SU806290A1

SU806290A1 - Apparatus for continuous working of cams

Info

Publication number: SU806290A1
Application number: SU792771381A
Authority: SU
Inventors: Владимир Тимофеевич Затоненко
Original assignee: Войсковая Часть 44388-Р/П
Priority date: 1979-05-25
Filing date: 1979-05-25
Publication date: 1981-02-23

Description

Изобретение относится к станкостроению и может быть использовано для обработки полного профиля преимущественно диаметральных кулачков. _The invention relates to machine tool industry and can be used to process a complete profile of mainly diametrical cams. _

Известно устройство для обработки кулачков с размещенной на станине с возможностью поступательного перемещения от задающего кривошипа кареткой и установленным на ней поворотным столом для детали, кинематически связанным с кривошипом [1] .A device for processing cams with placed on the frame with the possibility of translational movement from the master crank carriage and mounted on it with a rotary table for the part kinematically connected with the crank [1].

Известные устройства позволяют по* лучать кулачки с симметричным профилем. При ревёрсе кулачка закон перемещения толкателя не изменяется. 15 Таким образом, толкатель при разбеге и выбеге перемешается по одному закону.Known devices make it possible to obtain cams with a symmetrical profile. When the cam is reversed, the law of movement of the pusher does not change. 15 Thus, the pusher during the take-off and run-up shifts according to one law.

Цель изобретения - обработка асим- 20 метричных профилей кулачков.The purpose of the invention is the processing of asymmetric 20 metric cam profiles.

Указанная цель достигается, тем, что устройство снабжено коромыслом, одним концом шарнирно связанным с задающим кривошипом, другим - со ста- 25 НИНОЙ.This goal is achieved, in that the device is equipped with a beam, one end pivotally connected to the master crank, the other with a steel 25.

На чертеже представлена схема устройства.The drawing shows a diagram of the device.

Устройство содержит станину 1, в направляющих которой установлена' ка- 30 ретка 2. На каретке размещены задающий кривошип 3 и поворотный стол 4, а также кинематически связывающий их редуктор 5. Задающий кривошип шарнирно соединен с коромыслом 6, которое также шарнирно соединено со станиной. На поворотном столе устанавливают заготовку 7, с которой взаимодействует рабочий орган 8. Прямая, соединяющая центры вращения поворотного стола и рабочего органа, параллельна направлению перемещения каретки.The device comprises a frame 1, in the guides of which there is a 'carriage 2. The driving crank 3 and the rotary table 4 are placed on the carriage, as well as the gearbox 5 kinematically connecting them. The master crank is pivotally connected to the beam 6, which is also pivotally connected to the bed. A workpiece 7 is installed on the rotary table, with which the working body 8 interacts. A straight line connecting the centers of rotation of the rotary table and the working body is parallel to the direction of movement of the carriage.

При вращении задающего кривошипа 3 получает вращение связанный с ним через редуктор 5 поворотный у стол 4 Одновременно вращение задающего кривошипа преобразуется в колебательное движение коромысла 6 и, посредством этого коромысла, в возвратно-поступательное движение каретки 2 с поворотным столом 4.When the master crank 3 rotates, it rotates at the table 4 connected with it through the gearbox 5. At the same time, the rotation of the master crank is converted into the oscillatory movement of the rocker arm 6 and, through this rocker arm, into the reciprocating movement of the carriage 2 with the rotary table 4.

Таким образом, стол 4 получает переносное возвратно-поступательное движение вместе с кареткой и относительное вращательное движение относительно каретки. При этом рабочий орган 8 будет обрабатывать профиль кулачка на заготовке 7, установленной на поворотном столе 4.Thus, the table 4 receives a portable reciprocating motion together with the carriage and the relative rotational movement relative to the carriage. In this case, the working body 8 will process the cam profile on the workpiece 7 mounted on the turntable 4.

Величина амплитуды колебания каретки и хода обрабатываемого кулачка устанавливается изменением длины задающего кривошипа и коромысла.The amplitude of the oscillation of the carriage and the stroke of the processed cam is set by changing the length of the master crank and rocker.

