The tool holding device includes: a casing including a first surface, a second surface opposed to the first surface, and a first projection and a second projection projecting opposite to the first surface from the second surface; a first tool holding part disposed on the first surface at a position opposed to the first projection; a second tool holding part disposed on the first surface at a position opposed to the second projection; a driving-force input unit disposed at the end of the first projection and rotated by driving force being inputted; a first shaft extending in an axial direction perpendicular to the first surface and the second surface, the driving-force input unit and the first tool holding part being disposed at one end and the other end of the first shaft, respectively; a second shaft extending in the axial direction and having one end housed in the second projection, the second tool holding part being disposed at the other end of the second shaft; and a rotation transmitting unit rotating the second shaft in response to rotation of the first shaft.

The present disclosure discloses a cutting method for an aluminum alloy casting, and a trimming die. The cutting method for the aluminum alloy casting includes the following steps of: drilling a part to be cut off of the aluminum alloy casting by multiple annular drills, and withdrawing the annular drills when the annular drills drill to a preset position; and separating multiple scraps to be separated from the aluminum alloy casting by the trimming die.

The present disclosure discloses a cutting method for an aluminum alloy casting, and a trimming die. The cutting method for the aluminum alloy casting includes the following steps of: drilling a part to be cut off of the aluminum alloy casting by multiple annular drills, and withdrawing the annular drills when the annular drills drill to a preset position; and separating multiple scraps to be separated from the aluminum alloy casting by the trimming die.

A drilling method of machining holes that are not regularly arranged in one direction in a short machining time is provided. A drilling method, includes: creating a machining order of machining a first hole to be machined with a first spindle and a second hole to be machined with a second spindle for a workpiece having a plurality of target holes on a machining table, the first spindle and the second spindle arranged in X direction; rotating the machining table relative to the first spindle and the second spindle so that the first hole and the second hole are arranged in X direction with the first hole located nearer to the first spindle; moving the first spindle and the second spindle relative to the machining table so that the first hole and a center of the first spindle are aligned and the second hole and a center of the second spindle are aligned; and machining the first hole with the first spindle and the second hole with the second spindle.

A drilling device is provided and has a driving assembly disposed on a base for rotating a plurality of drills. As such, a plurality of drills can be actuated synchronously at a time point to effectively improve the production efficiency and reduce the drilling cost.

An upper drill tool including a central chuck, an upper component, a lower component and a coupling assembly. The central chuck has a chuck base and a chuck structurally configured to retain a drill bit. The upper component is attached to the central chuck and has a lower stop surface. The lower component has a central body and an outer ring that threadedly engages the central body, with the outer ring having an upper stop. The coupling assembly is configured to facilitate the slidable movement of the lower component from a first orientation wherein the upper stop is spaced apart from the lower stop surface and a second orientation wherein the upper stop is in abutting engagement with the lower stop surface, with the first orientation and the second orientation defining a stroke.

Methods and apparatus for forming holes through a substrate are provided herein. In some embodiments, a method of forming holes in a substrate for use in a process chamber includes: partially forming the plurality of holes in a substrate using a first drill to form a plurality of rough holes through the substrate from a first side of the substrate to an opposite second side of the substrate; positioning the substrate between a second drill and a third drill; using the second drill to finish the plurality of rough holes from the first side of the substrate to a first location at least halfway along the length of each hole of the plurality of rough holes; and using the third drill to finish the plurality of rough holes from the second side of the substrate to at least the first location along the length of each hole of the plurality of rough holes.

A machine for producing two or more drill holes in a surface of a panel. The machine includes a feeding device for feeding the panel in a feeding direction and a drilling device including two or more drilling units. The drilling units are displaceable relative the surface in a drilling direction which is at an acute angle relative the surface of the panel.

A centering guide cage apparatus for interior wall drilling includes a drill-bit holder, a flange bearing, a centering guide cage, a flexible casing, a hand-grip turnbuckle, and a flexible drill shaft. The centering guide cage, equipped with plurality of shape-memory supports, is terminally connected to an outer race of the flange bearing. The centering guide cage is terminally connected a distal end of the flexible casing from the opposite end. The hand-grip turnbuckle is terminally pressed against a proximal end of the flexible casing. A distal end of the flexible drill shaft is terminally connected to the drill-bit holder as the flexible drill shaft traverses through the flange bearing, the centering guide cage, the flexible casing, and the hand-grip turnbuckle. The flexible drill shaft is radially connected within an inner race of the flange bearing, wherein a proximal end of the flexible drill shaft is engaged with a drill driver.

A handle is coupled to an industrial machine tool, along with a method of operating the industrial machine tool via the handle. The handle comprises a housing, a first switch, and a second switch. The housing includes a first side, a second side, a top end, and a bottom end, the first side facing toward the industrial machine tool and the second side facing away from the industrial machine tool. The first switch actuates a float mode for the industrial machine tool, the float mode being a mode in which movement of a moveable portion of the industrial machine tool is power assisted for an operator of the industrial machine tool. The second switch actuates a machining portion, coupled to the moveable portion of the industrial machine tool, to perform a machining process on a workpiece.