SU1636183A1 - Device for spindle stop in specified angular position - Google Patents

Abstract

The invention relates to a machine tool industry and can be used in machine tools. The purpose of the invention is to increase productivity by reducing the auxiliary time. Gear 3 is rigidly fixed on spindle 2 and meshes with gear 4. mounted on the main drive shaft 6

Description

The invention relates to a machine tool industry and can be used in machine tools to stop a spindle in a predetermined position.

The aim of the invention is to increase labor productivity by reducing the auxiliary time.

Fig. 1 is a schematic diagram of a device with a rotating spindle; Figure 2 is the same in the release mode; FIG. 3 is a development of a screw groove of a control cam.

The housing 1 has a spindle 2 with a gear 3 fixed on it, coupled with the gear 4, which is made integral with the coupling half 5 of the cam clutch, which is installed with the possibility of independent rotation relative to the shaft 6 of the main movement drive 7. The other coupling half 8 of the cam coupling is fixed on the shaft 6 by twisting with a key and spring loaded to the coupling half 5 by a spring 9. The double-arm lever 10 is rotatably mounted on an axis 11 fixed in the housing 1 so that the shoulders 12 and 13 of the lever are placed in grooves made respectively the coupling half 8 and the cam 14, on the surface of which is also cut a helical groove 15, with which it is possible to contact the end of the rod 16 of the corner-stop (power cylinder 17) spindle 2, made in the form of the power cylinder. In addition, on the spindle 2 has a brake mechanism 18 relative to the wall of the housing 1.

The device works as follows.

Upon completion of the part processing cycle, a command is issued to extend the stem 16 of the power cylinder. The end of the stem 16 moves to the surface of the cam 14 rotating with the spindle 2 and, as soon as the screw groove 15 is aligned with the end of the power cylinder rod 16, the stem end interacts with the profile groove 15 of the cam 14. As a result, the cam groove runs on

the rod 16 and the movement of the cam 14 along the key along the spindle 2 to the right (according to the drawing). The shoulder 12 of the two shoulders lever 10. having constant contact with the groove in the cam 14, is turned to the right, and the shoulder 13 to the left.

In this case, the coupling half 8 also moves to the left (according to the drawing) and leaves the engagement with the coupling half 5. while compressing the spring 9,

Since the half coupling 5 can rotate

regardless of the main drive shaft 6, the shaft 6 continues to rotate at operating speed, and the coupling half 5 rotates with gear 3 fixed on the spindle 2, which rotates along

inertia. Together with the spindle 2, the cam 14 rotates. It continues to move along the spindle 2 along the key. After the cam 14 has been moved for a distance sufficient to release the coupling halves, the end of the cam 14 begins to interact with the brake 18. As a result, the frequency of the inertial rotation of the spindle decreases. At the moment of contact of the end of the rod 16 with the end section of the screw groove 15 of the cam 14, the spindle 2 completely stops at a strictly defined angular position, which is determined by the profile of the screw groove 15 with the end section perpendicular to the spindle axis.

After the part is installed in the clamping fixture mounted on the spindle 2 of the machine, the command to move the rod 16 forward is removed to start the next machining cycle, and the rod moves backward under the action of the spring of the power cylinder, the output from the profile groove 15 of the cam 14 is then axially movable and continuing to rotate with the shaft 6 at the operating speed of the coupling half 8, not held by the lever 10, under the action of the spring 9 moves along the key to the right, the engagement with the non-rotating coupling half 5 transfers The rotation from the drive 7 is the main movement, and through gears 4 and 3 - by the spindle 2. In the process of moving the coupling half 8, before being fully engaged with the coupling half 5, the cam 14 is retracted from the brake 18 using the pivoting lever 10. The engaged position of the coupling half 5 and 8 corresponds to the initial position of the cam 14. The machining of the part by cutting begins.

Claims (1)

Apparatus of the Invention A device for stopping the spindle in a certain angular position, comprising a housing, a gear transmission intended for kinematically coupling the spindle with the main drive drive shaft, the clutch with spring-loaded 0 five 0 a half coupling, a half control coupling cam, and a double-arm lever connected to the half coupling and a control cam, characterized in that, in order to increase productivity by reducing the auxiliary time, the device is equipped with a brake mechanism mounted on the housing coaxially with the spindle and the load cylinder, whose rod It is connected with the control cam of the half coupling mounted on the spindle with the possibility of axial movement and interaction with its end face with the brake mechanism. an additional screw groove is made on the control cam, the end section of which is perpendicular to the longitudinal axis of the spindle, the clutch is located on the main drive shaft and one of its coupling halves is rigidly connected to the gear gear that can be freely rotated relative to the main drive shaft movement, and the double-shouldered lever attached to the body. 5 4 Phie.1 / 15 Axis of rotation of spindle Fi. H.