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Deburr
There are many deburring processes, but the most common are mass-finishing, spindle finishing, media blasting, sanding, grinding, wire brushing, abrasive flow machining, electrochemical deburring, electropolishing, thermal energy method, machining, water jet deburring, and manual deburring.[5]
Manual
Manual deburring is the most common deburring process because it is the most flexible process. It also only requires low cost tools and allows for instant inspection.[6] Manual deburring is either done with tools like scrapers, files, sandpaper, stones and reamers or with handheld power tools that use abrasive points, sandpaper, or cutters similar to those used to deburr during machining.
Electrochemical
Electrochemical deburring is the use of electrochemical machining to deburr precision work pieces and edges that are hard-to-reach, such as intersecting holes. The process uses a salt or glycol solution and electricity to dissolve the burr. The electric current is applied with a specialized tool to reach the burr location. Burrs are removed in 5 to 10 seconds, while the rest of the work piece is unaffected.[6]
Thermal
Thermal energy method (TEM), also known as thermal deburring, is a deburring process used to remove hard-to-reach burrs or burrs from multiple surfaces at the same time. The process uses an explosive gas mixture to provide thermal energy to burn off the burrs. It is the fastest burr removal process, requiring only 20 milliseconds to remove a burr.[7]
The process starts by loading the workpiece into an explosion-proof chamber, which is then sealed and clamped with approximately 220 metric tons (240 short tons). The chamber is then evacuated of air and filled with an oxygen and fuel mix; this mixture is pressurized to 0.5 to 1.9 MPa (73 to 276 psi). An electrical igniter then ignites the mixture, which burns for approximately 20 milliseconds, causing all of the sharp corners and burrs to burn away. The peak temperature reaches 3,000 °C (5,430 °F).[7]
Somerset (/ˈsʌmərsɪt, -sɛt/ ⓘ SUM-ər-sit, -set;[2] archaically Somersetshire /ˈsʌmərsɪt.ʃɪər, -sɛt-, -ʃər/ SUM-ər-sit-sheer, -set-, -shər) is a ceremonial county in South West England. It is bordered by the Bristol Channel, Gloucestershire, and Bristol to the north, Wiltshire to the east and the north-east, Dorset to the south-east, and Devon to the south-west. The largest settlement is the city of Bath, and the county town is Taunton.
Somerset is a predominantly rural county, especially to the south and west, with an area of 4,171 km2 (1,610 sq mi) and a population of 965,424. After Bath (101,557), the largest settlements are Weston-super-Mare (82,418), Taunton (60,479), and Yeovil (49,698). Wells (12,000) is a city, the second-smallest by population in England. For local government purposes the county comprises three unitary authority areas: Bath and North East Somerset, North Somerset, and Somerset. Bath and North East Somerset Council is a member of the West of England Combined Authority.
The centre of Somerset is dominated by the Levels, a coastal plain and wetland. The north-east contains part of the Cotswolds uplands and all of the Mendip Hills, which are both national landscapes; the west contains the Quantock Hills and part of the Blackdown Hills, which are also national landscapes, and most of Exmoor, a national park. The major rivers of the county are the Avon, which flows through Bath and then Bristol, and the Axe, Brue, and Parrett, which drain the Levels.
There is evidence of Paleolithic human occupation in Somerset, and the area was subsequently settled by the Celts, Romans and Anglo-Saxons. The county played a significant part in Alfred the Great's rise to power, and later the English Civil War and the Monmouth Rebellion. In the later medieval period its wealth allowed its monasteries and parish churches to be rebuilt in grand style; Glastonbury Abbey was particularly important, and claimed to house the tomb of King Arthur and Guinevere. The city of Bath is famous for its Georgian architecture, and is a UNESCO World Heritage Site. The county is also the location of Glastonbury Festival, one of the UK's major music festivals.
