The method of manufacture glasses with flanges

 

(57) Abstract:

The invention 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. The proposed method of manufacture glasses with flanges, such as car wheels, includes preparation of the original piece, the formation of backward extrusion of the intermediate semi-finished product in the form of a bowl with the transition from the wall to the bottom and annular ledge on the back side of the latter with the formation at the final stage of extrusion flange around the perimeter of the end wall of the bowl. The transition from the wall to the bottom of the form in the form of a conical surface, the intersection of which with the wall of the bowl and the bottom part are guides conical surfaces of the cone with a slope forming the vertical angle. Then lead forming disk part with the formation of the relief, the final shaping is carried out with application of axial force to at least the upper flange, a conical surface on the inside of the Cup and the end of the annular protrusion, transforming it into the bottom flange. Then conduct the heat treatment and the mechanical is the reduction of metal consumption. 2 C.p. f-crystals, 3 ill.

The present invention 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 annular forgings, such as disks automobile wheels, which consists in upsetting the billet, pre-deformation to obtain a semi-finished product with an internal cavity, the configuration of which corresponds to the internal cavity of the finished forgings, and bottom flange with diameter equal to 0.96 and 1.0 times the diameter of the lower end of the finished forging, and the volume of the 1.04 - 1.16 volume of the finished forging, and the final deformation of obtaining the top flange (RF Patent N 2076013, B 21 J 5/00, 1995).

The disadvantage of this method is the complexity of die tooling, the use of which is possible only for one specific type of glasses with flanges type wheels and as a result, high initial cost and limited opportunities in the manufacturing and development process of manufacture glasses with the two flanges.

A known method of manufacturing products of the type wheels, including the preparation of original sahashi, but not less than the width of the flanges forming the backward extrusion of the intermediate semi-finished product in the form of a bowl with education at the final stage of extrusion flange around the perimeter of the end wall of the bowl, forming a disk part with the formation of the relief, the formation of the profile of the rim portion with the second flange, heat treatment and mechanical processing (Patent RF N 2069473, B 21 J 5/00, 1994, prototype).

The disadvantage of this method is the complexity of the tooling for the manufacture glasses for the subsequent manufacture of wheels, in addition, increased consumption of metal due to the fact that to receive the second flange, you must perform the annular ridge thickness greater than the size of the flanges. At high enough glasses or wide wheels this will entail an increase in the volume of the annular ridge, which will increase the consumption of the metal and increases the overall complexity of manufacturing.

Furthermore, the method has limited application, as it allows to produce wheels with an offset in the direction from the end face of the second flange.

The proposed method of manufacture glasses with flanges, such as car wheels, includes preparation of the original piece, the formation of reverse extrusion between the last education at the final stage of extrusion flange around the perimeter of the end wall of the bowl. The transition of the bottom wall are in the form of a tapered surface, the intersection of the conical surface with the wall of the bowl is conical guide surface of a cone with a base diameter equal to 1.01 - 1.05 diameter of the finished bottom of the flange and the intersection of the conical surface with the bottom part of the bowl is conical guide surface of a cone with a base diameter equal to at least the smallest diameter of the annular protrusion forming both conical surfaces inclined to the vertical at an angle of 30 - 45o.

Then lead forming disk part with the formation of the relief, the final shaping with application of axial force, at least to the upper flange, a conical surface on the inside of the Cup and the end of the annular protrusion, converting radial movement of the metal ring lug to the bottom flange. Then conduct the heat treatment and mechanical processing.

The education of the lower flange are supporting the annular protrusion on the plate concentric with the Cup hole, the diameter of which exceeds the minimum diameter of the annular ledge.

Final shaping lead to split the stamp.

The proposed method differs from prnce perform in the form of a conical surface of the conical intersection of the surface with the wall of the bowl is conical guide surface of a cone with base diameter, equal 1,01 - 1,05 diameter of the finished bottom of the flange and the intersection of the conical surface with the bottom part of the bowl is conical guide surface of a cone with a base diameter equal to at least the smallest diameter of the annular protrusion forming both conical surfaces inclined at an angle of 30 - 45oand when the final shaping of the applied axial force at least to the upper flange, a conical surface on the inside of the Cup and the end of the annular protrusion, converting radial movement of the metal ring lug to the bottom flange.

The education of the lower flange are supporting the annular protrusion on the plate concentric with the Cup hole, the diameter of which exceeds the minimum diameter of the annular ledge.

Final shaping lead to split the stamp.

