SU397270A1 - DEVICE FOR PROCESSING MULTI-DISTURBED - Google Patents

Description

one

The invention relates to metalworking and can be used on rizlichnyh machine tools, but mainly on multi-spindle automatic lathes.

A device for machining polyhedra is known, the cutting head of which, with the cutting tools according to the number of faces of the polyhedron, is kinematically connected with the machine spindle through the builder.

The proposed device differs from the known one in that the building mechanism is made in the form of a two-shaft coupling, the plugs of which are fixed at the ends of the middle roller of the coupling and are located in perpendicular planes. This improves the processing accuracy of the polyhedron with an uneven rotation of the cutting head.

With such a double-hinged coupling design, the cutting head will rotate unevenly with a uniform rotation of the drive shaft, which is expressed in the lag or advance of the cutters in the angle of rotation. The cutter lag in the machining zone or its accelerated output, in combination with the uniform rotation of the part, ensures that the cutting edge point of the tool relative to the part approaches the straight line with high accuracy.

FIG. 1 shows the proposed device; in fig. 2 is a section along A-A in FIG. one.

The apparatus for machining polyhedra includes a cutting head Y with cutters 2, a shaft 3 mounted in the housing 4, and a double-joint coupling. The latter consists of a driven shaft 5 with a fork 6 fixed on it, an intermediate shaft 7, at the ends of which the forks § n 9 of the middle shaft are fixed, and a driving shaft 10 with a fork //. The forks 8 and 9 of the middle shaft are located in perpendicular planes and are connected pivotally to 6 tl forks 1} with a crosspiece 12. The workpiece 13 is fixed in the spindle 14 of the machine, the support device for which the polyhedra are mounted on the slide. The spindle 14 is connected to the drive shaft 10 by a kinematic chain with a gear ratio i. The number of cutters Z is determined by the number of faces of the polyhedron and the gear ratio i. The angular positioning of the incisors relative to the fork 6 is chosen in such a way that the transition of the incisor from the lag to the advancing (or from the advancing to the lag) is in the middle of the machined face. The change in angle (see Fig. 1) during movement of the caliper with the head fixed on it is prevented by a splined telescopic connection of the shaft 3 with the shaft 5. Rotation from the pin 14 on the kinematic chain with the gear ratio i is transmitted to the drive shaft 10, which transmits a rotation through intermediate shaft 7, while the rotation of the intermediate shaft will be uneven. The uniformity of rotation of the shaft 7 is enhanced (increased) by a second hinge connecting the shaft 7 with the shaft 5 rotating the cutting head.

Object of the Invention A device for processing polyhedra, whose cutting head with cutting tools according to the number of faces of a polyhedron is kinematically connected with the machine tool through a mechanism for building, characterized in that, in order to improve the processing accuracy of a polyhedron with an uneven rotation of the cutting head, the building mechanism is designed as a double-hinge joint, the plugs of which are fixed at the ends of the middle roller of the coupling and arranged in perpendicular planes.

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