SU994084A2

SU994084A2 - Die for two-run drawing

Info

Publication number: SU994084A2
Application number: SU813336108A
Authority: SU
Inventors: Дмитрий Николаевич Корнеев
Original assignee: Предприятие П/Я А-3813
Priority date: 1981-09-08
Filing date: 1981-09-08
Publication date: 1983-02-07

Description

Изобретение относится к холодной штамповке, может быть использовано ’ преимущественно для глубокой вытяжки.The invention relates to cold stamping, can be used ’mainly for deep drawing.

Наиболее близок к предлагаемому штамп для двухпереходной вытяжки, известный из основного авт. св. № 825236, содержащий расположенную в верхней части штампа пуансон-матрицу и размещенные в нижней части матрицу первого перехода, полый корпус, размещенный внутри матрицы первого перехода и связанный с выталкивающим устройством пресса, пуансон второго перехода и концентрично с ним размещенный кольцевой прижим, установленный между матрицей первого перехо да и пуансоном второго перехода и связанный с приводом его перемещения находящимся в полости корпуса; при этом привод перемещения кольцевого прижима выполнен в виде эластичного буфера и пружины, размещенной с наружной стороны корпуса, а пуансон второго перехода размещен на эластичном буфере с возможностью совместно-, го с ним перемещения относительно ..' кольцевого прижима в осевом направлении под действием верхней части штам⁵ па [1 3·Closest to the proposed stamp for a double junction hood, known from the main author. St. No. 825236, containing the punch matrix located at the top of the die and the first transition matrix located at the bottom, a hollow body located inside the first transition matrix and connected to the press ejector device, the second transition punch and an annular clamp placed concentrically with it, installed between the matrix the first transition and the punch of the second transition and associated with the drive of its movement located in the body cavity; the drive of movement of the ring clamp is made in the form of an elastic buffer and a spring located on the outside of the housing, and the punch of the second transition is placed on the elastic buffer with the possibility of joint, relative movement with it .. 'ring clamp in the axial direction under the action of the upper part strain ⁵ PA [1 3 ·

Недостаток этого штампа заключается в том, что при увеличении габаритов штампуемых деталей и относи1₀ тельно высоких коэффициентах вытяжки, т.е. при сравнительно небольшой разнице диаметров первый и второй вытяжки резко уменьшается выталкивающая сила, возвращающая кольцевой при_1S жим в исходное положение. Кольцевой прижим может занять неопределенное промежуточное положение, и деталь не вытолкнется на зеркало штампа.A disadvantage of this die is that by increasing the size and stamped parts otnosi1 ₀ Tel'nykh high draw ratio, i.e. with a relatively small difference in diameters of the first and second hoods, the buoyancy force sharply decreases, which returns the ring press at _1S to its original position. The ring clamp may occupy an indefinite intermediate position, and the part will not be pushed onto the stamp mirror.

Целью изобретения является повыше20 ние надежности штампа’. С этой целью в штампе для двухпереходной вытяжки, известном по авт. св. № 825236, кольцевой прижим выполнен с фланцем по боковой поверхности, а штамп снабжен пружиной, расположенной между фланцем кольцевого прижима и полым корпусом..The aim of the invention is to increase the reliability of the stamp ’. To this end, in the stamp for a two-junction hood, known by ed. St. No. 825236, the annular clamp is made with a flange on the side surface, and the stamp is equipped with a spring located between the flange of the annular clamp and the hollow body ..

На чертеже показан штамп: слева в момент кон^а первого перехода, справа - в конце второго перехода.The drawing shows a stamp: on the left at the moment of the end of the first transition, on the right - at the end of the second transition.