The technical result is to simplify tooling for the manufacture of wheels and reducing the consumption of metal.

Thus obtained, the glasses of the two flanges have a minimum allowances for subsequent machining. Require a minimum of tooling, since the backward extrusion of the intermediate semi-finished product and its subsequent final four the installation of the parties, the lower part of the tool, the role of which performs a flat plate. This allows, especially for small-scale production, dramatically reduce the cost of the tool and to reduce the time required for the manufacture of prototypes and to reduce the consumption of metal, which significantly reduces the overall cost of the manufactured product.

Examples.

Magnesium alloy produced by any known method source procurement 1 size 480 x 180 weight 57,95 kg, which was heated and put in the matrix 2 (Fig. 1) with a shaped ejector 3 and the plug 4, applying a deforming force P, squeezing the reverse method of the metal workpiece 1 with the formation of the bowl with the wall 5 with the upper flange 6, the annular projection 7 and the transition zone 8 from the bottom 9 to the wall 5.

Transition zone 8 was formed in the form of a conical surface, the intersection of which with the wall 5 of the Cup and its bottom part 9 represented the guides conical surfaces of the cone with a slope forming A and B to the vertical at an angle and (for this example = = 35).

In the final shaping of the heated semi-finished product in the form of bowls has established an annular protrusion 7 on the surface of the plate O-O and o is remedy the Cup relative to the surface of the O-O and thereby deforming the annular protrusion 7. When this was done the conversion annular protrusion 7 in the lower flange 10 by radial movement of the metal is achieved proposed geometric relationships with end-stage diameter D1the base of the outer cone generatrix a-a (Fig. 2) was assumed equal to 530 mm when the diameter D of the finished bottom of the flange is equal to 514 mm, which corresponded to the D1= 1,031.

The diameter d1the base of the inner cone forming B-B was adopted equal to 440 mm at the smallest diameter of the annular protrusion is equal to 420 mm

In Fig. 3 shows the manufacture of the same Cup, but offset by the lower flange. Due to the fact that the education of the lower flange 10 was carried out, using the annular protrusion 7 on the plate 11 with more concentric hole with a diameter of d2exceed the diameter d of the annular ledge and was 440 mm

In the manufacture of wheels on the proposed method greatly simplified snap-in by using the same parts at different stages of stamping.

Were also made wheels on the prototype method.

However, due to the difficulty of obtaining in the method prototype offset flange, and 17% and it amounted to 65 kg.

Thus, the proposed method allows to simplify the tooling for the manufacture of wheels and reduce metal consumption by 12% to 17%, which reduces the cost of the wheels 15 to 20%.

1. The method of manufacture glasses with flanges, for example, road wheels, including the preparation of the original piece, the formation of backward extrusion of the intermediate semi-finished product in the form of a bowl with the transition from the wall to the bottom and annular ledge on the back side of the latter with the formation at the final stage of extrusion flange around the perimeter of the end wall of the bowl, forming a disk part with the formation of the relief, the final formation of the profile of the rim portion with the second flange by hand ledge in diameter, heat treatment and machining, characterized in that when forming the Cup backward extrusion on its inner surface, the transition of the bottom walls are in the form of a conical surface, the intersection of the conical surface with the wall of the bowl is conical guide surface of a cone with a base diameter equal 1,01 - 1,05 diameter of the finished bottom of the flange and the intersection of the conical surface with the bottom part of the bowl is conical guide surface of a cone with the diameter of the base is inclined to the vertical at an angle of 30 45owhen final shaping applied axial force at least to the upper flange, a conical surface on the inside of the Cup and the end of the annular protrusion, converting radial movement of the metal ring lug to the bottom flange.

2. The method according to p. 1, characterized in that the formation of the bottom flange are supporting the annular protrusion on the plate concentric with the Cup hole, the diameter of which exceeds the minimum diameter of the annular ledge.

3. The method according to p. 1, characterized in that the final morphology lead to split the stamp.

 

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FIELD: metal working.

SUBSTANCE: hard alloy matrix has casing, bushing pressed in the case and hard alloy insertion. Bushing has multifaced hole. Hard alloy insertion is composed by several sections made in form of trapezoidal-section prisms which have cut angles at their non-working edges. Number of sections corresponds to number of faces of item to be headed. Cuts of angles are made symmetrically to faces of working edge. Slits are made in several places of multifaced hole bushing at the ponts where faces cross each other.

EFFECT: improved resistance of matrix; simplified assembly.

3 cl, 1 dwg

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