CN203343497U - High-speed deep-hole twist drill - Google Patents
High-speed deep-hole twist drill Download PDFInfo
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- CN203343497U CN203343497U CN 201320331556 CN201320331556U CN203343497U CN 203343497 U CN203343497 U CN 203343497U CN 201320331556 CN201320331556 CN 201320331556 CN 201320331556 U CN201320331556 U CN 201320331556U CN 203343497 U CN203343497 U CN 203343497U
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Abstract
The utility model discloses a high-speed deep-hole twist drill which comprises a cutting guide part and a drill rod. The cutting guide part is provided with a spiral chip groove in the axial direction, and the head end of the cutting guide part is provided with a drill point part which comprises a drill core, a rear cutter face, a horizontal cutting edge and two main cutting edges. The cutting guide part comprises a double-edge belt portion and a cylindrical spiral groove portion, the double-edge belt portion is arranged in front of the cylindrical spiral groove portion, the drill point portion further comprises two symmetrical crescent arc grooves, each main cutting edge is separated by a corresponding crescent arc groove into an outer cutting edge, a concave arc cutting edge and an inner cutting edge which are connected in sequence, the outer cutting edges and the concave arc cutting edges intersect to form an auxiliary drill point, and the inner cutting edges of the two main cutting edges and the horizontal cutting edge form a main drill point. The high-speed deep-hole twist drill can solve the problems of chip breaking and chip removing of a common twist drill, can reduce axial force and torque, can improve stability of the cutting process, and enhance rigidity of a drill bit, and therefore the service life of the high-speed deep-hole twist drill is prolonged.
Description
Technical field
The utility model relates to a kind of high speed depth twist drill, be applied to the deep hole machining field, as automobile, motorcycle porous parts: engine housing, aluminium casting housing, brake drum, brake disc, steering gear, wheel hub, differential shell, spindle nose, semiaxis, vehicle bridge etc., pump class, valve class, Hydraulic Elements, solar energy accessory etc.
Background technology
At present, maximum cutter that drilling deep hole is used is common depth twist drill, but the life-span is not ideal enough, has problems in processed and applied, mainly contains: approaching brill core place anterior angle, be negative value, the difference anterior angle on main sword is widely different, and machining condition is poor; The cutting load that bear at outer rim turning point place is large, quick abrasion; Chisel edge is oversize, and the chisel edge drift angle is large, and chisel edge place negative rake is large, and axial force is large, feels relieved bad; Main sword is very long, and the smear metal of formation is wide, and the speed that smear metal is flowed out from the cutting edge each point differs greatly, and is curled into wide spiral shell volume, and chip removal is not smooth, and cutting fluid is difficult to flow into.Common depth twist drill is subject to the restriction of its inherent structure, and its geometry exists some defect, and the reconditioning by its apex point part, can necessarily be improved.
Summary of the invention
Technical problem to be solved in the utility model is the defect that overcomes prior art, a kind of high speed depth twist drill is provided, it not only can solve the problem of common fluted drill chip breaking and chip removal, and can reduce axial force and moment of torsion, improve the stability of cutting process, strengthen the drill bit rigidity, thus improve its service life.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of high speed depth twist drill, comprise cutting targeting part and drilling rod, cut on targeting part along axially having helical flute, the head end of cutting targeting part is provided with apex point section, apex point section has the brill core, rear knife face, chisel edge and two main cutting edges, the cutting targeting part has Double-margin section and cylindrical spiral slot part, and Double-margin section is positioned at the front side of cylindrical spiral slot part, apex point section also has the crescent moon arc groove of two symmetries, each main cutting edge is divided into by corresponding crescent moon arc groove the outside be connected successively, arcs of recesses sword and inner edge, described outside, the arcs of recesses sword intersects the secondary apex point of formation, inner edge part and the chisel edge of described two main cutting edges form main apex point.
Further, the brill footpath back draught of described Double-margin section: on every 100 mm lengths, successively decrease 0.2 millimeter.
