The desktop milling machine with an ovate-shaped bridge is a desktop milling machine of the computer numerical control (CNC) type having a portion of the bridge or frame structure configured to alleviate bridge deflections and deformations that are caused during the high-speed milling processes. Preferably, the bridge has an ovate arch, or has a rear face having an ovate contour.

A machining center, comprising: a number N of workpiece tables equal to or greater than three, a number N of first guides, which extend parallel to a first direction; along said first guides being movable respective to workpiece tables, one for each first guide, a number N−1 of second guides, which extend parallel to a second direction transverse to said first direction, a number N−1 of machining groups each comprising at least one machining head; each machining group being movable parallel to said second direction along a respective second guide; a number N×(N−1) of machining areas wherein the machining groups can operate on workpieces present on said tables; along each first guide, or for a respective table, there being present N−1 machining areas, one for each machining group, so that each machining group can operate, according to a programmed work cycle, on all said N workpiece tables, a number N of workpiece loading/unloading areas, one for each workpiece table.

A machining center includes a number N of workpiece tables. A number N of first guides extend parallel to a first direction. Along the first guides is movable respective to workpiece tables, one for each first guide. A number N-1 of second guides extend parallel to a second direction transverse to the first direction. A number N-1 of machining groups each include at least one machining head. Each machining group is movable parallel to the second direction along a respective second guide. A number N×(N-1) of machining areas is provided. The machining groups can operate on workpieces present on the tables. Along each first guide, or for a respective table, there is present N-1 machining areas, one for each machining group, so that each machining group can operate, according to a programmed work cycle, on all the N workpiece tables.

A machining center for machining profiles may include: a base having a longitudinal axis, the base defining a work surface extending with first and second ends along the longitudinal axis, wherein the base is configured to receive a profile manually laid along the longitudinal axis of the base by an operator or by a specially-designed automatic feeder; a plurality of support and lock members for supporting and locking the profile on the base, wherein each of the support and lock members can be placed on respective profiled guides which extend parallel to the longitudinal extent of the base between the first and second ends, and wherein each of the support and lock members is displaceable independently along the longitudinal extent of the base; a pair of vertical columns, each of the columns supporting at least one first motorized spindle; and/or a portal structure, comprising an upper beam, above the base.

A numerical-control machine tool is provided and includes a load-bearing beam which extends horizontally, has two axial ends resting in sliding manner on two lateral shoulders that rise from a basement and extend horizontally side by side so as to define a longitudinal corridor orthogonal to the longitudinal axis of the beam; a spindle-holding carriage which is movable on the load-bearing beam parallel to the longitudinal axis of the beam; a spindle-holding shaft which is fixed to the spindle-holding carriage in a vertical position, and is movable on the spindle-holding carriage parallel to its longitudinal axis; a front wall and a rear wall that close the two ends of the longitudinal corridor; an upper cover which closes the longitudinal corridor at the top; and an ambient conditioning unit which is adapted to bring and maintain the temperature of the air present inside the machining chamber around a given target value.

A numerically controlled machine tool that can accurately control a position of a machining member for machining a workpiece. The numerically controlled machine tool comprises: a first post member installed on a main body slidingly in a left/right direction; and first, second and third horizontal rails installed on the main body lengthily in the left/right direction and respectively coupled to two points of the rear surface and one point of the front surface of the first post member for guiding sliding of the first post member.

A numerical-control machine tool is provided and includes a load-bearing beam which extends horizontally, has two axial ends resting in sliding manner on two lateral shoulders that rise from a basement and extend horizontally side by side so as to define a longitudinal corridor orthogonal to the longitudinal axis of the beam; a spindle-holding carriage which is movable on the load-bearing beam parallel to the longitudinal axis of the beam; a spindle-holding shaft which is fixed to the spindle-holding carriage in a vertical position, and is movable on the spindle-holding carriage parallel to its longitudinal axis; a front wall and a rear wall that close the two ends of the longitudinal corridor; an upper cover which closes the longitudinal corridor at the top; and an ambient conditioning unit which is adapted to bring and maintain the temperature of the air present inside the machining chamber around a given target value.

A machine tool includes: a spindle head; a spindle rotatably supported on the spindle head; a chuck unit configured to chuck a tool inserted in an axis direction of the spindle; a tool holder configured to hold the tool attached to the chuck unit; and a rotary arm configured to move the tool holder to a reachable position of the spindle. The tool holder is supported on the rotary arm by a support mechanism, and the support mechanism includes a displacement following mechanism configured to support the tool holder on the rotary arm in a manner to be capable of displacing the tool holder in a direction intersecting an axis of the tool.

A fabrication system may generally comprise an x-y positioning assembly, a clamping head to receive an end effector, wherein the clamping head is coupled to the x-y positioning assembly, a z positioning assembly, a platform including a surface that is rigid and substantially planar, wherein the platform is coupled to the z positioning assembly, and a controller operably coupled to the x-y positioning assembly, end effector, z positioning assembly, and platform. Methods of using the fabrication system are also described.

A machining center for performing a plurality of machining operations, such as drilling, milling, cutting, using rotating tools, on metal profiles having a longitudinal extent greater than their cross-section dimension, particularly but not exclusively made of aluminum. The machining center comprises a base defining a work surface extending longitudinally with first and second ends, upon which the profile is manually laid by an operator or by a specially-designed automatic feeder. The base has a plurality of members thereon for supporting and locking the profile, as well as a pair of vertical columns for supporting motorized spindles, each column being located next to said base and being configured to being displaced in either direction, parallel to the longitudinal extent of the base along respective slide guides located next to said base. Each vertical column is equipped with a first carriage configured to vertically sliding in either direction along its respective column and with a second carriage mounted to the first carriage, and configured to sliding in either direction perpendicular to its respective column. The center also comprises a portal structure whose upper beam above said base is equipped with a motorized spindle for rotating tools, mounted to a support body configured to angular displacements around a pivot for rotating about a first axis parallel to the longitudinal extent of the base.