摘要:
Method and device for marking a workpiece surface (2A) of a metal workpiece (2), in which a welding torch (3) comprising a welding wire electrode (4) is guided along the workpiece surface (2A) to be marked and meanwhile a wire end (4A) of the welding wire electrode (4) is moved towards and away from the work-piece surface (2A) to be marked, wherein an electric voltage (U) present at the welding wire electrode (4) and/or an electric current (I) flowing through the welding wire electrode (4) bring about electric sparks, which bring about material removal and/or material alteration at the workpiece surface (2A) of the metal workpiece (2) to mark the workpiece surface (2A).
摘要:
Proposed is a fluid dynamic bearing system having a bearing bush, a shaft rotatably supported in a bearing bore of the bearing bush and a hub connected to the shaft. A bearing gap filled with bearing fluid and having an axial section is defined between the shaft, the bearing bush and the hub. A first and a second fluid dynamic radial bearing are disposed along the axial section of the bearing gap, the radial bearings being marked by grooved bearing patterns on the associated bearing surfaces of the shaft and/or of the bearing bush. The two radial bearings have a mutual distance dL measured from an apex line of the first radial bearing to an apex line of the second radial bearing. A separator groove is disposed in the bearing bush or in the shaft in the axial section of the bearing gap between the two radial bearings and has an axial length lS. According to the invention, the ratio between the distance dL and the length lS 6is greater than 5 (five).
摘要:
The present invention describes a method for marking an object (18), the object (18) having a surface of a conductive material. The method comprises a step of applying an electric spark to the surface such that the material is at least one of partially melted and partially ablated by the electric spark, thereby forming a pattern on the object (18). Further, the present application relates to a marking system (10) for marking an object (18) using a spark generator (12) having a counter electrode (14) and a connector (16) for electrically connecting the spark generator (12) to the surface of the object (18) to be marked. Further, the present application relates to an authenticating system for authenticating or identifying an object (18) marked by the above described method for marking the object (18).
摘要:
A method is disclosed for marking a tool. The method includes the steps of providing a tool, providing a rustproof layer on the tool, providing a printed layer on the tool, and providing at least one electroplated layer on the tool. The step of providing the rustproof layer includes the step of electroplating or hot-dip galvanizing the tool. The thickness of the electroplated layer is larger than or identical to that of the colored layer.
摘要:
The invention relates to a method for manufacturing a tool electrode for the electrochemical machining of workpieces, particularly for components for fluid bearings with the following processing steps: (a) Providing an electrode body made of a conductive base material which has an essentially smooth surface; (b) Coating the surface of the electrode body with an insulating material; (c) Removing the insulating material from locations on the surface of the electrode body that correspond to a pattern which is to be formed on the surface of the piece by means of electromechanical machining.
摘要:
Electrode-driver circuits for use with non-contact spark-discharge imaging systems. The circuits rapidly produce short-duration, high-voltage pulses that cause the discharge of a spark to the surface of a printing plate; they feature short rise times, rapid operation and clean decays, thereby facilitating high-speed spark-discharge imaging.
摘要:
Disclosed is an electrode for electrical discharge used for diesinking, comprising an electrode member produced by subjecting a base and binder of gypsum hemihydrate powder and a filler of conductive metal powder to modeling and/or molding and setting into a desired form of electrode, and followed by plating the electrode member with a conductive metal; and a process for manufacturing the same, wherein a gypsum hemihydrate powder, a gypsum dihydrate powder in an amount of 1% by weight of the gypsum hemihydrate powder and a conductive metal powder are kneaded in vacuo, and water is added thereto to continue further kneading in vacuo, followed by casting into a mold having a predetermined shape transferred thereon to carry out hydration, molding and setting to provide an electrode member; after the electrode member is dried, it is plated with a conductive metal to enhance mutual continuity in the conductivity of the former conductive metal powder and also to form a thin metal layer on the surface of the electrode member. Since the present electrode for electrical discharge machining is based on a gypsum, even one having a subtle and complicated shape can easily be produced using an easy-to-make mold made of a silicone rubber and the like with high accuracy at low cost, so that it is particularly suitable for producing dental crown and bridge one by one. Further, the strength of the electrode is enhanced synergistically by the base of gypsum hemihydrate and the conductive metal layer formed on the surface of the electrode member, allowing precise electrical discharge machining of hard materials such as titanium at the desired speed which was impossible by use of the conventional electrode impregnated with a conductive solution containing a graphite and the like dispersed therein instead of the plating treatment.
摘要:
A circuit fabrication device (10) is used to develop production or prototype circuits. A circuit board (16) having a conductive layer (26) provided thereon is placed in a plotter (14). An electrode (20) connected to a power supply (18) "draws" on the circuit board, thereby vaporizing piortions of the conductive layer patterned conductive regions (30) are thus formed on the conductive layer separated by isolation regions (28) where the portions of the conductive layer have been removed by vaporization in defining a circuit pattern on the conductive layer of the circuit board.
摘要:
An automatic method to repair circuit shorts and near-shorts present in narrow bridges or remnants of bridges between circuit lines. By applying a voltage across a pair of lines, certain electrical phenomena take place at the area of the short or near-short. The electrical phenomena thus generated induce a localized etching in either a gas-phase or liquid-phase medium depending upon which embodiment is used.