CN209239132U - New drill for deep hole machining - Google Patents

Abstract

The utility model relates to the new drills for deep hole machining, including clamping head, the clamping head bottom is fixed with drillstock, the drillstock bottom is fixed with drill bit, the drill bit bottom is fixed with blade, long service life, it is not easily broken, blade apex angle is modified as 145 degree, sword length is set as 5MM, the bigger cross cutting blade surface product of the drill bit blade apex angle of equivalent diameter is smaller, chisel edge is smaller, contact area is smaller when cutting, the stress of blade is smaller when cutting, the service life of drill bit can be extended while not reducing processing efficiency, the contact area in drillstock and hole is caused to increase in deep hole machining the reason of hole depth, the diameter of section of drill bit is greater than the diameter of section 0.2MM of drillstock, frangibility is not allowed in processing, by being RA0.8-RA0 the first helical flute and the second helical flute surface roughness .4MM, it can reduce the frictional force between scrap and the first helical flute, the second helical flute, can reduce the stress size of drill body.

Description

New drill for deep hole machining

Technical field

The utility model relates to the new drills for deep hole machining, belong to technical field of machining tools.

Background technique

Hole in machining usually the ratio between hole depth and aperture greater than 6 calls deep hole.Depth drill be it is a dedicated for The drill bit of deep hole processing, can be divided into two class of external chip discharging and interior chip removal, and external chip discharging has drill gun, deep hole chit drill and depth twist drill Deng；Interior chip removal because system of processing used it is different, divide BTA depth drill, jet drilling and three kinds of DF depth drill, common spiral bit Have the following disadvantages, 1: drill head apical angle is 120 degree at present, is unfavorable for the vacuum adsorbing die of processing stainless steel material, 2: current Drill bit uses straight shank type drill head, and sword is longer, and the area of the longer contact hole of sword is excessive in deep hole machining, causes bit force excessive, Easily snap off, 3: flute of drill is more coarse at present, coarse that the increasing of chip removal frictional force is be easy to cause to cause in work pieces process Chip removal is difficult, causes bit force excessive, easily snaps off, it is therefore desirable to be further improved and perfect.

Utility model content

The technical problems to be solved in the utility model overcomes existing defect, provides the new drill for deep hole machining, Long service life is not easily broken, and blade apex angle is modified as 145 degree, sword length is set as 5MM, the drill bit blade apex angle of equivalent diameter Bigger cross cutting blade surface product is smaller, and chisel edge is smaller, and contact area is smaller when cutting, and the stress of blade is smaller when cutting, can be Extend the service life of drill bit while not reducing processing efficiency, the reason of hole depth leads to contact of the drillstock with hole in deep hole machining Area increases, and the diameter of section of drill bit is greater than the diameter of section 0.2MM of drillstock, it is possible to reduce the stress size of drill bit, in processing Do not allow frangibility, it, can be with by being RA0.8-RA0.4MM the first helical flute and the second helical flute surface roughness Reduce the frictional force between scrap and the first helical flute, the second helical flute, the stress that can reduce drill body is big It is small, it is not easily broken drill body, it is ensured that deep hole smoothly machine-shaping can effectively solve the problems in background technique.

In order to solve the above-mentioned technical problem, the utility model provides the following technical solution:

For the new drill of deep hole machining, including clamping head, the clamping head bottom is fixed with drillstock, the drillstock Bottom is fixed with drill bit, and the diameter of section of the drill bit is greater than the diameter of section 0.2MM of drillstock, and the drill bit bottom is fixed Equipped with blade, the blade apex angle is set as 145 degree, and blade sword length is set as 5MM, and the drillstock bottom outside surface is equipped with First helical flute, the drill bit outer surface are equipped with the second helical flute, and second helical flute and first Helical flute is connected.

Furthermore, the clamping head outer surface is equidistantly equipped with limit card slot, and the limit card slot is equipped with three groups.

Furthermore, the drill bit front side surface is provided tiltedly with dregs guiding groove, and the depth of the dregs guiding groove is less than second The depth of helical flute.

Furthermore, first helical flute and the second helical flute surface roughness are RA0.8- RA0.4MM。

The utility model is the utility model has the advantages that be used for the new drill of deep hole machining, service life involved in the utility model Length is not easily broken, and blade apex angle is modified as 145 degree, sword length is set as 5MM, the bigger transverse direction of drill bit blade apex angle of equivalent diameter Cutting edge area is smaller, and chisel edge is smaller, and contact area is smaller when cutting, and the stress of blade is smaller when cutting, can not reducing plus Extend the service life of drill bit while work efficiency rate, the reason of hole depth causes the contact area in drillstock and hole to add in deep hole machining Greatly, the diameter of section of drill bit is greater than the diameter of section 0.2MM of drillstock, it is possible to reduce the stress size of drill bit is not easy in processing It fractures, by being RA0.8-RA0.4MM the first helical flute and the second helical flute surface roughness, can reduce useless Bits and the frictional force between the first helical flute and the second helical flute, can reduce the stress size of drill body, make Drill body is not easily broken, it is ensured that deep hole smoothly machine-shaping.

