CN105921798B - For drilling and the way-type drilling unit of aperture Double-side rounding - Google Patents
For drilling and the way-type drilling unit of aperture Double-side rounding Download PDFInfo
- Publication number
- CN105921798B CN105921798B CN201610481960.3A CN201610481960A CN105921798B CN 105921798 B CN105921798 B CN 105921798B CN 201610481960 A CN201610481960 A CN 201610481960A CN 105921798 B CN105921798 B CN 105921798B
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- Prior art keywords
- drilling
- cutter hub
- chamfering
- blade
- head assembly
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/08—Drills combined with tool parts or tools for performing additional working
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2220/00—Details of turning, boring or drilling processes
- B23B2220/08—Deburring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
- B23B2251/241—Cross sections of the diameter of the drill
- B23B2251/245—Variable cross sections
Abstract
The invention discloses a kind of for drilling and the way-type drilling unit of aperture Double-side rounding, including:Cutter hub;Dado head comprising drilling cutter head assembly and at least one set of chamfering cutter head assembly with a default elastic force;Wherein, the front end of cutter hub is arranged in the drilling cutter head assembly, is provided at least one step-like mounting groove on the side lateral wall of the cutter hub;The cutting edge of each chamfering cutter head assembly is arranged in mounting groove engaged therewith in a manner of protruding one predetermined altitude of cutter hub outer surface, and the installation trench bottom that the threshold value of each cutting edge is matched therewith all has a pre-determined distance.The present invention provides a kind of for drilling and the way-type drilling unit of aperture Double-side rounding, it, which is realized, operates the chamfering that cutter can complete drilling and two-sided aperture with one, and for traditional processing method, which shorten working hours, production efficiency is improved, while reducing use cost and labour cost.
Description
Technical field
The present invention relates to a kind of drilling tools used in machining.It is more particularly related to a kind of use
In machining for drilling and the way-type drilling unit of aperture Double-side rounding.
Background technique
Currently when processing work piece, if in the case that work piece needs holes drilled through, and hole two sides all needs chamfering,
Its processing method is generally completed by several processes, be first first drill, then after the completion of drilling above that side chamfering,
Then by workpiece turn-over, and then the chamfering for that side of face of falling down.
And the major defect of Current protocols is:First is that current processing method needs while there is bore cutter and aperture to fall
Two knives of angle knife, cost are excessively high;Second is that needing to process workpiece turn-over, Fei Renye when carrying out chamfering to following aperture
It is time-consuming, reduce production efficiency.
Summary of the invention
It is excellent it is an object of the invention to solve at least the above problems and/or defect, and provide at least to will be described later
Point.
It is a still further object of the present invention to provide a kind of for drilling and the way-type drilling unit of aperture Double-side rounding, by
The front of cutter hub is equipped with drilling cutter head assembly, and to complete to drill through hole operation, position has elasticity equipped with chamfering among cutter hub
The chamfering cutter head assembly of power, to complete the chamfering to the top and bottom of through-hole, effect is to drill through in a process completion
The chamfering in hole and aperture upper and lower surface;It realizes and the chamfering that cutter can complete drilling and two-sided aperture is operated with one, relatively
For traditional processing method, which shorten working hour, production efficiency is improved, while reducing use cost and labour cost.
In order to realize these purposes and other advantages according to the present invention, provide a kind of two-sided for drilling and aperture
The way-type drilling unit at angle, including:
Cutter hub;
Dado head comprising drilling cutter head assembly and at least one set of chamfering cutter head group with a default elastic force
Part;
Wherein, the front end of cutter hub is arranged in the drilling cutter head assembly, is provided with platform on the side lateral wall of the cutter hub
At least one mounting groove of scalariform;
The cutting edge of each chamfering cutter head assembly be arranged in a manner of protruding one predetermined altitude of cutter hub outer surface with
In its mounting groove cooperated, to complete the chamfering operation of hole upper surface to be processed during drilling, and
The installation trench bottom that the threshold value of each cutting edge is matched therewith all has a pre-determined distance, to be added
After the completion of the chamfering operation of work hole upper surface, by the pressure indentation mounting groove of hole wall, and then boring action and to be added is completed
The chamfering of work hole lower surface operates.
