SU740525A1

SU740525A1 - Press

Info

Publication number: SU740525A1
Application number: SU782579033A
Authority: SU
Inventors: Игорь Анатольевич Базунов; Альберт Сергеевич Езжев
Original assignee: Московское Ордена Ленина И Ордена Трудового Красного Знамени Высшее Техническое Училище Им. Н.Э.Баумана
Priority date: 1978-02-14
Filing date: 1978-02-14
Publication date: 1980-06-15

Description

Изобретение относится к области ма(шиностроения, а именно к конструкциям прессов. .The invention relates to the field of mechanical engineering (tire engineering, namely to press structures.

Известен пресс, содержащий станину,ползун с направляющими стойками, соединенный ветвями гибкого силового элемента с намоточными барабанами, а также привод. В известном прессе рабочий ход ползуна осуществляется при намотке гибкого элемента на барабаны, а возвратный ход - при подаче жидкости в гидравли- ¹ческие цилиндры [1].A known press comprising a bed, a slider with guide racks, connected by branches of a flexible power element with winding drums, as well as a drive. In a press working stroke of the slider is carried out by winding the flexible element onto the drum, and a return stroke - when applying fluid in the hydraulic cylinders ¹ cal [1].

Недостатком известного пресса является низкая производительность, обусловленная тем, что скорость ползуна при ходе вниз ограничена допустимой скоростью намотки гибкого элемента на барабан. /A disadvantage of the known press is low productivity, due to the fact that the speed of the slide during the downward stroke is limited by the permissible speed of winding the flexible element on the drum. /

Цель изобретения - повышение производительности и надежности в работе. Указанная цель достигается за счет того, что пресс снабжен распределительным валом с кулачками рабочего и возвратного хода, толкателями и двуплечими рычага2 ми, при этом распределительный вал соединен с приводом, каждый из двухплечих рычагов установлен с возможностью взаимодействия одним концом с направляющими стойками ползуна и другим - с кулачками возвратного хода, а толкатели размещены между кулачком рабочего хода и ветвями гибкого силового элемента.The purpose of the invention is to increase productivity and reliability. This goal is achieved due to the fact that the press is equipped with a camshaft with operating and returning cams, pushers and two-arm levers 2, while the camshaft is connected to the drive, each of the two-arm levers is installed with the possibility of interaction with one end with the slide racks and the other - with cams of the return stroke, and pushers are placed between the cam of the stroke and the branches of the flexible power element.

На фиг. 1 показан пресс, общий вид; на фиг. 2 - разрез А-А фиг. 1; на фиг. 3 - регулируемые упоры; на фиг.4 схема привода распределительного вала; на фиг. 5 - схема действия усилий в прессе.In FIG. 1 shows a press, a general view; in FIG. 2 is a section AA of FIG. one; in FIG. 3 - adjustable stops; figure 4 diagram of the camshaft drive; in FIG. 5 is a diagram of the action of efforts in the press.

Пресс содержит станину 1, во втулках 2 которой установлен ползун 3 с направляющими стойками 4. Ползун 3 и станину 1 схватывает по полиспастной схеме гибкий силовой элемент 5 (например, высокопрочная стальная лента), уложенный на направляющие ролики 6. Концы гибкого силового элемента 6 закреплены на барабане 7 намоточного устройства. В станине 1 установлен рас, пределительный вал 8, кинематически соединенный передачей .9' с приводом 10. На валу установлены кулачок 11 рабочего хода и кулачки 12 возвратного хода. Кулачок 11 взаимодействует с двумя толкателями Ϊ3, на концах которых смонтированы стержни 14, упирающиеся в ветви- гибкого силового элемента 5. Кулачки 12 взаимодействуют с установленными на станине 1 двуплечими рычагамиThe press contains a bed 1, in the sleeves 2 of which a slider 3 with guide racks 4 is installed. The slider 3 and the bed 1 are gripped by a flexible power element 5 (for example, high-strength steel tape) laid on guide rollers 6. The ends of the flexible power element 6 are fixed on the drum 7 of the winding device. In the frame 1, a race, a camshaft 8, kinematically connected by a .9 'gear with a drive 10 is installed. A cam 11 of the stroke and cam 12 of the return stroke are mounted on the shaft. The cam 11 interacts with two pushers Ϊ3, at the ends of which rods 14 are mounted, abutting against the branches of the flexible power element 5. The cams 12 interact with the two-arm levers mounted on the frame 1

15, плечо которых опирается на стойке 4. Для регулировки длины стоек 4 предусмотрены регулировочный винт 16 и контргайка 17.15, the shoulder of which rests on the post 4. To adjust the length of the uprights 4, an adjustment screw 16 and a lock nut 17 are provided.

