Machining method for conical inclined crown of blade

Abstract

The invention discloses a machining method for a conical inclined crown of a blade and belongs to the technical field of blade machining. According to the invention, the machining method for the conical inclined crown of the blade comprises the following steps: firstly, mounting the blade on a machine tool; machining a blade crown opening surface of the blade by using a milling cutter with octagonal blades, wherein the milling cutter comprises a rod-shaped handle and a cone frustum-shaped bit, and the handle is connected with the small end of the cone frustum-shaped bit; and a plurality of octagonal blades are uniformly distributed at the edge part of a big end of the cone frustum-shaped bit, so that the milling cutter machines the blade crown opening surface for two times by using a spiral feeding method. The machining method for the conical inclined crown of the blade, disclosed by the invention, has the advantages as follows: the machining efficiency is increased; the conical inclined crown of the blade can be cut in place at one time; both the opening part and the root part R can be sufficiently machined into place; due to spiral feeding, peaks and valleys are comparatively uniform and stable; the service life of the cutter is longer under the effect of a constant force; the load of a machine tool spindle is stable and the loss of the machine tool is small; the attention is unnecessarily paid to the machining state in machining at any time; and the probability of generating fatigues is low.

Description

technical field [0001] The invention relates to a method for processing blades, in particular to a method for processing blades of medium-voltage nuclear power engines. Background technique [0002] At present, the blade crowns of some blades are basically arc inclined crowns, and the requirement for uniform rough machining allowance is also gradually increased, especially when processing medium-pressure nuclear power blades, due to the blade crown inclination Large, deep and with a circular arc crown, it is very difficult or even impossible to process with general machine tools or processing techniques, so special machine tools and processing techniques are required to process them effectively, but special machine tools and techniques are used to process them. The process is complicated, the cost is high, and it is not conducive to popularization. At present, most manufacturers basically use the three-axis layered method for processing, but the biggest disadvantage of this...

AI Technical Summary

Problems solved by technology

[0002] At present, the blade crowns of some blades are basically arc inclined crowns, and the requirements for uniform rough machining allowances are gradually increasing, especially when processing medium-voltage nuclear power blades, due to the blade crown slope Large, deep, and with arc crowns, it is very difficult or even impossible to process with general machine tools or processing technology, so special machine tools and processing technologies are required to effectively process them, but special machine tools and technologies are used for processing. Its process is complex and expensive, which is not conducive to popularization

At present, most manufacturers basically use the three-axis layering method for processing, but the biggest disadvantage of this method is that the margin is not uniform, and there are still residual parts locally, that is, if figure 1 The blind cutting area mentioned above makes the appearance quality not very good, and the blade detection is not up to standard, and its main disadvantages are: 1. It needs multiple processes to complete the processing, and the processing time is long; 2. The part of the workpiece cannot be fully processed in place, The margin is not uniform; 3. The surface of the processed part has obvious layered step surface, and the appearance quality is not high; 4. Due to the uneven margin of the forging blank, the force on the tool is unstable and the tool wear is accelerated; 5. Due to the processing Uneven force in the process will cause unstable load on the spindle of the machine tool; 6. During the operation, you must always pay attention to the cutting state of the machine tool, which is prone to fatigue

Images