CN207358224U - A kind of brill milling one compound tool for blind threaded processing - Google Patents
A kind of brill milling one compound tool for blind threaded processing Download PDFInfo
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- CN207358224U CN207358224U CN201721453439.5U CN201721453439U CN207358224U CN 207358224 U CN207358224 U CN 207358224U CN 201721453439 U CN201721453439 U CN 201721453439U CN 207358224 U CN207358224 U CN 207358224U
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Abstract
A kind of brill milling one compound tool of the blind threaded processing of the utility model, including handle of a knife and cutter hub, cutter hub includes the drilling blade set gradually, screw thread blade and chamfering blade, cutter hub is equipped with two helical flutes that handle of a knife is extended to from drilling blade, drilling blade includes main cutting edge and circumferential cutting edge, drilling blade forms drilling sword valve between two helical flutes, drilling sword valve is made of the second curved surface and first surface set gradually along cutter direction of rotation, first surface is crossed to form circumferential cutting edge with helical flute, the radius of circumferential cutting edge is R1, the intersection radius of first surface and the second curved surface is R3, the radius of first surface any point between circumferential cutting edge and intersection is R2, second curved surface any point radius is R4, R1 ＞ R2 ＞ R3=R4.During the utility model drilling bottom outlet, only circumferential cutting edge contacts milling with hole wall, and first surface is not involved in milling, avoids the severe friction with hole wall, improves the knife service life.
Description
Technical field
It the utility model is related to metal-cutting machine tool, more particularly to a kind of one bluk recombination of brill milling for blind threaded processing
Cutter.
Background technology
The processing of threaded hole is typically that point three processes are formed, i.e. drilling, chamfering, tapping separate machined, can be brought
, there are 2 problems in the drawbacks of can not overcoming in brief：1）Number of cutters is more, and tool magazine capacity is required；2）Change No. 3 knife ability
Whole hole processing is completed, processing efficiency is low.
To solve the problems, such as this, there has been proposed a variety of solutions, common approach be by bit part, threaded portion and
Other parts（Such as chamfering, fraising）It is sequentially arranged along axis, an axial feed is the whole processing for completing threaded hole.In China
Patent document CN202963682U discloses a kind of thread mill drilling cutter, including knife bar and cutter head, and whole cutter is using hard
Matter alloy is process, and cutter head is divided into front and rear two parts, and front portion is drill bit, and rear portion is screw tap, and the diameter of drill bit is less than screw tap
Diameter, a procedure can complete the processing of threaded hole.Equally, one kind is disclosed in Chinese patent literature CN104625254A
Compound thread cutter and Screw thread process method, the cutter include bit head, reamer, tapping thread portion, the bit head, reamer,
Tapping thread portion is coaxially disposed, and the disposable processing for completing threaded hole, without carrying out complicated device to hole and correction, simplifies processing
Program, improves production efficiency.Above-mentioned two invention processing through hole has no problem, and bit part or reamer part drill out completely
Rear thread part starts to process again outside hole, but processing blind hole can have that two can not solve.First, during processing blind hole,
Bit part will not be stretched out outside hole, necessarily cause bit part and threaded portion to simultaneously participate in cutting.And in order to ensure screw thread ruler
Very little, its screw thread process part feed engagement Fn is necessarily equal to pitch P, by taking M10 screw threads as an example, Fn=1.5mm, and bit part
The Fn that Fn generally allows only has 0.2~0.5mm, and during screw thread process, bit part can not bear such big cutting parameter,
Bit part tipping is easily caused even to fracture；Secondly as there is longer bit part in leading portion（Reamer）Part, therefore meeting
Cause useful thread inadequate, for some particular/special requirement screw threads, such as screw thread without transitional pore or escape, being can not
Processing.
