The Machinist Makes The World
- June 2013
- Manual and CNC Machining
- At the Laney Community College Machine Shop
One day we decided that additional training was necessary for us to carry our dreams into reality. This sample of parts represents a vocational program in Machine Technologies and an understanding in the setup and operation of vertical milling machines, engine lathes, drill presses, surface grinders, and CNC machines.
Two perfect gage blocks. From rough square up to carbonizing, hardening and tempering, to surface ground perfection. These blocks are absolutely 62 Rockwell C twins.
Single Point Threading
3A and 3B Unified National Fine threads, 1½" in diameter. Single point cut using carbide.
316L Stainless Bushing
Over time, stainless steel in its various forms has proven to be the most fun to work with. It is, in fact, a beautiful material. With an austenitic structure, 316 stainless is non-magnetic. Though, through some processes the steel will work harden and shift into a martensitic structure, becoming magnetic. As it did in this case. View print.
ZeroSet Test Indicator Holder
This particular indicator holder is used to set a machine’s zero over cylindrical parts. The body was CNC machined out of aluminum, the knobs are 316L stainless, the guides are off the shelf ¼” drill rod. With a spring-loaded fine adjustment. At the time $200+ on Enco.
Formed in 1995 by the metalworking trade associations. The National Institute for Metalworking Skills (NIMS) sets skills standards for the industry, certifies individual skills against the standards and accredits training programs that meet NIMS quality requirements.
NIMS operates under rigorous and highly disciplined processes as the only developer of American National Standards for the nation’s metalworking industry accredited by the American National Standards Institute (ANSI).
This set of parts represents a continued interest in learning a trade through a recognized certification.
Turning: Chucking Operations
External and internal threading, thread relief, grooving, and turning using carbide. Maintain the concentricity of an internal bore to an external feature, and hold perpendicularity on facing and turning operations. View print.
Turning: Between Centers
Turning, UNF and UNC 2A threading, grooving, and knurling. Maintain a max of 0.001" total run-out. View print.
A grand combination of GD&T. Maximum material conditions and positional tolerances, overall perpendicularity and parallelism, center-line features, and hole perpendicularity and depth. View print.
CNC Turning, Longhand
Handwritten G-Code CNC program. Radius and angle control, taking tool radius into consideration. View print.