Jump to content

Jeff Amundson

Members
  • Content Count

    33
  • Joined

  • Last visited

  • Days Won

    3

Jeff Amundson last won the day on June 7

Jeff Amundson had the most liked content!

Community Reputation

46 Excellent

Profile Information

  • Gender
    Male
  • Location
    southern Wisconsin

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. The mystery wood looks like impreg to me. Impreg is an early version (mid 20th century) of stabilized wood, usually with a phenolic resin impregnating a laminate in a vacuum. A higher density version called compreg was produced under high pressure on the laminate. The smell was probably the phenolic.
  2. Thanks, Aiden. That means a lot. My second career was as manufacturing engineer in a bicycle factory. The president of our company once pulled me out of a design brainstorming session because any talk of manufacturing capabilities would 'stifle the designers' creativity'. I can't think of a design without thinking about its process, so form and function are a blur in my mind. Thanks for the compliment, Dick. I started grinding knives ala Bob Loveless in the early '80s. I took up blacksmithing about 2000. Many blacksmiths hate grinding, and many bladesmiths are not great blacksmiths
  3. Thanks guys. I was shocked when the internet failed me. I thought I was just looking in the wrong places, so I joined Instagram. There are a few people forging scissors occasionally, but they are often doing it as a sideshow. I'm 72. In my first career, I taught public school industrial arts for 10 years. I've been making stuff all my life. I have never before experienced the reaction I get when I tell people I make scissors. The predictable reaction is a jaw-drop along with a statement of disbelief. People just can't comprehend the idea of an actual person making a pair of scissor
  4. Here's my latest design using as-forged shanks and bows. The round cross-section is easy on the fingers. I shape the bows on a mandrel, so I can change the size and shape to fit. The long tail that forms the wrap is a little tedious to forge. Since it ends up under 1/8” diameter, it's like forging wire. As a dedicated hobbyist, I've lurked on this and other forums for years. I never felt qualified to comment on much of anything. When I started playing with scissors, I expected to find inspiration and ideas to steal online. I found next to nothing to
  5. My industrial experience was with epoxy-bonded aluminum bicycle frames. The prescribed bond prep was to blast with aluminum oxide grit followed by rinsing with isopropyl alcohol, no exceptions, no substitutes.
  6. Thanks Alan. I don't think Grace forges. As far as historical practice, I've seen scissors produced both ways. I learned the butt weld because my first scissors were little one-piece spring shears, and they are made that way. I bought one an Amazon and reverse engineered it. When I started to make pivoted scissors, I decided to see if I could scale up the technique. It seemed to work, and I've since seen some historical examples. I've seen videos of scissors produced with the flatwise laminate you described. I haven't been tempted to try it, because I don't know what I'd gain by it
  7. My method of making a scissors blade is to forge weld a tool steel cutting edge to a 1018 body. I've tried a few different tool steel alloys, but I'd like some expert opinions to help me optimize my choice. This photo shows how the tool steel sits on the 1018 for welding. The forged blade (that I pulled from my scrap pile) shows how the blade is drawn out. I forge to thickness, not length. The blade starts 5/16 thick, and I forge it to 5/32, which about doubles its length. I've used 01, 1084, and 5160. I have two main criteria I'm trying to consider in alloy selec
  8. There's no scarf in these pictures. I think you're looking at how the O1 broke. I scarf the butt end of the O1 where I have to blend it into the 1018, but that's not in these pictures.
  9. I think I know what's going on here, but I'd to hear other opinions. This scissors blade was an experiment to begin with. When I found some cracks, I decided to break it to see what was revealed. The first picture shows the tip end of the blade. It's a heat treated laminate of 1018 and O1. I used a little ferric chloride to clearly show the two alloys. I sawed and ground the 1018 to remove it from a short section. Then I clamped the exposed stub of O1 in a vise and tried to create a peel in the weld. The O1 eventually broke. I was happy how far the O1 bent before breaki
  10. Not at this stage. I forge them as flat as I can. Adjusting the blade overlap is one of the last steps. We follow each other on Instagram. She's been a great help.
  11. Today I tried drilling the pivot hole before doing any grinding. It's the first time I've done it this way. I need the pivot screw in place to finish the hot work, but I don't like cleaning the scale off multiple times. The forgings need to fit together as forged, but it will let me finish the hot work before touching the grinder. The white mark on the blade is where the tool steel cutting edge ends.
  12. I brought a laser into the smithy and noticed no time warp. It should help me create symmetry around a centerline and locate the pivot hole.
  13. Thanks for all your kind words. I was a knifemaker before I took up blacksmithing. I enjoyed blacksmithing more. Scissors gives me the best combination of both.
  14. I've tried a variety of pivots, both rivets and screws. My first pivoted scissors were bonsai-type, so I used a rivet. Typically these scissors have conical copper or brass washers on the rivet. I initially thought the cone shape was acting like a belleville washer to apply some spring force. What I now understand is that the cone simply lifts the head of the rivet off the scissors blade so peening the head doesn't expand the rivet in the hole in the blade. The rivet is also an axle, so it needs to fit nicely in its hole. Most scissors don't use any spring force to hold the blades together. Wh
×
×
  • Create New...