A machine tool includes a workpiece holder, a tool holder holding working tools that includes a hob cutter used in a rough machining and a skiving cutter used in a finish machining, a tool magazine, a tool replacing device replacing one of the working tools mounted on the tool holder with the other of working tools housed in the tool magazine, a rough machining controlling section performing the rough machining on the workpiece, a tool measuring device measuring a position of a blade in a rotation direction of the skiving cutter, an angle correcting section correcting a rotation angle of the skiving cutter based on a result measured by the tool measuring device, and placing a tooth space formed in the workpiece and an edge tip of the blade in a position corresponding to each other, and a finish machining controlling section by which workpiece is finish machined.

The present disclosure relates to a tool magazine of a machine tool such as a moving column-type machining center, in which a magazine unit is installed on a saddle, a tool accommodated in a gripper part of the magazine unit is loaded or unloaded in a direction perpendicular to a tool axis, and a gripping part of a change arm directly grips a flange portion of the tool at the time of changing the tools by means of a tool changing part movably installed on the saddle and a tool changing part transfer part configured to move the tool changing part independently of a column, thereby reducing tool change time, improving productivity, minimizing a collision or mechanical interference, and improving stability and reliability in the medium-sized or large-sized machine tool having a length in a width direction.

The present disclosure relates to a machine tool, such as a moving column-type machining center, and a method of operating the same, which are capable of shortening tool change time, improving productivity, minimizing a collision or mechanical interference, and increasing stability and reliability in a medium-sized or large-sized machine tool having a long length in a width direction by means of a magazine installed on a saddle, a tool changing unit movably installed on the saddle, and a tool changing unit transfer part configured to move the tool changing unit independently of a column.

Provided is a compact tool changer. The vertical machine tool includes a frame, a spindle, a moving device for moving the spindle, a magazine including a plurality of pots that move up and down installed in a pot holder, a pot lifter for moving up and down the pot at a pot tool changing position, and an intermediate arm assembly that moves among a magazine position, an intermediate position, and a spindle position. The intermediate arm assembly includes an arm having a first gripper and a second gripper, and an arm rotation device for positioning the first gripper or the second gripper to either a pot phase or a spindle phase.

The disclosure provides a method and system for injecting cutting fluid during milling under different working conditions. By analyzing influence of an airflow field in a milling area under different working conditions on injection of cutting fluid, an influence rule of a helical angle and a rotation speed of a cutter on the flow field is quantitatively analyzed, an optimal target distance of a nozzle, an angle between the nozzle and a milling cutter feeding direction and an angle between the nozzle and the surface of a workpiece are comprehensively determined, the nozzle is set according to a determined setting manner, and lubricating oil is sprayed to the milling area by utilizing the nozzle.

An automatic tool changer includes a cover that partitions a machining area and a non-machining area, and an opening/closing member that opens/closes an opening of the cover by turning in synchronization with rotation of a tool changer magazine. The opening/closing member includes a plate section partitions the machining area and the non-machining area at a position of the opening of the cover. In a case where the tool changer magazine performs tool replacement with respect to a tool storage magazine, the plate section closes the opening of the cover by taking a horizontal posture. In a case where the tool changer magazine performs tool replacement with respect to a main spindle, the plate section opens the opening of the cover by changing its posture from the horizontal posture to an inclined posture or a vertical posture.

The disclosure provides a method and system for milling injected cutting fluid under different working conditions. By analyzing influence of airflow fields in a milling area under different working conditions on injection of cutting fluid, an influence rule of a helical angle and a rotation speed of a cutter on the flow field is quantitatively analyzed, an optimal target distance of a nozzle, an angle between the nozzle and a milling cutter feeding direction and an angle between the nozzle and the surface of a workpiece are comprehensively determined, the nozzle is set according to a determined setting manner, and lubricating oil is sprayed to the milling area by utilizing the nozzle.

A fast tool changing method with pre-unclamping step for controlling operations of the spindle, tool unclamping cylinder, and tool changing arm. The spindle has one end clamping the tool at the clamping position. The method includes following steps. In a tool pre-unclamping step, the clamp end of the spindle moves the used tool to a pre-unclamping position; the tool unclamping cylinder pushes the used tool to leave a taper of the spindle. In a tool changing step, the tool changing arm rotates to clamp the used tool and pulls the used tool away from the clamp end, and further aligns a target tool with the clamp end. In a tool inserting step, the tool changing arm inserts the target tool into the clamp end, to be clamped therein. Therefore, the tool unclamping and tool clamping operations are accelerated.

A high-precision manufacturing machine used in precision manufacturing processes, such as a 3-D printer, is described. The machine has a frame, a movable platform supported by and movable relative to the frame, on which are mounted one or more platform tool holders for holding one or more tools such as an extruder, a base station that may include one or more bays, each of the bays having a number of base station tool holders, for storing tools that are not in use, and a supporting base, which may be movable relative to the frame, for holding one or more work items to be processed by the tool or tools selected and held by the movable platform.

A machine tool includes a spindle, a tool exchanger that attaches or detaches one of tools to or from the spindle, a spindle mover that moves the spindle to one of tool exchange coordinates when the one of the tools is to be attached or detached by the tool exchanger, and a tool exchange controller that controls, when the one of the tools is to be attached or detached by the tool exchanger, the spindle mover so as to move, on the basis of a first tool exchange coordinate associated with an attaching-target tool to be attached to the spindle and a second tool exchange coordinate associated with a detaching-target tool to be detached from the spindle, among a preliminarily-set plurality of the tool exchange coordinates respectively associated with the tools, the spindle to one of the tool exchange coordinates that are the first tool exchange coordinate and the second tool exchange coordinate, whichever is farther from a machining point.