The Design Development of the Sliding Table Saw Towards Improving Its Dynamic Properties
Abstract
:1. Introduction
2. Spindle and Main Driving System
2.1. Design Variants of Main Spindles
2.2. Static and Dynamical Properties of Spindles
3. Dynamic Properties of the Machine Tool
3.1. Dynamic Properties of the Main Driving System
3.2. Dynamic Properties of the Machine Tool Body
4. Conclusions
- In modern design solutions of sliding table saws, the main circular saw blades are clamped by means of collars on spindles with a short support spacing with a ratio of the supports spacing L to the inner diameter of the front bearing d of about 3. It ought to be emphasized, that excessive increase in the diameter of the front bearing d and simultaneous striving for the optimum support spacing is not possible with the sliding table saws, as every manufacturer aims for the smallest possible dimensions of the cutting unit.
- To evaluate the dynamic properties (behavior) of the spindle it is useful to determine their critical values of rotational speeds. The maximum deformations determined in static structural linear analyses showed that in the case of the Fx550 saw spindle they are 10× smaller in comparison with the spindle of the Fx3 saw, which made it possible to estimate critical speeds, which satisfied the inequality presented in Equation (2).
- The use of only rational imitation in the spindle design on the basis of the other sliding table saws produced does not lead to the expected effect in the form of correct spindle operation, and this mainly concerns the possible exceeding of the tool’s lateral runout value.
- The errors on sawn surfaces caused by the tool’s lateral runout value can be more apparent especially in case of top wood composite boards (MDF, HDF, LVL, plywood or particle boards) in the sawn package.
- An application in a new machine frame body of steel sections connected with special lockers instead of the solution which based on a set of bent body parts between flat steel plates resulted in lower noise values of around 5 dB during idling.
- If the noise of the machine tool is decreased and simultaneously vibrations are at lower level, hence, it could be expected higher accuracy of sawing which is especially important in furniture production.
- Experimental values of vibrational velocities (RMS or peak value of vibrational velocities) on basis of a few diagnosis standards allowed us to classify the examined main spindle system of the sliding table saw Fx550 as good or admissible design solution from the point of its dynamics.
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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RMS of Vibrational Velocities, vΣ mm·s−1 | Peak Value of Vibrational Velocities, vmax mm·s−1 | |
---|---|---|
Experimental Results | 2.08 | 3.27 |
Standards | Diagnosis | Range RMS of vibrational velocities for diagnosis, mm·s−1 or *range peak value of vibrational velocities, mm·s−1 |
IRD Mechanalysis | Admissible | 2–4 |
VCI Ltd. | Good | 1.27–2.54 |
Blake | Admissible | *2.20–6.00 |
Łączkowski | Good | *2.50–6.30 |
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Orlowski, K.A.; Dudek, P.; Chuchala, D.; Blacharski, W.; Przybylinski, T. The Design Development of the Sliding Table Saw Towards Improving Its Dynamic Properties. Appl. Sci. 2020, 10, 7386. https://doi.org/10.3390/app10207386
Orlowski KA, Dudek P, Chuchala D, Blacharski W, Przybylinski T. The Design Development of the Sliding Table Saw Towards Improving Its Dynamic Properties. Applied Sciences. 2020; 10(20):7386. https://doi.org/10.3390/app10207386
Chicago/Turabian StyleOrlowski, Kazimierz A., Przemyslaw Dudek, Daniel Chuchala, Wojciech Blacharski, and Tomasz Przybylinski. 2020. "The Design Development of the Sliding Table Saw Towards Improving Its Dynamic Properties" Applied Sciences 10, no. 20: 7386. https://doi.org/10.3390/app10207386
APA StyleOrlowski, K. A., Dudek, P., Chuchala, D., Blacharski, W., & Przybylinski, T. (2020). The Design Development of the Sliding Table Saw Towards Improving Its Dynamic Properties. Applied Sciences, 10(20), 7386. https://doi.org/10.3390/app10207386