The method of manufacture glasses with flanges

 

The invention relates to the processing of metals by pressure and can be used in forging shops of metallurgical and machine-building plants in the manufacture of automobile wheels and the like products. After preparation of the original piece produce the formation of intermediate semi-finished product in the form of a bowl shaped bottom wall thickening in the transition wall in the bottom, limited to the inside of the bowl surface of rotation, an annular protrusion on the outer face of the bottom flange on the end wall. While specified annular ledge inside perform cone. The flange on the end wall form an Annex to this end axial force with increasing wall thickness at the end with her constant diametrical sizes on the inside. Then do the final shaping of the workpiece, in which the wall of the intermediate semi-finished product from the inside to distribute in the area adjacent to its end. You get a cone with the apex directed toward the bottom of the bowl. The angle of taper of the annular protrusion of the intermediate semi-finished product and the angle of taper of the wall of the workpiece in the zone adjacent to its end face, which are selected from the above ranges. The result is improved quality of finished products. 3 Enie relates to the field of metal forming and can be used in forging shops of metallurgical and machine-building plants in the manufacture of automobile wheels and the like products.

A known method of manufacturing products of the type wheels, including the preparation of the original piece, forming an intermediate semi-finished product in the form of a bowl, education annular ledge and the ridge on the bottom of the bowl, forming on the Cup flange and the disk part with a relief, the formation of the rim and the other flange of an annular ledge, and thermal and mechanical processing (Patent and No. 2063838, CL 21 To 1/28, publ. 1996).

The disadvantage of this method is the complexity of die tooling, and low productivity due to the need to implement a large number of process steps of processing by pressure.

A known method of manufacture glasses with the two flanges, for example, road wheels, including the preparation of the original piece, the formation of intermediate semi-finished product in the form of a bowl shaped bottom wall thickening in the transition wall in the bottom, limited to the inside of the bowl is conical surface, an annular protrusion on the outer face of the bottom flange and the flanged on the wall, the final shaping of the workpiece, the radial distribution of the annular protrusion on the bottom of the bowl in the other flange, heat treatment and mechanical processing (Patent RF №2135320, CL 21 To 1/28, publ. 1999 - prototype).

is a rather rational structure of the fibers during deformation, what affects the strength characteristics under conditions of cyclic loading during operation.

The proposed method for the manufacture of glasses with two flanges, for example, vehicle wheels includes the preparation of the original piece and the formation of intermediate semi-finished product in the form of a bowl shaped bottom wall thickening in the transition wall in the bottom, limited to the inside of the bowl surface of rotation, an annular protrusion on the outer face of the bottom flange on the end wall. Then finally form the billet radial distribution of the annular protrusion on the bottom of the bowl to the second flange.

The annular ledge inside perform cone. When forming the intermediate semi-finished flange on the wall of the form, applying axial force to its end, by increasing the wall thickness at the end with her constant diametrical sizes on the inside. When the final shaping of the blank wall in the area adjacent to its end, from the inside distribute on a cone with the apex directed toward the bottom of the bowl. Then conduct the heat treatment and mechanical processing.

The proposed method differs from the prototype in that the annular protrusion is provided with a tapered inside, the formation of the intermediate polki near the end when her constant diametrical sizes on the inside, and when the final shaping of the blank wall in the area adjacent to its end, from the inside distribute on a cone with the apex directed toward the bottom of the bowl, while the geometrical parameters of the Cup and the semi-finished product is chosen from the ranges

45° and

30°,

whereandrespectively the angles of taper of the annular ledge and the wall in the area adjacent to its end.

Thickening in the transition wall in the bottom is limited to the inside of the bowl is conical surface with a cone anglein the range of 30 to 60° or toroidal surface whose dimensions are defined by dependence

1,2 SR2HTo,

where R is the radius of the generatrix of the torus,

HToand S are respectively the thickness of the bottom wall in the area adjacent to the thickening.

