CN108526554A - Preceding chip dividing groove bores - Google Patents
Preceding chip dividing groove bores Download PDFInfo
- Publication number
- CN108526554A CN108526554A CN201810745734.0A CN201810745734A CN108526554A CN 108526554 A CN108526554 A CN 108526554A CN 201810745734 A CN201810745734 A CN 201810745734A CN 108526554 A CN108526554 A CN 108526554A
- Authority
- CN
- China
- Prior art keywords
- drill bit
- dividing groove
- cutting
- chip dividing
- helicla flute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- 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
- B23B2251/00—Details of tools for drilling machines
- B23B2251/40—Flutes, i.e. chip conveying grooves
Abstract
The invention discloses preceding chip dividing groove brills, including drill bit, one end of the drill bit is provided with drill bit fixed handle, and the drill bit fixed handle and drill bit are an integral structure, and the other end of the drill bit is provided with drill core point, the drill core point is the top of drill bit one end, one end of the drill bit is provided with chisel edge, and the drill core point is fixed on one end of chisel edge, and one end of the chisel edge is provided with cutting edge, the junction of the chisel edge and cutting edge is provided with chisel edge turning point, and one end of the drill bit is provided with helicla flute；Using chip dividing groove, the length of cut of cutting edge is reduced, the contact area of cutting edge and cutting members is reduced, reduces the friction of cutting edge and cutting members, reduce the residual stress in cutting process, the service life of cutting edge is improved, while increasing the scattered degree of clast, avoids clast is excessive cutting members is caused to be burst apart, improve the precision of drilling, the production efficiency for improving drilling, using fuel reserve tank and oil guide pipe so that cutting breast is entered by oil guide pipe in fuel tap pipe.
Description
Technical field
The invention belongs to drilling device technical fields, and in particular to preceding chip dividing groove bores.
Background technology
Drill bit is the chief component of drilling device, and drill bit rotates under the drive of machinery, and drill bit rotates, to
It drives entire drill bit to generate centripetal movement, and cuts by invading, grind and make cutting members generation slight crack and be crushed, play and drill downwards
Effect.Drill bit is one of main drilling device, and according to the difference of working environment, territorial environment, specification, the shape of drill bit are also answered
When different, when carrying out hole work, should reasonably, scientifically be selected specifically to need, according to specific design scheme
Drill bit.Science selection drill bit, rationally determining bore liquid in specific boring work, to improve working efficiency, the work of drilling
Make quality.During use, cutting clast generates prodigious stress to existing drill bit, increases the loss of drill bit, reduces and bores
The service life of head increases the number of bit change-over, reduces production efficiency, while improving the economic cost of drilling, while drill bit
During use, it needs ceaselessly to increase cutting fluid, while cutting fluid, in initial drilling, the cutting fluid overwhelming majority wastes
Fall so that cutting fluid cannot preferably be attached to the surface of drill bit, while after drilling, a small amount of cutting fluid be needed to make drill bit
The problem of being detached with drilling, thus it is proposed that preceding chip dividing groove bores.
Invention content
The purpose of the present invention is to provide preceding chip dividing groove brill, used with solving drill bit mentioned above in the background art
In the process, cutting clast generates prodigious stress, increases the loss of drill bit, reduces the service life of drill bit, increases bit change-over
Number, reduce production efficiency, while improving the economic cost of drilling, while drill bit is during use, needs ceaselessly
Increase cutting fluid, while cutting fluid, in initial drilling, the cutting fluid overwhelming majority slatterns so that cutting fluid cannot be preferably attached
The problem of on the surface of drill bit, while after drilling, needing a small amount of cutting fluid that drill bit is made to be detached with drilling.
