Chip suction drill

Abstract

A chip suction drill (10) performs a hole making process to a material to be ground (42) such as a casting using a cutting blade (24). A chip generated is suctioned in a chip suction path (18) from a chip intaking hole (30) formed in a cutting blade groove (22) and ejected to a shank (16) side. In this case, since an air introduction groove (32) is provided in the outer periphery surface of a blade (12), air is excellently introduced into the leading end of a tool at which the chip is generated by the cutting blade (24) and the air introduced into the leading end of the tool upon the suction of air by the chip suction path (18) is excellently suctioned in the chip intaking hole (30) together with the chip. Particularly, since only one chip suction path (18) is provided in the tool, its cross section area can be sufficiently secured and the chip intaking hole (30) can be enlarged along with the enlargement of the chip suction path (18). Thus, the generation of chip packing can be suppressed and excellent chip suction performance can be obtained.

Description

technical field [0001] The present invention relates to a drill bit, and more particularly, to a chip suction integral drill bit which forcibly sucks and discharges chips for the purpose of preventing environmental pollution and simplifying cleaning work. Background technique [0002] Conventionally, there has been proposed a chip-attracting integral drill that has: (a) an end in which a groove for a cutting edge is formed on the outer peripheral surface and the groove for a cutting edge is open on the tool tip side; A cutting edge for drilling is provided on the edge, and (b) a chip suction passage for a cutting introduction hole that is provided along the axis inside the tool and simultaneously formed on the groove for the cutting edge; and, (c) While rotating and driving the tool around the axis, it advances toward the front end of the tool, drilling is performed with the cutting edge, and chips generated during the drilling are sucked from the chip introduction hole into...

AI Technical Summary

Problems solved by technology

In addition, since the helical groove is continuously provided in the axial direction on the cutting edge groove for forming the cutting edge, air is introduced from the tip side of the tool under the helical groove, and there is a chip suction passage that only sucks in air. The problem that chips cannot be sucked in smoothly

Furthermore, since the air is introduced into the air introduction passage only by the negative pressure of the chip suction passage, it is difficult to generate a sufficient air flow. From this point of view, there is also a possibility that a sufficient chip suction effect cannot be obtained. possibility

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