SU1065165A1 - Apparatus for single-side lapping of parts - Google Patents

Abstract

1 .. A DEVICE FOR A UNILATERAL DETAIL RELEASE, comprising a housing with a drive shaft mounted therein, associated with the part holder by means of two eccentric mechanics connected in series and a planetary gear unit characterized by the / H7L in order to improve the quality of processing, the device is fitted with a fixed the shaft is a radial driver with a gear-satellite assembly that engages with a planetary gear sun gear freely mounted on the drive shaft and a gear fixed on The mechanism of the eccentric shaft of the second. 2, The device according to Claim 1, about which the device is equipped with an additional drive gear mounted in the housing that meshes with the sun gear.

Description

The invention relates to abrasive machining and can be used to finish flat surfaces of parts. A device for one-way refinement of parts is known, comprising a housing with a drive shaft mounted thereto, connected to the parts holder by means of two successively connected eccentric mechanisms and a planetary gear and. The disadvantages of this device are the relatively low quality of processing and the inefficient use of the area of the finishing disc due to the simple kinematics of movement of the flown fly,. The purpose of the invention is to improve the quality of processing. The goal is achieved by the fact that the chuo device for one-sided finishing of parts, comprising a housing with a drive shaft mounted therein, connected to the parts holder by means of two successively connected eccentric mechanisms and a planetary gear, is provided with a radial leash fixed on the drive shaft with the gear-gsatellites unit, the input to the gearbox with the sun gear mounted freely on the drive shaft of the ethereal gear and the gear mounted on the shaft of the second eccentric mechanism , Furthermore, the apparatus is provided with a housing mounted in hydrochloric additional driving gear, extending into engagement with the sun gear, FIG. Figure 1 shows the principle of the device on the diagram; in Fig. 2, the trace of movement of the part to be processed is on the finishing disk with a gear ratio of M to FNG 3 - that is, for the figure of 4, the trace moves the workpiece when the direction of rotation changes. the shaft of the second eccentric mechanism on the reverse of Noah; , FIG. 5 shows the trace of movement of children when the eccentricity of the second mechanism changes. The device comprises a housing 1, in which a first eccentric mechanism is placed, containing a drive shaft 2 with crank 3, and a second eccentric mechanism containing shaft 4 with a crank 5. Mechanisms “l may have equal and unequal between themselves eccentricities 0, and BJ B On the bearings 1, a sun gear is mounted on the bearings, rotating on the shaft 2 and connected with the additional drive gear 7. On the drive shaft 2, a radial leash 8 is fixed with a block of gear gears 9 and 10. The shaft 4 is equipped with gear 11, Zana with sun gear 6 through gear unit 9 and 10. Shaft support 4 is made on crank 3, and crank 5 has a telescopic connection 13 with holder 14 of the workpiece 15, located in mandrel 16 and pressed to finishing disc 17 using individual clamp 18. In the mandrel 16, several parts can be simultaneously installed. The device works as follows. . The shaft 2 receives rotation from a drive, for example an electric one, and transmits it to the leash 8 and to the crank Zo Gear 9 runs with the sun gear. 6, and the attester 10, through gear 11, drives the shaft 4 of the second eccentric mechanism, with the crank of which the workpieces 15, grow around the axis of the shaft 4, are coupled. Simultaneously, the shaft 2 goes through 1 rive. 3 causes the second mechanism to rotate relative to the axis of the shaft 2, in addition, the workpiece is rotated around its axis ,. Thus, the workpiece 1.5 is brought into complex motion relative to the finishing disc. In the general case, the details on the surface of the finishing disk (without taking into account the proper rotation of the part) are a cycloid, the form of which is determined by the gear ratio 1 by the shafts of the first and second mechanisms. The transmission ratio and the direction of rotation of the shaft 4 are changed by means of a drive gear 7j which can be associated with a gearbox, a CVT or a DC motor with thyristor control. It is known that a cycloid is obtained as a trace of a point of a circle rolling without sliding along a fixed circle of a larger radius. The type of cycloid depends on the ratio (and) of the radii of the fixed and movable circles; when cycloid degenerates into the diameter of the larger circle, when it has the form of a closed 3-loop line, when - the form of a closed 4-loop line, etc. In the proposed device type cyc-. The loids are changed by changing the ratio of the rotation frequencies of WAPS 2 and 4. In the case where the directions of rotation of the shafts are opposite (and the frequency of rotation of the second shaft is twice the frequency of rotation of the first shaft, part 15 moves along diameter b (the best circle, radius of which is equal to the sum of eccentricities + e. lry equal

rotational speed of the part is rotated in a circle of radius e-,. .

With the frequency ratio, with the three of them, we have a 3-loop cycloid, with a ratio equal to four - a 4-loop cycloid, etc. The loops of these cycloids are directed outwards (Figs. 2 and 3). If the directions of rotation of the shafts of the yid coincide, the cycloid changes and their loops turn inward (Fig. 4). Change the length of the crank of the second mechanism () line of the cycloid relative to the track of the primary shaft (figure 5).

When the ratio of the frequency of rotation of the shafts, representing an irrational number, traces remain in the finishing disk in the form of an infinite number of loops that are circumferentially displaced relative to the trace of the axis of the first shaft. For example, with a fractional transfer ratio, 242 on the finishing dis

X Direction Spau (e i / jff / attaao ffft / xef an Kpt / Sou / u / rof ffe coSmfffffm e / mz i / Fig. 2

Ke issued 3242 loops, evenly distributed in a circle. Pa this requires 1000 revolutions of the first shaft. Without a change in gear ratio over the next 1000 revolutions, the part again passes 3242 chains.

Thus, the proposed device significantly complicates the pattern on the surface being processed and thereby improves the quality of processing, the ability to control the kinematics of the motion of the part and influence the type of cycloidal motion paths of the part allows the effective use of the surface of the finishing disk and deposited on its surface. abrasive material. At the same time, the manufacturing efficiency of the treatment, incl. and by passing the part of a larger path in one revolution of the drive shaft.

Syed dema / ia DLEZ DETE / GS / Fug.Z

Trace ffe / rm / iu

Direction SpaufCffux rrpuSou / urToS coSfra ae / n

FIG.

Claims (2)

(54) 1 .. DEVICE FOR SINGLE-SIDED FINISHING OF PARTS, comprising a housing with a drive shaft mounted in it, connected to the part holder by means of two eccentric mechanisms connected in series and a planetary gear different in order to improve the quality of processing, the device is equipped with a radial mounted on the drive shaft a leash with a block of gears-satellites engaged with a planetary gear sun gear mounted freely on the drive shaft and a gear fixed to the shaft orogo eccentric mechanism. 2. The device according to claim 1, about l and ¹ , wherein the device is equipped with an additional drive gear installed in the housing, which engages with the sun gear Fig. / I