A Broaching Tool for Machining the Rifling of the Inner Hole of Small Caliber Cannon Barrel

Abstract

The invention relates to a broaching tool for machining small-caliber gun body tube inner hole rifling, and belongs to the technical field of machining. The broaching tool comprises a bracing wire tool rod, a bracing wire tool apron and a bracing wire tool bit. A tool clamp of the bracing wire tool apron is arranged in a tool clamp mounting hole of a tool apron body through a connecting shaft, the tool clamp is made to rotate around the tool clamp mounting hole of the tool apron body, and the bracing wire tool bit is fixed in a mounting groove in the upper surface of the tool clamp. A core rod is inserted into the tool apron body. The rear end of the tool apron body is in threaded connection with a tool rod body of the bracing wire tool rod, the rear end of the core rod is in threaded connection with a pull rod of the bracing wire tool rod, the tool rod body and the tool apron body are controlled through a pulling plate on a machine tool spindle box to move front and back relative to the pull rod and the core rod, and the core rod drives the front end of the tool clamp to vertically swing through two tapered columns. The bracing wire broaching tool is simple in structure and convenient to use, the tool is accurately stretched out and drawn back in the radial direction in the mechanical broaching process of the small-caliber gun body tube rifling, and therefore the broaching machining of the rifling is achieved.

Description

technical field [0001] The invention relates to a broaching tool for processing the rifling of the inner hole of a small-caliber artillery barrel, which belongs to the technical field of mechanical processing. Background technique [0002] Gun barrel rifling processing techniques generally include extrusion, broaching, electrolytic machining and other processes. Squeeze rifling is suitable for shallow rifling, and it is mostly used for rifling processing of gun barrels. At present, the barrel rifling of the domestic artillery industry mainly adopts mechanical broaching and electrolytic machining, and broaching is often used for medium and large caliber guns, while electrolytic machining is generally used for the rifling of small caliber artillery barrels. Since some factories have no electrolytic processing equipment and lack of processing experience, it is necessary to design a special tool system based on the existing equipment of the enterprise to realize the processing ...

AI Technical Summary

Problems solved by technology

[0003] Due to the large diameter of the inner hole of the medium and large caliber artillery barrel, the rifling can be realized by designing a relatively complicated tool device, but the small caliber artillery barrel with a small inner diameter (φ25mm, Φ30mm) and a large length-to-diameter ratio (85:1) Unable to use such complex tooling

Because some factories do not have electrolytic processing equipment and lack processing experience, the cost of investing in electrolytic processing equipment is too high. Therefore, it is necessary to design a set of special tooling devices on the basis of the existing equipment of the enterprise to realize the processing of small-caliber gun barrel rifling.

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