Slotted lining preparation device and method

Abstract

The invention discloses a slotted lining preparation device which comprises a vertically-arranged working face, a feeding rod is arranged on the working face and is perpendicular to the working face, the head of the feeding rod extends out of the working face, the tail of the feeding rod is connected with a strip conveying mechanism, a strip-shaped hole for conveying strips is formed in the feeding rod, and the strip-shaped hole penetrates through the two ends of the feeding rod. A rigid core rod, a lower cutter, a forming pressing block and an upper cutter are arranged on the periphery of the feeding rod. The method for preparing the slotted bushing by using the preparation device comprises the steps S1-S11. The process and the forming size of the slotted bushing are controllable and stable aiming at strip rolling and rolling forming, so that the internal organization structure and the stress state of the slotted bushing are uniform, the width precision of a slot in the slotted bushing is high, the end face of the slotted bushing is free of fluctuation, and the two ends of the slot are free of straight edges; the device can be used for preparing small-specification-diameter slotted bushings, has high-efficiency and high-quality preparation capacity, and expands the application of cold extrusion strengthening of the slotted bushings.

Description

technical field [0001] The invention relates to the technical field of slit bushing production, in particular to a slit bushing preparation device and method. Background technique [0002] The slotted bushing cold extrusion strengthening technology has the characteristics of large interference, strong operability and high extrusion quality, which can significantly improve the fatigue life of the fastening holes of the structural parts, and also effectively improve its resistance to stress corrosion and corrosion fatigue. It has been widely used in the reinforcement of aircraft fastening holes and achieved good results. The slotted bushing is an important part in the cold extrusion strengthening technology of the slotted bushing. In the process of cold extrusion strengthening of the slotted bushing, due to the use of the slotted bushing, the damage of the hole and the accumulation of the extrusion port material during the extrusion process are avoided, the pulling force of t...

AI Technical Summary

Problems solved by technology

At present, the slotted bushes that can be manufactured in China have large diameter specifications, unstable dimensions, uneven internal structure and stress state, low slot width accuracy, large fluctuations in end faces, and certain straight edges at both ends of the slot.

Seriously affected the cold extrusion strengthening effect and quality of the slotted bush, and also greatly hindered the application and promotion of this strengthening technology

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