation plate, each of the plurality of holders capable of holding the tool.
3 . The machine tool of claim 1 , wherein the magazine is rotated with respect to the longitudinal direction.
4 . The machine tool of claim 1 , further comprising:
a cylinder installed at the frame to move the magazine along the guide rail.
5 . The machine tool of claim 1 , further comprising:
a bracket movably connected to the guide rail, the magazine being rotatably connected to the bracket, and the actuator being installed at the bracket.
6 . The machine tool of claim 1 , wherein the actuator comprises a servo motor.
7 . The machine tool of claim 1 , wherein the magazine is arranged between a spindle exchanger and the main shaft.
8 . A method of exchanging a tool of a boring bar using the machine tool of claim 1 , the method comprising:
providing the machine tool of claim 1 ;
arranging the magazine, which includes a plurality of holders configured to store tools, along the lateral direction;
rotating the magazine to locate one of the plurality of holders with a new tool at an exchange position;
arranging the boring bar attached with the tool at a front of the magazine; and
exchanging the tool attached to the boring bar for the new tool.
9 . The method of claim 8 , wherein arranging the magazine comprises moving the magazine along the guide rail.
10 . The method of claim 8 , further comprising:
returning the magazine to an original position along the guide rail after exchanging the tool attached to the boring bar for the new tool.