Vertical machine tool structure for machining blade by using two cutters

Abstract

The invention discloses a vertical machine tool structure for machining a blade by using two cutters. The structure comprises a base, a workpiece clamping mechanism and cutter movement mechanisms, wherein the workpiece clamping mechanism comprises a clamping platform, and a movable tail frame and a rotary workbench which are arranged at the upper end and the lower end of the clamping platform andare used for clamping the blade to be machined; a set of cutter movement mechanism is arranged on the two sides of the workpiece clamping mechanism respectively; the cutter movement mechanism comprises a spindle head and a driving mechanism for driving the spindle head to move in a space; the spindle head of one of the two sets of cutter movement mechanisms on the two sides of the workpiece clamping mechanism swings through a swing head; the two spindle heads at cutter ends in the two sets of cutter movement mechanisms are arranged on the two sides of the profile of the blade to be machined respectively; and a fixed angle beta is formed between the axes of the two spindle heads at the cutter ends. The maximum swing range of the spindle heads in a swing head structural form is + / -90 degrees, and when a machine tool special for machining the blade by using the two cutters is designed, a certain angle beta is formed between spindles on the two sides, so that the process range of the machine tool can be determined, and the advantage of machining the blade by using the two cutters is fully exerted.

Description

technical field [0001] The invention belongs to the technical field of machine tools, and relates to a machine tool structure, in particular to a vertical machine tool structure for machining blades with double knives for machining long blade profiles of steam turbines. Background technique [0002] The blade is one of the core components of the steam turbine, which plays a role in converting the kinetic energy of steam into mechanical energy. The efficiency of a steam turbine depends largely on the design and manufacturing level of the blade profile. The long blades of the steam turbine have a large aspect ratio and a complex cross-section, and their processing characteristics are similar to those of the slender shaft parts. Slender shaft parts (length-to-diameter ratio > 20) have poor strength and rigidity. They are affected by their own weight, cutting force and cutting heat during processing, and are prone to vibration and deformation. The processing quality is diffi...

AI Technical Summary

Problems solved by technology

[0006] Due to the complex profile of the long blades of steam turbines, if the double-knife blade machining machine still adopts the traditional 160° layout, it will not be able to meet the quality requirements of blade processing, and it will be difficult to give full play to the advantages of double-knife blade machining

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