CN214023649U - Center drill for live center - Google Patents
Center drill for live center Download PDFInfo
- Publication number
- CN214023649U CN214023649U CN202022463081.2U CN202022463081U CN214023649U CN 214023649 U CN214023649 U CN 214023649U CN 202022463081 U CN202022463081 U CN 202022463081U CN 214023649 U CN214023649 U CN 214023649U
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- Prior art keywords
- drill
- center
- neck
- rough
- fixed handle
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- 239000002103 nanocoating Substances 0.000 claims abstract description 5
- 238000005553 drilling Methods 0.000 abstract description 10
- 210000003739 neck Anatomy 0.000 abstract 9
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 238000003754 machining Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
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Abstract
The utility model discloses a center drill used on a live center, which comprises a center drill, wherein the center of the center drill is provided with a first fixed handle and a second fixed handle, the right end of the first fixed handle is provided with a rough drill neck, and the left end of the rough drill neck is integrally connected with the right end of the first fixed handle; the left end of the second fixed handle is provided with a thin drill neck, and the right end of the thin drill neck is integrally connected with the left end of the second fixed handle; a rough drill bit is arranged at the right end of the rough drill neck and is integrally connected with the right end of the rough drill neck; the left end of the fine drill neck is provided with a fine drill bit which is integrally connected with the left end of the fine drill neck; the sizes of the two ends of the center drill are different, the center drill can be replaced according to the processing requirements under actual conditions, the two drill bits are connected with the threaded holes through the bolts on the fixed handles, the connection is firm, the disassembly and the assembly are convenient, the clamping blocks on the side surfaces can be matched with the live center to be clamped and fixed, the center drill is firm to install and not easy to loosen, the nano coating on the surfaces of the drill bits can effectively prevent flying chips from wearing the drill bits, the chip grooves at the drill necks at the two ends can be used for discharging waste chips, and the drilling efficiency and the drilling quality are effectively improved.
Description
Technical Field
The utility model belongs to the technical field of part for lathe processing, especially, relate to a center drill for on live center.
Background
The center drill is a common cutter in machining, and plays an important role in actual production. The center drill is mostly used for lathes at the earliest time and is used for drilling the center hole of shaft parts. Along with the increasing popularity of automation, the automation technology is applied to multifunctional numerical control equipment more widely. The maximum function is to point the central hole to ensure the processing position degree of the part hole. The center drill is used for prefabricating and accurately positioning the hole machining, the twist drill is guided to perform hole machining, and errors are reduced.
The center drill is used for processing center holes on end faces of parts such as shafts. Two types of core drills are commonly used: type A: a center drill without a protection cone; type B: and the center drill is provided with a cone protector. When a central hole with the diameter d = 2-10 mm is machined, a central drill without a protection cone is usually adopted; the center drilling center hole with the cone protector is a positioning base surface for mounting the shaft workpiece on a tip in order to avoid damaging a 60-degree centering cone, which is a workpiece with longer working procedures and higher precision requirement. A 60-degree conical hole of the central hole is matched with a 60-degree conical surface on the tip; the small round hole at the inner end is matched and attached with the conical surface of the tip for ensuring that the conical hole is matched and attached with the conical surface of the tip, and a small amount of lubricating oil can be stored. The central hole is commonly of type A and type B. The A-shaped central hole is only a 60-degree taper hole. The 120-degree conical surface at the outer end of the B-shaped central hole is also called a protection conical surface and is used for protecting the outer edge of the 60-degree conical hole from being damaged. And the A-type and B-type central holes are respectively processed on a lathe or a special machine tool by using corresponding central drills. Before the central hole is machined, the end face of the shaft is turned to be flat to prevent the central drill from being broken, and the peak angle of the standard central drill is 118 degrees generally.
The live center is a machine tool part in machining. The tail part is provided with a taper shank which is arranged in a taper hole of a main shaft of a machine tool or a taper hole of a tip shaft of a tailstock, and a cone at the head part of the taper shank is used for propping a workpiece. Parts with complex end faces and parts that do not allow for a central hole can be supported. The centre mainly comprises thimble, clamping device, casing, fixed pin, bearing and dabber. One end of the thimble can be used for ejecting the central hole or the inner hole of the pipe material, the top end surface of the other end of the thimble can be a spherical or conical part, and the thimble is fixed by a clamping device. When the part does not allow or cannot be used for drilling the central hole, the turning can be directly clamped by a clamping device. The shell and the mandrel are provided with pin holes, and the dead and live dual-purpose of the tip is realized by using the insertion or removal of a fixing pin. The centre can also be used for drilling, threading and reaming of workpieces.
