SU469616A1

SU469616A1 - Core to tyre fastening devices

Info

Publication number: SU469616A1
Application number: SU741985195A
Authority: SU
Inventors: В.В. Беляевский; В.Я. Море; А.В. Корчагин
Original assignee: Всесоюзный Научно-Исследовательский И Конструкторский Институт По Оборудованию Для Шинной Промышленности
Priority date: 1974-01-11
Filing date: 1974-01-11
Publication date: 1979-02-15

Description

II

Изобретение относитс к оборудованию дл шинной и шиноремонтной промышленности и предназначаетс дл креплени покрышек при обработке их на шероховальных станках.The invention relates to equipment for the tire and tire repair industry, and is intended to be used to fasten tires when they are machined on roughing machines.

Известен дорн к устройствам дл креплени покрышек, содержащий оправку со смонтированными на ней посредством осей свободно вращающимис опорными элементами . Во врем обработки покрышки дорн поджат к внутреннему ее профилю с усилием , обеспечивающим взаимный контакт его с покрышкой, и вращаетс в том же направлении, что и покрышка. При этом режущий инструмент вращаетс вокруг своей оси, обход обрабатываемый профиль покрышки под действием усили подачи. Под действием силы резани и усили подачи происходит сдвиг и разворот продольных и поперечных осей профил покрышки. Возникающа сила трени между внутренним профилем покрышки и дорном оказываетс недостаточной по сравнению с силой резани и усилием подачи. В результате наружной обработанный профиль покрышки оказываетс смещенным и развернутым относительно ее собственных осей, а толщинаA mandrel for devices for fastening tires is known, comprising a mandrel with freely rotating support elements mounted on it by means of axles. During the processing of the tire, the mandrel is pressed against its internal profile with a force that ensures its mutual contact with the tire, and rotates in the same direction as the tire. In this case, the cutting tool rotates around its axis, bypassing the processed profile of the tire under the action of feed forces. Under the action of cutting force and feed force, the longitudinal and transverse axes of the tire profile shift and pivot. The resulting frictional force between the inner profile of the tire and the mandrel is insufficient compared with the cutting force and the feed force. As a result, the outer treated profile of the tire is displaced and unrolled relative to its own axes, and the thickness

обработанного каркаса оказываетс неравно симметричной.the treated frame is unevenly symmetric.

Известный дорн не может обеспечить требуемый угол обработки покрышки по профилю а 160°.Known mandrel can not provide the required processing angle of the tire on the profile and 160 °.

Цель изобретени - самоцентрирование обрабатываемых покрынюк и обеспечение максимального угла их обработки.The purpose of the invention is the self-centering of the machined blades and ensuring the maximum angle of their processing.

Это достигаетс за счет того, что опорные элементы выполнены в виде сферических роликов, расположенных своими продольными ос ми по периметру внутреннего профил поперечного сечени покрышки.This is achieved due to the fact that the supporting elements are made in the form of spherical rollers arranged with their longitudinal axes around the perimeter of the inner cross-section profile of the tire.

На фиг. 1 изображен предлагаемый дорн; на фиг. 2 - разрез А-А фиг. I; на фиг. 3 - вариант креплени сферических роликов к вилке оправки.FIG. 1 shows the proposed mandrel; in fig. 2 - section A-A of FIG. I; in fig. 3 shows a variant for fastening spherical rollers to a mandrel fork.

Claims

The mandrel contains a fork-type mandrel 1 mounted in a known manner on the holder of the tire mounting device (not shown). On the forks 2 of the mandrel 1 .in a certain p. Orientation, it is rigidly fixed; the supporting axes 3, which are symmetrically located on both sides of it, are mounted (see Fig. 2), on which they are mounted. spherical rollers 4 corresponding to them. The outer surfaces of the rollers are mated with corresponding sections of the inner profile of the tire 5. The spherical rollers 4 are mounted on the axis x 3 with the possibility of free rotation by means of sleeves 6 made of self-lubricating material, for example metal graphite. From the axial movement of the rollers 4 fixed thrust washers 7 and screws 8. In the aggregate, a set of spherical rollers mounted van on a discontinuous broken line, which corresponds to the internal profile of the fixed tire 5. The invention provides for the option of fastening spherical rollers to the mandrel (see. Fig. 3). Dorn contains mandrel 9, also BILONNEL type. On the central fork 10 of the mandrel on either side of it, axes P are fitted with rollers 12, on the side forks 13 of the mandrel 9 on axle 11 there are mounted spherical rollers 14 and 12. Dorn works as follows. The tire 5 to be machined is mounted on the tire face fixer. Dorn freely enters its inter-breasted backlash of tire 5 with its straight-through diametre, and, forcibly unfolding at the backrest, is oriented along its internal profile. The tire 5 is rotatable and rotated with a roughing tool (not shown). The spherical rollers 4, in contact with the inner profile of the tire 5, are also rotated to ensure a stable alignment of the profile of the tire relative to the profile of the mandrel at the time of its processing. Dorn's claim to tire-tying devices, comprising a mandrel with freely rotated supporting elements mounted on it by means of axles, characterized in that, in order to self-center the tires being processed and to ensure the maximum angle of their processing, the supporting elements are in the form of spherical rollers arranged with their own longitudinal axes along the perimeter of the inner cross-section profile of the tire.

. Z

13