CN104227093A - Drill point centering countersinking cutter - Google Patents

Drill point centering countersinking cutter Download PDF

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Publication number
CN104227093A
CN104227093A CN201410465451.2A CN201410465451A CN104227093A CN 104227093 A CN104227093 A CN 104227093A CN 201410465451 A CN201410465451 A CN 201410465451A CN 104227093 A CN104227093 A CN 104227093A
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CN
China
Prior art keywords
apex point
blade
main
cutter hub
auxiliary
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Granted
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CN201410465451.2A
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Chinese (zh)
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CN104227093B (en
Inventor
班华威
刘仁华
陈佳林
张应富
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GUANGXI YULIN DAYE MACHINERY PARTS MANUFACTURING Co Ltd
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GUANGXI YULIN DAYE MACHINERY PARTS MANUFACTURING Co Ltd
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Priority to CN201410465451.2A priority Critical patent/CN104227093B/en
Publication of CN104227093A publication Critical patent/CN104227093A/en
Application granted granted Critical
Publication of CN104227093B publication Critical patent/CN104227093B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/10Bits for countersinking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2251/00Details of tools for drilling machines
    • B23B2251/40Flutes, i.e. chip conveying grooves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

The invention discloses a drill point centering countersinking cutter. The drill point centering countersinking cutter comprises a cutter handle, a cutter body, a main blade and an auxiliary blade group; the rear end of the cutter body is connected with the front end of the cutter handle; the main blade which is arranged at the front end of the cutter body comprises two cutting portions which are in blade shapes; the two cutting portions are reversely arranged and accordingly two main cutting edges of the two cutting portions are respectively arranged on two opposite sides of the main blade; two rear cutter faces of the two cutting portions jointly form into a main rear cutter face of the main blade; the middle of the main rear cutter face is provided with a protruding drill point; the front end of the cutter body is provided with two main chip removal grooves corresponding to two front cutter faces of the two cutting portions; the auxiliary blade group comprises auxiliary blades which are arranged at the front end of the cutter body and on bilateral sides of the main blade. According to the drill point centering countersinking cutter, the main blade comprises the two cutting portions and the drill point, can ream rough and high-hardness blank surfaces and machine a guide hole which enables follow-up drilling to be facilitated and has a centering effect, so that the cutting tool machining vibration is relieved, the machining efficiency is high, and the service life is long.

