SU846285A1 - Device for ultrasonic finishing of planar surfaces - Google Patents

Description

I

The invention relates to mechanical processing, in particular, to the technique of finishing hard brittle materials, and can be used in the instrument-making industry in processing flat surfaces of semiconductors and dielectrics, as well as in the jewelry industry for processing planes of products made of ruby, sapphire, agate,

shmy etc.

A device for ultrasonic treatment is known, which comprises an attachment attached to the end of the transformer of longitudinal vibrations, in which the processing is carried out by imparting jj and the product of complex relative motion in a plane perpendicular to the direction of ultrasonic vibrations of the PD

Closest to the proposed x is a device for ultrasonic debugging of flat surfaces containing a lap, a ring adapter and a waveguide C23.

A disadvantage of the known devices for ultrasonic treatment is the uneven wear of the pritier, which is manifested due to the uneven distribution of the amplitude of ultrasonic vibrations over its working surface, which leads to a decrease in the processing accuracy - suppressing the deviation from the flatness of the treated surface of the product, which reduces the quality of the finishing.

The purpose of the invention is to improve the quality of refinement.

Claims (2)

The goal is achieved by the fact that ycTptriiCTBo for ultrasonic finishing of flat surfaces, containing ground prints, ring loops, magnetostrictive transducer and volyrvod, is provided with a means of orientation of the priter relative to the surface being treated, made in the form of a housing, inside of which is adapted to be recoverable. , and elastic elements connecting the housing and the ring box. The device is equipped with adjustable lugs fixed on the non-working end part of the lap. FIG. 1 shows the device, a general view; in fig. 2 - section A-A on. one; in fig. 3 - the first stage of the device operation; in fig. 4 - the second floor of the device. The device contains ground 1, a ring prefix 2 attached to it, a magnetostrictive transducer 3, from which the ultrasonic vibrations are transferred through ground 1 through ball 4 and waveguide 5 to ground priter 1. At 1, there is an annular juice on which parts 6 are glued on plan 7 interacting with the driver 8. To press the waveguide 5 to the ball 4. there is a spring 9, the pressing force of which can be adjusted by a cover 10 connected by a threaded connection with a cup 11 fixed on the frame of the machine 12. The device is equipped with an ori the alignment of the priter against the machined surface, made in the form of the housing 13 inside which the sleeve 14 is installed with the possibility of reciprocating movement of the sleeve 14. The housing 13 is connected with an annular attachment 2 by elastic elements 15. The priter has adjustable stops 16. The device is operated in two stage. At the first stage of operation of the device, the annular attachment 2 is retracted to the lowest position. The lap I receives ultrasonic vibrations through the waveguide 5 and the ball 4 from the concentrator of the magnetostrictive transducer 3. If, for example, lap 1 made of cast iron, has a diameter of 100 mm and a thickness of 15.8 mm, then when ultrasonic vibrations are applied (ultrasonic with frequency, l kHz , grinding in the collet in the form of oscillations, which has two nodal circles (Fig. 3). The distribution of the amplitude of the ultrasonic inspection over the surface of the grinding in this case is shown. Eight 17. When machining parts 6 glued to the plan 7, the wear of the working surface of the grinding in is uneven more where b After the deviation from the flatness of the worn surface of the priter reaches its maximum permissible value, it proceeds to the second stage of the device operation. At the second stage of the device operation (Fig. 4), the ring attachment 2 is attached to the priter 1 and fixed to it. The lap 1 and the ring attachment 2 oscillate as one piece when applying the UZK. If the thickness of the ring attachment is 15.8 mm, and the outer diameter is 140 mm, then when applying the ultrasonic scanner with a frequency of -, s 23 kHz the lap with the ring attachment oscillates in shape second, the circles having two nodes, five. The amplitude distribution of the UST is shown for this case with a plot of 18 (figure 4). Within the limits of the worker, on which parts 6 are processed, the amplitude distribution of the ultrasonic inspection is such that the amplitude has the smallest value in the area where the amplitude was maximum at the first stage of operation and vice versa, within the working height, the second ultrasound amplitude is observed in the regions where, at the first stage, the amplitude of the ultrasonic inspection was minimal. Thus, when machining parts, parts of the priping surface of the primer are more intensively worn out, which at the first stage of work have the least wear, and further wear of the most terribly worn areas of the priter section at the first stage of operation of the device is slowed down. Consequently, the shape of the working surface of the priter approaches flat, i.e. There is an edit to priter without interrupting the processing of parts. In order to eliminate acoustic energy losses in the second stage of operation of the device, the annular attachment 9 is fastened with bolts 19. The adjustable stops 16 move into the groove of the flange of the housing 13 with screws 20. Thus, bolts I9 are installed at points corresponding to the nodal circle and the acoustic There are no signals related to the mounting of the ring box 2. Experiments show that the imposition of ultrasonic vibrations makes it possible to increase the productivity of refining fragile materials (synthetic sapphire) by a factor of 6–8 compared to conventional, and viscous materials (stainless steel X18H10T) are 2.5–3.0 times, 58 while the roughness is the treated surface does not deteriorate. Claim 1. Device for ultrasonic finishing of flat surfaces, containing priter, ring adapter, magnetostrictive transducer and waveguide, characterized in that, in order to improve the quality of polishing, it is equipped with a pritier orientation tool relative to the treated surface, made as a housing, inside which is installed with the possibility of reciprocating movement relative to the waveguide sleeve, and elastic elements connecting the housing and the annular attachment. 2. A device according to Claim I., characterized in that it is provided with adjustable stops fixed to the non-working end part of the ground. Sources of information taken into account during the examination 1. LD Rosenberg. and others. Ultrasonic cutting. M., 1962, p. 152. 2. Gontkevich B.C. Own oscillations of plates and shells, K, Naukova Dumka, 1964, p. 46-47 (Drot-type) .11 IGGShTPKlGGT //////// t -; - ipue.l f7 s ± U 1 / 7/77 / y. S Tzz