SU900921A1

SU900921A1 - Apparatus for drawing stepped parts from sheet works

Info

Publication number: SU900921A1
Application number: SU772471905A
Authority: SU
Inventors: Шпачек Йиндрих; Смрчек Вацлав
Original assignee: Вызкумны Устав Тварецих Строю А Технологие Тварени (Инопредприятие)
Priority date: 1977-04-11
Filing date: 1977-04-11
Publication date: 1982-01-30

Description

Изобретение относится к листовой штамповке и касается в маетности конструкции устройства для гидромеханической вытяжки.The invention relates to sheet punching and relates to the construction of a device for hydromechanical drawing.

Известно устройство для вытяжки ступенчатых деталей из листовых заготовок, содержащее контейнер с рабочей средой, кольцевой прижим и установленный в его полости пуансон, связанный с приводом осевого перемещения и выполненный в виде центральной части, оформляющей меньшую ступень детали, и расположенной на ней с возможностью осевого перемещения втулки, оформляющей большую ступень детали. В известном устройстве контейнер крепится к верхней плите пресса и перемещается в процессе вытяжки [13 .A device is known for extracting stepped parts from sheet blanks, comprising a container with a working medium, an annular clamp and a punch installed in its cavity, connected to an axial displacement drive and made in the form of a central part that forms a smaller part stage and located on it with the possibility of axial displacement bush, making up a large step of the part. In the known device, the container is attached to the upper plate of the press and moves in the process of drawing [13.

Относительное перемещение частей пуансона осуществляется с помощью гидравлического цилиндра. В предлагаемом устройстве происходит сначала вытяжка большей ступени пуансона, а потом меньшей, что может привести к неравномерному утонению материала заготовки .The relative movement of the parts of the punch is carried out using a hydraulic cylinder. In the proposed device, there is first an extraction of a larger step of the punch, and then a smaller one, which can lead to uneven thinning of the workpiece material.

Цель изобретения - упрощение конструкции и повышение качества получаемых деталей.The purpose of the invention is to simplify the design and improve the quality of the resulting parts.

Указанная цель достигается тем, что внутренняя часть пуансона выполнена ступенчатой и связана с приводом со стороны большей ступени, наружная часть пуансона выполнена с продольной выемкой на наружной поверхности и установлена на меньшей ступени внутренней части с возможностью совместного с ней перемещения под действием большей ступени, а прижим снабжен упором, установленным со стороны его внутренней поверхности и входящим в выемку на наружной части пуансона.This goal is achieved by the fact that the inner part of the punch is made stepwise and connected to the drive from the side of the larger step, the outer part of the punch is made with a longitudinal recess on the outer surface and installed on the lower step of the inner part with the possibility of joint movement with it under the action of the larger step, and the clamp equipped with a stop mounted on the side of its inner surface and included in the recess on the outer part of the punch.

На фиг. 1 представлено устройство перед вытяжкой в исходном положении; на фиг, 2 - устройство в момент окончания вытяжки меньшей ступени детали;In FIG. 1 shows the device before drawing in the initial position; in Fig, 2 - the device at the time of the end of the hood of the lower stage of the part;

на фиг. 3 ~ устройство в момент окончания вытяжки всей детали.in FIG. 3 ~ device at the end of the hood of the entire part.

Устройство содержит контейнер 1 с жидкостью 2, в котором предусмотрен канал 3 для,отвода жидкости. На ₅верхнем торце контейнера помещено уплотнительное кольцо 4, на которое укладывают заготовку 5. На заготовку устанавливают кольцевой прижим 6, внутри которого проходит пуансон, 10 состоящий из внутренней части 7 и расположенный на нем с возможностью относительного осевого перемещения наружной части в виде втулки 8, имеющей на наружной боковой поверхности 15 продольную выемку 9. В прижиме со стороны внутренней поверхности установлен упор 10, входящий свободным концом в выемку на втулке 8« Внутренняя часть 7 пуансона связана с прйво- го дом осевого перемещения - с верхней плитой 11 пресса, на который устанавливается устройство.The device comprises a container 1 with a liquid 2, in which a channel 3 is provided for draining the liquid. A sealing ring 4 is placed on the ₅ upper end of the container, onto which the workpiece 5 is laid. An annular clamp 6 is installed on the workpiece, inside of which there passes a punch 10 consisting of the inner part 7 and located on it with the possibility of relative axial movement of the outer part in the form of a sleeve 8, having a longitudinal recess 9 on the outer lateral surface 15. A stop 10 is installed in the clamp on the side of the inner surface, which enters the recess on the sleeve 8 with its free end. The inner part 7 of the punch is connected to the straight house th movement - with an upper press plate 11, which is installed on the device.

