CN211164423U - Straight rake angle flat drill with grooved conical screw end edge - Google Patents
Straight rake angle flat drill with grooved conical screw end edge Download PDFInfo
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- CN211164423U CN211164423U CN201921438478.7U CN201921438478U CN211164423U CN 211164423 U CN211164423 U CN 211164423U CN 201921438478 U CN201921438478 U CN 201921438478U CN 211164423 U CN211164423 U CN 211164423U
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- screw head
- chip removal
- groove
- removal groove
- flat
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Abstract
The utility model relates to a straight anterior angle flat drill of fluted cone spiral shell head end sword. The utility model aims at providing a straight anterior angle spade drill of trough of belt circular cone spiral shell head end sword to improve chip removal efficiency. The technical scheme of the utility model is that: the flat drill comprises a handle part and a flat cutter part formed at the front end of the handle part, wherein a conical screw head concentric and coaxial with the handle part is formed at the center of the front end of the flat cutter part; the front end of the flat cutter part and two sides of the conical screw head are respectively provided with a front end cutting edge and a back front end cutting edge which are centrosymmetric about the axis of the conical screw head; the front surface of the flat cutter part is provided with a front surface chip removal groove connected with the front end cutting edge, and the back surface of the flat cutter part is provided with a back surface chip removal groove connected with the back surface front end cutting edge; the conical screw is provided with a screw head front chip removal groove and a screw head back chip removal groove, the screw head front chip removal groove extends to the front chip removal groove from the tip of the conical screw, and the screw head back chip removal groove extends to the back chip removal groove from the tip of the conical screw. The utility model is suitable for a carpenter bores the field.
Description
Technical Field
The utility model relates to a straight anterior angle flat drill of fluted cone spiral shell head end sword. Is applicable to the field of woodworking drills.
Background
Spade drills are typically a carpentry drilling tool. Such drills are easy to control the depth of the hole, and are therefore suitable for drilling both shallow holes and through holes, and are therefore widely used for machining wood materials or other similar materials. The flat drill comprises a handle part and a flat cutter part formed at the front end of the handle part, and a conical screw head is formed at the center of the front end of the flat cutter part. In the prior art, the conical screw head is not provided with a special chip removal groove, so that sawdust generated by the conical screw head is difficult to discharge, and finer sawdust is easy to form, and further the drilling efficiency and the smoothness of a hole wall are possibly influenced.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: provides a straight rake angle flat drill with a grooved conical screw head end edge, so as to improve the chip removal efficiency.
The utility model adopts the technical proposal that: the utility model provides a straight anterior angle flat drill of fluted cone spiral shell head end sword which characterized in that: the tool comprises a handle part and a flat cutter part formed at the front end of the handle part, wherein a conical screw head concentric and coaxial with the handle part is formed at the center of the front end of the flat cutter part;
the front end of the flat cutter part and two sides of the conical screw head are respectively provided with a front end cutting edge and a back front end cutting edge which are centrosymmetric about the axis of the conical screw head;
the front surface of the flat cutter part is provided with a front surface chip removal groove connected with the front end cutting edge, and the back surface of the flat cutter part is provided with a back surface chip removal groove connected with the back surface front end cutting edge;
the conical screw is provided with a screw head front chip removal groove and a screw head back chip removal groove, the screw head front chip removal groove extends to the front chip removal groove from the tip of the conical screw, and the screw head back chip removal groove extends to the back chip removal groove from the tip of the conical screw.
The screw head front chip groove and the screw head back chip groove are arranged in a straight line.
The included angle between the axis of the screw head front chip removal groove and the axis of the screw head back chip removal groove and the axis of the conical screw head is matched with the conical bottom angle of the conical screw head.
The groove bottom axes of the screw head front chip removal groove and the screw head back chip removal groove are parallel to the front and the back of the flat knife part.
The section of the front chip removal groove in the axial direction of the conical screw head is V-shaped, the front chip removal groove consists of a front groove inclined plane I and a front groove inclined plane II, and a blade tip I protruding towards the rotating advancing direction of the flat drill is formed at the joint of the front groove inclined plane I and the front end blade;
the back chip removal groove is V-shaped in cross section along the axis direction of the conical screw head, consists of a back groove inclined plane I and a back groove inclined plane II, and a blade point II protruding towards the rotating advancing direction of the flat drill is formed at the joint of the back groove inclined plane I and the back front end blade.
