Drill and insert for drill having improved centering capability and cutting performance

A technology for inserts and drill bits, used in drilling tool accessories, drilling/drilling equipment, components of boring machines/drilling machines, etc., to achieve the effects of minimized vibration, uniform performance, and excellent centering ability

Inactive Publication Date: 2021-07-23
韩国养志园有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The object of the present invention is to provide a drill or an insert for a drill that achieves a plane relief at the center, makes the point angle constant, thereby improving the centering capability, and treats the relief surface at the outer periphery as a curved surface. , to solve the problem caused by the sharp change of the point angle, so as to minimize the vibration of the drill bit and the occurrence of burrs (Bur)

Method used

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  • Drill and insert for drill having improved centering capability and cutting performance
  • Drill and insert for drill having improved centering capability and cutting performance
  • Drill and insert for drill having improved centering capability and cutting performance

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Embodiment Construction

[0032] Hereinafter, the present invention will be described in more detail with reference to the drawings.

[0033] The present invention is not only applicable to common solid type (Solid type) drill bits, but also applicable to indexable type (Indexable type) drill bits. Inserts for indexable drills, such as spade drill inserts, also have various forms depending on the fastening method, and any of them can be applied. image 3 (a) shows an example of a common solid type (Solidtype) drill bit or a welding type drill bit, image 3 (b) shows an example of an indexable type drill, and image 3 (c) and (d) show examples of spade drills.

[0034] refer to image 3, The drill bit of the present invention includes a head 310 formed at the front end along the rotation axis X and a main body (Shank) 330 provided at the rear end of the head 310 . The invention is implemented in the head 310 and thus can be implemented in the drill bit itself or in inserts such as insert 350 or spad...

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Abstract

Disclosed are a drill and an insert for a drill having improved centering capability and cutting performance. A drill of the present invention processes a relief surface in the center of a cutting edge portion into a flat surface and processes a relief surface on the outer circumferential portion which is connected from the center to the outer circumferential surface into a curved surface, thereby enhancing centering capability and minimizing generation of drill vibration and burr. In addition, the drill of the present invention identically processes the tangential angle of a relief surface, which comes into contact with a hole, regardless of the outer diameter size of the drill, thereby achieving uniform performance even if the outer diameter of the drill varies.

Description

technical field [0001] The present invention relates to a drill or an insert for a drill that achieves a plane relief at the center, makes the point angle constant, thereby improving the centering ability, and treats the relief surface at the outer periphery as a curved surface , Solve the problems caused by sharp changes in point angles, thereby minimizing the occurrence of drill vibration and burrs. Background technique [0002] As a rotary tool such as an end mill (End Mill), a drill is processed along a central axis as a rotation axis with a cutting tooth (Cutting Tooth) at the front and a rear end extending from the cutting tooth A tool formed with a shank. [0003] Drills are divided into solid type drills which are integrated and indexable type drills which are used by inserting inserts at the drilling point. The solid drill is a drill that cannot be used if the cutting edge portion at the front end is completely worn out, and the entire drill needs to be replaced. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/02
CPCB23B2251/50B23B51/02B23B2251/04B23B2251/082B23B2251/14B23B2251/18B23B51/00035B23B2251/08
Inventor 朴英君李庭旭
Owner 韩国养志园有限公司
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