При опускании плиты 11 в первую очередь на заготовку воздействует 25 внутренняя часть 7 пуансона, производя вытяжку меньшей ступени детали. При этом материал заготовки, не контактирующий с внутренней частью пуансона давлением жидкости поджимается jo к торцу втулки 8, что ведет к некоторому выпучиванию заготовки в этой зоне. Когда выступ 12 внутренней части 7 пуансона упирается в верхний торец втулки 8, обе составные части _Э5пуансона начинают перемещаться сов- местно, осуществляя вытяжку большей 'ступени детали. При этом на качество вытягиваемой детали положительно влияет то, что материал части заготовки оформляющей большую степень детали предварительно перемещают в противоположную сторону.When lowering the plate 11, first of all, the inner part 7 of the punch acts on the workpiece 25, extracting a smaller step of the part. In this case, the workpiece material that is not in contact with the inner part of the punch is pressurized by jo to the end face of sleeve 8, which leads to some bulging of the workpiece in this zone. When the protrusion 12 of the inner part 7 of the punch abuts against the upper end of the sleeve 8, both components of the punch _E5 begin to move _{together, drawing} out a larger 'step of the part. At the same time, the quality of the extruded part is positively affected by the fact that the material of the part of the workpiece forming a large degree of the part is previously moved in the opposite direction.

Claims

The invention relates to sheet punching and relates in particular to the design of a device for hydro-mechanical drawing. A device is known for extracting stepped parts from sheet shafts, ok, containing a container with a working medium, an annular clamp and a punch mounted in its cavity associated with a drive for axial movement and made in the form of a central part forming a smaller step of a part and located on it, with the possibility of axial movement of the sleeve, forming a large step of the part. In the known device, the container is attached to the top plate of the press and is moved during the process of drawing out. The relative movement of the parts of the punch is carried out using a hydraulic cylinder. In the proposed device, a larger step of the punch is first drawn, and then smaller, which can lead to uneven thinning of the workpiece material. The purpose of the invention is to simplify the design and improve the quality of the parts produced. This goal is achieved by the fact that the inner part of the punch is stepped and connected to the drive from the larger step, the outer part of the punch is made with a longitudinal notch on the outer surface and is installed on a smaller step of the inner suit with the possibility of joint movement with it under the action of a larger step, and The clamp is provided with a stop mounted on the side of its inner surface and entering the recess on the outside of the punch. FIG. 1 shows the device before stretching in the initial position; in fig. 2 — device at the time of drawing the end of a smaller step of the part; in fig. 3, the device at the time of drawing the entire part. The device comprises a container 1 with a liquid 2, in which a channel 3 is provided for the length. drainage fluid. A sealing ring 4 is placed on the upper end of the container, on which the workpiece 5 is placed. On the workpiece an annular clamp 6 is placed, inside which a punch passes, consisting of the inner part 7 and placed on it with the possibility of relative axial movement of the outer part in the form of a sleeve 8, having a longitudinal notch 9 on the outer side surface. A stop 10 is mounted on the side of the inner surface, entering the free end into the notch on the sleeve 8. The inner part 7 of the punch is connected with an axial drive remescheni - with an upper press plate 11, on which rules livaets device. When the plate 11 is lowered, the inner part of the punch 7 acts primarily on the workpiece, producing a lower part of the part. At the same time, the material of the workpiece that is not in contact with the inside of the punch is pressed by the liquid to the end of the sleeve 8, which leads to some bulging of the workpiece in this zone. When the protrusion 12 of the inner part 7 of the punch rests on the upper one of the cutting sleeve 8, both components of the punch begin to move together, having pulled out a larger part of the part. At the same time, the quality of the stretchable part is positively affected by the fact that the material of the part of the workpiece that forms a large degree of metal is previously moved in the opposite direction. Apparatus of the Invention A device for extracting stepped parts from sheet blanks, comprising a container with a working medium, an annular clamp and a punch mounted in its cavity, connected to a drive and made of two concentrically arranged parts with respect to axial displacement, characterized in that in order to simplify the design and improve the quality of the parts produced, the inner part of the punch is stepped and connected to the drive from the larger stage, the outer part of the punch is made with a longitudinal notch on the outer surface and mounted on a smaller step of the inner part with the possibility of joint movement with it under the action of a larger step, and the clamp is provided with an abutment mounted on the side of its inner surface and entering into a notch on the outer part of the punch. Sources of information taken into account during the examination 1. USSR Author's Certificate No., cl. B 21 D 22/12, 08/06/76.

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