CN201012404Y - Single groove pagoda drill - Google Patents
Single groove pagoda drill Download PDFInfo
- Publication number
- CN201012404Y CN201012404Y CNU2007200347915U CN200720034791U CN201012404Y CN 201012404 Y CN201012404 Y CN 201012404Y CN U2007200347915 U CNU2007200347915 U CN U2007200347915U CN 200720034791 U CN200720034791 U CN 200720034791U CN 201012404 Y CN201012404 Y CN 201012404Y
- Authority
- CN
- China
- Prior art keywords
- drill
- pagoda
- slot
- high speed
- driller
- 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
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Abstract
The utility model relates to a single- slot pagoda driller which belongs to the hardware tools technology field. The utility model is of some improvement on the structure of the existing single-vertical slot pagoda driller. A single-vertical slot of the existing pagoda driller is changed into a spiral slot. The correspondence surface of a single-vertical slot blade edge at the front part of the existing pagoda driller is provided with a scraps-dropping slot and a blade mouth, and a slot bottom is of a paraboloid structure. The combining surface of the adjacent diameters is a concave arc surface; the combining surface of adjacent diameters can also be an inclined plane. The angle formed by the inclined plane and a lateral diameter is 43 degrees to 47 degrees. The blade edge formed under the structure is much sharper. Material scraps generated in the processing can be easily dropped out in the spiral direction, which contributes to the enhancement of the processing quality. The utility model is of strong practical applicability and can replace the existing single- vertical slot pagoda driller.
Description
Technical field
The utility model relates to a kind of single-groove high speed steel fully ground step drill, belongs to the hardware ﹠ tools technical field.
Background technology
The machining of hole all needs to finish by corresponding process equipment and instrument, in traditional hole processing, select the corresponding drill bit of replacing for use according to different apertures, for some thin plate workpiece, often there is multiple aperture to need processing, adopt different apertures to select for use the corresponding drill bit of replacing time-consuming, the labour intensity height, both be unfavorable for enhancing productivity, the also requirement of incompatible modern advanced process equipment, scientific and technical personnel had developed a kind of high speed steel fully ground step drill in recent years, be also referred to as step drill, this drill bit collection multiple diameter is an one, beginning diameter from leading section increases successively, each diameter spacing is about 5mm, be processed with and its axis single straight trough in the same way at its outer wall, just no longer need more bit change during the hole of the high speed steel fully ground step drill of this structure different-diameter on processing sheet, help enhancing productivity and satisfy the requirement of modern advanced process equipment, but the bit-withdrawing slot on the existing high speed steel fully ground step drill is single straight trough, the bottom land of straight trough has angle, straight trough and the bottom land with angle thereof are unfavorable for moving back bits, the straight trough limit of each diameter and clockwise direction has only a cutting edge, and the faying face of adjacent diameter is straight flange, the cutting edge that straight flange and straight trough limit form is not ideal enough, influences the raising of crudy.
Summary of the invention
The purpose of this utility model is to be unfavorable for moving back the dissatisfactory shortcoming of cutting edge that bits, straight flange and straight trough limit form at the straight trough that existing single straight trough high speed steel fully ground step drill exists, and provides and is beneficial to a kind of single-groove high speed steel fully ground step drill that moves back bits and help improving crudy.
The purpose of this utility model is achieved through the following technical solutions, a kind of single-groove high speed steel fully ground step drill, comprise drill body and with its for the drill shank of one, it is characterized in that the single groove on the described drill body is the helicla flute to front end from the drill body rear end, short groove of bits and cutting edge are moved back in the corresponding surface setting of leading section helicla flute cutting edge portion, and the faying face of adjacent diameter is cancave cambered surface.
The spiral fluted bottom land is a paraboloid structure;
The radius of the cancave cambered surface between adjacent diameter is 1-3mm;
The faying face of adjacent diameter also can be the inclined-plane, and the angle of an inclined-plane and a side diameter is the 43-47 degree.
Drill shank is the circle handle, or three bone knobs, or has the hexagonal handle of locating slot.