Detailed description of the invention

Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention.

Fig. 1 is the new drill main view that the utility model is used for deep hole machining.

Figure label: 1, clamping head；2, drillstock；3, drill bit；4, blade；5, the first helical flute；6, the second spiral is arranged Consider slot to be worth doing；7, dregs guiding groove；8, limit card slot.

Specific embodiment

It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.

If Fig. 1-is shown, for the new drill of deep hole machining, including clamping head 1,1 bottom of clamping head is fixed with Drillstock 2,2 bottom of drillstock is fixed with drill bit 3, and the diameter of section of the drill bit 3 is greater than the diameter of section of drillstock 2 0.2MM, it is possible to reduce the stress size of drill bit 3 does not allow frangibility in processing, and 3 bottom of drill bit is fixed with blade 4, institute It states 4 apex angle of blade and is set as 145 degree, and 4 sword of blade length is set as 5MM, 3 blade of drill bit, the 4 bigger transverse direction of apex angle of equivalent diameter Cutting edge area is smaller, and chisel edge is smaller, and contact area is smaller when cutting, and the stress of blade is smaller when cutting, can not reducing plus Extend the service life of drill bit 3 while work efficiency rate, 2 bottom outside surface of drillstock is equipped with the first helical flute 5, described 3 outer surface of drill bit is equipped with the second helical flute 6, and second helical flute 6 is connected with the first helical flute 5 It connects, scrap discharge can be accelerated.

1 outer surface of clamping head is equidistantly equipped with limit card slot 8, and the limit card slot 8 is equipped with three groups, facilitates clamping First 1 with drilling machine is fixed is clamped, 3 front side surface of drill bit is provided tiltedly with dregs guiding groove 7, and the depth of the dregs guiding groove 7 is less than the The depth of two helical flutes 6 facilitates and scrap is imported 6 inner cavity of the second helical flute, facilitates chip removal, the first spiral row Considering slot 5 and 6 surface roughness of the second helical flute to be worth doing is RA0.8-RA0.4MM, can reduce scrap and the first helical flute 5, the frictional force between the second helical flute 6, can reduce the stress size of drill body, is not easily broken drill body.

Utility model works principle: 4 apex angle of blade is modified as 145 degree, sword length is set as 5MM, the drill bit 3 of equivalent diameter 4 apex angle of blade bigger cross cutting blade surface product is smaller, and chisel edge is smaller, and contact area is smaller when cutting, the stress of blade 4 when cutting It is smaller, the service life of drill bit 3 can be extended while not reducing processing efficiency, by the first helical flute 5 and second 6 surface roughness of helical flute is RA0.8-RA0.4MM, can reduce scrap and the first helical flute 5 and the second spiral Frictional force between chip space 6 can reduce the stress size of drill body, be not easily broken drill body.

The above are the preferable embodiment of the utility model, the utility model those skilled in the art can also be to upper It states embodiment to change and modify, therefore, the utility model is not limited to above-mentioned specific embodiment, all abilities Field technique personnel made any conspicuous improvement, replacement or modification on the basis of the utility model belong to practical Novel protection scope.

Claims (4)

1. being used for the new drill of deep hole machining, including clamping head (1), it is characterised in that: clamping head (1) the bottom fixation is set Have drillstock (2), drillstock (2) bottom is fixed with drill bit (3), and the diameter of section of the drill bit (3) is greater than drillstock (2) Diameter of section 0.2MM, drill bit (3) bottom are fixed with blade (4), and blade (4) apex angle is set as 145 degree, and described Blade (4) sword is long to be set as 5MM, and drillstock (2) bottom outside surface is equipped with the first helical flute (5), and the drill bit (3) is outside Side surface is equipped with the second helical flute (6), and second helical flute (6) is connected with the first helical flute (5).

2. the new drill according to claim 1 for deep hole machining, it is characterised in that: on the outside of the clamping head (1) Surface is equidistantly equipped with limit card slot (8), and the limit card slot (8) is equipped with three groups.

3. the new drill according to claim 1 for deep hole machining, it is characterised in that: table on front side of the drill bit (3) Face is provided tiltedly with dregs guiding groove (7), and the depth of the dregs guiding groove (7) is less than the depth of the second helical flute (6).

4. the new drill according to claim 1 for deep hole machining, it is characterised in that: first helical flute It (5) is RA0.8-RA0.4MM with the second helical flute (6) surface roughness.