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We shot a brief video this morning, showing the punches in action. Here are some supplies and tools we find essential in our everyday work around the shop. We may receive a commission from sales referred by our links; however, we have carefully selected these products for their usefulness and quality.
None of them function. What do you need to do to see them? If you were making a lot of these Woodworking Square Hole Machine Process holes, this looks like a place to have two of them so you do not have to keep taking it apart to drill.
The few seconds to take it apart would add up over a large project. By Robert W. Product Recommendations. Tool Review. Robert W. Lang is a former executive editor of Popular Woodworking Magazine. Drew April 21, Ron April 21, Bob Lang April 20, Dan Donaldson April 20, You can drill a hole in a plate, insert the broach, then use a machine like an arbor press, hydraulic press or a broaching machine to push the broach into the workpiece, with each tooth removing a small amount of material until the final geometry is reached.
You may want to mute your speakers. There are different styles of linear broaches, too. Some attachments can be added to machines like a CNC lathe to cut internal keyways and other geometry. It can also be done for making external geometry, such as splines and hexes.
Even for linear broaching, any tool that needs to be custom-made can easily cost tens of thousands of dollars. Some shops will stock common sizes for regular work, such as keyway broaches.
Some guys have old die filing machines, which speeds up the filing process, and makes it slightly more accurate. Alternatively, you could use a pneumatic Dynafile to get it close-ish if the hole is large enough.
A Shaper is a machine that uses a single-point cutting tool in a linear motion no rotating to slowly cut away material. Otherwise, the chips will have nowhere to go and things will break.
Not a lot of machinists have worked on them. Typically this will be in the neighborhood of 0. Wire EDMs do have their downsides, though. The cut needs to go straight through the part so that the wire can be held taut and cycle through the workpiece. A cool thing about wires, though, is that they can tilt — you can cut tapers and other interesting geometries with these machines.
Another con to this route is that these machines are very slow, especially when compared to CNC cutting tools. This means that wire EDM jobs have the potential of being pretty expensive. A huge advantage, though, is that these machines are insanely precise, and can give a great surface finish.
Instead of using a wire as the electrode, a ram EDM uses a block of material like graphite, copper, etc to erode the material. The cool thing with this is that you end up with the negative imprint of the electrode that you made.
The down side to this process is that you need to make an electrode, which will wear out quickly and need to be replaced. If you need something very precise, you may need to make a roughing and a finishing electrode.
Or maybe it could be made using a few different processes. The main disadvantage to laser cutting is the surface finish and accuracy. Casting metal can be a great way of getting wonky shapes, but this can be quite the art to learn. Lots of guys can rig up a setup to cast metal in their back yard, but the results can be pretty wildly variable.
If you need something precision and you have a high volume of parts, die casting can be a really interesting solution. Different casting methods have different design constraints. For example, for casting processes that use hard moulds, draft angles need to be added in order for the parts to not shrink and become stuck in the molds.
For lower a lower cost method, sand casting might be practical. The main challenges with this method are getting a good surface finish and dimensional stability, since metal shrinks when it cools.
This is a rapidly growing technology, but the basic idea is to take the opposite approach to most traditional manufacturing methods. Instead of taking a block of metal and whittling it away into a finished product, metal AM additive manufacturing takes raw metal often in powder form and fuses it together, like with a laser or electron beam.
For example, the surface finish out of the machine is generally pretty rough. Anything that needs to be highly precise or smooth will need to either be machined or postprocessed some other way.
Ultimately, square corners are a great thing to avoid whenever possible! All of these processes have pros and cons — until we reverse engineer the Star Trek Replicator, that is. Do you have any questions? Or do you have a few tricks up your own sleeve on making square corners?
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