SU897352A1

SU897352A1 - Method of forming annular parts

Info

Publication number: SU897352A1
Application number: SU802919820A
Authority: SU
Inventors: Михаил Николаевич Горбунов; Виктор Анатольевич Карюкин; Александр Дмитриевич Ковалев
Original assignee: Московский авиационный технологический институт им.К.Э.Циолковского
Priority date: 1980-04-22
Filing date: 1980-04-22
Publication date: 1982-01-15

Description

Изобретение относится к обработке металлов давлением и может быть использовано при штамповке кольцевых деталей типа шайб. сThe invention relates to the processing of metals by pressure and can be used for stamping ring parts such as washers. from

Известей способ штамповки кольцевых деталей путем обжима к раздаче трубчатой заготовки с последующей осадкой на плоскости [1] .Lime is a method of stamping ring parts by crimping to distributing a tubular workpiece with subsequent upsetting on a plane [1].

Недостатком данного способа является ограниченная степень формоизменения за одну, операцию из-за тангенциальной потери устойчивости заготовки.“Поэтому трубчатая заготовка перед укладкой на плоскость деформируется за две операции на конической оснаст- 15 ке с увеличением угла конусности оснастки.The disadvantage of this method is the limited degree of shaping in one operation due to the tangential loss of stability of the workpiece. “Therefore, the tubular workpiece is deformed before being laid on a plane in two operations on conical equipment with an increase in the taper angle of the equipment.

Целью изобретения является увеличение технологических возможностей 20 процесса за счет уменьшения числа операций и повышение производительности.The aim of the invention is to increase the technological capabilities of the process 20 by reducing the number of operations and increasing productivity.

Поставленная цель достигается тем., что согласно способу штамповки кольцевых 'деталей , включающему изменение 25 диаметральных размеров конца трубчатой заготовки с последующей осадкой на плоскости, диаметральные размеры конца трубчатой заготовки изменяют выворотом его наружу или вовнутрь, а осадку выполняют на' ограниченной кольцевой плоскости.This goal is achieved by the fact that according to the method of stamping annular 'parts, including changing 25 diametrical dimensions of the end of the tubular billet with subsequent upsetting on a plane, the diametrical dimensions of the end of the tubular billet are changing by turning it outward or inward, and the upset is performed on a' limited ring plane.

Способ поясняется чертежом на фиг.The method is illustrated by the drawing in FIG.

и 2, где на^фиг. 1 показана операция предварительного выворота наружу (выворот можно осуществлять и вовнутрь) трубчатой заготовки; на фиг. 2 — операция осадка на кольцевой плоскости ограниченной диаметральными упорами. .and 2, where in FIG. 1 shows a preliminary eversion operation (eversion can also be performed inward) of the tubular workpiece; in FIG. 2 - operation of sediment on an annular plane limited by diametrical stops. .

Способ осуществляется следующйм способом.The method is carried out as follows.

В первой операции толкатель 1 выворачивает заготовку 2 по оправке 3. ,Во второй операции деформированная эа- * готовка 2’ укладывается на кольцевую • плоскость между диаметральными упорами 4, выполненными в плоскости матрицы 5, и осаживается пуансоном 6.In the first operation, the pusher 1 turns the workpiece 2 along the mandrel 3., In the second operation, the deformed ea * preparation 2 ’is laid on the annular • plane between the diametrical stops 4 made in the plane of the matrix 5 and is deposited by the punch 6.

Диаметральные упоры 4 регулируют степень обжима и раздачи. Большая степень формоизменения достигается за счет отсутствия напряжений спрямления при вывороте заготовки, имеющих место при обжиме и раздаче на конической .оснастке, и напряжений изгиба при укладке на плоскость, возникающих при» укладке на плоскость конической коль3 цевой заготовки. Резервная величина меридиально напряжения равна где (3 - напряжение текущего материала; _The diametrical stops 4 regulate the degree of crimping and distribution. A large degree of shaping is achieved due to the absence of straightening stresses during eversion of the workpiece, which occur during crimping and distribution on a conical tool, and bending stresses when laying on a plane that arise when laying a conical ring workpiece onto a plane. The reserve value of the meridial stress is equal to where (3 - stress of the current material; _

Rp_r свободный радиус изгиба; ³ радиус выворота;Rp_r free bending radius; ³ radius of eversion;

S - толщина заготовки.S is the thickness of the workpiece.

Выбор радиуса выворота Rpj, производится исходя из пластических свойств материала и геометрических характерно ' тик заготовки и изделия.The choice of the eversion radius Rpj is made on the basis of the plastic properties of the material and the geometric characteristic 'teak of the workpiece and product.

