The power tool is a tool powered by additional resources and mechanisms other than the only manual work used with hand tools. The most common types of power tools use electric motors. Internal combustion engines and compressed air are also commonly used. Other power sources include steam engines, direct fuel combustion and propellants, or even natural resources such as wind or moving water. Tools that are directly driven by animal strength are generally not regarded as electrical devices.
Electrical appliances are used in industry, in construction, in gardens, for household chores such as cooking, cleaning, and around the house for driving, drilling, cutting, forming, sanding, milling, routing, polishing , painting, heating and others.
Electrical appliances are classified as stationary or portable, where portable devices are hand-held. Portable power tools have obvious advantages in mobility. However, stationary power tools often have advantages in speed and accuracy, and some stationary electrical appliances can produce objects that can not be made any other way. Stationary electrical appliances for metalworking are usually called machine tools . The term machine tool is usually not applied to stationary electrical appliances for woodworking, although such use is occasionally heard, and in some cases, such as drill presses and bench grinders, the exact same appliance used for both. woodworking and metalworking.
Video Power tool
Histori
Lathe is the oldest electrical device, known to the ancient Egyptians (albeit in a powerful form). The factory of the early industrial revolution era had a battery-powered battery powered by a belt of the upper axle. The main power source is the water wheel or (later) the steam engine. The introduction of electric motors (and power distribution networks) in 1880 enabled the stationary and portable self-powered equipment we know today. The global market for electrical appliances is $ 33 billion (by 2016) and is expected to reach $ 46 billion by 2025.
Maps Power tool
Energy source
Currently electric motors are the most popular choice for stationary electric equipment, although in the past they were supported by windmills, water wheels and steam. Some museums and fans still maintain and operate stationary tools that use these older resources. Portable power tools can be wired or battery powered. Compressed air is an ordinary resource for nailers and paint sprayers. Some tools (called actuated powders ) are powered by explosive cartridges. Tools run on gasoline or oil-gasoline mixtures made for outdoor use; Typical examples include most chainsaws and rope cutters. Another tool such as a torch will burn its fuel externally to generate heat. Compressed air is universally used where there is the possibility of ignition of fuel or steam - such as automotive workshop. Professional-level electrical appliances differ from DIY or 'consumer' appliances by being double isolated and not earthed - in fact they are not allowed on the ground for security reasons.
Security
While hand held electric appliances are helpful, they also produce large amounts of sound and vibration. Using electrical appliances without hearing protection for a long period of time can put a person at risk of hearing loss. The US National Institute for Occupational Safety and Health (NIOSH) has recommended that one should not be exposed to noise at or above 85 dB, in order to prevent hearing loss. Most power tools, including drills, circular saws, belt sanders, and chainsaws, operate at sound levels above the 85 dB limit, some even reaching more than 100 dB. NIOSH strongly recommends using hearing protectors when using these power tools.
Before the 1930s, electrical appliances were often placed in cast metal houses. Heavy metal casting houses, contributing to repetitive use injuries, as well as conductive - often surprise users. When Henry Ford adapted to the needs of World War II manufacturing, he asked A. H. Peterson, the tool manufacturer, to make a lighter, more portable electric drill for assembly line workers. At this point, the Hole-Shooter, a drill that weighs 5 pounds. Was created by A. H. Peterson. Peterson's company went bankrupt after a fire and a devastating recession, but the company was auctioned to A.Feebebert, a former partner at Peterson Company, in 1924 and became the Milwaukee Electric Appliance Company.
In the early 30s, the company began experimenting with thermoset polymer plastic housing. In 1956, under the influence of Dr. Hans Erich Slany, Robert Bosch GmbH was one of the first companies to introduce electric nylon-filled electrical appliances housing.
Power tools include:
See also
- Antiques
- Cutlery
- Garden tools
- Vibration arm arm
- NIOSH Power Tools Database
References
External links
- NIOSH Power Voice and Vibra Database Tool
- NIOSH Sound Meter
- Power Tool History
- Battery Cheap Power Tool
Source of the article : Wikipedia
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