CN209716534U - A kind of three cutting drills - Google Patents

Abstract

A kind of three cutting drills, shank and blade including coaxial arrangement, it is characterized by: offering three evenly spaced first helicla flutes around the blade, second helicla flute and third helicla flute, the top of the blade is apex point, first helicla flute, the apex point is divided into the identical flank of three shapes by the second helicla flute and third helicla flute, the inner end point of the flank is located at the unbearable place of the apex point, each flank includes first end face and second end face, main cutting edge is equipped in each first end face, each helicla flute is equipped with one group of corresponding rear ditch rib and root of the tail rib, the second end face is that the reconditioning face to be formed is processed in rear ditch rib and its corresponding root of the tail rib reconditioning simultaneously at apex point, and make the main cutting edge in broken line, including the first cutting edge and the second cutting edge, it improves The durability of drill bit improves chip removal chip breaking situation, makes to operate safer.

Description

A kind of three cutting drills

Technical field

The utility model belongs to technical field of tools, particularly relates to a kind of fluted drill, especially a kind of three swords It bores.

Background technique

The common fluted drill of tradition is born for over 100 years more than a hundred years from it, and planform variation is little, with the continuous hair of science and technology Exhibition, new material continue to bring out, and new requirement is constantly proposed to drill bit, and the common fluted drill of tradition is born for over 100 years more than a hundred years from it, structure Change in shape is little, and with the continuous development of science and technology, new material continues to bring out, and new requirement, In are constantly proposed to drill bit In the prior art, above the apex point of drill bit, two cutting faces and cutting edge are only set, when this results in drilling, revolved in high speed Under turning, drill bit can generate shaking, and due to only having two-edged cutting, stock-removing efficiency is low, and the cutting edge rate of wear is fast, Jin Erhui Lead to the reduction of machining accuracy.

Drill handle part is gripped afterwards and is rotated with it by fixture and processed, due to shank more gloss, in aperture The chucking power that often will appear fixture when processing is insufficient, makes to loosen skidding between drill bit and fixture, is easy to produce gap, so that boring There is the shaking of small area when in use in head, so that the drilling effect of drill bit is had a greatly reduced quality, it is impossible to ensure that drill bit is boring Precision when hole affects the use of drill bit, poor so as to cause the position degree after processing, influences the yield rate of product.

Therefore, the above problem is should to pay attention to during to fluted drill structure design and use and what is solved asks Topic.

Utility model content

In view of the above problems, the utility model provides one kind and overcomes defect in the prior art, provides a kind of knot Structure is reasonable, and intensity is high, three good cutting drills of cutting effect.

The technical solution of the utility model is: a kind of three cutting drills, shank and blade including coaxial arrangement, around institute It states blade and offers three evenly spaced first helicla flutes, the second helicla flute and third helicla flute, the top of the blade and be Apex point, knife after the apex point is divided into three shapes identical by first helicla flute, the second helicla flute and third helicla flute Face, the inner end point of the flank are located at the unbearable place of the apex point, and each flank includes first end face and second End face, is equipped with main cutting edge in each first end face, each helicla flute be equipped with one group it is corresponding after ditch rib and root of the tail Rib, the second end face are that rear ditch rib and its corresponding root of the tail rib reconditioning simultaneously at apex point are processed to be formed one and repaired Flour milling, and make the main cutting edge in broken line, including the first cutting edge and the second cutting edge.

Further improvement of the utility model is: according to the reconditioning angle of the second end face, in each helicla flute Front forms a reconditioning triangular facet between the first end face in the second end face and adjacent flank.

Further improvement of the utility model is: one side of the triangular facet and first cutting edge are overlapped, another Side and the junction of the second end face are overlapped, and bottom edge is the arc of opening upwards.

Further improvement of the utility model is: the blade includes three lands, and every land is in neighbouring drillstock Land end carries out reconditioning and forms a water conservancy diversion plane, and the water conservancy diversion plane is rectangle, and top margin is overlapped with root of the tail rib, bottom edge Step surface is formed between land.

Further improvement of the utility model is: the angle between first cutting edge and second cutting edge is 135°-150°。

Further improvement of the utility model is: the angle between the second end face and the transverse plane of the drill bit is 45°-60°。

Further improvement of the utility model is: between its first cutting edge of the apex point and adjacent first cutting edge Angle is the first sharp angle, and the angle between the second cutting edge and adjacent second cutting edge is the second sharp angle, the first sharp angle and second Sharp angle is consistent, is 115 ° -135 °.

