CN212822929U - Quick drill bit of improvement structure - Google Patents
Quick drill bit of improvement structure Download PDFInfo
- Publication number
- CN212822929U CN212822929U CN202021675554.9U CN202021675554U CN212822929U CN 212822929 U CN212822929 U CN 212822929U CN 202021675554 U CN202021675554 U CN 202021675554U CN 212822929 U CN212822929 U CN 212822929U
- Authority
- CN
- China
- Prior art keywords
- rod body
- wall
- cutter holder
- holes
- rod
- 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
Landscapes
- Drilling Tools (AREA)
Abstract
The utility model provides a quick drill bit of improvement structure belongs to mechanical technical field. It has solved the current not good problem of drill bit life-span. The quick drill with the improved structure comprises a rod body, wherein two penetrating spiral holes are formed in the rod body, the front end of the rod body is a drilling part for mounting a first blade, a cylindrical cutter holder is sleeved at the rear end of the rod body, a second blade is fixedly connected to the front end of the cutter holder, an annular groove body is formed between the inner wall of the cutter holder and the outer wall of the rod body, the front end and the rear end of the groove body are respectively open and closed, the axial section of the front end of the groove body is trapezoidal, and the inner wall of the front end of the cutter holder is a conical surface with the diameter gradually increased from front; the rod body is internally provided with two water drainage holes which are in a straight strip shape and are inclined relative to the cross section of the rod body, the inner ends of the two water drainage holes are respectively communicated with two spiral holes, the outer ends of the two water drainage holes are communicated with the groove body, the outer end port of the water drainage hole is positioned between the inner end port of the water drainage hole and the second blade, and the aperture of the water drainage hole is smaller than that of the spiral. The quick drill bit with the improved structure has long service life.
Description
Technical Field
The utility model belongs to the technical field of machinery, a drill bit, especially a quick drill bit of improvement structure is related to.
Background
The drill bit is a tool for drilling through holes or blind holes in solid materials and reaming existing holes, and is a most widely used hole machining tool.
The conventional drill bit is a disposable rapid drill bit (application number: 201620576738.7) proposed by the applicant, and comprises a drill bit part and a drill bit part, wherein the drill bit part is provided with a spiral chip groove, and the lower end of the drill bit part is detachably connected with a plurality of blades; the drill shank part and the drill bit part are internally provided with cooling holes in a penetrating way, and the cooling holes are spiral.
When the drill bit is used, cooling water in the cooling hole is discharged to directly cool the blade, and the cutting edge on the auxiliary drill bit is cooled by overflowing cooling water, so that the cooling efficiency and the cooling effect of the cutting edge are poor, and the service life is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problems in the prior art and providing a quick drill bit with an improved structure and long service life.
The purpose of the utility model can be realized by the following technical proposal: a fast drill bit with an improved structure comprises a rod body, wherein two spiral holes which are in a penetrating shape are arranged in the rod body, the front end of the rod body is a drilling part for installing a first blade, a cylindrical blade holder is sleeved at the rear end of the rod body, and the front end of the blade holder is fixedly connected with a second blade; the rod body is internally provided with two water drainage holes, the water drainage holes are in a straight strip shape and are inclined relative to the cross section of the rod body, the inner ends of the two water drainage holes are respectively communicated with the two spiral holes, the outer ends of the two water drainage holes are communicated with the groove body, the outer end ports of the water drainage holes are positioned between the inner end ports of the water drainage holes and the second blade, and the hole diameter of the water drainage holes is smaller than.
When the tool apron is used, partial cooling water is led into the groove body from the spiral hole by the aid of the water drain holes, and the front end conical surface of the tool apron is pressurized, so that the cooling water is quickly drained to the drilling position of the second blade, the drilling temperature is reduced, the drilling position is lubricated, the service life of the second blade is prolonged, and machining precision is improved.
In the above-mentioned quick drill bit of improved structure, foretell blade holder rear end inner wall pastes with the body of rod outer wall and leans on mutually, has seted up the ring channel on the blade holder rear end inner wall, and the ring channel is coaxial with the blade holder, is equipped with the sealing washer in the ring channel, and the sealing washer inside wall offsets with the body of rod. Under the effect of the sealing ring, reliable sealing is formed between the rod body and the cutter holder to effectively seal the rear end of the groove body, so that cooling water flowing into the groove body can only flow forwards, and the working stability is improved.
In the above-mentioned quick drill bit of improvement structure, the blade holder links firmly with the body of rod through many bolts, and the sealing washer is in between bolt and the cell body. By adopting the design, the connecting device has the advantages of simple structure and firm connection.
In foretell quick drill bit of improvement structure, blade holder rear end integrated into one piece has the body, and the body cover is outside the body of rod, and body inside wall and body of rod outer wall paste, are equipped with the screw hole on the body of rod outer wall, are equipped with the through-hole on the body of rod lateral wall, and through-hole, screw hole and bolt quantity the same and position one-to-one, and the bolt passes the through-hole and revolves in the screw hole, and the bolt head sticiss on the body outer wall.
