FAQ
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Q2. Might the FTS be easily worn out? Q3. Isn¡¯t the heat treatment on the surface of teeth necessary? Q4. Should we necessarily lubricate the FTS? Q5. What¡¯s the smallest size of the FTS can we have? Q6. What¡¯s the largest size of the FTS can we have? Any restrains for large purpose? Q7. What other kind of mother substances can the FTS made out of? Q8. I doubt the accuracy of finished products fabricated by Waterjet machining center. Q9. How far does the FTS bend? Q10. Isn¡¯t there a vibration on the FTS since the length of the FTS shall be increased ? Q11. How do you design the number of the teeth and the shape of the groove? Q12. Can we use the FTS in replace of the high pressure hose?
Q14. Could backlash be trouble to the FTS at the time of reversed rotation?
Q16. Is there a demerit of the FTS in spite of many merits you¡¯ve already mentioned?
Q 1. Where can FTS applied to? A1. Every machine have power source such as Engine, Motor and etc. which generates rotating force that needs be transformed into another forms of power through the actuator arranged to perform designated motion. Both driving shaft and driven shaft are supposed to be connected firmly and have exactly same axis of rotation while transferring power to one another without losing efficiency. As a matter of fact that having exactly same axis of rotation between two shafts is practically impossible, we apply ¡®Flexible Coupling¡¯ which is one of the linking devices that can transmit power in spite of the small inconsistency of their axis. In addition, we are currently applying sophisticated linking devices acting as a joint such as The Universal Joint or The Constant Velocity Joint for cars and certain machines when it is inevitable that we must connect shafts which do not share the same axis of rotation.
The FTS is a utterly new invention of the shaft which is one of the mechanical linking devices that can transfers large rotating force and bends freely. Since the FTS is a device with simple structure and easy to manipulate to desired bending angle, it is not only very much satisfactory at the substitution of Universal Joint but also enables various opportunities for the design and production of machines with new structure. In other word, the FTS obviously can be applied to every field of machinery. The FTS is rather a component part than end product. Therefore, we expect that manufacturers of existing machineries becoming aware of the FTS and intrigued in using the FTS for their innovative redesign.
Q 2. Might the FTS be easily worn out? A2. Absolutely not. Wearing out on the surface of contacts is negligible and limited due to the following reasons even though it is intuitive that it¡¯s reciprocating sliding motion could eventually cause wear out. (See characteristics of the FTS) - Pressure on the FTS does not reach to the point of wear out because pressure on the surface of teeth is divided and distributed to each tooth preventing concentration of pressure. - As the whole bent angle of FTS is formed by the accumulation of sliding distance of all grooves, the length of sliding contacts applied to each single tooth is relatively small and it restrains scratched damage hardly to occur. - Although wearing out occur during the early stage of the operation, it make contacts broadened and rounded and help stabilize the FTS in motion. Thus, using abrasive to accelerate wear out on purpose during the manufacturing process might be a good idea. - Applying lubricants is quite convenient and the lubrication effect is great due the oil film on the contact surface formed by its reciprocating motion. - Similar reciprocating sliding motion has been taken by ¡®The Constant Velocity Joint¡¯ for cars but the FTS is theoretically outstanding in many ways such as travel distance, concentration of weight, wear out and conveniences when lubricating. - In addition to above characteristics of the FTS, we have figured out the way to nearly eliminate even the smallest wear out by carrying on the research into interrelationsof shapes of the teeth on the FTS. We have found the possibility to minimize contact point¡¯s travel distance by less than 20%. Please contact us for more detailed technical information since it is a professional field of the study.
