SU916120A1 - Apparatus to lathe for working eccentric holes - Google Patents

Description

The invention relates to machine tools and can be used in lathes when machining parts such as flanges with eccentric holes.

A device for processing $ eccentric holes is known, comprising a housing, a flange in which tool spindles are rotatably mounted, and a drive faceplate mounted on the housing, eccentrically to the flange and connected by eccentric fingers with tool spindles [1)

(A disadvantage of the known device is the impossibility of processing ¹⁵ holes in rotating parts simultaneously with the processing of the side surface, as a result of which labor productivity decreases.

The purpose of the invention is to increase productivity.

This goal is achieved by the fact that the flange and faceplate snab2

wives with toothed rims and kinematically connected to the spindle through a pulley inserted into the device with an internally toothed rim mounted in the housing with the possibility of interaction with the toothed flanges of the flange and faceplate, while the flange with tool spindles is aligned with the machine spindle, and the total gear * number of spindle-flange kinematic chain - face plate is made equal to one.

The drawing shows a princess scheme of the device.

In case 1, flange 2 and drive plate 3 are mounted with the possibility of rotation around their axes. The flange is mounted coaxially with the part 4 fixed in the spindle 5 of the automatic lathe. The drive faceplate is mounted eccentrically relative to the flange. Tso flange 2 "fixed tool spindles 6, bearing cutting tools 7, spaced '

four

3,91612 (

zhynny according to the processed openings. The spindles 6 are equipped with crank fingers 8, the eccentricity of which is equal to the face plate eccentricity. The fingers enter the 5 • version 9 of the drive face plate. The flange 2 and faceplate 3 are equipped with gear rims that engage with the internal gear crown of a pulley 10 mounted in a 10 multi-spindle head and connected to the spindle 5 of the machine by means of gears 11 and a telescopic shaft 12. The gear ratio of the spindle-flange kinematic chain is 15

faceplate is one. The device is installed in the guides of the frame 13 of the machine with the possibility of longitudinal movement, in the mode of axial feed 5. 20

The device works as follows.

After turning on the machine, the workpiece 4, fixed in the spindle 5 of the machine, begins to rotate with a certain number of revolutions. Due to the fact that the total gear ratio of the kinematic chain connecting the spindle 5, flange 2 - and drive faceplate 3 is equal to one, the latter will rotate at the same angular speed and in the same direction as the part. With respect to the part 4, the cutting tools 7 will be fixed, and the relative movement between the flange 2 and the drive faceplate 3 is a translational movement around a circle of radius equal to the value of eccentricity.

Due to this crank fingers 8, located in the holes 9 of the faceplate, will start to move around the circumference with the same radius.

as a result, the cutting tools 7 fixed in the spindles 6 will begin to rotate around their axes. Informing the multi-spindle head to move the axial feed, the cutting tools 7 will begin to process the holes in the part 4. At the same time, the side surface of the part is machined with a cutter.

Such an implementation of the devices allows you to improve performance.

Claims (1)

Claim A device for a lathe for machining eccentric holes, comprising a housing, a flange in which tool spindles are rotatably mounted, and a drive face plate mounted eccentrically to the flange in the housing and connected with eccentric fingers to the tool spindles. that, in order to increase labor productivity, the flange and faceplate are provided with external gear rims and are kinematically connected to the machine spindle through a pulley with an internal gear rim inserted into the device, installed in the housing with the possibility of interaction with the flange and face gear rims, (flange with tool the spindles are set coaxially with the spindle of the machine, and the total gear ratio of the kinematic chain spindle-flange-plate is equal to one.