Further, the brill core increment of described brill core: on every 100 mm lengths, successively decrease 0.3 millimeter.
Further, the helical angle of described helical flute is 30 °.
Further, the brill core thickness of described brill core is 2.5 millimeters.
Further, be provided with the cooling fluid hole of running through the high speed depth twist drill on described high speed depth twist drill.
Further, described cooling fluid hole has two, and its port of export lays respectively in two crescent moon arc grooves.
Further, the high h of point between described main apex point and secondary apex point is 0.28mm, and the arc radius R of arcs of recesses sword 4-2 is 0.7mm, and arcs of recesses edge clearance angle α Rc is 14 °, the long L of outside is 1.4mm, angle, outside peak 2 φ are 110 °, and outer edge clearance angle α fc is 8 °, and angle, inner edge peak 2 φ τ are 135 °, interior angle of cutting edge γ tc is-15 ° ~-20 °, inner edge oblique angle τ is 40 °, and the long b ψ of chisel edge is 0.28mm, and chisel edge angle ψ is 60 °.
After having adopted technique scheme, outputed two crescent moon arc grooves on knife face after common depth twist drill, main cutting edge has been divided into to outside, arcs of recesses sword and inner edge, three sections cutting edges cut jointly, bore three apex point incisions of core, make cutting stable, improved the stability of cutting process; Chip breaking is effective, and chip removal is smooth, and tricuspid seven swords are in the ban sharp, and crescent moon arc groove divides both sides, is conducive to reduce moment of torsion and axial force in process, can increase chip space, is beneficial to chip removal, thereby has improved the service life of fluted drill.The land of this fluted drill adopts the Double-margin design, and there is back taper in Double-margin section, and the fluting form is helicla flute, and the core of boring increment is arranged during fluting, and the apex point part is totally 7 cutting edges: outside, inner edge and concave arc sword bilateral symmetry distribute, and centre is chisel edge.
The accompanying drawing explanation
The structural representation that Fig. 1 is high speed depth twist drill of the present utility model;
The structural representation of the head end of the cutting targeting part that Fig. 2 is high speed depth twist drill of the present utility model;
The G section enlarged drawing that Fig. 3 is high speed depth twist drill of the present utility model;
The top view that Fig. 4 is Fig. 2;
The A-A cutaway view that Fig. 5 is Fig. 2;
The C-C cutaway view that Fig. 6 is Fig. 2;
The D-D cutaway view that Fig. 7 is Fig. 2.
The specific embodiment
For content of the present utility model more easily is expressly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail.
As shown in Fig. 1 ~ 7, a kind of high speed depth twist drill, comprise cutting targeting part and drilling rod 1, cut on targeting part along axially having helical flute 3-1, the head end of cutting targeting part is provided with apex point section 2, apex point section 2 has the brill core, rear knife face 2-1, chisel edge 6 and two main cutting edges, the cutting targeting part has the 3-2 of Double-margin section and cylindrical spiral slot part 3-3, and the 3-2 of Double-margin section is positioned at the front side of cylindrical spiral slot part 3-3, apex point section 2 also has the crescent moon arc groove 2-2-1 of two symmetries, each main cutting edge is divided into by corresponding crescent moon arc groove 2-2-1 the outside 4-1 be connected successively, arcs of recesses sword 4-2 and inner edge 4-3, outside 4-1, arcs of recesses sword 4-2 intersects the secondary apex point 12 of formation, inner edge 4-3 part and the chisel edge 6 of two main cutting edges form main apex point 33.
The brill footpath back draught of the 3-2 of Double-margin section: 0.2/100, on every 100 mm lengths, successively decrease 0.2 millimeter.The geometric parameter of chamfering adopts: 8 ° of chamfering relief angles, 90 ° of sharp angles.
Bore the brill core increment of core :-0.3/100, on every 100 mm lengths, successively decrease 0.3 millimeter.