Q 3. Isn¡¯t the heat treatment on the surface of teeth necessary? A3. That¡¯s a good pointing out. We might have to design the FTS strong enough with no need of the heat treatment under normal operating conditions. The heat treatment shall be supplemented if it is required to reduce wear out when design condition had been restricted to use small FTS running under the severe environment. In that case, we shall perform the heat treatment focused on prevention of deformation of the FTS after settling the teeth through the grinding process. The grinding process might be necessary again after the heat treatment or it is may be the best idea to cut and grinding finish on the teeth after the heat treatment. We haven¡¯t manufactured the FTS with the heat treatment since we are currently on the verge of revolutionary creation but we would like to continue research on this theme for manufacturing more compact and strengthened FTS
Q 4. Should we necessarily lubricate the FTS? A4. Lubrication might help preventing noise, vibration, wear out and etc. for the FTS in high speed operations. Just by simply blocking both ends, dressing the cover tube around the FTS and pouring the lubricant to flow inside, it will enable sufficient lubrication. It would be enough not to lubricate the FTS if noise and wear out are not considerable and rather too complicate to keep the FTS lubricated especially when the FTS is applied in tools or machines which are not often used at the site. Besides, it is troublesome to make additional precise machining to seal lubricants secured in the FTS and it would be possible to make simplified lubrication in low speed operations by putting high viscosity grease in the cover tube and using such as a dust seal boot to cover the contacts of the teeth to prevent outside materials from coming in and mess up lubricants.
Q 5. What¡¯s the smallest size of the FTS can we have? A5. The smallest size of the FTS we can get depends on the manufacturing capability for making precise teeth pattern on small pipes. The smallest size of the FTS we can manufacture by using the Waterjet machining center is the FTS with diameter up to 20mm and it is supposed to be feasible up to 10mm by using the Laser cutting tool that we haven¡¯t tried so far. We don¡¯t think there is large demand on the supply of the FTS with such small diameters nor much benefit to the point of both practicality and economical efficiency neither. But we shall develop the FTS with diameters less than 10mm available if there is big demand in the future. As we address,¡±Necessity is the mother of invention.¡±
Q
6. What¡¯s the largest size of the
FTS can we have? Any restrains A6. It depends on the availability of market supply of the large pipe material and how thick the Waterjet machining center can cut the pipe wall. The Waterjet machining center can cut the thickness up to 2 inches; so to speak, almost all pipes with large thickness are applicable. Note that the large diameter of the FTS would be in the range below 100mm and maximum 200mm for the purpose of transmitting ever greatest rotating force, manufacturing the FTS for all kind of purpose is practically feasible as long as the pipe material is available in the market.
Q 7. What other kind of mother substances can the FTS made out of? Can the FTS made out of light plastics? The FTS is amazing! I am the manufacturer of medical tools and I think it would look really good if I make some tools for bowlegged with the FTS but it would be too heavy since the FTS is made out of steel. A7. The FTS can be made out of any substances. As long as the mother material is available in the shape of the pipe, we can manufacture the FTS by using Waterjet machining center no matter how hard if it is glass, plastics or etc.
Q
8. I doubt the
accuracy of finished products fabricated by Waterjet machining center. A8. You provably have the similar picture of the automatic gas cutting machine.
You will understand that the Waterjet machining center is highly accurate tool
once you look at the FTS especially on the finished grooves. The Waterject machining center contains the DC Servo Motor which has accurate limit of resolution manipulated by the computer program that prevents errors from accumulating especially when it divides angles and makes it to revolve 1 circle in 400,000 pulses so we can manipulate distances of the pitch on teeth utterly same each other and secure the consistency of ideal distant between teeth
Q 9. How far does the FTS bend? A9. Bent angle of the FTS can exceed even more than 180 degrees meaning that it is applicable to any circumstances. It is a benefit which is quite revolutionary with the fact that the Universal Joint can only assure 10 degrees of bend usually.
