Abstract:
Die Erfindung betrifft eine numerisch gesteuerte Werkzeugmaschine mit einem Maschinenbett 1, einer Kabine mit einer Kabinenwand, die das Maschinenbett 1 zumindest teilweise umschließt, und zumindest einem Formelement 2, das eine im Wesentlichen plattenformige Grundform aufweist und mit der Werkzeugmaschine derart befestigt ist, dass zwischen dem Formelement 2 und der Kabinenwand und/oder dem Maschinenbett 1 ein Hohlraum 3 vorhanden ist.
Abstract:
A precision apparatus has a movable member (A), moving in a bridge element (2) arranged perpendicular to the movement of the moveable element. The bridge element comprising an air slit (S) and a exhaust (E). The bridge element (2) comprises a primary air duct (21), substantially extending along the length of the bridge element, which primary air duct is provided with apertures (21a, 21b), The apertures (21a, 21b) are evenly distributed along the length of the bridge element, and form an air flow passage to a secondary air duct (22), also substantially extending along the length of the bridge element. Through the secondary air duct in operation air is drawn through the air slit (S).
Abstract:
A method for maintaining a desired repetition accuracy in an industrial robot system comprising at least one manipulator with control equipment wherein the manipulator includes at least one mechanical structural part (1) comprising a drive unit (8), which during operation generates an amount of loss energy (W) which varies with time and which, after a time (Δt), causes a temperature change (ΔT) and a corresponding thermal deformation (Δu) of the structural part and hence a displacement (ΔP1) of the working point (P) of the system.
Abstract:
A spindle (5) rotates within a housing (H) on at least two antifriction bearings (B,E) which have raceways (10, 16) that are inclined to the axis (X) of the bearing and are otherwise configured to transfer thrust loading as well as radial loading. The bearings are mounted in opposition. One of the bearings has a race (4) which fits into an actuator sleeve (68) with an interference fit, and the actuator sleeve, in turn, is fitted into the housing, it having end regions (88) that are located beyond the ends of the bearing. Here the sleeve is fitted to the housing with an interference fit and is further sealed to the housing. The actuator sleeve also has an intervening region (90) between its two end regions, and here the actuator sleeve is located around the race. On its opposite face the actuator sleeve forms a chamber with the housing. When the chamber is pressurized, the intervening region of the sleeve flexes inwardly and contracts the race, thus altering the setting of the two bearings. Yet the end regions of the sleeve remain against the housing and the axis of rotation remains rigid. A control system monitors conditions, such as temperature, within the housing, and varies the pressure in the chamber behind the actuator sleeve, so that the setting in the bearings best accommodates the conditions under which the spindle operates.
Abstract:
A moving portal (1) for a measuring machine or a machine tool is described, comprising at least one pair of uprights (3a, 3b) supporting on their upper part at least one ledger (5) equipped with at least one measuring feeler arm or vertical tool-holder arm (7), each upright (3a, 3b) comprising on its lower part at least one respective base (11a, lib) equipped with supports sliding along a pair of guiding rails (15a, 15b), further comprising a system for compensating alignment errors of the guiding rails (15a, 15b) comprising at least one sliding support (16) arranged between at least the upright (3a) and the respective base (lla), such sliding support (16) having at least one degree of freedom with direction parallel to an axis (Y) perpendicular to a sliding direction of the portal (1) along the guiding rails (15a, 15b).
Abstract:
A machine tool assembly is shown having a machine base, a movable slide configured to move along a first axis of movement relative to the machine base, and an active unit attached to the movable slide. A linear guide is attached to the movable slide and the machine base that guides motion of the movable slide along the first axis of movement. A linear actuator device is attached to the movable slide and the machine base to provide computer controlled movement of the movable slide relative to the machine base along the first axis of movement. An expansion mounting secures at least one side of the movable slide to the machine base, the expansion mounting providing for movement of the movable slide along the first axis of movement and expansion and contraction of the movable slide along an axis perpendicular to the first axis of movement.
