SU917917A1

SU917917A1 - Apparatus for centreless turning

Info

Publication number: SU917917A1
Application number: SU792785553A
Authority: SU
Inventors: Эдгар Евелевич Богорад; Владимир Виленович Генкин; Виктор Яковлевич Гуляев; Валентин Иванович Денисов; Алексей Павлович Зобнин; Анатолий Саулович Кельзон; Борис Федорович Клочков; Георгий Михайлович Крестешников; Юрис Петрович Циманский; Александр Михайлович Щербаков
Original assignee: Ленинградское Высшее Инженерное Морское Училище Им.Адмирала С.О.Макарова; Московское Особое Конструкторское Бюро Металлорежущих Станков
Priority date: 1979-07-06
Filing date: 1979-07-06
Publication date: 1982-04-07

Description

Устройство относитс к области машиностроени и может быть исполь- , зовано, в бесцентрово-токарных станках , например, дл обработки прутковых материалов.The device relates to the field of mechanical engineering and can be used in centrifugal lathes, for example, for machining rod materials.

Известно устройство дл бесцентрово-токарной обработки, например, прутковых материалов, содержаицее втулку,установленную с возможностью осевого перемещени на приводном полом шпинделе, несущем на переднем конце резцы, взаимодействующие с конической поверхностью втулки при ее осевом перемещении, и смонтирЬванный внутри шпиндел полый стержень с удерживающими заготовку роликами 13 .A device is known for centerless turning, for example, rod materials, containing a sleeve mounted for axial movement on a driving hollow spindle carrying cutters interacting with the conical surface of the sleeve when it is axially moved, and a hollow rod mounted inside the spindle with retaining billet rollers 13.

Така конструкци устройства не позвол ет устранить действие вибраций полого вала на радиальное поло ение резцов даже за счет наличи азора между регулируемой втулкой и полым валом-шпинделем, так как колебани полого вала-шпиндел ,возникающие от его динамической неуравновешенности , (значительной из-за его большой длины, определ емой расположением ведомого шкива между опорами), передаютс через резщл и регулируемую втулку на подшипниковый узел механиз-Such a device design does not allow to eliminate the effect of the vibrations of the hollow shaft on the radial position of the incisors even due to the presence of azor between the adjustable sleeve and the hollow shaft-spindle, since the oscillations of the hollow shaft-spindle arising from its dynamic imbalance (significant because of its large length, determined by the location of the driven pulley between the supports), are transmitted through the cutting wheel and the adjustable sleeve to the bearing assembly

ма осевого перемещени регулируемой втулки, увеличива испытываемые им радиальные усили , особенно когда направление радиального перемещени резцов не совпадает с направлением действи силы или плоскости момента, вызывающими колебани полого валашпиндел . Использование в качестве привода зубчатого ремн позвол ет the axial movement of the adjustable sleeve increases the radial forces experienced by it, especially when the direction of the radial movement of the cutters does not coincide with the direction of the force or the plane of the moment causing oscillations of the hollow shaft spindle. The use of a gear belt as a drive allows

10 снизить его статический нат г. Однако необходимость передачи большого крут щего момента, обеспечивающего достаточное усилие резани , требует большого динамического нат жени 10 to reduce its static tension. However, the need to transfer a large torque that provides sufficient cutting force requires a large dynamic tension.

15 ведуй1ей ветви ремн , котора обладает инерционностью и порождает дополнительные вибрации между обрабатыBaeNBJM изделием и резцами.15 of the leading branch of the belt, which is inert and generates additional vibrations between the product and the cutters of the BaNBJM product.

Целью изобретени вл етс повы20 шение чистоты и точности обработки за счет исключени вли ни силы нат жени приводного ремн на вибрацию полого шпиндел .The aim of the invention is to improve the purity and precision of processing by eliminating the effect of the tension of the driving belt on the vibration of the hollow spindle.

Эта цель достигаетс тем, что ве25 домый шкив привода шпиндел установлен на подшипниках в корпусе устройства и взаимодействует с хвостовой частью шпиндел посредством синхронно вращающейс со шкивом радиальной This goal is achieved by the fact that the powerful spindle drive pulley is mounted on bearings in the device case and interacts with the tail part of the spindle by means of a radially rotating synchronous pulley

Claims

30 is an elastic support, and the front end of the spindle is mounted in the device case on a non-rotating elastic support. The drawing shows the device in longitudinal section. The device is designed as a hollow spindle 2 disposed in the housing 1, supported by the front end through the bearing 3 on a non-rotating elastic support 4. The tail part of the spindle 2 rests on a non-rotating support 5. The support 5 is mounted on the driven pulley 6 of the spindle 2 and made synchronously rotating with it for transmitting torque to the spindle 2. A pulley is mounted on bearings 7 supported on sleeve 8, rigidly connected by flange 9 with body 1 At the front end of spindle 2, cutters 10 are interchangeably connected Acting with the inner conical surface of the adjustable sleeve IG mounted on the spindle 2 with a guaranteed gap, ensuring its relative axial movement after its absence of rotation relative to the spindle 2. Sleeve 11, through the bearing assembly 12 and two bushes 13, 14 fixed rigidly relative to each other in the axial direction and with a gap in the radial direction, interacts with the worm with a wheel 15 of the axial movement mechanism by the nocpf threaded joint. The sleeve 14 has a finger 16 which enters the opening 17 of the housing 1 and during rotation of the worm gear 15 allows only axial movement of the sleeve 14 and, consequently, the sleeve 13. Inside the spindle 2 there is a hollow rod 18 with retaining product 19 rollers 20. Floors the rod 18 of the consoles is reinforced by the tail part by means of the flange 21 on the housing 1. The device operates as follows. The spindle 2, driven by the driven pulley b and the elastic support 5, rotates with the cutters 10 around the workpiece 19 held by the rollers 20. In this case, the spindle 2, the bearing 3, the cutters 10, the adjustable sleeve 11, the bearing unit 12, the sleeve 13 due to the non-rotating elastic support 4 and rotating elastic support 5 are a single oscillatory system in which the radial static and dynamic forces from the belt are perceived directly by the housing 1 through the bearing 7 and the sleeve 8 without affecting the spindle

2. To shift the cutters 10 in the radial direction as a result of their partial wear, a worm is connected to an axial displacement device, which, acting on the worm gear 15, through the screw transmission, displaces the sleeve 14 in axial direction, and the adjustable sleeve 11, which the inner conical surface acts on the cutters 10, shifting them to the center. Apparatus of the invention for centerless turning, for example, rod materials, comprising a sleeve installed with the possibility of axial movement on a driving hollow spindle carrying cutters interacting with the conical surface of the sleeve at the front end, and mounted inside the spindle hollow rod with 6 "1 rollers" that differs in that, in order to increase the purity and accuracy of processing by eliminating the influence of the tension of the driving belt on the vibration of the spindle, the driven pulley of the spindle drive is It is mounted on bearings in the device case and interacts with the tail end of the spindle by means of a radial elastic support synchronously rotating with the pulley, and the front end of the spindle is mounted in the case on a non-rotating elastic support. Sources of information taken into account during the examination 1. Patent CCCPW 374795, cl. B 23. B 29/04, 1973 (prototype).

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