Abstract:
The invention relates to a process for machining workpieces with two parallel work spindles fitted on a headstock. According to the invention, the distance between the work spindles is altered with the aid of a driven adjuster. The invention also relates to a machine tool for machining workpieces, especially for numerically controlled machining centres, with two work spindles (1, 2) fitted parallel to each other on a headstock (3), where at least one work spindle (2) can be adjusted perpendicularly to its axis.
Abstract:
The invention concerns a machine tool for the cutting process of work pieces, having at least one horizontally lodged work spindle, preferably for high speed and/or high precision processing. Said work spindle displaces on and /or inside a frame-like tool carrier vertically placed on a machine support having slides moving along x-, y- and z-axes. According to the invention, the frame-like tool carrier (3) has an associated frame-like work piece holder (2), which is also placed vertically on the machine support (1). The work piece holder (2) and the tool carrier (3) are interconnected as one single stable unit by one or several connecting means (8) in the area of their upper horizontal traverse (4, 6)
Abstract:
The invention concerns a method of correcting the determination of positions of workpieces and tools which can be moved relative to one another in machine tools, in particular CNC machining centres, by means of measuring systems internal to the machines. Machining inaccuracies caused by changes in the positions of the workpiece and/or tool owing to heat in the working region of the tool can be avoided if the workpiece and tool are moved with associated measuring points or measuring edges through a stationary optical test barrier, simultaneously or at short intervals one after the other. If the test barrier is interrupted, the respective positions of the workpiece and tool are determined by means of the measuring system internal to the machine. The positions determined are compared with stored positions determined during a previous measurement, and the difference between the determined position and the stored position is used to correct the machine control. The invention further concerns a machine for carrying out the method.
Abstract:
The invention relates to a method of cooling and lubricating a metal-cutting rotating tool with a geometrically defined cutting element and/or the workpiece in the cutting zone. A coolant-lubricant and a carrier gas are fed separately into a tool shaft, brought together inside the rotating working spindle as close as possible to the cutting zone and directed via integral feed ducts onto the cutting element and/or cutting zone. Also disclosed is a device for applying this method. The coolant-lubricant and carrier gas are each introduced into a coolant reservoir completely or partially filled with a porous filler where they are mixed; the mixture is then fed directly into the cutting zone. Immediately behind the working spindle is a reservoir chamber (11) filled completely or partially with a porous filler (15) and comprising a substantially cylindrical closed casing (14) with a coaxial feed aperture (16) for the coolant-lubricant on one end face, radial feed apertures (17) in the casing (14) for the carrier gas and with an outlet aperture (18) smaller than the casing diameter for the coolant-lubricant-carrier gas mixture in the end face of the casing (14) opposite the feed aperture (16) for the coolant-lubricant.
Abstract:
The invention concerns a machine tool comprising a plurality of spindles which are disposed parallel to one another and preferably vertically for the transport of the workpieces or tools to and from the machining point and for the simultaneous or different, separate machining of a plurality of workpieces. The spindles, which can be driven about their axes of rotation and displaced in their axial direction, can be displaced on horizontal guide tracks together or relative to one another. According to the invention, all the spindles (10, 11) can be displaced such that they are supported independently of one another, in each case with a separate carriage (3, 4) on guide tracks (2) disposed at different levels and on one side on a securing plane. The carriages (3, 4) are imbricated in one another such that the outer carriage(s) (3) surrounds (surround) the inner carriage(s) (4) in frame-like manner.
Abstract:
The invention relates to a transfer line with devices for conveying work pieces along the central bases (1), lateral bases (5) set up along the sides of the central bases (1) on which the processing units (4) are mounted so as to be capable of displacement, and supply devices for the processing stations. In order to improve access to the transfer line and simplify component units, the following features are proposed: a) the supply devices along the direction of travel of the work pieces are arranged exclusively within or in the region of and/or above the central bases (1); b) the supply devices are connected to each processing station via short detachable connecting pieces; c) shut-off devices are provided at least in the main lines (32) for hydraulics, lubrication, pneumatics etc.; and d) at least one control block (10) with valves (9) is provided between the shut-off devices (31) and the processing station. Alternatively, it is proposed that a control panel (11) with a control block (10) should be provided in the immediate vicinity of the work piece conveyor line and should be connected via valve tubes (23) to a distributor block (8) and/or directly to the main lines (32) for hydraulics, lubricants, pneumatics or the like and to the consumer units of the processing station.