The technical result of the invention is improving the quality of finished products due to the rationalization of the structure of the fibers during deformation and, spoluchennya so the glasses have minimal machining tolerances, that allows to reduce the consumption of expensive materials of the workpieces and, consequently, the cost of the finished products.

The invention is illustrated by drawings, which show:

in Fig.1 - the formation of an intermediate material;

in Fig.2 - the final shaping of the glass, a variant with a conical thickening in the transition wall in the bottom;

in Fig.3 - the same, an option with a thickening at the transition wall in the bottom, limited toroidal surface.

EXAMPLES

1. Made sport wheel size 13×19aluminum alloy type 6061. Original blank 1 (Fig.1) size500 mm × 110 mm weight 60 kg was heated and placed in the cavity of the stamp 2 with shaped ejector 3 and the plug 4. Applied deforming force P and backward extrusion of the formed cake mix in a bowl height H=400 mm, outside diameter D1=505 mm and wall thickness 5 S=12 mm

At the same time as the axial force acted on the open end of the Cup, the flange 6 is formed by increasing the thickness of the wall 5 at the end of SF=25 mm, while maintaining the internal diameter of D2constant.

At vneshnei bottom 8 of the wall 5 has performed thickened. Thickening 9 limited inside surface of the rotation.

The angle of the taper surface of the circular protrusion 7=25° (Fig.2). When the final shaping of the finished product thickness of the wall of the internally distributed to the diameter D3=501 mm on a cone with cone angle=15°, which helped to form the flange rear flange 10 wheels with a diameter of D4=526 mm Thickening 9 is limited to the inside conical surface with a cone angle=55°. When touching the end of the thickened portion 11 and a conical part 12 of the plug 4, respectively, with the flange 10 and thickening 9 continued final shaping. The glass is moved along the axis, deforming the annular protrusion 7. When this metal is displaced in the radial direction, forming a second flange front flange 13 of diameter D5=528 mm and then were heat treatment and mechanical processing.

2. Made the same wheel 13”×19”, but from an alloy system magnesium-lithium. Thickening 9 (Fig.3) is limited to the inside of a toroidal surface with a generatrix radius R=25 mm, as the punch 4 is made of a toroidal portion 14 of the corresponding sizes. The thickness of the bottom of the glass in the WMD thickening, S=15 mm, Other dimensions, respectively, as in example 1.

Thus, the proposed method can improve the quality of finished products, mainly automobile wheels sports cars, thanks to the rationalization of the structure of the fibers during deformation and to prevent cracking during formation of ribs. The latter is particularly important in the production of alloys of the system magnesium-lithium.

Claims

1. The method of manufacture of glasses with two flanges, including the preparation of the original piece, the formation of intermediate semi-finished product in the form of a bowl shaped bottom wall thickening in the transition wall in the bottom, limited to the inside of the bowl surface of rotation, an annular protrusion on the outer face of the bottom flange on the end wall, the final shaping of the workpiece radial distribution mentioned annular protrusion on the outer face of the bottom intermediate semi-finished product to obtain a second flange, heat treatment and machining, characterized in that when generating the intermediate semi-finished annular protrusion on the outer face of the bottom inside perform cone with cone anglewhile the value of the angle of taperannular ledge intermediate semi-finished product and the angle of the taperthe wall of the workpiece in the zone adjacent to its end face, which are selected from the following ranges:

45°;

30°.

2. The method according to p. 1, characterized in that it is designed for the manufacture of car wheels.

3. The method according to any of paragraphs.1 and 2, characterized in that the surface of the rotation thickening of the intermediate semi-finished product when moving it to the wall at the bottom form a cone with cone angle, the value of which is chosen in the range from 30 to 60°.

4. The method according to any of paragraphs.1 and 2, characterized in that the surface of the rotation thickening of the intermediate semi-finished product when moving it to the wall at the bottom �8804.gif" border="0">R2Hto,

where Ntothe thickness of the bottom of the glass in the zone adjacent to the thickening;

S - wall thickness of the glass in the zone adjacent to the thickening.



 

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