CN205888173U - Chip breaking drill bit with ladder sword type - Google Patents

Chip breaking drill bit with ladder sword type Download PDF

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Publication number
CN205888173U
CN205888173U CN201620801116.XU CN201620801116U CN205888173U CN 205888173 U CN205888173 U CN 205888173U CN 201620801116 U CN201620801116 U CN 201620801116U CN 205888173 U CN205888173 U CN 205888173U
Authority
CN
China
Prior art keywords
ladder
sword
drill bit
chip
main cutting
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.)
Expired - Fee Related
Application number
CN201620801116.XU
Other languages
Chinese (zh)
Inventor
孙杰
朱兆聚
国凯
刘凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong University
Original Assignee
Shandong University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong University filed Critical Shandong University
Priority to CN201620801116.XU priority Critical patent/CN205888173U/en
Application granted granted Critical
Publication of CN205888173U publication Critical patent/CN205888173U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a chip breaking drill bit with ladder sword type, includes drill tip, guide part and handle of a knife, and the guide part setting is between drill tip and handle of a knife, and the drill tip includes chisel edge and two main cutting edges, and the chisel edge lies in between two main cutting edges, and the main cutting edge includes rake face and back knife face, and the sword type of main cutting edge is the notch cuttype, and including first ladder sword and second ladder sword, first ladder sword and second ladder sword erect the sword component by ladder chisel edge and ladder. This drill bit alleviates the load on the unit cutting edge through carrying out ladder structural design to the main cutting edge, reduces behind the cutter area of contact of knife face and work piece machined surface, reduces cutting force. Simultaneously, ladder sword type can effectively increase the chip deformation degree, promotes the smear metal fracture, is favorable to the smear metal to be discharged smoothly, prevents that smear metal winding cutter phenomenon from producing, guarantees work piece processing surface quality and cutter life, improves the tool life, guarantees processingquality and machining efficiency.

Description

A kind of chip-breaking drill bit with ladder blade type
Technical field
The utility model is related to a kind of chip-breaking drill bit being applied to difficult-to-machine material drilling processing, belongs in machining Drilling cutters technical field.
Background technology
In modern industry, especially in fields such as Aero-Space, petrochemical industry, medicine equipments, with scientific and technical fast Hail exhibition, to the material performance requirement more and more higher applied, need that there is high intensity and hardness, good is heat-resisting, wear-resisting And corrosion resistance, due to these material own physical mechanical properties, determine its unworkability, be collectively referred to as " difficult processing material Material ", such as high strength steel, high temperature alloy, titanium alloy and composite etc..Especially in drilling difficult-to-machine material, because being Semi-enclosed processing, is limited by drill flute space, and chip can not smoothly be discharged in time, easily causes stifled bits, twines bits phenomenon, aggravation Tool breakage and abrasion, has a strong impact on working (machining) efficiency and crudy.How to realize chip to fracture in time, it is to avoid chip twines knife, protect Card chip is smoothly discharged, and becomes research emphasis during drilling difficult-to-machine material.
Utility model content
The utility model is directed to the deficiency that existing drill bit exists at processing " difficult-to-machine material " aspect, provides a kind of easily broken Bits, avoid twining the high chip-breaking drill bit with ladder blade type of bits, durability.
The chip-breaking drill bit with ladder blade type of the present utility model, employs the following technical solutions:
This drill bit, including apex point, guide part and handle of a knife, guide part is arranged between apex point and handle of a knife, and apex point includes chisel edge With two main cutting edges, between two main cutting edges, main cutting edge includes rake face and rear knife face to chisel edge, main cutting edge Blade type is notch cuttype, includings the first ladder sword and the second ladder sword, the first ladder sword and the second ladder sword by ladder chisel edge with Ladder erects sword composition.
Described apex point drift angle 2 θ is 140 °.
Described guide part helical angle is 40 °.
Described main cutting edge outer most edge anterior angle is 13 °, to improve the sharpness of cutting edge, effectively reduces cutting force.
Described chisel edge length is 0.6mm it is ensured that stiffness of twist drill and intensity.
The projection on basal plane is parallel with main cutting edge for described ladder chisel edge, and ladder erects sword with drill bit central axis in basal plane On projection parallel.
The length of described ladder chisel edge is 0.1d/sin θ, and wherein d is bit diameter, and θ is the half of apex point drift angle.
The height that described ladder erects sword is 0.15d/tan θ, and wherein d is bit diameter, and θ is the half of apex point drift angle.
The utility model, by drill bit main cutting edge is carried out with hierarchic structure design, mitigates the load on unit cutting edge, Reduce knife face and the contact area of workpiece machined surface after cutter, reduce cutting force.Meanwhile, ladder blade type can effectively increase Chip deformation degree, promotes chip fracture, is conducive to chip smoothly to discharge, and prevents chip to be wound around cutter phenomenon and produces it is ensured that work Part machined surface quality and cutter life, can it is adaptable to the drilling of the difficult-to-machine material such as high temperature alloy, titanium alloy is processed Effectively solving chip breaking is difficult, the problems such as easily twine bits, improve tool life it is ensured that crudy and working (machining) efficiency.
Brief description
Fig. 1 has the structural representation of the chip-breaking drill bit of ladder blade type for the utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the structural representation of ladder sword.
In figure: 1. apex point, 2. guide part, 3. handle of a knife, 4. chisel edge, 5. main cutting edge, 6. the first ladder sword, 7. the second ladder Sword.
Specific embodiment
The chip-breaking drill bit with ladder blade type of the present utility model, material is hard alloy, as shown in Figure 1, Figure 2 and Figure 3, Main inclusion apex point 1, guide part 2 and handle of a knife 3, guide part 2 is arranged between apex point 1 and handle of a knife 3.Apex point 1 includes chisel edge 4 and two Bar main cutting edge 5.For adapting to difficult-to-machine material drilling processing, apex point drift angle 2 θ is 140 °, mitigates the load on unit cutting edge, Reduce tool wear.The helical angle of guide part 2 is 40 °, to increase chip groove space, it is to avoid chip blocking is it is ensured that chip is smooth Discharge.
Chisel edge 4 is located at the apex point centre between two main cutting edges 5, in drilling process, because material drag can be produced Raw high torque, for ensureing stiffness of twist drill and intensity, the length of chisel edge 4 is set to 0.6mm, to extend cutter life.
Main cutting edge 5 includes rake face and rear knife face, and because rake face is helicoid, on sword, each point anterior angle is different, sets outer Edge anterior angle is 13 °, to increase cutting edge sharpness, reduces cutting force.The blade type of main cutting edge 5 is notch cuttype, including first Ladder sword 6 and the second ladder sword 7;First ladder sword 6 erects sword by the first ladder chisel edge and the first ladder and forms;Second ladder sword 7 Erect sword by the second ladder chisel edge and the second ladder to form.
The projection on basal plane is parallel to each other all with main cutting edge 5 for first ladder chisel edge and the second ladder chisel edge, length l mono- Sample, l=0.1d/sin θ.The projection on basal plane is mutual all with drill bit central axis for the perpendicular sword of first ladder and the perpendicular sword of the second ladder Parallel, height h is 0.15d/tan θ.Wherein d is bit diameter, and θ is the half of apex point drift angle.
Above-mentioned ladder blade type can increase chip deformation degree, promotes chip fracture it is ensured that chip breaking in time in drilling processing And chip removal, it is to avoid chip is wound around cutter, improves working (machining) efficiency.Meanwhile, ladder blade type structure can reduce knife face and work after cutter The contact area of part machined surface, mitigates friction knife break, reduces tool wear, improves cutter life it is ensured that adding Working medium amount.
Chip-breaking drill bit of the present utility model is used for the drilling of difficult-to-machine material (high strength steel, high temperature alloy, titanium alloy etc.) Processing, can effectively increase chip deformation degree, raising cutter chip breaking ability, it is to avoid block up bits, twine bits, improve working (machining) efficiency and add Working medium amount.

