SU742023A1

SU742023A1 - Cross-extrusion method

Info

Publication number: SU742023A1
Application number: SU782620295A
Authority: SU
Inventors: Михаил Афанасьевич Бородин; Евгений Николаевич Юдин; Константин Александрович Кирсанов
Original assignee: Чеховский завод энергетического машиностроения
Priority date: 1978-05-30
Filing date: 1978-05-30
Publication date: 1980-06-25

Description

Изобретение относится к области обработки металлов давлением и может быть использовано при получении изделий с боковыми выступами (фланцами, отростками) путем поперечного выдавливания.The invention relates to the field of metal forming and can be used to obtain products with lateral protrusions (flanges, processes) by transverse extrusion.

Известен способ поперечного выдавливания путем воздействия пуансоном на торец заготовки £1]. Его недостатком является низкое качество изделий ввиду образования застойных зон и зажимов в угловых участках.A known method of transverse extrusion by exposing the punch to the end face of the workpiece £ 1]. Its disadvantage is the low quality of the products due to the formation of stagnant zones and clamps in the corner sections.

Известен способ поперечного выдавливания, при котором на торец заготовки воздействуют пуансоном, перемещая его в осевом направлении, и одновременно перемещают контрпуансон в том же направлении Это способствует изменению кинематики течения материала заготовки по сравнению со способом W, так как материал течет одновременно в двух направлениях: в поперечном, формируя боковой выступ на заготовке, и в продольном, заполняя пространство, образующееся в результате перемещения контрпуансона. Это способствует исключению образования застойных зон и образования зажимов.A known method of transverse extrusion, in which the end face of the workpiece is punch, moving it in the axial direction, and at the same time move the counter-punch in the same direction. This contributes to a change in the kinematics of the flow of the workpiece material compared to method W, since the material flows simultaneously in two directions: transverse, forming a lateral protrusion on the workpiece, and in the longitudinal, filling the space formed as a result of the movement of the counter-punch. This helps to eliminate the formation of stagnant zones and the formation of clamps.

Однако известным способом невозможно получать изделия с выступами, рас.положенными непосредственно у контактирующего с контрпуансоном торца, т.е. номенклатура выдавливаемых изделий ограничена.However, in a known manner it is impossible to obtain products with protrusions located directly at the end in contact with the counter-punch, i.e. the range of extruded products is limited.

С целью устранения указанного недостатка, т.е. с целью расширения номенклатуры выдавливаемых изделий, предварительно контрпуансон внедряют в заготовку, образуя в ней полость.In order to eliminate this drawback, i.e. in order to expand the range of extruded products, pre-counter punch is introduced into the workpiece, forming a cavity in it.

При последующем перемещении контпуансона в обратном направлении он извлекается из предварительно образованной полости, давая возможность материалу заготовки заполнять эту полость.With the subsequent movement of the counter-punch in the opposite direction, it is removed from the pre-formed cavity, allowing the workpiece material to fill this cavity.

На чертежах показана, схема осуществления способа на примере выдавливания изделия с одним боковым отростком (на фиг. 1 показано исходное положение заготовки и инструмента; на фиг. 2 - момент окончания внедрения контрпуансона в заготовку и начало воздействия основного пуансона; на фиг. 3 « конечный момент выдавливания).The drawings show a diagram of the method for the extrusion of an article with one lateral process (in Fig. 1 shows the initial position of the workpiece and tool; in Fig. 2 - the moment of completion of the introduction of the counter-punch into the workpiece and the beginning of the action of the main punch; in Fig. 3 "end extrusion moment).

Способ осуществляется следующим образом.The method is as follows.

Заготовку устанавливают в фасонной полости штампа 1, деформирующий пуансон 2 приводят в соприкосновение с торцом заготовки 3 и в противополож» ный ее торец внедряют контрпуансон 4. После этого перемещают пуансон 2 в осевом направлении. В процёссе приложения усилий на деформирующий пуансон 2 по мере истечения металла в боковую полость извлекают из заготовки контрпуансон 4, перемещая его в том же направлении, что и пуансон 2. В результате этого металл течет в двух направлениях, заполняя полость бокового отростка и полость, образованную контрпуансоном по мере его извлечения, что при формообразовании изделий с боковыми отростками исключает образование застойных зон и возникновение зажимов при расширении номенклатуры изделий.The workpiece is installed in the shaped cavity of the stamp 1, the deforming punch 2 is brought into contact with the end face of the workpiece 3, and the counter punch 4 is inserted into its end face 4. Then, the punch 2 is moved in the axial direction. In the process of applying force to the deforming punch 2 as the metal flows into the side cavity, the counter punch 4 is removed from the workpiece by moving it in the same direction as the punch 2. As a result, the metal flows in two directions, filling the cavity of the lateral process and the cavity formed counterpunch as it is removed, which during the formation of products with lateral processes excludes the formation of stagnant zones and the occurrence of clamps when expanding the product range.

