An arrangement for forming grooves in a board element. The arrangement includes a support member for supporting the board element during the forming and cutting elements arranged on a spindle member configured to rotate around a rotational axis. The cutting elements are configured to form the grooves by removing material from the board element. The spindle member is arranged in a pivot body configured to be pivoted with respect to the support member. The arrangement includes a driving device configured to drive the pivot body, wherein the driving device is configured to rotate in a single direction during a groove forming cycle.

A material bar magazine for guiding material bars on an automatic lathe and a system having such a magazine and automatic lathe having at least one headstock that is displaceable along a longitudinal axis of the material bar magazine, where the material bar magazine includes a material bar-guiding channel system having a channel opening system. Further, the channel system of the material bar magazine has a first, outer guide channel and a second, inner guide channel mounted inside the first guide channel such that it can move relative thereto along the longitudinal direction, the second, inner guide channel couplable or coupled to the headstock of the automatic lathe for moving the second, inner guide channel as a result of a change in position of the headstock along a longitudinal axis of the material bar magazine in overrun condition synchronously therewith along the longitudinal axis and relative to the first guide channel.

A self-centring device for supporting and guiding bars to be fed to a machine tool, including: a guide body having a through opening, supported rotatably and rotating in a controlled manner around an axis perpendicular to an advancement direction of the bars to be guided, so as to vary the angular orientation thereof around the axis; the guide body is configured to receive and maintain in position the rotating and advancing bars, a return member configured to oppose a suitable preselectable resistance to the rotation of the guide body around the axis so as to maintain a firm coupling and contact of the guide body with the advancing bar, a manual selector member configured to adjust a position and control the angular movement of the guide body. The manual selector member includes a screw arrangement cooperating with an oscillation limiting element to set an angular rest position of the guide body in function of the geometry of the bar to be received and guided to said machine tool.

A machining apparatus for machining optical lenses has a horizontally aligned conveyor section for transporting containers containing at least one optical lens, the conveyor section extending between an entry and opposite exit side of a module. The machining apparatus has a container buffer store and a container transport device, the latter being designed to retrieve containers from the conveyor section and to store said containers in the container buffer store and to transport containers back onto the conveyor section. A workpiece handling station having at least one parking space is provided for one container. The container transport device transports containers from the container buffer store to at least one parking space. A handling device of workpiece handling station retrieves optical lenses from a container standing on a parking spaces and transfers said container to a machining station. Moreover, the invention relates to a manufacturing system having two such machining apparatuses.

Covering device suitable for an apparatus for feeding bars to a machine tool, includes: a support frame, rotatably connectable, by first hinge elements, to a frame structure of the feeding apparatus, a cover element rotatably connected, by second hinge elements, to the support frame. The first hinge elements and the second hinge elements are arranged on respective longitudinal sides, opposite one another, of the support frame and are configured to enable the covering device to be opened, at will, both from one side and the other side of the feeding apparatus. On the cover element a slit opening is obtained that extends longitudinally, configured to enable bars to move from external auxiliary storage to a drum of the feeding apparatus.

Centring device for centring bars, tubes or similar to supply to a spindle of a machine tool, includes: a support base body, along which a through opening is obtained for the passage of the bar, oblong centring elements, connected rotatably to the support base body and arranged circumferentially with respect thereto to maintain the bar axially aligned on the spindle of the machine tool, an elastic element arranged for urging elastically the oblong centring elements to a radial collecting and contraction position in which they are in mutual proximity.

An apparatus includes a self-centring device for centring and guiding a bar, tube or the like to be advanced to a spindle of a machine tool, includes a hollow containing body with through opening having a longitudinal axis, for receiving a bar to be fed along an advancement direction to the spindle; in the body an inner sliding surface is defined that is tilted with respect to the longitudinal axis; centring and guiding elements are provided housed in the hollow body and shaped for coming into contact with the bar and exert thereupon a distributed centring and guiding action; the centring and guiding elements that are slidable along the inner surface for the distance thereof from the longitudinal axis to adapt to different bar diameters; in the body an elastic member is housed to urge the centring and guiding elements to the position of minimal reciprocal distance so as to induce and maintain, during operation, the centring and guiding elements in contact with the surface of the bar. An advancement device is further disclosed for the bar, having a supporting and guiding member configured for restingly receiving, from a first side, a bar and configured for guiding said bar along an advancement direction, a movable grasping member mobile from a disengaged position, further from the member to be separated from the bar, to a locking position, nearer said supporting member to press longitudinally the bar from a second opposite side against the supporting member; advancement motor device is configured for rotating the supporting and guiding member and/or the movable grasping member in the locking position to draggingly advance the bar along the advancement direction.

An automatic machining device for shaft body includes a blank cutting mechanism and an automatic blank feed mechanism arranged at one side of the blank cutting mechanism, wherein, a machining platform is arranged at one side of the automatic blank feed mechanism, and a numerical control machine tool is arranged above the machining platform, thus realizing automatic cutting, feeding and machining of blanks.

An automatic machining device for shaft body includes a blank cutting mechanism and an automatic blank feed mechanism arranged at one side of the blank cutting mechanism, wherein, a machining platform is arranged at one side of the automatic blank feed mechanism, and a numerical control machine tool is arranged above the machining platform, thus realizing automatic cutting, feeding and machining of blanks.

The machine tool comprises a headstock provided with a main spindle; a driving unit which moves the headstock in a main spindle axial direction and has a feed mechanism extended in the main spindle axial direction and a front end supporter which rotatably supports a front end of the feed mechanism; a first front cover mounted on the headstock in a first position between the main spindle and the feed mechanism with respect to a diameter direction from a main spindle axis toward the feed mechanism; and a second front cover mounted on the front end supporter in a second position between the main spindle and the feed mechanism. Part of the feed mechanism is covered by both of the first front cover and the second front cover when at least part of the first front cover is on the rear side of the second front cover.