SU697304A1

SU697304A1 - Grinding machine feed mechanism

Info

Publication number: SU697304A1
Application number: SU762389174A
Authority: SU
Inventors: Юрий Тихонович Ермоленко; Дмитрий Николаевич Шулятьев
Original assignee: Предприятие П/Я Х-5618
Priority date: 1976-08-01
Filing date: 1976-08-01
Publication date: 1979-11-15

Description

II

Изобретение относитс к станкам дл обработки изделий электронной техники, в частности роторов и статоров подстроенных конденсаторов, и может быть использовано во всех отрасл х промышленности дл прецизионного шлифовани плоских поверхностей .The invention relates to machine tools for the processing of electronic products, in particular rotors and stators of attached capacitors, and can be used in all areas of the industry for precision grinding of flat surfaces.

Известны механизмы подач, содержащие рабочий кулак с приводом враш,ени , взаимодействуюш .ий со шлифовальной бабкой, обеспечива ее перемеш.ение 1.Known mechanisms feed, containing a working fist driven vras, eni, interacting with grinding head, ensuring its mixing 1.

Такие устройства не позвол ют измен ть скорость вращени кулака в пределах цикла , что вызывает необходимость замены кулака при изменении технологических параметров .Such devices do not allow changing the rotational speed of the cam within the cycle, which necessitates replacing the cam with changing process parameters.

Целью изобретени вл етс обеспечение перемещени шпиндел с инструментом на деталь со скоростью, измен ющейс по закону, соответствующему оптимальным режимам обработки, с усилием, не превышающим допускаемого механической прочностью обрабатываемой детали, а также точности обработки.The aim of the invention is to provide movement of the spindle with the tool to the part with a speed varying according to the law, corresponding to the optimal machining conditions, with a force not exceeding the allowable mechanical strength of the workpiece, as well as the machining accuracy.

Указанна цель достигаетс тем, что устройство снабжено дополнительным кулачком , установленным соосно с первым, и управл ющим элементом регулировани скорости вращени рабочего кулака,кинематически св занными между собой.This goal is achieved by the fact that the device is equipped with an additional cam mounted coaxially with the first and control element controlling the rotational speed of the operating cam, kinematically connected to each other.

На чертеже изображен предлагаем1,|й механизм.The drawing shows the proposed 1 st mechanism.

На станине 1 закреплен вращающийс столик 2 с планшайбой 3, на базовой 11и1зе).чности которой установлены обрабатываемые детали 4. По шариковым направл юпи1м 5 перемещаетс щпиндель 6 (например,электрошпиндель ) с инструментом 7. На крон1птейне 8 шпиндел установлен регулировочный винт 9, опирающийс на высокочастотный щарикоподн1ипник 10, который закреплен на эксцентрике 11. Причем наружноеA rotating table 2 with a faceplate 3 is fixed on the base 1, and the machined parts 4 are mounted on the base 11 and 1 of the bar. on the high frequency ball rim 10, which is fixed on the eccentric 11. And the outer

Claims

the ball bearing ring is braked 6; ia - the godar presence of the brake 12, as a result of which sliding friction between the parallel and the eccentric is eliminated. The eccentric is mounted on the output shaft 13 of the actuator 14, on the opposite end of which a cam 15 is attached, kinematically connected via a lever 16 to a potentiometer 17 that controls the drive-drive motor 18. Using a counterweight 19. connected by a cable 20 and blocks 21 with a spindle, the pressure of the tool on the part is adjusted. The device works as follows. At the beginning of the cycle, the eccentric 11 holds the spindle in its highest position. After turning on the motor 18, the spindle 6 with a circle 7 is mixed in the feed direction from the eccentric 11, it is determined that the sinusoidal law of variation of the feed rate is that when the wheel touches the workpiece, the circle at the initial part of the sinusoid provides a smooth entry of the circle into the part at a small value feed rate with a subsequent increase in the latter to the optimum. Upon reaching the highest feed rate permissible for a given material of the part, the cam turns potentiometer 17, which changes the resistance in the motor core circuit 18. This achieves a change in the speed of the latter, which ensures a constant optimal feed rate. During processing, the value of the removed allowance increases, the thickness of the part decreases. Upon reaching the workpiece with a thickness at which the mechanical strength of the part begins to depend mainly on the amount of pressure of the tool on the part (and hence on the value of the feed rate), due to a predetermined specific cam profile, the potentiometer associated with it reduces the feed rate in proportion to thickness details. Thus, by adjusting the feed rate, adjusting the circle pressure on the workpieces, and due to the small friction errors in the screw-support-eccentric chain, parts from hard and brittle materials are processed to a thickness of 0.03 mm with high accuracy. Claims An grinding machine feed mechanism comprising a rotationally actuated fist, installed with the possibility of contact with a movable grinding headstock, characterized in that, in order to ensure the movement of the spindles according to a certain law. The HE is equipped with an additional cam, mounted coaxially with the first, and a control element for controlling the speed of rotation of the cam, kinematically connected to each other. Sources of information taken into account in the examination 1. Mechanical Engineering. Encyclopedic Reference, Vol. 9, M., 1949., P. 530, fig. 7