SU1445874A2 - Method of machining threaded parts with thrust shoulders or thrust end faces - Google Patents

Abstract

The invention relates to mechanical engineering technology, namely to the machining of parts having, on the one hand, a short external or internal thread, and on the other hand, a cylindrical surface coaxially with the thread. The purpose of the invention is to improve the accuracy of the relative position of the surfaces to be processed and to increase the productivity due to the simultaneous processing of several surfaces during one installation of the part. The thread is cut with a comb-shaped thread cutter at one end of the part by rotating the part and cutter, their mutual transverse movement in the opposite direction to each other, and longitudinal movement of one relative to the other by one turn of the part and simultaneously processing cylindrical surfaces coaxially with the thread at the other end details of another cutting tool. At the same time, the cutting tool is given rotation around the axis of the part, the feed movement along the axis of the part, and the boring head in which the tool is fixed, and the parts report additional movement in one direction and opposite to the direction of movement of the comb milling cutter, and the magnitude of the longitudinal feed of the boring head is synchronized with moving parts for a full cycle of processing. 2 Il. with e (L

Description

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The invention relates to mechanical engineering technology, namely to the machining of parts having, on the one hand, a short external or internal thread, and on the other hand, a cylindrical surface treated with a thread, and is an improvement of the known method according to the author. St. No. 1039658.

The purpose of the invention is to improve the accuracy of the relative position of the surfaces to be machined and to increase the productivity due to the simultaneous processing of several surfaces in one set of parts.

FIG. Figure 1 shows a processing scheme for a cylindrical surface located at one end of a part, simultaneously with threading, guiding cylindrical surfaces with machining of a thrust end located at the other end of the part; in fig. 2 is a view A of FIG. one.

The workpiece 1 is secured in the headstock spindle of a product of a thread milling machine (not shown). A threaded comb milling cutter 2 provided with cylindrical milling cutters 3 and 4 is secured in the spindle of the tool headstock (not shown). The tool 5 for machining the end surface: it is fixed in the spindle of the additional head 6 mounted on the machine bed (not shown). A tool 7 for machining a cylindrical surface at the other end of the part is installed in a cutter holder 8, mounted in the spindle of the boring head 9, which is mounted on a movable base (not shown) on a common workhead with the headstock. After fixing, the part 1 is given a slow rotational movement (circular feed), and in order to obtain a helix, a longitudinal shift, an amount of thread pitch per revolution of the part. A comb cutter 2 together with cutters 3 and 4, tool 5 is given a fast rotational movement (main movement), brought to its initial position and plunging to the full depth of milling into the corresponding surfaces of the part 1. Tool 7 is also given a fast rotational movement and approach t to its initial position for machining a cylindrical surface on the part 1 and give it a feed movement along the axis of the part 1, the boring head 9 is informed of the transverse movement in the same direction in which the machining Tyva part 1 and synchronized with its movement. After reaching a predetermined depth, the cutting motion of the cutters 2 together with the cutters 3 and 4 and the tool 5 is stopped, and in one revolution of the part 1, cylindrical, threaded and face surfaces at one end of the part are simultaneously milled and cylindrical surfaces at the other end are machined.

At the end of one turn of the part 1, the threads of the thread close and form a continuous helix over the entire machined surface. Close the cylindrical surface and the end surface adjacent to the thread.

The entire processing cycle is carried out for 1.26-1.31 turns of part 1. An additional rotation of 0.26-0.31 in excess of one full turn of part 1 is attached to supply cutter 2 together with cutters 3 and 4 and tool 5, cutting them and tap.

The tool 7 processes the cylindrical surface B at the second end of part 1 for the same 1.26-1.31 part 1 turns, for which surfaces C, D, E, E are processed at the first end of the part.

Claims (1)

Invention Formula The method of machining threaded parts With stub ledges or stub end on the author. St. No. 1039658, characterized in that, in order to increase productivity and accuracy of the relative position of the surfaces to be machined, a boring head is used, which is placed coaxially with the workpiece on the opposite side of the comb milling cutter and is informed by rotation about the axis of the workpiece, longitudinal feed along this axis, wherein the parts and the boring head are informed by an additional synchronous lateral movement in one direction opposite to the direction of movement of the comb milling cutter, and Dolny feed boring head is synchronized with the movement of the longitudinal parts. 6 7 tshtt 1 Type A Ml