To achieve the above object, the present invention provides the following technical solutions：Preceding chip dividing groove bores, including drill bit, the drill bit
One end is provided with drill bit fixed handle, and the drill bit fixed handle and drill bit are an integral structure, and the other end of the drill bit is provided with
Drill core point, the drill core point are the top of drill bit one end, and one end of the drill bit is provided with chisel edge, and the drill core point is fixed on cross
One end of sword, one end of the chisel edge are provided with cutting edge, and the junction of the chisel edge and cutting edge is provided with chisel edge turning point, institute
The one end for stating drill bit is provided with helicla flute, and the surface of the helicla flute is provided with chip dividing groove, and the chip dividing groove is fixed on helicla flute
Surface and extend to one end of cutting edge, the side of the helicla flute is provided with first flank, after the oil outlet and first
Face is connected by cutting edge, and one end of the helicla flute is provided with Hou Gouleng, and the rear ditch rib is fixed on the edge of helicla flute,
The side of the helicla flute is provided with second flank, and the second flank is connect with helicla flute by rear ditch rib, the helicla flute
Surface be provided with oil outlet, the drill bit is internally provided with fuel reserve tank, and the surface of the fuel reserve tank is provided with pouring orifice, institute
One end of pouring orifice is stated through the surface of drill bit and is embedded into the inside of fuel reserve tank, one end of the fuel reserve tank is provided with Oil Guide
Pipe, one end of the oil guide pipe lead the inside of fuel reserve tank through the surface of fuel reserve tank and insertion, and the other end of the oil guide pipe is set
It is equipped with fuel tap pipe, the fuel tap pipe is internally provided with piston ball, and the surface of the piston ball is provided with piston rod, the piston
One end of bar is fixed on the surface of piston ball, and the other end of the piston rod is fixed on the inside of fuel tap pipe.
Preferably, there are two the cutting edge settings, two cutting edges are about drill core point central symmetry.
Preferably, the chip dividing groove is cambered surface strip structure.
Preferably, the preceding chip dividing groove bores, it is characterised in that：The oil guide pipe and fuel tap pipe are cylinder structure, and
Fuel tap pipe is vertically fixed on the surface of oil guide pipe one end.
Preferably, there are two the oil outlet settings, two oil outlets are in a center of symmetry about drill core point.
Preferably, the oil outlet runs through the surface of helicla flute and is embedded into the inside of fuel tap pipe, and oil outlet is fixed on
The same side of oil guide pipe and piston ball.
Preferably, the outside of the piston rod is spring, and the inside of the piston rod is hydraulic telescopic rod.
Compared with prior art, the beneficial effects of the invention are as follows：Using chip dividing groove, the length of cut of cutting edge is reduced, is dropped
The contact area of low cutting edge and cutting members reduces the friction of cutting edge and cutting members, reduces the residual stress in cutting process,
The service life of cutting edge is improved, while increasing the scattered degree of clast, avoids clast is excessive cutting members is caused to be burst apart, improves and bores
The precision in hole improves the production efficiency of drilling, using fuel reserve tank and oil guide pipe so that cutting breast enters fuel tap by oil guide pipe
In pipe, by bit so that piston ball deviates so that cutting breast is exported by going out by mouth so that cutting breast touches drill bit table
Face improves the convenience that cutting breast uses, avoids cutting breast from largely using caused waste, using piston rod, piston ball passes through
Piston rod telescopic moving so that piston ball the moving stability increases, and improves the stability of cutting breast release, avoids cutting breast
Waste.
Description of the drawings
Fig. 1 is the drill bit structure schematic diagram of the present invention；
Fig. 2 is the drill bit head enlarged structure schematic diagram of the present invention；
Fig. 3 is the drill bit side view of the present invention；
Fig. 4 is the drill bit sectional view of the present invention；
Fig. 5 is the oil guide pipe and fuel tap pipe structural schematic diagram of the present invention；
In figure：After 1- drill bits, 2- drill bits fixed handle, 3- drill cores point, 4- chisel edges, 5- cutting edges, 6- chip dividing grooves, 7- first
Ditch rib, 10- helicla flutes, 11- oil outlets, 12- fuel reserve tanks, 13- oil guide pipes, 14- fuel taps pipe, 15- after face, 8- second flanks, 9-
Piston ball, 16- piston rods.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the present invention provides a kind of technical solution：Preceding chip dividing groove bores, including drill bit
1, one end of drill bit 1 is provided with drill bit fixed handle 2, and drill bit fixed handle 2 and drill bit 1 are an integral structure, and the other end of drill bit 1 is set
It is equipped with drill core point 3, drill core point 3 is the top of 1 one end of drill bit, and one end of drill bit 1 is provided with chisel edge 4, and drill core point 3 is fixed on chisel edge
4 one end, one end of chisel edge 4 are provided with cutting edge 5, and the junction of chisel edge 4 and cutting edge 5 is provided with chisel edge turning point, drill bit 1
One end is provided with helicla flute 10, and the surface of helicla flute 10 is provided with chip dividing groove 6, and chip dividing groove 6 is fixed on the surface of helicla flute 10 simultaneously
One end of cutting edge 5 is extended to, the side of helicla flute 10 is provided with first flank 7, and oil outlet 11 passes through cutting with first flank 7
Sword 5 connects, and one end of helicla flute 10 is provided with rear ditch rib 9, and rear ditch rib 9 is fixed on the edge of helicla flute 10, helicla flute 10
Side is provided with second flank 8, and second flank 8 is connect with helicla flute 10 by rear ditch rib 9, and the surface of helicla flute 10 is provided with out
Oilhole 11, drill bit 1 are internally provided with fuel reserve tank 12, and the surface of fuel reserve tank 12 is provided with pouring orifice, and one end of pouring orifice is run through
One end of the surface of drill bit 1 and the inside for being embedded into fuel reserve tank 12, fuel reserve tank 12 is provided with oil guide pipe 13, one end of oil guide pipe 13
The surface of fuel reserve tank 12 and the embedded inside for leading fuel reserve tank 12, the other end of oil guide pipe 13 are provided with fuel tap pipe 14, fuel tap
Pipe 14 is internally provided with piston ball 15, and the surface of piston ball 15 is provided with piston rod 16, and one end of piston rod 16 is fixed on work
The surface of ball 15 is filled in, the other end of piston rod 16 is fixed on the inside of fuel tap pipe 14.
