CN207756970U - A kind of drill bit for the metal works drilling processing with cementation zone - Google Patents
A kind of drill bit for the metal works drilling processing with cementation zone Download PDFInfo
- Publication number
- CN207756970U CN207756970U CN201820106106.3U CN201820106106U CN207756970U CN 207756970 U CN207756970 U CN 207756970U CN 201820106106 U CN201820106106 U CN 201820106106U CN 207756970 U CN207756970 U CN 207756970U
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- cutter hub
- leading portion
- back segment
- drill bit
- chip space
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Abstract
The utility model provides a kind of drill bit for the metal works drilling processing with cementation zone, it can solve the problem of low processing efficiency existing for Conventional processing methods, high processing costs and can solve to cannot be satisfied processing technology requirement using existing single disposably drill drill bit.It includes the cutter hub and handle of a knife of concentric integrally connected, the chip space that two extend spirally is offered on cutter hub periphery to form two sword valves in cutter hub, two sword valves are equipped with seamed edge；Cutter hub includes cutter hub leading portion and cutter hub back segment, the axial length l of cutter hub leading portion is 5mm, chip space penetrate through the cutter hub leading portion, cutter hub back segment and chip space cutter hub leading portion and cutter hub back segment the smooth drop-over in joint, the helical angle of cutter hub leading portion is fixed angle β 1 and the value range of β 1 is at 0 °~10 °, the helical angle of cutter hub back segment gradually fades to fixed angle β 2 from the end of cutter hub leading portion to the chip space tail end by fixed angle β 1, and the value range of fixed angle β 2 is 25 °~35 °.
Description
Technical field
The utility model is related to the cutter field of metal cutting process, it is especially for having heat treatment hard on surface
Change the cutter of the metal material machining of layer, it is specially a kind of for the metal works drilling processing with cementation zone
Drill bit.
Background technology
Requiring surface to have the heavy duty such as common gear, bearing, clutch part in electro-mechanical arts good wear-resisting more
Performance and core have excellent shock resistance, therefore would generally be heat-treated to such part and be obtained with the surface in parts
One layer of hardness HRC52-62 hardened layer.And when carrying out drilling processing to the metal material with cementation zone, usually
It is first to remove cementation zone with milling cutter, then drilling processing is carried out to workpiece with drill bit；It is more that it does not only take up the warehouse compartment of tool magazine,
And frequent tool changing is needed in process, thus productive temp is low, processing efficiency is low, of high cost.In order to save the cost of charp tool
And productive temp is improved, it is in the art to attempt that drill bit the cementation zone to workpiece, core progress one are completed using one
The drilling processing of secondary property, but conventional drill bit can there is a phenomenon where crushing knife even breakings when piercing cementation zone；And lead to
Cutting angle of cutting edge can be changed or the cutting edge of drill bit is designed as to the shape of straight cutting edge by crossing the design platform on the apex point of drill bit
Formula reduces the sharp journey of seamed edge cutting edge so as to play the role of protecting apex point by reducing the axial rake of apex point
Degree, occurs crushing knife so that drill bit is cut when drilling to cementation zone when effectively drill bit being avoided to pierce cementation zone
Performance is cut greatly to be played, but the drill bit of this form is in the not high workpiece inner core of cutting hardness, not due to cutting edge
It is enough sharp, can there is a problem of that processing load is big, and axial rake is smaller and can cause chip removal poor performance, easily twine bits phenomenon
To which hole wall can be scratched, the processing technology requirement of workpiece cannot be satisfied.
Utility model content
In view of the above-mentioned problems, the utility model provide it is a kind of for cementation zone metal works drilling plus
The drill bit of work can solve the problems, such as that processing efficiency existing for Conventional processing methods is low, high processing costs, and can solve using existing
There is single drill bit is disposably drilled to cannot be satisfied the problem of processing technology requires.
