SU719757A2

SU719757A2 - Stamp with elastic tool

Info

Publication number: SU719757A2
Application number: SU782597677A
Authority: SU
Inventors: Минна Андреевна Майская; Игорь Александрович Шавров; Александр Павлович Фейгин; Александр Яковлевич Потапов
Original assignee: Предприятие П/Я А-1944
Priority date: 1978-04-03
Filing date: 1978-04-03
Publication date: 1980-03-05

Description

Изобретение относится к технологической оснастке для холодной листовой штамповки, используемой в машино- и приборостроении.The invention relates to tooling for cold stamping used in machine and instrument engineering.

По основному авт. св. № 558739 известен штамп с эластичным инструментом, используемый для штамповки листовых деталей. Этот штамп состоит из жесткого инструмента и контейнера с эластичным инструментом, рабочая поверхность которого выполнена криволинейной с вогнутыми участками в зонах, прилегающих к местам взаимодействия эластичного инструмента с кромками жесткого инструмента [1J.According to the main author. St. No. 558739 known stamp with an elastic tool used for stamping sheet metal parts. This stamp consists of a rigid tool and a container with an elastic tool, the working surface of which is made curved with concave sections in areas adjacent to the places of interaction of the elastic tool with the edges of the hard tool [1J.

Однако неправильный выбор размеров и формы вогнутого участка может привести к потере устойчивости эластичного инструмента, которая препятствует равномерному деформированию штампуемой заготовки и ухудшает качество деталей. При этом не происходит сжатия рабочей поверхности эластичного инстру1,0 мента и, как следствие этого, его стойкость не увеличивается.However, the wrong choice of the size and shape of the concave section can lead to a loss of stability of the elastic tool, which prevents uniform deformation of the stamped workpiece and affects the quality of the parts. In this case, there is no compression of the working surface of the elastic tool 1.0 ment and, as a consequence of this, its resistance does not increase.

Цель изобретения - увеличение стойкости штампами качества штампуемых деталей..The purpose of the invention is to increase the durability of quality stamped stamped parts ..

Поставленная цель достигается тем, что глубина вогнутости эластичного инструмента составляет не более 0,2 ее ширины.The goal is achieved in that the depth of concavity of the elastic tool is not more than 0.2 of its width.

На чертеже изображена предлагаемая конструкция штампа.The drawing shows the proposed design of the stamp.

Штамп состоит из жесткого инструмента 1 и контейнера 2 с эластичным инструментом 3 с вогнутым участком на рабочей поверхности имеющим ширину о и глубину h При этом h/й ё0,2.The stamp consists of a rigid tool 1 and a container 2 with an elastic tool 3 with a concave section on the working surface having a width o and depth h. In this case, h / th ё 0.2.

Штамп работает следующим образом.The stamp works as follows.

При встречном движении жесткого инструмента 1 и контейнера 2 происходит деформирование эластичного инструмента 3. Рабочая поверхность вогнутого участка эластичного инструмента выпрямляется, при этом она сжимается и на ней возникают сжимающие напряжения.When the hard tool 1 and the container 2 meet in the opposite direction, the elastic tool 3 is deformed. The working surface of the concave section of the elastic tool is straightened, while it is compressed and compressive stresses arise on it.

......

..........' 3 ........ ·“---.......... '3 ........ · “---

Затем происходит формоизменение листовой заготовки 4.Then occurs the shaping of the sheet blank 4.

Когда в эластичном инструменте до момента контакта с листовой заготовкой возникают сжимающие напряжения, действие растягивающих напряжений на поверхности эластичного инструмента при штамповке сводят к минимуму или вообще исключают.When compressive stresses occur in the elastic tool before contact with the sheet blank, the action of tensile stresses on the surface of the elastic tool during stamping is minimized or eliminated altogether.

При этом если вогнутый участок эластичного инструмента имеет глубину вогнутости не превышающую 0,2 ширины, выпрямление его происходит без потери устойчивости.Moreover, if the concave portion of the elastic tool has a concavity depth not exceeding 0.2 width, its straightening occurs without loss of stability.

Предлагаемый штамп позволяет, по сравнении с известным увеличить стойкость с 1000О до 15000-20000 на719757 4 гружений, т.е. в 1,5-2 раза, и изготавливать детали высокого качества.The proposed stamp allows, in comparison with the known, to increase the resistance from 1000O to 15000-20000 to 719757 4 loads, i.e. 1.5-2 times, and produce high quality parts.

Claims

The invention relates to a process tooling for cold plate forming used in machine building and instrument making .; On the main auth, sv. No. 558739 is a stamp with an elastic tool, used for stamping sheet metal parts. This stamp consists of a rigid tool and a container with an elastic tool, the working surface of which is curved with concave portions in areas adjacent to the contact points of the elastic tool with the edges of the hard tool 13. However, the wrong choice of size and shape of the concave portion can lead to loss of elasticity of the elastic a tool that interferes with the uniform de ({the clamping of a blank workpiece and degrades the quality of parts. At the same time, there is no compression of the working surface and an elastic tool and, as a result, its durability does not increase. The purpose of the invention is to increase the durability by stamps of the quality of the parts to be stamped. The goal is achieved, since the head of the concavity of the elastic tool is not more than 0.2 of its width. The drawing shows the proposed stamp design. The stamp consists of a hard tool 1 and a container 2 with an elastic tool 3 with a concave section on the working surface having a width o and a depth h At the same time h / and eO,

2. The stamp works as follows. When counter movement of the hard tool 1 and the container 2 deformation of the elastic tool occurs

3. The working surface of the concave portion of the elastic tool is straightened, while it is compressed and compressive stresses occur on it. Then a formbatting of sheet stocking occurs.

4. When compressive stresses occur in an elastic tool prior to contact with the sheet stock, the effect of tensile stresses on the bent points of the elastic tool is reduced to a minimum or completely eliminated. At the same time, if a concave section of a classical instrument has a depth of concavity not exceeding 0, 2 widths, straightening it occurs without loss of stability. The proposed stamp makes it possible, in comparison with the known stamp, to increase the STRENGTH from 10,000 to 15bbO-2b600 per 7 74 flooding, i. 1.5-2 times. and produce high quality parts. Claims of the invention Stamp with an elastic tool according to the author. St. No. 558739, which is also distinguished by the fact that, in order to increase the durability of the stamp and the quality of the parts being stamped, the concavity depth of the elastic tool is no more than 0.2 of its width. Sources of information taken by Bio for the attention of expert examination 1. USSR Author's Certificate No. 558739, cl. B 21 D 28/18, 1975 (prototype).