Preferably, wherein the cutter hub constitutes one in cutter hub front end by a curved transition sections with cutter hub axis
Line is the contraction flow region in the center of circle, to be defined by the curved transition sections to hole depth.
Preferably, wherein the chamfering cutter head assembly is set with the removably that itself and cutter hub front end distance is adjusted
It sets in mounting groove, and then adapts to different drilling depths.
Preferably, wherein the cutter hub, which is internally provided with, respectively leads to drilling cutter head assembly and chamfering cutter head assembly
The cooling duct of each installation place, and helical flute is also relatively set on the lateral wall of the cutter hub.
Preferably, wherein the drilling cutter head assembly includes first blade for crossing cutter hub center, and is arranged in knife
Second blade of body front end outer side.
Preferably, wherein each chamfering cutter head assembly includes a fixing piece, and the front end of each fixing piece is all provided with
It is equipped with the third blade for chamfering, each third blade is all set to two cutting edges being oppositely arranged,
And the cutting edge all has a predetermined inclination angle, to complete the chamfering operation of upper and lower surface.
Preferably, wherein preceding chamfered groove, and the outer rim setting of the third blade are offered on each third blade
There is a curved portion.
Preferably, wherein the fixing piece passes through the step that a cover board is removeably positioned at mounting groove
On, the fixing piece has a rake being pressed into convenient for third blade in the installation end bottom of third blade.
Preferably, wherein the fixing piece is arranged to spring steel, and its spring rate is arranged to 500-700N,
The length of the fixing piece is arranged to 40-90mm, and the thickness of the fixing piece is arranged to 2-3.5mm, the third blade
Height be arranged to 3-5.5mm, the groove depth of the one end of the mounting groove to accommodate third blade is arranged to 5-9mmm, institute
The predetermined altitude for stating the prominent cutter hub outer surface of cutting edge is arranged to 1.5mm-3mm.
Preferably, wherein the fixing piece is arranged to spring steel, and its spring rate is arranged to 630N, described
The length of fixing piece is arranged to 80mm, and the thickness of the fixing piece is arranged to 3mm, and the height of the third blade is set
For 4.5mm, the groove depth of the one end of the mounting groove to accommodate third blade is arranged to 4.5mmm, the prominent knife of the cutting edge
The predetermined altitude of external surface is arranged to 2mm.
The present invention is include at least the following beneficial effects:First, the present invention is by being equipped with drilling cutter head group in the front of cutter hub
Part, to complete to drill through hole operation, position is equipped with the chamfering cutter head assembly with elastic force of chamfering among cutter hub, with completion pair
The chamfering of the top and bottom of through-hole, effect is can be in the chamfering of process completion a holes drilled through and aperture upper and lower surface;It is real
Show and the chamfering that cutter can complete drilling and two-sided aperture has been operated with one, for traditional processing method, contracting
In short working hour, production efficiency is improved, while reducing use cost and labour cost, has implementable effect good, operability
By force, high production efficiency, the controllable effect of cost.
Second, the present invention is designed by the mounting groove of unique texture, realize when installing chamfering cutter head assembly, so that peace
Dress chamfering cutter head protrudes from contraction flow region in addition to third blade, in being partly respectively positioned in mounting groove, and provides one and accommodates third knife
Piece and the cavity of fixing piece one end, the fixing piece of chamfering cutter head assembly are made of spring steel, to be supplied to third blade one
Elastic anchorage force, while being taken in mounting groove convenient for its chamfering and when hole wall transmits pressure, realize that it is threaded through under completion
Orifice chamfer operation, has implementable effect good, the effect of strong operability.