In order to solve blind threaded processing, the prior art proposes another solution, mainly using thread milling
Technique.As disclosed a kind of hard alloy for having drilling, screw thread and chamfering function concurrently in Chinese patent literature CN202539726U
Compound tool.Including drill bit, screwer, rose reamer and handle of a knife, the drill bit, screwer, rose reamer and handle of a knife are in turn connected into
For entirety, which provides one kind when in use without tool changing, it is only necessary to which numerical control programming is with regard to that can complete threaded bore.
In its content of the invention, the process for how using numerical control programming specific implementation is described in detail, but it simply simply represents one
Kind has the hard alloy compound tool structure of drilling, screw thread and chamfering function concurrently, and there are column sword at its drill bit back（Such as Fig. 1 institutes
Show）, keep contacting with the hole wall moment in process, play guiding and improve the effect of hole wall surface quality, therefore in milling spiral shell
During line, drill bit and hole wall frictional force are big, and fever is serious, directly result in cutter life decline.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of the prior art and provide a kind of simple in structure, raising
The brill milling one compound tool for blind threaded processing of cutter life.
In order to solve the above technical problems, the utility model uses following technical scheme：
A kind of brill milling one compound tool for blind threaded processing, including handle of a knife and cutter hub, the cutter hub include according to
Drilling blade, screw thread blade and the chamfering blade of secondary setting, the chamfering blade are connected with handle of a knife, the cutter hub be equipped with two from
Drilling blade extends to the helical flute of handle of a knife, and the drilling blade includes main cutting edge and circumferential cutting edge, the drilling sword
Portion forms drilling sword valve between two helical flutes, the drilling sword valve by set gradually along cutter direction of rotation
Two curved surfaces and first surface are formed, and the first surface is crossed to form the circumferential cutting edge, the circumferential direction cutting edge of a knife or a sword with helical flute
The radius of sword is R1, and the radius of the intersection of the first surface and the second curved surface is R3, the first surface in circumferential cutting edge with
The radius of any point is R2 between the intersection, and the radius at described second curved surface any point is R4, then R1 ＞ R2 ＞ R3=R4.
Further as above-mentioned technical proposal is improved：
The axial length of the circumferential direction cutting edge is L, and the pitch of the screw thread blade is P, then L≤3P.
Angle between the bottom surface of the first surface and excessively circumferential cutting edge and the face parallel with cutter hub axial cross section is α,
Then 2 ° of 12 ° of ＜ α ＜.
A diameter of D1, a diameter of D2 of the screw thread blade of the circumferential direction cutting edge, then D2 ＜ D1.
The helical flute is right-handed spiral configuration, and the helical angle of the helical flute is β, then 35 ° of β ＜.
Compared with prior art, the utility model has the advantage of：
The brill milling one compound tool for blind threaded processing of the utility model, the circumferential right first surface of land
Formed with the second curved surface, the radius of circumferential cutting edge is more than first surface any point（Any point on first surface removes herein
Circumferential cutting edge）With the radius of the second curved surface any point, that is to say, that when drawbore, only circumferential cutting edge contacts milling with hole wall
Cut, and first surface is not involved in milling, therefore avoid and improve cutter life with the severe friction of hole wall, in addition, the
The radius curved-surface structures such as two curved surfaces use, ensure that the sharpness and rigidity of cutter hub entirety, reduce cutting heat, further extend
Cutter life.
Brief description of the drawings
Fig. 1 be in the prior art processing blind hole when cutter column sword contact schematic diagram with hole wall.
Fig. 2 is the structure diagram of the utility model.
Fig. 3 is enlarged drawing at M in Fig. 2.
Fig. 4 is F-F sectional views in Fig. 2.
Each label represents in figure：
1st, handle of a knife；2nd, cutter hub；3rd, drilling blade；31st, main cutting edge；32nd, circumferential cutting edge；33rd, drilling sword valve；331st, first
Curved surface；332nd, the second curved surface；4th, screw thread blade；5th, chamfering blade；6th, helical flute.
Embodiment
The utility model is described in further detail below in conjunction with Figure of description and specific embodiment.
