CN218748341U - Blade tip reinforced woodworking drill bit - Google Patents
Blade tip reinforced woodworking drill bit Download PDFInfo
- Publication number
- CN218748341U CN218748341U CN202121755582.6U CN202121755582U CN218748341U CN 218748341 U CN218748341 U CN 218748341U CN 202121755582 U CN202121755582 U CN 202121755582U CN 218748341 U CN218748341 U CN 218748341U
- Authority
- CN
- China
- Prior art keywords
- cutting edge
- main cutting
- drill
- point
- butting
- 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.)
- Active
Links
Images
Abstract
The utility model provides a blade point strengthening type woodworking drill bit, which comprises a drill body and a drill handle, wherein two spiral grooves are arranged on the drill body, a centering head is arranged at the center of the front end of the drill body, a main cutting edge is formed at the junction of the groove wall of one side of the spiral groove facing to the rotating direction and the front end of the drill body, and the main cutting edge is formed by butting the groove wall of one side of the spiral groove facing to the rotating direction and a rear cutter face; on the boundary line of the boundary of the rear cutter face and the outer cylindrical wall of the drill body, one end, facing the main cutting edge, of the cutter point formed by butting the main cutting edge and the auxiliary cutting edge is provided with a reinforcing chamfer, one end, facing away from the main cutting edge, of the cutter point formed by butting the main cutting edge and the auxiliary cutting edge is provided with a rotary blade, and the blade tip height control point of the rotary blade is positioned at one end, far away from the cutter point formed by butting the main cutting edge and the auxiliary cutting edge, of the rotary blade. The utility model has the advantages of high structure strength of the tool nose, good wear resistance and long service life.
Description
Technical Field
The utility model relates to a carpenter's drill bit field, concretely relates to type carpenter's drill bit is reinforceed to sword point.
Background
The woodworking drill generally comprises a drill body, a drill handle positioned at the rear end of the drill body, and spiral grooves arranged on the drill body, wherein a main cutting edge of the existing woodworking drill is formed by directly handing over the spiral grooves and a rear knife face at the front end of the drill body, a knife tip formed by an auxiliary cutting edge and the main cutting edge is often weaker in strength, severe friction and high temperature are born during drilling, once a hard block in wood is encountered, the main cutting edge of the knife tip is extremely easy to damage, and therefore the geometric sharpening structure of the cutting edge of the traditional woodworking drill is not beneficial to prolonging the service life.
SUMMERY OF THE UTILITY MODEL
Based on the problem, the utility model aims to provide a knife tip strengthening type carpenter's drill bit, knife tip structural strength is high, and the wearability is good, long service life's sword point.
Aiming at the problems, the following technical scheme is provided: a blade tip reinforced woodworking drill comprises a drill body and a drill handle positioned at the rear end of the drill body, wherein two spiral grooves which are arranged at intervals of 180 degrees along the circumferential direction of the drill body are arranged on the drill body, the spiral grooves are right-handed, a centering head is arranged at the center of the front end of the drill body, a main cutting edge is formed at the junction of the groove wall of one surface of the spiral groove facing to the rotating direction and the front end of the drill body, the main cutting edge is formed by butting the groove wall of one surface of the spiral groove facing to the rotating direction and a rear cutter surface, and the main cutting edge rotates by taking the axis of the drill body as the center to form a circular plane which is perpendicular to the axis of the drill body; on the boundary line of the boundary of the rear cutter face and the outer cylindrical wall of the drill body, one end of the cutter point formed by butting the rear cutter face and the auxiliary cutting edge is provided with a reinforcing chamfer, one end of the cutter point formed by butting the main cutting edge and the auxiliary cutting edge, which is back to the main cutting edge, is provided with a rotary edge, and the edge point control high point of the rotary edge is positioned at one end of the rotary edge, which is far away from the cutter point formed by butting the main cutting edge and the auxiliary cutting edge.
In the structure, the main cutting edge rotates by taking the drill body axis as a center to form a circular plane, and the circular plane is perpendicular to the drill body axis, so that the flatness of the bottom of the hole can be ensured; the rotary blade cuts and trims the hole wall during drilling, wood in the hole wall is cut and separated before the main cutting blade cuts, so that the main cutting blade can conveniently cut and remove chips, the hole wall can be trimmed, and meanwhile, the rotary blade is positioned behind a tool tip formed by butting the main cutting blade and the auxiliary cutting blade in the rotation direction of the drill body, so that the tool tip formed by butting the main cutting blade and the auxiliary cutting blade can be effectively prevented from being stuck, and the stability of drilling is effectively ensured; for avoiding main cutting edge and the butt joint of vice cutting edge directly form sharp nevertheless knife tip of low strength, set up the reinforcing chamfer, make main cutting edge and the butt joint of vice cutting edge directly formed's knife tip can have sufficient intensity, avoid appearing the emergence of phenomenons such as tipping, strengthen the chamfer simultaneously and bore and form for the gyration and be located the chamfer between pore wall and the hole bottom and can be maintained by the gyration sword at reinforcing chamfer rear, effectively guarantee the dimensional stability of trompil.