A10. You provably had been using the Flexible Shaft for transferring weak rotating force to hand tools which is made of steel wires twisted together forming a shaft that vibrates spontaneously due to the instability of its center of rotation. When torque is applied, each section of the FTS automatically relocates its position itself and aligns stable balanced center transmitting rotating force. The faster the speed of spinning on each sections become, the easier sections of the FTS find its own stable position as if top with a high speed of rotation becomes stable on its axis of rotation. We suspected vibrations on the FTS at the
beginning. But we¡¯ve found quite ironic outcome and relief to the FTS during
the test operation that joints of sections centered themselves automatically
and secured stable rotating characteristics. The FTS has tendency to hang down due to its weight when both supporting ends are far apart in order to make a large bent angle. If torque applied becomes large enough, the FTS would have more force to reposition itself on the center of motion but it would still be remained hung down a little while rotating. It would hinder smooth operations of the
FTS if the distant is too long between ends causing the FTS unnecessarily over
hung down. In this case, we can install bearing housing in the middle to
support the FTS but necessity of extending the FTS so long is unlikely to
happen.
Q11. How do you design the number of the teeth and the shape of the groove? A11. It seems that you are versed in the field of mechanical engineering. According to our study, concept of the design on the teeth of the FTS is the same as that of the mechanical gear. The size of a tooth is called ¡®Module¡¯ and the size of the pitch circle comes from multiplying ¡®Module¡¯ by the number of the teeth for the mechanical gear. We can apply the same concept
that the size of the FTS pipe comes from multiplying the size of a tooth by the
number of the teeth on the FTS. (Size of FTS teeth) x (Number of teeth) =
(Size of FTS Pipe) Diameter of the FTS pipe and the size of the teeth are supposed to become greater if the force applied is larger and this is our assignment to figure out the governing rule to array the appropriate number and the size of the teeth on the proper size of the FTS pipe. We hope that as many scholars in the field of mechanical engineering study the FTS and obtain doctor¡¯s degree with their outstanding thesis. We believe
what we had found is little to many subjects which we should have had been studied
on. The FTS with a few numbers of teeth can transmit large power but the FTS
with lots of small teeth has more rows of grooves feasible within the short
distance which could prevent hanging down in large bent angles and decrease
vibrations and noises assuring smooth operation and consistency hence, the size and the number of the
teeth should be efficiently decided in consideration of the speed of revolutions, bent
angle and the power, to be transmitted, etc.
As scientists studied and invented ideal teeth on mechanical gears such as Involute type and Cycloid type, the FTS shall also tremendously improve its feasibility through the research and invention of the various types of the teeth and grooves.
Q12. Can we use the FTS in replace of the high pressure hose? A12. We haven¡¯t checked
possibilities of the FTS used in substitution of the high pressure hose besides;
the high pressure hose is much more economical at this time. The FTS could be
used as protection cover or reinforcement covering dressed on outside surface of
the high pressure hose which has internal pressure in very special cases.
Q13. Where is the FTS available? How much is the price of the FTS? A13. Launching the FTS at the market in forms of standardized end products is quite troublesome. Since the FTS has innumerous opportunities of adaptations to various purposes, applying the FTS requires more specific intension from manufacturers to adopt the FTS in their innovative design of machineries for example in the substitution of the Flexible Joint, the Universal Joint and etc. And the FTS is a component part for machines with complete new mechanisms that could lead revolutionary invention and development of machines with brand new structures which is unprecedented. We would like to license the patent and manufacturing technique of the FTS to whom has devotion to apply the FTS in his new design. We would also have the option to develop the FTS as end products in the future but we would like to focus on more about research on its basics, manufacturing technique and representing the FTS in the market since capabilities of the FTS is rather too enormous.
