TH61177B - Drill bits - Google Patents

Abstract

DC60 (30/08/56) to provide drill bits, which can greatly reduce cutting resistance and achieve Capable of being easily operated by manpower using a hand drill, a drilling machine or the like, one drill has a cutting edge arranged in a symmetrical manner along the axis of rotation. each having Make it thinner at the tip of the drill bit. Such boundaries are structured from the cutting edge. which is thinner (1) that extends into a shape that includes a curve from the edge of the hammered piece to The side that surrounds the outside of the drill bit and the main cutting edge (2) protruding from The tip of the solid edge is thinned to the tip surrounding the outside of the drill. When viewed from the drill side and a thinner surface was created using a cutting edge of size. Thinners are then formed to resemble a parabolic slanting in the direction of the drill bit. When viewed from the front of the drill bit to provide a drill bit which can greatly reduce the cutting resistance and make The ability to easily operate by manpower using a hand drill. Drilling machines or the like, a drill bit has a cutting edge arranged in such a way that is symmetrical along the spindle and is Make it thinner at the tip of the drill bit. Such boundaries are structured from the cutting edge. with a thinner size (1) which extends into a shape that includes a curve from the edge of the hammered piece to The side that surrounds the outside of the drill bit and the main cutting edge (2) protruding from The tip of the solid edge is thinned to the tip surrounding the outside of the drill. When viewed from the drill side and a thinner surface was created using a sized cutting edge. The thinner will be made to form a shape similar to the paralora tilted in the direction of the drill bit. When viewed from the front of the drill bit

Claims (1)

Claims (total) which will not appear on the classifieds page :Revised 20/9/2017 1.Drill bits with a slimmed-down action, which are assembled together. with two cutting blades arranged symmetrically around the spindle. It consists of a thinner blade that protrudes from the edge of the hammer part. to the surrounding side of the drill to form a shape that includes the arc and main blade protrusion. from one end of the thinner cutting blade to the surrounding tip of Drill bit as viewed from the tip of the drill bit where the convex ridge of the contact part between the slits for ejecting the scrap material and The thinner surface, which is shaped by the cutting blade, is predominantly u-shaped, slanting towards the direction of the drill bit and to the direction of the drill bit. where the convex ridge shifts from the side which is a cutting blade that is thinner to the main blade side as it moves away from the tip of the Drill to the tip side when viewed from the front of the drill, which is the exposed side of the such channels and where the scraping angle (formula)1 caused by the cutting blade and the scraping angle (formula)2 caused by the cutting blade having such a thinner size will follow the relationship. (Formula)1>(Formula)2>0o except for the part which is under the part hammered into the position that is close to each other ---------------------------------------------------- -- (Original) 1. Drill bits with end tributes which have a slimming action which assembles It includes two cutting blades arranged symmetrically around the spindle. It consists of a thinner blade that protrudes from the edge of the part. Hammer to the surrounding side of the drill to form a shape that includes the arc and main cutter. that extends from one end of the cutting blade to the round tip of the drill when viewed from the tip of the drill bit. where the convex ridge of the contact part between the slits for ejecting the scrap material and the thinner surface, which is shaped by the cutting blade, is predominantly u-shaped, slanting in the direction along the axis of the drill bit and to to the direction that the convex ridge moves from the side which is a cutting blade that is thinner to the main blade side as it moves away from the tip of the Drill to the tip side when viewed from the front of the drill, which is the exposed side of the Such surgery where the scraping angle A1 caused by the cutter blade and the scraping angle A2 caused by such thinner cutting blades will satisfy the relationship A1>A2>0 except for the part which is below parts hammered into the position that is close to each other