CN2565569Y - Strong composite drilling head - Google Patents
Strong composite drilling head Download PDFInfo
- Publication number
- CN2565569Y CN2565569Y CN 02260011 CN02260011U CN2565569Y CN 2565569 Y CN2565569 Y CN 2565569Y CN 02260011 CN02260011 CN 02260011 CN 02260011 U CN02260011 U CN 02260011U CN 2565569 Y CN2565569 Y CN 2565569Y
- Authority
- CN
- China
- Prior art keywords
- blade
- bit body
- drilling bit
- drill bit
- diameter
- 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 - Lifetime
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- Earth Drilling (AREA)
Abstract
The utility model relates to a drilling bit for metal cutting and mechanical process, particularly a strong composite drilling bit. The end part (4) of a drilling bit body (1) is provided with a square blade (2), and the slope (5) of the inner side and the bottom surface (7) of the blade are attached to the drilling bit body. The diameter (D) of the most outer margin of the cutting edge (8) of the slope (6) of the outer side of the blade is larger than the diameter (Do) of the end part of the drilling bit body, and the blade is fixedly connected with the drilling bit body through a fixing screw nail (3) which is positioned on the center of the blade. When the drill bit needs sharpening because of abrasion, so long as the fixing screw nail is loosened, the blade rotates 90 DEG and is fixedly reinstalled on the drilling bit body. The sharpening time is reduced, the work efficiency is enhanced, and the processing cost is reduced.
Description
One, technical field
The utility model relates to metal cutting processing equipment process tool.
Two, technical background
Boring drill bit is generally monoblock type in the processing of metal current cutting machine.Drill bit in use because frequent sharpening, so drill bit will be pulled down the back reconditioning from lathe, unproductive time is long, influences the raising of operating efficiency when machining in enormous quantities is produced, particularly when cutting edge can't reconditioning, drill bit can only integral body be scrapped, the processing cost height.
Three, summary of the invention
The utility model adopts the combined type drill bit, and reversible cutting insert is fixed on the bit body by screw, when cutting edge needs reconditioning, only need unclamp the blade hold-down screw, and rotating blade does not carry out sharpening and need not pull down drill bit.
The utility model is achieved in that a kind of powerful combined type drill bit, the end of bit body is equipped with square blade, all fit with bit body in inboard inclined-plane of blade and bottom surface, the cutting edge outer most edge diameter of living in (D) on inclined-plane, the blade outside is greater than the diameter (D of bit body end
o), blade is fixedly connected by hold-down screw and the bit body that is positioned at its center.
In above-mentioned powerful combined type drill bit, the quantity of blade is more than 2 or 2.
Four, description of drawings
Fig. 1 is the schematic diagram of powerful combined type drill bit; Fig. 2 is that the A of Fig. 1 is to view.
Among the figure, 1 is bit body, and 2 is blade, and 3 is hold-down screw, and 4 is the end, and 5 is the blade outer face, and 6 is the bit body end face, and 7 is inboard inclined-plane, and 8 is inclined-plane, the outside, and 9 is the bottom surface, and 10 is cutting edge, and 11 is last plane, and 12 is the flute plane.
Five, preferred forms
Preferred forms of the present utility model is provided by following accompanying drawing.
Referring to Fig. 1, shown in Figure 2, on the flute plane 12 of the end 4 of bit body 1, be symmetrically installed with two square four sides sword carbide alloy titanium nitride coating blades 2, its inboard inclined-plane 7 and bottom surface 9, all fit with bit body 1, the cutting edge 10 outer most edge diameters of living in (D) on inclined-plane, blade 2 outside 8 are greater than the diameter (D of bit body end 4
o), blade 2 is fixedly connected with bit body 1 by a countersunk head conical surface hold-down screw 3 that is positioned at its center.The last plane 11 of blade 2, the outer face 5 of blade 2 exceed bit body 1 center line, bit body end face 6 respectively.As 47.8 millimeters of D=φ, D
o46.5 millimeters of=φ, the thickness of blade 2 is 5 millimeters, when hold-down screw 3 is M5 * 15 countersunk head conical surface hold-down screws, when drill bit needs sharpening because of wearing and tearing, only need hold-down screw 3 is unclamped, blade 2 pulled down to reinstall around the center half-twist be fixed on the bit body 1, do not carry out sharpening and will drill bit do not pull down drill bit.Cut unproductive time thereby reduce, increase work efficiency, reduce the drill bit scrappage simultaneously, cut down finished cost.
Claims (2)
1, a kind of powerful combined type drill bit, the end (4) that it is characterized in that bit body (1) is equipped with square blade (2), fit with bit body (1) in the inboard inclined-plane (5) of blade and bottom surface (7), cutting edge (8) the outer most edge diameter of living in (D) on blade inclined-plane, the outside (6) is greater than the diameter (D of bit body end (4)
o), blade (2) is fixedly connected with bit body (1) by the hold-down screw (3) that is positioned at its center.
2, in the powerful combined type drill bit according to claim 1, the quantity that it is characterized in that blade (1) is more than 2 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02260011 CN2565569Y (en) | 2002-09-17 | 2002-09-17 | Strong composite drilling head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02260011 CN2565569Y (en) | 2002-09-17 | 2002-09-17 | Strong composite drilling head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2565569Y true CN2565569Y (en) | 2003-08-13 |
Family
ID=33727170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02260011 Expired - Lifetime CN2565569Y (en) | 2002-09-17 | 2002-09-17 | Strong composite drilling head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2565569Y (en) |
-
2002
- 2002-09-17 CN CN 02260011 patent/CN2565569Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120917 Granted publication date: 20030813 |