Device and method for machining metal beryllium single-blade outer chip removal deep hole

Abstract

The invention relates to a device and method for machining a metal beryllium single-blade outer chip removal deep hole. According to the device, a mounting plate used for clamping a workpiece, a tool bar guiding and supporting sleeve sued for supporting a tool and a connecting structure used for being connected with an oil pressure system and the tool are arranged on a common lathe, the tool is a hard alloy deep hole gun drill and is clamped on a three-jaw chuck of the lathe, the mounting plate is arranged on a middle supporting plate of the lathe, and the tool bar guiding and supporting sleeve is arranged between the three-jaw chuck and the mounting plate. Compared with the prior art, the method for machining the metal beryllium single-blade outer chip removal deep hole solves the problems of chip breakage, chip discharge, cooling, lubrication, guidance, drilling deviation and the like existing in the existing metal beryllium deep hole machining process, and therefore the machining finished product rate of beryllium is effectively improved, the deep hole with a draw ratio of 50-150 and an aperture phi smaller than or equal to 20mm of metal beryllium materials is machined successfully, hole machining precision can reach IT8, and surface smoothness can reach Ra0.8.

Description

[0001] Metal beryllium single-edged outer chip removal deep hole processing device and processing method Technical field [0002] The invention relates to the technical field of non-ferrous metal processing, in particular to a deep hole processing device and a processing method for single-edge external chip removal of beryllium. Background technique [0003] The machining performance of metal beryllium is mainly determined by the mechanical properties of metal beryllium, including hardness, elastic modulus, strength and plasticity, etc. All conventional machining methods can be used to process beryllium, such as turning, milling, grinding, planing, and metal beryllium. , Boring, drilling, reaming, sawing, tapping, etc. Other processing methods such as EDM, EDM drilling, mechanical grinding and polishing, electrochemical corrosion, etc. are also suitable for mechanical processing of beryllium. However, there are two difficult problems in the machining of beryllium: First, due to th...

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Problems solved by technology

However, there are two problems that are difficult to solve in the machining of beryllium: 1. Due to the brittleness of beryllium and the sensitivity to notches, when machining beryllium, when the tool leaves or enters the workpiece, edge slag will appear, and even lead to Beryllium workpieces are brittle under low stress; 2. Beryllium has severe tool wear and tear, and it is difficult to ensure machining accuracy. This is because beryllium machining is brittle, and high-hardness chips generate normal stress on the front of the tool and continuously impact the cutting edge. The tool is eroded, and the fine beryllium powder (including beryllium oxide) in the powder metallurgy beryllium also has a grinding effect on the tool, and the cutting edge wears quickly, which is more significant for high-speed steel tools

[0005] In the prior art, for deep hole machining with a ratio of hole depth to hole diameter ≥ 20, special deep hole drilling equipment needs to be used for deep hole machining. This technology mainly has the following problems: 1. Difficulty in chip breaking and chip removal

If the defect rate in the machining process is too high, the cost of the product will be even more astonishing

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