Abstract:
Disclosed is a boring bit, specially a multiblade boring bit, preferably with a point symmetric cutting-edge arrangement having main and secondary cutting-edges that are tilted towards the axis of the boring bit. In order to stabilize the tool against vibrations caused by the cutting force, the secondary cutting-edge is tilted along an effective length that is substantially axial in the direction of cutting, thereby having a negative tool side rake ( gamma *).
Abstract:
The invention relates to a vacuum chamber for coating items (10) in which a physical vapor deposition method (PVD) is carried out. The aim of the invention is to create a vacuum chamber of the aforementioned kind which can be provided with modular cathodes. For this purpose, the vacuum chamber is provided with a plurality of receiving devices in which a plurality of cathodes each can be arranged. A first receiving device (30) for receiving one or more cathodes (40, 42, 44, 46) is provided substantially in the center of the vacuum chamber (20) and two additional receiving devices (32, 34) for receiving at least one cathode (48, 50, 52, 54) each are provided on the edges of the vacuum chamber (20) in a door-like manner.
Abstract:
Um eine Vakuumkammer zum Beschichten von Gegenständen (10), in der ein physikalisches Abscheideverfahren (PVD) durchgeführt werden kann, modular mit Kathoden bestücken zu können, wird vorgeschlagen, eine Vielzahl von Aufnahmeeinrichtungen vorzusehen, in die jeweils mehrere Kathoden angeordnet werden können. Eine erste Aufnahmeeinrichtung (30) zur Aufnahme von einer oder mehrerer Kathoden (40, 42, 44, 46) ist im wesentlichen in der Mitte der Vakuumkammer (20) und zwei weitere Aufnahmeeinrichtungen (32, 34) zur Aufnahme von zumindest jeweils einer Kathode (48, 50, 52, 54) sind türartig am Rand der Vakuumkammer (20) vorgesehen.
Abstract:
Disclosed is a cutting tool, in particular a drill, milling cutter, thread-cutter, reamer or core drill, with a shaft and a cutting part provided with at least one cutting edge for machining a work piece while removing cuttings. The cutting part is provided with a sliding layer of lower hardness than a foundation layer of the cutting part.
Abstract:
The invention provides a tool-holding fixture (10) for tools supplied with coolant or lubricant, especially lathe tools such as drilling or milling tools, with an internal channel system for supplying coolant or lubricant to the shank of the tool. To provide greater flexibility in the use of machine tools the claimed tool-holding fixture (10) is equipped with a coolant or lubricant reservoir (24) that is integrated in the tool-holding fixture, is preferably refillable and pressurizable, can be disconnected from a coolang or lubricant source when the tool is in operation and supplies the tool with an adjustable amount of coolant and lubricant by means of a metering device (38).
Abstract:
To improve the result of a glow discharge process is disclosed to be performed in a Physical Vapor Deposition (PVD) coating apparatus comprising a door, at least 2 lateral rotating cathodes with targets. The apparatus is equipped by rotating shields or tube shutters (4). The method comprises the steps of operating the apparatus so that the arc of said second electrode (2) burns directly to said door. The rotary shield or tube shutter on a first electrode (1) is open and said rotary shield or tube shutter (4) on a second electrode (2) is closed. Then a positive potential is applied on said first electrode (1), so that a potential between said second electrode (2) and said first electrode (1) is applied. The positive potential applied on said first electrode (1) is selected so that the electron stream does not burn only against the door since the electrons being affected by the higher potential to said first electrode (1). (Figure 1)