In order to increase the stability of cutting, the convenience of cutting members processing is improved, in the present embodiment, it is preferred that cutting edge 5
There are two settings, and two cutting edges 5 are about sharp 3 central symmetries of drill core.
In order to improve the discharge of clast in cutting members process, the influence of the cutting of clast is reduced, it is excellent in the present embodiment
Choosing, chip dividing groove 6 is cambered surface strip structure.
It in order to improve the oil storage capacity of drill bit 1, improves and cuts the convenience that breast discharges, in the present embodiment, it is preferred that Oil Guide
Pipe 13 and fuel tap pipe 14 are cylinder structure, and fuel tap pipe 14 is vertically fixed on the surface of 13 one end of oil guide pipe.
In order to make cutting breast be attached to bit face, reduces to drill and cut the use of breast early period, in the present embodiment, preferably
, there are two the settings of oil outlet 11, and two oil outlets 11 are in a center of symmetry about drill core point 3.
It in order to improve the degree of flexibility of cutting breast discharge, improves and cuts stability derived from breast, in the present embodiment, preferably
, oil outlet 11 runs through the surface of helicla flute 10 and is embedded into the inside of fuel tap pipe 14, and oil outlet 11 is fixed on oil guide pipe 13
With the same side of piston ball 15.
In order to increase the stability of the movement of piston ball 15, in the present embodiment, it is preferred that the outside of piston rod 16 is spring,
The inside of piston rod 16 is hydraulic telescopic rod.
The operation principle and process for using of the present invention：Drill bit 1 in use, the filling oil cover on 12 surface of fuel reserve tank is opened,
Cutting breast appropriate is injected in the inside of fuel reserve tank 12, and filling oil cover is twisted, and drill bit 1 is fixed on brill rifle by drill bit fixed handle 2
One end, 3 alignment of the drill core of 1 one end of drill bit point is needed at the center that drills at this time, starts and bores rifle, drill bit 1 is by turning at this time
It is dynamic so that the compression piston bar 16 under the influence of centrifugal force of piston ball 15, and make piston ball 15 close to oil outlet 11, when fuel-displaced
When hole 11 is in the centre of piston ball 15 and oil guide pipe 13, the cutting breast inside fuel reserve tank 12 passes through oil guide pipe 13 and fuel tap pipe 14
It exporting by oil outlet 11, and makes cutting breast contact cutting plate and chisel edge, chisel edge 4 cuts a certain size cutting plate hole first, and
So that cutting edge 5 is contacted with cutting plate, cutting plate under the action of drill core point 3, chisel edge 4 and cutting edge 5 at brill certain depth and
The hole of size, clast slowly rises under the action of helicla flute 10 at this time, and is detached from cutting hole, while chip dividing groove 6 makes cutting
5 cutting output of sword is reduced.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. chip dividing groove bores before, including drill bit (1), it is characterised in that：One end of the drill bit (1) is provided with drill bit fixed handle (2),
The drill bit fixed handle (2) and drill bit (1) are an integral structure, and the other end of the drill bit (1) is provided with drill core point (3), institute
It is the top of drill bit (1) one end to state drill core sharp (3), and one end of the drill bit (1) is provided with chisel edge (4), and the drill core sharp (3) is solid
It is scheduled on one end of chisel edge (4), one end of the chisel edge (4) is provided with cutting edge (5), the company of the chisel edge (4) and cutting edge (5)