Q14. Could backlash be trouble to the FTS at the time of reversed rotation? A14. Yes, it could. The total amount of
backlash is the same as the width of the single groove multiplied by the number
of grooves since grooves overlap each other. This is an only demerit of the FTS
that there is time lag which is unacceptable in some conditions during backlash
due to the frequent changeover of reversed rotation. Making the width of the
groove smaller, modifying the teeth, pulling or bending the FTS could manipulate
getting the gaps between grooves narrower, and the backlash might have been reduced to a level of practical use. Fulfilling oils with high viscosity to absorb impacts and other method to treat backlashes could be carried on to get rid of the bad effect of backlashes. We hope to keep on modifying and developing the FTS with no demerits especially on backlashes because we believe that there could be some demerits at the beginning since we are on the verge of tremendous dedication of the FTS to the industries. Positive and constructive idea changes the world!
Q15. I think there is a problem for the usage in lieu of automobile's CV joint since FTS has the back lash. I have worked for the company who manufacture CV joint for the automobile. The back lash of CV joint is controlled severely to the micron degree. I heard FTS has the back lash of 'mm' degree. FTS cannot be used for the alternatives of Automo;ile's CV joint for this reason, can it?
A15. I don't think like that. As you know well, the current CV joints have the mechanism which have the inner and outer ring with several steel balls in them at the connecting point between driving shaft and the driven shaft. Thus big back lash means the poor machining of the joint, which cannot transfer the power properly and results in the damage easily. Therefore little back lash is most important in the current CV joint. However FTS deliver the power with direct contact of the teeth and there are no effect on the power transmission even though big back lash. What considering point, we think, is that the back lash can give the effect on the performance of the machinery. You can understand easily FTS's back lash cannot effect the performance of the automobile's forwarding and backwarding considering the power transmission devices such as the clutch and the gearbox. In conclusion, the reason of controling the severe back lash of the CV joint is not on the matter of the automobile's performance but on the precise machining matter of the structure of the joint. It is the misunderstanding from the fixed viewpoint that appling the CV joint's criteria to the FTS. FTS' back lash have no problem on the general power transmission except the special usage such as CNC and Machining center's case requiring the precise control of the location
Q16.
Is there a demerit of the FTS in spite of many merits you¡¯ve A16. This is a right question. There
isn¡¯t any demerit of the FTS we found. It was quite a present shock for us to find out that there are some unique merits of the FTS even though it looked a little loose as we were carrying on the research. By the way, there is some restrains for
the operation due to the backlashes as mentioned before by Q14. Though, applying
the FTS to environment of frequent rotation change would not be often, this problem
can be solved by researching the way to prevent or diminish backlashes
afterwards. Besides, processing grooves of the teeth requires special equipment which is the Waterjet machining center unlike a lathe or milling machines are commonly used. And among the Waterjet machining center, the one for cutting pipes is sophisticated and not so common.
It is becoming a trend that the Waterjet machining center being used and
one can easily start to manufacture the FTS with a little bit of investment
since we would like to license the information and techniques of the Waterjet
machining center which is the special tool for modifying pipes of the FTS along
with the manufacturing technique and patent.
A17. Yes, we made several prototypes of the FTS and tested. We learned special characteristics of the FTS as a consequence. Perfect performance of the FTS can only be assured by proving its durability through operations with the actual force applied but we haven¡¯t tested the prototypes of the FTS for specific purpose at certain place while most prototypes and tests that we prepared were mainly for the study of the FTS. But we do have fabricated a test set with actual force applied to demonstrate the performance and durability of the FTS and we are currently displaying test sets in many exhibitions. The first product that applies the FTS is our newly designed Monopump which is now on the test procedure just before manufacturing. Every necessary test shall be completed and we hope to launch the product with guarantees of performance and durability by the end of this year. This would be the first end product ever launched which is equipped with the FTS. Giving out data sheets compared with existing products is useful and convenient method to prove its performance and gain its reputations in public but it is not the case for the FTS since the FTS has no matching product and vast variety of applications in its purposes. But we have a plan to test the FTS with prototype in the place for the substitution of The Constant Velocity Joint in vehicles and open in public about the test data. Please be a little patient for the remarkable outcomes.
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MONAS Pump Co.,ltd.(www.monas.co.kr,
82-31-499-6966) . |
