Rear axle regulating nut punching die and punching process

Abstract

The invention discloses a rear axle regulating nut punching die and a punching process. The die is divided into both upper and lower parts; the top half part of the die comprises an upper die plate (2), a male die fixing plate (4), a guide pillar (5) and a punching male die (6); and the bottom half part of the die comprises a guide sleeve (9), a female die fixing plate (10), a punching female die (11) and a lower die plate (15). The rear axle regulating nut punching die is characterized in that a guide plate (8) is arranged between the male die fixing plate (4) and the female die fixing plate (10); the guide plate (8) is provided with an upper die guide hole in sliding connection with the guide pillar (5); the guide plate (8) is provided with a male die guide hole in sliding connection with the punching male die (6); the upper part of the guide plate (8) is connected with the male die fixing plate (4) by a discharging eraser (7); and a regulating nut positioning end face is arranged below the guide plate (8). According to the invention, the guide plate structure is adopted; the same punching die can be used for punching 16 holes on a regulating nut in two steps; a gap between the punching male die (6) and the punching female die (11) is ensured to be uniform; product quality and service life of the die are improved and prolonged; and the rear axle regulating nut punching die has high production efficiency and low production cost.

Description

technical field [0001] The invention belongs to the field of mechanical processing equipment, and relates to a punching die for a rear axle adjustment nut and a punching process. Background technique [0002] The rear axle assembly is connected to the transmission shaft through the main reduction assembly, and the adjustment nut plays the role of adjusting the bearing clearance, which directly affects the size of the meshing surface between the transmission gear and the driven gear, thereby affecting the service life of the gear and the abnormal noise of the gear, etc. . According to the current traditional punching die structure, the guide pillars and guide sleeves directly guide the upper and lower templates, which are greatly affected by the precision of the machine tool and the machining precision of the mold. Because the material of this workpiece is thicker, up to 5mm, and 8 Φ8 holes need to be punched at the same time, each punching punch is easy to move during the p...

AI Technical Summary

Problems solved by technology

According to the current traditional punching die structure, the guide pillars and guide sleeves directly guide the upper and lower templates, which are greatly affected by the accuracy of machine tools and mold processing accuracy.

Because the material of this workpiece is thicker, up to 5mm, and 8 Φ8 holes need to be punched at the same time, each punching punch is easy to move during the production process, so that the punching convex and concave gaps are uneven, and sometimes the punching hole The cutting edge of the convex and concave dies is missing, so that the burr height of each hole is often out of tolerance when punching (the workpiece punching burr out of tolerance will also directly affect the assembly function), which will cause the product to stick to the mold. Generally, 800-1000 products are produced every time. It is necessary to remove the mold and sharpen the punching convex and concave die edges

In addition, the workpiece plate is thick, and holes are punched at the same time at one time, and the diameters of each hole are small (for example, the thickness of the workpiece is 5mm, and 8 Φ8 holes are punched at the same time at one time). Generally, the punching punch will break every time 3000 products are produced, so it is necessary to frequently Replacing the punching punch will cause the precision of the mold to drop, thus affecting the service life of the mold

Therefore, the quality of the product has always been at risk, and the production efficiency is low, the service life of the mold is short, and the production cost is high.

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