Drilling tools and drill bits

A technology for drilling tools and drill bits, which is applied in the field of drilling tools and drill bits, can solve the problems of chip removal efficiency, the difficulty of supporting the strength of the blade, and achieve the effects of being conducive to discharge, strong anti-deformation ability, and prolonging service life.
CN103358404BActive Publication Date: 2017-03-29BOSCH POWER TOOLS CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
BOSCH POWER TOOLS CHINA
Publication Date
2017-03-29

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Abstract

The invention discloses a drilling bit comprising a tool body which is cylindrical and a blade arranged at the far end of the tool body. The tool body is provided with a chip discharge structure; a slot forming a head portion of the chip discharge structure is arranged in the tool body on the back side of a cutting portion of the blade relative to a rotation direction of the drilling bit; the far end of the slot runs through a far-end face of the tool body while the near end of the slot is communicated with the far end of the tool body which is provided with the chip discharge structure; a ribbed portion for providing back supporting to the cutting portion of the blade is defined between the slot and the outer peripheral surface of the tool body. The invention further discloses a drilling tool comprising the drilling bit. The drilling tool and the drilling bit thereof have the advantages that chip discharge capacity of the drilling bit and the blade supporting strength are improved.
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Description

technical field

[0001] The invention relates to a drill bit for a drilling tool and a drilling tool comprising such a drill bit. Background technique

[0002] Usually, a machining object is drilled with a drilling tool. For processing objects with hard materials, such as stone, concrete, brick, high-strength composite materials, etc., percussion drills (such as masonry drills) are usually used to drill holes. The percussion drills used for percussion drills usually have Carbide inserts. Carbide blades are able to penetrate all kinds of hard materials due to their high hardness.

[0003] In existing impact drill designs, a large block of body material is usually left behind the carbide inserts relative to the direction of drill rotation in order to strongly support the carbide inserts. In this design, not enough room is left for the chips to evacuate efficiently. This results in harsher working conditions for the drill, such as higher noise and heat generation, which redu...

Claims

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