CN207026553U

CN207026553U - A kind of Double Tops wedge angle chip dividing drill

Info

Publication number: CN207026553U
Application number: CN201720901177.8U
Authority: CN
Inventors: 焦余华
Original assignee: JIANGSU FEIDA DRILLS CO Ltd
Current assignee: JIANGSU FEIDA DRILLS CO Ltd
Priority date: 2017-07-24
Filing date: 2017-07-24
Publication date: 2018-02-23
Anticipated expiration: 2027-07-24

Abstract

The utility model provides a kind of Double Tops wedge angle chip dividing drill, including drill bit part, the apex point includes two top angle a and b, the apex point includes two cutting edges, the cutting edge is divided to bits cutting edge and two front cutting edges including two main cutting edges, two, and with dividing bits cutting edge to be connected, the other end is connected with main cutting edge for one end of front cutting edge, by the main cutting edge of drill bit and divide bits cutting edge to be divided into two sections of independent cutting edges, a point bits are formed when reaching drilling；The utility model efficiently solves main sword length existing for common fluted drill, and chip is wide, and the speed of each point chip outflow is differed greatly, and chip curling is rolled up into wide spiral shell, and shared spatial volume is big, causes the problem of chip removal is not smooth, and cutting fluid difficultly flows into.

Description

A kind of Double Tops wedge angle chip dividing drill

Technical field

It the utility model is related to drilling tool structure design manufacturing technology field, and in particular to a kind of Double Tops wedge angle point bits Bore.

Background technology

Fluted drill drilling processing is semi-enclosed cutting, and chip can not freely discharge as turning etc..Usual chip is easy Squeeze in hole when can not arranging Chu Lai, cuttings liquid is also just not easy to flow into, and promotes drilling temperature to increase, and drill thrust increase, aggravates bit grinding Damage causes broken drill or burnt to death when serious, while the hole precision processed is low, roughness is big, so as to directly influence drilling Effect.These problems when big feed high-efficient cutting is processed it is especially prominent multiple chip dividing grooves are outputed on drill bit can be in very great Cheng This cutting state is improved on degree, and therefore ingenious point of bits chip removal problem turns into how crucial uses a point bits principle to improve drill bit, Most typical example is exactly Ni Zhifu drill, and it ingeniously grinds crater arcuate blade, the segmentation cutting of more blade tips, and each section of knife edge profit is balanced, prominent strong A point smooth chip removal for bits cutting is changed.

The content of the invention

In order to solve problems of the prior art, the utility model provides a kind of Double Tops wedge angle chip dividing drill.

The technical scheme that the utility model solves the above problems is：A kind of Double Tops wedge angle chip dividing drill, including drill bit part, institute Stating apex point includes two top angle a and b, and the apex point includes two cutting edges, and the cutting edge includes two main cutting edges, two Individual point of bits cutting edge and two front cutting edges, one end of front cutting edge is with dividing bits cutting edge to be connected, the other end and main cutting edge It is connected, by the main cutting edge of drill bit and divides bits cutting edge to be divided into two sections of independent cutting edges, a point bits is formed when reaching drilling；

Angle between two main cutting edges is a, and a is 115 ° -125 °；Angle between two points of bits cutting edges is b, b For 130 ° -140 °.The apex point of Double Tops point is also included around the rake face for being provided with two helicla flutes formation, after rear knife face includes main cut Knife face after knife face, secondary cutting after knife face, point bits cutting, it is main cut be provided with secondary cutting between knife face after rear knife face and point bits cutting after Knife face, it is in inverted cone shape that knife face is gradually reduced diameter to shank direction after the secondary cutting；Knife face is along the circumferential direction set after pair cutting There is relief grinding amount k；

The distance of two points of bits cutting edge tail ends is D, and the distance on two front cutting edge tops is d1, and d1 is (0.3-0.8) * The distance between D, two secondary bite tail ends are d2, wherein d1>d2；Double Tops wedge angle and the diameter self-assembling formation of two secondary cuttings The height of front cutting edge is h1, about 0.1-1.0mm；

The front cutting edge top is main cutting edge and front cutting edge junction；

The front cutting edge tail end is to divide bits cutting edge and front cutting edge junction；

The apex point is equal to across back, the depth of the helicla flute around provided with the helicla flute of two, the width of the helicla flute Spend for (0.35-0.45) * D, the spiral angle of helicla flute is d, and d size is 20 ° -25 °, and the auxiliary angle of helicla flute is e, e's Size is 2 ° -3 °.

