SU394171A1 - DEVICE FOR CUTTING INNER THREAD BY ULTRASOUND - Google Patents

Description

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The invention relates to a 1M device for cutting internal threads with taps with imposing on 1 ultrasonic and ultrasonic pickers (Designed for use in I ShI-Nost 1 1 and iRoborostroenie for manufacturing parts: FROM hard-to-be steels and.

There are known devices for cutting threads through ultrasound, made in the form of a waveguide, IB axial bore; the XIBOCTOBHIK tap is located there, connected to it by means of a fastening element and provided with an acoustic contact between the arbors for the acoustic contact between them.

In such devices, marking the marker to the waveguide is inconvenient in operation, so difficult is the tool, besides, and the ultrasonic oscillation amplitude of the marker must change as the condition of the cutting condition changes. To prevent cutting teeth from tinting (deterioration of the quality of the threaded surface at the time of cutting into 2-3 threaded turns, the amplitude of its oscillations should be minimal. Next, Me; re deepening the tap hole and increasing the cutting forces should gradually increase the amplitude of oscillation to a maximum of 1). taps values. When the exit of the intake cone.

through hole and prn its vystyrvanin, i.e., with a decrease in cutting effort, it is necessary to turn off the ultrasonic vibrations to the minimum values.

According to experimental data, the optimum value of the amplitude of vibrations of the tap MB in the process of cutting a single hole and the value of Z varies from 2 microns when the first 2-3 threaded turns reach 10 microns with a full deepening of the intake coius. In the process of ultrasonic threading of dolmnech, the first link between cutting and tsb) is the value of the amplitude of oscillations. The known devices for ultrasonic threading with rigid fastening of the metal to the waveguide do not allow such a connection to be maintained between the cutting forces and the amplitude of oscillations.

To adjust the amplitude of the vibrations of the tap due to the automatic change of the acoustic contact between the tap and the waveguide in the proposed device, the coupling of the shank of the tag with the waveguide in the axial hole is made with a gap, and perpendicular to the axial hole of the waveguide the through groove with walls inclined relative to the waveguide end is made with one direction which, depending on the direction of rotation: 1 of the waveguide, enters into the interaction of the cr & amphitheater element passing through the tails to and the waveguide. The angle between the end of the waveguide and the pelvic wall, which interacts with the fastener, can be 15–40 °, and during reverse rotation it can be SHO.

FIG. 1 shows the described device, a general view; in fig. 2 is a view along arrow A, and the joint node of the shank of the tap with the waveguide.

The device has a waveguide / with a 1NOD hole with a shank of 2. baler 3 and one or more iOK BO3HHiM grooved 1 4 lined on the end. The sides of the groove are inclined by the IK butt end of the wave under the angle ai and 2 2. XBOICTOBHIK 2 marks 3 has a flange 5, it is equal ino to the meter of the waveguide cake 1, and pins 6, it is located in the perpendicular to the axis of the meter. The number of pins ((support elements) is equal to the number of grooves of the waveguide 1.

The device works with the following image Obrab. The workpiece 7 has a cut | M hole coaxially with the met. 3. H1VOSTOVI1K 2 marks of 3 to.this placed in the hole of the waveguide 1 THiK, so that the pins 6 are inserted into 1px; Next, B1 switches on the ultra-euphoric oscillations and reports the rotation and axial direction to the device or part 7. After inserting the axial axis of the oicy taps, the oicychosis is activated. During tool cutting, the cutting forces are small, the torque is small. Therefore, the force of the clamp 5 of the mark 3 to the end of the wave. Da /, arising as a result of the interaction of the pins 6 with the grooves 4 of the waveguide /, does not provide enough T1 pitch a1 acoustic / contact, and a: amplitude of the vibrations of the tap 3 1I | has a minimum value. As the hole goes into the cut hole, the screw turns. The moment increases, the power of the trim ring 5 increases (the hook 3 to the end of the waveguide i /, i.e. the acoustic contact between the switch and the wave increases. the house, and the amplitude of the vibrations of the tap increases. When the broom leaves the hole, the cutting forces gradually decrease, the current of the static contact is degraded, and the amplitude is 1k

tap. gradually decrease to zero. When turning out the | | Ka from the cut hole, the ultrasonic vibrations do not turn off, since the vibration amplitude of the tap is wired between a small torque M0: the mentality is insignificant. When threading M4 in the VT8 oplav, the angles .a.i and a, respectively, are 30-40 ° and 110 °, respectively. In the proposed design of the thread-cutting device, the force. Of the pressing tool for the WAVE-DOE, i.e. the acoustic contact length and the amplitude of the oscillations of the tap associated with it, is determined by the value of the cutting force and the angles between the ends

waveguide and groove walls. An automatic change in the amount of vibrations of the tap depending on the cutting conditions prevents the puncturing of the cutting KpOiMOK and contributes to an increase in durability of the marking and improvement in the quality of the threaded surface.

P. subject of the invention

1. A device for cutting internal re;

in the form of a waveguide, in an axial hole of which the SWITCH is fitted with a shank of the shank attached to HITM (by means of a fastening element and provided with a waveguide pressed against the end of the waveguide (between the beams, characterized by the fact that, for the purpose of adjusting a.M1Plate of solubilization of met. and.ka due to automatic changing of the acoustic contact between the bushing and the waveguide,

The articulation of the tailing of the tap with the waveguide in the axial hole is made with a gap, and the leneral is ocural oceiBoi.My the hole of the waveguide is made with a double slot with inclined walls relative to the waveguide wall.

A. One of which, depending on the direction of rotation of the wave, yields the said fastening element.

2. Device 1P. 1, characterized in that the angle between the end of the waveguide and the wall

the groove interacting with the fastener, 1 When the right rotation is equal to 15–40 °, and when it is turned back, it is PO-160 °.

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