Jobs
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]
Hereford (/ˈhɛrɪfərd/ ⓘ HERR-if-ərd) is a cathedral city and the county town of Herefordshire, England. It lies on the River Wye, approximately 16 miles (26 km) east of the border with Wales, 23 miles (37 km) north-west of Gloucester and 24 miles (39 km) south-west of Worcester. With a population of 53,112 in 2021, it is the largest settlement in Herefordshire.
An early town charter from 1189, granted by Richard I of England, describes it as "Hereford in Wales".[2] Hereford has been recognised as a city since time immemorial, with the status being reconfirmed as recently as October 2000.[3][4] Hereford has been a civil parish since 2000.[5]
It is now known chiefly as a trading centre for a wider agricultural and rural area. Products from Hereford include cider, beer, leather goods, nickel alloys, poultry, chemicals and sausage rolls, as well as the famous Hereford breed of cattle.
