Special casting mold for automobile semi-axle punching

Abstract

The invention discloses a special casting mold for automobile semi-axle punching. The casting mold is prepared from raw materials in parts by mass as follows: 40-50 parts of polypropylene, 1-3 parts of an antioxidant, 2-8 parts of methyl ethyl ketone, 10-14 parts of nano calcium carbonate, 20-24 parts of gel coats, 1-5 parts of cobalt water, 1-3 parts of ferrosilicon, 12-16 parts of 45 steel and 8-10 parts of mid-carbon ferromanganese. The special casting mold for automobile semi-axle punching has a good ratio, good casting density, uniform structure, high strength and high-temperature resistance, and the service life of the mold is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of automobile spare parts, and in particular relates to a special casting mold for stamping of automobile half shafts. Background technique [0002] The automobile half shaft is the main part of the rear axle of the car. During the operation of the car, the half bearing is subjected to various complex alternating stresses such as the weight of the entire body and cargo and the transmission torque. At present, when producing the car half shaft, the car half shaft is usually used The shaft forging die forging the workpiece. [0003] The stress of the automobile semi-axis forging die: it bears both compressive stress and bending stress, and also bears a certain tensile stress when demoulding. Since the die is in contact with the hot blank, it needs water cooling, so it bears thermal fatigue and thermal erosion caused by thermal stress , Under such harsh service conditions, the mold often has thermal fatigue cr...

AI Technical Summary

Problems solved by technology

[0003] The stress of the automobile semi-axis forging die: it bears both compressive stress and bending stress, and also bears a certain tensile stress when demoulding. Since the die is in contact with the hot blank, it needs water cooling, so it bears thermal fatigue and thermal erosion caused by thermal stress , under such harsh service conditions, the mold often has thermal fatigue cracks and is scrapped, and the service life is very low

[0004] Automobile semi-axis forging dies are usually produced by forging. The uniformity of the die structure is poor, the tensile properties and impact toughness are low, the die loss is large during the production process, the product yield is low, and the production efficiency is not high.