The place of connecing is provided with chisel edge turning point, and one end of the drill bit (1) is provided with helicla flute (10), the surface setting of the helicla flute (10)
There are chip dividing groove (6), the chip dividing groove (6) to be fixed on the surface of helicla flute (10) and extend to one end of cutting edge (5), the spiral shell
The side of spin slot (10) is provided with first flank (7), and the oil outlet (11) is connect with first flank (7) by cutting edge (5),
One end of the helicla flute (10) is provided with Hou Gouleng (9), and the rear ditch rib (9) is fixed on the edge of helicla flute (10), institute
The side for stating helicla flute (10) is provided with second flank (8), and the second flank (8) passes through rear ditch rib (9) with helicla flute (10)
Connection, the surface of the helicla flute (10) are provided with oil outlet (11), and the drill bit (1) is internally provided with fuel reserve tank (12),
The surface of the fuel reserve tank (12) is provided with pouring orifice, and one end of the pouring orifice through the surface of drill bit (1) and is embedded into storage
One end of the inside of fuel tank (12), the fuel reserve tank (12) is provided with oil guide pipe (13), and one end of the oil guide pipe (13) is run through
The surface of fuel reserve tank (12) is simultaneously embedded in the inside for leading fuel reserve tank (12), and the other end of the oil guide pipe (13) is provided with fuel tap pipe
(14), the fuel tap pipe (14) is internally provided with piston ball (15), and the surface of the piston ball (15) is provided with piston rod
(16), one end of the piston rod (16) is fixed on the surface of piston ball (15), and the other end of the piston rod (16) is fixed on
The inside of fuel tap pipe (14).
2. preceding chip dividing groove according to claim 1 bores, it is characterised in that：There are two cutting edge (5) settings, two institutes
Cutting edge (5) is stated about sharp (3) central symmetry of drill core.
3. preceding chip dividing groove according to claim 1 bores, it is characterised in that：The chip dividing groove (6) is cambered surface strip structure.
4. preceding chip dividing groove according to claim 1 bores, it is characterised in that：The oil guide pipe (13) and fuel tap pipe (14) are
Cylinder structure, and fuel tap pipe (14) is vertically fixed on the surface of oil guide pipe (13) one end.
5. preceding chip dividing groove according to claim 1 bores, it is characterised in that：There are two oil outlet (11) settings, two
The oil outlet (11) is in a center of symmetry about drill core sharp (3).
6. preceding chip dividing groove according to claim 1 bores, it is characterised in that：The oil outlet (11) is through helicla flute (10)
Surface and the inside for being embedded into fuel tap pipe (14), and oil outlet (11) is fixed on the same of oil guide pipe (13) and piston ball (15)
Side.
7. preceding chip dividing groove according to claim 1 bores, it is characterised in that：The outside of the piston rod (16) is spring, institute
The inside for stating piston rod (16) is hydraulic telescopic rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745734.0A CN108526554B (en) | 2018-07-09 | 2018-07-09 | Front chip dividing groove drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745734.0A CN108526554B (en) | 2018-07-09 | 2018-07-09 | Front chip dividing groove drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108526554A true CN108526554A (en) | 2018-09-14 |
| CN108526554B CN108526554B (en) | 2023-09-15 |
Family
ID=63487860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810745734.0A Active CN108526554B (en) | 2018-07-09 | 2018-07-09 | Front chip dividing groove drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108526554B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110497027A (en) * | 2019-08-31 | 2019-11-26 | 厦门曦哲贸易有限公司 | A kind of outer diameter adjustable reamer based on spiral fluted disc |
