Can anyone help me in making Diamond knurl on a 303 stainless steel work blank of diameter 5.89 mm? Attached file here. It should be fine enough.
Hello Jaymin... here is a video showing how... (note,. when you complete,.. the geometry will slow your system down significantly!)
How to create a knurl surface - YouTube
Diamond Knurl on round stock can be done with right and left hand coil cut in the model.
You may want to model the diameter on the knurl bigger then stock because it is bigger after knurling.
An easier approach is use appearance on the surface where the knurl will be. Again you will need to model that area bigger so you can apply appearance on that area and not the whole shaft.
I have my students do one example with physical modeled knurl and another example with cosmetic texture.
Then the question is, "Do you really really need modeled feature?" You have to make a decision based on your Design Intent.
Hi, I need actual feature which can be manufactured. It is requirement. Hope you can help me with that. I also need specs of feature. I.e. Dimensions.
I want actual feature which can be manufactured. Hope you can help with that.
Specs depend a lot on your use and what you want. You can knurl to lots of different sizes.
Maybe look in your Machinery's Handbook?
Jim Steinmeyer wrote: Specs depend a lot on your use and what you want. You can knurl to lots of different sizes.Maybe look in your Machinery's Handbook?
Jim Steinmeyer wrote:
Jim's advise to look in the Machinery Handbook is imperative. A knurl is dependent on the pitch of the knurl to match the base diameter.
However, It is not necessary to model it in order to manufacture it. Knurls and threads are most commonly specified on the drawing with the appropriate notes. The cosmetic display that J. Mather shows is as much as you usually need to do for a visual representation.
The only reason to actually model the knurl for manufacturing it is if the method of manufacture is 3D printing.
I want to achieve "DIAMOND KNURL, 64 PITCH DIAGONAL, CLASS 1." Is that possible to model?
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Don't waste energy modelling a knurl if a machine shop is making it.
a.They don't care.
b. If you change the knurl spec you'll waste gobs of time.
c. It wastes computer resources (helical surfaces are MB and regen hogs).
Jaymin Patel wrote: I want actual feature which can be manufactured. Hope you can help with that.
Jaymin Patel wrote:
But this started as a hatch post: hatch Problem
So, what's now driving the requirement for modelling the knurl, if I may ask?
Is it simply an excercise?
From my experience, knurls are detailed by hatch and specified by text note with before (or after) knurl size dims and possibly locational dimensions, if needed.
The machinist will know what to do with this data.
Male or Female?
Honestly,.. a written spec with a designated Tool (knurl wheel) would be more practical, imho.
It is Male.
We want to achieve this to communicate with our Customers as well as our Manufacturers. My boss wants me to work on it, and get the model right with said specification. we also want to utiliz the rendered part for marketing material.
At any cost, he wants me to learn and make one.
I interpreted the same as you said (From your experience........) and that was the reason I started as a hatch problem. When I reported to my boss, he told me to get this right.
Hope someone can help me with this. I am a beginner and doing my internship.
You can specify the specs in the drawing like shown here: Dimensioning Knurled Features Drawings and for model/rendering use the appearance. You do not need to be accurate as this is for visualization only.
I see that Mr. Salvador beat me to it. Solidworks Tutorial : Creating a Knurl Surface - YouTube. Or that just might be a similar link.. Like every one else has mentioned, it is my opinion that you should use an appearance in your model and spec it in the drawing but it's kinda nice your boss would allow you to explore perfecting the model. Hope your boss has supplied you with a super computer. I did come up with something (from the tutorial) that allows for a good looking slicing up of the model but is not cut to any specific knurl callout. You would have to do the math. Took about half an hour for this to rebuild on my machine. Yea, resource hog for sure and it's still probably not fine enough but easily adjustable (if you have enough machine).
Your boss is ignorant and wasting time and resources. If you need a seasoned professional to tell him so send him my way.
If you need something just for appearances there are other ways, e.g. decals.
Thank you very much for your time. I can play around with math and model if you are okay to share solid work file with me. That would be a great help to learn and explore.