And a front thorn tip and a back thorn tip which are respectively connected with the front end cutting edge and the back front end cutting edge are arranged at two ends of the front end surface of the flat cutter part.
The utility model has the advantages that: the utility model discloses a set up on the circular cone spiral shell and extend to spiral shell head front chip groove and the spiral shell head back chip groove of front chip removal recess and back chip removal recess on flat sword portion, the saw-dust that circular cone spiral shell head produced is arranged to front chip removal recess and back chip removal recess and is discharged through front chip removal recess and back chip removal recess through spiral shell head front chip removal groove and spiral shell head back chip removal groove.
The utility model discloses a setting is on conical screw with positive chip removal recess and back chip removal recess complex spiral shell head front chip groove and spiral shell head back chip groove, effectively improves the chip removal efficiency at conical screw head position, reduces the produced saw-dust of conical screw head and influences the condition emergence of drilling smooth finish.
The utility model discloses well spiral shell head front chip groove and spiral shell head back chip groove extend to corresponding chip removal recess from circular cone spiral shell head point, and the axis of the positive chip groove of spiral shell head and spiral shell head back chip groove and the contained angle of circular cone spiral shell head axis are confirmed according to the circular cone base angle of this circular cone spiral shell head, improve the chip removal efficiency of the positive chip groove of spiral shell head and spiral shell head back chip groove.
Drawings
Fig. 1 is a schematic front view of the embodiment.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic cross-sectional view of F-F in fig. 1.
FIG. 4 is a schematic backside view of the embodiment.
Fig. 5 is an enlarged view of a portion B in fig. 4.
Fig. 6 is a schematic sectional view taken along line G-G in fig. 4.
FIG. 7 is a schematic side view of an embodiment.
Fig. 8 and 9 are schematic sectional views H-H in fig. 7 (two different shapes of flutes).
Fig. 10 is a schematic end view of the embodiment.
1. A handle; 2. a flat blade portion; 201. a front chip removal groove; 2011. a positive groove inclined plane I; 2012. a positive groove inclined plane II; 202. a back chip removal groove; 2021. a back groove bevel I; 2022. a back groove bevel II; 203. correcting the puncture tip; 204. back thorn tip; 205. correcting a front end blade; 2051. a blade tip I; 206. back front end blade; 2061. a blade tip II; 3. a conical screw head; 301. the front face of the screw head is provided with a chip groove; 302. the screw head back chip groove.
Detailed Description
As shown in fig. 1 to 10, the present embodiment is a fluted taper screw end edge positive rake angle flat drill, which includes a handle portion and a flat blade portion formed at the front end of the handle portion, the front end center of the flat blade portion is formed with a taper screw concentric and coaxial with the handle portion, a positive front end blade and a back front end blade symmetric with respect to the axis center of the taper screw are respectively formed on the front end surface of the flat blade portion and on two sides of the taper screw, and a positive stabbing tip and a back stabbing tip connected with the back front end blade are respectively formed at two ends of the front end surface of the flat blade portion.
The front of flat sword portion system has the front chip removal recess that links up with positive front end cutting edge in this embodiment, and flat sword portion back system has the back chip removal recess that links up with back front end cutting edge. In the embodiment, the section of the front chip removal groove in the axial direction of the conical screw head is V-shaped, the front chip removal groove consists of a front groove inclined plane I and a front groove inclined plane II, and a blade tip I protruding towards the rotating advancing direction of the flat drill is formed at the joint of the front groove inclined plane I and a front end blade. The back chip removal groove is V-shaped in section along the axis direction of the conical screw head, consists of a back groove inclined plane I and a back groove inclined plane II, and a blade point II protruding towards the rotating advancing direction of the flat drill is formed at the joint of the back groove inclined plane I and the back front end blade.
In the embodiment, the conical screw head is provided with the screw head front chip removal groove and the screw head back chip removal groove, the screw head front chip removal groove extends to the front chip removal groove from the tip of the conical screw head, and the screw head back chip removal groove extends to the back chip removal groove from the tip of the conical screw head. The screw head front chip grooves are arranged into a straight line, the screw head back chip grooves are arranged into a straight line, and the included angles between the axes of the screw head front chip grooves and the screw head back chip grooves and the axis of the conical screw head are matched with the conical bottom angle of the conical screw head and are added to be 90 degrees. The axes of the groove bottoms of the screw head front chip removal groove and the screw head back chip removal groove are parallel to the front surface and the back surface of the flat knife part.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art can change, add or replace the above examples within the scope of the present invention.
Claims (6)
1. The utility model provides a straight anterior angle flat drill of fluted cone spiral shell head end sword which characterized in that: comprises a handle part (1) and a flat cutter part (2) formed at the front end of the handle part (1), wherein a conical screw head (3) concentric and coaxial with the handle part (1) is formed at the center of the front end of the flat cutter part (2);
the front end of the flat cutter part (2) and two sides of the conical screw head (3) are respectively provided with a front end cutting edge (205) and a back front end cutting edge (206) which are symmetrical about the axis center of the conical screw head (3);
the front surface of the flat cutter part (2) is provided with a front surface chip removal groove (201) connected with a front end cutting edge (205), and the back surface of the flat cutter part (2) is provided with a back surface chip removal groove (202) connected with a back front end cutting edge (206);
screw head front chip removal groove (301) and screw head back chip removal groove (302) have been seted up on circular cone screw head (3), and screw head front chip removal groove (301) extend to from circular cone screw head (3) point-end front chip removal recess (201), screw head back chip removal groove (302) extend to from circular cone screw head (3) point-end back chip removal recess (202).
2. The fluted cone screw tip positive rake angle spade drill of claim 1, wherein: the screw head front face chip discharge groove (301) and the screw head back face chip discharge groove (302) are arranged in a straight line.
3. The fluted cone screw tip positive rake angle spade drill of claim 2, wherein: the included angle between the axis of the screw head front chip removal groove (301) and the axis of the screw head back chip removal groove (302) and the axis of the conical screw head (3) is matched with the conical bottom angle of the conical screw head (3).
4. The fluted conical screw tip positive rake spade drill according to claim 1 or 2, wherein: the groove bottom axes of the screw head front chip removal groove (301) and the screw head back chip removal groove (302) are parallel to the front and the back of the flat cutter part (2).
5. The fluted cone screw tip positive rake angle spade drill of claim 1, wherein: the section of the front chip removal groove (201) in the axial direction of the conical screw head (3) is V-shaped, the front chip removal groove is composed of a front groove inclined plane I (2011) and a front groove inclined plane II (2012), and a blade tip I (2051) protruding towards the rotation advancing direction of the flat drill is formed at the joint of the front groove inclined plane I (2011) and the front end blade (205);
the section of the back chip removal groove (202) in the axial direction of the conical screw head (3) is V-shaped, the back chip removal groove consists of a back groove inclined plane I (2021) and a back groove inclined plane II (2022), and a blade tip II (2061) protruding towards the rotation advancing direction of the flat drill is formed at the joint of the back groove inclined plane I (2021) and the back front end blade (206).
6. The fluted cone screw tip positive rake angle spade drill of claim 1, wherein: and a front puncturing tip (203) and a back puncturing tip (204) which are respectively connected with the front end cutting edge (205) and the back front end cutting edge (206) are arranged at two ends of the front end surface of the flat cutter part (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921438478.7U CN211164423U (en) | 2019-08-30 | 2019-08-30 | Straight rake angle flat drill with grooved conical screw end edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921438478.7U CN211164423U (en) | 2019-08-30 | 2019-08-30 | Straight rake angle flat drill with grooved conical screw end edge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211164423U true CN211164423U (en) | 2020-08-04 |
Family
ID=71818362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921438478.7U Active CN211164423U (en) | 2019-08-30 | 2019-08-30 | Straight rake angle flat drill with grooved conical screw end edge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211164423U (en) |
-
2019
- 2019-08-30 CN CN201921438478.7U patent/CN211164423U/en active Active
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