CN112692341A - Rod-like rotary cutting device - Google Patents
Rod-like rotary cutting device Download PDFInfo
- Publication number
- CN112692341A CN112692341A CN202110014738.3A CN202110014738A CN112692341A CN 112692341 A CN112692341 A CN 112692341A CN 202110014738 A CN202110014738 A CN 202110014738A CN 112692341 A CN112692341 A CN 112692341A
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- handle
- rotary cutting
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- assembling
- rod
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- 238000005520 cutting process Methods 0.000 title claims abstract description 78
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 238000010168 coupling process Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 238000003780 insertion Methods 0.000 description 22
- 230000037431 insertion Effects 0.000 description 22
- 238000000034 method Methods 0.000 description 8
- 238000003754 machining Methods 0.000 description 7
- 238000003825 pressing Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/12—Adapters for drills or chucks; Tapered sleeves
Abstract
The invention relates to the technical field of cutting, in particular to a rod type rotary cutting device. In order to solve the problems of poor stability and cutting precision, easy fracture, large processing difficulty and high production cost of the conventional rod-type rotary cutting device, the invention provides the rod-type rotary cutting device, wherein a connecting handle of a drill bit is of a polygonal column structure; the connecting end of the assembling handle is provided with an assembling round hole with the central axis coinciding with the central axis of the assembling handle, and the inner diameter D of the assembling round hole is smaller than the diameter D0 of a circumscribed circle of the polygonal section of the connecting handle; the connecting handle of the drill bit is inserted into the assembling round hole and is in interference fit with the assembling round hole. The rod-type rotary cutting device not only ensures the assembly stability and the assembly precision between the drill bit and the assembly handle, thereby ensuring the cutting precision of the rod-type rotary cutting device, but also ensures the strength of the assembly round holes of the connecting handle and the assembly handle of the drill bit, and avoids the rod-type rotary cutting device from being broken in the rotary cutting process to influence the use.
Description
Technical Field
The invention relates to the technical field of cutting, in particular to a rod type rotary cutting device.
Background
A rod-type rotary cutting apparatus generally includes a cutting bit and a shank for mounting the cutting bit, and a shank of the cutting bit is inserted into an insertion hole of the shank. After the connecting handle of the drill bit is inserted into the insertion hole of the assembling handle, the connecting handle can be fixed in the insertion hole in various ways, such as:
as shown in fig. 1 and 2, a pressing groove 0111 is formed on a side wall of the connection handle 011 of the drill bit 01, a pressing block 0211 is formed on an inner wall of the insertion hole 021 of the assembly handle 02, and when the connection handle 011 of the drill bit 01 is inserted into the insertion hole 021 of the assembly handle 02, the pressing block 0211 is inserted into the pressing groove 0111, so that the drill bit 01 is prevented from falling off from the assembly handle 02 during the rotary cutting process. However, since the force of the pressing block 0211 acting on the connecting shank 011 and the assembling shank 02 is a unidirectional force, the assembling shank 02 is easily bent or has a problem, the coaxiality and the accuracy between the drill bit 01 and the assembling shank 02 are poor, and the stability and the rotary cutting accuracy of the drill bit 01 are low.
As shown in fig. 3 and 4, the connection shaft 011 and the assembly shaft 02 of the drill bit 01 are provided with a through-hole 03, and after the connection shaft 011 of the drill bit 01 is inserted into the insertion hole 021 of the assembly shaft 02, a pin (not shown) is inserted into the through-hole 03 to connect the drill bit 01 and the assembly shaft 02 together, so as to prevent the drill bit 01 from falling off from the assembly shaft 02 during the rotary cutting process. However, the connecting handle 011 and the assembling handle 02 of the drill bit 01 are fixedly connected by the bolt, so that the processing difficulty and the assembling difficulty between the drill bit 01 and the assembling handle 02 are increased, the strength of each component and the whole body in the rod-type rotary cutting device is reduced, and the drill bit is easy to break.
As shown in fig. 5 and 6, after the connection shank 011 of the drill bit 01 is inserted into the insertion hole 021 of the assembly shank 02, an adhesive layer 04 is formed by filling an adhesive in a gap between the connection shank 011 and an inner wall of the insertion hole 021, and the connection shank 011 is fixed in the insertion hole 021 by the adhesive or the assembly shank 011 of the drill bit 01 and the assembly shank 011 are connected by casting to prevent the drill bit 01 from falling off the assembly shank 02 during the rotational cutting. However, the drill bit 01 and the assembly shank 02 are connected by using an adhesive or a casting method, which not only needs to increase the gap between the connection shank 011 of the drill bit 01 and the inner wall of the insertion hole 021 of the assembly shank 02, but also does not allow the adhesive to bear a large torque and a high cutting temperature, and the casting method reduces the hardness and the mechanical strength of the unstable connection between the drill bit 01 and the assembly shank 02.
