摘要:
A method for lubricating a material-working tool comprises depositing a material film by high energy level vacuum plating onto the tool for providing a thin mechanically insulating film having a low shear stress value. The material film has a hardness which is less than the hardness of the tool which it overlies.
摘要:
Micromèche torsadée (11) possédant une paire de cannelures opposées (13) qui s'étendent de manière hélicoïdale depuis la pointe de la mèche (22) le long du corps (15). Les cannelures (13) définissent une paire d'ailes (17) opposées, chaque aile possédant une surface d'attaque (45) (par rapport au sens de rotation de la mèche) dont le tranchant est dégagé de manière à obtenir un bord de coupe périphérique à inclinaison positive qui forme un angle (A) compris entre 5o environ et 30o environ avec un rayon du corps de la mèche (11) qui s'étend vers le bord de coupe. La mèche (11) possède une station transversale dans laquelle la surface d'attaque (45) de chaque aile est pourvue d'un canal courbe (51) qui suit une ligne entre les bords de coupe (47) des deux ailes (17). La surface de fuite (53) de chaque aile (17) définit une courbe qui se retire sans solution de continuité depuis le chemin du bord de coupe (47) jusqu'au point où elle rencontre la surface d'attaque (45) de l'autre aile (17).
摘要:
A small-diameter drill for deep hole drilling is provided which is capable of inhibiting the cutting chips from getting bitten and producing a straightness for a drilled hole, thus suitable for drilling a hole having a depth (L) which is 15 or more times the diameter (D) of a drilled hole. The small-diameter drill 1 has a diameter 2 which is 1 mm or less and a drill section 5 including cutting edge(s) 3 and flute(s) 4. The length 11 of the flute 4 is at least 5 times and at most 10 times the drill diameter 2. The diameter of the drill section 5, after being reduced in diameter from the cutting edge 3 toward the rear of the drill section 5, is expanded in diameter so that the outer diameter at the end of the flute 4 becomes at least 0.9 times and at most 0.98 times the drill diameter 2. An expanded-diameter portion 10 is provided between the drill section 5 and a neck section 6 connected to a shank 7 and is expended in diameter from the outer diameter at the end 9 of the flute 4 up to 1 or less times the drill diameter 2. The diameter of the neck section 6 is smaller than the drill diameter 2, and the length 12 of the neck section 6 is 10 or more times the drill diameter 2.
摘要:
The present invention provides a method of surface decarburizing a cemented carbide cutting tool. The tool is placed in a protective environnement. The tool is heated to an elevated temperature of between 600-1100 degrees C while in the protective environment for a period of 15-120 minutes. In another aspect of the invention, a drill is provided having a drill body which has a cutting tip, an axis of symmetry, and a plurality of flutes (15), wherein the flutes have a rake surface at the cutting tip. The cutting tip comprises a plurality of side blades (42) between the flutes and joined at a web. A plurality of flank surfaces (47) extend from an outer diameter of the cutting tip to the axis of symmetry and a plurality of primary cutting edges (40) are present at the intersection of the flank surfaces with the rake surfaces. The primary cutting edges include either an angular (41) or radius surface or a combination thereof extending from the flank surfaces to the rake surfaces.
摘要:
The flute terminus or carry out of a microdrill is located spaced from cross-sectional changes of the drill and away from such areas of stress concentration and permits a slight flexing of the drill to compensate for standard production environment inefficiencies such as spindle runout, nonper- pendicularity of drill to workpiece and workpiece material which is not homogeneous.
摘要:
The flute terminus or carry out of a microdrill is located spaced from cross-sectional changes of the drill and away from such areas of stress concentration and permits a slight flexing of the drill to compensate for standard production environment inefficiencies such as spindle runout, nonper- pendicularity of drill to workpiece and workpiece material which is not homogeneous.