SU844155A1

SU844155A1 - Portable apparatus for boring holes in large parts

Info

Publication number: SU844155A1
Application number: SU792826426A
Authority: SU
Inventors: Анатолий Александрович Чичугов; Юрий Викторович Скабелкин; Михаил Васильевич Андреев; Марина Александровна Розанова
Priority date: 1979-07-04
Filing date: 1979-07-04
Publication date: 1981-07-07

Description

1one

Изобретение относитс к машиностроению и может быть использовано в энергомашиностроении дл обработки паровых турбин.The invention relates to mechanical engineering and can be used in power engineering for the treatment of steam turbines.

Известно переносное устройство дл расточки , содержащее шпиндель с режуш,им инструментом, установленным в двух подшипниковых опорах, закрепленных при помоши болтов на обрабатываемой детали 1.A portable device for boring is known, which contains a spindle with rezush, a tool installed in two bearing supports fixed with the aid of bolts on the workpiece 1.

Недостатком известного устройства вл етс то, что шпиндель, установленный в двух подшипниковых опорах, нри обработке отверсти будет иметь значительный радиальный прогиб от сил резани , а крепление подшипниковых опор на обрабатываемой детали не позвол ет использовать приспособление в труднодоступных и стесненных местах.A disadvantage of the known device is that the spindle mounted in two bearing supports, when machining the hole, will have significant radial deflection from cutting forces, and mounting the bearing supports on the workpiece does not allow using the tool in hard-to-reach and tight places.

Целью изобретени вл етс упрощение креплени устройства на обрабатываемой детали и повышение качества обработки.The aim of the invention is to simplify the mounting of the device on the workpiece and improve the quality of processing.

Указанна цель достигаетс тем, что устройство снабжено винтом нат -сени , запорным кольцом и упорной планкой, а шпиндель выполнен с продольным пазом дл установки последней и резьбовым отверстием дл установки винта нат жени , причем опоры шпиндел снабжены фрикционными накидками, жестко закрепленными на них.This goal is achieved by the fact that the device is equipped with a screw for the fall, a locking ring and a stop bar, and the spindle is made with a longitudinal groove for the latter and a threaded hole for the tension screw, and the spindle supports are fitted with friction capes fixed on them.

Изобретение по сн етс чертежом.The invention is illustrated in the drawing.

Устройство содержит шпиндель 1 с резцедержателем 2, две подшипниковые опоры 3 с приклеенными к опорным поверхност м фрикционными накладками 4, позвол ющими получить большой коэффициент трени между плоскостью фланца обрабатываемой детали и опорной плоскостью подшипниковых онор. Приводна система 5 служит дл передачи крут щего момента на режущий инструмент. В резьбовое отверстие шпиндел завинчен винт нат жени 6, упирающийс торцем в упорную планку 7 и запорное кольцо 8, прилегающее к обойме упорного подшипника.The device comprises a spindle 1 with a tool holder 2, two bearing supports 3 with friction linings 4 glued to the bearing surfaces, which allow to obtain a large coefficient of friction between the plane of the flange of the workpiece and the bearing plane of the bearing. The drive system 5 serves to transfer torque to the cutting tool. A spindle tightening screw 6 is screwed into the threaded hole of the spindle, butt-abutted against the stop bar 7 and the locking ring 8 adjacent to the thrust bearing race.

Устройство работает следующим образом .The device works as follows.

Устройство ввод т в обрабатываемое отверстие .The device is inserted into the hole to be machined.

Claims

In the longitudinal spindle 1, a stop bar 7 is installed. To create a stress state in the spindle and fasten the tool to the part, the tension screw 6 is screwed to such an extent that the tool is held on the end surface of the flange of the part by applying radial force to the supports equal to 50 kr . The product is processed. After finishing the treatment, the tension screw 6 is unscrewed one to two turns and the stop bar 7 is removed from the longitudinal groove of the spindle 1, which is then withdrawn from the machined hole. Such a device design that creates a stressful state in the spindle reduces the overall weight of the tool, improves the hole machining accuracy by reducing the spindle's radial deflection and allows it to be used when machining holes in large parts, for example, in steam and hydraulic turbines. hard to reach and cramped places. A portable device for boring holes in large parts, containing its drive, a spindle mounted in two sub-anchor supports and a tool holder with a tool, characterized in that, in order to simplify the mounting of the device on the workpiece and improve the quality of processing, the device is equipped with a screw tension, locking ring and thrust plate, and the spindle is made with a longitudinal groove for the installation of the latter and a threaded hole for the installation of the tension screw, and the supports are provided with friction overlays rigidly fixed on them. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 83021, cl. B 23B 41/12, 1948