Machining method for tube expansion hole of diesel engine rack

Abstract

The invention relates to a machining method for a tube expansion hole of a diesel engine rack, wherein the rack comprises N coaxial tube expansion holes. The machining method is characterized in that through adopting a compound tool formed by combining at least two hole machining tools and being in combination with the supporting effect of a guide sleeve mounted in machined tube expansion holes on a tool bar, the machining of the tube expansion holes in different working procedures can be completed at the same working station; the machining method comprises the following specific steps: 1) mounting the rack and correcting the position; 2) preparing before machine; 3) using the compound tool to machine first tube expansion holes according to the sequence of rough boring, semi-rough boring, semi-fine boring, forward scraping, reversed scraping and reaming to meet the requirements; 4) using the compound tool, an extension rod and the guide sleeve to machine tube expansion holes to be machined one by one according to the sequence of rough boring, semi-rough boring, semi-fine boring, forward scraping, reversed scraping and reaming to meet the requirements till the machining of all tube expansion holes of the rack is completed. The machining method for the tube expansion hole of the diesel engine rack improves the machining efficiency, enhances the rigidity of the tool system, ensures the machining accuracy, and is suitable for machining of high precision deep holes like the tube expansion holes of the diesel engine rack.

Description

technical field [0001] The invention relates to a deep hole processing technology, in particular to a processing method for a diesel engine frame expansion tube hole, which belongs to the technical field of diesel engine manufacturing. Background technique [0002] Type 956 diesel engine is a high-speed diesel engine with four-stroke, V-arrangement, direct injection, exhaust gas turbocharging and intermediate air cooling. It has the characteristics of wide application, durability and reliability, convenient operation, small size and high power. Economical and reliable operation, it has always been in the leading position among the high-speed diesel engines in the world. The frame of the 956 diesel engine is nearly twice the size of the frame of the medium-speed diesel engine, and its processing difficulty is also higher than that of the frame of the medium-speed engine, especially in the expansion tube part of the frame. The expansion hole is one of the important processing...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a processing method for the expansion tube hole of the diesel engine frame, which can make the workpiece to be bored, scraped and reamed at the same clamping position, ensuring that the processing The dimensions and shape and position tolerances of the expansion tube holes of the final frame meet the requirements, so as to avoid the occurrence of quality accidents due to the low machining accuracy of the expansion tube holes of the frame

Images