The utility model discloses further set up to, the chamfer width of reinforcing chamfer is 0.5mm-2mm.
In the above structure, the chamfer width of the reinforcing chamfer is preferably 1mm.
The utility model discloses further set up to, the place ahead of the tip that the sword point of gyration sword lies in main cutting edge and the butt joint formation of vice cutting edge on the direction of feed.
In the above-mentioned structure, guarantee that the gyration sword cuts the rethread main cutting edge cutting after the separation to the timber hole, effectively prevent the appearance of timber burr.
The utility model discloses further set up to, helicla flute pitch is 3 with boring body diameter ratio: 0.5-1.5.
In the structure, the ratio of the pitch of the spiral groove to the diameter of the drill body is preferably 3:1.
the utility model discloses further set up to, the overhead self tapping screw that is equipped with of centering.
In the structure, the self-tapping thread can provide axial feeding force when the drill bit rotates, and can play a role in centering and stabilizing the drill feeding posture.
The utility model discloses further set up to, the latter half section that bores the body is kept away from to the drillstock is equipped with the hexagon clamping part.
In the structure, the hexagonal clamping part is convenient for the drill chuck to clamp.
The utility model discloses further set up as, the inscribed circle diameter of hexagon clamping part is less than the drill shank diameter.
In the above-mentioned structure, the hexagon clamping part be convenient for with small-size electric hand drill adaptation, simultaneously in order to guarantee stereoplasm timber drilling occasionally sufficient drillstock intensity, the alternative directly presss from both sides the drill chuck on the drillstock in order to guarantee to provide sufficient moment of torsion for the drill bit.
The utility model has the advantages that: the main cutting edge rotates by taking the axis of the drill body as a center to form a circular plane, and the circular plane is perpendicular to the axis of the drill body so as to ensure the flatness of the bottom of the hole; the rotary blade cuts and trims the hole wall during drilling, and the wood in the hole wall is cut and separated before the main cutting blade cuts, so that the main cutting blade can conveniently cut and remove chips, the hole wall can be trimmed, and meanwhile, as the rotary blade is positioned behind a tool point formed by butting the main cutting blade and the auxiliary cutting blade in the rotation direction of the drill body, the tool point formed by butting the main cutting blade and the auxiliary cutting blade can be effectively prevented from being pricked, and the stability of drilling is effectively ensured; for avoiding main cutting edge and minor cutting edge to meet the direct knife tip that forms the sharpness but the low strength mutually, set up the reinforcing chamfer, make main cutting edge and minor cutting edge meet the direct knife tip that forms mutually and can have sufficient intensity, avoid appearing the emergence of phenomenons such as tipping, strengthen the chamfer simultaneously and bore for the gyration and form the chamfer that is located between pore wall and the hole bottom and can be maintained by the gyration sword at reinforcing chamfer rear, effectively guarantee the dimensional stability of trompil.
Drawings
Fig. 1 is a schematic view of the whole structure of the centering head of the present invention without self-tapping threads.
Fig. 2 is a schematic view of an orthographic projection of the main cutting edge of fig. 1 according to the present invention.
Fig. 3 is an enlarged schematic view of a portion a of fig. 1 according to the present invention.
Fig. 4 is a schematic view of the whole structure of the centering head with self-tapping threads according to the present invention.
Fig. 5 is a schematic view of an orthographic projection structure of the main cutting edge of fig. 4 according to the present invention.
Fig. 6 is an enlarged schematic view of a portion B of fig. 4 according to the present invention.
