SU1484466A1 - Vibrating head - Google Patents

Abstract

The invention relates to the field of metal cutting and can be used mainly on multi-spindle machines. The aim of the invention is the expansion of technological capabilities by obtaining torsional vibrations of an arbitrary shape with a non-rotating spindle. When the engine is turned on, the disk 9 is rotated with the fingers 11 radially located on its periphery. On the fingers 11, the rollers 10 are mounted for rotation. When the disk 9 rotates, the rollers 10 alternately enter grooves 6 and 7 of the U-shaped leash 5 mounted on the spindle 2. The spindle 2 receives torsional vibrations, the shape of which depends on the shape of the grooves 6 and 7 of the leash 5. 2 Cp f-ly, 9 ill.

Description

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The invention relates to the field of metal cutting and can be used on multi-spindle machines.

The purpose of the invention is the expansion of technological capabilities by obtaining torsional vibrations of arbitrary shape with a non-rotating spindle.

FIG. 1 shows a vibrating head carrying a drill, a general view; in fig. 2 - vibrating head carrying a shaped cutter, general view; in fig. 3 is a section A-A in FIG. 1, in FIG. 4 is a view B in FIG. 3; in fig. 5 is a sectional view BB in FIG. four; in fig. 6 shows a variant of the relative position and shape of grooves made at an angle to the axis of the posts; in fig. 7 is a graph of torsional vibrations obtained when making grooves at an angle to the axis of the uprights; in fig. 8 is a variation of the relative position and shape of the arcuate grooves; Fig 9 is a graph of torsional vibrations of the spindle when performing grooves in the form of circular arcs.

The vibrating head includes a housing 1 in which a spindle 2 with a transition sleeve 3, carrying tool 4 (for example, a drill bit, reamer, countersink, die tap) is installed, a round cutter can be fixed directly to the spindle (Fig. 2). Inside the housing 1 at the end of the spindle 2 is fixed U-shaped leash 5, on the racks of which diametrically opposite sections are made inclined or curvilinear grooves 6 hours 7 On the side surface of the housing 1 there is an electric motor (or hydraulic motor) 8. The shaft of the engine 8 is kinematically connected With disc 9, rollers iO, mounted on radially arranged fingers 11 g, with the possibility of rotation and alternate interaction with grooves 6 and 7 of the U-shaped driver 5. In this case, the disk 9 is located inside the driver 5 in such a way that the axis of the spindle 2 Single dne- axis 9 intersect at an angle a (in particular).

The vibratory head operates as follows.

The vibratory head is mounted on the longitudinal or transverse calipers of a multi-spindle automatic lathe.

When the motor 8 is turned on, the disk 9, the rollers 10 of which fit into the slots 6 and 7 of the U-shaped leash 5, is rotated, while the inclined or curved grooves 6 and 7 alternate with the rollers 10.

In the process of interaction of the slots 6 and 7 with the rollers 10, the last cuts are sideways

five

5 0 5 ,,

five

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surface of the grooves, which reduces wear.

When the roller 10 interacts with the groove 6, the U-shaped leash 5 together with the spindle 2 rotates by an angle and

After the roller 10 leaves the groove 6, another roller 10 enters the opposite groove 7 of the driver 5. In this case, the U-shaped driver 5 with the spindle 2 rotates in the opposite direction to the same angle d).

Thus, when rotating the disk 9, the U-shaped leash 5 performs torsional oscillations with an amplitude iJ

"-four.

where A is the arc deflection of the slots of the leash 5

circumference of contact; r is the radius of the contact circle. The frequency of torsional vibrations / is determined from the equation

r Mr | T - schG where z is the number of teeth of the wheel 9;

n - the number of revolutions per minute of the gear

wheels 9.

By changing the shape of the slots 6 and 7 of the U-shaped driver 5, it is possible to change the shape of the vibrations of the spindle 2 (Fig. 7, 9).

In particular, without taking into account the error caused by the circumferential movement of the roller 10 with the rectilinear slots 6 and 7, the spindle 2 oscillates in a triangular form. When slots 6 and 7 are made in the form of circular arcs, the beginning and end of which lie in a plane perpendicular to the axis of the disk 9, the spindle 2 oscillates in a sinusoidal form.

Claims (3)

1. A vibration head, in the case of which a spindle is located, kinematically connected with an engine shaft, characterized in that, in order to expand technological capabilities, the head is provided with a U-shaped fastener fixed on the spindle with grooves in its racks kinematically connected with the shaft motor disk, radially located on the periphery of the last fingers and placed on them rollers mounted with the possibility of alternate interaction with the grooves. 2. A vibrating head according to claim 1, characterized in that the grooves in the stands are made at an angle to the axis of the latter. 3. A vibration head according to claim 1, characterized in that the slots in the stands are made in the form of circular arcs. I gif  X X 2 Have 99frfr8 i 1484466 / 7- / 2 YU eight eleven cpus five FIG. AT FIG. eight FIG. 7 & R FIG. 9