Штамп содержит пуансон-матрицу 1, прижим 2, матрицу первого перехода 3, внутри которой находится кольцевой прижим 4 с фланцем на боковой поверхности и соосно с ним пуансон второго перехода 5, опирающийся на эластичный буфер 6, помещенный в полый корпус 7, укрепленный болтом 8 И пружиной 9. Между фланцем кольцевого прижима 4 и корпусом 7 помещены пружины сжатия 10. На корпус 7 воздействует траверса 11 выталкивателя пресса. В шамп помещена заготовка 1 2 .The stamp contains the punch-matrix 1, clamp 2, the matrix of the first transition 3, inside which there is an annular clamp 4 with a flange on the side surface and coaxially with the punch of the second transition 5, supported by an elastic buffer 6, placed in a hollow body 7, bolted 8 And the spring 9. Between the flange of the annular clamp 4 and the housing 7 are placed compression springs 10. The housing 7 is affected by a beam 11 of the press ejector. The preform 1 2 was placed in the shampoo.

Штамп работает следующим образом.The stamp works as follows.

При ходе ползуна пресса вниз пуансон-матриЦа 1 с помощью прижима 2 производит вытяжку первого перехода через матрицу 3· При дальнейшем хо..де ползуна вниз пуансон-матрица через заготовку 12 воздействует на кольцевой прижим 4’, утапливая его вниз. Прижим своей конической поверхностью обжимает эластичный буфер 6 на меньший диаметр. Под воздействием буфера пуансон второго перехода 5 движется вверх навстречу пуансон-матрице 1 производит вытяжку второго перехода. При этом сжимаются пружины и 10. При ходе ползуна вверх эластичный буфер 6 под действием пружины 9 и в силу собственной упругости· принимает первоначальную форму. Прижим 4 за счет выталкивающей силы упругости буфера 6 под действием пружин движется вверх, занимая первоначальное положение относительно буфера. Пуансон 5 при этом также занимает первоначальное положение. При ;дальнейшем ходе ползуна пресса вверх траверса 11 выталкивателя выталкивает полый корпус 7 с буфером 6 пуансоном 5 и кольцевым прижимом 4, на котором находится отштампованная деталь, на зеркало штампа.When the press slider moves down, the punch-matrix 1 with the help of clamp 2 draws the first transition through the matrix 3 · Then, the slide punch-down matrix works through the blank 12 on the ring clamp 4 ’, recessing it down. The clamp with its conical surface compresses the elastic buffer 6 to a smaller diameter. Under the influence of the buffer, the punch of the second transition 5 moves upward towards the punch-matrix 1 produces the extraction of the second transition. In this case, the springs and 10 are compressed. When the slider moves upward, the elastic buffer 6 under the action of the spring 9 and, due to its own elasticity, takes its original shape. The clamp 4 due to the buoyancy force of elasticity of the buffer 6 under the action of the springs moves upward, occupying the initial position relative to the buffer. The punch 5 also occupies its original position. In the further course of the press slider, the pusher traverse 11 pushes the hollow body 7 with the buffer 6, the punch 5 and the ring clamp 4, on which the stamped part is located, onto the stamp mirror.

Выталкивающая сила, возвращающая прижим 4 в исходное положение, зависит от упругих свойств эластичного буфера, а также от размеров D и d и от усилий пружин 9 и 10. В тех случаях, когда усилия прижима невелики и разница между диаметрами D и d незначительна, возврат кольцевого прижима в исходное положение происходит преимущественно за счет усилия пружин 9 и 10, которые должны лишь преодолеть силы трения между эластичным буфером и кольцевым прижимом 4.The buoyancy force returning the clamp 4 to its original position depends on the elastic properties of the elastic buffer, as well as on the sizes D and d and on the forces of the springs 9 and 10. In cases where the clamping forces are small and the difference between the diameters D and d is insignificant, return ring clamp to the initial position occurs mainly due to the efforts of the springs 9 and 10, which should only overcome the frictional forces between the elastic buffer and the ring clamp 4.

Экономический эффект от использования данного штампа выражается в повышении надежности его работы при любых.условиях штамповки, что особенно важно в условиях массового производства, например посуды, когда ненадежная работа штампа при небольших усилиях прижима может привести к простоям оборудования или даже полному отказу от совмещения операций для некоторых вытяжек.The economic effect of using this stamp is expressed in increasing the reliability of its operation under any stamping conditions, which is especially important in mass production conditions, for example, utensils, when unreliable stamp operation with small pressing forces can lead to equipment downtime or even a complete refusal to combine operations for some hoods.