При изготовлении кольцевых деталей из трубных заготовок 0 45 мм и толщиной стенки 1,6 мм при высоте заготов-., ки 16,2 мм из материала АМг-ЗМ выво- ³ротом наружу по радиусу Rpj, = 5 мм. в первой операции получают заготовку в виде полутора с внутренним радиусом окружности г =21,7 мм и наружным радиусом окружности R = 31,7 мм, во в то™ рой операции деформированную заготовку укладывают в полость матрицы с кольцевыми упорами, диаметры которых 65 мм и 35 мм соответственно внешнего и внутреннего кольцевых упоров, и отка-25 либровывают. Полученная кольцевая деталь имеет следующие размеры: внешний диаметр D = 65 мм, внутренний диаметр d = 35 мм, толщина S = 1,5 мм.In the manufacture of ring parts from tube blanks of 0 45 mm and a wall thickness of 1.6 mm with a workpiece height of 16.2 mm, the material AMg-ZM was pulled ³ outward with a radius of Rpj, = 5 mm. in the first operation, a workpiece is obtained in the form of one and a half with an inner circle radius r = 21.7 mm and an outer circle radius R = 31.7 mm, while in the second operation, the deformed workpiece is placed in the die cavity with ring stops, the diameters of which are 65 mm and 35 mm, respectively, of the outer and inner ring stops, and the fail-25 is calibrated. The obtained annular part has the following dimensions: outer diameter D = 65 mm, inner diameter d = 35 mm, thickness S = 1.5 mm.

Таким образом, изобретение позволяет уменьшить количество операций до двух.Thus, the invention allows to reduce the number of operations to two.

Цеховая себестоимость изделия без учета накладных цеховых расходов снижается на 20% при изготовлении кольцевых деталей из алюминевомагниевых сплавов.Workshop cost of the product, excluding workshop overhead, is reduced by 20% when manufacturing ring parts from aluminum-magnesium alloys.

Claims

The invention relates to the processing of metals by pressure and can be used in stamping ring-shaped parts such as washers. The known method of punching ring parts by crimping to the distribution of a tubular billet with subsequent downfall on the plane. The disadvantage of this method is the limited degree of shaping in one, the operation due to tangential loss of stability of the billet, and so the tubular billet is deformed in two steps to conical tooling with increasing taper angle of the rigging. The aim of the invention is to increase the technological capabilities of the process by reducing the number of options and increasing productivity. According to the method of forming ring parts, including changing the diametrical dimensions of the end of the tubular billet with subsequent sinking of the plane, the diametrical dimensions of the end of the tubular billet change inverting it outwards or inwards, and the draft is performed on a limited annular plane. The method is illustrated in FIG. 1 and 2, where, FIG. Figure 1 shows the pre-inversion operation outward (the inversion can also be carried out inwards) of the tubular blank; in fig. 2 is a sediment operation on an annular plane limited by diametrical stops. The method is carried out in the following way. In the first operation, the pusher 1 twists the workpiece 2 along the mandrel 3. In the second operation, the deformed workpiece 2 is placed on the annular plane between the diametrical stops 4, made in the plane of the matrix 5, and is deposited by the punch b. The diaphragm stops 4 regulate the degree of crimping and dispensing. A greater degree of deformation is achieved due to the absence of tension stresses during the reversal of the workpiece, which occur during compression and distribution on the conical tooling, and bending stresses when laying on the plane, which occur when laying on the plane of the conical ring blank. The reserve value of the meridian voltage is equal to (Ije S where d is the voltage of the current material r Rp is the free radius of the bend; Rp-- radius of the inversion; S is the thickness of the workpiece. The choice of the radius of the inversion Hp is based on the plastic properties of the material and the geometric characteristics of the workpiece and product In the manufacture of ring parts from billet billets 045 1lm and a wall thickness of 1.6 mm with a height of the workpiece 16.2 mm from AMg-3M material, turning outwards over a radius of 5 mm, in the first operation, a billet in the form of one and a half with an inner radius is obtained 21.7 mm and an outer radius of circumference R 31.7 mm, in the second operation, the deformed workpiece is inserted into the cavity of the matrix with annular stops, the diameters of which are 65 m and 35 mm, respectively, the external and internal annular stops, and calibrated. the part has the following dimensions: external diameter D 65 mm, internal diameter d 35 mm, thickness S 1.5 mm, Thus, the invention reduces the number of operations to two. The shop cost of the product, excluding overhead shop expenses, is reduced by 20% in the manufacture of ring parts from aluminum-magnesium alloys. The invention of the method of forming ring parts, including changing the diametral dimensions of the end of a tubular billet, followed by draft on the plane, is characterized by the fact that, in order to expand technological capabilities by reducing operations and increasing productivity, the diameter is. The dimensions of the end of the tubular billet are changed by inverting it outwards or inwards, and the draft is performed on a limited annular plane. sources of information taken into account in the examination 1. Gorbunov M.N. Stamping parts from tubular blanks. M., Mashgiz, 1960, p. 129 (prototype).