What's the Best Process for Machining a Precise Hole in Aluminum?
This small hole is actually large enough that any of three different processes might be used.
Question
How can I achieve 0.0025-mm tolerance on an internal diameter of 4.5 mm? The material is aluminum alloy. What machine or process should I use?
Response from John Bradford, micromachining R&D team leader for Makino
This feature and machining tolerance are achievable using one of several techniques. They are:
1. Precision boring -- using vertical or horizontal spindle, with a boring tool
2. Helical interpolation -- using an insert cutter, or coated carbide end mill. This is the preferred method for fastest machining speed. Repeatability of 0.001 mm is possible.
3. Wire EDM. This provides repeatability of size and straightness of 0.001 mm or less if required. This is a slower process, but machining variables are simple to control. (Of course, EDM assumes the hole passes completely through the part.)
Related Content
-
Buying a Lathe: The Basics
Lathes represent some of the oldest machining technology, but it’s still helpful to remember the basics when considering the purchase of a new turning machine.
-
Choosing a Five-Axis Machine Tool With Automation in Mind
While much focus is placed on the machinery that moves parts, the features most important for automating five-axis machining are arguably found in the machine tool itself.
-
Choosing Your Carbide Grade: A Guide
Without an international standard for designating carbide grades or application ranges, users must rely on relative judgments and background knowledge for success.