The helical angle of helical flute 3-1 is 30 °, and groove width m is 2.2 millimeters.
The brill core thickness that bores core is 2.5 millimeters.
Be provided with the cooling fluid hole 5 of running through the high speed depth twist drill on the high speed depth twist drill.
As shown in Fig. 2 ~ 7, the geometric parameter of this high speed depth twist drill comprises: the high h of point between main apex point 33 and secondary apex point 12 is 0.28mm, and the arc radius R of arcs of recesses sword 4-2 is 0.7mm, and arcs of recesses edge clearance angle α Rc is 14 °, the long L of outside is 1.4mm, angle, outside peak 2 φ are 110 °, and outer edge clearance angle α fc is 8 °, and angle, inner edge peak 2 φ τ are 135 °, interior angle of cutting edge γ tc is-15 ° ~-20 °, inner edge oblique angle τ is 40 °, and the long b ψ of chisel edge is 0.28mm, and chisel edge angle ψ is 60 °.The long L1 of 3-2 of Double-margin section is 50mm, and the long L2 of cylindrical spiral slot part 3-3 is 110mm, and the long L3 of drilling rod is 100mm, and high speed depth twist drill overall length is 260mm, and the land spacing f of the 3-2 of Double-margin section is 0.5mm,
Two crescent moon arc groove 2-2-1 have been outputed on knife face after common depth twist drill, main cutting edge has been divided into to outside 4-1, arcs of recesses sword 4-2 and inner edge 4-3, three sections cutting edges cut jointly, bore three apex points of core (i.e. main apex point 33 and two secondary apex points 12) incision, make cutting stable, improved the stability of cutting process; Chip breaking is effective, and chip removal is smooth, and tricuspid seven swords are in the ban sharp, and crescent moon arc groove 2-2-1 divide both sides, is conducive to reduce moment of torsion and axial force in process, can increase chip space, is beneficial to chip removal, thereby has improved the service life of fluted drill.The land of this fluted drill adopts the Double-margin design, and the 3-2 of Double-margin section has back taper, and the fluting form is helicla flute, the core of boring increment is arranged during fluting, the apex point part is totally 7 cutting edges: outside 4-1, inner edge 4-3 and concave arc sword 4-2 bilateral symmetry distribute, and centre is chisel edge 6.
Above-described specific embodiment; technical problem, technical scheme and beneficial effect that the utility model is solved further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. a high speed depth twist drill, comprise cutting targeting part and drilling rod (1), cut on targeting part along axially having helical flute (3-1), the head end of cutting targeting part is provided with apex point section (2), apex point section (2) has the brill core, rear knife face (2-1), chisel edge (6) and two main cutting edges, it is characterized in that: the cutting targeting part has Double-margin section (3-2) and cylindrical spiral slot part (3-3), and Double-margin section (3-2) is positioned at the front side of cylindrical spiral slot part (3-3), apex point section (2) also has the crescent moon arc groove (2-2-1) of two symmetries, each main cutting edge is divided into by corresponding crescent moon arc groove (2-2-1) outside (4-1) be connected successively, arcs of recesses sword (4-2) and inner edge (4-3), described outside (4-1), arcs of recesses sword (4-2) intersects formation secondary apex point (12), the inner edge of described two main cutting edges (4-3) part and chisel edge (6) form main apex point (33).
2. high speed depth twist drill according to claim 1, is characterized in that: the brill footpath back draught of described Double-margin section (3-2): on every 100 mm lengths, successively decrease 0.2 millimeter.
3. high speed depth twist drill according to claim 1 and 2, is characterized in that: the brill core increment of described brill core: on every 100 mm lengths, successively decrease 0.3 millimeter.
4. high speed depth twist drill according to claim 1, it is characterized in that: the helical angle of described helical flute (3-1) is 30 °.
5. high speed depth twist drill according to claim 1, it is characterized in that: the brill core thickness of described brill core is 2.5 millimeters.