The reference numbers in the figures mean: 10-drilling a body; 11-a helical groove; 12-a centering head; 121-self-tapping threads; 13-a main cutting edge; 14-flank face; 15-minor cutting edge; 16. 16' -a blade tip; 17-reinforcing chamfer angles; 18-a revolving edge; 20-a drill shank; 21-a hexagonal clamping portion; a-boundary line.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1 to 6, the blade-tip-strengthened woodworking drill shown in fig. 1 to 6 includes a drill body 10 and a drill shank 20 located at the rear end of the drill body 10, two spiral grooves 11 are formed in the drill body 10 and spaced by 180 degrees from each other in the circumferential direction of the drill body 10, the spiral grooves 11 are right-handed, a centering head 12 is disposed in the center of the front end of the drill body 10, a main cutting edge 13 is formed at the junction of the groove wall of one side of the spiral groove 11 facing the rotation direction and the front end of the drill body 10, the main cutting edge 13 is formed by abutting the groove wall of one side of the spiral groove 11 facing the rotation direction and a flank 14, and the main cutting edge 13 rotates around the axis of the drill body 10 to form a circular plane and make the circular plane perpendicular to the axis of the drill body 10; on the boundary line a of the boundary between the flank surface 14 and the outer cylindrical wall of the drill body 10, a reinforcing chamfer 17 is provided toward one end of a nose 16 formed by the butting of the main cutting edge 13 and the secondary cutting edge 15, a turning edge 18 is provided at one end of the nose 16 formed by the butting of the main cutting edge 13 and the secondary cutting edge 15, and the elevation point of the tip 16' of the turning edge 18 is located at one end of the turning edge 18 far away from the nose 16 formed by the butting of the main cutting edge 13 and the secondary cutting edge 15.
In the above structure, the main cutting edge 13 rotates around the axis of the drill body 10 to form a circular plane, and the circular plane is perpendicular to the axis of the drill body 10 to ensure the flatness of the bottom of the hole; the rotary edge 18 cuts and trims the hole wall during drilling, wood in the hole wall is cut and separated before the main cutting edge 13 cuts, so that the main cutting edge 13 can conveniently cut and discharge chips, the hole wall can be trimmed, and meanwhile, the rotary edge 18 is positioned behind a tool tip 16 formed by butting the main cutting edge 13 and the auxiliary cutting edge 15 in the rotating direction of the drill body 10, so that the tool tip 16 formed by butting the main cutting edge 13 and the auxiliary cutting edge 15 can be effectively prevented from being stuck, and the stability of drilling is effectively ensured; in order to avoid the main cutting edge 13 and the auxiliary cutting edge 15 to be butted to directly form a sharp but low-strength tool nose 16, the strengthening chamfer 17 is arranged, so that the tool nose 16 directly formed by butting the main cutting edge 13 and the auxiliary cutting edge 15 can have enough strength, the occurrence of phenomena such as edge breakage and the like is avoided, meanwhile, the strengthening chamfer 17 is drilled for the rotary forming of a rotary edge 18 which is positioned between the hole wall and the hole bottom and can be repaired by the strengthening chamfer 17, and the dimensional stability of the opening is effectively ensured.
In this embodiment, the chamfer width C1 of the reinforcing chamfer 17 is 0.5mm to 2mm.
In the above structure, the chamfer width C1 of the reinforcement chamfer 17 is preferably 1mm.
In the present embodiment, the tip 16' of the turning edge 18 is located in front of the point 16 formed by the abutment of the main cutting edge 13 and the sub cutting edge 15 in the feeding direction.
In the above-mentioned structure, guarantee that gyration sword 18 cuts the rethread main cutting edge 13 cutting after the separation to the timber hole, effectively prevent the appearance of timber burr.
In this embodiment, the diameter ratio of the pitch of the spiral groove 11 to the drill body 10 is 3: 0.5-1.5.
In the structure, the diameter ratio of the pitch of the spiral groove 11 to the drill body 10 is preferably 3:1.
in this embodiment, the centering head 12 is provided with a self-tapping thread 121.
In the above structure, the self-tapping thread 121 can provide an axial feed force when the drill bit is rotated, and can play a role in centering and stabilizing the drill feeding posture.
In this embodiment, the rear half section of the drill shank 20 away from the drill body 10 is provided with a hexagonal clamping portion 21.
In the structure, the hexagonal clamping part 21 is convenient for clamping by the drill chuck.
In this embodiment, the diameter of the inscribed circle of the hexagonal clamping portion 21 is smaller than the diameter of the drill shank 20.
In the above-mentioned structure, hexagon clamping part 21 be convenient for with small-size electric hand drill adaptation, simultaneously in order to guarantee that stereoplasm timber drilling has sufficient drillstock 20 intensity occasionally, the alternative directly presss from both sides the drill chuck on drillstock 20 in order to guarantee to provide sufficient moment of torsion for the drill bit.