Most of existing center drills in the market are matched with a lathe, and a live center is combined rarely, so that a center drill used for the live center is provided.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model relates to a center drill used on a live center, which comprises a center drill, wherein the center of the center drill is provided with a first fixed handle and a second fixed handle, the right end of the first fixed handle is provided with a rough drill neck, and the left end of the rough drill neck is integrally connected with the right end of the first fixed handle; the left end of the second fixed handle is provided with a thin drill neck, and the right end of the thin drill neck is integrally connected with the left end of the second fixed handle; a rough drill bit is arranged at the right end of the rough drill neck and is integrally connected with the right end of the rough drill neck; the left end of the fine drill neck is provided with a fine drill bit, and the fine drill bit is integrally connected with the left end of the fine drill neck.
As a preferred technical scheme of the utility model, the side surfaces of the first fixing handle and the second fixing handle are both provided with a fixture block, and the fixture block is integrally connected with the side surfaces of the first fixing handle and the second fixing handle; and a chamfer is turned on the edge of the left end face of the second fixed handle.
As a preferred technical solution of the present invention, a first fixing hole is drilled in the side surface of the first fixing handle, and the first fixing hole is drilled through at the right end of the side surface of the first fixing handle; and a second fixing hole is drilled in the side surface of the second fixing handle, and the left end of the side surface of the second fixing handle is drilled through.
As a preferred technical scheme of the utility model, the surface of the rough drilling neck is milled with a first chip groove, and the first chip groove is milled on the surface of the rough drilling neck and is connected with the rough drilling bit; and a second chip removal groove is milled on the surface of the fine drill neck, and the second chip removal groove is milled on the surface of the fine drill neck and is connected with the fine drill.
As an optimized technical proposal of the utility model, the surfaces of the rough drill neck and the fine drill neck are coated with nano coatings.
As a preferred technical scheme of the utility model, a bolt is arranged at the left end of the first fixed handle, and the right end of the bolt is integrally connected with the left end of the first fixed handle; a threaded hole is formed in the right end of the second fixing handle, and the threaded hole is drilled in the right end of the second fixing handle; the left end of the first fixed handle is detachably connected with the right end of the second fixed handle.
The utility model discloses following beneficial effect has:
this center is bored both ends size is different, can change according to the processing requirement under the actual conditions, it is very convenient, two not unidimensional drill bits pass through bolt and screw hole on the fixed handle and connect, firm in connection and dismouting are convenient, the chamfer of the fixed handle left end of second is the drill bit installation of being more convenient for, it is further fixed to bore the center when the fixed orifices on the fixed handle can supply the installation, the fixture block of side can cooperate live center to carry out the joint fixed, the firm and difficult not hard up of installation, drill bit surface coating's nanometer coating can effectively prevent that the drill bit from producing wearing and tearing because of flying chips, both ends bore neck department and all mill the chip groove, the operation in-process can supply the sweeps to discharge, effectively improve drilling efficiency and quality.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic sectional view of the present invention.
In the figure: 1. a central drill; 21. a first fixed handle; 22. a second stationary handle; 3. roughly drilling a neck; 4. fine drill neck; 51. a first fixing hole; 52. a second fixing hole; 6. a clamping block; 71. a first chip discharge groove; 72. a second chip groove; 8. a nano-coating; 9. a rough drill bit; 10. a fine drill bit; 11. a bolt; 12. a threaded hole; 13. and (6) chamfering.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, the utility model relates to a center drill used on a live center, which comprises a center drill 1, wherein the center of the center drill 1 is provided with a first fixed handle 21 and a second fixed handle 22, the right end of the first fixed handle 21 is provided with a rough drill neck 3, and the left end of the rough drill neck 3 is integrally connected with the right end of the first fixed handle 21; the left end of the second fixed handle 22 is provided with a thin drill neck 4, and the right end of the thin drill neck 4 is integrally connected with the left end of the second fixed handle 22; a rough drill bit 9 is arranged at the right end of the rough drill neck 3, and the rough drill bit 9 is integrally connected with the right end of the rough drill neck 3; the left end of the thin drill neck 4 is provided with a thin drill bit 10, and the thin drill bit 10 is integrally connected with the left end of the thin drill neck 4; the side surfaces of the first fixing handle 21 and the second fixing handle 22 are both provided with a fixture block 6, and the fixture block 6 is integrally connected with the side surfaces of the first fixing handle 21 and the second fixing handle 22; the edge of the left end face of the second fixed handle 22 is provided with a chamfer 13; a first fixing hole 51 is drilled in the side surface of the first fixing handle 21, and the first fixing hole 51 is drilled through the right end of the side surface of the first fixing handle 21; a second fixing hole 52 is drilled on the side surface of the second fixing handle 22, and the second fixing hole 52 is drilled through the left end of the side surface of the second fixing handle 22; a first chip groove 71 is milled on the surface of the rough drill neck 3, and the first chip groove 71 is milled on the surface of the rough drill neck 3 and is connected with the rough drill bit 9; a second chip groove 72 is milled on the surface of the fine drill neck 4, and the second chip groove 72 is milled on the surface of the fine drill neck 4 and is connected with the fine drill 10; the surfaces of the rough drill neck 3 and the fine drill neck 4 are coated with the nano coating 8.
As shown in fig. 2, the left end of the first fixing handle 21 is provided with a bolt 11, and the right end of the bolt 11 is integrally connected with the left end of the first fixing handle 21; a threaded hole 12 is formed in the right end of the second fixing handle 22, and the threaded hole 12 is drilled in the right end of the second fixing handle 22; the left end of the first fixed handle 21 is detachably connected with the right end of the second fixed handle 22.
Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The center drill used on the live center is characterized by comprising a center drill (1), wherein a first fixed handle (21) and a second fixed handle (22) are arranged in the center of the center drill (1), a rough drill neck (3) is arranged at the right end of the first fixed handle (21), and the left end of the rough drill neck (3) is integrally connected with the right end of the first fixed handle (21); the left end of the second fixed handle (22) is provided with a thin drill neck (4), and the right end of the thin drill neck (4) is integrally connected with the left end of the second fixed handle (22); a rough drill bit (9) is arranged at the right end of the rough drill neck (3), and the rough drill bit (9) is integrally connected with the right end of the rough drill neck (3); the left end of the thin drill neck (4) is provided with a thin drill bit (10), and the thin drill bit (10) is integrally connected with the left end of the thin drill neck (4).
2. The center drill for the live center as claimed in claim 1, wherein the side surfaces of the first fixing handle (21) and the second fixing handle (22) are provided with a fixture block (6), and the fixture block (6) is integrally connected with the side surfaces of the first fixing handle (21) and the second fixing handle (22); and a chamfer (13) is lathed on the edge of the left end face of the second fixed handle (22).
3. The center drill for the live center as claimed in claim 1, wherein the first fixing hole (51) is drilled on the side surface of the first fixing handle (21), and the first fixing hole (51) is drilled through at the right end of the side surface of the first fixing handle (21); a second fixing hole (52) is drilled in the side face of the second fixing handle (22), and the second fixing hole (52) is drilled through the left end of the side face of the second fixing handle (22).
4. A center drill for live center according to claim 1, characterized in that the surface of the rough drill neck (3) is milled with first flutes (71), and the first flutes (71) are milled on the surface of the rough drill neck (3) and connected with the rough drill bit (9); and a second chip groove (72) is milled on the surface of the fine drill neck (4), and the second chip groove (72) is milled on the surface of the fine drill neck (4) and is connected with the fine drill bit (10).
5. A center drill for live center according to claim 1, characterized in that the surface of the rough drill neck (3) and the fine drill neck (4) are coated with nano-coating (8).
6. The center drill for the live center as claimed in claim 1, wherein the left end of the first fixed handle (21) is provided with a bolt (11), and the right end of the bolt (11) is integrally connected with the left end of the first fixed handle (21); a threaded hole (12) is formed in the right end of the second fixing handle (22), and the threaded hole (12) is drilled in the right end of the second fixing handle (22); the left end of the first fixed handle (21) is detachably connected with the right end of the second fixed handle (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022463081.2U CN214023649U (en) | 2020-10-30 | 2020-10-30 | Center drill for live center |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022463081.2U CN214023649U (en) | 2020-10-30 | 2020-10-30 | Center drill for live center |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214023649U true CN214023649U (en) | 2021-08-24 |
Family
ID=77355268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022463081.2U Expired - Fee Related CN214023649U (en) | 2020-10-30 | 2020-10-30 | Center drill for live center |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214023649U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289762A (en) * | 2021-12-30 | 2022-04-08 | 江苏雄鹰工具有限公司 | Composite titanium-plated drill bit structure with extremely high hardness |
| CN114535664A (en) * | 2022-03-10 | 2022-05-27 | 常州市西夏墅永昌工具有限公司 | Detachable center drill convenient to clamp and position |
-
2020
- 2020-10-30 CN CN202022463081.2U patent/CN214023649U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289762A (en) * | 2021-12-30 | 2022-04-08 | 江苏雄鹰工具有限公司 | Composite titanium-plated drill bit structure with extremely high hardness |
| CN114535664A (en) * | 2022-03-10 | 2022-05-27 | 常州市西夏墅永昌工具有限公司 | Detachable center drill convenient to clamp and position |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210824 |