Tool and method for processing half-speed machine crankshaft

Abstract

The invention relates to a tool and a method for machining a crankshaft of a medium speed machine. The machining tool is provided with a cutter for machining a load release groove, a R40 special molding cutter for machining the surface of a balance block and a plug of a crossed hole of a drill gun. The machining method comprises: firstly, according to the prior method, a crankshaft billet of the medium speed machine is subjected to primary TR forging and molding; a main journal, a turning journal, the load release groove, the output end of the load release groove and a free end flange are subjected to machining; the milling balance block ,the shape of a turning arm, and end flange drilling are evenly distributed with holes and screw holes are subjected to machining; the main journal and the turning journal are ground and are subjected to final finishing; subsequently, the load release groove is processed through the cutter for machining the load release groove from outside to inside for a few times by delamination. The R40 special molding cutter is used to machine the surface of the balance block in a vertical cutting mode. The gun drill drills and cuts a guide hole and an oil hole to a crossed hole, and a plug is adopted in the crossed hole. A phi 700 flange hole is drilled through an aiguille and is machined through a Mohs lengthening drill bush. The tool and the method for machining can ensure the quality of a product and greatly improve production efficiency.

Description

technical field [0001] The invention relates to a tool for machining a crankshaft of a medium-speed machine and a machining method. Background technique [0002] The main component of the ship is the diesel engine, and the core component of the diesel engine is the crankshaft. However, the processing of the crankshaft has many processes and the long route has become the bottleneck of the shipbuilding industry. The crankshaft processing progress and quality directly affect the delivery of new ships. For example, the 6PC2-6 crankshaft used to be imported from abroad, and the processing equipment used was a turning-milling compound machining center. However, our company's ordinary CNC machine tools have no processing schemes that can be used for reference. The 6PC2-6 crankshaft is the largest crankshaft among medium-speed diesel engine crankshafts. The crankshaft has the characteristics of high machining accuracy, large metal removal rate, large number of holes, small and deep...

AI Technical Summary

Problems solved by technology

During processing, it is necessary to feed from the outside of the first flange to process the hole 19 of φ21. The length from the outside of the first flange to the inner end of the second flange is 505mm, and it must be processed with a φ20.8×505 extended drill bit. The overhang is long and the rigidity is poor, and it is easy to drill off and cause the position to be out of tolerance

[0012] Therefore, the production efficiency of the original traditional processing tools is low, and the quality is difficult to guarantee. It can no longer meet the requirements of mass production. New processing tools and processing methods need to be proposed.

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