Two-wheel fillet rolling strengthening machine used for bolt rolling strengthening

Abstract

The invention discloses a two-wheel fillet rolling strengthening machine used for bolt rolling strengthening. The fillet rolling strengthening machine comprises a rack, and a feeding device, a rolling device, a rotary driving head device and a control system are arranged on the rack. The rolling device comprises two rolling wheels which are symmetrically arranged, and the distance of the two rolling wheels is adjustable. The feeding device further comprises a feeding positioning device, the feeding positioning device is used for positioning a bolt transferred by a feeding transferring device between the two rolling wheels, the rotary driving head device drives the positioned bolt to rotate, and the two rolling wheels carry out fillet rolling strengthening on the bolt along with the rotating bolt. According to the two-wheel fillet rolling strengthening machine, arc rolling strengthening of the bolt can be realized, precision consistency is good, the manufacturing cost is greatly reduced, a pin shaft and rolling wheel inner holes are not prone to being worn, and meanwhile the radial run-out and the end face run-out of the rolling wheels are reduced to 0.01 mm.

Description

technical field [0001] The invention relates to the technical field of strengthened rolling of aviation fasteners, in particular to a two-wheel fillet rolling strengthening machine used for strengthened rolling of bolts. Background technique [0002] It is applied to the high-strength fastener bolt head and rod transition part of the high-strength fasteners represented by aviation bolts. The fillet rolling strengthening process applies positive rolling pressure to the arc for enhanced rolling to generate compressive stress on the arc surface of the metal. , to improve the surface roughness of the arc, increase the density of the metal material at the arc joint, to prevent and avoid the occurrence of micro-cracks on the arc of the head-rod joint of the bolt under the condition of frequent tensile stress, and finally realize the use of aviation Flight safety of various aircraft and devices bolted together. [0003] In the processing of the traditional three-roller rolling hea...

AI Technical Summary

Problems solved by technology

[0003] In the processing of the traditional three-roller rolling head, in order to adapt to the geometric conditions of the three-roller rolling (the three-rollers do not interfere with each other), when rolling workpieces with a diameter of less than 8mm, the diameter of the three-rollers has to be made very large. Small, so the diameter of the rotating pin shaft on which the roller is installed is smaller, resulting in the pin shaft not being able to install the bearing

In the working state, it is always in a state of dry friction relative to the roller, the pin shaft is easy to wear, and the inner hole of the roller is also easy to wear

[0004] In addition, because the diameter and hole diameter of the three rollers are too small, it cannot be manufactured by the arc rolling strengthening process of the traditional mold manufacturing method after heat treatment.

[0005] In addition, the diameter of the three small rollers is too small and the thickness is too thin, so that when the rollers are under pressure, the compressive strength at the arc is low, the pins wear quickly, and the wear of the three pins is inconsistent. The gyrations of the three rollers are different, the force on the parts is uneven when the arc is rolled, and there are many shortcomings such as unstable size and shape after the arc rolling is strengthened.

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