摘要:
The present invention relates to an end mill, which comprises a bottom edge, which is composed of an arc-shaped cutting edge that is curved when seen from a direction perpendicular to the tool axis and a linear or curved medium-to-low inclination cutting edge, and a peripheral edge, wherein, when seen from a direction parallel to the tool axis, the arc-shaped cutting edge and a rim at the rearward side of the rotation at a flank of the arc-shaped cutting edge are curved with radii of curvatures, and the radius of curvature of the arc-shaped cutting edge is smaller than the radius of curvature of the rim at the rearward side of the rotation at the flank of the arc-shaped cutting edge.
摘要:
The present invention relates to an end mill, which comprises a bottom edge, which is composed of an arc-shaped cutting edge that is curved when seen from a direction perpendicular to the tool axis and a linear or curved medium-to-low inclination cutting edge, and a peripheral edge, wherein, when seen from a direction parallel to the tool axis, the arc-shaped cutting edge and a rim at the rearward side of the rotation at a flank of the arc-shaped cutting edge are curved with radii of curvatures, and the radius of curvature of the arc-shaped cutting edge is smaller than the radius of curvature of the rim at the rearward side of the rotation at the flank of the arc-shaped cutting edge.
摘要:
Provided is a long life carbide end mill which can perform stable cutting in high-efficiency machining such as die machining and parts machining. A cutting method using such an end mill is also provided. When a certain wavy or nicked peripheral cutting edge is considered a reference peripheral cutting edge with reference phases in a pitch of the reference peripheral cutting edge, wherein the distance of each reference phase is an amount corresponding to a value obtained by dividing the pitch of the nicks or waveform of each peripheral cutting edge by the number of the cutting edges; and the phase of at least one of the remaining peripheral cutting edges is deviated in the direction of the tool axis from the corresponding reference phase by an amount corresponding to 5% or less (excluding 0%) of the pitch.
摘要:
Provided is a long life carbide end mill which can perform stable cutting in high-efficiency machining such as die machining and parts machining. A cutting method using such an end mill is also provided. When a certain wavy or nicked peripheral cutting edge is considered a reference peripheral cutting edge with reference phases in a pitch of the reference peripheral cutting edge, wherein the distance of each reference phase is an amount corresponding to a value obtained by dividing the pitch of the nicks or waveform of each peripheral cutting edge by the number of the cutting edges; and the phase of at least one of the remaining peripheral cutting edges is deviated in the direction of the tool axis from the corresponding reference phase by an amount corresponding to 5% or less (excluding 0%) of the pitch.
摘要:
In a radius end mill having a bottom edge formed on the end face thereof, a radius edge designed in a substantially quarter arc shape and formed at a corner portion thereof, and an outer peripheral edge formed spirally on the side surface thereof, the bottom edge and the radius edge being continuously connected to each other at a connecting point A while the radius edge is continuously connected to each other at a connecting point B, when a view taken along a plane that passes through the connecting points A and B and crosses a rake face of the radius edge is represented by an R cross-sectional view, the rake face of the radius edge is designed to have a convex curved line extending from the connecting point A to the connecting point B in the R cross-sectional view.
摘要:
A fixed base is formed at its upper surface with a recess portion, and a bottom surface of said recess portion is normally formed into a plane. A movable plate is disposed in the recess portion of said fixed base with a moving region left therein. Spacers are projectingly embedded in the lower surface of said movable plate, and a gap is formed between the bottom surface of the recess portion of the fixed base and the lower surface of the movable plate, said gap being filled with a viscous material. A pipe is disposed on the movable plate through a support base. The vibration of the pipe is transmitted to the movable plate to produce a relative motion between two surfaces, one being the lower surface of the movable plate and the other being the bottom surface of the recess portion of the fixed base. The viscous shearing resistance of the viscous material resulting from said motion displays an excellent vibration-absorbing action.
摘要:
A thermal printer paper feeding mechanism having a reciprocable print head carrier. A paper feeding roller has a ratchet cross section with the ratchet teeth twisted along the length of the paper feed roller. The paper feed roller rotates for advancing paper to be printed on while the print head carrier returns to a start position after having printed a line.