Если передаточное отношение редуктора между задающим кривошипом , и поворотным столом булет равно 1=1/п , (где ή - почетное число, то кулачок будет обладать свойством диаметральрости. JIf the gear ratio between the master crank and the turntable the bulet is 1 = 1 / n, (where ή is the honorary number, then the cam will have the property of diametrality. J

При это обрабатываемый профиль кулачка является асимметричным, так как уравнение профиля, выраженное через безразмерные коэффициенты пути толкателя кулачкового механизма, имеет следующий вид для прямого и обратного хода ^^5<η%Ό1 .In this case, the processed cam profile is asymmetric, since the profile equation expressed in terms of the dimensionless path coefficients of the cam follower has the following form for the forward and reverse stroke ^ ^{5 <η%} Ό1.

где Х=а/в, а- длина задающего кривошипа; в- длина коромысла; угол поворота задающего кривошипа.where X = a / b, a is the length of the master crank; in - the length of the rocker; angle of rotation of the master crank.

Предлагаемое устройство позволяет производить непрерывную обработку диаметральных кулачков, профиль которых является асимметричным. При этом величина асимметричности профиля зависит от соотношения длин задающего кривошипа и коромысла и может меняться в достаточно широких пределах.The proposed device allows for continuous processing of diametrical cams, the profile of which is asymmetric. In this case, the asymmetry of the profile depends on the ratio of the lengths of the master crank and rocker and can vary within wide enough limits.

Claims

The invention relates to a machine tool industry and can be used to process a full profile of predominantly diametrical cams. A device for treating cams with a carriage placed on a frame with a possibility of translational movement from a master crank and a rotary table mounted on it for a part kinematically connected with a UJ crank is known. Known devices make it possible to produce cams with a symmetrical profile. When the cam reverses, the law of movement of the pusher does not change. Thus, the pusher during run-up and coast-down will be mixed according to one law. The purpose of the invention is the processing of cam asim matrix profiles. This goal is achieved by the fact that the device is equipped with a beam, one end of which is pivotally connected to the giving crank, and the other to the frame. The drawing shows a device diagram. The device contains a frame 1, in the guides of which a carriage is installed

2. On the carriage there is a master crank 3 and a rotary table 4, as well as a gearbox kinematically linking them 5. The master crank is pivotally connected to the beam 6, which is also pivotally connected to the frame. On the rotary table, a workpiece 7 is installed with which the working member 8 interacts. A straight line connecting the centers of rotation of the turntable and the working member is parallel to the direction of movement of the carriage. When the crank 3 rotates, the crank 3 gets the rotation associated with it through the gear 5 rotary table 4. At the same time, the rotation of the driver crank is converted into oscillatory motion of the rocker arm-6 and, through this rocker arm, in the reciprocating motion of the carriage 2 with the rotary table 4. Thus, table 4 receives a portable reciprocating motion with the carriage and relative rotational motion relative to the carriage. In this case, the working body 8 will process the cam profile on the workpiece 7 mounted on the turntable 4. The magnitude of the oscillation of the carriage and the stroke of the processed cam is determined by changing the length of the setting crank and the rocker arm. If the gear ratio between the setting crank and the rotary table is equal to (where ri is an honorary number, then the cam will have the property of diametrality. J For this, the cam profile being processed is asymmetric, because the profile equation expressed through the dimensionless coefficients of the cam path mechanism, has the following form for the forward and reverse stroke -f i-cos y (. -y, -. () T -Vi sin f -V) where, a is the length of the setting crank; b is the length of the rocker arm} angle of rotation crank set. The proposed device pos It is necessary to produce continuous processing of diametrical cams, whose profile is asymmetrical. At the same time, the value of asymmetry of the profile depends on the ratio of the length of the setting crank and rocker arm and can vary within fairly wide limits.The invention Apparatus for continuous processing of cams placed on the frame with the possibility of translational movement from the driving crank of the carriage and the rotary table mounted on it for a part that is kinematically associated with a crank, characterized by o, in order to process asymmetrical cam profiles, the device is equipped with a rocker arm, one end pivotally connected to the setting crank, and the other with a frame. ; Sources of information taken into account during the examination 1. Artobolevsky I.I. Mechanisms in modern technology, tz M., Science, 1973, p.238.