SU908510A1

SU908510A1 - Cast-forging method

Info

Publication number: SU908510A1
Application number: SU792802985A
Authority: SU
Inventors: Владимир Иванович Власенков; Леонид Капитонович Каймасов; Юрий Петрович Кобзев; Иван Григорьевич Ракитин; Анатолий Иосифович Ровкин
Priority date: 1979-07-30
Filing date: 1979-07-30
Publication date: 1982-02-28

Description

() СПОСОБ ШТАМПОВКИ ЖИДКОГО МЕТАЛЛА() METHOD FOR PUNCHING LIQUID METAL

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Изобретение относитс к литейному производству и может быть использовано при штамповкэ изделий из жидкой стали, чугуна, цветныхметаллов и сплавов.The invention relates to foundry and can be used in stamping products from liquid steel, cast iron, nonferrous metals and alloys.

Известен спрсоб штамповки жидкого металла, включающий защиту рабочей поверхности матриц пресс-формы, заливку металла, введение пуансона в полость пресс-формы до сопрокосновени с зеркалом расплава и создание пуансоном высокого давлени на жидкий металл до окончани его первичной кристаллизации 1 .A liquid metal stamping process is known, which includes protecting the working surface of the mold dies, pouring the metal, introducing the punch into the mold cavity to match the melt mirror, and creating a high pressure punch on the liquid metal until its primary crystallization 1.

Недостатком известного способа вл етс то, что изготовление качественных изделий, особенно высоких по направлению прессован и , невозможно потому, что заливка металла ведетс с большой высоты и брызги окисленного металла попадают на стенки матрицы , в результате чего поверхность издели получаетс недостаточно чистой.The disadvantage of this method is that the manufacture of quality products, especially high in the direction of extrusion, is impossible because the pouring of metal is from a great height and splashes of oxidized metal fall on the walls of the matrix, resulting in the surface of the product is not clean enough.

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Цель изобретени - повьшение качества отливок.The purpose of the invention is to improve the quality of castings.

Поставленна цель достигаетс тем, что в известном способе штамповки, включающем защиту рабочей поверхнос-. ти матриц пресс-формы, заливку металла , введение пуансона в полость прессформы до соприкосновени с зеркалом расплава и создание пуансоном высокого давлени на жидкий металл до окончани его первичной кристаллизации , перед заливкой металла на дно матрицы устанавливают расплавл емую трубку, через которую осуществл ют подачу металла.The goal is achieved by the fact that in a known method of punching, including the protection of the working surface. mold molds, metal pouring, inserting a punch into the mold cavity before contacting the melt mirror, and creating a high pressure punch on the liquid metal before the end of its primary crystallization, before pouring the metal to the bottom of the matrix, set the molten tube .

В качестве металла трубки используют штампуемый металл.As the metal tube used stamped metal.

На чертеже изображена схема установки и заливки жидкого металла в полость пресс-формы.The drawing shows a diagram of the installation and pouring of liquid metal into the cavity of the mold.

Claims

The melted tube 1 through the sleeve 2, which forms a cavity for introducing the punch 3 and pouring the liquid metal, is mounted on the plane of a rotary shaft k so that the working space of the matrices 5 and 6 is completely blocked. Through the movable tray 7, liquid metal is poured in, which melts the lower support part of the tube and enters the matrix, filling it from below without splashes and splashes. The level of the liquid metal in the tube is somewhat above its level in the matrix during the whole filling time and the heated melted part of the tube is always below the level of the metal in the matrix. In this way, the working surface of the die is protected from splashing of liquid metal upon it during pouring. PRI me R. Experimental work is being carried out on the development of the technology for the manufacture of castings of gears with a tapered 22kg spike from ZOL steel using the method of liquid stamping. Structurally, the height of the fall of the liquid metal on the plane of the pusher is 320 mm. When metal is poured without a tube, its splashes in the form of oxidized balls with a diameter of 0.5 to 2.3 mm hang on the walls of the matrix and the surface of the casting is of poor quality with corules and spas. After installing the tube and pouring metal through it, the working surface of the finished gear casting has no visible defects. The use of the proposed method of stamping a liquid metal in comparison with the known methods provides the following advantages: the possibility of simplifying the structural solution of the mold blocks and dies for stamping a liquid metal; the possibility of obtaining high-quality products with high surface finish without further machining, which is especially important for maintaining the fine-grained, more durable surface of the casting; reduction (cost of products due to the complete elimination of machining operations or reducing their number to fine-tuning (grinding, super-finishing, running, etc.); increasing the service life of products by increasing their quality. Formula of the invention 1. A method of stamping a liquid metal, including protecting the working surface of the mold press mold, pouring the metal, inserting the punch into the mold cavity until it contacts the melt mirror and creating a high pressure punch on the liquid metal until its primary end crystallization, characterized in that, in order to improve the quality of the slides, before pouring the metal on the bottom of the matrix, a molten tube is installed through which the metal is fed.

2. The method according to claim 1, is also distinguished by the fact that a punchable metal is used as a tube material. Sources of information taken into account during the examination 1. A. Batyshev, et al., Punching of a liquid metal. M., Mechanical Engineering, 1979.