CN205129019U - High speed bit - Google Patents
High speed bit Download PDFInfo
- Publication number
- CN205129019U CN205129019U CN201520767265.4U CN201520767265U CN205129019U CN 205129019 U CN205129019 U CN 205129019U CN 201520767265 U CN201520767265 U CN 201520767265U CN 205129019 U CN205129019 U CN 205129019U
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- Prior art keywords
- main cutting
- bit
- cutting edge
- central axis
- high speed
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Abstract
The utility model discloses a high speed bit, including bit sub and the bit body continuous with the bit sub, be provided with the the central axis centrosymmetric helicla flute of two relative bit bodys on the bit body, the main cutting edge that is provided with two carbide is inlayed to the tip of bit body, the relative the central axis central symmetry of two main cutting edges, two main cutting edges contact in the the central axis position each other, and the main cutting edge is 52 to 55 with the central axis's contained angle alpha, the anterior angle beta of main cutting edge is - 5 to 15, the rake face and the helicla flute smooth transition of main cutting edge. This drill bit cutting resistance is little, and cutting edge intensity is high, is fit for the high -speed cutting, and toughness is good moreover, and is with low costs.
Description
Technical field
The utility model relates to a kind of drill bit, particularly relates to a kind of spiral bit of machining hole.
Background technology
Fluted drill is most widely used aperture knife tool.It is formed primarily of working portion and shank.Gain the name because of the likeness in form fried dough twist of its chip pocket curl.Helicla flute has 2 grooves, 3 grooves or more groove, but the most common with 2 grooves.Friction during in order to reduce to hole between targeting part and hole wall, it is slight inverted cone shape that fluted drill reduces diameter from apex point gradually to shank direction.On the helical angle major effect cutting edge of fluted drill, the size of anterior angle, sword lobe intensity and chip removal performance, be generally 25 ° ~ 32 °.Spiral groove can use the method processing such as milling, grinding, hot rolling or hot extrusion, and the front end of drill bit forms cutting tip after sharpening.The cutting tip drift angle of standard fluted drill is 118, and chisel edge angle is 40 ° ~ 60 °, and relief angle is 8 ° ~ 20 °.Due to structural reason, anterior angle is large at outer rim place, reduce gradually to centre, and chisel edge place is negative rake (can reach about-55 °), plays squeezing action during drilling.
Fluted drill is with the instrument of the circular hole of drilling workpiece by the rotary cutting of its relative fixed axis.Drill bit, when holing, is cut workpiece mainly through cutter head top, is discharged by chip by chip area.Fluted drill can be clamped on manual, electronic Handheld drill instrument or drilling machine, milling machine, lathe and even machining center and use.
Rake face due to fluted drill is helicoid, and on main cutting edge, the anterior angle of each point is different.From cylindrical to center, anterior angle reduces gradually.Point of a knife place anterior angle is about 30 °, is then about-30 ° near chisel edge place.Anterior angle on chisel edge is-50 ° ~-60 °.That is, drill bit at the sharp but intensity difference of the main cutting edge at point of a knife place, chisel edge and the main cutting edge intensity near chisel edge place high but not sharp, nearly outer rim place anterior angle is excessive, and when processing hard material, edge strength often dislikes not enough; And nearly unbearable place anterior angle is too small, cause chip deformation large, cutting resistance is large.
Drill bit is many is in addition made up of high-speed steel entirety, and intensity difference, is not suitable for high-speed cutting.Also there is alloy tool steel bit intensity high, be applicable to high-speed cutting, but alloy tool steel bit cost is high, and poor toughness, be highly brittle, easily damage.
Utility model content
For existing existing above-mentioned deficiency, technical problem to be solved in the utility model is to provide a kind of high speed bit, and this bit cutting resistance is little, and edge strength is high, is applicable to high-speed cutting, and good toughness, and cost is low.
In order to solve the problems of the technologies described above, a kind of high speed bit of the present utility model, the bit body comprising bit sub and be connected with bit sub, described bit body is provided with the centrosymmetric helicla flute of central axis of two relative bit bodys; The main cutting edge being provided with two carbide alloy is inlayed in the end of bit body; Described two main cutting edge opposing axial Central Symmetries, described two main cutting edges contact with each other at axial centerline, and the angle α of main cutting edge and central axis is 52 ° to 55 °; The anterior angle β of main cutting edge is-5 ° to 15 °; Rake face and the helicla flute of main cutting edge seamlessly transit.
After adopting said structure, because two main cutting edges are Hardmetal materials, therefore edge strength is high, is applicable to high-speed cutting.Again due to the central axis Central Symmetry of the relative bit body of two main cutting edges, two main cutting edges contact with each other at axial centerline, it is the chisel edge elimination of-50 ° ~-60 ° by the anterior angle of general spiral bit, and the anterior angle β of main cutting edge is-5 ° to 15 °, therefore cutting resistance is little, and edge strength is high.The angle α of main cutting edge and central axis is 52 ° to 55 °, and cone angle is little, facilitates drill bit to pierce; Bit body is provided with the centrosymmetric helicla flute of central axis of two relative bit bodys, facilitates chip discharge; Rake face and the helicla flute of main cutting edge seamlessly transit, and facilitate chip to enter helicla flute; Inlay in the end of bit body the main cutting edge being provided with two carbide alloy and saved cost.This bit cutting resistance is little, and edge strength is high, is applicable to high-speed cutting, and good toughness, and cost is low.
Preferred embodiment of the present utility model, the end-beveling γ of described bit sub is 20 ° to 30 °.Drill bit is facilitated to load drill chuck.
Preferred embodiment of the present utility model, the carbide alloy of described main cutting edge is W-Co kind carbide alloy.Be suitable for the processing of nonferrous metal and alloy, cast iron, heat-resisting alloy etc.
Preferred embodiment of the present utility model, the carbide alloy of described main cutting edge is kennametal.Be suitable for the processing of carbon steel and steel alloy, steel forgings etc.
Preferred embodiment of the present utility model, the carbide alloy of described main cutting edge is tungsten titanium tantalum (niobium) series hard alloy.Be suitable for the processing of heat resisting steel, potassium steel, stainless steel, high-grade alloy steel etc.
Preferred embodiment of the present utility model, the anterior angle β of described main cutting edge is 3 ° to 8 °.Be suitable for the processing of the materials such as nonferrous metal and alloy, cast iron, heat-resisting alloy.
Preferred embodiment of the present utility model, the anterior angle β of described main cutting edge is 10 ° to 15 °.Be suitable for the processing of carbon steel and the material such as steel alloy, steel forgings.
Preferred embodiment of the present utility model, the anterior angle β of described main cutting edge is-5 ° to 0 °.Be suitable for the processing of the materials such as heat resisting steel, potassium steel, stainless steel, high-grade alloy steel.
Preferred embodiment of the present utility model, the angle α of described main cutting edge and central axis is 54 °.The cone angle of drill bit is little, facilitates drill bit to pierce.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of detailed description of the invention of a kind of high speed bit of the utility model.
Fig. 2 is the A-A sectional view in structure shown in Fig. 1.
In figure: 1. bit sub, 2. bit body, 3. central axis, 4. helicla flute, 5. main cutting edge, 6. rake face.
Detailed description of the invention
Below with reference to drawings and Examples, the utility model is described in detail.
As shown in Figure 1, a kind of high speed bit, the bit body 2 comprising bit sub 1 and be connected with bit sub 1.The end-beveling γ of bit sub 1 is 20 °, and γ also can be the unspecified angle between 20 ° to 30 °.Bit body 2 is provided with the centrosymmetric helicla flute 4 of central axis 3 of two relative bit bodys 2.The main cutting edge 5 being provided with two W-Co kind carbide alloy is inlayed in the end of bit body 2; Also can inlay the main cutting edge 5 that kennametal is set, now be suitable for the processing of nonferrous metal and alloy, cast iron, heat-resisting alloy etc.; The main cutting edge 5 that tungsten titanium tantalum (niobium) series hard alloy is set can also be inlayed, be now suitable for the processing of heat resisting steel, potassium steel, stainless steel, high-grade alloy steel etc.Described two main cutting edge 5 opposing axial 3 Central Symmetries, described two main cutting edges 5 contact with each other in central axis 3 position, and main cutting edge 5 is 54 ° with the angle α of central axis 3, also can be other angle between 52 ° to 55 °.The anterior angle β of main cutting edge 5 is as shown in Figure 23 ° to 8 °, and the angle outside drill bit is large, and inboard angle is little, also can select other angle between-5 ° to 15 ° or angular range; As the processing for heat resisting steel, potassium steel, stainless steel, high-grade alloy steel etc., the anterior angle β of main cutting edge 5 is 10 ° to 15 °; As the processing for heat resisting steel, potassium steel, stainless steel, high-grade alloy steel etc., the anterior angle β of main cutting edge 5 is-5 ° to 0 °.Rake face 6 and the helicla flute 4 of main cutting edge 5 seamlessly transit.