6. high speed depth twist drill according to claim 1, is characterized in that: be provided with the cooling fluid hole (5) of running through the high speed depth twist drill on described high speed depth twist drill.
7. high speed depth twist drill according to claim 6, it is characterized in that: described cooling fluid hole (5) has two, and its port of export lays respectively in two crescent moon arc grooves (2-2-1).
8. high speed depth twist drill according to claim 1, it is characterized in that: the high h of point between described main apex point (33) and secondary apex point (12) is 0.28mm, the arc radius R of arcs of recesses sword (4-2) is 0.7mm, arcs of recesses edge clearance angle α Rc is 14 °, the long L of outside is 1.4mm, angle, outside peak 2 φ are 110 °, outer edge clearance angle α fc is 8 °, angle, inner edge peak 2 φ τ are 135 °, interior angle of cutting edge γ tc is-15 ° ~-20 °, inner edge oblique angle τ is 40 °, and the long b ψ of chisel edge is 0.28mm, and chisel edge angle ψ is 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320331556 CN203343497U (en) | 2013-06-09 | 2013-06-09 | High-speed deep-hole twist drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320331556 CN203343497U (en) | 2013-06-09 | 2013-06-09 | High-speed deep-hole twist drill |
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| Publication Number | Publication Date |
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| CN203343497U true CN203343497U (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320331556 Expired - Lifetime CN203343497U (en) | 2013-06-09 | 2013-06-09 | High-speed deep-hole twist drill |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286354A (en) * | 2013-06-09 | 2013-09-11 | 常州吉瑞刀具技术有限公司 | High-speed deep-hole twist drill |
| CN107717021A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
| CN107717020A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with straight sword type blade |
| CN108526554A (en) * | 2018-07-09 | 2018-09-14 | 江苏飞达钻头股份有限公司 | Preceding chip dividing groove bores |
| CN110170686A (en) * | 2019-05-07 | 2019-08-27 | 深圳市金洲精工科技股份有限公司 | A kind of microbit |
| CN110280813A (en) * | 2019-07-30 | 2019-09-27 | 丹阳林锐工具有限公司 | A kind of high efficiency drill |
| CN111347087A (en) * | 2020-03-30 | 2020-06-30 | 吉林省恒丰数控工具有限公司 | Drill bit with automatic chip removal function |
-
2013
- 2013-06-09 CN CN 201320331556 patent/CN203343497U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286354A (en) * | 2013-06-09 | 2013-09-11 | 常州吉瑞刀具技术有限公司 | High-speed deep-hole twist drill |
| CN107717021A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with Circular Nose Cutting Edge blade |
| CN107717020A (en) * | 2017-10-31 | 2018-02-23 | 湖南科技大学 | Carbon fibre reinforced composite target drill with straight sword type blade |
| CN108526554A (en) * | 2018-07-09 | 2018-09-14 | 江苏飞达钻头股份有限公司 | Preceding chip dividing groove bores |
| CN108526554B (en) * | 2018-07-09 | 2023-09-15 | 江苏飞达钻头股份有限公司 | Front chip dividing groove drill |
| CN110170686A (en) * | 2019-05-07 | 2019-08-27 | 深圳市金洲精工科技股份有限公司 | A kind of microbit |
| CN110280813A (en) * | 2019-07-30 | 2019-09-27 | 丹阳林锐工具有限公司 | A kind of high efficiency drill |
| CN111347087A (en) * | 2020-03-30 | 2020-06-30 | 吉林省恒丰数控工具有限公司 | Drill bit with automatic chip removal function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: DALIAN TOP-EASTERN DRILLS Co.,Ltd. Assignor: Changzhou Jirui Knife Technology Co.,Ltd. Contract record no.: 2014210000058 Denomination of utility model: High-speed deep-hole twist drill Granted publication date: 20131218 License type: Exclusive License Record date: 20140717 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131218 |