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High Speed Grinding : ウィキペディア英語版 | High Speed Grinding
High Speed Grinding (HSG) is a rail care concept developed by the company Stahlberg Roensch from Seevetal, Germany. It is based on the principle of rotational grinding and serves to grind rails at up to 100 km/h (62 mph). == Background ==
Since roughly the beginning of the 1990s, rail network operators have experienced increasing problems with rail surface defects. Head checks, squats, corrugation and slip waves all contribute to higher maintenance costs, intensified noise pollution, traffic obstructions, and ultimately a shortened rail lifespan. These increasingly common flaws are exacerbated by the growing density and speed of both freight and passenger traffic. The direct consequence of these problems is a growing need for rail maintenance. The primary challenge for modern rail maintenance is that less time is available to perform it due to higher traffic densities. Conventional rail maintenance machines (e.g. rail milling, planing or grinding) working at speeds from 1 to 10 km/h (0.6 to 6 mph) can only work during possession time (track closure) which is in most cases only available at night. HSG allows for working speeds of up to 100 km/h (62 mph), and is deployable within regular traffic.
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