Methods Of Manufacturing: Joining And Assembly in

Published Feb 11, 21
4 min read

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Our team is really much a threaded fasteners group, though we have actually occasionally used rivets in a couple of spots. Our robot has many tapped holes and countersunk screws utilized in applications where rivets could not actually be utilized. We frequently find ourselves eliminating, replacing, or repairing parts of our robot. It holds true that we could drill out a rivet and change it, but it's often rather challenging to fit a cordless drill and a riveter in a very difficult situation.

We have ball end allen secrets, t handle, and a set of allen keys for 3/8" socket wrenches. If you have a universal joint for the socket wrench, you can truly fit the allen wrench into tight areas. The second drawback of rivets is that they will just get one wall of package tubing.

If you weld a couple of threaded inserts into your box tubing, and utilize a couple of 1/4-20's, you really cut down your assembly/disassembly time. Our elevator assembly this year is an ideal example of quick assembly. To dismantle it, you should remove 7 threaded fasteners. You remove one 10-32 to release the chain and 6 1/4 -20's to get rid of the 75" high 1" x 2" uprights.

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Out team began using threaded rivets this year. Drill the hole (or use the existing hole), place the threaded rivet, and the part can be quickly screwed on and off. Micro Fasteners. Rivets are lighter and minimize slop in the structural system by filling the hole. Rivets are not quickly gotten rid of. Riveting more than 4 pieces of material together with blind pop rivets is not advised.

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Rivets will crush product throughout their setup, products that can not be crushed or that could be delaminated with a peak compression packing need to not be riveted with conventional rivets. Bolts are heavier and require a clearance hole to be drilled. Bolts will not decrease slop. Bolts are easily eliminated.

Both bolts and rivets can stand up to high tensions, compression and large loads if both material and size belong to the joint analysis. Since our robotic this year is half made of wood, we didn't utilize a great deal of rivets. We utilize a couple of wood screws to hold aluminum parts to wood, and some maker screws and nuts to hold other aluminum parts to wood.

We generally don't utilize locknuts on anything that may need to be disassembled for repair work or upkeep, since it can take so long to get the screw out and back in. Rather, we depend upon upkeep to keep nuts tight. We do not utilize aircraft type rivetsif we did, we most likely wouldn't have any difficulty with riveted connections getting loose.

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When thinking about the engineering of fasteners, we typically think about the robot as a prototype, and not as a saleable industrial item. I wish to counter the point that rivets are not easily removable. Rivets are EXTREMELY easily removable. Certainly care requirements to be required to guarantee you are drilling out the rivet and not the hole under the rivet.

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For something that needs to be added one or two times per competition, rivets are more than acceptable. The top of our lifter this year is hung on by rivets that we will drill out prior to we leave each competition. -Brando I wish to counter the point that rivets are not quickly removable.

Obviously care requirements to be taken to ensure you are drilling out the rivet and not the hole under the rivet. For something that will be removed/added often times during a single competition we would choose screws. For something that requires to be added when or twice per competitors, rivets are more than appropriate.

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- Brando Agreed, we use rivets for structures we do not expect to alter but frequently discover ourselves quickly drilling them to make some changes and reattaching that structure. If we find that the subsystem needs to be gotten rid of or changed, we utilize threaded hardware as a part of the design. If we're securing irreversible structure, we want to use rivets.

Much as I like our regional hardware shop, the pop rivets they equip leave much to be desired. rich2202: Out team began utilizing threaded rivets this year. Drill the hole (or use the existing hole), insert the threaded rivet, and the part can be quickly screwed on and off. Threaded rivetsyou suggest hi-locs? The Typical Joes utilize a lot of rivets, and our experience is that they are much faster to remove and replace, compared to nut-and-bolt attachment in the same hole size and place.