Description

Apex point centering countersink
Technical field
The present invention relates to countersink field, particularly a kind of apex point centering countersink.
Background technology
In machined process industry, nail was carried out or thread Pilot hole adds man-hour at the black skin cast by casting pig such as cooler for engine oil cover etc., traditional processing technology is generally divided into two kinds: the first first uses centre drill centering on black skin, then bit bore is used, finally re-use traditional flat spot face of countersink ream, traditional countersink lays several blades at cutter hub front end edge even circumferential, the rear knife face of blade protrudes from the front end face of cutter hub, with the flat black skin of cutting edge ream by blade, each blade of this kind of countersink is separate, empty in the middle of the front end of cutter hub, the countersink of this quasi-tradition must get out the suitable hole ability flat spot face of ream further by drill bit on black skin, and directly can not put down the black skin of also not holing by ream, the second uses the flat-bottom end mill first direct flat black skin of ream, and then hole.But due to factors such as the out-of-flatness of casting pig black skin, coarse and hardness are high, often cause the drill bit of the first processing technology easy tipping and Fast Wearing when cutting blank sclerderm surface, and the work step of this technique is various, reduces production efficiency.Although and the second processing technology has obvious lifting (saving centering work step) in production efficiency, but because the linear velocity that flat-bottom end mill has center sword is the characteristic of zero, this makes center sword become the cutting of strong squash type in process, very easily causes center sword to collapse brokenly.The out-of-flatness of black skin makes the unbalanced tool sharpening that also causes of cutting force vibrate in addition, accelerates the wearing and tearing of cutter, affects the rated life time of cutter, cause the high cost of charp tool.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of apex point centering countersink, its can the flat out-of-flatness of ream reposefully, coarse and high rigidity black skin, and process the centre pilot hole being beneficial to follow-up boring, sword extruding in center can be avoided to cut, thus ensure working (machining) efficiency, improve cutter life and reduce the cost of charp tool.
For achieving the above object, the invention provides a kind of apex point centering countersink, comprising: handle of a knife; Cutter hub, its rear end is connected with the front end of described handle of a knife; Wherein, also comprise: main blade, it is arranged at the front end of described cutter hub, and this main blade comprises two in cultrate cutting portion, and the rear knife face of this cutting portion protrudes from the front end face of described cutter hub; Described two cutting portions are oppositely arranged, and lay respectively at the both sides of described main blade through-thickness to make two of these two cutting portions main cutting edges; After two of described two cutting portions, knife face forms knife face after the master of described main blade jointly, and after this master, the middle part of knife face is provided with protruding apex point, and this apex point is corresponding with the axis of described cutter hub; Two rake faces that the front end of described cutter hub corresponds to described two cutting portions are respectively arranged with two main chip areas.
Preferably, in technique scheme, described apex point comprise two respectively by the rear knife face of described two cutting portions to knife face after the protruding obliquely apex point of the middle upper part of knife face after master, after these two apex points, the protruding end of knife face is intersected, and an apex point chisel edge is formed in intersection, the mid point of this apex point chisel edge is positioned on the axis of described cutter hub; The side that after each described apex point, knife face is corresponding with the main cutting edge of the described cutting portion at its place is the apex point cutting edge of described apex point.
Preferably, in technique scheme, the angle of the projection of two apex point cutting edges in the plane at the rake face place of cutting portion described in one of them of described apex point is apex point angle, and the size of this apex point angle is 110 ° ~ 135 °.
Preferably, in technique scheme, the length of described apex point chisel edge is 1 ~ 2mm, and described apex point chisel edge 0.8 ~ 1.5mm higher than the main cutting edge of described cutting portion.
Preferably, in technique scheme, the front end of described cutter hub is provided with two apex point chip areas corresponding with described two apex point cutting edges respectively, and these two apex point chip areas are communicated with described two main chip areas respectively.
Preferably, in technique scheme, the width of described apex point chip area is 3.5 ~ 4mm.
Preferably, in technique scheme, the front end of described cutter hub is provided with at least one auxiliary-blade group; Each described auxiliary-blade group comprises the auxiliary-blade that two are distributed in the both sides of described main blade, and the main cutting edge of described auxiliary-blade and the main cutting edge of described cutting portion are in the same plane perpendicular to described cutter hub axis; And the main cutting edge of two described auxiliary-blades of each described auxiliary-blade group is positioned on the straight line of the axes intersect of same and described cutter hub; The rake face that the front end of described cutter hub corresponds to described auxiliary-blade is provided with secondary chip area.
Preferably, in technique scheme, the front end of described cutter hub is provided with a described auxiliary-blade group, the main cutting edge of two described auxiliary-blades of this auxiliary-blade group be positioned at same and described cutter hub axes intersect and on straight line perpendicular to described main blade.
Preferably, in technique scheme, described main blade and auxiliary-blade are fixedly installed on the front end of described cutter hub by the mode of welding.
Preferably, in technique scheme, described main blade and auxiliary-blade and described cutter hub integrally formed.
Compared with prior art, the present invention has following beneficial effect:
1, main blade of the present invention forms in cultrate cutting portion by two, and main blade is provided with apex point, the certralizing ability of apex point can alleviate the vibration of cutter in process, make cutter can the flat out-of-flatness of ream stably, coarse and high rigidity black skin, the black skin of not holing can be directly applied for, the centre pilot hole being beneficial to follow-up boring can also be processed simultaneously, easy tipping can be avoided, the object of highly-efficient processing, raising cutter life and the reduction cost of charp tool can be reached again.
2, the apex point on main blade of the present invention protrudes by two and after the apex point intersected, knife face is formed, after these two, knife face is respectively arranged with two apex point cutting edges, processing and reconditioning shaping is easy to make apex point, and ensure that apex point has enough intensity, to improve working (machining) efficiency further and to ensure cutter life.
3, the present invention is by arranging auxiliary-blade group in the front end of cutter hub, and cutting force is uniformly distributed, and alleviates processing vibration further, improves working (machining) efficiency, and extend the life-span of main blade.
4, main blade of the present invention and auxiliary-blade are fixed on cutter hub front end by the mode of welding, or main blade and auxiliary-blade integrally formed with cutter hub, its manufacture and easy to process, and the rigidity of cutter can be improved.
Accompanying drawing explanation
Fig. 1 is the perspective view according to apex point centering countersink of the present invention.
Fig. 2 is the top view of the Fig. 1 according to apex point centering countersink of the present invention.
Fig. 3 is the perspective view of the main blade according to apex point centering countersink of the present invention.
Main Reference Numerals illustrates:
1-handle of a knife; 2-cutter hub, the main chip area of 21-, the secondary chip area of 22-, 23-apex point chip area; 3-main blade, 31-cutting portion, knife face after 311-cutting portion, 312-cutting portion main cutting edge, 313-cutting portion rake face; 32-apex point, knife face after 321-apex point, 322-apex point chisel edge, 323-apex point cutting edge; 4-auxiliary-blade, 41-auxiliary-blade main cutting edge.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of detailed description of the invention.
Clearly represent unless otherwise other, otherwise in whole description and claims, term " comprise " or its conversion as " comprising " or " including " etc. by be understood to include the element of stating or part, and do not get rid of other element or other part.
As shown in Figure 1 to Figure 3, according to a kind of apex point centering countersink of the specific embodiment of the invention, it comprises: handle of a knife 1, cutter hub 2 and main blade 3, wherein:
As shown in Figure 1, the rear end of cutter hub 2 is connected with the front end of handle of a knife 1, and cutter hub 2 is coaxial with handle of a knife 1.Main blade 3 is fixedly installed on the front end of cutter hub 2.As shown in Figures 2 and 3, main blade 3 comprises two in cultrate cutting portion 31, cutting portion 31 is identical with the structure of traditional plane countersink blade, the rear knife face of cutting portion 31 is knife face 311 after cutting portion, the main cutting edge of cutting portion 31 is cutting portion main cutting edge 312, and the rake face of cutting portion 31 is cutting portion rake face 313.When main blade 3 is installed on the front end of cutter hub 2, after the cutting portion of cutting portion 31, knife face 311 protrudes from the front end face of cutter hub 2.These two cutting portions 31 oppositely arrange also integrally formed form main blade 3, and after the cutting portion of these two cutting portions 31, knife face 311 forms knife face after the master of main blade 3 jointly.Because two cutting portions 31 are oppositely arranged, and cutting portion 31 has certain relief angle, therefore the incline direction of knife face 311 is contrary after two cutting portions, two cutting portion main cutting edges 312 lay respectively at the contrary both sides of main blade 3 through-thickness, accordingly, two cutting portion rake faces 313 lay respectively at the contrary both sides of main blade 3 through-thickness; The front end of cutter hub 2 is provided with two main chip areas 21 corresponding with these two cutting portion rake faces 313.When cutter rotates, these two cutting portion main cutting edges 312 can cut black skin along direction of rotation simultaneously, and carry out chip removal by main chip area 21.After the master of main blade 3, the middle part of knife face is provided with protruding apex point 32, and apex point 32 is corresponding with the axis of cutter hub 1.When cutter carries out adding man-hour, apex point 32 first gets out centre pilot hole on black skin, to feel relieved to cutter, thus reduce the vibration of cutter in process, make two cutting portion main cutting edges 312 can the flat black skin of ream reposefully, and process the centre pilot hole being conducive to follow-up boring, the extruding of center sword can be avoided to cut by arranging apex point 32 simultaneously.
Preferably, as shown in Figure 3, apex point 32 comprise two respectively by knife face 311 after two cutting portions obliquely to knife face 321 after the apex point of the middle upper part projection of knife face after the master of main blade 3, after these two apex points, the protruding end of knife face 321 is intersected, and an apex point chisel edge 322 is formed in intersection, the mid point of this apex point chisel edge 322 is positioned on the axis of cutter hub 2.The side that after each apex point, knife face 321 is corresponding with the cutting portion main cutting edge 312 of the cutting portion 31 at its place is the apex point cutting edge 323 of apex point 32, therefore, after two apex points, knife face 321 has two apex point cutting edges 323 respectively, and these two apex point cutting edges 323 are connected with corresponding two cutting portion main cutting edges 312 respectively.The angle of the projection of these two apex point cutting edges 323 in the plane at one of them cutting portion rake face 313 place is apex point angle, desirable 110 ° ~ 135 ° of the size of this apex point angle.Preferably, the angle of apex point angle is 118 °.Apex point 32 is made up of knife face 321 after two protruding apex points, make apex point 32 protruding in triangular shape, apex point 32 also can be arranged to the projection of coniform other shapes such as grade, but relative to the other forms of projection of employing, apex point 32 is more prone to reconditioning and