Its technical solution is a kind of drill bit for the metal works drilling processing with cementation zone comprising
The cutter hub and handle of a knife of concentric integrally connected, the cutter hub and handle of a knife are cylinder, and wherein the body diameter of cutter hub is D1, handle of a knife
Body diameter be D2, the chip space that two extend spirally is offered on the cutter hub periphery to form two swords in cutter hub
Valve, two sword valves are equipped with seamed edge, it is characterised in that：The cutter hub includes cutter hub leading portion and cutter hub back segment, the cutter hub
The axial length l of leading portion is 5mm, and the chip space penetrates through the cutter hub leading portion, cutter hub back segment and the chip space in the knife
The smooth drop-over in joint of body leading portion and cutter hub back segment, the angular dimension of the helixangleβ 1 of the cutter hub leading portion is fixed and β 1 takes
It is worth range at 0 °~10 °, the helixangleβ 2 of the cutter hub back segment is from the end of cutter hub leading portion to the chip space tail end by fixing
Angle beta 1 gradually increases to β 2, and the value range of β 2 is at 25 °~35 °.
Further, 1=0 °~5 radial rake γ of the cutter hub leading portion, the radial rake γ 2=of the cutter hub back segment
10 °~18 °.
Further, outer rim corner R is arranged in the point of a knife of the cutter hub front end, and the outer rim corner R is 0.3mm~1mm.
The beneficial effects of the utility model are：
(1) its cutter hub is made of cutter hub leading portion and cutter hub back segment, after the chip space perforation cutter hub leading portion and cutter hub on cutter hub
Section, and chip space smooth connection in the joint of cutter hub leading portion and cutter hub back segment, and the helical angle of cutter hub leading portion uses angle
Range is designed in 0 °~10 ° of low pitch angle, to which cutter hub leading portion can realize smaller axial rake, can reduce rib afterwards
The intensity of side cutting edge effectively prevent cutter hub leading portion seamed edge cutting edge in work hardening layer to collapse scarce；And cutter hub back segment uses value model
It is trapped among 25 °~35 ° of large helix angle design, to which cutter hub back segment can realize larger axial rake, to effectively improve cutter hub
The sharpness of the seamed edge cutting edge of back segment, the cutting requirement for meeting workpiece inner sandwich layer；Therefore the utility model drill bit its primary feed was both
The drilling processing to workpiece surface hardened layer can be met can meet the processing of the drilling to workpiece inner core metal material again, thus can be big
It is big to improve processing efficiency, save the cost of charp tool, reduce production cost；
(2) its cutter hub leading portion is designed using 0 °~5 ° of small radial rake, therefore the intensity of point of a knife is high, push effect is apparent；
And cutter hub back segment is designed using 10 °~18 ° of big radial rake simultaneously, therefore the shear action of cutter hub back segment is strong, cutting is brisk；From
And processing efficiency can be further increased, ensure machining accuracy；
(3) outer rim corner R is arranged by the point of a knife in cutter hub front end, further increases drill bit point of a knife intensity, improve cutter
Service life.
Description of the drawings
Fig. 1 is a kind of structure for the drill bit to the metal works drilling processing with cementation zone of the utility model
Schematic diagram；
Fig. 2 is cutter hub leading portion helical angle, cutter hub back segment helical angle schematic diagram in the utility model；
Fig. 3 is A-A in Fig. 1 to enlarged structure schematic diagram；
Fig. 4 is the B-B direction enlarged structure schematic diagram in Fig. 1；
Fig. 5 is the close-up schematic view at the position of tool tip of cutter hub front end in the utility model.
Reference numeral：10- cutter hubs, 11- cutter hub leading portions, 12- cutter hub back segments, 20- handle of a knifes, 30- chip spaces, 40- seamed edges.
Specific implementation mode
See Fig. 1, a kind of drill bit for the metal works drilling processing with cementation zone of the utility model, packet
The cutter hub 10 and handle of a knife 20 of concentric integrally connected are included, cutter hub 10 and handle of a knife 20 are cylinder, wherein the body diameter of cutter hub 10
Body diameter for D1, handle of a knife 20 is D2, and the chip space 30 extended spirally is offered on 10 periphery of cutter hub to be formed in cutter hub
Two sword valves, two sword valves are equipped with seamed edge 40；Cutter hub 10 includes cutter hub leading portion 11 and cutter hub back segment 12, the axis of cutter hub leading portion 11
It is 5mm to length l, chip space 30 penetrates through cutter hub leading portion 11, cutter hub back segment 12 and chip space 30 after cutter hub leading portion 11 and cutter hub
Section 12 the smooth drop-over in joint, the angular dimension of the helixangleβ 1 of cutter hub leading portion 11 fix and the value range of β 10 °~
10 °, the helixangleβ 2 of cutter hub back segment 12 is gradually increased from the end of cutter hub leading portion 11 to 30 tail end of chip space by fixed angle β 1
To β 2, the value range of β 2 is at 25 °~35 °.