Third, the present invention is better in order to have while guaranteeing the stability and exploitativeness of drilling and chamfering operation
Chamfering cutter head assembly is configured by adaptability in a manner of it can adjust to drilling cutter head side, and to each of chamfering cutter head assembly
Parameters of operating part is arranged, so that it adapts to the drilling that hole depth is 10mm-60mm and chamfering operation, it is adaptable good,
Stability is good, the effect of strong operability.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is in one embodiment of the present of invention for drilling and the plan structure of the way-type drilling unit of aperture Double-side rounding is shown
It is intended to;
Fig. 2 is in another embodiment of the invention for drilling and the front view structure of the way-type drilling unit of aperture Double-side rounding
Schematic diagram;
Fig. 3 is in another embodiment of the invention for drilling and the left view structure of the way-type drilling unit of aperture Double-side rounding
Schematic diagram;
Fig. 4 is the A-A schematic cross-sectional view in Fig. 3;
Fig. 5 is P in Fig. 3 to structural schematic diagram;
Fig. 6 be another embodiment of the invention in for drill and the way-type drilling unit of aperture Double-side rounding in chamfering cutter head
The schematic view of the front view of component;
Fig. 7 be another embodiment of the invention in for drill and the way-type drilling unit of aperture Double-side rounding in chamfering cutter head
The left view structural representation of component;
Fig. 8 be another embodiment of the invention in for drill and the way-type drilling unit of aperture Double-side rounding in chamfering cutter head
The overlooking structure diagram of component.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
Fig. 1,4 show it is according to the present invention a kind of for drilling and the realization shape of the way-type drilling unit of aperture Double-side rounding
Formula, including:
Cutter hub 1;
Dado head 2 comprising drilling cutter head assembly 210 and at least one set of chamfering cutter head with a default elastic force
Component 220;
Cutter hub comprising cutter hub 1 and cutter head 2, the cutter head include drilling cutter head assembly 210 and have one to preset elasticity
At least one set of chamfering cutter head assembly 220 of power, equipped with the chamfering cutter head group with elastic force in the outer circle of position among the cutter hub
Part is formed by the third blade unit of the fixing piece with elastic force and the alloy material being welded on front side of it;
Wherein, the front end of cutter hub is arranged in the drilling cutter head assembly, to be used for drilling operation, outside the side of the cutter hub
It is provided at least one step-like mounting groove 11 on side wall, is used to provide a space to accommodate chamfering cutter head assembly, in turn
The chamfering operation that hole carries out lower aperture can be passed through by making it in process;
The cutting edge of each chamfering cutter head assembly be arranged in a manner of protruding one predetermined altitude of cutter hub outer surface with
In its mounting groove cooperated, to complete the chamfering operation of hole upper surface to be processed during drilling, and
The installation trench bottom that the threshold value of each cutting edge is matched therewith all has a pre-determined distance, to be added
After the completion of the chamfering operation of work hole upper surface, by the pressure indentation mounting groove of hole wall, and then boring action and to be added is completed
The chamfering of work hole lower surface operates.Using this scheme by, equipped with drilling cutter head assembly, being drilled through in the front of cutter hub with completion
Hole operation, cutter hub centre position is equipped with the chamfering cutter head assembly with elastic force of chamfering, to complete the top and bottom to through-hole
Chamfering, effect is that the chamfering of holes drilled through and aperture upper and lower surface can be completed in process;It realizes with one knife
Tool can complete drilling and the chamfering operation in two-sided aperture, and for traditional processing method, which shorten working hours, improve
Production efficiency, while use cost and labour cost are reduced, have implementable effect good, strong operability, high production efficiency,
The controllable benefit of cost.Also, this mode is a kind of explanation of preferred embodiments, and however, it is not limited to this.Implementing
When of the invention, replacement and replacement appropriate can be carried out according to user's demand.
As shown in figure 4, the cutter hub is made up of a curved transition sections 12 in cutter hub front end in another example
One using cutter hub central axes as the contraction flow region 13 in the center of circle, to be defined by the curved transition sections to hole depth.Using this side
Case is defined by the depth of curved transition sections device to hole, has the effect of strong operability, while relative to traditional both ends
For equally big cutter hub, the benefit with stronger product structure stability.Also, this mode be it is a kind of compared with
The explanation of good example, however, it is not limited to this.In carrying out the present invention, can according to user's demand carry out it is appropriate replacement and
Replacement.
In another example, the chamfering cutter head assembly is set with the removably that itself and cutter hub front end distance is adjusted
It sets in mounting groove, and then adapts to different drilling depths.It is logical by the way that one is arranged on fixing piece and cover board using this scheme
Slot, and then different hole depths is adapted at a distance from cutter hub front end by adjusting third blade, have implementable effect good, can operate
Strong, the good benefit of adaptability of property.Also, this mode is a kind of explanation of preferred embodiments, and however, it is not limited to this.?
