Could this april fools electric hammer be possible to make? - Page 1
Forum section: electronics / projects

author: Freesurfer
author_rank: Regular Contributor
timestamp: December 09, 2020, 09:19:48 pm
content: Watch this video of a guy that fakes a review about an electric hammer that swings itself.It is obviously fake, and even if it wasn't, it's not really a feasible product. But I laughed my ass off about it and it made me think about the engineering that would have gone into it if it was actually possible to make.By having some kind of piston or actuator inside that oscillates to make it swing, and perhaps by using a gyroscope that spins insanely fast to give it something to leverage the strikes fromI think it could be done if the swings were smaller and faster (It would just be a like an impact drill with a flat hammer bit instead of a drill bit), but the idea is to have one that that swings about at the same rate and distance per swing as in the video.I mean, it is not going to have any practical purpose. But if some tech company really needed to make something like it and had all the time and money in the world to put into the development of such a hammer, could it, in theory, be done?Edit: Typo

author: Gyro
author_rank: Super Contributor
timestamp: December 09, 2020, 09:36:34 pm
content: The problem is that a hammer is pretty difficult to aim. I think that even if possible, it wouldn't have any market compared to existing nailers, SDS on rotary lock etc. A device that swings in an arc, with your hand as the fulcrum would be pretty difficult.The only powered, long stroke hammer I can think of is a pile driver. Again, it has guided aim and linear motion.

author: Freesurfer
author_rank: Regular Contributor
timestamp: December 09, 2020, 09:40:45 pm
content: Yes the idea isn't to make it a feasible product. There are 1000 other ways that would be way better for putting a nail in, like an ordinary nail gun.It would just be funny to show someone the prank, then pull up a hammer like it and show someone that such a thing can actually exist

author: Nominal Animal
author_rank: Super Contributor
timestamp: December 09, 2020, 09:56:48 pm
content: A moving weight in the head wouldn't really work, because it'd just jerk the head. (I mean, put a marble inside a larger ball, then rattle it around; that's what it'd feel in your hand. No swing, just short jerks.)You might get something out of a mallet with a gyroscope, though. The gyroscope axis must be perpendicular to the hammer swing plane, or it literally makes the mallet un-swingable. Which in itself could be a funny gag; although the suitcase version is well known:The trick with the flywheel gyroscope in a mallet is that it'd need huge acceleration and deceleration. The change in the angular momentum means the mallet would feel like it was trying to swing.Of course, it would be doubly hard to aim, because changing the swinging plane introduces precession (which causes the swinging/rotating tendency in the suitcase gyroscope). You'd have to have a really strong motor, trying to accelerate then decelerate (powered deceleration, not just shorting out the magnetic field) in a rather rapid sequence, say half a second heavy acceleration, then half a second heavy deceleration, and so on.It would not help with hammering action, it would help with the angular momentum involved in the swing.You'd probably want to use a BLDC motor for this. I don't know if there are bearings that could take the hammering action (the rotation axis is planar to the surface being hit, though).But yeah, you can make a larger mallet that wants to swing. Hammer, no, because there is not enough room in it for a flywheel and a motor. Linear element would not induce any swing, just small jerks.

author: Mechatrommer
author_rank: Super Contributor
timestamp: December 10, 2020, 04:37:54 am
content: Quote from: Freesurfer on December 09, 2020, 09:19:48 pmyou use a switch to control your fatigue hammer you moron! why youtube filled with idiocracy? he should go to jail doing social work.