Abstract:
A manipulating device (1) for lathes is described, in particular for vertical turret lathes including at least one toolholder saddle, of the type comprising at least a first and a second workpiece manipulator device (10,11) associated with the saddle, such that by means of the displacement of the toolholder saddle the manipulator devices are displaceable between a station (C) for loading workpieces (P) to be machined and a station (S) for unloading the machined workpieces, a workpiece table (4) of the lathe being placed between the stations (C,S) to support the workpiece (P) during machining, wherein the first and the second manipulator device (10, 11) are displaceable with movements independent of one another, at least in the direction (X) of displacement of the toolholder saddle to and from the loading and unloading stations (C,S) and the workpiece table (4), in such a way that the distance between the manipulator devices (10, 11) on the lathe is adjustable at least in that direction (X).
Abstract:
A machine tool for machining operations, particularly turning operations, is described and comprises a piece-holding apparatus including at least one mandrel (9) for supporting the piece (P) to be machined, the mandrel being driven so as to rotate about its own axis (C), at least one tool-holder slide (2) guided movably relative to the mandrel (9) for the machining of the piece, and at least one manipulator device (10) provided on the slide (2), for moving the pieces to be machined from a loading station to the mandrel (9) and moving the machined pieces from the mandrel to an unloading station. The manipulator device comprises at least a pair of manipulator members (13, 14) provided on a common support (12) which is mounted on the tool-holder slide (2) so as to be rotatable about a first rotation axis (X1) arranged parallel to the rotation axis (C) of the mandrel.
Abstract:
Equipment for mechanical machining, especially the turning and drilling of mechanical workpieces (2), such as light alloy wheels and the like, comprising at least one turning unit (3) with a double chuck (6, 7) to support the workpieces being machined and a turning head (8) designed to work in association with one or other of the chucks (6, 7) alternately, at least one workpiece loading/unloading device (11) for moving the workpieces being machined on one or other of the chucks (6, 7) so as to bring about loading/unloading of the workpieces from one of the chucks at the same time as mechanical machining is being carried out on the other chuck. The equipment further comprises at least one drilling unit (4) operatively associated with the turning unit (3) and including at least one first drilling head (21) combined with at least one corresponding first workpiece-holding means (19) and at least one second device (23) for loading/unloading parts to move parts being machined in the drilling unit (4). The first and second loading/unloading devices (11, 23) are further incorporated into the equipment to move the parts being machined away from and towards one or other of the turning (3) and drilling (4) units so that mechanical machining in the drilling and turning unit takes place at the same time as the operations of loading and unloading workpieces onto and from the equipment.
Abstract:
A device for the locking of semifinished brake discs (3) subjected to mechanical machining is described, comprising a plurality of centring members (8) provided on a worktable (2) and movable in respective radial directions intersecting on the axis of rotation (X) of the table, wherein each of the centring members (8) of the plurality comprises a respective head (10) having at least a first part (10a) and a second part (10b) that are capable of contact, alternately with each other, with the semifinished disc (3) to be subjected to centring and locking, the first and second part being configured in such a way as to engage, respectively, the outer surface of a semifinished solid disc and at least part of the radial ventilation passages (7) of a semifinished ventilated disc, the head (10) being capable of being oriented with respect to the worktable such as to present selectively one or the other of the parts (10a, 10b) for contact with the corresponding type of semifinished brake disc (3).
Abstract:
A device for clamping mechanical pieces that are subjected to machining operations, particularly for clamping vehicle wheels (4), comprises means (8) for reversibly clamping the wheels (4) to a piece-holder table (2), the clamping means cooperating with and fitting in the holes (6) that are provided in the face portion of the wheel for the mounting of the wheel on a vehicle. The device further comprises means (9) for the localized support of the wheel (4) in an outer peripheral region (10) of the face portion (5), the support means (9) being lockable selectively in order to constitute a rigid prop for supporting the wheel (4) during the machining thereof.
Abstract:
A method of machining light-alloy metallic materials, in particular aluminium-alloy wheels, by turning, is described and it comprises the step of directing a flow of cooling fluid (F) into the interface region between a tool (3) and a workpiece (2) for localized cooling of the region, where the cooling fluid (F) is cooled air.
Abstract:
A method for mechanical machining, in particular for drilling and turning wheels (1) of light alloy, comprising a step (30) of centring and locking the wheel to be machined prior to the steps (40, 50) of drilling and turning the wheel. In the centring step (30) provision is made for the further steps of arranging a seating device for the wheel (1) comprising a plurality of elements having the form of a circular sector (4) in plan view, coplanar with each other and spaced apart from each other angularly, each of the sectors (4) being movable along a predefined radial direction (R), the directions (R) intersecting at a common central axis (Z) running perpendicularly to the radial directions, each of the sectors (4) having a respective seating surface (4a) for a corresponding part of the outer front portion (2) of the wheel (1) arranged in a position facing the sectors (4), and of moving the plurality of seating sectors (4) along the respective radial directions (R) to suit the outside diameter of the wheel undergoing the step of centring, so that the seating of wheels (1) having different diameters varying within a preselected range of values is obtained on the device. An installation operating according to the above-mentioned method is also described.
Abstract:
A method is described for centring semi-finished parts (2) which are to undergo mechanical machining, comprising the steps of preparing a centring device (1) comprising three centring elements (11) spaced apart angularly at a regular pitch, capable of coming into contact with the semi-finished part (2) to move it into a centred position, each of the centring elements (11) being movable along a preset radial direction (Y), the radial directions intersecting at the geometrical axis (X) of centring of the part. The method further makes provision for the steps of moving each centring element (11) along the corresponding radial direction (Y), with controlled and independent movement of each centring unit relative to the others, by means of a respective drive means (15) associated with respective means of transmitting the motion (16, 17) capable of converting the rotational motion of each drive means (15) into translational motion of the corresponding centring element (11), and of adjusting the position of each centring unit (11) as a function of the torque developed by the respective drive means (15), until a condition of centring is reached in which all the torque forces developed by the drive means of the corresponding centring elements are greater than or equal to a preset threshold value indicating that the desired centring position of the part (2) relative to the geometrical axis (X) of the centring device has been reached. A centring device operating according to the above-mentioned method is also described.
Abstract:
A method of machining mechanical workpieces, in particular of machining the braking surfaces (2,3) of a brake disc (1) for vehicles is described and comprises the steps of loading the workpiece onto a work station (8) and clamping the workpiece in a median reference plane (A) between the opposed braking surfaces (2,3), as well as defining the excess material material thicnness to be removed from each of the said surfaces, with respect to the positioning coordinates of the said plane in relation to a system of working axes of the station, to achieve a balanced, centred division of excess metal removed from the said surfaces (2,3). The method also comprises the steps of preliminarily loading and clamping the workpiece on a handling device (7) operatively controlled by the work station (8) for the machining of the workpiece, the workpiece being gripped on the handling device (7) in the region of the said madian place (A), of bringing the said device (7), towards a workpiece-holder chuck (10) of the work station (8) with subsequent measurement of the positioning co-ordinates of the said median plane (A) in relation to the system of working axes, and of clamping the workpiece on the chuck (10) of the work station and releasing the handling device (7) to allow both of the opposed workpiece surfaces (2,3) to be machined in the said work station (8) by removal of the preselected excess material thicknesses calculated in relation to the positioning co-ordinates of the said plane (A).
Abstract:
A method for processing products having low tolerances by removing shavings, including a processing step for finishing the workpiece being processed (2), comprises a step for detecting temperature (T) of the workpiece being processed (2) before or at the same time as the finishing step and a step for adjusting the finishing depths in accordance with the detected temperature value.