When implementing the present invention, replacement and replacement appropriate can be carried out according to user's demand.
As shown in Figs 1-4, in another example, the cutter hub, which is internally provided with, to be respectively led to drilling cutter head assembly and falls
The cooling duct 14 of each installation place of angle cutter head assembly, the design of cutter hub center have internal cooling hole, and cooling hole exits are directly right
Quasi- blade reduces damage of the heat caused by cutting to cutter hub, and spiral row is also relatively set on the lateral wall of the cutter hub
It considers slot 15 to be worth doing, is provided with helical flute on front side of cutter hub, chip removal is unobstructed, avoids iron filings damage cutter hub and blade.Using this scheme
Good, the strong operability with implementable effect, the good benefit of stability.Also, this mode is a kind of preferred embodiments
Explanation, however, it is not limited to this.In carrying out the present invention, replacement and replacement appropriate can be carried out according to user's demand.
As shown in Figure 1, the drilling cutter head assembly includes first blade for crossing cutter hub center in another example
211, and the second blade 212 of cutter hub front end outer side is set.Using this scheme by filling two drillings in front of cutter hub
Blade, first blade cross center, and second blade is arranged on the outside according to pore diameter size, and each blade passes through screw
213 are pressed in the insert groove on cutter hub, with good, the high in machining efficiency benefit of drilling effect.Also, this mode is only
It is a kind of explanation of preferred embodiments, however, it is not limited to this.In carrying out the present invention, it is appropriate to be carried out according to user's demand
Replacement and replacement.
As Figure 4-Figure 6, in another example, each chamfering cutter head assembly includes a fixing piece 221, is used for
It plays a supportive role to third blade, and has a spring rate to be smoothly pressed into mounting groove during processing chamfering, respectively
The front end of the fixing piece is provided with the third blade 222 for chamfering, and each third blade is all set to have
There are two cutting edges 223 being oppositely arranged, be used to operate upper and lower aperture, and the cutting edge all has one and presets and inclines
Rake angle, to complete the chamfering operation of upper and lower surface.Have implementable effect good using this scheme, strong operability is stablized
The good benefit of property.Also, this mode is a kind of explanation of preferred embodiments, and however, it is not limited to this.Implementing this hair
When bright, replacement and replacement appropriate can be carried out according to user's demand.
As shown in fig. 6, in another example, chamfered groove 224 before being offered on each third blade, and the third
The outer rim of blade is provided with a curved portion 225.Chamfered groove before being opened up on third blade using this scheme, so that chamfering is lighter
Fastly, finish is good, and circular arc is arranged in the outer circle of third blade, scrapes hole wall for avoiding, influences Hole Wall Roughness, have
Machining accuracy is high, and stability is good, the good benefit of implementable effect.Also, this mode is a kind of saying for preferred embodiments
Bright, however, it is not limited to this.In carrying out the present invention, replacement and replacement appropriate can be carried out according to user's demand.
As shown in figure 4, the fixing piece passes through a cover board 226 and is removably arranged in another example
On the step of mounting groove, the fixing piece has an inclination being pressed into convenient for third blade in the installation end bottom of third blade
Portion 227.Using the fixing piece in this scheme in fixed third blade, outside is equipped with a cover board, with fixing piece one
It rises and is pressed on cutter hub in corresponding mounting groove by screw 228.The effect of cover board is to avoid fixing piece production when being cut
Raw biggish external force, caused by turn up and happen, and handle 3 is scabbled in the side that national standard is provided on rear side of cutter hub, general
Property it is strong, have implementable effect good, stability is strong, cutting smoothly benefit.Also, this mode is a kind of preferable reality
The explanation of example, however, it is not limited to this.In carrying out the present invention, can according to user's demand carry out it is appropriate replacement and more
It changes.
