Talk to your manager/boss.  Explain to them the ways you've improved your output and how that could be applied to your colleagues (like you've done in the post).

From there, your manager will either appreciate your improved methods or they will be indifferent about them (I strongly doubt they will dislike your methods). If they appreciate them, they may even help get yourself and the rest of your colleagues better equipment so your colleagues can be using the same equipment you are.

Regardless, your manager knowing that you are doing better work because of your own initiative is important and should stick out as a major positive to your manager.  I can't see any reason why this would even remotely result in you being fired unless there are some sort of VERY SERIOUS restrictions against automating functions of your job (again, incredibly unlikely). Seems like the others trying to scare you into submission.  

My recommendation is to continue what you're doing, keep offering to help colleagues, and keep your manager informed on how your making the process more efficient.  If your co-workers continue to be mad, it's likely because they just don't want to learn your new methods or they're worried it will make part or all of their job obsolete.  That's not your problem, that's theirs.