UA9993U - Paddle polishing tool - Google Patents

Abstract

Paddle polishing tool for grinding of details of wood contains a set of brushes, coming out radially from the outer side of housing, polishing part executed in the form of paddles fastened on the bushings with possibility of winding inward the housing or unwinding. The paddles are cut into the strips of two widths and are located alternately in such a manner that they overlap the cuts between the paddles. The driving of all bushings is carried out simultaneously with the help of the mechanism of gears and hollow cylinder with external gear, inside which are located the balls for automatic balancing of tool.

Description

Description of the invention

The petal grinding tool (Fig. 1) is intended for abrasive processing of wood and can be used in the woodworking industry for grinding parts of a straight and curved profile.

The most well-known designs of petal abrasive tools can be divided into two groups: in the first group, the petals are fastened with the help of a binding material |1), in the other - mechanically, that is, with the help of bag holders or other accessories |2). The body of the tools of the second group can be used multiple times, replacing the grinding material after operation, so their use is more profitable compared to the tools of the first group. A significant disadvantage of both groups of such tools is the high consumption of useful, expensive material, as part of the segments of the grinding skin remain unused.

Closer in terms of design and characteristics is the petal grinding wheel |Z), which 12 includes a body, a set of flexible structural elements that protrude radially from the outside of the body structure and a set of separate segments of abrasive material that are placed in the body along the flexible structural elements. Each petal is independently wound inside the case or unwound outside. The stock of strips of grinding material allows to increase the coefficient of useful use of the grinding wheel, to ensure an almost constant working diameter of the tool. The main disadvantage of such a tool is the need for alternate individual adjustment of the length of the protruding part of the petals. The amount of activation of each petal in the radial direction (in the process of grinding wood) is the same, so there is no need to separately adjust the length of the protruding part of each petal, which requires additional time.

The task of developing a petal tool is to improve the quality of processed surfaces and save the grinding material of the petal. in

The task was solved by: - placing the petals cut into strips of two widths (narrower and twice as wide) in such a way as to cover the slits; - development of the design of a simple-to-manufacture mechanism for the simultaneous drive of all bushings, which perform the unwinding and winding of the petals; Ge") - placement of balls inside the case for automatic balancing.

The simultaneous drive of all bushings ensures a reduction in time spent on adjusting the working diameter of the circle. at

The drive includes a gear wheel and gears. Automatic balancing ensures a uniform force of pressing the tool to the processed surface of the part. Petals with a cutting width of 2.Bmm clearly repeat the processed profile, thanks to which the surface is well cleaned. In order to prevent the occurrence of uneven grinding of the material from the areas of the early and late zones (irregularities of elastic recovery) of the wood surface, after each narrow petal (Fig. 1, 6) a petal of greater width enters into interaction, which covers the slot between the narrow petals. 8

The body of the petal grinding wheel (Fig. 2) consists of a hollow cylinder 1, in which bushings 3 are attached. There are grooves for installing brushes along the outer perimeter of the body. Brushes and bushings with s petals of the grinding skin are fixed by cover 2. The petals of the grinding skin are wound into the inner cavity of the cylinder with the help of a gear wheel 4, which turns the bushings 3.

By turning the wheel 4, the length of the protruding part of all the petals can be adjusted.

It is possible to fasten the petals to the strips of fabric and then fasten them in the sleeves, thanks to which the sanding skin 42 can be used almost completely. The petals of the sanding skin should protrude relative to the brushes by 2...6 mm. The wheel is fixed in the working position in relation to the body with the help of pin 5. (se) When the protruding part of the petals is triggered, it is necessary to turn the wheel 4 with the help of a special key inserted into the grooves on the cover of the circle. » 20 surface is Kultakh - 40-45μm. To ensure proper quality of the surface with its initial roughness Kltah-40-45μm, it is necessary to apply the following processing modes: deformation of the circle in the radial direction -- 3...;5mm; cutting speed -- 15...19 m/s; feed rate - up to 6...1 Ohm/min.

The frequency of grinding and the grain size of the petals depends on the initial roughness of the surface and the requirements for the required roughness of the processing: with the initial roughness K bird - 40-45 μm, the initial roughness - Kyotakh Z2MKM, one-time grinding with petals with a grain size of ГЕ100...2150 is sufficient, with the initial roughness - K bird: 1 bμm it is recommended to sand the surface twice with E9O and E150 grain size petals.

Sources of information: 1. Patent O54302911, MKY 824013/04. Koyagu Par m/pee! Iure dgipaiipud (oo! my otsimagau Yaagipd Pyaarz / in G. Scieeg; Kygdderego acdivi GA.-Mo19800114299; Application. 01.22.80; Publ. 0О1.12.81 (mumluy.ezrasepei.sot). 2. Patent OB4090333, MKI/0244013 .

Mo19770781121; Appl. 25.03.77;

Publ. 23.05.78 (mlym. ezrasepei. sot).

Z. Pat. ORB58O71074, MKY 824 13/04. Sgipaipd m/peei / 9.). Meigapdo; TSO.K.Kapdyzshiogaayu; 0.0.5 and 65 (Japan); Mippezoia Mippipd 5 MONTHS.-Mo19820177481; Appl. 0О8.10.82; Publ. 27.04.83 (mly. ezrasepei. sot).

Claims (1)

The formula of the invention Petal grinding tool for grinding wood parts, containing a set of brushes that 2 protrude radially from the outside of the case, a grinding part made in the form of petals fixed on bushings with the possibility of winding inside the case or unwinding, which is characterized by the fact that the petals are cut on strips of two widths and are placed alternately in such a way that they overlap the slots between the petals, and the drive of all the bushings is carried out simultaneously by means of a mechanism of gears and a hollow cylinder with an external toothed wheel, inside which balls are placed for automatic balancing of the tool. that 2 (ze) then F (o) (o) . and? se) se) se) syu" So 60 b5