Rough and fine boring device for processing cutter bar with step holes at two ends

Abstract

The invention discloses a rough and fine boring device for processing a cutter bar with step holes at two ends, which comprises a rotating main shaft, a balancing cutter bar, an adjustable rough boring holder, a rough boring cutter body, a rough boring cutter blade, an adjustable fine boring holder, a fine boring cutter body and a fine boring cutter blade, wherein the rough boring cutter body and the fine boring cutter body are respectively arranged on the adjustable rough boring holder and the adjustable fine boring holder; the adjustable rough boring holder and the adjustable fine boring holder are arranged on the balancing cutter bar, the machining allowance between a rough boring piece and a fine boring piece is 0.1-0.5 millimeter, and the whole rough and fine boring device meets dynamic balance requirements. The rough and fine boring device can be used for boring and machining a big hole while synchronously roughly boring and fine boring, and has a simple structure and low cost which is 30-40 percent of that of a standard composite tool and is only 1 / 3-1 / 2 of that of the common boring machining during machining, high machining precision up to IT4, roughness being Ra 0.2, low machining cost and remarkable labor-saving and energy-saving effects.

Description

Technical field: [0001] The invention relates to a boring tool for precision boring and large hole machining of motor housings for high-speed rail trains, in particular to a composite boring tool for finely boring large holes in motor housings for rail trains. Background technique: [0002] The structure of the motor casing for high-speed rail trains is as follows: figure 1 As shown, there is a hole for installing the stator on it. Both ends of the hole have steps, and it is difficult to perform high-precision machining with a conventional boring tool. In the machining industry, for large-diameter through-holes or large-diameter through-holes with a step at one end, although traditional boring tools can meet the machining accuracy requirements, they must be processed through rough boring, semi-fine boring and fine boring. The time required for processing is longer and the machining cost is high. Invention content: [0003] The object of the present invention is to provid...

AI Technical Summary

Problems solved by technology

[0002] The structure of the motor casing for high-speed rail trains is as follows: figure 1 As shown, there is a hole for installing the stator on it. There are steps at both ends of the hole, and it is difficult to perform high-precision machining with a conventional boring tool.

In the machining industry, for large-diameter through-holes or large-diameter through-holes with a step at one end, although traditional boring tools can meet the machining accuracy requirements, they must be processed through rough boring, semi-fine boring and fine boring. The time required for processing is longer and the machining cost is high

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