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.

Active Publication Date: 2017-03-29
BOSCH POWER TOOLS CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the efficiency of chip removal and the strength of blade support in the existing drill bit are difficult to balance

Method used

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  • Drilling tools and drill bits
  • Drilling tools and drill bits
  • Drilling tools and drill bits

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The present invention relates to improvements to the distal (tip) portion of drill bits. The present invention is particularly applicable to drills with carbide inserts at the distal end, such as percussion drills, masonry drills, glass drills, multifunctional drills, and the like. The following description is mainly directed to drills with carbide inserts, however, it should be pointed out that the basic principles of the invention can also be applied to drills without carbide inserts. Therefore, the present invention is applicable to various drill bits and corresponding drilling tools (such as electric drilling tools, especially portable electric drilling tools).

[0029] In the present application, the so-called "distal side" refers to the direction toward the drill part to be drilled into the processing object, and "near side" refers to the direction toward the drill part to be clamped in the electric drilling tool body.

[0030] As is well known in the art, a dril...

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PUM

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28D1/14
Inventor 裘晓
Owner BOSCH POWER TOOLS CHINA
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