As shown in Figures 2 to 4, the brill milling one compound tool for blind threaded processing of the present embodiment, including handle of a knife 1
With cutter hub 2, cutter hub 2 includes drilling blade 3, screw thread blade 4 and the chamfering blade 5 set gradually, and chamfering blade 5 connects with handle of a knife 1
Connect, cutter hub 2 is equipped with two helical flutes 6 that handle of a knife 1 is extended to from drilling blade 3, and drilling blade 3 includes 31 He of main cutting edge
Circumferential cutting edge 32, drilling blade 3 form drilling sword valve 33 between two helical flutes 6, and drilling sword valve 33 is by along cutter
The second curved surface 332 and first surface 331 that direction of rotation is set gradually are formed, and first surface 331 intersects shape with helical flute 6
Circumferentially cutting edge 32, the radius of circumferential cutting edge 32 is R1, and the radius of the intersection of 331 and second curved surface 332 of first surface is R3, the
The radius of one curved surface 331 any point between circumferential cutting edge 32 and intersection is R2, and the radius at 332 any point of the second curved surface is
R4, then R1 ＞ R2 ＞ R3=R4.
In the present embodiment, circumferential right 331 and second curved surface 332 of first surface in 32 back of cutting edge is formed, circumferential cutting edge 32
Radius is more than 331 any point of first surface（Any point on first surface 331 removes circumferential cutting edge 32 herein）It is bent with second
The radius of 332 any point of face, that is to say, that when drawbore, only circumferential cutting edge 32 contacts milling with hole wall, and first surface
331 are not involved in milling, therefore avoid and improve cutter life with the severe friction of hole wall, in addition, the second curved surface 332 is adopted
With radius curved-surface structure is waited, the sharpness and rigidity of cutter hub entirety ensure that, reduce cutting heat, further extend the cutter longevity
Life.
As shown in figure 4, in the longitudinal cross-section of 2 axis of cutter hub, circular arc ac represents first surface 331, circular arc cd
The second curved surface 332 is represented, a points are a bit on circumferential cutting edge 32, and c points is on 331 and second curved surface of first surface, 332 intersections
A bit, b points are any point on first surface 331 in addition to circumferential cutting edge 32 and intersection, and d points are the border of the second curved surface 332
On line a bit.If a, the distance of b, c, d distance O are Roa, Rob, Roc, Rod successively, that is to say, that R1 Roa, R2 are
Rob, R3 Roc, R4 Rod, Roa ＞ Rob ＞ Roc ＞ Rod.In the Y-axis direction, a points highest.Circular arc ac is radius unequal
Circular arc, circular arc cd for etc. radius arc, i.e. first surface 331 be radius unequal curved surface, and the second curved surface 332 is grade radius curved surface.
The axial length of circumferential cutting edge 32 is L, and the pitch of screw thread blade 4 is P, then L≤3P, to ensure the screw thread processed
Effective depth.In the present embodiment, P=1.5mm, L=4mm.
Angle between the bottom surface of first surface 331 and excessively circumferential cutting edge 32 and the face parallel with 2 axial cross section of cutter hub is
α, then 2 ° of 12 ° of ＜ α ＜.As shown in figure 4, straight line X1 was a points and parallel with X-axis, i.e. straight line X1 be circumferential cutting edge 32 and with
Straight line in the parallel face of 2 axial cross section of cutter hub, the angle of straight line ab and straight line X1 is α, which is the footpath of circumferential cutting edge 32
To relief angle, in the present embodiment, 10 ° of α values.
In the present embodiment, a diameter of D1 of circumferential cutting edge 32, a diameter of D2 of screw thread blade 4, then D2 ＜ D1, it is ensured that boring
Screw thread blade 4 does not participate in cutting during bottom outlet, reduces the surplus of thread milling, extends the service life of screw thread blade 4.
Helical flute 6 is right-handed spiral configuration, so as to ensure that Tool in Cutting is brisk, and the helical angle of helical flute 6（Figure
Not shown in）Less than 35 °, in the present embodiment, 30 ° of helical angle value.
