SU856679A1 - Drive of sprindle for vibration cutting - Google Patents

Description

(54) SPINDLE DRIVE FOR VIBRATING CUTTING

one

The invention relates to a machine tool industry, in particular to power heads of metal-cutting machine tools, which are processed by the method of vibration cutting.

Spindle drives for vibratory cutting are known, comprising a housing in which a crank mechanism with a slider is housed, transmitting an oscillating movement to the rod

A disadvantage of the known drives is the inability to: smoothly adjust the amplitude of the oscillation.

The purpose of the invention is to provide a smooth adjustment of the amplitude of oscillations.

This goal is achieved by the fact that the drive is equipped with two levers pivotally interconnected by a common axis, one of which is pivotally connected to the housing and the other with. a rod, a holder with guides and a mechanism for their fixation mounted on a slider with the possibility of reciprocating movement, rollers mounted on a common axis of the levers with the possibility of contacting with the guides

the latter are rotatable, and the dependence of the amplitude of oscillations of the rod on the angle of rotation of the guides is determined by the expression

4v4 4Ve 8 4eFfW2

where ..X is the amplitude of stock oscillations; f and L - respectively, the length 4aroBf

o (is the angle of rotation of the guides;

e is the eccentricity of the crank pin of the drive shaft.

FIG. 1 shows the proposed drive, cut; Fig. 2 - the same, top view; in fig. 3. - section A-A 20 in FIG. one.

Claims (1)

 The spindle drive contains a shaft 1 with a crank pin 2, a connecting rod 3, a slider 4 mounted in the grooves of the front and rear walls of the housing 5. On the 25 slider 4 with a bolt 6 A holder 7 is fixed in which the guides 8 and 9 are located. The levers 10 and 11 are connected axles 12 and 13 with rear bearing 14 and stem 15. On common ori 16 levers 30, rollers 17 and 18 are mounted. To fix the rotation of the holder 7 with guides 8 and 9, serve screws 19. Projections and holder 7 located between the thrust plates 20 and 21 are made along the radius for the possibility of rotation of the cage relative to the bolt 6. The drive operates in the following way. When the shaft 1 rotates, the slider 4 communicates the reciprocating motion by means of a crank drive mechanism. Together with the slider, the holder 7 moves with the guides 8 and 9. The rollers 17 and 18, tracking the movement of the guides, are displaced in the horizontal plane from the common longitudinal axis of symmetry of the levers 10 and 11, one way or the other, and rotate the levers relative to axes 12 and .13. When the rollers 17 and 18 are moved and the levers 10 and 11 are rotated, the distance between axes 12 and 13 decreases and vice versa, this distance increases with reverse movement until the symmetry axes of the levers 10 and 11 coincide with their common longitudinal axis. Thus, the rod 15 is reported reciprocating movement ,. During one revolution of the drive shaft 1, the rod 15 makes two complete oscillations. By varying the angle of rotation d of the guides 8 and 9 with screws 19, the displacement of the rollers 17 and 18 is adjusted, which leads to a change in the amplitude of the oscillations of the rod 15. The dependence of the amplitude of the oscillations of the rod is from. the angle of rotation of the guides is written by the expression - .. where L is the amplitude of oscillations of the rod; I and ,, respectively, the length of the lever oL - the angle of rotation of the guides e - the eccentricity of the crank pin of the drive shaft. The proposed spindle drive design for vibratory cutting ensures smooth adjustment of the magnitude of the oscillation amplitude of the rod. This broadens the range of application of the drive and makes it possible to use it on the optimal modes of treating parts with different sizes and mechanical properties of materials by the vibrating method. The invention provides a spindle drive for vibratory cutting, comprising a housing in which a crank mechanism with a slider is housed, transmitting an oscillating movement to a rod, characterized in that, in order to provide a smooth control of the oscillation amplitude, the drive is equipped with two arms pivotally connected between one common axis. , one of which is pivotally connected to the housing, and the other with a rod, a clip with guides and a mechanism for fixing them, mounted on a slide with the possibility of reciprocating movement, role, by us mounted on a common axis of the arms with the possibility of contacting with the guides, the latter being can rotate, and the dependence of the amplitude of oscillations of the rod on the angle of rotation of the guides is determined by the expression - & rt2l- Ve (et ci / 2rWtt- (where is the amplitude of oscillations of the rod; I and, accordingly, the length of the levers; guides; e - eccentricity of the crank pin of the drive shaft. Sources of information taken into account during the examination 1. USSR author's certificate 602311, class В.23 В 47/04, 1974.