Claims

The invention relates to cold forming, can be used mainly for deep drawing. Closest to the proposed stamp for two-pass stretching, known from the main ed. St. No. 825236, containing a punch-matrix cus located in the upper part of the punch and a matrix of the first transition located at the bottom, a hollow body placed inside the matrix of the first transition and connected to a pushing device of the press, a punch of the second transition and mounted concentrically with it between the matrix of the first transition and the punch of the second transition and associated with the drive of its movement in the housing cavity; the drive for moving the ring clamp is made in the form of an elastic buffer and a spring placed on the outside of the housing, and the punch of the second transition is placed on the elastic buffer with the possibility of jointly moving along the ring clamp in axial direction relative to the ring clamp one. . The disadvantage of this punch is that in increasing gaba (eits of the parts being stamped and relatively high draw rates, i.e., with a relatively small difference in diameters, the first and second stretches sharply decrease the buoyant force returning the ring clamp to its original position. Ring clamp may occupy an indefinite intermediate position and the part will not be pushed onto the die mirror. The aim of the invention is to improve the reliability of the die. For this purpose, a stamp for a two-way stretch known from St. 825236, the ring clamp is made with a flange on the side surface, and the stamp is equipped with a spring located between the flange of the ring clamp and the hollow core, starting .. The drawing shows the stamp: on the left at the moment of the first transition, on the right - 6 end of the second The stamp contains a punch-matrix 1, a clamp 2, a matrix of the first transition 3, inside which there is a ring clamp C with a flange on the side surface and a punch of the second transition 5 coaxially with it, supported by elastic buffer b, placed in a hollow body 7, reinforced bolt 8 and spring 9. Compression springs 10 are placed between the flange of the ring clamp and the housing 7. The housing 7 is affected by the yoke of the press ejector II. The workpiece 12 is placed in the shampoo. The stamp works as follows. When the press slider moves down the bottom of the sleep matrix 1 with the help of clamp 2, it draws the first transition through the matrix 3. With the subsequent slide down, the die through the workpiece 12 acts on the ring hold down 4, lowering it down. The clamp with its conical surface compresses the elastic buffer 6 into a smaller diameter. Under the influence of the buffer, the punch of the second transition 5 moves up towards the punch-matrix 1 and draws the second transition. At the same time, springs 9 and 10 are compressed. When the slide is upwards, the elastic buffer 6 under the action of spring 9 takes on its original shape due to its own elasticity. The clamping force due to the buoyant force of the elasticity of the buffer 6 moves upwards under the action of the spring 10: it occupies the initial position relative to the buffer. Punch 5 also occupies the original position. During the further progress of the press ram upward, the yoke 11, the ejector pushes the hollow body 7 with the buffer 6 by the punch 5 and the ring clamp t, on which the stamped part is located, onto the stamp mirror. The buoyant force that returns the clamp 4 to its original position depends on the elastic properties of the elastic buffer, as well as on the sizes D and d, and on the efforts of the springs 9 and 10. In cases where the clamping force is small and the difference between the diameters is small, the return ring The clamping to the initial position occurs mainly due to the force of the springs 9 and 10, which only have to overcome the friction forces between the elastic buffer and the ring clamp f. The economic effect of using this stamp is expressed in increasing the reliability of its operation under any stamping conditions, which is especially important in conditions of mass production, such as dishes, when the stamp doesn’t work reliably with small clamping forces can lead to simple equipment or even complete failure. from overlapping operations for some drains. Claims of Invention Stamp for two-stage stretching according to ed. St. H ° 825236, about tl and the fact that, in order to increase the reliability of operation, the ring clamp is made with a flange on the side surface and the stamp is provided with a spring located between the flange of the ring clamp and the hollow body. Sources of information taken into account in the examination 1. USSR author's certificate W 825236, cl. B 21 D 22/2, 09.08.7 € (prototype).