The utility model has the advantages that: the main cutting edge 13 rotates by taking the axis of the drill body 10 as a center to form a circular plane, and the circular plane is perpendicular to the axis of the drill body 10, so that the flatness of the bottom of the hole can be ensured; the rotary blade 18 cuts and trims the hole wall during drilling, and the wood in the hole wall is cut and separated before the main cutting blade 13 cuts, so that the main cutting blade 13 can conveniently cut and discharge chips, and the hole wall can be trimmed; in order to avoid the main cutting edge 13 and the auxiliary cutting edge 15 to be butted to directly form a sharp but low-strength cutter point 16, the reinforcing chamfer 17 is arranged, so that the cutter point 16 which is directly formed by butting the main cutting edge 13 and the auxiliary cutting edge 15 to be butted can have enough strength, the occurrence of edge breaking and the like is avoided, meanwhile, the reinforcing chamfer 17 is drilled for the rotation to form a chamfer which is positioned between the hole wall and the hole bottom, and the chamfer can be trimmed by the rotating edge 18 behind the reinforcing chamfer 17, and the size stability of the opening is effectively ensured.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed above should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a blade point intensive carpenter's drill bit, includes bores the body and is located the drill shank of boring body rear end, be equipped with two helicla flutes that set up along boring body circumferential direction interval 180 degrees each other on the drilling body, the helicla flute is the dextrorotation, drilling body front end center is equipped with centering head, its characterized in that: the main cutting edge is formed by butting the groove wall of one side of the spiral groove facing to the rotating direction with a rear cutter face, and rotates by taking the axis of the drill body as the center to form a circular plane which is perpendicular to the axis of the drill body; on the boundary line of the boundary of the rear cutter face and the outer cylindrical wall of the drill body, one end, facing the main cutting edge, of the cutter point formed by butting the main cutting edge and the auxiliary cutting edge is provided with a reinforcing chamfer, one end, facing away from the main cutting edge, of the cutter point formed by butting the main cutting edge and the auxiliary cutting edge is provided with a rotary blade, and the blade tip height control point of the rotary blade is positioned at one end, far away from the cutter point formed by butting the main cutting edge and the auxiliary cutting edge, of the rotary blade.
2. The point-strengthened woodworking drill according to claim 1, wherein: the chamfer width of the reinforced chamfer is 0.5mm-2mm.
3. The point-strengthened woodworking drill according to claim 1, wherein: the tip of the rotary blade is positioned in front of a blade tip formed by butting the main cutting blade and the auxiliary cutting blade in the feeding direction.
4. The point-strengthened woodworking drill bit of claim 1, wherein: the diameter ratio of the spiral groove pitch to the drill body is 3: 0.5-1.5.
5. The point-strengthened woodworking drill according to claim 1, wherein: and self-tapping threads are arranged on the centering head.
6. The point-strengthened woodworking drill bit of claim 1, wherein: the drill handle is provided with a hexagonal clamping part at the rear half section far away from the drill body.
7. The point-strengthened woodworking drill according to claim 6, wherein: the diameter of an inscribed circle of the hexagonal clamping part is smaller than that of the drill shank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121755582.6U CN218748341U (en) | 2021-07-29 | 2021-07-29 | Blade tip reinforced woodworking drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121755582.6U CN218748341U (en) | 2021-07-29 | 2021-07-29 | Blade tip reinforced woodworking drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218748341U true CN218748341U (en) | 2023-03-28 |
Family
ID=85642223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121755582.6U Active CN218748341U (en) | 2021-07-29 | 2021-07-29 | Blade tip reinforced woodworking drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218748341U (en) |
-
2021
- 2021-07-29 CN CN202121755582.6U patent/CN218748341U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1512476B1 (en) | Self-centering drill bit with pilot tip | |
| EP0315643B1 (en) | Self-centering drill bit with pilot tip | |
| US7520703B2 (en) | Twist drill with a pilot tip | |
| US4815902A (en) | Stepped fluted drill | |
| CN114029517A (en) | Inner hole machining tool capable of automatically removing chips | |
| CN202169397U (en) | Drilling and milling combined tool with combined cutting edges | |
| CN218748341U (en) | Blade tip reinforced woodworking drill bit | |
| CN216828695U (en) | Hole machining tool | |
| CN215657913U (en) | Excircle thread blade with good machining effect | |
| CN218748342U (en) | Single-blade composite woodworking drill bit | |
| CN114226812B (en) | Self-propelled efficient drill bit structure | |
| CN112045228B (en) | Center drilling blade and drilling tool thereof | |
| CN215549431U (en) | Composite woodworking drill bit | |
| US20100247259A1 (en) | Drill bit | |
| CN215825498U (en) | Internal screw joint woodworking tapper | |
| CN112496410A (en) | Drill bit with long service life and used for machining oil hole of automobile engine | |
| CN215238045U (en) | Coating ladder composite drill | |
| CN201309197Y (en) | Multi-edge screw driller | |
| CN217775668U (en) | Cemented carbide countersink drill | |
| CN114453606B (en) | Tool bit and split type hole machining cutter | |
| CN218775755U (en) | Finish milling cutter convenient to chip removal | |
| CN219746431U (en) | Step Kong Jianchi bores | |
| CN219188747U (en) | High-efficiency double-diamond edge broken hole drill | |
| CN218253060U (en) | Twist drill | |
| CN214108931U (en) | Combined type twist drill |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |