SU904832A1

SU904832A1 - Bending die for producing z-shaped parts from strip material

Info

Publication number: SU904832A1
Application number: SU802919861A
Authority: SU
Inventors: Давид Абрамович Вайнтрауб; Инна Юрьевна Власова
Original assignee: Ленинградский Институт Точной Механики И Оптики
Priority date: 1980-05-05
Filing date: 1980-05-05
Publication date: 1982-02-15

Description

Изобретение относится к области обработки металлов давлением, в частности, к штампам для листовой штамповки.The invention relates to the field of metal forming, in particular, to stamps for sheet stamping.

Известны штампы для изготовления z-образных деталей гибкой полосового ⁵материала , содержащие пуансон и матрицу , форма рабочей поверхности которых соответствует заданной форме детали Г-Н.Known dies for the manufacture of z-shaped parts of a flexible strip ⁵ material containing a punch and a matrix, the shape of the working surface of which corresponds to the given shape of the part GN.

Недостаток таких штампов состоит в том, что они не обеспечивают точности формы и размеров штампуемой детали, так как заготовка в процессе сближения пуансона с матрицей может смещаться в ту или иную сторону.The disadvantage of such dies is that they do not provide accuracy in the shape and size of the stamped part, since the workpiece in the process of approaching the punch with the matrix can be shifted in one direction or another.

Наиболее близким по технической сущности и достигаемому эффекту к предлагаемому является гибочный штамп для изготовления z-образных деталей _жиз полосового материала, содержащий установленные на одной из плит штампа пуансоны первого и второго перехог дов гибки исмонтированные на другой плите матрицу и выталкиватель. Пуансон первого перехода гибки подпружинен к несущей его плите, а пуансон второго перехода закреплен на этой плите жестко L2].The closest in technical essence and the achieved effect to the proposed one is a bending stamp for the manufacture of z-shaped parts _w from strip material containing the first and second bending punches mounted on one of the plates of the bending die and an ejector mounted on another plate. The punch of the first transition is flexible spring-loaded to its supporting plate, and the punch of the second transition is fixed on this plate rigidly L2].

Однако данный штамп пригоден только для изготовления деталей большой высоты (с большим расстоянием между полками), преимущественно более 20-25 толщин штампуемого материала. Между тем в приборостроении и радиоэлектронике часто встречаются детали с небольшим расстоянием между полками, В среднем около пяти толщин материала, причем необходимо выдержать это расстояние и форму детали с большой точностью,However, this stamp is suitable only for the manufacture of parts of large height (with a large distance between the shelves), mainly more than 20-25 thicknesses of the stamped material. Meanwhile, in instrumentation and electronics often there are parts with a small distance between the shelves, On average about five thicknesses of material, and it is necessary to maintain this distance and the shape of the part with great accuracy,

Целью изобретения является повышение точности размеров, деталей небольшой высоты, преимущественно не превышающей пяти толщин штампуемого материала.The aim of the invention is to improve the accuracy of dimensions, details of small height, mainly not exceeding five thicknesses of the stamped material.

Поставленная цель достигается тем, что в штампе, содержащем установленThis goal is achieved by the fact that in the stamp containing

90^832 ный на одной из плит штампа подпружиненный пуансон первого перехода гибки и пуансон второго перехода гибки, а также смонтированные на другой плите матрицу и выталкиватель, пуансон второго перехода выполнен в виде ползушки, размещенной в пуансоне первого перехода с возможностью возвратно-поступательного перемещения в направлении, параллельном рабочему торцу матрицы, а штамп снабжен механизмом перемещения ползушки.The spring-loaded punch of the first bending step 90 and the punch of the second bending step 90 ^ 832 on one of the plates of the stamp, as well as the die and the ejector mounted on the other plate, the punch of the second transition is made in the form of a crawler placed in the punch of the first transition with the possibility of reciprocating movement in a direction parallel to the working end of the matrix, and the stamp is equipped with a mechanism for moving the crawler.

10'10'

Механизм перемещения ползушки выполнен в виде по меньшей мере одного клина, жестко закрепленного на плите, несущей пуансоны, и взаимодействующего с ползушкой.The mechanism for moving the crawler is made in the form of at least one wedge rigidly fixed to the plate bearing punches and interacting with the creeper.

На чертеже показан предлагаемый штамп, разрез. _м The drawing shows the proposed stamp, section. _m

Штамп содержит в верхней части плиту 1 стандартного блока (не показан), в которой помещены по меньшей мере три толкателя 2.К плите 1 прикреплены', прокладка 3 и держатель Ь, в котором закреплен клин 5.The stamp contains in the upper part a plate 1 of a standard block (not shown) in which at least three pushers 2 are placed. To the plate 1 are attached ', a gasket 3 and a holder b, in which the wedge 5 is fixed.

С плитой 1 связан с возможностью вертикального перемещения пуансон первого перехода гибки, выполненный составным из держателя 6 и рабочей части _мпуансона 7. В пуансоне 7 первого перехода размещен пуансон-ползушка 8 второго перехода, взаимодействующий с клином 5.A punch of the first bending transition made of a holder 6 and a working part _{m of the} punch 7 is connected with the plate 1 with the possibility of vertical movement. In the punch 7 of the first transition there is a punch-crawler 8 of the second transition interacting with the wedge 5.

Связь держателя 6 с плитой 1 обеспечивается по меньшей мере т.ремя сту пенчатыми винтами 9_? а усилие толкателей 2 создают комплекты сильных,например, тарельчатых пружин 10, поджатых резьбовыми пробками (не показа-, ны), сидящими в отверстиях плиты 1.The connection of the holder 6 with the plate 1 is provided at least by three step screws 9 _? and the force of the pushers 2 is created by sets of strong, for example, Belleville springs 10, pressed by threaded plugs (not shown, shown) sitting in the holes of the plate 1.

В нижней части штамп содержит матвыталкиватель 12. Выталкиопирается на штифты 13, менее трех, проходящие через, отверстия в нижней плите 1^ блока и воспринимающие усилие буферного устройства. (не показано).In the lower part, the stamp contains a pusher 12. It is pushed against pins 13, less than three, passing through the holes in the bottom plate 1 ^ of the block and absorbing the force of the buffer device. (not shown).

Для обеспечения правки детали в конце рабочего хода рабочие инструменты штампа выполнены с наклонными к горизонтали рабочими поверхностями, преимущественно на 7°. Пуансон-ползушка 8 размещен с возможностью перемещения в направлении, параллельном рабочему торцу матрицы 11.To ensure that the part is corrected at the end of the stroke, the working tools of the stamp are made with working surfaces inclined to the horizontal, mainly by 7 °. The punch-crawler 8 is placed with the possibility of movement in a direction parallel to the working end of the matrix 11.

Штамп работает следующим образом.The stamp works as follows.

Плоскую заготовку детали (не показана) укладывают на выталкиватель...A flat piece of workpiece (not shown) is laid on the ejector ...

рицу 11 и ватель 12 числом неRitsa 11 and Vatel 12 are not

45.45.

! 4 и фиксируют, например, штифтами (не показаны). При рабочем ходе пресса верхняя часть штампа опускается и пуансон 7 прижимает заготовку к выталкивателю 12. Так как усилие пружин 10 больше усилия буферного устройства, выталкиватель 12 опускается вместе с пуансоном? и заготовкой, причем конец заготовки отгибается . вверх на рабочей кромке матрицы 11. После того, как выталкиватель 12 доходит до крайнего нижнего положения и остановится,вместе с ним остановится и пуансон 7. Так как верхняя плита 1 штампа опускается,клин 6 приводит в движение пуансон 8, который отгибав, влево конец заготовки и образует деталь обусловленной высоты. В конце рабочего хода сомкнувшиеся пуансоны 7 и 8, матрица 11 и выталкиватель 12 обеспечивают правку детали.! 4 and fixed, for example, with pins (not shown). During the working stroke of the press, the upper part of the die drops and the punch 7 presses the workpiece against the ejector 12. Since the force of the springs 10 is greater than the force of the buffer device, the ejector 12 drops with the punch? and the workpiece, and the end of the workpiece is bent. up on the working edge of the die 11. After the ejector 12 reaches the lowest position and stops, the punch 7 will stop along with it. Since the upper plate 1 of the die is lowered, the wedge 6 drives the punch 8, which bends the end to the left blanks and forms a part of a predetermined height. At the end of the stroke, the closed punches 7 and 8, the matrix 11 and the ejector 12 provide dressing details.

При раскрытии штампа все его детали срабатывают в обратном порядке и готовую деталь снимают с выталкивателя 12.When the stamp is opened, all its parts are triggered in the reverse order and the finished part is removed from the ejector 12.

По мере надобности, например при. гибке детали увеличенной ширины или длины, в верхней части штампа могут быть установлены два клина, расположенные по краям пуансона.As needed, for example. bending parts of increased width or length, two wedges located on the edges of the punch can be installed in the upper part of the stamp.

