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Drill bit and method for manufacturing

A drill and grinding technique used in the manufacture of tools, twist drills, drill accessories, etc. to improve cooling and lubrication properties, and to avoid disconnection or excessive wear

Active Publication Date: 2016-02-17
KENNAMETAL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] While such conventional methods of manufacturing drill bits have generally been adequate, there is still room for improvement in such methods, especially in terms of simplifying them

Method used

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  • Drill bit and method for manufacturing
  • Drill bit and method for manufacturing

Examples

Experimental program
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Embodiment Construction

[0021] Referring to the accompanying drawings, a drill bit 1 (extending in the direction of its central longitudinal axis 2 when viewed from the drill bit face 4 on its axial direction 3) is made up of three sub-regions, namely: the tip region 5, the tip region 5 and the tip region 5. The adjacent central area 6, and thus the clamping handle 7 adjacent to the central area 6. The drill bit is produced from a round rod. For the purpose of manufacturing this drill, the round bar is clamped by its one end between jaws 8 of the tool holder, which constitute the subsequent clamping shank 7 . The round rod clamped in the collet by means of the jaws 8 can then be rotated about the central longitudinal axis 2 in the direction of rotation 9 in any way.

[0022] Two cooling channels 10 extend through the drill head 1 . The cooling channels 10 extend axially 3 through the drill 1 and open into the cooling openings 11 in the region of the drill front 4 . The chip flutes 12 are ground in...

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PUM

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Abstract

A method for manufacturing a drill bit (1), wherein in a first step the chip flutes (12) are ground into a round rod, in a second step the round rod is ground down to its outer diameter (15, 16) with simultaneous grinding of the drill-bit back (13), and wherein in a third step the drill-bit front (4) is ground, and a drill bit (1) having at least one chip flute (12) and one secondary cutting edge and one drill-bit back (13) adjoining the secondary cutting edge, the drill-bit back (13) sloping downwards as the distance from the secondary cutting edge increases, in order to create a clearance that becomes continuously larger as the distance from the point of intersection (19) of the secondary cutting edge with the drill-bit back (13) increases.

Description

[0001] This divisional application is a divisional application based on the Chinese invention patent application number 201180008199.7 (international application number PCT / US2011 / 022681), the title of the invention "drill bit and its manufacturing method", and the application date of January 27, 2011. [0002] background technical field [0003] The invention relates to a method for producing a drill bit and to a drill bit which is preferably produced by the method according to the invention. Background technique [0004] In the conventional method for producing drills, in particular twist drills, first a round rod is clamped at one end. This clamping action usually takes place in a collet. The clamped area of ​​the round rod forms the subsequent drill holding shank. In a first method step, the round rod is ground to the desired size, ie to the specified outer diameter of the drill. In a further operation, chip flutes are ground into the solid material which already has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B51/02B24B19/02B23P15/32B24B1/00B24B3/24
CPCB23B51/02B23P15/32B24B1/00B24B3/24B24B19/022B23B2251/244B23B51/0411Y10T408/9095
Inventor J·施韦格尔P·佐尔弗兰克
Owner KENNAMETAL INC