Further improvement of the utility model is: the surface of the main cutting edge is provided with carbon nitride coatings.

Further improvement of the utility model is: the shank is circumferentially uniformly provided with multiple location holes, each location hole In same level.

The utility model provides a kind of three cutting drills, including three flanks and three main cutting edges, and each flank It is divided into first end face and second end face, then cooperates Zhou Ren, so that drill bit stable cutting in the process of running, improves feed speed, Product glossiness after cutting is high, and reconditioning face is arranged in no strain line before first end face, flows into cutting region convenient for cutting fluid, reduces The temperature of cutting edge alleviates the abrasion of cutting edge, and the bits after guaranteeing cutting can prevent timely by chip space discharge Bits block in chip space, and drill bit is caused to be easy fever or even drill rod breaking, improve the durable of drill bit Water conservancy diversion plane is arranged in the tail portion of land, so that chip removal is more smoothly, additionally it is possible to reduce rapidly blade and produce in process in degree Raw high temperature, makes to operate safer, substantially increases production efficiency.

The beneficial effects of the utility model are: its structure is simple, design is reasonable, if there are three main cutting edge, bit bore When effectively reduce shaking, feel relieved and be not easy to skid, be conducive to scrap discharge, increase drilling efficiency, improve chip removal chip breaking Puzzlement, reduces drilling drag, is more advantageous to chip removal and cutting fluid flows into helicla flute, reduce the temperature of cutting edge, mitigate The abrasion of cutting edge, improves production rate, and the drill bit of this kind of structure improves 30% than normal drill bit its trepanning velocity, also mentions The high durability of drill bit, life longer 50%, the punching application suitable for wood, plastics and metal.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the main view of apex point in the utility model；

Wherein: 1- shank, 2- blade, the first helicla flute of 3-, the second helicla flute of 4-, 5- third helicla flute, 6- apex point, 7- First end face, 8- second end face, the first cutting edge of 9-, the second cutting edge of 10-, 11- triangular facet, the bottom edge 12-, 13- land, 14- Water conservancy diversion plane, 15- transverse plane, 16- location hole.

Specific embodiment

In order to deepen the understanding to the utility model, the utility model is done further below in conjunction with drawings and examples Detailed description, the embodiment are only used for explaining the utility model, do not constitute and limit to the protection scope of the utility model.

As shown in the figure: the technical solution of the present embodiment is: a kind of three cutting drills, shank 1 and sword including coaxial arrangement Portion 2 offers three evenly spaced first helicla flutes 3, the second helicla flute 4 and third helicla flute 5, institute around the blade 2 The top for stating blade 2 is apex point 6, and first helicla flute 3, the second helicla flute 4 and third helicla flute 5 divide the apex point 6 At the identical flank of three shapes, the inner end point of the flank is located at the unbearable place of the apex point, each flank Include first end face 7 and second end face 8, is equipped with main cutting edge in each first end face 7, each helicla flute is equipped with One group of corresponding rear ditch rib and root of the tail rib, the second end face 8 are rear ditch rib and its corresponding root of the tail rib at apex point The reconditioning face to be formed is processed in reconditioning simultaneously, and the main cutting edge is cut in broken line, including the first cutting edge 9 and second Cut sword 10.According to the reconditioning angle of the second end face 8, before each helicla flute, the second end face 8 and adjacent rear knife A reconditioning triangular facet 11, one side of the triangular facet 11 and the first of the first end face 7 are formed between first end face 7 on face Cutting edge 9 is overlapped, and the junction of another side and the second end face 8 is overlapped, and bottom edge 12 is the arc of opening upwards.

The blade 2 includes three lands 13, and every land 13 carries out reconditioning in the land end of neighbouring drillstock 1 and forms one Water conservancy diversion plane 14, the water conservancy diversion plane 14 are rectangle, and top margin is overlapped with root of the tail rib, form platform between bottom edge and land 13 Terrace is simultaneously connected with the land end of drill bit.

Angle between first cutting edge 9 and second cutting edge 10 is 135 °.Its first cutting of the apex point 6 Angle between sword 9 and adjacent first cutting edge 9 is the first sharp angle, between the second cutting edge 10 and adjacent second cutting edge 10 Angle is the second sharp angle, and the first sharp angle and the second sharp angle are consistent, is 125 °.The surface of the main cutting edge is provided with carbonitride painting Layer.Angle between the second end face 8 and the transverse plane 15 of the drill bit is 60 °.The shank 1 is circumferentially uniformly provided with three Location hole 16, each location hole are located in same level.

