There are a wide variety of resins used in construction machinery, and they are also used in important components. In the application, durability under severe use environment such as resistance to heat and water and high mechanical strength is required. Methods such as pyrolysis gas chromatography-mass spectrometry and infrared spectroscopy are mainly used in the analysis of resins, and the resin is analyzed by comparing these analytical data with a reference chart. However, the high-strength urethane resin used at the site where the application of the elastomer is required is composed of a combination of three components. In addition, since one of the components, alcohol, is a polymer, it is substantially equivalent to analyzing two mixed polymers. Therefore, it is difficult to adapt the analysis using the existing resin reference. In this paper, the analysis method of urethane resin was examined, and its structural analysis is reported.
The Komatsu GARA-PAGOS Series machine equipped with a wood crusher will be remodeled as Model 3, for the first time in 14 years since the release of the current, Model 2, in 2006, in conformity with the 2014 Japanese standard for exhaust gas from domestic non-road machines. Model 3 has incorporated the installation of a dust collector, safety, and improved usability as well as the conformity with the exhaust gas regulations. This paper introduces its main features.
Labor shortage has been a serious problem in worksites operating construction machineries. To secure the production amount while maintaining the quality, the productivity improvement through manpower reduction, greater efficiency, and sophistication in production is necessary. We would like to report the study and the applicable cases of the productivity improvement by visualization of construction machinery operation utilizing ICT/IoT implemented for this problem.
Komatsu NTC has been involved mainly in business of manufacturing and selling (marketing) of cutting work line for engine parts. Seeking for a manufacturing system synchronized with assembly as the next generation manufacturing line, a smart line to achieve DANTOTSU (unique and unrivaled) productivity and quality has been delivered to Komatsu Oyama Plant and started its operation in 2019. (Refer to Fig. 1) In addition to introduction of jig fully-automated initial setup, in-process measurement, automated exchange of tooling and centralized line management system with a large screen, a technology to monitor manufacturing state has been built by associating machining data, precision of processed products and tool information with the system. As we have developed a horizontal machining center NX400-667 (refer to Fig. 2) to be core of the manufacturing line, its overview is introduced here.
To conform to the Tier4 Final emissions regulations, which has been enforced since January 2014 and January 2015, it became necessary to significantly reduce the amount of nitrogen oxides (NOx) and particle matter (PM) than the former regulations. To meet the more restrictive emissions regulations while maintaining the performance, reliability, and durability of the engine equivalent to or even better than the existing products, we have developed and succeeded in productizing a new series of 23 L class engines, featuring Tier4 Final overcoming technologies.
