This blog is intended for UWM students enrolled in Assistant Professor Frankie Flood Advanced Jewelry & Metalsmithing courses in the Jewelry & Metalsmithing area. In this course students will investigate the role of the one of kind object in a society dominated by mass produced objects and the signi´Čücance of being a maker in contemporary society who works within the craft medium of metal.

Monday, September 14, 2009

machining on the lathe

Make sure to bring safety glasses and wear your closed toe shoes for today's class. You will also want to print out the following handouts. I would like for you to read through these. Some of the information will seem foreign to you, but reading through this will help make the demo's easier to digest. In addition to the handouts, please print out the diagram from above (this will serve as a good example of what profiles the different shaped lathe tool bits can cut).
1. Lathe Safety
2. Lathe
3. Getting Started
4. Facing Operations
5. Drilling Operations
6. Turning Operations
7. Parting Operations
8. Threading

There are some great videos on MIT's website that discusses shop safety and techniques. I have listed the links below along with their contents. You will be most interested in the lathe videos for our current use, but the other videos are very informative.

Machine Shop 1 – Machining Skills for Prototype Development (Length: 40:32)

  • Basic tour of the machine shop
  • Layout techniques (including transferring hole locations)
  • Basic tools: drill press, band saw, belt sander and grinder
  • Locating and drilling holes (includes using a center finder and deburring)
  • Tapping holes (including using a tap guide)
  • Drilling holes
  • Special drills for plastics and hard or abrasive materials
  • Drill press limitations
  • Bandsaw
  • Suitable speeds, feeds and materials
  • Bandsaw setup
  • Using the drill press vise
  • Good practice – clean up
  • Small belt sander configurations
  • Grinder operations and materials
  • Deburring and buffing
  • Finishing techniques
  • Parts and controls of a Bridgeport Mill
  • Quill feed
  • Axis handfeeds (11:20) backlash explanation (12:15)
  • Gib locks (14:40)
  • Power feed (18:33)
  • Digital readouts (21:07)
  • Milling machine set-up – squaring/tramming  the head square (22:37)
  • Squaring the vise – adjusting the vise so the stationary jaw is parallel to the bed (32:33)
  • Milling machine accessories and workholding techniques  (41:15)
  • Square and hex collet blocks – used to hold/clamp parts to machine features on 4 and 6 sides of a part respectively (1:02)
  • V-blocks  (2:10)
  • Hold-down clamps – used to hold large or irregularly shaped parts (3:40)
  • Using angle blocks – used to hold materials to machine features not perpendicular on a part (6:15)
  • Drill press vise – using a vise within a vise (8:29)
  • Lathe chuck with vise  – can be used to hold parts in the milling machine (11:11)
  • Double sided tape – can be used to securely hold a part without distortion (12:00)
  • Squaring high aspect ratio parts  (16:02)
  • Right angle attachment (23:04)
  • Slitting saws – used to cut slots/slits/features in a part (33:21)
  • Rotary table – used to machine circular parts, grooves, circles, and segments (41:16).  A dial indicator (43:20) or Coaxial indicator (47:25) can be used to square/center the table to the X & Y axes
  • 5C collet indexer – used to hold collets and to position parts in up to 24 positions  (52:42)
  • Squaring a part  – machining a piece of metal so all of the surfaces are flat, perpendicular and milled to the nominal size(1:00). Also covers using a fly-cutter (4:50) and deburring (8:40)
  • Squaring a plate (17:52)
  • Using the edgefinder (32:00)
  • Drilling holes with a mill (35:32)
  • Reaming holes  (1:00)
  • Boring holes with a boring Head (3:04) - also covers using Plug Gages to measure hole sizes (8:54)
  • Milling a slot (10:45)
  • Milling a shoulder, conventional and climb milling (17:11)
  • Cleaning the machine (21:05)
  • The Lathe components
  • Turning tools  (6:40)
  • Turning and facing (11:04)
  • Cutting off a part (22:45)
  • Drilling (32:20)
  • Tapping
  • Boring (7:31)
  • Knurling with a bump knurler (15:30)
  • Cutting tapers with the compound (22:21)
  • Turning shafts – using a live center (26:18)
  • Single point thread turning (31:03)
  • Lathe chuck
  • Lathe arbors (6:42)
  • Turning between centers (15:40)
  • Face plate irregular shapes (19:00)
  • Face plate thin materials (21:13)

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