Abstract:
Aromatic molecules are seeded on a surface of a growth substrate; and a layer {e.g., a monolayer) of a metal dichalcogenide is grown via chemical vapor deposition on the growth substrate surface seeded with aromatic molecules. The seeded aromatic molecules are contacted with a solvent that releases the metal dichalcogenide layer from the growth substrate. The metal dichalcogenide layer can be released with an adhered transfer medium and can be deposited on a target substrate.
Abstract:
An apparatus for feeding bars (2) to a machine tool comprises an end (3) suitable for being placed in a position adjacent to a working zone(4) in which spindle means (5) of the machine tool are provided; a drum element (6), close to the end (3) and rotatable around a rotation axis (X); movable supporting means (7) provided on the drum element (6) for supporting and guiding a bar (2) parallel to the rotation axis (X). The movable supporting means (7) are slidably drivable on the drum element (6) parallel to the rotation axis (X) between a disengagement retracted configuration (R), in which the movable supporting means (7) are gathered nearer the working zone (4) to enable a respective bar (2) to be loaded, and an engagement extended configuration (E), in which the movable supporting means (7) are spaced away from the working zone (4) and are distributed along a supporting zone (S), opposite the working zone (4) with respect to the drum element (6), to engage the respective bar (2) to be supported and guided during machining. The movable supporting means (7) comprise telescopic tubular means (8) configured for being received, in said disengagement retracted configuration (R), inside tubular housing and guiding means (9) suitable for coupling with the spindle means (5). The telescopic tubular means (8) define, in the engagement extended configuration (E), a cylindrical containing structure configured for enclosing and supporting in a distributed manner a respective bar (2) along the entire supporting zone (S), so as to prevent the bar (2) from flexing because of the centrifugal actions generated by the rotation.
Abstract:
本発明の表面被覆切削工具は、基材と該基材上に形成された被覆膜とを含むものであって、該被覆膜は、耐摩耗層と耐溶着層とを少なくとも含み、該耐摩耗層は、TiおよびAlを含む窒化物からなるA層とAlおよびCrを含む窒化物からなるB層とが交互に積層された多層構造を有し、かつその結晶構造が立方晶型であり、該耐溶着層は、該被覆膜の最表面に位置し、(Al a Cr b Ti 1-a-b )Nで表わされる窒化物(式中、a+b<0.99、b>0.01、0.2b+0.7<aである)で構成され、かつその結晶構造がウルツァイト型であることを特徴とする。
Abstract:
A machine tool is shown having a first spindle (120) that rotates in a first axis (X2) with a first chuck (122) for holding a first end of a workpiece. A first spindle headstock (124) holds the first spindle (120) and is attached to a base (112). A first turret (130) is mounted on a first turret headstock (132) connected to the base (112) and provides for movement along a parallel axis (Xl) and a first perpendicular axis (Z) relative to the first axis (X2). A second spindle (140) rotates in the first axis (X2) and has a second chuck (142) for holding a second end of the workpiece. A second spindle headstock (144) holds the second spindle (140) and is movably connected to the base (112) to provide movement of the second spindle (140) along the first axis (X2).
Abstract:
The automatic multi-spindle lathe described has its mandrels (9) disposed fixed in a circle. A revolving tool drum (4), with matching diameter and tool disposition, is mounted coaxial to the mandrels so that it can be switched in rotation and which can engage its tools (6) simultaneously into the individual mandrels (9), each tool (6) engaging in all the mandrels (9) during a complete rotation of the drum. Associated with each mandrel (9) is a CNC cross-slide (10, 12) which can work the workpiece (7) unimpeded from the outside during the whole of this rotation. Chip removal and operational comfort can be optimized by asymmetric disposition of the mandrels. The drum (4) can also execute intermediate cycles, thus doubling the number of usable tools (6). A robot (17) can also be linked to the lathe.