Although the utility model has been disclosed with preferred embodiment as above, but it is not limited to the utility model.It is any
Those skilled in the art, in the case where not departing from technical solutions of the utility model scope, all using the disclosure above
Technology contents technical solutions of the utility model are made with many possible changes and modifications, or be revised as the equivalent of equivalent variations
Embodiment.Therefore, every content without departing from technical solutions of the utility model, according to the utility model technical spirit to real above
Any simple modifications, equivalents, and modifications that example is done are applied, should all be fallen in the range of technical solutions of the utility model protection.
Claims (5)
1. a kind of brill milling one compound tool for blind threaded processing, including handle of a knife（1）And cutter hub（2）, the cutter hub（2）
Including the drilling blade set gradually（3）, screw thread blade（4）With chamfering blade（5）, the chamfering blade（5）With handle of a knife（1）Even
Connect, the cutter hub（2）Equipped with two from drilling blade（3）Extend to handle of a knife（1）Helical flute（6）, it is characterised in that：Institute
State drilling blade（3）Including main cutting edge（31）With circumferential cutting edge（32）, the drilling blade（3）In two helical flutes
（6）Between form drilling sword valve（33）, the drilling sword valve（33）By the second curved surface set gradually along cutter direction of rotation
（332）And first surface（331）Form, the first surface（331）With helical flute（6）It is crossed to form the circumferential cutting edge
（32）, the circumferential direction cutting edge（32）Radius be R1, the first surface（331）With the second curved surface（332）Intersection radius
For R3, the first surface（331）In circumferential cutting edge（32）The radius of any point is R2 between the intersection, and described second is bent
Face（332）The radius at any point is R4, then R1 ＞ R2 ＞ R3=R4.
2. the brill milling one compound tool according to claim 1 for blind threaded processing, it is characterised in that：The week
To cutting edge（32）Axial length be L, the screw thread blade（4）Pitch be P, then L≤3P.
3. the brill milling one compound tool according to claim 1 for blind threaded processing, it is characterised in that：Described
One curved surface（331）Bottom surface and excessively circumferential cutting edge（32）And and cutter hub（2）Angle between the parallel face of axial cross section is α, then
2 ° of 12 ° of ＜ α ＜.
4. the brill milling one compound tool for blind threaded processing according to claims 1 to 3 any one, its feature
It is：The circumferential direction cutting edge（32）A diameter of D1, the screw thread blade（4）A diameter of D2, then D2 ＜ D1.
5. the brill milling one compound tool according to claim 4 for blind threaded processing, it is characterised in that：The spiral shell
Revolve chip space（6）For right-handed spiral configuration, and the helical flute（6）Helical angle be less than 35 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721453439.5U CN207358224U (en) | 2017-11-03 | 2017-11-03 | A kind of brill milling one compound tool for blind threaded processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721453439.5U CN207358224U (en) | 2017-11-03 | 2017-11-03 | A kind of brill milling one compound tool for blind threaded processing |
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| Publication Number | Publication Date |
|---|---|
| CN207358224U true CN207358224U (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721453439.5U Active CN207358224U (en) | 2017-11-03 | 2017-11-03 | A kind of brill milling one compound tool for blind threaded processing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253056A (en) * | 2019-07-24 | 2019-09-20 | 巴恩斯注塑工业(江苏)有限公司 | A kind of thread integrated molding drill mill |
| CN112756718A (en) * | 2020-12-25 | 2021-05-07 | 深圳市力博刀具技术有限公司 | PCD cutter for efficiently machining threads |
-
2017
- 2017-11-03 CN CN201721453439.5U patent/CN207358224U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110253056A (en) * | 2019-07-24 | 2019-09-20 | 巴恩斯注塑工业(江苏)有限公司 | A kind of thread integrated molding drill mill |
| CN112756718A (en) * | 2020-12-25 | 2021-05-07 | 深圳市力博刀具技术有限公司 | PCD cutter for efficiently machining threads |
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