In the above-mentioned improved structure of the rapid drill, the included angle formed between the drainage hole and the cross section of the rod body is 30 degrees to 50 degrees, and preferably, the included angle is 45 degrees.
Compared with the prior art, when the quick drill bit with the improved structure is used, partial cooling water is introduced into the groove body from the spiral hole by the aid of the drain hole, and the front end conical surface of the cutter holder is pressurized, so that the cooling water is quickly discharged to the drilling position of the second blade, the drilling temperature is reduced, the drilling position is lubricated, the service life of the second blade is prolonged, and the machining precision is improved.
Drawings
FIG. 1 is a schematic diagram of a fast bit.
Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.
In the figure, 1, a rod body; 1a, a spiral hole; 1b, a drill part; 1c, a drain hole; 2. a first blade; 3. a tool apron; 3a, a conical surface; 3b, a pipe body; 4. a second blade; 5. a trough body; 6. a seal ring; 7. and (4) bolts.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1, the improved structure of the fast drill comprises a rod body 1, wherein two penetrating spiral holes 1a are formed in the rod body 1 for conveying cooling water. The front end of the rod body 1 is a drilling part 1b for installing the first blade 2, the rear end of the rod body 1 is sleeved with a cylindrical cutter holder 3, the front end of the cutter holder 3 is fixedly connected with the second blade 4, and when the cutter is actually used, the number of the first blade 2 and the second blade 4 can be 2 or 3 and the like according to requirements.
Specifically, as shown in fig. 1 and 2, an annular groove 5 is formed between an inner wall of the tool holder 3 and an outer wall of the rod body 1, and the groove 5 and the tool holder 3 are coaxially disposed. As shown in fig. 1, the front end and the rear end of the groove body 5 are respectively open and closed, the axial section of the front end of the groove body 5 is trapezoidal, and the inner wall of the front end of the tool apron 3 is a conical surface 3a with a diameter gradually increasing from front to back.
In the present embodiment, the rear end of the trough body 5 is closed as follows: the inner wall of the rear end of the tool apron 3 is attached to the outer wall of the rod body 1, and preferably, the inner wall of the rear end of the tool apron 3 and the outer wall of the rod body 1 at the position are cylindrical surfaces matched with each other. An annular groove is formed in the inner wall of the rear end of the tool apron 3 and is coaxial with the tool apron 3, a sealing ring 6 is arranged in the annular groove, and the inner side wall of the sealing ring 6 abuts against the rod body 1. Under the effect of the sealing ring 6, reliable sealing is formed between the rod body 1 and the tool apron 3 so as to effectively seal the rear end of the groove body 5, so that cooling water flowing into the groove body 5 can only flow forwards, and the working stability is improved. In the actual product, there are two annular grooves axially distributed along the tool holder 3, and the sealing ring 6 is arranged in each annular groove.
As shown in fig. 1, two drainage holes 1c are further formed in the rod body 1, the drainage holes 1c are straight and inclined with respect to the cross section of the rod body 1, in this embodiment, an included angle formed between the drainage holes 1c and the cross section of the rod body 1 is 30 degrees to 50 degrees, and preferably, the included angle is 45 degrees. The inner ends of the two rows of water holes 1c are respectively communicated with the two spiral holes 1a, and the outer ends of the two rows of water holes 1c are communicated with the groove body 5. In an actual product, the outer end port of the drain hole 1c is located on the outer wall of the rod body 1, the outer end port of the drain hole 1c is located between the inner end port of the drain hole 1c and the second blade 4, and the aperture of the drain hole 1c is smaller than that of the spiral hole 1 a.
Wherein, the connection mode of blade holder 3 and body of rod 1 is as follows: the tool apron 3 is fixedly connected with the rod body 1 through a plurality of bolts 7, and the sealing ring 6 is arranged between the bolts 7 and the groove body 5. Further, a pipe body 3b is integrally formed at the rear end of the tool apron 3, the pipe body 3b is sleeved outside the rod body 1, the inner side wall of the pipe body 3b is attached to the outer wall of the rod body 1, a threaded hole is formed in the outer wall of the rod body 1, through holes are formed in the side wall of the pipe body 3b, the through holes, the threaded holes and the bolts 7 are identical in number and correspond to one another in position, the bolts 7 penetrate through the through holes and are screwed in the threaded holes, and the heads of the bolts 7 are.