is shaped in triangular shape projection, and there is better intensity, longer service life.In addition, owing to needing certain relief angle to ensure the intensity of apex point cutting edge 323, preferably, as shown in Figure 2, primary relief is set to 3 ~ 8 °, namely after two apex points, knife face 321 tilts 3 ~ 8 ° relative to the thickness direction of main blade 3 simultaneously, thus makes apex point chisel edge 322 and non-perpendicular to cutting portion main cutting edge 312.The height of apex point 32 projection determines the height of apex point chisel edge 322, and preferably, apex point chisel edge 322 exceeds 0.8 ~ 1.5mm than cutting portion main cutting edge 312; And by carrying out reconditioning to both sides apex point 32 corresponding to apex point chisel edge 322, with the length reconditioning of apex point chisel edge 322 for 1 ~ 2mm, the degree of depth and the suitable centre pilot hole of diameter can be processed again on black skin to make the existing enough intensity of apex point 32, avoid the long and apex point 32 of apex point chisel edge 322 too high and affect cutting-tool's used life, also avoid the too short and apex point 32 of apex point chisel edge 322 too low and suitable centre pilot hole can not be processed on black skin, cause centre pilot hole not have centering and reduce the effect of vibration.Preferably, apex point chisel edge 322 exceeds 1mm than cutting portion main cutting edge 312.Further preferably, as depicted in figs. 1 and 2, the front end of cutter hub 2 is provided with two apex point chip areas 23 corresponding with two apex point cutting edges 323 respectively, and these two apex point chip areas 23 are communicated with corresponding two main chip areas 21 respectively, the width of apex point chip area 23 is consistent with the thickness direction of main blade 3, and the width of apex point chip area 23 is 3.5 ~ 4mm, namely cutting portion rake face 313 is 3.5 ~ 4mm with the distance of the sidewall of apex point chip area 23.Apex point chip area 23 is convenient to chip removal when apex point 32 carries out machining, the iron filings that apex point 32 pairs of black skins carry out producing in working angles enter into main chip area 21 by apex point chip area 23, and finally discharged by main chip area 21, apex point chip area 23 can prevent swaging clamp and tipping, to improve cutting-tool's used life, and by arranging apex point chip area 23, the reconditioning that can be apex point 32 provides enough spaces, to facilitate, the reconditioning of apex point 32 is processed.
Further, as depicted in figs. 1 and 2, the front end of cutter hub 2 is provided with at least one auxiliary-blade group; Each auxiliary-blade group comprises the auxiliary-blade 4 that two are distributed in the both sides of main blade 3, the structure of auxiliary-blade 4 is identical with the blade structure of traditional plane countersink, the main cutting edge of auxiliary-blade 4 is that sword 41 is cut in auxiliary-blade operator, auxiliary-blade main cutting edge 41 and cutting portion main cutting edge 312 are in the plane of the same axis perpendicular to cutter hub 2, and the auxiliary-blade main cutting edge 41 of two auxiliary-blades 4 in each auxiliary-blade group is positioned at same as on the straight line of the axes intersect of cutter hub 2.Preferably, the auxiliary-blade 4 being positioned at main blade 3 both sides is uniformly distributed respectively.The rake face that the front end of cutter hub 2 corresponds to each auxiliary-blade 4 is provided with a secondary chip area 22, so that the chip removal when machining.By arranging auxiliary-blade group and the main blade 3 flat black skin of ream simultaneously, cutting force is uniformly distributed, and shares by auxiliary-blade 4 cutting force that main blade 3 bears, processing vibration can be alleviated further, improve working (machining) efficiency, and extend the life-span of main blade 3.Preferably, as depicted in figs. 1 and 2, the front end of cutter hub 2 is provided with an auxiliary-blade group, the auxiliary-blade main cutting edge 41 of two auxiliary-blades 4 of this auxiliary-blade group is positioned at the same axes intersect with cutter hub 2 and on the straight line perpendicular to main blade 3, with the front end making two auxiliary-blades 4 and main blade 3 be arranged at cutter hub 2 in cross.Auxiliary-blade group also can arrange rational quantity according to the concrete size of cutter hub 2 diameter.
Preferably, the front end correspondence of cutter hub 2 is provided with main blade mounting groove and auxiliary-blade mounting groove, in the main blade mounting groove that main blade 3 and auxiliary-blade 4 are fixed on the front end of cutter hub 2 by the mode of welding and auxiliary-blade mounting groove.For guaranteeing the machining accuracy of cutter, first the cutter blank of main blade 3 and auxiliary-blade 4 can be welded in main blade mounting groove on cutter hub 2 and auxiliary-blade mounting groove, then with the axis of cutter hub 2 for benchmark, reconditioning shaping is carried out to the cutter blank of main blade 3 and auxiliary-blade 4, it is easily manufactured, cost is lower, and the precision of cutter is higher.Or main blade 3 and auxiliary-blade 4 integrally formed with cutter hub 2, namely directly process main blade 3 and auxiliary-blade 4 in the front end of cutter hub 2 by reconditioning, it is easily manufactured, and be convenient to the main blade 3 after to wearing and tearing and auxiliary-blade 4 reconditioning again, the precision of cutter is higher simultaneously; Further, handle of a knife 1 is integrally formed with cutter hub 2, with the rigidity of the accuracy of manufacture and cutter entirety that improve cutter.
Apex point of the present invention centering countersink is used to carry out adding man-hour, the apex point 32 of main blade 3 first carries out drilling on out-of-flatness, the black skin that coarse and hardness is high, thus avoid extrusion process, ensure cutter life, and on black skin, first get out center by apex point 32 and draw hole, the effect of centering can be reached, alleviate the vibration of cutter, and provide guide effect for follow-up boring.Along with cutter continues down-cutting, black skin ream is put down by cutting portion main cutting edge 312 and auxiliary-blade cutting edge 41 simultaneously.The present invention can be directly applied for do not hole and out-of-flatness, the black skin that coarse and hardness is high, it is easily manufactured, and cost is lower, and has higher intensity, and working (machining) efficiency is high, long service life.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.

Claims (10)

1. an apex point centering countersink, comprising:
Handle of a knife;
Cutter hub, its rear end is connected with the front end of described handle of a knife;
It is characterized in that, also comprise:
Main blade, it is arranged at the front end of described cutter hub, and this main blade comprises two in cultrate cutting portion, and the rear knife face of this cutting portion protrudes from the front end face of described cutter hub;
Described two cutting portions are oppositely arranged, and lay respectively at the both sides of described main blade through-thickness to make two of these two cutting portions main cutting edges;
After two of described two cutting portions, knife face forms knife face after the master of described main blade jointly, and after this master, the middle part of knife face is provided with protruding apex point, and this apex point is corresponding with the axis of described cutter hub;
Two rake faces that the front end of described cutter hub corresponds to described two cutting portions are respectively arranged with two main chip areas.
2. apex point centering countersink according to claim 1, it is characterized in that, described apex point comprise two respectively by the rear knife face of described two cutting portions to knife face after the protruding obliquely apex point of the middle upper part of knife face after master, after these two apex points, the protruding end of knife face is intersected, and an apex point chisel edge is formed in intersection, the mid point of this apex point chisel edge is positioned on the axis of described cutter hub;
The side that after each described apex point, knife face is corresponding with the main cutting edge of the described cutting portion at its place is the apex point cutting edge of described apex point.
3. apex point centering countersink according to claim 2, it is characterized in that, the angle of the projection of two apex point cutting edges in the plane at the rake face place of cutting portion described in one of them of described apex point is apex point angle, and the size of this apex point angle is 110 ° ~ 135 °.
4. apex point centering countersink according to claim 2, it is characterized in that, the length of described apex point chisel edge is 1 ~ 2mm, and described apex point chisel edge 0.8 ~ 1.5mm higher than the main cutting edge of described cutting portion.
5. apex point according to claim 2 centering countersink, is characterized in that, the front end of described cutter hub is provided with two apex point chip areas corresponding with described two apex point cutting edges respectively, and these two apex point chip areas are communicated with described two main chip areas respectively.
6. apex point centering countersink according to claim 5, it is characterized in that, the width of described apex point chip area is 3.5 ~ 4mm.
7. the apex point centering countersink according to any one of claim 1-6, it is characterized in that, the front end of described cutter hub is provided with at least one auxiliary-blade group;
Each described auxiliary-blade group comprises the auxiliary-blade that two are distributed in the both sides of described main blade, and the main cutting edge of described auxiliary-blade and the main cutting edge of described cutting portion are in the same plane perpendicular to described cutter hub axis; And the main cutting edge of two described auxiliary-blades of each described auxiliary-blade group is positioned on the straight line of the axes intersect of same and described cutter hub;
The rake face that the front end of described cutter hub corresponds to described auxiliary-blade is provided with secondary chip area.
8. apex point centering countersink according to claim 7, it is characterized in that, the front end of described cutter hub is provided with a described auxiliary-blade group, the main cutting edge of two described auxiliary-blades of this auxiliary-blade group be positioned at same and described cutter hub axes intersect and on straight line perpendicular to described main blade.
9. apex point centering countersink according to claim 7, it is characterized in that, described main blade and auxiliary-blade are fixedly installed on the front end of described cutter hub by the mode of welding.
10. apex point according to claim 7 centering countersink, is characterized in that, described main blade and auxiliary-blade and described cutter hub integrally formed.
CN201410465451.2A 2014-09-12 2014-09-12 Drill point centering countersinking cutter Active CN104227093B (en)

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Publication number Priority date Publication date Assignee Title
CN107790790A (en) * 2017-12-07 2018-03-13 中车洛阳机车有限公司 A kind of anti-countersink of major diameter counterbore for digital control processing
CN108927555A (en) * 2018-09-11 2018-12-04 浙江甬岭数控刀具有限公司 Indexable depth drill
CN111451554A (en) * 2020-05-12 2020-07-28 合肥余塝电子商务有限公司 Positioning device for specifying position of drill bit of electric drill and electric drill
CN113696349A (en) * 2021-08-16 2021-11-26 嘉兴沃尔德金刚石工具有限公司 PCD cutting drill bit and machining method applying same

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US4093395A (en) * 1977-03-14 1978-06-06 Mcdonnell Douglas Corporation Drill and combined drill countersink
US5487627A (en) * 1994-07-26 1996-01-30 Mitsubishi Materials Corporation Counter sink drill
CN2748206Y (en) * 2004-11-17 2005-12-28 哈尔滨量具刃具集团有限责任公司 Combined type counter-boring chamfering bit for intracavity
CN1816408A (en) * 2003-07-03 2006-08-09 山高刀具公司 Tool for chip removing machining with adjustable countersinking drill
CN102873378A (en) * 2012-09-03 2013-01-16 宁波敏宝卫浴五金水暖洁具有限公司 Counter sinking cutter facilitating chip removal
CN102909612A (en) * 2011-07-31 2013-02-06 长城汽车股份有限公司 Method for grinding self-centering drill bit
CN204159944U (en) * 2014-09-12 2015-02-18 广西玉林达业机械配件有限公司 Apex point centering countersink

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093395A (en) * 1977-03-14 1978-06-06 Mcdonnell Douglas Corporation Drill and combined drill countersink
US5487627A (en) * 1994-07-26 1996-01-30 Mitsubishi Materials Corporation Counter sink drill
CN1816408A (en) * 2003-07-03 2006-08-09 山高刀具公司 Tool for chip removing machining with adjustable countersinking drill
CN2748206Y (en) * 2004-11-17 2005-12-28 哈尔滨量具刃具集团有限责任公司 Combined type counter-boring chamfering bit for intracavity
CN102909612A (en) * 2011-07-31 2013-02-06 长城汽车股份有限公司 Method for grinding self-centering drill bit
CN102873378A (en) * 2012-09-03 2013-01-16 宁波敏宝卫浴五金水暖洁具有限公司 Counter sinking cutter facilitating chip removal
CN204159944U (en) * 2014-09-12 2015-02-18 广西玉林达业机械配件有限公司 Apex point centering countersink

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107790790A (en) * 2017-12-07 2018-03-13 中车洛阳机车有限公司 A kind of anti-countersink of major diameter counterbore for digital control processing
CN108927555A (en) * 2018-09-11 2018-12-04 浙江甬岭数控刀具有限公司 Indexable depth drill
CN111451554A (en) * 2020-05-12 2020-07-28 合肥余塝电子商务有限公司 Positioning device for specifying position of drill bit of electric drill and electric drill
CN111451554B (en) * 2020-05-12 2021-06-22 铁鎯电动工具有限公司 Positioning device for specifying position of drill bit of electric drill and electric drill
CN113696349A (en) * 2021-08-16 2021-11-26 嘉兴沃尔德金刚石工具有限公司 PCD cutting drill bit and machining method applying same

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