Self-locking nut machining method and self-locking nut

Abstract

The invention discloses a self-locking nut machining method and a self-locking nut. The method comprises the steps that blanking is conducted, specifically, the periphery of a bar is cut by a preset thickness to reduce the outer diameter of the bar, and then the bar is cut into multiple sections of small bars; hot-press forming is conducted, specifically, the small bars are heated and softened, and then the small bars are put into a hot-pressing die to be stamped into cylinder structures with outer splines on the peripheries; solid solution and aging treatment is conducted, specifically, the cylinder structures are subjected to solid solution and aging treatment, so that the mechanical comprehensive performance requirements for parts are met, and the hardness HRC after solid solution and aging is 42-47; appearance and thread turning are conducted, specifically,the appearance is turned at first, and then threads are turned, or the threads are turned firstly, and then the appearance is turned; groove milling is conducted, specifically, a notch groove in one side of a workpiece is milled at first, and then a notch groove in the other side of the workpiece is milled; and end face grinding is conducted, specifically, the workpiece and a thread taper mandrel rod in close fit and threaded connection with the workpiece are fixed on a cylindrical grinding machine, and the two end faces of the workpiece are ground to be flat through a grinding wheel of the cylindrical grinding machine. By means of the method, the part machining cost is reduced, the qualification rate is increased, and the machining period is shortened.

Description

technical field [0001] The invention relates to the technical field of nut processing, in particular to a method for processing a self-locking nut and a self-locking nut manufactured by the method. Background technique [0002] The utility model patent with the patent number ZL201620026242.2 discloses a self-locking nut. The present invention is to develop a processing method for the self-locking nut. The process flow adopted by the existing self-locking nut processing method is: collar bar material→ultrasonic testing→solution aging (to meet the comprehensive performance requirements)→rough turning (removal of margin)→semi-finishing (processing shape and light hole)→ Grinding end face→tapping thread→hobbing→groove milling→closing and pressing→fluorescence detection→torque test→inspection and storage. The existing self-locking nut processing method has the following technical problems: [0003] 1. The cost of parts processing is high [0004] Processing external splines re...

AI Technical Summary

Problems solved by technology

[0006] The taps used for tapping threads are also hard alloy tools, which are not easy to grind and expensive to use

[0007] 2. The qualified rate of parts processing is not high

[0008] It is not easy to ensure the verticality of the end face to the thread. When tapping the thread, it is necessary to ensure that the supporting surface of the fixture is flat. However, in the actual processing process, the iron filings fall off and easily stick to the supporting surface or scratch the supporting surface, resulting in out-of-tolerance verticality. ;

[0009] Ordinary drilling machine is used for tapping thread, and its spindle beating and end surface movement are difficult to guarantee the verticality requirements; while using CNC machining center, due to the hardness and sticking characteristics of superalloy materials, the tap is very easy to break in the workpiece

[0010] 3. Long processing cycle

[0011] The main reason is that the gear hobbing process takes a long time, including rough cutting, semi-finishing and skin finishing. It takes three cuts, and the whole process takes about 25 minutes. In addition, because the overall processing quality of the workpiece is not high, fitters are often required to repair parts

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