Thank you in advance.
Thank you very much. I was referring to the same video earlier. The problem I was facing was:
What would be the best way to do the math to get the correct profile which can align with standard knurl tools available?
Is this profile Male Diamon Knurl? From my reading, I see that in Male, the points are raised. Have to cut the profile or you have added the profile?
Jaymin Patel wrote: We want to achieve this to communicate with our Customers as well as our Manufacturers. My boss wants me to work on it, and get the model right with said specification. we also want to utiliz the rendered part for marketing material. At any cost, he wants me to learn and make one. I interpreted the same as you said (From your experience........) and that was the reason I started as a hatch problem. When I reported to my boss, he told me to get this right. Hope someone can help me with this. I am a beginner and doing my internship. Many Thanks, Jaymin
Since you need it for presentation, how about applying a knurl decal?
You can make a knurl jpeg from a hatch on a blank drawing as the base for the decal.
I'm thinking this is a viable approach, but please other forumites, especilly those with more appearance/rendering expertise, weigh in on this.
Also, I think Roland Schwarz's opinion of your supervisor is fairly accurate.
That your supervisor is pressing you to apply yourself and dig deeper is good, but he's doing so for what appears to be non-value added tasks (as you've read in many replies here).
This is bad, although there may be some valid reasons your boss has for driving this route.
Regardless, persevere with this, but remember, you are only as valueable as the value you add.
Don't be the $100 answer to the $10 question.
This excercise doesn't sound like it's a lesson in value.
Good luck and cheers,
I'm thinking his boss may very well be testing him and would love to hear him him state something along the lines of what Roland mentioned (maybe with different adjectives though). This brought back memories of me about 54 years ago when I worked in a giant print shop (summer job) and my first day there my boss asked me to gather up 15 (mystical) sky hooks. I went all over the shop asking people who weren't in imminent danger of chopping their hands or fingers off (was somewhat common in those days). Each person would send me to another who was sure to know where I could find them. I learned a great deal that day about the shop and how things operated. Who to contact for when I truly needed information on something. Within a couple of weeks I was one of the most valued employees.
Ah, heck,,, at my age I just like to reminisce.
In the real world knurling is a displacement process, not a cutting process.
In the navy we had the "BT punch".
Roland Schwarz wrote: In the navy we had the "BT punch".
Roland Schwarz wrote:
In the oil field we had Reserve Pit tie downs and Pipe Streachers. It was great the time we had the Worm (rookie) going all over the rig looking for a pipe streacher. He eventually went and asked the Tool Pusher who was the overall boss of the rig and was also new. Before long both of them were digging in the tool shack trying to find it.
If your question is “How do I model a knurled part so that the model accurately replicates an actual real world manufactured part?”, then your question has not been answered. It shouldn’t matter why you want to do this.
Knurled part geometry is dictated by the knurling process not the designer. Therefore, you must completely understand the process before you can model an accurate representation.
This web page has everything you need. https://www.accu-trak.com/technicalinfo.html Be sure to understand how to calculate pre-knurl blank diameter and the resulting knurl outside diameter. In Solidworks, the formula for Knurl Helix Pitch = Blank Dia. X PI / Tan (Centerline Helix Angle)
Take a look at the attached part file and experiment with it.
The design table has red cells that you can easily change. My company has several knurled part families that use this same modeling method. Once our manufactured knurled parts are completed, they always match our CAD models. We only use Diametral Pitch knurls as they track perfectly on the 1st revolution which is the key to getting beautiful and sharp knurls. If you want to use Circular Pitch knurls, the design table formulas I created will have to be modified.
People have mentioned valid concerns about Solidworks performance when doing this. We have knurls suppressed by design tables when we don’t need them. When we do need them (3D printing, illustrations, and several other reasons), we accept and deal with the degraded performance. I’d like to add that if Solidworks would fix bugs and make Geometry Patterns work reliably with parts that have multiple configurations, patterned helix features would be much more tolerable to use.
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