Claims (8)

1. a kind of chip-breaking drill bit with ladder blade type, including apex point, guide part and handle of a knife, guide part is arranged on apex point and handle of a knife Between, apex point includes chisel edge and two main cutting edges, chisel edge be located at two main cutting edges between, main cutting edge include rake face and Knife face afterwards, is characterized in that, the blade type of main cutting edge is notch cuttype, including the first ladder sword and the second ladder sword, the first ladder sword Erect sword composition with the second ladder sword by ladder chisel edge and ladder.
2. the chip-breaking drill bit with ladder blade type according to claim 1, is characterized in that, described apex point drift angle 2 θ is 140°.
3. the chip-breaking drill bit with ladder blade type according to claim 1, is characterized in that, described guide part helical angle is 40°.
4. the chip-breaking drill bit with ladder blade type according to claim 1, is characterized in that, before described main cutting edge outer most edge Angle is 13 °.
5. the chip-breaking drill bit with ladder blade type according to claim 1, is characterized in that, described chisel edge length is 0.6mm.
6. the chip-breaking drill bit with ladder blade type according to claim 1, is characterized in that, described ladder chisel edge and main cutting Projection on basal plane for the sword is parallel, and ladder erects sword, and the projection on basal plane is parallel with drill bit central axis.
7. the chip-breaking drill bit with ladder blade type according to claim 1, is characterized in that, the length of described ladder chisel edge is 0.1d/sin θ, wherein d are bit diameter, and θ is the half of apex point drift angle.
8. the chip-breaking drill bit with ladder blade type according to claim 1, is characterized in that, the height that described ladder erects sword is 0.15d/tan θ, wherein d are bit diameter, and θ is the half of apex point drift angle.
CN201620801116.XU 2016-07-28 2016-07-28 Chip breaking drill bit with ladder sword type Expired - Fee Related CN205888173U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620801116.XU CN205888173U (en) 2016-07-28 2016-07-28 Chip breaking drill bit with ladder sword type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620801116.XU CN205888173U (en) 2016-07-28 2016-07-28 Chip breaking drill bit with ladder sword type

Publications (1)

Publication Number Publication Date
CN205888173U true CN205888173U (en) 2017-01-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620801116.XU Expired - Fee Related CN205888173U (en) 2016-07-28 2016-07-28 Chip breaking drill bit with ladder sword type

Country Status (1)

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CN (1) CN205888173U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106001708A (en) * 2016-07-28 2016-10-12 山东大学 Chip breaking drill bit with step edge type

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106001708A (en) * 2016-07-28 2016-10-12 山东大学 Chip breaking drill bit with step edge type

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170118

Termination date: 20190728