When the cooling device is used, partial cooling water is introduced into the groove body 5 from the spiral hole 1a through the water discharge hole 1c, and is pressurized through the conical surface 3a at the front end of the cutter holder 3, so that the cooling water is discharged to the drilling position of the second blade 4, the drilling temperature is reduced, the drilling position is lubricated, the service life of the second blade 4 is prolonged, and the machining precision is improved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (5)
1. A quick drill with an improved structure comprises a rod body (1), wherein two spiral holes (1a) which are in a penetrating shape are formed in the rod body (1), the front end of the rod body (1) is a drilling part (1b) for installing a first blade (2), a cylindrical cutter holder (3) is sleeved at the rear end of the rod body (1), and a second blade (4) is fixedly connected to the front end of the cutter holder (3), and the quick drill is characterized in that an annular groove body (5) is formed between the inner wall of the cutter holder (3) and the outer wall of the rod body (1), the front end and the rear end of the groove body (5) are respectively in an opening shape and a closed shape, the axial section of the front end of the groove body (5) is in a trapezoid shape, and the inner wall of the front end of the cutter holder (3) is a conical surface (3; still be equipped with two drainage holes (1c) in the body of rod (1), wash port (1c) are the vertical bar and for body of rod (1) cross section slope, two spiral holes (1a) are communicate respectively to the inner of two drainage holes (1c), and two drainage holes (1c) outer end all communicate cell body (5), and wash port (1c) outer end port is in between wash port (1c) inner port and second blade (4), wash port (1c) aperture is less than spiral hole (1a) aperture.
2. The fast drill with the improved structure as claimed in claim 1, wherein the inner wall of the rear end of the cutter holder (3) is attached to the outer wall of the rod body (1), the inner wall of the rear end of the cutter holder (3) is provided with an annular groove, the annular groove is coaxial with the cutter holder (3), a sealing ring (6) is arranged in the annular groove, and the inner side wall of the sealing ring (6) is abutted to the rod body (1).
3. The rapid drill with the improved structure as claimed in claim 2, wherein the cutter holder (3) is fixedly connected with the rod body (1) through a plurality of bolts (7), and the sealing ring (6) is located between the bolts (7) and the groove body (5).
4. The structure-improved quick drill bit as claimed in claim 3, wherein the rear end of the cutter holder (3) is integrally formed with a tube body (3b), the tube body (3b) is sleeved outside the rod body (1), the inner side wall of the tube body (3b) is attached to the outer wall of the rod body (1), the outer wall of the rod body (1) is provided with a threaded hole, the side wall of the tube body (3b) is provided with through holes, the threaded hole and the bolts (7) are in the same number and have one-to-one correspondence in position, the bolts (7) pass through the through holes and are screwed in the threaded holes, and the head of the bolts (7) are tightly.
5. The improved structure of the fast drill according to claim 1, 2, 3 or 4, wherein the angle formed between the drainage hole (1c) and the cross section of the drill body (1) is 30-50 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675554.9U CN212822929U (en) | 2020-08-12 | 2020-08-12 | Quick drill bit of improvement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021675554.9U CN212822929U (en) | 2020-08-12 | 2020-08-12 | Quick drill bit of improvement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212822929U true CN212822929U (en) | 2021-03-30 |
Family
ID=75132964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021675554.9U Active CN212822929U (en) | 2020-08-12 | 2020-08-12 | Quick drill bit of improvement structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212822929U (en) |
-
2020
- 2020-08-12 CN CN202021675554.9U patent/CN212822929U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100674665B1 (en) | Deep hole cutter | |
| US20150174671A1 (en) | Cutting tool, especially a drilling or milling tool | |
| CN107626960B (en) | Rotary cutting tool with replaceable tool bit, rotary cutting method thereof and tool bit mounting method | |
| CN109158666B (en) | Combined cutter and process for machining long pore by using same | |
| CN210877729U (en) | Cutter for milling machine machining | |
| CN212822929U (en) | Quick drill bit of improvement structure | |
| CN105710419A (en) | Self-cooling type drill bit | |
| JP4142930B2 (en) | Deep hole cutting tool | |
| CN204673027U (en) | Be beneficial to the composite drill bit of chip removal | |
| CN218575158U (en) | Strong internal cooling reamer | |
| CN104723165B (en) | Liquid spraying device for machining machine | |
| CN220992846U (en) | Hydraulic valve sleeve sealing port machining cutter | |
| CN112605441A (en) | Drill bit mechanism capable of being cooled rapidly | |
| CN219254165U (en) | Special-shaped cutter for machining bolt ring groove | |
| CN219503880U (en) | Durable screw tap of composite metal | |
| CN214977985U (en) | External cooling changes internal cooling drill bit joint frock | |
| CN216912348U (en) | Tungsten steel uncoated reamer with good toughness | |
| CN220838297U (en) | Internal thread cutter | |
| CN220426939U (en) | High-efficiency internal cooling end mill for processing alloy groove cavity | |
| CN216263698U (en) | Taper shank end milling cutter | |
| CN217121970U (en) | Internal cooling structure for precision hole machining reamer | |
| CN215966498U (en) | Cutter for machining main oil sprayer hole based on diesel engine cylinder cover | |
| CN109262029B (en) | Inner-cooling twist drill | |
| CN217991038U (en) | Self-cooling twist drill | |
| CN220050162U (en) | Multi-angle drill bit with drip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |