Machine tool, comprising at least two workpiece carrier assemblies (11), each including a workpiece carrier (12), said workpiece carrier assemblies (11) being supported on respective workpiece carrier support (1) for horizontal movement in a first direction in parallel with a horizontal Z axis; at least a first tool carrier (21), supported on a tool carrier support (2) for horizontal movement in a second direction, said first tool carrier (21) being displaceable in said second direction between at least one operative position (A) in which said first tool carrier (21) is facing one of said workpiece carrier assemblies (11), and at least one inoperative position in which said first tool carrier (21) is not facing any workpiece carrier assembly (11). The invention also relates to a method of machining a connecting rod using the machine tool.

A machine tool system includes: a machine tool that machines a workpiece by using a tool attached to a spindle; and a plurality of robots installed inside a machining space of the machine tool and adapted to grip the workpiece and move the workpiece in conformity with the machining performed by the machine tool.

A conveyance apparatus includes two clamp mechanisms. Each of the clamp mechanisms is configured to freely change its state among a fully clamping state, a semi-clamping state, and a non-clamping state. When an object is delivered from a first clamp mechanism that is holding the object to a second clamp mechanism, the second clamp mechanism is brought into the semi-clamping state to temporarily hold the object. Then, the first clamp mechanism is brought into the non-clamping state and the second clamp mechanism is brought into the fully clamping state.

A tool carrier assembly for use at a machine tool, which includes at least one workpiece-carrying spindle for rotatably driving a workpiece received in the workpiece-carrying spindle. The tool carrier assembly includes a first slide being movable in a first direction, a tool carrier being supported on the first slide and configured to hold a plurality of tools, a tool drive unit including a tool drive for engaging with one of the plurality of tools held by the tool carrier to rotatably drive said tool, when tool is arranged at a tool drive position with respect to the tool drive, and a drive mechanism for driving movement of the first slide together with the tool carrier in the first direction relative to the tool drive position, when the tool drive is disengaged with tool, to relatively move another tool of the plurality of tools into the tool drive position.

A tooling assembly for a lathe machine includes a tool platform configured to be mounted on the lathe machine, a milling tool holder fixedly secured to the tool platform and workable to releasably secure a thread milling tool therein, and a milling tool drive. The milling tool drive is operatively connected to the milling tool holder and operable to rotate the milling tool holder independently of a work holder to mill threads on the workpiece when a pipe thread milling tool is secured in the milling tool holder. Computer numerical control threading lathes and methods of milling threads in tubular workpieces are also described.

A mechanism for machining a workpiece includes a fixing base, a driving member, a connecting member, a cutter, a first guiding sleeve, and a spring. The driving member is positioned above the fixing base. The connecting member is coupled to the driving member. One end of the cutter is fixed to the connecting member, and the cutter is passed through the fixing base to machine the workpiece positioned under the fixing base. The spring is positioned between the connecting member and the fixing base. The spring is compressed when the driving member drives the cutter away from the fixing base to machine the workpiece, and the spring restores to bring the cutter back toward the fixing base after the machining.

The invention relates to a machining device for the machine-assisted production and machining of dental workpieces (16), particularly of artificial teeth and/or other dental replacement parts, the at least one workpiece (16) being clamped in at least one workpiece retainer (11) which can be raised, lowered and rotatably driven, is positioned on a rotational axis (9), and, for the purpose of machining, feeds said workpiece (16) to at least one tool spindle (4, 5, 6) that is rotationally driven and has a tool (7) secured thereto, an additional tool retainer (2, 2a, 2b) with a plurality of tools (7) arranged thereupon being associated with said workpiece retainer (11, 11a, 11b) and lying opposite on one side thereof, and a workpiece changer (22, 22a, 22b) which receives the workpieces (16, 16a, 16b, 16c) to be machined, such that they can be exchanged, being arranged on the other side of said workpiece retainer (11, 11a, 11b).

An NC lathe including a first spindle, a second spindle capable of holding a cut-off workpiece delivered from the first spindle, a second tool post on which a plurality of tools are attachable to machine the workpiece held by the second spindle, a product receiver provided on the second tool post, a Y2-axis motor capable of moving at least one of the second tool post and the second spindle in a Y2-axis direction, and an X2-axis motor capable of moving at least one of the second tool post and the second spindle in an X2-axis direction. The second tool post has a plurality of tool mounting parts where the tools are attachable. The tool mounting parts are aligned at intervals in the Y2-axis direction. At least one of the tool mounting parts is arranged in a position overlapping the product receiver with respect to the X2-axis direction.

A CNC turning and milling machine includes: a base, a moving unit, a spindle unit and a turret unit. The spindle limiting unit and the turret limiting unit are employed to limit the movement range, and the spindle unit and the turret unit are fixed on the upright post to strengthen the overall structural strength and reduce vibration during processing, thereby improving machining accuracy and processing efficiency, while reducing surface roughness.

A machine tool, in particular a multi-spindle and/or double-spindle milling machine, comprising a machine frame, a workpiece clamping device for clamping a workpiece, an axis slide assembly which is arranged on the machine frame and is configured to linearly move the workpiece clamped on the workpiece clamping device by way of two controllable linear axes in a Y-direction and a Z-direction, and a spindle carrier assembly, which is arranged on the machine frame and has at least two tool-carrying work spindles that can be moved independently of each other in an X-direction which is perpendicular to the Y-direction and Z-direction.