See Fig. 3 and Fig. 4,1=0 °~5 radial rake γ of cutter hub leading portion 11, the radial rake γ 2=of cutter hub back segment 12
10 °~18 °.
See Fig. 5, outer rim corner R is arranged in the point of a knife of cutter hub front end 11, and outer rim corner R is 0.3mm~1mm.
The utility model drill bit realizes the variation that helical angle is realized on same chip space so that nothing connects in chip space
Trace, chip removal are smooth, to break the conventional method for needing to be segmented fluting when helical angle variation, manufacture high in machining efficiency, cost
It is low.
The specific implementation of the utility model is described in detail above, but content be only the utility model create compared with
Good embodiment should not be construed as limiting the practical range of the utility model creation.All created according to the utility model is applied
All the changes and improvements made by range etc. should all still belong within the patent covering scope of the utility model.
Claims (3)
1. a kind of drill bit for the metal works drilling processing with cementation zone comprising the knife of concentric integrally connected
Body (10) and handle of a knife (20), the cutter hub (10) and handle of a knife (20) are cylinder, wherein the body diameter of cutter hub (10) be D1,
The body diameter of handle of a knife (20) is D2, offer on cutter hub (10) periphery two chip spaces extended spirally (30) to
Cutter hub forms two sword valves, and two sword valves are equipped with seamed edge (40), it is characterised in that：Before the cutter hub (10) includes cutter hub
The axial length l of section (11) and cutter hub back segment (12), the cutter hub leading portion (11) is 5mm, described in chip space (30) perforation
Cutter hub leading portion (11), cutter hub back segment (12) and the chip space (30) connect the cutter hub leading portion (11) and cutter hub back segment (12)
The angular dimension of smooth drop-over at conjunction, the helixangleβ 1 of the cutter hub leading portion (11) is fixed and the value range of β 1 is at 0 °~10 °,
The helixangleβ 2 of the cutter hub back segment (12) is from the end of cutter hub leading portion (11) to the chip space (30) tail end by fixed angle β
1 gradually increases to β 2, and the value range of β 2 is at 25 °~35 °.
2. a kind of drill bit for the metal works drilling processing with cementation zone according to claim 1,
It is characterized in that：1=0 °~5 radial rake γ of the cutter hub leading portion (11), the radial rake γ 2=of the cutter hub back segment (12)
10 °~18 °.
3. a kind of drill bit for the metal works drilling processing with cementation zone according to claim 1 or 2,
Outer rim corner R is arranged in the point of a knife of the cutter hub front end, and the outer rim corner R is 0.3mm~1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820106106.3U CN207756970U (en) | 2018-01-19 | 2018-01-19 | A kind of drill bit for the metal works drilling processing with cementation zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820106106.3U CN207756970U (en) | 2018-01-19 | 2018-01-19 | A kind of drill bit for the metal works drilling processing with cementation zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207756970U true CN207756970U (en) | 2018-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820106106.3U Active CN207756970U (en) | 2018-01-19 | 2018-01-19 | A kind of drill bit for the metal works drilling processing with cementation zone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207756970U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108161081A (en) * | 2018-01-19 | 2018-06-15 | 苏州阿诺精密切削技术有限公司 | For the drill bit to the metal works Drilling operation with cementation zone |
-
2018
- 2018-01-19 CN CN201820106106.3U patent/CN207756970U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108161081A (en) * | 2018-01-19 | 2018-06-15 | 苏州阿诺精密切削技术有限公司 | For the drill bit to the metal works Drilling operation with cementation zone |
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