Abstract

The invention relates to a machine tool (1) and to a method for finely machining bearing bores (6) of a bearing line (5) on at least one workpiece (4), wherein a workpiece (4) held by a workpiece holder (2) and at least one chip-forming tool (7) are positioned in relation to each other and, in this process, the tool (7) moves into the workpiece (4), and in a further step a plurality of bearing bores (6) is simultaneously finely machined by relative motion between at least said tool (7) and the workpiece (4) in the longitudinal direction (9) of the bearing line (5). In order to reproducibly achieve high fine-machining quality together with short cycle times, according to the invention, in the positioning process, a plurality of angle heads (10), which are fixed in the position thereof in relation to each other and in the angle thereof and which each have a chip-forming tool (7), moves into the workpiece (4) at an angle to the longitudinal direction (9) of the bearing line (5), which tools (7) simultaneously finely machine a plurality of bearing bores (6) in cantilevered support by the relative motion between said tools and the workpiece (4) in the longitudinal direction (9) of the bearing line (5) in a further step.

IPC Classes  ?

• B23B 39/18 - Setting work or tool carrier along a straight index line
• B23B 41/12 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts
• B23Q 39/02 - Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station

Abstract

Disclosed is a transfer centre for machining at least one workpiece (5), comprising: a machine frame (2); a plurality of preferably stationary machining spindles (28) arranged in the machine frame (2), particularly in a machining head (27); a workpiece carrier (4) on which at least one workpiece (5) to be machined is arranged by means of a respective clamping device (6); and a workpiece manipulator (3) arranged in the machine frame (2), onto which workpiece manipulator the workpiece carrier (4) is flange-mounted and which is movable by means of drive means in at least one spatial direction in relation to the machine frame (2). According to the invention, in order to achieve a high level of machining precision during parallel machining, the transfer centre (33) has a position compensation system (1), in order to compensate for a deviation between the actual and the target position of the workpiece (5) or workpieces (5), comprising at least two pressure elements (16) arranged between the workpiece (5) or workpieces (5) and the machine frame (2), the directions of action (32) of said pressure elements forming an angle relative to one another.

IPC Classes  ?

• B23Q 1/26 - Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable membersMeans for preventing relative movement of such members
• B23Q 11/00 - Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling workSafety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
• B23Q 23/00 - Arrangements for compensating for irregularities or wear, e.g. of ways, of setting mechanisms
• B23Q 39/02 - Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
• G05B 19/404 - Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia

Abstract

The invention relates to a machine tool (1) having a multiplicity of stationary tool spindles (3) that are optionally displaceable from a retracted rest position into an extended working position and are positioned at various positions in a frame-like stand (2) which defines and comprises a machining space, and having a workpiece manipulator (4) by way of which a workpiece support (5) is movable multi-axially in translation and preferably also in rotation. In order to create advantageous loading conditions, it is proposed that a loading door (8) is associated with at least one of the leg walls (7) defining the machining space (6), and that a workpiece support holder (10), which is equipped with a coupling (11) for the workpiece support (5), is arranged on at least one, preferably on both, loading door leaf fronts (9).

IPC Classes  ?

• B23Q 1/66 - Work-tables interchangeably movable into operating positions
• B23Q 7/04 - Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of grippers
• B23Q 11/08 - Protective coverings for parts of machine toolsSplash guards

Goods & Services

Machines for metalworking, machine tools, milling machines, thread cutting machines, metalworking machines and transfer machines and parts thereof, included in this class; tools for machine tools. Treatment of materials. Scientific and technological services concerning the operation and functioning of machines and machine tools, in particular for the process optimisation of transfer machines; development and maintenance of computer software for the operation and functioning of machines and machine tools.

Goods & Services

[ Scientific and technological services concerning the operation and functioning of machines and machine tools, in particular for the process optimisation of transfer machines; development and maintenance of computer software for the operation and functioning of machines and machine tools ] Metalworking machines [ and metalworking machine tools, ] namely, for milling, drilling threading and cutting; metalworking machines, namely, transfer machines and replacement parts thereof [ ; tools for machine tools, namely, electrical drills, rolling and tubing mills, milling cutters, and electric plasma thread cutters, power-operated metalworking machine tools, namely, boring tools, core drilling bits, power tools, namely, reamers, power operated metalworking machine tools, namely, fine and stepped gun boring tools, circular milling tools, namely, circular saws, and power-operated milling tools, namely, face milling heads, threaded milling cutters, taps, cold-formed taps, combination tools, namely, combination power-operated saw and drill, machine tool and tap holders ]

Abstract

The invention relates to a method for activating a workpiece manipulator (4) of a machine tool (1) with a control device, which prescribes by means of a computing unit machining paths (6) for a workpiece that are to be travelled by the workpiece manipulator (4) from a machine starting position (A), wherein the workpiece (5), which can be moved by the workpiece manipulator (4) in a multi-axially translatory and preferably also rotating manner, is passsed to a plurality of tools (3) one after the other for the step-by-step machining.  In order to create advantageous conditions, it is proposed that, in the case of an interruption in machining, the workpiece manipulator (4) is made to move with the workpiece (5) back over the path of movement (7) assigned to the respective machining step into the starting position (8) prior to this machining step, after which the workpiece manipulator is optionally stopped or moved into the machine starting position (A).

IPC Classes  ?

• B23Q 7/04 - Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of grippers
• G05B 19/4067 - Restoring data or position after power failure or other interruption

Abstract

The invention relates to a machine tool (1) having a multiplicity of fixed tool spindles (3) which can optionally be moved from a retracted position of rest to an extended operating position and are positioned at various points in a frame-like mount (2), and having a workpiece carrier (4) with at least one workpiece receiving means (5), wherein the workpiece carrier (4) is moveable at least in a plurality of axes in a translatory manner, and preferably also in a rotational manner. In order to provide advantageous design conditions, it is proposed that at least one of the tool spindles (3) is assigned a tool magazine (7) together with a tool changer (8).

IPC Classes  ?

• B23Q 3/157 - Arrangements for automatic insertion or removal of tools of rotary tools
• B23Q 39/02 - Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station