SU1076654A1 - Bearing support of metal-cutting machine spindle assembly - Google Patents

Abstract

BEARING SUPPORT FOR SPINDLE KNOT OF METAL THREADED MACHINES, containing bearings mounted on the spindle and a device for adjusting tension, executed in the form of a spring-loaded, cooperating, with bearings of the sleeve with windows, a sleeve mounted on the sleeve, and in- put, and in- put, and in- put, and in- put, and in this way, in the unit, and in the unit, and in- put, and in the in- put, and the in- put, and the in- put, and the in- put, and the in- put, and in the unit, in which the in- put, and in the unit, and in the unit, and in the unit, and in the unit, and in the unit, and in the unit, in which the in- put, and in the unit, and in the unit, and in the unit, and in the unit, and in the unit, the in- put, and in the unit, and in the unit, and in the unit, which will be injected and injected; In order to simplify the design, the tension adjustment device is equipped with plungers interacting with inertial weights, and in the spindle opposite to the windows of the bushings there are radial holes in which are placed us said inertial weights and plungers associated with sub pendulum through a channel formed by the recess and the protrusion podp pendulum sleeve and filled gidroplasto.m. (L o o: 05 JV

Description

FIELD OF THE INVENTION The invention relates to mechanical engineering, in particular to bearing supports of cylindrical assemblies of machine tools.

Closest to the present invention is a spindle-ioro bearing of a machine tool assembly containing spindle-mounted bearings and a device for adjusting tension, made in the form of a spring-loaded sleeve interacting with bearings, mounted on the hub, and inertial weights 1.

The specified device is difficult to manufacture.

1 | Invention - simplified design.

This goal is achieved by the fact that in; 1EDi1I1ikovoy support spindle assembly of metal cuttings, which contains the logs; ) bearings mounted on the spindle and mouth: () is to adjust tension on the spindle, made in the form of spring-loaded, interoperable .1, from the bearing. sleeves with windows, | A spindle mounted on the hub and inertial weights, the tension control device is equipped with plungers interacting with inertial weights, and in the spindle opposite to the bushing windows there are radial holes in which the inertial | -rueks and plungers associated with the follower are placed by means of a channel formed by the undercut of the bolster and the protrusion of the sleeve and the outer hydraulic hydr.

Ma FIG. 1 shows a bearing 0110) and with a tension adjustment device, a food section; in fig. 2 — node I in FIG. one; in fig. 3 shows section A-A in FIG. one.

The support of the spindle assembly of the metal-cutting machine tools contains bearings 2, which are mounted on the spindle 1, and a device for adjusting the tension, made in the form of spring-loaded, interacting with bearings 2, bushings 3 with windows 4, subtitle 5, mounted on sleeve 3, inertia weights 6, and plungers 7, interacting with inertia weights 6, and in the spindle 1 opposite the windows 4 of the sleeve 3 there are radial holes 8 in which the inertia weights 6 and the plungers 7 connected with the bolster 5 are placed through 9 dripped formed podp pendulum recess 5 and the protrusion of the sleeve 3, zapolpennogo GIDROPLAST. Inertia weights are made in the form of a composite rod 10 and a conical liner 11.

Podschinnikova support works in the following way.

At each moment of time, the magnitude of the tension of the PH in the bearing of the front support is formed by two forces: the effort to create the tension Rcr and the effort to relieve tension

PH

R, Rpr-yR ,.

The creation force of the tension is generated by elastic plates. The required value is provided when assembling the support by trimming the ends of the sleeve 3. The pull-off force is generated in the closed channel 9 with the hydraulic layer due to the fact that the plunger 7 creates pressure in the channel, functionally related to the spindle speeds.

With a fixed spindle 1 (Fig. 1)

The bearing gauge in bearing 2 is determined almost by the magnitude of the force P, p of the elastic elements 12, since the pressure in channel 9 is close to "O. In this case, 1 Rpr-PH, and.

At low revs, spindle 1 on it

Inertia weights 6 (Fig. 2) develop centrifugal forces PHN, which somewhat move the rod 10 with the pin 11 in the radial direction, squeezing the hydraulic valve in the closed cavity 9 by the plunger 7

f) up to the value of P defined by the expression

r rin

where P is the specific pressure of the hydroplast

in the closed channel 9; f is the cross-sectional area of the plunger 7. 5

In this case, the entire volume of the hydroplast in channel 9 acts on the walls of the bearing ring 5 of the sleeve 3 with the effort to relieve tension on dRn equal to

,

,

 where g - the area of the wall, formed by two skies, made on the sleeve 3 with a diameter of d and D

F 5r / 4 (D2-d2).

In the bearing of the front support is set to nat g equal to 5P p .rr

n Mip

The value of PF at low speeds is relatively small. The magnitude of the tension in the support is close to the mounting Rpr. The proposed support has a high rigidity.

0 At spindle speeds 1, close to the maximum for a given SHU, centrifugal force moves the rod 10 with the pin 11 in the radial direction up to the stop of the rod 10 into the sleeve 3, compressing the hydroplast in the closed channel 9 with the plunger 7 to the highest calculated value P. the volume of the hydroplast in channel 9 acts on the walls of the ring of the bushing 5 of the bushing 3 with the highest design effort to pull the tension on the pump. In bearing 2 is installed

the minimum design tension equal to F The support stiffness is somewhat reduced, however, its size is sufficient for high-quality finishing of technological operations (turning, milling and boring). A further increase in the speed of the spindle 1 is also accompanied by an increase in centrifugal forces on the inertia weights 6, but erased

Claims (1)

BEARING SUPPORT OF A SPINDLE ASSEMBLY OF METAL-CUTTING MACHINES, comprising bearings mounted on a spindle and a tension control device made in the form of a spring-loaded sleeve interacting with bearings with windows, a thrust bearing installed on the sleeve, and inertial weights, which are designed to simplify the construction , the interference control device is equipped with plungers interacting with inertial loads, and radial holes are made in the spindle opposite the sleeve windows, in which TED inertial weights and plungers associated with the thrust bearing through the channel formed by the recess and the protrusion thrust sleeve, and filled GIDROPLAST. Figure 1