FR2602703A1 - Numerically controlled front-operated lathe with a moving spindle-carrying headstock providing the displacements in the direction perpendicular to the axis of the spindle - Google Patents

Abstract

Device for simplifying construction of numerically controlled front-operated lathes. The invention relates to a device making the spindle-carrying headstocks movable to provide the displacements in the direction of the X axis and to allow this moving headstock to offer up the workpieces in front of the operator or the loading and unloading stations, and to eliminate the use of cross slides, as well as to allow a single tool-carrying saddle on the Z axis to serve two moving headstocks on the same X axis for machining identical pieces. It consists of a tool-carrying saddle 3 on the Z axis, serving two moving headstocks 1 and 1 bis in a working position on one and the same X axis. These same headstocks at 9 and 9 bis for taking up pieces and at 8 and 8 bis, their position for unloading the pieces, the arrows showing the possible itinerary of the pieces.

Description

 Numerically controlled front turn with movable spindle head doll ensuring movement in the direction perpendicular to the spindle axis.

 The present invention relates to a device which eliminates the use of the cross carriage on numerically controlled front towers and simplifies the automatic loading of this type of tower.

 The current numerical control front towers consist of a frame on which are firmly anchored one or two spindle dolls depending on the type of tower, and in front of each of which is placed on a slide a crossed carriage which ensures movement on all axes and "Z", these crossed carriages, in front of the headstock or dolls, do not allow easy manual loading of the workpieces and makes automatic loading complex.

 The device according to the invention overcomes these drawbacks, it eliminates the use of the crossed carriage. For a frontal rotation with a spindle, the spindle holder spindle is machined in such a way as to ensure a precise sliding, and adequate clamping for a sufficiently long slide, it is placed on this slide, the axis of the slide being perpendicular to the axis of the spindle allows the spindle holder doll to move in the direction of the ase XX via a ball screw controlled by a motor corresponding to the use for numerical control as for the carriage carriage tools, 16 spindle drive motor can be spun on the headstock; at one end of the headstock slide and placed on another slide fixed to the frame, the tool carriage which moves perpendicular to the headstock slide along the "Z" axis. At the other end of the headstock slide is the manual (or automatic) loading station in front of which the moving headstock comes to pick up or drop off the parts concerned by the lunuaage.

 This device according to the invention makes it possible with a single carriage equipped on each side with a pre-adjusted tool holder with common rotation, this carriage moving on the axis #Z ", to serve two movable dolls evolving on a same axis" r ' , one to the right and the other to the left of the carriage "Z" in order to machine two identical parts.

 The accompanying drawings illustrate the invention (for good understanding, the protective casings and the accessories are not shown).

 FIG. 1 represents the device according to the invention, in partial section the movable headstock (1) on a possible form of slide (2) ensuring the displacements according to the direction of the axis "X" and the trolley carrying tools (3) ensuring the displacements along the axis t'Z "on another slide (4) the whole fixed on a frame (5) the spindle control motor (6) fixed on the headstock.

 FIG. 2 shows the device according to the invention in top view, the "Z" axis tool carriage (3) on the slide (4) the t-axis movable headstock, 5X (1) on the slide (2) in the working position and this in its position for manual loading and unloading (6) all placed on the frame (5).

 FIG. 3 represents the device according to the invention in top view, with symmetrical lathes with a single movable headstock, # 'a deQ lathes intended for the machining of the first face of a part, the second lathe for the opposite face of this part, in (1) and (ibis) the mobile dolls in the working position in front of the tool carts (3) and (3bis), in (8) and (8bis) the mobile dolls in the part removal position, in (9) and (9bis) the axes of position of the dolls movable for gripping the workpiece, between (8) and (9bis) a device for turning the workpieces (10) to present the second face to be machined on the second lathe, the arrows showing the possible parts route for this type of installation with automatic parts loading.

 FIG. 4 represents the device according to the invention, seen from above, which allows with a single carriage (3) on the "Z" axis to serve two movable dolls (1) and (ibis) in the working position, on a same axis "r ', in (9) and (9bis) the position of the mobile dolls for picking up the parts, in (8) and (8bis) the position of these dolls when removing the part, the arrows showing the possible route of parts, possibly going to a second lathe in order to machine the second face of a part.

 The device according to the invention is particularly intended for the construction of numerical control front towers.

Claims (5)

p E V r N D I C A T I O N S  1) Numerically controlled front tower characterized in that, on a built mee, the spindle holder doll is machined in such a way that it ensures a precise sliding, without play by an adequate clamping for a slide long enough so that the movable doll can be at one end, in the part machining position, and at the other end, in the part loading or depositing position, the movements of the headstock can be transmitted by means of a ball screw controlled by a motor corresponding to the use for numerical control, as for the tool carriage which is placed on a slide fixed to one end of the frame and perpendicular to the axis of the slide of the spindle holder doll, this tool carriage ensures the displacements parallel and in the extension of the axis of the spindle, the movable headstock ensuring the displacements perpendicular to the axis of the spindle; the motor group for controlling the spindle rotation, which can be fixed on the pipe or attached to the frame, on a mobile console which accompanies the headstock in these displacements, this console being placed on a slide, the movement of this console being transmitted by a ball screw that can be controlled by the same motor as that of the headstock displacement control.  2) Device according to claim 1 characterized in that. using a movable headstock for displacements perpendicular to the axis of the spindle, and a tool trolley for parallel displacements and in the extension of the spindle axis, eliminates the usual use of the crossed carriage.  3) Device according to claim 1 characterized in that the latter, in the case of a lathe with two spindle carrier dolls evolving on the same axis perpendicular to the axis of the spindle, can use only one carriage tool holder, this trolley being equipped on each of its sides with a pre-adjusted tool holder with common position selection, the dolls being located, on the same frame, one to the right, the other to the left of this trolley toolholders.  4) Device according to claim 3 characterized in that a lathe, with two movable dolls, equipped with two carriages with a single tool holder, each of these carriages being placed on a slide perpendicular to the axis of the slide of the spindle holder dolls , can perform different machining on each headstock, the two movements of the tool carriages being made independent.  5) Device according to claim 1 characterized in that the doll or dolls, due to their mobility on a slide perpendicular to the axis of the spindle, can appear, after the machining phases, in front of their loading station or removal (automatic or single) of the parts concerned by the machining.