In another example, the fixing piece is arranged to spring steel, and its spring rate is arranged to 500-700N,
The length of the fixing piece is arranged to 40-90mm, and the thickness of the fixing piece is arranged to 2-3.5mm, the third blade
Height be arranged to 3-5.5mm, the groove depth of the one end of the mounting groove to accommodate third blade is arranged to 5-9mmm, institute
The predetermined altitude for stating the prominent cutter hub outer surface of cutting edge is arranged to 1.5mm-3mm.It is since fixing piece can using this scheme
It is adjusted along predetermined direction, to adapt to the process operation in different depth hole, but if the length of fixing piece is too long, major part
It is suspended, in chamfering operation, the stability of third blade is with regard to inadequate, and then influences the machining accuracy of product, and in order to guarantee
Stability in third blade process, it is just very high to the spring rate requirement of fixing piece, but if spring rate is excessively high,
It cannot successfully be pressed into mounting groove in process, can not be normally carried out chamfering operation, consolidate invention and pass through
A large amount of experiment and creative labor configure each parameter of fixing piece, third blade, installation groove depth, so that
It completes drilling and chamfering operation in the range of adapting to a wide range of such as hole depth 10mm-60mm as far as possible, has implementable effect
It is good, strong operability, adaptable benefit.Also, this mode is a kind of explanation of preferred embodiments, but not office
It is limited to this.In carrying out the present invention, replacement and replacement appropriate can be carried out according to user's demand.
In another example, the fixing piece is arranged to spring steel, and its spring rate is arranged to 630N, described
The length of fixing piece is arranged to 80mm, and the thickness of the fixing piece is arranged to 3mm, and the height of the third blade is set
For 4.5mm, the groove depth of the one end of the mounting groove to accommodate third blade is arranged to 4.5mmm, the prominent knife of the cutting edge
The predetermined altitude of external surface is arranged to 2mm.It is one of optimal embodiment using this scheme, to adapt to hole
The drilling and chamfer machining operation that depth is 35mm-50mm, have implementable effect good, the benefit of strong operability.Also,
This mode is a kind of explanation of preferred embodiments, and however, it is not limited to this.It in carrying out the present invention, can be according to user's need
It asks and carries out replacement and replacement appropriate.
Implementation method:
Drilling tool positive direction feed, firstly, by drilling the first blade and the second blade, hole is drilled through or is pierced to
In the material of processing;Secondly, continue positive direction feed, at this moment, third blade close to first blade one end cutting edge by device to hole
Upside aperture carries out chamfering operation, and with the continuation feed of cutter, third blade completes the chamfering to upper-side hole, simultaneously because the
Three blades are when entering certain depth, the design of oblique cutting edge, so that third blade is forced to receive hole wall transmitting
Pressure, and then be gradually compressed in hole during chamfering, there is circular arc i.e. additionally, due to design on third blade outer edge
Curved portion, and its in hole when, can be effectively prevented from third blade and scratch hole wall, and follow in hole along with the rotation of cutter
Rotation;Again, continue feed by so that third blade pops up, at this moment stopping positive direction feed, to negative side on the downside of workpiece
To feed, cutting edge starts to carry out chamfering to downside aperture on rear side of the first blade, and after downside chamfering is complete, and is compressed to
In hole, and then cutter is exited, completes drilling and the operation of upper and lower two sides orifice chamfer.
Number of devices and treatment scale described herein are for simplifying explanation of the invention.To of the invention for boring
The application of the way-type drilling unit of hole and aperture Double-side rounding, modifications and variations are apparent to one skilled in the art
's.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With.It can be applied to the practical field of various suitable sheets completely.It for those skilled in the art, can be easily
Realize other modification.Therefore without departing from the general concept defined in the claims and the equivalent scope, this is practical and unlimited
In specific details and legend shown and described herein.