Пресс работает следующим образом. В исходном положении ползун 3 находится в крайнем верхнем положении, а барабан 7 намоточного устройства застопорен. При включении привода 10 вал 8 вместе с кулачками 11 и 12 начинает вращаться. При этом освобождаются двуплечие рычаги 15, что дает возможность ползуну 3 опускаться. В то же время кулачок 11- своим выступающим профилем набегает на толкатели 13 и выдвигает- их вместе с стержнями 14, которые оттягивают ветви гибкого силового элемента 5 в стороны. В результате ползун 3 опускается и осуществляется рабочий ход. При дальнейшем повороте вала 8 освобождаются толкатели 13, а выступающий профиль кулачков 12 набегает на рычаги .15 и поворачивает их, в результате чего поднимаются стойки 4 с ползуном 3.Press works as follows. In the initial position, the slider 3 is in its highest position, and the drum 7 of the winding device is locked. When you turn on the drive 10, the shaft 8 together with the cams 11 and 12 begins to rotate. In this case, two-arm levers 15 are released, which allows the slider 3 to fall. At the same time, the cam 11, with its protruding profile, runs onto the pushers 13 and extends them together with the rods 14, which pull the branches of the flexible power element 5 to the sides. As a result, the slider 3 is lowered and a stroke is carried out. With a further rotation of the shaft 8, the pushers 13 are released, and the protruding profile of the cams 12 runs onto the levers .15 and rotates them, as a result of which the racks 4 with the slider 3 rise.

При такой конструкции усилие пресса составляет Р=2М где где yiviH отклонения ветвей гибкого силового элемента От вертикали;With this design, the press force is P = 2M where where yiviH are the deviations of the branches of the flexible power element from the vertical;

И - крутящий момент на валу кулачкового механизма;And - torque on the cam shaft;

ω - угловая скорость вала кулачкового механизма;ω is the angular velocity of the cam shaft;

V - скорость толкателя;V is the speed of the pusher;

- КПД кулачкового механизма.- The efficiency of the cam mechanism.

ползуна описывается выражениемthe slider is described by the expression

М=Р. - S (сЦтоЫ+ ctg-cA₂y+ &?.'M = P. - S (STSTO + ctg-cA ₂ y + & ?. '

ФорFore

- длина ветви гибкого силового элемента;- the length of the branches of the flexible power element;

- ход толкателя;- stroke of the pusher;

- упругая гибкого деформация ветви силового элемента.- elastic flexible deformation of the branch of the power element.

Claims

(54) PRESS The invention relates to the field of mace (tire construction, namely, the design of presses.) A press is known that contains a staple, a toller with guide racks, connected by branches of a flexible power element with winding drums, as well as a drive. In a known press The working stroke of the slider is carried out when the flexible element is wound on the drums, and the return stroke is carried out when the fluid is fed into the hydraulic cylinders l. A disadvantage of the known press is the low productivity due to the fact that the speed of the slider during the down stroke is limited The objective of the invention is to increase productivity and reliability in operation. This goal is achieved due to the fact that the press is equipped with a camshaft from the cam and the working and return stroke, pushers and two shoulders of the camshaft, while the camshaft connected to the drive, each of the two shoulders levers is mounted with the ability to interact at one end with the slider posts and the other with the return stroke cams, and the pushers are placed between the cam Static preparation stroke and legs of the flexible circuit member. FIG. D shows the press, a general view; in fig. 2 - section A-A of FIG. one; in fig. 3 - adjustable stops; 4 shows a camshaft drive circuit; in fig. 5 - scheme of action efforts in the press. The press contains a bed 1, in sleeves 2 of which a slider 3 with guide posts 4 is installed. Slider 3 and stanza 1 covers a flexible power element 5 (for example, high-strength steel tape) laid on the guide rollers 6 on a polyspatch circuit. The ends of the flexible the power element 6 is fixed on the drum 7 winding 1 x 3 ustruystva. In frame 1, a pac distributor shaft 8, kineglatically connecting pfechachey 9 with a drive U is installed. power element 5. The cam blade 12 interacts with two shoulder arms 15 mounted on cTAHKiie 1, the shoulder of which rests on a stand. An adjustment screw 16 and a lock nut 17 are provided for adjusting the length of the uprights 4 and the press nut 17. The press works as follows. In the initial position, the slider 3 finds with in the extreme upper position, and the drum 7 winding devices is locked. When the drive 10 is turned on, the shaft 8, together with the cams 11 and 12, begins to rotate. At the same time, the two arms 15 are released, which allows the slide 3 to be lowered. At the same time, the cam 11, with its vortex profile, runs onto the pushers 13 and pushes them together with the rods 14, which pull the branches of the flexible power element 5 to the side. As a result, slider 3 is lowered and a working stroke is made. Upon further rotation of the shaft 8, the pushers 13 are released, and the protruding profile of the cams 12 rails on the levers 15 and turns them, resulting in a steady 4 with a slider 3. With this design, the press force is v (ctgc.4-ctg., Where cA .HdL- deflection angles of the branches 1 1 of the flexible power element From the vertical; 5 M - torque on the shaft of the cam mechanism; Lu - angular speed of the cam shaft; V - speed of the pusher; P - efficiency of the cam mechanism. - S (ctgot 4 clg-a Y, where is the length of the branch of flexible forces New element; S - pusher stroke; d & elastic deformation of a branch of a flexible power element. Invention A press containing a frame, a slider with guide posts, connected by branches of a flexible power element with winding drums, as well as a drive characterized in that in order to increase productivity and reliability in operation, it is equipped with a camshaft mounted on the frame with working and return cams, pushers and two-arm levers, while the camshaft is connected to the drive, each of the two shoulders, the levers are arranged to interact with one arm with the rails of the ram, and the other with the return stroke cams, and the pushers are placed between the working cam and the branches of the flexible power element. Sources of information taken into account in the examination, 1. USSR Author's Certificate No. 277548, cl. B 30 B 1 / GS, 1970.