A method of manufacturing wheels

 

(57) Abstract:

The invention relates to the field of metal forming and can be used in the manufacture of wheels, including motor vehicles. The preheated billet rebuff, and then deform in several transitions with the formation of the rim and hub portions of the wheels with the specified dimensions. In the beginning of the first transition of the deformation upset billet in it form a Central hole. In the process of deformation of the workpiece through flexible receive the semi-finished product in the form of a conical Cup, produce flanging last, move it to the bottom part of the stamp at the same time with a combined extrusion and swaging. At the last transition of the deformation perform crimping and calibration rim part and doormouse hub portion of the semi-finished product. Then the semi-finished product is subjected to thermal and mechanical processing. The result is the reduced mass of the initial procurement and improving the structure of the finished product. 5 C.p. f-crystals, 3 ill.

The invention relates to the field of metal forming and can be used in the manufacture of wheels, including automotive Tran is inanime hub part, located closer to one of the wheels, including the draught of a cylindrical workpiece, preliminary and final forming (Forging and stamping nonferrous metals Handbook, M., mechanical engineering, 1971).

The disadvantages of this method is the considerable complexity of the product, its high intensity and high energy process.

A known method of manufacture of wheels of vehicles, comprising a deformation of the original piece in several passages in the plug tool with the formation of the rim and hub parts, while in the latter the transition performs the Central hole, as well as thermal and mechanical processing (Application Germany 3039985, CL 21 D 53/56, publ.1981)

The disadvantages of this method are high metal products, low quality, and energy intensity of the manufacturing process.

Closest to the present invention to the technical essence and the achieved when using the technical result is the method of making wheels of vehicles, comprising a deformation of the original piece in two transitions, the first of which is formed into a semi-finished product in the form of a con is part of the stamp with subsequent extrusion, obtaining rim and hub portions, and the second transition is carried out in the stamp with a vertical connector matrix crimping of the obtained semi-finished product, as well as with Central holes, thermal and mechanical processing (RF Patent 2042467, IPC 6 In 21 D 53/26, publ. 1995).

The disadvantages of this method is the high energy intensity of the process, low mechanical properties, high intensity products.

The problem to which the invention is directed, is to create more efficient technologies, resulting in lower labor, energy and metal consumption.

Technical result achieved when using the present invention is that the above parameters, labor, energy and metal consumption is improved by reducing the mass of the initial billet, reducing the area of the projection in the process of deformation and improve the structure of the finished product.

Tasked with achieving the mentioned technical result is solved in that in the known method of manufacture of wheels of vehicles, comprising draught of the original piece, the formation of a Central hole, the deformation in several perennou processing, in the process of deformation of the workpiece through flexible receive the semi-finished product in the form of a conical Cup, then make the move it to the bottom part of the stamp, crimping and combined extrusion, characterized in that the carry out preheating of the original piece, the Central hole is mounted to the workpiece is performed in the beginning of the first transition of its deformation, after the flexible workpiece upon receipt of the semifinished product in the form of conical cups produce flanging the latter, combined extrusion of semi-finished product is produced simultaneously with moving it to the bottom part of the stamp, and the last transition of the deformation perform crimping and calibration rim part and doormouse hub portion of the semi-finished product.

Another feature of the method lies in the fact that the crimping of the semi-finished product at the last transition can be performed at room temperature.

Firmware is the Central part of the billet in the beginning of the first transition provides a reduction of the area of the projection of the workpiece, thereby reducing the clamping for the implementation of subsequent flanging of the workpiece and moving it to the area of the bottom part, and, therefore, leads to a decrease of e is t pressure side inserts matrix due to the elastic properties of the material of the semi-finished product formed by the undercut in the wall of the Cup, over its hub part (in the prototype this is achieved subsequent mechanical processing), which reduces the metal stamping wheel in obtaining the required dimensions of the finished product. Education "undercut" also leads to the fact that the line currents (metal fiber) coincide with lines of the form of the finished product, which improves the internal structure of the wheel and allows you to increase the resistance of the product cyclic loads.

Conducting crimp prefabricated at the last transition at room temperature stamp and prefabricated allows to reduce the energy intensity of the process, increase tool life, improve working conditions.

The invention is illustrated in the drawings, which depicts the basic operation of the technology wheels mainly for automotive vehicles.

In Fig. 1 shows a process diagram of the first transition in primary and intermediate points of deformation.

In Fig.2 shows a process diagram of the first transition in the intermediate and final moments of the deformation.

In Fig. 3 shows a process scheme of the second transition in the initial and final moments of strain is practical ingot. Then pre-heated to a temperature of deformation of the original billet is placed over the bottom part of the pre-stamp in the matrix 2 and the punch 3 perform the Central hole (Fig.1).

Upon further movement of the punch down on the intermediate stage produces a bending followed by crimping the lower part 1. At the final stage of the first transition moves the workpiece in the bottom part of the stamp and closing the upper and lower halves of the stamp carry out the crimping of the side walls of the workpiece, followed by forming the bottom and the hub portions of the semi-finished product 4 due to the combined extrusion with the size closest to a given (Fig.2).

The resulting intermediate product on the target transition is placed in the bottom half of the final stamp with a vertical connector of matrices 5. When lowering the punch 6 under the action of lateral forces inserts 7 matrix begin to shift, by crimping of the rim part of the semi-finished product. However, due to the elastic properties of the material of the semi-finished product is the formation of "undercut" in the wall of the Cup over his hub part. When fully closing the upper and lower halves of the stamp is Govorkova hub part and receiving stamping wheels: 22.5 x 9. Upsetting of a cylindrical billet made on figure strikers. Prior to stamping set billet was heated in a furnace to a temperature of 380oWith the first transition with the formation of the bottom and wheel parts and firmware of the Central hole in the workpiece was carried out on a hydraulic press force 5000 TC, receiving semi-finished product in the form of a conical Cup with a Central hole. Final shaping with the crimping of the side of the semi-finished product was carried out on the press force of 3000 t at room temperature stamp and semi-finished product, getting the product weight 50 kg.

The product is manufactured in a known manner, of a similar size has a mass of 60 kg, use a press with a force of 10,000 cu on the first transition and 7500 TC on the second, while the semi-finished product before the final forging is heated to a temperature of 380oC.

As a result of application of the proposed method in an industrial environment have been reduced: the effort by 23%, energy consumption by 18%, the metal billet by 12%, and the mechanical strength increased by 16%.

1. The method of manufacture of the wheels, including the draught of the original piece, the formation of a Central hole, the deformation in several microscopic processing, in the process of deformation of the workpiece through flexible receive the semi-finished product in the form of a conical Cup, then make the move it to the bottom part of the stamp, crimping and combined extrusion, characterized in that the carry out preheating of the original piece, the Central hole is mounted to the workpiece is performed in the beginning of the first transition of its deformation, after the flexible workpiece upon receipt of the semifinished product in the form of conical cups produce flanging the latter, combined extrusion of semi-finished product is produced simultaneously with moving it to the bottom part of the stamp, and the last transition of the deformation perform crimping and calibration rim part and doormouse hub portion of the semi-finished product.

2. The method according to p. 1, characterized in that the crimping of the rim part of the semi-finished product is carried out at room temperature.

3. The method according to any of paragraphs.1 and 2, characterized in that the crimping of the rim part of the semi-finished product is carried out in the stamp and the matrix, which is made with a vertical connector.

4. The method according to p. 3, characterized in that use a matrix with side inserts arranged to move in the process of deformer the COC form firmware.

6. The method according to any of paragraphs.1-5, characterized in that it is designed for the manufacture of wheels of automotive vehicles.

 

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