Repairing method for Pda630 press gear

Abstract

The invention relates to a repairing method for a Pda630 press gear in the technical field of gear repairing. The repairing method comprises the following steps that S1, an old gear is subjected to structure surveying and mapping and material determination; S2, a damaged old shaft sleeve and a damaged old center plate are cut off, and an original gear ring is reserved; S3, the ellipse amount of the old gear is eliminated, and primary low-temperature tempering is conducted; S4, a new shaft sleeve, a new center plate and a new supporting cylinder are manufactured again, combined and connected in a spot welding mode; S5, a new gear subjected to spot welding is preheated, and after a to-be-welded part of the new gear is preheated to 130-170 DEG C, protective atmosphere welding is adopted; S6, the welded new gear is subjected to low-temperature tempering, the tempering temperature is 180+ / -5 DEG C, heat preservation is conducted for 6+ / -1 h after the temperature is reached, and then the new gear is subjected to air cooling to the room temperature; and S7, finish machining and key groove machining are conducted on the new shaft sleeve. According to the repairing method, the use performance of the repaired gear can be guaranteed, the repairing cost can be reduced, and the time for maintaining a press is saved.

Description

technical field [0001] The invention relates to the technical field of gear repair, in particular to a repair method for a Pda630 press gear. Background technique [0002] The Pda630 / 1.5 closed double-point mechanical press produced by Wagner, Germany is the forming host of the automatic forging line. The two shafts in the transmission system use transitional large herringbone gears, such as figure 1 As shown, the gear is welded and processed by a ring gear, a shaft sleeve, two web plates and multiple support cylinders. It is a kind of large gear structure; In the process, the web plate of the large herringbone gear is fatigued, cracked and damaged, the shaft sleeve is detached, and the transmission function is lost; [0003] Because foreign original gears are expensive and may not be produced for a long time, domestic gear manufacturers need to process the damaged large gear and the well-fitted small gear at the same time in order to ensure the original performance, which ...

AI Technical Summary

Problems solved by technology

[0002] The Pda630 / 1.5 closed double-point mechanical press produced by Wagner, Germany is the forming host of the automatic forging line. The two shafts in the transmission system use transitional large herringbone gears, such as figure 1 As shown, the gear is welded and processed by a ring gear, a shaft sleeve, two web plates and multiple support cylinders. It is a kind of large gear structure; In the process, the web plate of the large herringbone gear is fatigued, cracked and damaged, the shaft sleeve is detached, and the transmission function is lost;

[0003] Because foreign original gears are expensive and may not be produced for a long time, domestic gear manufacturers need to process the damaged large gear and the well-fitted small gear at the same time in order to ensure the original performance, which increases the cost. More importantly, , the quality of the original ring gear is intact, and the life of the domestic ring gear will be shortened if it is replaced; therefore, a repair method that can reduce the cost and maintain the performance of the gear is needed

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