DE1602900A1 - Controllable tool carrier for lathes - Google Patents

Description

Description for the patent application: Controllable tool carrier for Lathes. There are controls for longitudinal and cross slides of lathes known that the movement of a point P P is at the same time Po to F? in. picture 1 on Sheet 1, look for point, the curve F) of the lathe chisel main chord f along a any curve P in a plane E, which the axis of rotation A and considered Waves f the lathe chisel.

Main cutting edge H contains, allow with feed and feed speed ..

The state of development of such controls is now sufficiently characterized by the working method zeBo of numerical path controls of lathes. The angle of incidence of the turning tool axis D was axis of rotation A in plane E is constant during the machining process in such path controls. This has to the rim that it is to the procedure and a. From a technological point of view, perfect machining is no longer possible.

Figure 1 on sheet 1 clearly shows how, with a constant angle ae and an increasing pitch angle, the contact length B increases from size BO at point Po to size B1 is.

According to the knowledge of machining research, the important technological parameters change with increasing length of engagement B with constant current cutting speed v and constant current feed speed s: cutting force, tool life, manufacturing accuracy, surface quality and the type of chip formation. Therefore, for technological and economic reasons, the aim is to keep constant the ..3 cutting parameters optimally set for a specific machining process, such as cutting depth s and thus the length of engagement B, cutting speed v and feed s'. With the exception of mechanically controlled turning devices, no path controls or other devices of lathes are known so far that a change in the setting angle X and thus a change in the setting direction of the turning chisel main cutting edge H as a function of the tangent angle mK in a point P of any curve F during cause or allow the machining process. The invention described below enables the angle of attack to be increased either as a function of the tangent angle oC or as a function of any other argument during the machining process and thus represents a significant advance in the technology of external turning As for turned parts with convex or concave fittings, the cutting depth a can be kept constant during an uninterrupted cut, even during the transition from one form element to another without changing tools; whereby a considerable reduction in the processing time and an improvement in the manufacturing quality can be achieved. A specially shaped turning tool l (Figure 3 on sheet 2) with hard-metal cutters 2 is connected by a clamping connection (screw 4) is fixed to the rotatable .Verkzeugträger 3 of the cross slide 6 "ornamental üierkzeugträger 3 is rotatable about n times 360 degrees about the axis Z (Fig. 2 on sheet 1. The drive for the rotation of the tool carrier 3 around the axis Z takes place, for example, via the worm drive with worm gear 9 and worm 8; the latter is driven by the electrically controlled stepper motor 13. The drive for the rotation of the tool carrier 3 around the Axis Z can also take place in another way, e.g. via a hydraulically operated rack, analogue s, and pinion, analogue 9. Figure ¢ on sheet 3 shows another simple control type using guide rulers 1 izrid _ 'and sliding block 3, which is entered in tuten U or V (3ild '> auf @ 31 @ tt 2) des Zaj) fens 4- (an': derkzeugtrl *, ger). The axis Z is perpendicular to the plane E, which the rotary axis A ( Fig. 1 on sheet 1) and the acc lone point P of curve F and main cutting edge H of the turning tool M and which is that meridional section plane of the turning part in which the radio P moves.

The piercing point Z 'of the Z axis through the plane E coincides with P so that the tip of the main cutting edge H lies on the Z axis. Has the tip of the main cutting edge H The components s bush 5, sliding ring 7, feather key 10, groove nut 11 and clamping screw 12 are additional and are only used for the technically correct implementation and securing of the rotary movement of the tool carrier 3 mm along the Z axis.

With the help of an electrical or mechanical control of the drive motor 13, the chisel axis G of the turning chisel S (, Fig. 2 on sheet 1) can be operated with any E-creation of grooves or for the separate processing of flat surfaces or conical surfaces (as with P6 and P? In Fig. 1 on sheet 1). The machining of a concave contour (at points P3 and P5 in picture 1 on sheet 1) as well as a convex contour piece (at point P4 in picture 1 on sheet 1) with a uniform cutting depth a and a uniform length of engagement Bo of the turning chisel main cutting edge H is possible through dit Invention guaranteed.

Claims (4)

Patent claims: around an axis Z perpendicular to the plane Es can be rotated n times 360 degrees and special turning tools such as. Lathe chisel (1), so that its cutting tip 1 'lies on the Z axis. The level B contains. the axis of rotation A and the point. 2 - the cutting point®: This is the plane in which the movement of point P runs. The rotation of the tool carrier (3,) about the axis Z. is carried out by a mechanical, hydraulic or electrical drive. 3; Claim according to 1 and 2, characterized in that the tool carrier (3) is displaced continuously or in steps along the Z axis. can be. '4. Claim gemiss 1, 2 and 3, characterized in that the tool-receiving part of the tool carrier (3) is formed so that a special rotation tool (1) .verschoben in this receiving part along the axis Z chew been andt clamped frs different positions . Claim according to 1, 2, 3 and 4, characterized in that the tool carrier (3) which can be rotated about the Z axis is connected to a tool holder which is also rotatable about the Z axis and can be swiveled quickly into discrete angular positions.