Пример'. Штамп с разъемной матрицей имеет две полости. Одну под отросток с диаметром 65 мм и другую, расположенную на том же уровне, что и основная, диаметром 65 мм. Выдавливание производят из заготовок диаметром 83 мм (диаметр контейнера 85 мм) стали 20 ГОСТа 1050-74 и стали 12x1 МФ ГОСТа 20072-74. Диаметр контрпуансона 65 мм с радиусом сферы торца 180 мм. Глубинд вдавливания контр· пуансона 3,5 мм. Глубина перемещения пуансона варьируется в ходе экспериментов от 10 мм до 15 мм. Длина получаемого отростка больше критического. Зажимов не обнаруживается. Микрошлифы хорошие.Example'. The split die stamp has two cavities. One for the process with a diameter of 65 mm and another, located at the same level as the main, with a diameter of 65 mm. Extrusion is carried out from blanks with a diameter of 83 mm (container diameter 85 mm) of steel 20 GOST 1050-74 and steel 12x1 MF GOST 20072-74. The diameter of the counter-punch is 65 mm with a radius of the sphere sphere of 180 mm. Indentation depth of counter · punch 3.5 mm. The depth of movement of the punch varies during the experiments from 10 mm to 15 mm. The length of the resulting process is more than critical. No clamps are detected. Microsections are good.

Использование предлагаемого способа поперечного выдавливания обеспечивает 10 по сравнению с извёстным способом получение изделий с боковыми отростками, которые могут быть на уровне торца без дефектов (зажимов).Using the proposed method of transverse extrusion provides 10 compared with the known method of obtaining products with lateral processes that can be at the end face without defects (clamps).

Claims

The invention relates to the field of metal forming and can be used to obtain products with side projections (flanges, spikes) by transverse extrusion. The known method of transverse extrusion is caused by the punch acting on the end face of the billet. The disadvantage is the low quality of the products due to the formation of stagnant zones and clips in the corner sections. The known method of transverse extrusion of vanilla, with KOTqpoM on the end of the billet, acts as a punch, moving it in the axial direction, and at the same time moving the counterpunch in the same direction 2. This contributes to a change in the kinematics of the billet material flow compared to the two methods directions: in the transverse, forming a lateral protrusion on the workpiece, and in the longitudinal direction, filling the space resulting from the displacement of the counter-punch. This contributes to the avoidance of stagnant zones and the formation of clamps. However, it is not possible in a known manner to obtain products with protrusions located directly at the end contacting with the counter-punch, i.e. the nomenclature of the extruded products is limited. In order to eliminate this drawback, i.e. in order to expand the range of products to be inserted, the precontroller introduced 5pot into the workpiece, forming a cavity in it. Upon subsequent movement of the punch pan in the opposite direction, it is removed from the pre-formed cavity, allowing the workpiece material to fill this cavity. The drawings show a diagram of the implementation of the best way using the example of a product with one 6oKOBbnvi process (Fig. 1 shows the initial position of the workpiece and the tool; Fig. 2 shows the end of the insertion of the counter punch into the workpiece and the effect of the main punch; Fig. 3 final extrusion moment). The method is carried out as follows. The workpiece is installed in the shaped cavity of the stamp 1, the deforming punch 2 is brought into contact with the end face of the workpiece 3, and a counter-punch 4 is inserted into its opposite end. After that, the punch 2 is moved in the axial direction. In the process of applying force to the deforming punch 2 as the metal flows into the side cavity, pit 4 is removed from the workpiece, moving it in the same direction as the punch 2. As a result, the metal flows in two directions filling the cavity of the lateral process and cavity. formed by the counter-punching unit as it is extracted, which, when shaping products with lateral processes, eliminates the formation of stagnant zones and the occurrence of clamps when expanding the product range. Example. Stamp with a split matrix has two cavities. One under the process with a diameter of 65 mm and the other, located on the same level as the main one, with a diameter of 65 mm. Extrusion is made from blanks with a diameter of 83 mm (container diameter is 85 mm steel 20 GOST 1О5О-74 and steel 12x1 МФ GOST 20072-74. Counterpuns diameter is 65 mm with a sphere radius 7 34 butts 180 mm. Depth of the counterspan 3.5 mm. Depth During the experiments, the punch displacement varies from 1Q mm to 15 mm. The length of the obtained process is longer than the critical length. The clamps are not detected. Cross-sections are good. Using the proposed method of transverse extrusion, in comparison with the known method, products with lateral growths are obtained. Kami, which can be at the level of the end without defects (clips). Formula of the invention The method of transverse extrusion, in which the butt end of the workpiece is affected by a punch, moving it in the axial direction, and at the same time moving the counter-panson in the same direction, expanding the nomenclature of the manufactured products, preliminarily the counterpunson is inserted into the workpiece, forming a cavity in it. Sources of information taken into account during the examination 1. More pressing of forgings in dies Alami, ENIKMASH, Voronezh, 1967, p. 12-2O.

2. USSR author's certificate for application No. 2128903/27,. cl. B 21 K 21/08, -28.04.75.

FIG. 2