SU904897A1

SU904897A1 - Damping abutment

Info

Publication number: SU904897A1
Application number: SU802926072A
Authority: SU
Inventors: Юрий Николаевич Кузнецов; Юрий Павлович Дьяченко; Федор Борисович Малев; Алексей Петрович Графчев
Original assignee: Киевский Ордена Ленина Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции
Priority date: 1980-05-20
Filing date: 1980-05-20
Publication date: 1982-02-15

Description

II

Изобретение относитс к металло обработке и может быть использовано в токарных станках.This invention relates to metal working and can be used in lathes.

Известен упор демпфирующий, в полости корпуса которого расположен подвижный шток с упорным подшипником качени L 1 J.Known stop damping, in the cavity of the body of which is located a movable rod with a thrust bearing L 1 J.

Однако при таком исполнении низка точность останова обрабатываемого прутка.However, with such a design, the accuracy of stopping the bar being machined is low.

Целью изобретени вл етс повышение точности .The aim of the invention is to improve the accuracy.

Поставленна цель достигаетс тем, что упор снабжен пружинным клапаном и установленным в полости корпуса поршнем с двум отверсти ми, причем пружинный клапан предназначен дл периодического взаимодействи с одним из отверстий поршн и закреплен на поршне, а полость корпуса заполнена рабочей жидкостью.This goal is achieved by the fact that the stop is provided with a spring valve and a two-hole piston installed in the body cavity, the spring valve being designed to periodically interact with one of the piston holes and fixed to the piston and the body cavity is filled with working fluid.

Такое выполнение повышает точность останова обрабатываемого прутка.This embodiment improves the stopping accuracy of the processed rod.

На чертеже представлен предлагаемый упор, общий вид.The drawing shows the proposed stop, a general view.

Упор демпфирующий состоит из рачага 1, в котором закреплен винтами 2 корпус 3 в ггалости которого установлен упорный подшипник k, поджимаемый к внутренней поверхности пружиной 5. The damping stop consists of a rachaga 1, in which the housing 3 is fixed with screws 2 in the galaxy of which the thrust bearing k is mounted, pressed against the inner surface by a spring 5.

Поршень 6 расположен в корпусе 3 и отжимаетс от подшипника k пружиной 5 посредством шайбы 7 до упора в крышку 8, завинченную в корпус 3Пружинный клапан 9 закреплен на поршне 6 винтом 10, расположен возле отверсти А большого сечени , В поршне 6 также выполнено отверстие малого сечени Б.The piston 6 is located in the housing 3 and is pressed out from the bearing k by the spring 5 by means of a washer 7 up to the stop in the cover 8 screwed into the housing 3 B.

Claims

The pin 11 fixes the relative angular position of the piston 6 and washers 7. The lock nut .12 and washers 13 fix the axial position of the movable rod 1 relative to the piston 6. The rod has a tapered surface, which faces vertically to the bar to be machined. 15. The union 16 is connected to the cavity of the body through a sealing washer 17 3, cavities C and D, formed by the internal cavity of the housing 3, with the outer surface of the piston 6 and the end face of the cover 8, are filled with a working fluid, such as oil. Seals 18 19 and 20 are installed in the cover 8 and the housing 3. The support operates in the following sequence. Under the action of the rod 15, the rod 1 together with the piston 6 moves in the direction of the bearing. At the same time, the pressure in cavity G increases and the fluid flows into cavity C through hole B and the gap between spring valve 9 and piston 6. With increasing pressure in cavity G, this gap decreases, which ensures a boost in pressure in cavity G with increasing piston speed 6. As the kinetic energy of the rod 15 dissipates in the fluid, the speed of the piston 6 decreases and, consequently, the pressure in the cavity H decreases. This causes an increase in the throttle clearance between the spring valve 3 and the piston 6. Thus, p xed reduce resistance to movement of the piston 6 to stop it in the bearing k. At the same time, there is no significant slip of the rod 15 relative to the rod I, since the piston 6 rotates together with the rod 15 and the frictional forces in the bearing C and the matings of the piston 6 with the housing 3 and the cover 8 are insignificant. The presence of a constant abundant lubrication with fluid ensures low wear of the bearing k and the interface between the piston 6 and the housing 3 and the cover 8. The feed of fluid from the hydraulic system of the machine through the fitting 1b compensates for the leakage of fluid. The position of the thrust bearing 4 between the radial bearings of the piston 6 allows maximum utilization of the small axial dimensions of the stop to reduce the radial loads at the possible misalignment positions of the rod 15 and piston 1b during machine operation. It also reduces radial bearing wear. Thus, in this stop, the accuracy of stopping the bar 15 without reducing the technological capabilities 74 of the machine is enhanced by the location of the hydraulic damper inside the lever 1, and the thrust bearing k inside the housing 3B when for some reason, for example, breakage of the cutting tool, the part is not cut off; when the lever 1 is turned into the working position, the rod 1t meets a rod 15 with an axial conical surface. In this case, the rod 1 and the piston 6 are moved in the axial direction until the lever 1 is in a position coaxial with the bar 15. When the bar 15 is subsequently fed, the piston 4 and the rod H are pressed by the housing 3 through the bearing 3 into the lever 1. At the same time the collet slips along the bar 15 or is compressed in, driving the bar feeder (not shown) The length of the bar 15 is not increased and the failure of other tools and fixtures is prevented. Thus, in this stop, the reliability of operation of the bar feed mechanism is increased due to the presence of a conical surface on the movable part of the stop. Emphasis damping designed in relation to multi-spindle automatic lathe mod. , KA-103 and can be used both on multi-spindle and single-spindle automatic lathes, as well as on turret lathes. Technical and economic efficiency in the application of the invention is due to the improved accuracy of the bar stop. Claims of the invention A damping stop, in the cavity of whose casing there is a movable rod with a thrust rolling bearing, characterized in that, in order to improve accuracy, the stop is provided with a spring valve and a two-hole piston installed in the housing cavity, the spring valve being designed to periodically interact with one of the holes of the piston and fixed to the piston, and the cavity of the housing is filled with working fluid. Sources of information taken into account during the examination 1. USSR Author's Certificate No., cl. B 23 B 13/00, 1978.

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