Cold Heading - Cold forming - Screw Manufacturing - How Screws are Made - Manufacturing Process
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- เผยแพร่เมื่อ 5 ส.ค. 2020
- Watch and learn how a screw is made from raw material
www.smithreps.com
How a screw is made
How its made
Screw production line
How they make screws
Manufacturing of screws
Screw making machine
Screw Manufacturing Process
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Thank you! All the other videos are just "blank goes in machine, screw comes out".
An actual education, as opposed to the previous video I saw on this. I was really just interested in how the threading was done and had no idea it was a compression roll. I thought it would be more like those wood turning machines used to make ornate chair and table legs.
Thanks! There are circumstances where threads are cut/machined instead of rolled. This is done for myriad reasons, mostly based on the type of material and application. Cutting threads weakens the shank (where the threads are) as opposed to rolling threads which maintains its strength. It's all a matter of the grain structure of the material.
I think I came from the same video lol 😂 The guy titled it "how screws are made" and it was just a useless collection of scenery in a factory. I bet his like:dislike ratio is horrible - he has his comments disabled. This is why we need to be able to see the ratio... I've watched 2 utterly useless videos since yesterday and wasted who knows how much time. Too bad TH-cam wants so badly to suppress information from the public 😐
@@trumpatier The music was epic, though! 😂
@@weapons-gradenutella3068 hahaha right
Great video. Very easy for someone who knows nothing about cold heading to understand.
Glad it was helpful!
In many of these video's people are fascinated by the manufacture, I am more interested in the process and that someone actually thought up the machines to provide accurate manufacturing and mould production.
It's pretty nuts, isn't it?
Thank you for this nicely made video. It explains the whole process quite nicely. Well done.
good job
I love when you can see the air
So basically these machines never stop working. Because I definitely never stop using screws and fasteners and I’m just one guy 😁
Haha you are correct in a few instances. Some companies do run their machines 24 hours, 7 days a week and have weekend shifts and overnights scheduled. This is not too common, as it does require a person to be present and aware if there are issues with the machine.
If there are machines running overnight or on the weekend, it's usually when there's an important deadline, an emergency (such as when ventilators were needed during the pandemic), or it's temporary and they are trying to lower their backlog. More often than not, companies run their machines during normal business hours.
I have often wondered if cold punching of wood screws is the reason the heads snap off all too frequently.
No, not necessarily. It’s mostly the material and the operator who are major contributors to poor product
Insightful and definitely satisfied my curiosity!! txh
Glad you enjoyed it!
Thanks great video!
Glad you liked it!
great video, thank you
Glad you liked it!
What machine made the screws that were used to make this screw making machine.
A lathe.
Could have been another cold-forming machine lol. But I get what you’re saying. It’s very likely what the comment above 👆 said - a lathe.
Original machines were held together with nails. Later screws were made by hammering out the head and shank and filing the threads by hand. Whole families would take on this task to “mass produce” early screws.
If the slug is steel, and the form punch is steel, why does the machine shape the screw, instead of the screw deforming the machine? And on a related subject, why do screw heads always flake apart when driven by a screw driver, as if they were made of cheese, while the screwdriver head is not usually damaged? (Unless used on the wrong type of screw?)
The slug can be many materials, so not always steel. The die is made of a specially hardened steel known as "tool steel". The dies are harder than the materials, and only materials that can be cold-formed will be ran through the machine. Others will be heated up and then struck with a die (known as hot forging or hot heading), where the heat makes the material more malleable.
You may be confusing the "drive" with the "head" of a screw. The drive is the recess where the phillips, slotted, or other is engaged and then used to drive the screw into the material. The drive is located on the head of the screw. In either case, the "flaking" happens when the material that the screw is made out of is not as hard as the drill bit or screwdriver being used to install the part. Same will happen to the tool if the screw is a harder material than the screwdriver/drill bit.
Hope that helps!
Fascinating. Thank you!
So glad you enjoyed! Thanks for watching 😃
Corey, could I ask if it would be OK to use some stills from your video for explaining the screw making process in an academic piece. If so what reference would you like to acknowledge where the images came from?
Yes, absolutely! You can reference my channel name: Corey @ Smithreps
Cool
Thanks!
I wonder how many screws can be expected to be made from a die before it needs replacing?
It depends on the material and speed at which each manufacturer runs their machines. Also, there are single die and multi die operations, which would also change the lifespan of a die set. Furthermore, a die set is just that - multiple segments used to create the fastener, all of which wear at different rates. Generally speaking, a good range would be 40,000 - 60,000 strokes before the die needs to be replaced, again based on material, fluid, pressure, speed, and configuration
How are galvinized screws made?
Galvanizing is a secondary process. It is a plating that protects the base material from corrosion. There are a few ways of galvanizing, the most common being "hot dipped aka HDG" (dipped in molten zinc) and the other being "mechanically galvanized", which is an electroplated process
Anyone know who manufactures the machinery?
Chun zu
There are a number of manufacturers all over the world who make cold forming machinery. Chun Zu is one as mentioned already, but that's one of many. National Machinery is one of, if not the, largest
...when your budget doesn't cover a high(ish!) speed camera for actual slow motion - we're talking about 1000FPS or so here, not the 100000-500000FPS specialty stuff the SloMo Guys use...
Thank you for your comment, and thank you especially for the wonderful and helpful content you’re providing too. I’m sure someone of such high stature can appreciate the budget friendly approach many entrepreneurs have 🙏
Hopefully all the machines that made flathead screws have been melted down or sent to hell where they belong. Just sayin'. Really, really hate them.
Most machines that make flatheads can make many other styles (panhead, countersunk, etc). Typically flatheads are used in situations where the head needs to sit flush to a surface, as much as possible. Every aspect and feature of a screw or bolt is there for a specific reason.