Abstract:
A process is described, to be adopted in the field of operating machines as regards their thermal control. Such process is based on the use of a system for storing thermal energy with phase-change materials. Preferred embodiments of such storage system consist, for example, in a panel (8) and a cylinder liner (13), composed of two metal skins (16) that enclose a core with cellular structure containing at least one type of phase-change material. The presence of phase-change materials ensures a high thermal capacity to the system for storing thermal energy. The process consists in applying at least one of the above systems for storing thermal energy as structural thermo- settling element of an operating machine, as thermal interface barrier or as system for increasing the thermal inertia of a component of the operating machine. In such a way, temperature variations (due to heat generated by some components inside the machine, or coming from the outside environment), and the consequent thermal distortions that are the cause of working or measuring errors, are limited. This guarantees the passive thermal control of the operating machine.
Abstract:
In a multi-axis machine tool comprising a first slide way (2a) and a second slide way (2b) set apart one from the other and extending parallel along a longitudinal axis (X), a machining station (3) delimited laterally by the slide ways (2a, 2b) , a cross member (4) presenting opposite ends (4a, 4b) each coupled to a respective slide way (2a, 2b), and a machining head (5) mounted to the cross member (4) and positionable over the machining station (3), at least the cross member (4) is fashioned from a low thermal expansion material.
Abstract:
Eine Trägeranordnung (1) für ein Maschinenportal umfasst einen Leichtbauträger (2) sowie Sekundärteilbasissegmente (4) und wenigstens eine Führungsschiene (10) eines Linearantriebe s. Sowohl die Sekundärteilbasissegmente (4) als auch die Führungsschiene (10) zeigen ein anderes Wärmeausdehnungsverhalt en als der Leichtbauträger (2). Die Sekundärteilbasissegmente (4) sind mit Abstand von ihren Rändern mittels wenigstens einer Befestigungsschraube (15) an zumindest einem in den Leichtbauträger (2) eingreifenden Befestigungskörper (16) befestigt. Sie weisen wenigstens eine Abstufung (9) auf, an der sie zumindest eine Führungsschiene (10) an deren Längsseite formschlüssig lagern. Die Führungsschiene (10) ist mittels wenigstens einer Dehnschraube (12) an dem Leichtbauträger (2) befestigt. Im Laufe eines Verfahrens zur Herstellung einer Trägeranordnung (1) der vorstehenden Art werden erst nach dem Aufkleben der Sekundärteilbasissegmente (4) auf den Leichtbauträger (2) die für die Befestigungsschrauben (15) der Sekundärteilbasissegmente (4) vorzusehenden Durchtrittsbohrungen (20) an den Sekundärteilbasissegmenten (4) und Gewindebohrungen (17) an den Befestigungskörpern (16) erstellt. Auch die Abstufungen (9) zur Lagerung der Führungsschiene (10) werden an den auf den Leichtbauträger (2) bereits aufgeklebten Sekundärteilbasissegmenten (4) gefertigt.
Abstract:
Eine Werkzeugmaschine ist mit zwei jeweils in einem eigenen Spindelgehäuse (16, 17) drehbar gelagerten Werkzeugspindeln ausgerüstet, die jeweils eine Werkzeugaufnahme für ein Werkzeug aufweisen. Ferner ist ein Werkstücktisch zur Aufnahme von zwei Vorrichtungen (27, 28) zum Einspannen von mit den Werkzeugen zu bearbeitenden Werkstücken und eine relativ zu dem Werkstücktisch in drei Achsen verfahrbare Tragstruktur (12) vorhanden, an der die beiden Spindelgehäuse (16, 17) mit einem in Richtung einer ersten der drei Achsen gesehenen Abstand zueinander montiert sind. Über eine Stellvorrichtung (37) ist die Lage der beiden Spindelgehäuse (17) zueinander veränderbar. Die Stellvorrichtung umfasst zumindest eine Rippe (38, 39) und eine Thermovorrichtung (47), über die die Temperatur der Rippe (38, 39) und somit deren Länge (L1, L2) veränderbar ist.