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Effect of Various Bearing Design Parameters on the Operating
Temperature of Hydrodynamic Journal Bearing
--K Tripathi, S Rajput and S Gadakh
The paper deals with the bearing design based on the heat balance, i.e., heat generated inside the bearing should be nearly equal to the heat dissipated from the bearing housing to the surroundings. The analysis is based on computer-aided bearing design process. As it is an iterative process of bearing design, the use of computer provides more accurate, optimum, easy and fast calculations. The paper presents the effect of various parameters such as oil grade, lubrication system, bearing housing geometry, R/C and L/D on the operating temperature of the bearing. © 2013 IUP. All Rights Reserved.
Pattern and Feeder Design for the Production
of Gray Cast Iron Brackets
--Mary Adebola Ajiboye, Matthew Sunday Abolarin
and Johnson Adegbenga Ajiboye
In this paper, the design and production of sand casting for a gray cast iron bracket was carried out. The bracket was divided into different sections called Appendages A, B, C and D, and Ribs E and F. Efficient feeder design is important so as to minimize casting defects such as porosity and incomplete filling to the barest minimum. The feeder or riser is used to feed metal to the casting as it solidifies; therefore they are designed and positioned such as to ensure filling the cavity during solidification. The implication of this is that the riser must be designed to be large enough so that it solidifies only after the casting and it should contain a sufficient volume of metal capable of supplying the shrinkage contraction which occurs on cooling from the casting temperature to the completion of solidification. Based on the feeder design in this work, two bracket castings were produced. © 2013 IUP. All Rights Reserved.
Implementation of Kaizen Techniques in TPM
--M S Prabhuswamy, K P Ravikumar and P Nagesh
Kaizen is a cost-effective and customer-friendly strategy, which calls for small incremental improvements. It is one of the eight important and distinct pillars of Total Productive Maintenance (TPM). In TPM, there are some parameters considered vital to attain dual goals of quality and productivity. Manufacturers have to meet customer satisfaction through Continuous Improvement (CI) in the quality of products and services delivered. The concept of CI is based on Deming’s P-D-C-A cycle which deals with the shortfall and sources of variability that deviate from quality output and improving the process to eliminate undesirable results. Thus for an industry, to achieve significant improvements in the service or quality of the products delivered, it is important to implement and practice the Kaizen program. The objective is to achieve reduction in breakdowns by implementing TPM activities using Kaizen and autonomous maintenance. © 2013 IUP. All Rights Reserved.
Investigation of Mechanical and Tribological Properties
of Polymer Composite Material: A Review
--Abhay Kakirde, Kartikey Tripathi, Vishal Achwal and Shilpa Tripathi
The use of polymer composites in various tribomechanical situations has become more popular nowadays. The paper reviews the research done in the area of investigation of the mechanical and tribological properties of the polymer composite material. The present overview describes some of the researchers’ approaches to designing various mechanical and tribological testing of polymeric composites for operating under low friction and low wear. Special emphasis is laid on reinforced polymers with special fillers, including nanoparticles. © 2013 IUP. All Rights Reserved.
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