Bulging die and method capable of retracting bulging petals at high temperature

Abstract

The invention provides a bulging die and method with retractable bulging petals at high temperature. The die comprises a lower die plate, an inner supporting ring and an outer supporting ring are connected with the lower die plate through bolts, and a wedge block is arranged between the inner supporting ring and the outer supporting ring; a plurality of circular through holes are formed in the lower die plate; the upper ends of the outer supporting ring and the inner supporting ring are connected with a slideway plate through bolts, a T-shaped groove is formed in the upper surface of the slideway plate, a guide plate connected with the bottom of the bulging petal is slidably connected with the T-shaped groove, and a V-shaped groove matched with the wedge block is formed in the bottom of the bulging petal; a fan-shaped hole is formed in the position, corresponding to the wedge block, of the slideway plate; and an outer limiting ring and an inner limiting ring are connected to the uppersurface of the slideway plate through bolts, and the upper surface of an bulging core is connected with the upper die plate through screws. According to the bulging die, an adapter plate and the wedgeblock fixed on the adapter plate are pushed by utilizing the ejection force of an ejector rod of hot forming equipment, and the bulging petals of the die are pushed to return under the action of thewedge block, so that the bulging petals of a bulging petal structure bulging die return at the high temperature of 600-900 DEG C, and the bulging die is suitable for engineering continuous production.

Description

technical field [0001] The invention belongs to the technical field of thermal bulging of ring parts, and in particular relates to a bulging die and method with retractable bulging petals under high temperature. Background technique [0002] The bulging of the ring can be carried out by flexible medium or rigid mold, and the most common rigid mold structure is the expansion mold, and in the hot state (600 ~ 900 degrees Celsius) bulging, the mold material must use anti- Heat-resistant steel with strong oxidation ability and certain thermal strength, all kinds of materials in the hot state do not have high hardness, and surface oxidation is inevitable, and good surface gloss cannot be formed to ensure good activity coordination between movable parts , In addition, various types of springs will fail at high temperatures and cannot be used normally; currently, the commonly used bulging molds for ring parts include the following types: figure 1 Shown is a bulging mold that utili...

AI Technical Summary

Problems solved by technology

[0002] The bulging of the ring can be carried out by flexible medium or rigid mold, and the most common rigid mold structure is the expansion mold, and in the hot state (600 ~ 900 degrees Celsius) bulging, the mold material must use anti- Heat-resistant steel with strong oxidation ability and certain thermal strength, all kinds of materials in the hot state do not have high hardness, and surface oxidation is inevitable, and good surface gloss cannot be formed to ensure good activity coordination between movable parts , In addition, various types of springs will fail at high temperatures and cannot be used normally; currently, the commonly used bulging molds for ring parts include the following types: figure 1 Shown is a bulging mold that utilizes springs to realize the retraction of the bulging flaps, such as figure 2 The mold shown uses the longitudinal slideway on the conical surface and the ejection force of the ejector pin to realize the retraction of the expansion flap, as shown in image 3 The above-mentioned three kinds of molds are all bulging molds for ring parts, but they all have some defects: the spring in the bulging mold that uses springs to realize the retraction of the bulging flaps is under high temperature. It will be annealed and fail to work normally, and cannot be used in a hot state; the mold that uses the longitudinal slideway on the cone surface and the ejector force of the equipment to realize the retraction of the expansion valve, because there are three sliding fits during the forming and pressing process Surface, the sliding mating surface cannot meet the required hardness and surface roughness under high temperature of the mold, the friction force is very large, and the expansion action of the expansion valve cannot be realized according to the design intention, and the phenomenon of "mold grinding" is serious, and may even reach the surface close to welding. Due to the closed state, it cannot work normally at high temperature; the manual operation is used to retract the expansion flap, because there is no mold mechanical retraction mechanism, it is necessary to cool the mold and parts to room temperature after the product completes the hot state bulging. Not suitable for the engineering needs of mass continuous production

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