SU884974A1 - Apparatus for finishing spherical surfaces - Google Patents

Description

(54) DEVICE FOR ARRANGEMENT OF SPHERICAL SURFACES

I

The invention relates to diamond abrasive machining of spherical surfaces.

A device for finishing spherical surfaces is provided, equipped with cup tools mounted on two spindles and equipped with a tool clamping mechanism to the workpiece surface l.

A disadvantage of the known device is the low machining accuracy due to the high dynamic loads of the technological process.

The purpose of the invention is to improve the quality of processing.

The goal is achieved by the fact that the device is provided with elastic, flexibly tensioned elements installed around the circumferences, coaxially with the axes of rotation of the spindles between the supporting ends of the latter, and the faceplates inserted into the device for fastening the tool.

FIG. 1 shows a device for finishing spherical surfaces, a general view; in fig. 2 - location of several identical circles on the faceplates at an angle to the spindle axis when the diameters of the tool used are smaller than the width of the workpiece.

Claims (2)

The device has two diametrically located spindles 1. mounted on rolling bearings in their housings. 2. The flanges of the spindles are integral with the sprockets 3, which are connected to the gearbox 4 countershaft gear HbiNM gears and sprockets 5. Planch plates 6 for fastening on one spindle-. Circles 7, and on the other, circles 7 and 8 are fixed on the flanges of the spindles by means of elastic elements 9, the preliminary tension of which is given by the size of the spacer sleeves 10 when the figured washer 11 is tightened with screws 12. Spindle I and the figure based washer 11 are set screws 12 and spacers 10, form a sort of 38 squirrel wheel inside which a faceplate 6 is mounted movably along the axis, which is pressed to the clamping washer by elastic prestressed elements 9. A sleeve 13 is attached to the body of one of the spindles th - rod 14 of the total hydraulic cylinder. Each spindle body has guide elements connected to common guides mounted on a machine longitudinal table (not shown). The counterdrive cutter 4 is located between the housing 2 and has two splined ends of the output shaft which freely enter the drive sprockets of 5 chain drives. Dp of machining parts whose width is greater than the diameter of the cup wheels (Fig. 2) are tilted to the axes of the spindles by an angle of ° C and set so that their axes pass through the center of the machined sphere O, and the diameter O of the circle of the most distant points the tools are larger than the width B of the part, and the diameter d of the circle where the least distant points of the instruments are located is smaller than the width B of the part. In the above example, four circles are installed on each faceplate (only two are visible in the section). The device works in the following way. From the electric motor, rotation of the gearbox 4, sprockets 5, planted freely in the axial direction at the ends of the gearbox shaft, and through the chain transmission of spindle 1 with circles 7. The longitudinal table of the machine moves forward and inserts spvdeldel in the workpiece 15, receiving processing time rotational motion. Oil pressure is supplied to the cavity of the hydraulic cylinder, the sleeve of which, together with the housing and the spindle, moves in one direction, and the stem with the other housing and opposite to the circles with opposite zones of the treated sphere. At the same time, the drive sprockets of chain drives slide along the slit ends of the countershaft reducer shaft together with the spindle housings. The initial tangent of circles with the machined sphere occurs along the edge to which the axes of rotation of the spindles are displaced. Under the action of the resulting reaction from the side of the workpiece along this edge, the elastic elements of the faceplate are deformed, the latter is rotated at a certain angle. So that the axis of rotation of the circles is aligned with the center of the sphere to be processed and the fit and processing of the tool over its entire width occurs. Effort of a clip of circles a hydraulic cylinder -. The groove to the treated surface is less than the total preloading force of all the elastic elements of the faceplate suspension, therefore, the compression of all of them simultaneously under the action of the hydraulic cylinder force is eliminated. In this case, the pressing forces of the circles to the part balance each other and are practically not transmitted to the base elements of the workpiece. After the processing is completed, the oil pressure is supplied to the cavity b of the hydraulic cylinder, the casing 2 with spindles 1 is retracted from the part, the longitudinal table removes the tool head from the part, the part stops rotating, the processing cycle ends. The connection of the faceplate with a tool with spindles by means of prestressed elastic elements simplifies the design of the device, provides the possibility of processing the internal surfaces, and also allows you to assign the AonycTHNbie properties to the tool mode to the maximum. processing to improve process performance. Installation on one spindle coaxially with several circles of different diameters significantly increases the machining accuracy, and installing several identical circles at an angle to the axes of the spindles allows machining parts of any width regardless of the diameter of the cup circles, excluding the part axis swing mechanism. The device for finishing spherical surfaces, equipped with cup tools installed on two spindles and equipped with a pressing mechanism, tools to the workpiece surface, characterized in that, for the purpose of higher .55 quality of processing, the device is equipped with elastic circumferential axes 58849746 rotation spindles mevdu reference torus-Sources of information of the latter, and introduced, into devices taken into account in the examination of OumenGa ™ slander inst-1. USSR author's certificate  179648. кп. B 24 B 11/10, 1966 2