Предлагаемая конструкция Штампа обеспечивает возможность получения деталей небольшой высоты с минимальными радиусами закругления и точным соблюдением заданных размеров за один ход пресса.The proposed design of the Stamp provides the ability to obtain parts of small height with minimal rounding radii and exact observance of the set dimensions in one stroke of the press.

Claims

The invention relates to the field of metal forming, in particular, to stamping dies. Stamps are known for making z-shaped parts of a flexible strip material containing a punch and a die, the shape of which working surface corresponds to a given shape of the part l-lJ. The disadvantage of such stamps is that they do not ensure the accuracy of the shape and size of the part being stamped, since the workpiece can move in one direction or another in the process of drawing the die to the die. The closest in technical essence and the achieved effect to the proposed is a bending strain for making z-shaped parts from a strip material containing punches of the first and second bends mounted on one of the die plates and mounted on another plate of the die and ejector. The punch of the first transition is flexibly spring-loaded to its carrier plate, and the punch of the second transition is rigidly fixed on this plate 121. However, this stamp is only suitable for manufacturing parts of great height (with a large distance between the shelves), mainly more than 20-25 thicknesses of the material being forged. Meanwhile, in instrument making and radio electronics, parts with a small distance between the shelves, on average about five thicknesses of the material, are often encountered, and it is necessary to maintain this distance and the shape of the part with great accuracy. The aim of the invention is to improve the dimensional accuracy of parts of small height, preferably not exceeding five thicknesses of the material being forged. The goal is achieved by the fact that in a stamp containing a spring loaded punch of one of the punch plates, a spring-loaded punch of the first transition are flexible and the punch of the second transition are flexible, as well as the ejector and ejector mounted on another plate, the punch of the second transition is designed as a slider placed in the punch of the first transition with the possibility of reciprocating movement in the direction parallel to the working end of the matrix, and the stamp is equipped with a mechanism for moving the slider. The mechanism for moving the slider is made in the form of at least one wedge rigidly fixed on the plate bearing the punches, and interacting with the slider. The drawing shows the proposed stamp, section, the Stamp contains in the upper part of the plug 1 of a standard block (not shown) in which at least three pushers are placed

2. A plate 3 is attached to the plate 1 and the holder i in which the wedge 5 is fixed. With the plate 1 it is connected with the possibility of vertical movement of the punch of the first bending junction, made composite of the holder 6 and the working part of the punch 7. In the punch 7 of the first the transition is placed punch-slider 8 of the second transition, which interacts with the wedge 5. The connection of the holder 6 with the plate 1 is provided by at least three step screws 9. And the force of the pushors 2 is created by sets of strong, for example, cup springs 10, threaded by thread plugs ( not pok are located) at the bottom of the plate 1. The stamp at the bottom contains the matrix 11 and the ejector 12. The ejector 12 rests on the pins 13, numbering at least three, the black holes in the bottom plate of the first block and the receiving force of the buffer device (not shown). To ensure that the part is edited at the end of the stroke, the die working tools are made with working surfaces inclined towards the horizontal, preferably by 7 °. A punch 8 is placed with the possibility of displacement in a direction parallel to the working end of the matrix 11. The stamp works as follows. Flat workpiece details (not shown) is placed on the ejector 12 and fixed, for example, pins (not shown). During the working stroke of the press, the upper part of the punch is lowered and the punch 7 presses the workpiece against the ejector 12. As the force of the springs 10 is greater than the force of the buffer device, the ejector 12 lowers together with the punch 7 and the workpiece, with the end of the workpiece bent. up on the working edge of the matrix 11. After the ejector 12 reaches the lowest position to stop, the punch 7 will stop along with it. As the upper plate 1 of the stamp is lowered, the wedge 6 drives the punch 8, which is bent to the left end of the workpiece. and forms a detail due to the height. In the end . working driver closed punches 7 and 8, the matrix 11 and the ejector 12 provide editing details. When a stamp is opened, all its parts work in the reverse order and the finished part is removed from the ejector 12. As required, for example, at. Bending parts of increased width or length, two wedges located along the edges of the punch can be installed in the upper part of the stamp. The proposed die design provides the possibility of obtaining parts of small height with minimal rounding radii and accurate observance of specified dimensions in one stroke of the press. Claims of the invention. Bending punch for preparing 1 z-shaped pieces of strip material, comprising a spring-loaded punch of the first bending transition mounted on one of the die plates, and a second transition punching bend, as well as an ejector mounted on another plate, characterized in that In order to increase the dimensional accuracy of small parts, preferably not exceeding five Walsins of the material being forged, the second transition punch is made in the form of a slider placed in the first transition punch from the ozhnostyu reciprocating movement in a direction parallel to the working end of the matrix.