The utility model has beneficial effect：

The utility model can increase the amount of feeding by web thinning and after dividing bits cutting edge, and efficiency can improve 2-3 times, Chip removal is good.This kind of chip dividing drill head, preferably effect is played in drilling, narrow and wide strip chip is formed, is advantageous to chip removal, And the cutting moment of torque can be reduced.This kind of chip dividing drill head, it is reasonable in design, ensure the more preferable row of drill bit by setting chip dividing groove Bits, can effectively solve the problem that main sword is normal existing for common fluted drill, and chip is wide, and the speed of each point chip outflow differs greatly, chip Wide spiral shell volume is curled into, shared spatial volume is big, causes the problem of chip removal is not smooth, and cutting fluid difficultly flows into.

Brief description of the drawings

Fig. 1 is the utility model front view；

Fig. 2 is the utility model left view；

In figure：1- main cutting edges, 3- front cutting edges, 4- divide bits cutting edge, 5- helicla flutes, 6- rake faces, the main sections of 8-, 9- Divide bits face, 10- pairs section.

Embodiment

Below in conjunction with the accompanying drawings and embodiment is further described to the utility model.

As illustrated, a kind of Double Tops wedge angle chip dividing drill, including drill bit part, the apex point include two top angle a and b, The apex point includes two cutting edges, and the cutting edge is divided to bits cutting edge and two pairs to cut including two main cutting edges, two Sword is cut, with dividing bits cutting edge to be connected, the other end is connected with main cutting edge for one end of front cutting edge, by the main cutting edge of drill bit and divides Bits cutting edge is divided into two sections of independent cutting edges, and a point bits are formed when reaching drilling；

The apex point is equal to across back around provided with the helicla flute of two, the width of helicla flute, and the depth of the helicla flute is (0.35-0.45) * D, the spiral angle of helicla flute are d, and d size is 20 ° -25 °, and the auxiliary angle of helicla flute is e, e size For 2 ° -3 °.

Claims

A kind of 1. Double Tops wedge angle chip dividing drill, it is characterised in that including drill bit part, the apex point includes two top angle a and b, The apex point includes two cutting edges, and the cutting edge is divided to bits cutting edge and two pairs to cut including two main cutting edges, two Sword is cut, with dividing bits cutting edge to be connected, the other end is connected with main cutting edge for one end of front cutting edge, by the main cutting edge of drill bit and divides Bits cutting edge is divided into two sections of independent cutting edges, and a point bits are formed when reaching drilling.
2. a kind of Double Tops wedge angle chip dividing drill as claimed in claim 1, it is characterised in that the angle between two main cutting edges is A, a are 115 ° -125 °；Angle between two points of bits cutting edges is b, and b is 130 ° -140 °；The apex point of Double Tops point also includes ring It is arranged with the rake face of two helicla flutes formation, knife after knife face, pair are cut after rear knife face cuts rear knife face including master, a point bits are cut Face, main cut are provided with knife face after secondary cutting after rear knife face and point bits cutting between knife face, and knife face is to shank side after the secondary cutting It is in inverted cone shape to diameter is gradually reduced.
A kind of 3. Double Tops wedge angle chip dividing drill as claimed in claim 1, it is characterised in that the distance of two points of bits cutting edge tail ends For D, the distance on two front cutting edge tops is d1, and d1 is（0.3-0.8）* the distance between D, two secondary bite tail ends are D2, wherein d1>d2；The height of Double Tops wedge angle and the diameter self-assembling formation front cutting edge of two secondary cuttings is h1, about 0.1- 1.0mm。
4. a kind of Double Tops wedge angle chip dividing drill as claimed in claim 3, it is characterised in that the front cutting edge top is main cutting Sword and front cutting edge junction.
5. a kind of Double Tops wedge angle chip dividing drill as claimed in claim 3, it is characterised in that the front cutting edge tail end is to divide bits to cut Cut sword and front cutting edge junction.