This high speed bit due to two main cutting edges 5 be W-Co kind Hardmetal materials, therefore edge strength is high, be suitable for nonferrous metal and alloy, cast iron, heat-resisting alloy etc. high-speed cutting processing.Again due to two main cutting edge 5 opposing axial 3 Central Symmetries, two main cutting edges 5 contact with each other in central axis 3 position, it is the chisel edge elimination of-50 ° ~-60 ° by the anterior angle of general spiral bit, and the anterior angle β of main cutting edge 5 is 3 ° to 8 °, therefore cutting resistance is little, edge strength is high, is suitable for the high-speed cutting processing of nonferrous metal and alloy, cast iron, heat-resisting alloy etc.Main cutting edge 5 is 54 ° with the angle α of central axis 3, and cone angle is little, facilitates drill bit to pierce; Bit body 2 is provided with two centrosymmetric helicla flutes 4 of opposing axial 3, facilitates chip discharge; Rake face 6 and the helicla flute 4 of main cutting edge 5 seamlessly transit, and facilitate chip to enter helicla flute 4; Inlay the main cutting edge 5 that two carbide alloy are set in the end of bit body 2 and save cost; The end-beveling γ of bit sub 1 is 20 °, facilitates drill bit to load drill chuck.This bit cutting resistance is little, and edge strength is high, is applicable to the hole of the materials such as high-speed cutting nonferrous metal and alloy, cast iron, heat-resisting alloy, and good toughness, and cost is low.
Should be noted that, the explanation of above-described embodiment the application of unrestricted the utility model, only exemplary illustration principle of the present utility model and effect, but not for limiting protection domain of the present utility model.Rights protection scope of the present utility model, should be as disclosed in the claims.
Claims (7)
1. a high speed bit, the bit body (2) comprising bit sub (1) and be connected with bit sub (1), is characterized in that: central axis (3) the centrosymmetric helicla flute (4) described bit body (2) being provided with two relative bit bodys (2); The main cutting edge (5) being provided with two carbide alloy is inlayed in the end of bit body (2); Described two main cutting edges (5) opposing axial (3) Central Symmetry, described two main cutting edges (5) contact with each other in central axis (3) position, and main cutting edge (5) is 52 ° to 55 ° with the angle α of central axis (3); The anterior angle β of main cutting edge (5) is-5 ° to 15 °; Rake face (6) and the helicla flute (4) of main cutting edge (5) seamlessly transit.
2. high speed bit according to claim 1, is characterized in that: the end-beveling γ of described bit sub (1) is 20 ° to 30 °.
3. high speed bit according to claim 1 and 2, is characterized in that: the carbide alloy of described main cutting edge (5) is W-Co kind carbide alloy.
4. high speed bit according to claim 1 and 2, is characterized in that: the carbide alloy of described main cutting edge (5) is kennametal.
5. high speed bit according to claim 3, is characterized in that: the anterior angle β of described main cutting edge (5) is 3 ° to 8 °.
6. high speed bit according to claim 4, is characterized in that: the anterior angle β of described main cutting edge (5) is 10 ° to 15 °.
7. high speed bit according to claim 1 and 2, is characterized in that: described main cutting edge (5) is 54 ° with the angle α of central axis (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520767265.4U CN205129019U (en) | 2015-09-30 | 2015-09-30 | High speed bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520767265.4U CN205129019U (en) | 2015-09-30 | 2015-09-30 | High speed bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205129019U true CN205129019U (en) | 2016-04-06 |
Family
ID=55614844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520767265.4U Expired - Fee Related CN205129019U (en) | 2015-09-30 | 2015-09-30 | High speed bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205129019U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513791A (en) * | 2016-12-30 | 2017-03-22 | 太仓韬信信息科技有限公司 | Twist drill for machining stainless steel |
| CN109513936A (en) * | 2018-11-27 | 2019-03-26 | 汪杨志 | High speed bit with damping performance |
-
2015
- 2015-09-30 CN CN201520767265.4U patent/CN205129019U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106513791A (en) * | 2016-12-30 | 2017-03-22 | 太仓韬信信息科技有限公司 | Twist drill for machining stainless steel |
| CN109513936A (en) * | 2018-11-27 | 2019-03-26 | 汪杨志 | High speed bit with damping performance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20210930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |