SU897373A1

SU897373A1 - Method of producing ring forgings

Info

Publication number: SU897373A1
Application number: SU802904806A
Authority: SU
Inventors: Виктор Дмитриевич Арефьев; Эдуард Львович Рогожин; Георгий Степанович Рябцев; Александр Юрьевич Петунин
Original assignee: Предприятие П/Я А-3681; Предприятие П/Я В-8772
Priority date: 1980-04-01
Filing date: 1980-04-01
Publication date: 1982-01-15

Description

Изобретение относится к обработке металлов давлением, а именно, к способам изготовления кольцевых поковок.The invention relates to the processing of metals by pressure, and in particular, to methods for manufacturing annular forgings.

Известен способ изготовления кольцевых профильных поковок, заключающийся в раскатке осаженной и прошитой 5 заготовки плоским бойком на профилированной оправке [1J.A known method of manufacturing annular shaped forgings, which consists in rolling up the besieged and stitched 5 workpiece flat striker on a profiled mandrel [1J.

Однако этот способ не позволяет получать ковкой кольцевых поковок двутаврового профиля с расположением по- ¹⁰лок по наружному и внутреннему диаметI рам.However, this method does not allow forging ring forgings of an I-profile with an arrangement of ¹⁰ flanges along the outer and inner diameters I.

Известен способ изготовления коль цевых поковок двутаврового профиля с расположением полок по наружному и внутреннему диаметрам, включающий изготовление полой заготовки путем раскатки на оправке С2).A known method of manufacturing annular forgings of an I-profile with the location of the shelves on the outer and inner diameters, including the manufacture of a hollow billet by rolling on mandrel C2).

Однако этот способ также не позволяет изготавливать поковки с двутав ровым профилем, полки которого рас положены по внутреннему и наружному диаметрам с минимальными напусками.However, this method also does not allow manufacturing of forgings with a double tee profile, the shelves of which are arranged along the inner and outer diameters with minimal overflows.

Для получения указанного профиля необходимо в поковку закладывать напуски, что приводит к повышенному расходу металла и увеличению трудоемкости механической обработки.To obtain the specified profile, it is necessary to lay in forgings forgings, which leads to an increased consumption of metal and an increase in the complexity of machining.

Целью изобретения является увеличение коэффициента использования металла и снижение трудоемкости изготовления изделий за счет исключения напусков поковок.The aim of the invention is to increase the utilization of metal and reduce the complexity of manufacturing products by eliminating the forgings of forgings.

Эта цель достигается тем, что согласно способу изготовления кольцевых поковок двутаврового профиля с расположением полок по наружному и внутреннему диаметрам, включающему изготовление полой заготовки путем раскатки на оправке, предварительно кольцевую заготовку надрубают по периметру наружной и внутренней поверхностей на глубину, определяемую длиной полок профиля, а при раскатке отгибают разделенные части заготовки в противоположные стороны путем раскатки за3 897373 4 готовки первоначально на профильной, товка приобретает профиль двутавра 12 а затем на цилиндрической оправках.This goal is achieved by the fact that according to the method of manufacturing annular forgings of an I-profile with the location of the shelves on the outer and inner diameters, including the manufacture of a hollow workpiece by rolling on a mandrel, the annular workpiece is pre-cut along the perimeter of the outer and inner surfaces to a depth determined by the length of the shelves of the profile, and when rolling, the divided parts of the workpiece are bent in opposite directions by rolling out for 3 897373 4 cooking initially on the profile, the product acquires a double profile Avra 12 and then on cylindrical mandrels.

На фиг. 1 показана операция надрубки по внутренней поверхности заготовки; на фиг. 2 - то же, по на- у ружной; на фиг. 3 - раскатка заготовки на профильной оправке; на фиг. 4 раскатка заготовки на цилиндрической оправке.In FIG. 1 shows a notch operation on the inner surface of a workpiece; in FIG. 2 - the same as on the outside; in FIG. 3 - rolling blanks on a profile mandrel; in FIG. 4 rolling blanks on a cylindrical mandrel.

Способ осуществляется следующим 10 образом.The method is as follows 10.

