Special working technology method for inclined chamfer of square opening of transition section shell

Abstract

The invention discloses a special working technology method for an inclined chamfer of a square opening of a transition section shell. The following three measures are taken for guaranteeing the working technology size of the inclined chamfer of the square opening of a part according to a shape feature of the square opening of the transition section shell, a shape and a size of the inclined chamfer of the square opening of the part and processing characteristics of three-dimensional solid laser equipment: 1, downwards putting the square opening of the part of the transition section shell; 2, designing and manufacturing a simple auxiliary supporting clamp which is positioned through the end surface part of the square opening of the part, and enabling a part to be cut of the inclined chamfer of the square opening of the part to protrude out of a clamp base; 3, programming according to a contour size of the cut inclined chamfer of the square opening of the part, and cutting the part by adopting a high-energy laser beam. The special working technology method has the advantages that the shortcomings of low efficiency in the conventional four-coordinate milling processing, large cutting force and the like are overcome; high-speed cutting can be implemented; the deformation is small; the processing quality is high; the special working technology method can be also used for quick and high-efficiency processing of parts of other similar complicated shells, and great help is supplied to the improvement on the part processing efficiency and the processing quality.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a special processing method for obliquely chamfering the square mouth of a transition section shell. Background technique [0002] The oblique chamfering of the transition section of the combustion chamber of the heavy-duty gas turbine has been processed by four-coordinate equipment. This processing method requires the following three conditions to realize: First, design and manufacture a milling fixture suitable for four-coordinate For side processing, all the processing area can be reached; second, equipped with a 45° special chamfering cutter, which is used for milling and processing the chamfering of both sides of the square mouth of the part; third, use the rod milling cutter to process the chamfering depth of 5.0 ~ 5.5mm and steps Size 1.5 ~ 1.75mm. [0003] However, because the wall thickness of the shell parts in the transition section is only 3.18mm, when performing...

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Problems solved by technology

[0003] However, because the wall thickness of the shell parts in the transition section is only 3.18mm, when performing four-coordinate milling and chamfering, the square mouth of the part is often deformed due to the large cutting force, resulting in the out-of-tolerance contour size of the square mouth of the part, which cannot even be repaired. As a result, the parts are scrapped, which increases the manufacturing cost of the parts

Moreover, the bevel chamfering of parts by four-coordinate milling needs to be carried out in two steps, and the processing time for a single piece is as long as 3 hours, which takes a long time

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