Re: Titanium Carbide Guides
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les cline (---.dsl.kscymo.swbell.net)Posted by:(---.dsl.kscymo.swbell.net)
Date: July 24, 07:07PM
Just like a blank, a guide has no pre-determined function. Some guides are designed for more or less specific purposes and applications, but there is no rule saying you can only use such and such guide for such and such rod. Use multiple types of guides on the same rod if it improves the casting, comfort, or looks. There are practical considerations; I do not like to use roller guides on lightweight flyrods...but the guides and blank could care less; they will behave as they were designed to behave. There are lots of choices out there...and I am learning to see all the components as tools to achieve my goals: beauty, efficiency, and user-friendliness...or whatever you determine them to be.
I believe it comes down to saving as much weight as you can by using the smallest guide that will still do the job.
There are lots of guides out there because of these reasons, IMO:
*price point (variations in grades of materials and manufacturing processes)
*competition between companies (I can build a better 'fill-in-the-blank' guide than you)
*purpose (heavy-duty saltwater to light duty freshwater)
None are good or bad...do they fit the purpose for my build?
And then there is all the marketing hype...some more true than others. No manufacturer is going to say, "Try our guide if you want shorter casts with more effort."
Just my thoughts. Experiment and learn as much as you can.
Les
Full article here
Sintered titanium carbide has been extensively used since the early s for demanding wear-resistant applications and, in particular, in environments characterized by high temperature and oxidation. Thanks to its physical characteristics, especially its low density, titanium carbide (TiC) has been successfully applied in the manufacture of cassette guide rollers for hot steel rolling. However, the peculiar characteristics of the sintered Ti carbides make it difficult their redressing and hence this has always represented the limit for a more extensive application. Very often iron based alloys are preferred even if, in general, they are less cost effective just because they are easier to be redressed by turning.
The availability of a simple, compact, fully automatic and reasonably priced CNC machine; specialized in the grinding of guide rollers and able to operate accurately and efficiently -both in contour and in plunge- can definitively solve TiC&#;s redressing problems and render its use even more widespread and attractive.
The wear life is usually measured as tonnage for one go, i.e. tons rolled in the mill before removing the roller to re-dress its groove. The type of re-dressing depends on the maintenance practice of each plant and can be summarized as follows:
Very frequently the maintenance practice is a combination of the above (See Figure 4).
Contact us to discuss your requirements of Titanium Carbide Guide Roller supplier. Our experienced sales team can help you identify the options that best suit your needs.
In reality, to optimize the mill down time, a maintenance practice must take into account the bearing life and the rolling ring wear life.
Sometimes the wear rate is reported as the tons. of bars per millimeter of roll diameter removed. This is simply calculated considering the average amount of material ground out of the roller outside diameter for each cycle and the tonnage rolled for each re-dressing. The effectiveness of this method may depend on whether the rollers are run for low tonnages and removing a very minimum layer of material during re-dressing, or whether the roller is run for large tonnages with a more substantial layer removal at each re-dressing operation.
Sometimes the choice of the roller material is related to other parameters than cost effectiveness, and Ferrotic type rollers may be preferred because they can be machined with a lathe. In reality, the grinding operations on the small TiC rollers are also extremely easy and could be performed with every type of grinder commonly available in any roll maintenance shop.
Anyway, to overcome this limitation, today Atomat has made it available a new CNC grinding machine tailored for this particular application
The Atomat AT701E CNC is in fact a grinding machine specifically designed for the machining and redressing of carbides guide rollers.
The machine is powered with the SIEMENS 840D SL control and can perform contour grinding with extreme accuracy. It operates with electroplated diamond, metal/resin bond diamond and CBN grinding wheels, with an outside diameter of 150mm.
The electroplated wheels are generally preferred since they have an extremely long wear life and do not require any maintenance during their operating life.
The machine can operate both in contour and plunge grinding. When activated in contour, the machine is able to cut all possible profiles, basically with the same grinding wheel.
Being the regrinding cycle fully automatic, the machine requires just a limited operator&#;s attention and thus, it can be installed among other existing CNC machines without increasing the number of operators in the Roll Shop.
For the definition of the roll groove profile and machining parameters, our AT701E functions with an easy and ready-to-use operator interface that makes the programming operations extremely fast that do not require particularly skilled personnel.
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