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Shanghai XX Company

1.Industry introduction

The cylinder is the shell of the steam turbine. Its function is to separate the flow passage part of the steam turbine from the atmosphere and form a closed chamber, which ensures that the steam can complete the energy conversion process inside the steam turbine, inside the cylinder are parts such as nozzle chamber, Baffle, baffle sleeve, etc. . Outside the cylinder are connected with pipes such as steam inlet, exhaust, extraction, etc. 

2.Processing background

●There is a ring of countersunk hole 127 in the upper inlet end of the main cylinder of steam turbine, which needs to be processed. There are 28 holes in total, and the depth of each hole reaches 700mm

●Difficult points of workpiece processing

●Processing hole depth of more than 700, easy to produce vibration lines

●Higher machining efficiency is required

●Large Blank Allowance, poor rigidity

3.Cutting tool scheme

Non-standard damping boring cutter+Alloy rings+Knife block，design drawings are as follows:

Damping damping boring bar:DIN69871 50 VBR D80.614.VE-19110

Insert:TCMT 16T308-PM（10pcs）

4.Processing parameters

5.Test the effect

In the hole processing process can effectively solve tool vibration, enhance the blade and tool life, improve production efficiency, save customer costs and other issues, to the customer's benefit to promote power!

Same efficiency, same precision, same life, 40% difference! ! !

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