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Deburring
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]
Gloucestershire (/ˈɡlɒstərʃər/ ⓘ GLOST-ər-shər, /-ʃɪər/ -sheer; abbreviated Glos.)[1] is a ceremonial county in South West England. It is bordered by Herefordshire to the north-west, Worcestershire to the north, Warwickshire to the north-east, Oxfordshire to the east, Wiltshire to the south, Bristol and Somerset to the south-west, and the Welsh county of Monmouthshire to the west. The city of Gloucester is the largest settlement and the county town.
The county is predominantly rural, with an area of 3,150 square kilometres (1,220 sq mi) and a population of 916,212. After Gloucester (118,555) the largest distinct settlements are Cheltenham (115,940), Stroud (26,080), and Yate (28,350).[2] In the south of the county, the areas around Filton and Kingswood are densely populated and part of Bristol built-up area. For local government purposes Gloucestershire comprises a non-metropolitan county, with six districts, and the unitary authority area of South Gloucestershire.
Gloucestershire is bisected by the river River Severn, which enters the county near Tewkesbury and forms a wide valley down its centre before broadening into a large tidal estuary. The hills to the east form the majority of the Cotswolds AONB, and the uplands to the west are part of the Forest of Dean and the Wye Valley AONB, which stretches into Wales.
Gloucestershire was likely established in the tenth century, and expanded to approximately its current borders in the eleventh. The county was relatively settled during the late Middle Ages, and contained several wealthy monasteries such as Tewkesbury, Gloucester, Hailes, and Cirencester; the Forest of Dean was also a major iron-producing region in this period. The city of Bristol became an independent county in 1373, by which point it was the third-largest in England. The county was not heavily industrialised during the Industrial Revolution, however the Port of Gloucester was expanded with new docks and the small Forest of Dean coalfield was exploited
