A kind of preparation method of elastic wheel core

Abstract

A method for preparing an elastic wheel core, belonging to the technical field of elastic wheel production technology, the method comprises 1) opening a continuous casting slab with a larger diameter to obtain a rolled slab with a smaller diameter; 2) annealing the rolled slab Finally, cut the material to obtain the feeding billet required for the production of each wheel core; 3) heat the feeding billet; 4) after the feeding billet is upset, it is forged by open die forging, and after the forging is completed, it is punched to obtain the forming blank ; 5) The finished product of the wheel core is obtained after shot peening, heat treatment, sampling inspection, processing, finished product inspection, and painting are carried out on the forming blank; the beneficial effect of the present invention is that the present invention adopts a new forging method, so that the product yield is improved, and the product yield is eliminated. The rough machining before heat treatment is optimized, the process is optimized, the production cycle is shortened, the cost of forging billet is saved, the utilization rate of the billet is improved, the raw material is saved, the manufacturing cost is saved, and the competitiveness of the enterprise is improved.

Description

technical field [0001] The invention relates to the technical field of elastic wheel production technology, in particular to a method for preparing an elastic wheel core. Background technique [0002] Elastic wheels are usually a combination of wheels used for low-floor urban trams. Due to their low noise and low cost, they are adopted by more and more urban ground transportation, such as figure 1 As shown, the elastic wheel includes a tire 1, an elastic body 2, a wheel core 3 and a gland 4. The inner side of the tire 1 is connected to two elastic bodies 2, one of which is connected to the outer edge of the wheel core 3, and the other An elastic body 2 is connected and fixed with the bottom of the wheel core 3 through the gland 4. The wheel core 3 of the elastic wheel is opposite to the general wheel parts, and the outer diameter is between 400-500mm. The central hole is characterized by small size and light weight, usually about 40 kg, complex shape, usually deep basin sha...

AI Technical Summary

Problems solved by technology

[0004] 1) Due to the small size and light weight of the wheel core, the continuous casting round billet or die-cast ingot produced by conventional wheels cannot guarantee the production requirements of the forging ratio ≥ 4 of the product, and the steel ingot needs to be re-forged before forging, and the billet re-forging cost Usually higher, 2,000 yuan / ton, which increases production costs and reduces the market competitiveness of enterprises

[0005] 2) The shape of the elastic wheel core is usually complex, such as: usually a deep basin flange structure, such a complex shape, usually adopts free forging and general forming methods, and it is impossible to process the complex shape

Generally, forging is used to form a round cake-shaped blank. The yield rate of this method is very low. Taking the AT608 elastic wheel core as an example, the weight of the finished wheel core is 38 kg, and the weight of the input material is 165 kg. In addition, because the processing allowance is very large, to ensure the quality of heat treatment of the product, it is necessary to carry out rough machining before the heat treatment of the wheel core, and each piece needs to increase the processing cost by 600 yuan

[0006] 3) Due to the complex structure of the wheel core, it is not easy to control the external dimensions by free forging, and the pass rate of forging by free forging is very low. For example, for AT608 elastic wheel core, less than 50% of the first batch of forgings are qualified, and 25 forged pieces are qualified in size only 12 pieces

Images