SU818697A1

SU818697A1 - Method of preparing shaped section for drawing

Info

Publication number: SU818697A1
Application number: SU792751026A
Authority: SU
Inventors: Юрий Николаевич Суровов; Валентин Иванович Шекалов; Владимир Сергеевич Григорьев
Original assignee: Предприятие П/Я А-3700
Priority date: 1979-04-12
Filing date: 1979-04-12
Publication date: 1981-04-07

Description

1one

Изобретение относитс к обработке металлов , а именно к производству, фасонных профилей методом волочени из профилированного подката.The invention relates to the processing of metals, namely the production of shaped profiles by the method of drawing from a shaped tack.

Известен способ подготовки фасонных профилей к волочению, включающий гор чую прокатку, удаление окалины, нанесение подсмазочного сло и острение концов подката на ковочных вальцах. Острение при этим способе осуществл ю,т за трип ть проходов в фасонных калибрах сложной конфигурации 1.There is a known method of preparing shaped profiles for drawing, including hot rolling, descaling, application of a lubricant layer and sharp tackle ends on forging rollers. The sharpness with this method is carried out, for triptyps in shaped gauges of complex configuration 1.

. Недостатками этого способа вл ютс трудоёмкость и низка производительность, вызванна повышенным количеством переходов дл острени переднего конца подката , сложностью изготовлени оснастки- штамповых сегментов ковочных вальцев, сложность унификации штамповых сегментов по всему сортаменту фасонных профилей .. The disadvantages of this method are laboriousness and low productivity, caused by an increased number of transitions for sharping the front end of the roll, the complexity of manufacturing snap-die segments of forging rollers, the difficulty of unifying die segments throughout the entire range of shaped profiles.

Целью изобретени вл етс увеличение производительности и упрощение технологического процесса острени концов фасонных профилей при подготовке их к волочению.The aim of the invention is to increase the productivity and simplify the process of sharping the ends of the shaped profiles in preparation for drawing.

Поставленна цель достигаетс тем, что операцию острени осуществл ют перед прокаткой путем плавного уменьшени площади поперечного сечени конца сортовой заготовки одним из известных способов , например ковкой, до величины, не превышающей площади поперечного сечени готового профил , на длине не более длины участка захвата при волочении. С целью обеспечени устойчивости при прокатке заостренного конца заготовки в калибрах прокатного стана острению подвергают задний по ходу прокатки конец заготовки . Применение данного способа целесообразно осуществл ть при наличии на волочильных станах устройств дл принудительной задачи профил в волоку.The goal is achieved by the fact that the sharpening operation is carried out before rolling by gradually reducing the cross-sectional area of the end of the billet by one of the known methods, for example, forging, to a value not exceeding the cross-sectional area of the finished profile, over a length of the gripping section during drawing. In order to ensure stability when rolling the pointed end of the billet in the calibres of the rolling mill, the rear end of the billet is subjected to sharpness during rolling. The application of this method is advisable to carry out if there are devices on the drawing mills for the forced task of a die profile.

Способ по сн етс фиг. 1-3, где показано изменение поперечного сечени заостренного конца заготовки по проходам (пунктирные линии) и конфигураци основного сечени профил остреного конца заготовки (сплошные линии).The method is explained in FIG. 1-3, which shows the change in the cross section of the pointed end of the workpiece along the aisles (dashed lines) and the configuration of the main section of the profile of the sharp end of the workpiece (solid lines).

Предложенный способ по сн етс также примером его осуществлени при изготовлении типового фасонного профил «стойка посредством волочени из гор чекатаной заготовки круг 12 мм по ГОСТ 2590-57.The proposed method is also illustrated by an example of its implementation in the manufacture of a standard profile profile by drawing from a hot-rolled billet a circle of 12 mm according to GOST 2590-57.

Claims

Preparation of the profile for drawing was carried out by performing the following sequence of operations: drilling the ends of the workpieces at a length of 100 mm with a smooth transition from the workpiece diameter to a diameter of 5 mm, heating the workpieces for rolling up to 1150 ° C, hot rolling the profile in two passes according to the scheme shown in the drawings; shot blasting of a shaped strip for drawing in order to remove scale, applying graphite grease before drawing, drying. In the gauges of the rolls of the rolling mill billet was given the end opposite the pointed. Due to the fact that the varietal billet was preceded by rolling in the mill rolls, along with the formation of the shaped profile of the rolled stock, it was necessary to shape its pointed end. As a result, a shaped blank for drawing was obtained, and the pointed end with a smooth transition from the profile of the main section to the “circle” profile. Sharpened in this way, the billet was loosely set by the pusher into the fiber and securely held by the gripping jaws of the drawing mill. Formula from gaining 1. A method of preparing shaped profiles for drawing, mainly with 5 10 115 20 25 forced task of the workpiece in the die, including hot rolling, cleaning the workpiece from scale, applying a sub lubricant layer and sharp ends, characterized in that The productivity and simplification of the technological process, the drilling is carried out before rolling by smoothly reducing the cross-sectional area of the end of the billet to a value not exceeding the cross-sectional area of the finished product. Phil, at a length not exceeding the length of the gripping section when drawing.

2. A method according to claim 1, characterized in that the rear end of the billet is subjected to sharpness during rolling.

3. A method according to claim 1, characterized in that the isting is made by forging. Sources of information taken into account in the examination 1. Vydrin V. I., et al. Production of high-precision asonic profiles. M ,, etallurgi, 1977, p. 39