The present embodiment provides a kind of three cutting drills, including three flanks and three main cutting edges, and each flank is divided At first end face 7 and second end face 8, then cooperate Zhou Ren, so that drill bit stable cutting in the process of running, improves feed speed, Product glossiness after cutting is high, no strain line, and the 7 setting reconditioning face 8 before first end face flows into cutting region, drop convenient for cutting fluid The low temperature of cutting edge alleviates the abrasion of cutting edge, and the bits after guaranteeing cutting can be timely discharged by chip space, anti- It only considers to be worth doing and blocks in chip space, and drill bit is caused to be easy fever or even drill rod breaking, improve the resistance to of drill bit Water conservancy diversion plane 14 is arranged in the tail portion of land, so that chip removal is more smoothly, additionally it is possible to reduce rapidly blade in process in expenditure The high temperature of middle generation, makes to operate safer, substantially increases production efficiency.

The beneficial effect of the present embodiment is: its structure is simple, design rationally, if there are three main cutting edge, when bit bore Shaking is effectively reduced, feels relieved and is not easy to skid, is conducive to scrap discharge, increases drilling efficiency, improves the tired of chip removal chip breaking It disturbs, reduces drilling drag, be more advantageous to chip removal and cutting fluid flows into helicla flute, reduce the temperature of cutting edge, alleviate The abrasion of cutting edge, improves production rate, and the drill bit of this kind of structure improves 30% than its trepanning velocity of normal drill bit, also improves The durability of drill bit, life longer 50%, punching application suitable for wood, plastics and metal.

It should be understood by those skilled in the art that the present utility model is not limited to the above embodiments, above-described embodiment and Only illustrate the principles of the present invention described in specification, on the premise of not departing from the spirit and scope of the utility model, The utility model also has various changes and improvements, these changes and improvements both fall within the scope of the claimed invention It is interior.The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (9)

1. a kind of three cutting drills, shank and blade including coaxial arrangement, it is characterised in that: offer three around the blade First helicla flute, the second helicla flute and the third helicla flute at even interval, the top of the blade are apex point, first spiral The apex point is divided into the identical flank of three shapes by slot, the second helicla flute and third helicla flute, the flank it is interior Endpoint is located at the unbearable place of the apex point, and each flank includes first end face and second end face, and each described first Main cutting edge is equipped on end face, each helicla flute is equipped with one group of corresponding rear ditch rib and root of the tail rib, the second end face are The reconditioning face to be formed is processed in ditch rib and its corresponding root of the tail rib reconditioning simultaneously at apex point afterwards, and makes the master Cutting edge is in broken line, including the first cutting edge and the second cutting edge.

2. a kind of three cutting drill according to claim 1, it is characterised in that: according to the reconditioning angle of the second end face, In Before each helicla flute, a reconditioning triangular facet is formed between the first end face in the second end face and adjacent flank.

3. a kind of three cutting drill according to claim 2, it is characterised in that: one side of the triangular facet and first cutting Sword is overlapped, and the junction of another side and the second end face is overlapped, and bottom edge is the arc of opening upwards.

4. a kind of three cutting drill according to claim 1, it is characterised in that: the blade includes three lands, every land Reconditioning is carried out in the land end of neighbouring drillstock and forms a water conservancy diversion plane, and the water conservancy diversion plane is rectangle, top margin and root of the tail Rib is overlapped.

5. a kind of three cutting drill according to claim 1, it is characterised in that: first cutting edge and second cutting edge Between angle be 135 ° -150 °.

6. three cutting drill of one kind according to claim 1, it is characterised in that: the transverse plane of the second end face and the drill bit Between angle be 45 ° -60 °.

7. three cutting drill of one kind according to claim 1, it is characterised in that: its first cutting edge of the apex point and adjacent the Angle between one cutting edge is the first sharp angle, and the angle between the second cutting edge and adjacent second cutting edge is the second sharp angle, First sharp angle and the second sharp angle are consistent, are 115 ° -135 °.

8. three cutting drill of one kind according to claim 1, it is characterised in that: the surface of the main cutting edge is provided with nitridation Carbon coating.

9. three cutting drill of one kind according to claim 1, it is characterised in that: the shank is circumferentially uniformly provided with multiple fixed Position hole, each location hole are located in same level.