What is a central knife?
Published:
2021-11-09
As a form of road plane intersection, roundabout is widely used in our country.
As a form of road plane intersection, roundabout is widely used in our country.
A central island refers to a circular or oval traffic island set in the middle of a plane intersection.
When the left-turn traffic flow is taken as the key traffic flow, the left-turn capacity increases with the increase of the radius of the central island.
The selection of milling tool is mainly the selection of milling cutter type and milling cutter size.
The type of milling cutter should be adapted to the surface shape and size of the workpiece.
Face milling cutters should be selected for machining larger planes; end milling cutters should be selected for machining grooves or smaller steps and plane contours; ball-end milling cutters should be selected for machining curved surfaces; die milling cutters should be used for machining mold cavity or punch forming surface; for machining closed keyways, keyway milling cutters should be used; drum milling cutters should be used for processing variable bevel faces; forming milling cutters should be used for processing all kinds of straight or arc-shaped grooves, bevel faces, special holes, etc.
When rough milling or milling unimportant machining planes, coarse tooth milling cutters can be used; when finishing milling, dense tooth milling cutters can be selected to achieve low surface roughness with a small feed; when milling hard metal, dense tooth milling cutters must be selected and the feed should be small to prevent vibration.
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