CN2192422Y

CN2192422Y - Efficient durable super-hard-mater drill with special drilling angle

Info

Publication number: CN2192422Y
Application number: CN 94214077
Authority: CN
Inventors: 王亚平; 廖钟亮
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-13
Filing date: 1994-06-13
Publication date: 1995-03-22
Anticipated expiration: 2004-06-13

Abstract

The utility model relates to a drill bit with a superhard membranous layer which is coated on the surface. The top of the drill bit is provided with side blades 1 and 8, middle blades 2 and 7, crescent blades 3, inner blades 4 and 5 and a transverse blade 9, the inner blades 4 and 5 form a central drill tip 12, the crescent blades 3 and 6 and the middle blades 2 and 7 form a main drill tips 11 and 13, the side blades 1 and 8 and the middle blades 2 and 7 form sub drill tips 10 and 14, the outer edge portion of the drill bit is provided with a break angle, and the drill bit is also provided with a side-blade edge angle 2 phi side, a middle-blade edge angle 2 phi middle and an inner-blade edge angle 2 phi inner. The utility model has the advantages of high machining efficiency, stable angle, rapid chip cutting and breaking, fluent discharge, favorable heatproof quality and high machining precision.

Description

Efficient durable super-hard-mater drill with special drilling angle

The utility model relates to a kind of drill bit, and especially a kind of surface-coated has the drill bit of superhard rete.

At present, still use traditional fluted drill as boring bar tool in the mechanical processing industry in a large number, fluted drill or simply on fluted drill the drill bit work in-process coated with film expose many defectives, 1, the drill bit angle is unreasonable, the each point anterior angle changes greatly on the main sword, chisel edge is long, and smear metal, chip removal inconvenience, cutting fluid are difficult for flowing into working face and play lubricated, cooling effect; 2, fiber cropsization brill drill body material is that high-speed steel, hear resistance, wearability are still not high enough; 3, the durability that reveals at processing stainless steel, hardened steel, tool steel, bearing steel isochronous graph is very low, whets a knife, bit change is frequent, and operating efficiency is not high, and cutter material consumption is big, the cost height; 4, simply at the bit face coated film, increased the drill bit cost, the effect of receiving is undesirable, especially to difficult-to-machine material, does not almost have positive effect; When 5, needing a certain special angle, need hand grinding, no batch process scale.

The purpose of this utility model is to overcome the existing existing defective of drill bit, a kind of working (machining) efficiency height is provided, the cutter material loss is little, and production cost is low, the durability height, angle is stable, be fit to produce in batches, the smear metal chip breaking is fast, discharges smooth, good heat resistance, the special brill of the highly efficient durable that machining accuracy is high angle superhard film drill bit.

Task of the present utility model realizes in the following manner: superhard film drill bit top, the special brill of this highly efficient durable angle is provided with two crescent moon swords, article two, inner edge, article two, middle sword and a chisel edge, by forming the center apex point between two inner edges, by forming two main apex points between crescent moon sword and the middle sword, two inner edges accompany the inner edge sharp angle, knife edge angle during sword accompanies in two, it is characterized in that: the outside of sword is respectively equipped with the limit sword in two, become apex point two times with middle tooth shape by the limit sword, be symmetrically arranged with the knuckle of two δ=20 ° in drill bit outer rim section, corresponding δ knuckle accompanies 2 by the limit sword

The knife edge angle, limit of limit=125 °, inner edge sharp angle 2

In=145 °, middle knife edge angle 2

In=135 °, bit face is coated with the superhard film of 1.5～3.5 μ m.

In the utility model, superhard film can adopt ZrN, TiN, HfN, Al ₂O ₃, TiC etc.

The utility model is compared with existing drill bit, has the following advantages: 1, by the knuckle of δ=20 ° is set in drill bit outer rim section, the end face cutting edge inclination of this section of drill bit is strengthened, anterior angle is reduced, and the cutting load trend has evenly strengthened the rigidity of drill bit, chip-breaking performance is good, and cutting edge is sharp; 2, because bit face has applied the superhard rete of one deck, film hardness reaches HV ₁₀1900～2300, the bit face greasy property is good, and coefficient of friction is little, and smear metal very easily skids off, and adds the heat-resisting high temperature resistance of superhard film, and cutter is difficult for forming built-up edge; 3, owing to the utlity model has special brill angle, make cutting fluid enter the workspace easily, most of heat in metal cutting is got rid of with smear metal, and cutting edge lubricates, and has improved the heat resistance and the service life of drill bit; 4, good combination property has been saved man-hour of bit change, abrasive drilling head, and production efficiency improves more than 20%; 5, the roughness on machined material surface can improve a magnitude.

Concrete structure of the present utility model is provided by drawings and Examples.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the vertical view of Fig. 1.

Below in conjunction with drawings and Examples the utility model is described in more detail.

Embodiment:

With reference to Fig. 1, Fig. 2, the special brill of this highly efficient durable angle superhard film drill bit from center apex point 12 to both sides be processed with successively inner edge 4.5, crescent moon sword 3.6, sword 2.7, limit sword 1.8 and length equal the chisel edge 9 of 0.1 times of bit diameter, form time apex point 10 by limit sword 1 and middle sword 2, form time apex point 14 by limit sword 8 and middle sword 7, be symmetrily processed with the knuckle of two δ=20 ° in drill bit outer rim section, corresponding δ knuckle is formed 125 ° knife edge angle, limit 2 by both sides sword 1,8

_{The limit}, the inner edge sharp angle 2 that forms by two

inner edges

4,5

_In=145 °, the middle knife edge angle 2 that forms by sword 2.7 in two

_In=135 °, bit face is coated with the thick ZrN rete of 2 μ m.

Claims

1, the special brill of a kind of highly efficient durable angle superhard film drill bit, the drill bit top is provided with crescent moon sword (3), (6), inner edge (4), (5), middle sword (2), (7), chisel edge (9), by forming center apex point (12) between two inner edges (4), (5), by forming main apex point (11), (13) between crescent moon sword (3), (6) and middle sword (2), (7), two inner edges (4), (5) accompany inner edge sharp angle 2

_In, accompany middle knife edge angle 2 by sword (2), (7) in two _InIt is characterized in that: be respectively equipped with limit sword (1), (8) in the outside of middle sword (2), (7), form time apex point (10) by limit sword (1) and middle sword (2), form time apex point (14) by limit sword (8) and middle sword (7), be symmetrically arranged with the knuckle of two δ=20 ° in drill bit outer rim section, corresponding δ knuckle accompanies 2 by limit sword (1) and (8) _{The limit}=125 ° knife edge angle, limit, inner edge sharp angle 2

_In=145 °, middle knife edge angle 2

_In=135 °, bit face is coated with the superhard film of 1.5～3.5 μ m.