The utility model is the improvement to existing single straight trough high speed steel fully ground step drill structure, be designed to helicla flute by single straight trough that will have now on the high speed steel fully ground step drill, move back short groove of bits and cutting edge in the corresponding surface setting of leading section helicla flute cutting edge portion, and bottom land is paraboloid structure, the faying face of adjacent diameter is cancave cambered surface; The faying face of adjacent diameter also can be the inclined-plane, the angle of an inclined-plane and a side diameter is the 43-47 degree, the cutting edge that this bathtub construction forms is sharper, and at leading section formation double blade, the material bits foam that produces in process is easy to withdraw from along the hand of spiral, help improving crudy, the utlity model has very strong applicability, alternative existing single straight trough high speed steel fully ground step drill.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the structure for amplifying schematic diagram of A portion among Fig. 1;
Fig. 3 be among Fig. 1 C to structural representation;
Fig. 4 be among Fig. 1 D to the structure for amplifying schematic diagram;
Fig. 5 is that the F at Fig. 4 middle part is to structural representation;
Among the figure, 1 drill body, 2 helicla flutes, 3 faying faces, 4 parabolas, 5 shanks, 6 short grooves, 7 corresponding surface cutting edges.
The specific embodiment
Further specify the utility model in conjunction with the accompanying drawings and embodiments, the utility model constitutes for the shank 5 of one by drill body 1 with it, single groove on the drill body 1 is the helicla flute 2 to front end from drill body 1 rear end, short groove 6 of bits and cutting edge 7 are moved back in the corresponding surface setting of leading section helicla flute 2 cutting edges, the faying face 3 of adjacent diameter is cancave cambered surface, and the bottom land of helicla flute 2 is parabolic 4 structures; The radius of the cancave cambered surface between adjacent diameter is 1-3mm; The faying face 3 of adjacent diameter also can be the inclined-plane, and the angle of an inclined-plane and a side diameter is the 43-47 degree.Drill shank 5 is circle handles, or three bone knobs, or has the hexagonal handle of locating slot.
Claims (5)
1. single-groove high speed steel fully ground step drill, comprise drill body and with its for the drill shank of one, it is characterized in that the single groove on the described drill body is the helicla flute to front end from the drill body rear end, short groove of bits and cutting edge are moved back in the corresponding surface setting of leading section helicla flute cutting edge portion, and the faying face of adjacent diameter is cancave cambered surface.
2. single-groove high speed steel fully ground step drill according to claim 1 is characterized in that the spiral fluted bottom land is a paraboloid structure.
3. single-groove high speed steel fully ground step drill according to claim 1, the radius that it is characterized in that the cancave cambered surface between adjacent diameter is 1-3mm.
4. single-groove high speed steel fully ground step drill according to claim 1 is characterized in that the faying face of adjacent diameter also can be the inclined-plane, and the angle of an inclined-plane and a side diameter is 43-47 °.
5. single-groove high speed steel fully ground step drill according to claim 1 is characterized in that drill shank is the circle handle, or three bone knobs, or has the hexagonal handle of locating slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200347915U CN201012404Y (en) | 2007-02-16 | 2007-02-16 | Single groove pagoda drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200347915U CN201012404Y (en) | 2007-02-16 | 2007-02-16 | Single groove pagoda drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201012404Y true CN201012404Y (en) | 2008-01-30 |
Family
ID=39024189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200347915U Expired - Fee Related CN201012404Y (en) | 2007-02-16 | 2007-02-16 | Single groove pagoda drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201012404Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9731358B2 (en) | 2013-06-06 | 2017-08-15 | Milwaukee Electric Tool Corporation | Step drill bit |
| US11273501B2 (en) | 2018-04-26 | 2022-03-15 | Milwaukee Electric Tool Corporation | Step drill bit |
-
2007
- 2007-02-16 CN CNU2007200347915U patent/CN201012404Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9731358B2 (en) | 2013-06-06 | 2017-08-15 | Milwaukee Electric Tool Corporation | Step drill bit |
| US10252351B2 (en) | 2013-06-06 | 2019-04-09 | Milwaukee Electric Tool Corporation | Step drill bit |
| US10695845B2 (en) | 2013-06-06 | 2020-06-30 | Milwaukee Electric Tool Corporation | Step drill bit |
| USD936117S1 (en) | 2013-06-06 | 2021-11-16 | Milwaukee Electric Tool Corporation | Step drill bit |
| US11273501B2 (en) | 2018-04-26 | 2022-03-15 | Milwaukee Electric Tool Corporation | Step drill bit |
| US11691203B2 (en) | 2018-04-26 | 2023-07-04 | Milwaukee Electric Tool Corporation | Step drill bit |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080130 Termination date: 20110216 |