摘要:
A cutting tool, especially a drill, milling cutter, screw tap, reamer and core drill, comprising a shaft and a cutting member on which at least one cutting edge is provided for machining a workpiece, the cutting member being provided with a slide layer which has a lower hardness than a base layer of the cutting member.
摘要:
A piezoelectric adjusting mechanism includes a piezoelectric displacing element that is placed in contact with a cutting element and that is provided for displacing the cutting element with regard to a tool shaft. The mechanism also includes a holding mechanism for holding the first displacing element in a determined deformation state. The piezoelectric adjusting mechanism can be used, in particular, for a fine boring tool in order to adjust cutting elements, the elements being arranged on the outer periphery of the fine boring tool, in a radial direction of the fine boring tool.
摘要:
A method is provided for coating objects in a vacuum chamber in which a physical vapor deposition (PVD) can be carried out. The chamber has at least one anode means, at least one cathode and at least one magnetic field source. An arc can be ignited between the at least one anode means and the at least one cathode, and the cathode separates material. The at least one magnetic field can be turned relative to the at least one cathode and the objects to be coated are arranged in the chamber. The magnetic field is turned before the beginning of the coating process so that the separated material does not coat the objects to be coated in the coating process. The arc for the physical deposition process is produced by means of at least two cathodes, said cathodes are constructed as substantially cylindrical tubular cathodes and the at least one magnetic field source is constructed as a permanent or coil magnet arranged in the tubular cathodes and the tubular-cathodes turn about their cylinder axis during the coating process.
摘要:
The invention relates to a hob cutter tool with a coating, wherein the coating is produced by a physical vapor deposition method, in which in a coating chamber in an atmosphere containing nitrogen, an arc discharge is generated in each case between at least one anode and at least one pure Al cathode on the one hand, and at least one pure Cr cathode on the other hand, and in this way, Al and Cr are vaporized from the cathode, in which the hob cutter tool to be coated is rotated in the coating chamber, wherein the tool is subsequently guided past the at least two cathodes, and in which the vaporized Al and Cr is deposited in atomic or ionized form together with nitrogen from the atmosphere containing nitrogen onto the hob cutter tool led rotating past the cathodes. The coating has a multiplicity of layers, composed of (AlCr)-nitride, arranged on top of each other, wherein the multiplicity of layers is formed from two layer types differing with respect to their Al:Cr ratio, wherein a first layer type has an Al:Cr ratio in the range of 55:45 to 65:35, and a second layer type has an Al:Cr ratio in the range of 70:30 to 74:26, and wherein the two layer types alternate with each other in the coating, wherein each of the layers, in turn is formed from a multiplicity of nanolayers arranged on top of each other, and wherein the coating is connected to the tool base body using a bonding layer. Furthermore, the invention relates to a method for recoating such a hob cutter tool.
摘要:
A boring bit, especially a multi-blade boring bit. The bit preferably has 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 cased 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.
摘要:
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).
摘要:
The invention relates to a hob cutter tool with a coating, wherein the coating is produced by a physical vapor deposition method, in which in a coating chamber in an atmosphere containing nitrogen, an arc discharge is generated in each case between at least one anode and at least one pure Al cathode on the one hand, and at least one pure Cr cathode on the other hand, and in this way, Al and Cr are vaporized from the cathode, in which the hob cutter tool to be coated is rotated in the coating chamber, wherein the tool is subsequently guided past the at least two cathodes, and in which the vaporized Al and Cr is deposited in atomic or ionized form together with nitrogen from the atmosphere containing nitrogen onto the hob cutter tool led rotating past the cathodes. The coating has a multiplicity of layers, composed of (AlCr)-nitride, arranged on top of each other, wherein the multiplicity of layers is formed from two layer types differing with respect to their Al:Cr ratio, wherein a first layer type has an Al:Cr ratio in the range of 55:45 to 65:35, and a second layer type has an Al:Cr ratio in the range of 70:30 to 74:26, and wherein the two layer types alternate with each other in the coating, wherein each of the layers, in turn is formed from a multiplicity of nanolayers arranged on top of each other, and wherein the coating is connected to the tool base body using a bonding layer. Furthermore, the invention relates to a method for recoating such a hob cutter tool.
摘要:
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.
摘要:
The invention therefore provides a tool holder for tools supplied with coolant or lubricant, especially rotating tools such as boring or milling tools, with an internal duct system for passing coolant or lubricant to the shank of the tool. To enable particularly flexible use of machine tools, the tool holder is equipped according to the invention with a lubricant reservoir which is integrated into the tool holder and which is preferably fillable and pressurizable, which during operation of the tool can be decoupled from a coolant or lubricant source and supplies the tool controllably with coolant and lubricant via a metering unit.