Claims (5)
1. a kind of for drilling and the way-type drilling unit of aperture Double-side rounding, which is characterized in that including:
Cutter hub;
Dado head comprising drilling cutter head assembly and at least one set of chamfering cutter head assembly with a default elastic force;
Wherein, the front end of cutter hub is arranged in the drilling cutter head assembly, is provided on the side lateral wall of the cutter hub step-like
At least one mounting groove;
The cutting edge of each chamfering cutter head assembly is arranged in a manner of protruding one predetermined altitude of cutter hub outer surface matches with it
In the mounting groove of conjunction, to complete the chamfering operation of hole upper surface to be processed during drilling, and
The installation trench bottom that the threshold value of each cutting edge is matched therewith all has a pre-determined distance, in hole to be processed
After the completion of the chamfering operation of upper surface, it is pressed into mounting groove by the pressure of hole wall, and then complete boring action and hole to be processed
The chamfering of lower surface operates;
Each chamfering cutter head assembly includes a fixing piece, and the front end of each fixing piece is provided with one for chamfering
Third blade, each third blade is all set to two cutting edges being oppositely arranged, and the cutting edge all has
One predetermined inclination angle, to complete the chamfering operation of upper and lower surface;
Preceding chamfered groove is offered on each third blade, and the outer rim of the third blade is provided with a curved portion;
The fixing piece passes through a cover board and is removeably positioned on the step of mounting groove, and the fixing piece is in third
The installation end bottom of blade has a rake being pressed into convenient for third blade;
The fixing piece is arranged to spring steel, and its spring rate is arranged to 500-700N, the length quilt of the fixing piece
It is set as 40-90mm, the thickness of the fixing piece is arranged to 2-3.5mm, and the height of the third blade is arranged to 3-
5.5mm, the groove depth of the one end of the mounting groove to accommodate third blade are arranged to 5-9mm, the prominent cutter hub of the cutting edge
The predetermined altitude of outer surface is arranged to 1.5mm-3mm;The cutter hub is made up of a curved transition sections in cutter hub front end
One using cutter hub central axes as the contraction flow region in the center of circle, to be defined by the curved transition sections to hole depth.
2. as described in claim 1 for drilling and the way-type drilling unit of aperture Double-side rounding, which is characterized in that the rose reamer
Head assembly is arranged in mounting groove with the removably that itself and cutter hub front end distance is adjusted, and then it is deep to adapt to different drilling
Degree.
3. as described in claim 1 for drilling and the way-type drilling unit of aperture Double-side rounding, which is characterized in that in the cutter hub
Portion is provided with the cooling duct for respectively leading to each installation place of drilling cutter head assembly and chamfering cutter head assembly, and the cutter hub is outer
Helical flute is also relatively set on side wall.
4. as described in claim 1 for drilling and the way-type drilling unit of aperture Double-side rounding, which is characterized in that the bore cutter
Head assembly includes first blade at a mistake cutter hub center, and the second blade of cutter hub front end outer side is arranged in.
5. as described in claim 1 for drilling and the way-type drilling unit of aperture Double-side rounding, which is characterized in that the fixing piece
It is arranged to spring steel, and its spring rate is arranged to 630N, the length of the fixing piece is arranged to 80mm, the fixation
The thickness of part is arranged to 3mm, and the height of the third blade is arranged to 4.5mm, and the mounting groove is to accommodate third knife
The groove depth of one end of piece is arranged to 7mmm, and the predetermined altitude of the prominent cutter hub outer surface of the cutting edge is arranged to 2mm.
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CN201610481960.3A CN105921798B (en) | 2016-06-24 | 2016-06-24 | For drilling and the way-type drilling unit of aperture Double-side rounding |
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Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106694917B (en) * | 2016-12-20 | 2018-11-06 | 绵阳市绵工工具有限公司 | Suitable for bore hole and the gang tool of two sides orifice chamfer |
CN107716963A (en) * | 2017-11-21 | 2018-02-23 | 绵阳市绵工工具有限公司 | A kind of two-way chamfering tool |
CN110497029B (en) * | 2019-07-31 | 2020-07-24 | 中国航发南方工业有限公司 | Positive and negative chamfering device and positive and negative orifice chamfering processing method of through hole |
CN112620739A (en) * | 2020-12-17 | 2021-04-09 | 攀钢集团攀枝花钢钒有限公司 | Drilling tool for steel rail bolt hole |
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CN103121121A (en) * | 2013-02-28 | 2013-05-29 | 常州东风农机集团有限公司 | Indexable drilling bore chamfer compound cutter |
CN105458356A (en) * | 2016-01-14 | 2016-04-06 | 广州小出钢管有限公司 | Drilling and double-side chamfering combined tool |
CN205733159U (en) * | 2016-06-24 | 2016-11-30 | 绵阳市绵工工具有限公司 | For boring and the way-type drilling unit of aperture Double-side rounding |
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