Полую кольцевую заготовку 1 одевают на оправку 2, центрируют в ручье по боковым стенкам и выполняют надрубку заготовки по внутренней поверх- 1$ ности последовательными нажатиями плоского бойка 3 и кантовкой заготовки на оправке путем поворота ее вокруг своей оси. При надрубке оправка опирается на кронштейны 4. Глубина надруб-зд ки получаемого при этом профиля 5 заготовки определяется длиной полки профиля поковки. Затем заготовку надрубают по наружной поверхности в этом же ручье оправки при помощи топора 6.13 Надрубленную с обеих поверхностей заготовку с профилем 7 передают в ручей оправки 8 с клинообразным выступом, центрируют ее по выступу и осуществляют отгибание разделенных час- до тей заготовки путем раскатки под бойком 9 с клинообразным выступом, соответствующим выступу на оправке. При необходимости осуществляют раскатку заготовки в ручьях оправки и бойке с увеличивающимся углом конусности выступа. Полученную при этом заготовку с профилем 10 передают на гладкую оправку I 1 и раскатывают в размер под плоским бойком 3. В. результате заго- _<0 с расположением полок по наружному и внутреннему диаметрам.The hollow annular blank 1 is put on the mandrel 2, centered in the stream along the side walls, and the blank is cut on the inner surface by successive pressing of the flat striker 3 and the turning of the blank on the mandrel by turning it around its axis. When the notch, the mandrel rests on the brackets 4. The depth of the notch of the billet obtained in this case 5 is determined by the length of the shelf of the forging profile. Then, the workpiece is cut along the outer surface in the same mandrel stream using an ax 6.13. The workpiece with a profile 7, cut from both surfaces, is transferred to the mandrel stream 8 with a wedge-shaped protrusion, centered on the protrusion and the parts of the workpiece are bent by rolling under the striker 9 with a wedge-shaped protrusion corresponding to the protrusion on the mandrel. If necessary, the workpiece is rolled out in the brooks of the mandrel and the striker with an increasing angle of taper of the protrusion. The resulting workpiece with profile 10 is transferred to a smooth mandrel I 1 and rolled into size under a flat striker 3. B. As a result, zago- _<0 with the location of the shelves on the outer and inner diameters.

Предлагаемый способ позволяет повысить коэффициент использования металла и снизить трудоемкость изготовления изделия за счет приближения формы поковок к форме готовой детали и тем самым снизить объем последующей механической обработки.The proposed method allows to increase the utilization of metal and reduce the complexity of manufacturing the product by approximating the shape of the forgings to the shape of the finished part and thereby reduce the amount of subsequent machining.

Claims

The invention relates to the processing of metals by pressure, in particular, to methods for producing ring forgings. A known method of manufacturing annular shaped forgings, consisting in rolling a deposited and stitched workpiece with a flat striker on a profiled mandrel til. However, this method does not allow forging ring forgings of a double profile with an external and internal diameter of the shelves. There is a known method for producing ring forgings of an I-profile with external and internal diameters of the shelves, including the manufacture of a hollow billet by rolling on a mandrel 23. However, this The method also does not allow making forgings with an I-profile, the shelves of which are located on the inner and outer diameters with minimal overlaps. To obtain the specified profile, it is necessary to lay overlaps in the forging, which leads to an increased consumption of metal and an increase in the complexity of machining. The aim of the invention is to increase the utilization rate of the metal and reduce the labor intensity of manufacturing the products by eliminating the forgings of the forgings. This goal is achieved by the fact that according to the method of manufacturing ring forgings of an I-beam profile with the location of the outer and inner diameters, including the manufacture of a hollow billet by rolling on a mandrel, a pre-annular billet is cut along the perimeter of the outer and inner surfaces to a depth determined by the length of the profile flanges, and when rolling, bend the separated parts of the workpiece in opposite directions by rolling the workpiece initially on the profile, and then on the cylindrical mandrel Oh. FIG. Figure 1 shows the cutting operation along the inner surface of the workpiece; in fig. 2 - the same, on the outside; in fig. 3 - rolling of the workpiece on the profile mandrel; in fig. 4 rolling billet on a cylindrical mandrel. The method is carried out as follows. A hollow annular workpiece I is put on the mandrel 2, centered in the stream along the side walls, and the workpiece is punched on the inner surface by successive pressing of the flat die 3 and turning the workpiece on the mandrel by turning it around its axis. When punching, the mandrel rests on the brackets 4. The punching depth of the billet produced by this profile 5 is determined by the length of the flange of the forging profile. Then, the workpiece is cut along the outer surface in the same stream of the mandrel with the help of an ax 6. The workpiece with profile 7, notched from both surfaces, is transferred to the hand-held mandrel 8 with a wedge-shaped protrusion, centered on the protrusion and bending of the separation parts of the workpiece by rolling under the striker 9 s wedge-shaped protrusion corresponding to the protrusion on the mandrel. If necessary, the rolling of the workpiece in the streams of the mandrel and the striker with an increasing angle of taper of the protrusion is especially important. The resulting blank with a profile 10 is transferred to a smooth mandrel 11 and rolled in size under a flat striker 3. As a result, the blank acquires a profile of an I-beam 12 with the location of the shelves in outer and inner diameters. The proposed method makes it possible to increase the utilization rate of the metal and reduce the laboriousness of manufacturing the product by bringing the forgings shape closer to the shape of the finished part and thereby reducing subsequent machining. Claim method The production of ring forgings of an I-beam profile with the location of the outer and inner diameters of the shelves, including the manufacture of a hollow billet by rolling on a mandrel, characterized in that, in order to increase the rate of use of the metal and reduce the laboriousness of the manufacture of products by eliminating the forgings of the forgings, the annular billet is cut along the perimeter of the outer and inner surfaces to a depth determined by the length of the flanges of the profile, and when rolled out it is bent over selected parts of the workpiece in opposite directions by rolling the workpiece initially on the profile, and then on cylindrical mandrels. Sources of information taken into account during the examination 1. USSR author's certificate No. 616030, cl. B 21 J 5/00, 1975.

2. USSR author's certificate number 416142, cl. B 21 J 1/04, 970 (prototype).