RAMMER 255E, Руководство оператора

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Operation - Page 25 COPYRIGHT © 2020 SANDVIK MINING AND CONSTRUCTION OY
Operation 255E
Noise dampening
Operating the hammer near residential areas or other noise sensitive areas can cause
noise pollution. In order to avoid unnecessary noise, please follow these basic rules:
1. When operating the hammer, keep the tool at a 90 degree angle to the material
and the feed force in-line with the tool.
2. Replace or fix all parts that are worn out, damaged or loosened. This not only
saves your hammer but it also decreases the noise level.
PRINCIPLES OF BREAKING
To increase the hammer's working life, pay particular attention to correct working
methods and how to choose the correct tool for the job. There are essentially two
ways of breaking with a hydraulic hammer.
Penetrative breaking (or cutting)
In this form of breaking a moil point or chisel tool is forced inside the material. This
method is most effective in soft, layered or plastic, low abrasive material. The high
impact rate of the small hammers makes them ideal for penetrative breaking.
Impact breaking
With impact breaking, the material is broken by transferring very strong mechanical
stress waves from the tool into the material. Impact breaking is most effective in
hard, brittle and very abrasive materials. The high impact energy of the big
hammers makes them ideal for impact breaking. The best possible energy transfer
between the tool and the object is achieved with a blunt tool. The use of a chisel tool
in hard material will cause the sharp edge to wear very quickly.
CHOOSING TOOLS
A selection of standard and special tools to suit each application are available. The
correct type of tool must be selected to get the best possible working results and
longest life time for the tool. Choosing the best tool type for an application may
require some testing, please consult with your local dealer. See “Tool
specifications” on page 64.