SU1175625A1 - Arrangement for machining holes - Google Patents

Abstract

I. DEVICE FOR MACHINING HOLES, containing a spindle rotation drive with a tool holder, their axial movement mechanism, including a copy screw with two copy nuts, and a tool holder displacement in the radial direction, distinguished by the fact that in order to increase the device performance and simplify it the design, the tool holder displacement mechanism in the radial direction is made in a bracket mounted on the spindle, carrying a finger parallel to the spindle axis, and mounted on the The lever can be rotated with a tool holder fixed in it, and the bracket is provided with an abutment and a stop screw for interacting alternately with the tool holder. ., 2. The device according to claim 1, that is, that the threads of different pitch for the nuts are made (L in one section of the coping screw, and the nuts are installed with the possibility of rotation and alternate interaction with the mentioned threads.

Description

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The invention relates to metal cutting and can be used to carry out drilling and threading operations in a single tool pass.

The purpose of the invention is to improve the performance of the device and simplify its design by reducing the time required for adjusting the axial feed of the tool and switching the mechanism for its displacement in the radial direction.

FIG. 1 shows a device for machining openings during a forward run} in FIG. 2 is a device for processing holes during the return stroke; in fig. 3 is a cross section of the tool in the cutting zone during the forward stroke; in fig. 4 is a cross section of the tool in the cutting zone during the return / stroke; in fig. 5 - tool construction.

The device for machining the hole comprises a spindle 1 installed in the housing 2 for rotation and axial movement. On the spindle 1 there is a bracket 3, bearing the finger 4, on which the lever 5 is rotatably mounted with the tool holder 6 fixed on it. The tool holder 6 has a cartridge 7 with the tool 8. On the bracket 3, the stop 9 is made and the stop screw 10 is placed. At the opposite end spindle 1 has a coping screw 1 I, on the surface of one thread of which another cut is made with a pitch that is not equal to the pitch of the main thread.

The copier screw 11 is equipped with a copier nut 12 and a copier nut 13, interacting with the corresponding threads of the copier screw 11. The copier nuts are mounted rotatably in the housing of the double-sided electromagnetic clutch 14 fixedly mounted.

The hole processing device operates in the following manner.

Pyindel 1 is reported to rotate V (with simultaneous axial movement, which is provided when the right winding of the electromagnetic clutch 14 is turned on and coupled with the nut 13. The thread pitch of the specified nut is equal to the feed per one turn of the spindle for the straight stroke - drilling (drilling). The movement from the spindle 1 is overeat through the lever 5 to the tool holder 6, which, under the action of the cutting force Fj, (FIG. 3) acting on the cutting tooth of the tool, is pressed against the stop 9 of the bracket 3. With this The m axis Oj of tool B coincides with the axis O, - spindle 1, and drilling or drilling of the hole (up to diameter dg), intended for threading, occurs (Fig. 3).

When the smooth cylindrical hole is machined to the desired depth, the spindle 1 communicates the reversal motion Vj, and the cutting force F (Fig. 4) acting on the thread-forming tooth of the tool 8 rotates the tool with the tool holder 7 and the lever 5 about the axis 4 (point O in Fig. 4) up to the stop with the limiting screw 10 at an angle (f. L is the distance between the finger 4 and the spindle 1. The angle (j / ensures that the axis O of the tool 7 relative to the axis 0 of the spindle 1 is displaced so that the tooth-forming tooth of the tool 8 penetrates into the surface in the radial direction to the height of the formed threaded profile, i.e., up to diameter d. This includes the left winding of the electromagnetic clutch 14, with which the cam nut 12 is engaged with a thread pitch equal to the thread pitch cut by the tool 8 in the hole being machined when reversing Ul spindle 1 ..

The diameter of the working part of the tool must be equal to the inner diameter of the threaded hole d, the value of L — the distance from the finger 4 to the spindle axis — is chosen from structural considerations. Depending on these parameters and the parameters of the threaded hole, an angle is chosen (f,

Claims (2)

1. DEVICE FOR HANDLING HOLES, comprising a spindle rotation drive with a tool holder, an axial movement mechanism thereof, including a copy screw with two copy nuts, and a tool holder displacement mechanism in the radial direction, characterized in that, in order to increase the productivity of the device and to simplify its design, the tool holder displacement mechanism in the radial direction is made in a wye (a bracket mounted on a spindle with a support bearing a finger parallel to the axis of the spindle and mounted on a face with the possibility of turning the lever with the tool holder fixed in it, and the bracket is equipped with a stop and a limit screw for alternating interaction with the tool holder. ''. _h 2. The device according to π. 1, the fact that the threads of different pitch for the nuts are made on one section of the copy screw, and the nuts are mounted with the possibility of rotation and alternate interaction with these threads. 1 1175625 2