| EP4197677A1 (en) * | 2021-12-15 | 2023-06-21 | AB Sandvik Coromant | Drill with improved chip evacuation |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511120A (en) * | 1965-12-29 | 1970-05-12 | Bbc Brown Boveri & Cie | Gun drill |
| KR19980068751A (en) * | 1997-02-24 | 1998-10-26 | 양수제 | Brazed twist drill |
| CN201534235U (en) * | 2009-08-07 | 2010-07-28 | 上海惠而顺精密工具有限公司 | Integral hard-alloy printed circuit board drill |
| CN102350520A (en) * | 2011-09-21 | 2012-02-15 | 广东工业大学 | Printed circuit board symmetrical drill with double chip dividing grooves |
| CN102441695A (en) * | 2010-09-30 | 2012-05-09 | 苏州春兴精工股份有限公司 | Diamond cutter for processing deep hole |
| CN203343497U (en) * | 2013-06-09 | 2013-12-18 | 常州吉瑞刀具技术有限公司 | High-speed deep-hole twist drill |
| CN103737075A (en) * | 2013-11-26 | 2014-04-23 | 苏州道众机械制造有限公司 | Liquid cooling drill bit |
| CN204018808U (en) * | 2014-08-14 | 2014-12-17 | 武汉泰尔斯刀具有限公司 | A kind of drill bit for deep hole processing |
| CN204108412U (en) * | 2014-09-23 | 2015-01-21 | 浙江北工工具有限公司 | A kind of heat-resisting break-proof drill |
| CN104416194A (en) * | 2013-08-28 | 2015-03-18 | 天工爱和特钢有限公司 | Chip separation drill |
| CN104533588A (en) * | 2014-12-26 | 2015-04-22 | 山东华源莱动内燃机有限公司 | Piston cooling nozzle |
| JP2015188951A (en) * | 2014-03-27 | 2015-11-02 | 三菱マテリアル株式会社 | Cutting tool with coolant hole |
| CN105436578A (en) * | 2015-12-18 | 2016-03-30 | 株洲钻石切削刀具股份有限公司 | Drilling cutting tool |
| CN208613826U (en) * | 2018-07-09 | 2019-03-19 | 江苏飞达钻头股份有限公司 | Preceding chip dividing groove bores |
-
2018
- 2018-07-09 CN CN201810745734.0A patent/CN108526554B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511120A (en) * | 1965-12-29 | 1970-05-12 | Bbc Brown Boveri & Cie | Gun drill |
| KR19980068751A (en) * | 1997-02-24 | 1998-10-26 | 양수제 | Brazed twist drill |
| CN201534235U (en) * | 2009-08-07 | 2010-07-28 | 上海惠而顺精密工具有限公司 | Integral hard-alloy printed circuit board drill |
| CN102441695A (en) * | 2010-09-30 | 2012-05-09 | 苏州春兴精工股份有限公司 | Diamond cutter for processing deep hole |
| CN102350520A (en) * | 2011-09-21 | 2012-02-15 | 广东工业大学 | Printed circuit board symmetrical drill with double chip dividing grooves |
| CN203343497U (en) * | 2013-06-09 | 2013-12-18 | 常州吉瑞刀具技术有限公司 | High-speed deep-hole twist drill |
| CN104416194A (en) * | 2013-08-28 | 2015-03-18 | 天工爱和特钢有限公司 | Chip separation drill |
| CN103737075A (en) * | 2013-11-26 | 2014-04-23 | 苏州道众机械制造有限公司 | Liquid cooling drill bit |
| JP2015188951A (en) * | 2014-03-27 | 2015-11-02 | 三菱マテリアル株式会社 | Cutting tool with coolant hole |
| CN204018808U (en) * | 2014-08-14 | 2014-12-17 | 武汉泰尔斯刀具有限公司 | A kind of drill bit for deep hole processing |
| CN204108412U (en) * | 2014-09-23 | 2015-01-21 | 浙江北工工具有限公司 | A kind of heat-resisting break-proof drill |
| CN104533588A (en) * | 2014-12-26 | 2015-04-22 | 山东华源莱动内燃机有限公司 | Piston cooling nozzle |
| CN105436578A (en) * | 2015-12-18 | 2016-03-30 | 株洲钻石切削刀具股份有限公司 | Drilling cutting tool |
| CN208613826U (en) * | 2018-07-09 | 2019-03-19 | 江苏飞达钻头股份有限公司 | Preceding chip dividing groove bores |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110497027A (en) * | 2019-08-31 | 2019-11-26 | 厦门曦哲贸易有限公司 | A kind of outer diameter adjustable reamer based on spiral fluted disc |
| EP4197677A1 (en) * | 2021-12-15 | 2023-06-21 | AB Sandvik Coromant | Drill with improved chip evacuation |
| WO2023110177A1 (en) * | 2021-12-15 | 2023-06-22 | Ab Sandvik Coromant | Drill with improved chip evacuation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108526554B (en) | 2023-09-15 |
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