摘要:
A rotary chip-removing tool includes a rotary tool body and a tool tip fastened on a front end thereof. The tool tip is formed of an injection molded body which has an integral cutting edge at its front end, and a coupling structure at its rear end. The coupling structure can be in the form of a threaded hole, or a rearward projection, for coupling the tool tip against the tool body. The tool tip is formed of first and second materials. The first material forms at least part of the cutting edge, and the second material forms the coupling structure. The first material is more brittle than the second material, and the second material is tougher than the first material.
摘要:
A tool for chip-forming machining is made by passing first and second compounds through first and second coaxial dies, respectively, whereby the first material forms a center core of the tool, and the second material forms an outer rod of the material. The material of the core is tougher and less wear-resistant than the material of the outer rod. The coaxial first and second compounds are passed through a shaping die and then through a flute-forming structure which forms chip flutes in the outer rod.
摘要:
A tool such as a drill or end mill has a central portion formed of a relatively tough hard material connected to an outer peripheral portion formed of relatively wear resistant hard material, i.e., the outer peripheral portion is more brittle and wear resistant than the central portion. The chip flutes of the tool are disposed only in the outer peripheral portion and thus are formed entirely of relatively wear resistant hard material.
摘要:
A mold is provided for making a cutting tool insert from a material to be molded, the cutting tool insert having an edge defined by two intersecting surfaces. The mold includes a first surface, a second surface intersecting with the first surface to define an edge, and an air gap between the first surface and the second surface at the edge, the width of the air gap varying in a controlled way along its length. A method for making a cutting tool insert is also disclosed.
摘要:
The present invention relates to a tool as well as a blank for manufacturing of the tool. The tool is made of solid cemented carbide and includes a shank for mounting in a rotatable spindle and chip flutes. Lines of intersection between the chip flutes and clearance surfaces form cutting edges at a cutting end of the tool. The flush channels extend through the entire tool in order to transfer flushing medium to the cutting end of the tool. The flush channels have varying pitch.
摘要:
A rotary tool such as a helix drill and an end mill for example, is manufactured by forming a blank by an extrusion process, and then sintering the blank. During the extrusion, a mixture is passed through a die which provides a cylindrical shape to the outer peripheral surface of the mixture. A plurality of jaws are disposed downstream of the die for conducting the mixture. Each jaw includes a helical ridge for engaging the outer surface of the extrudate to cause a helical groove to be formed therein which constitutes a chip flute in the tool. During the extrusion, the jaws are moved away from the mixture to terminate formation of the chip groove, whereby a shank portion of the tool is formed.
摘要:
A cutting member is manufactured by forming a mixture of cemented carbide and a bearer, and heating the mixture. Then, the heated mixture is injected into a mold for forming a body having a cutting edge in a front surface thereof, a flushing channel extending therethrough, and a rearwardly open blind hold formed centrally in a rear surface thereof. The body is then removed from the mold.
摘要:
A tool for cutting machining comprises a tool body, a cutting member and a fastener for fastening the cutting member to the tool body. The tool body has a shank, a central bore formed therethrough, and a front surface having grooves formed therein. The cutting member includes a cemented carbide body having a cutting edge formed in a front surface thereof, and a rear supporting surface. The supporting surface includes ridges received in the grooves, and a rearwardly open blind hole. The fastener extends through the central bore and is threadedly connected to the blind threadedly connected to the blind bore for pulling the cutting member against the tool body.