As shown in fig. 7 and 8, a knurling pattern (not shown) is rolled on the side wall of the connection handle 011 of the drill bit 01, a rolling groove 022 is formed on the outer wall of the insertion hole 021 of the assembly handle 02, and after the connection handle 011 of the drill bit 01 is inserted into the insertion hole 021 of the assembly handle 02, the outer wall of the insertion hole 021 is pressed at the rolling groove 022, so that the connection handle 011 of the drill bit 01 is fixedly connected with the assembly handle 02, and the drill bit 01 is prevented from falling off from the assembly handle 02 in the rotary cutting process. However, the side wall of the connecting handle 011 is provided with the knurling pattern to be connected with the insertion hole 021 of the assembling handle 02, so that the processing procedures of the drill bit 01 and the assembling handle 02 are increased, the processing production period of the drill bit 01 and the assembling handle 02 is prolonged, the assembly precision and the torque can be ensured only by strictly designing the tooth form and the size of the knurling pattern according to the size of the connecting handle 011, and the design and processing difficulty is high.
As shown in fig. 9, the connection handle 011 of the drill bit 01 is a taper handle, the insertion hole 021 of the assembly handle 02 is a taper hole, and after the connection handle 011 of the drill bit 01 is inserted into the insertion hole 021 of the assembly handle 02, the connection handle 011 and the insertion hole 021 are in interference fit and fixed connection, so as to prevent the drill bit 01 from falling off from the assembly handle 02 in the rotary cutting process. However, the taper structure needs to ensure the self-locking performance and the matching (matching) precision, and the processing quality of the taper handle and the taper hole needs to be further improved, so that the processing difficulty of the drill bit 01 and the assembly handle 02 is further increased, the processing cost is high, the total length of the drill bit 01 and the assembly handle 02 after being assembled is difficult to control, the consistency is poor, and batch production is difficult.
In conclusion, the conventional rod-type rotary cutting device is poor in stability and cutting precision, easy to break, high in processing difficulty, high in production cost and difficult to produce in batches.
Disclosure of Invention
In order to solve the problems of poor stability and cutting precision, easy fracture, large processing difficulty and high production cost of the conventional rod-type rotary cutting device, the invention provides the rod-type rotary cutting device which comprises a drill bit and an assembly handle, wherein the connection handle of the drill bit is of a polygonal column structure; the connecting end of the assembling handle is provided with an assembling round hole, the central axis of the assembling round hole is superposed with the central axis of the assembling handle, and the inner diameter D of the assembling round hole is smaller than the diameter D0 of a circumscribed circle of the polygonal section of the connecting handle; the connecting handle of the drill bit is inserted into the assembling round hole of the assembling handle and is in interference fit with the assembling round hole. In the rod-type rotary cutting device, the connecting handle of the polygonal prism structure of the drill bit is inserted into the assembling circular hole in the assembling handle and is in interference fit with the assembling circular hole, so that the assembling stability and the assembling precision between the drill bit and the assembling handle can be ensured, the cutting precision of the rod-type rotary cutting device can be ensured, the strength of the connecting handle of the drill bit and the assembling circular hole of the assembling handle can be ensured, and the rod-type rotary cutting device is prevented from being broken in the rotary cutting process to influence the use. In addition, the connecting handle of the drill bit in the rod-type rotary cutting device is of a polygonal column structure, the connecting end of the assembling handle is provided with the assembling circular hole which is in interference fit connection with the connecting handle of the drill bit, and the rod-type rotary cutting device is simple in structure, easy to process and low in production cost.
Preferably, the free end of the stem is provided with a cylindrical guide section having a diameter D' which is smaller than the diameter D0 of the circumscribed circle of the stem. Therefore, when the drill bit and the assembling handle are assembled, the cylindrical guide section positioned at the free end of the connecting handle on the drill bit is inserted into the assembling circular hole, so that the insertion position and the insertion direction of the connecting handle of the drill bit are guided, the insertion is convenient, and the production cost of the rod-type rotary cutting device is further reduced. Further, a taper section is arranged between the guide section and the connecting handle. Therefore, the taper section is arranged between the guide section and the connecting handle to complete transition connection, so that the connection strength between the guide section and the connecting handle can be improved, and the drill bit is prevented from being broken from the connection part between the guide section and the connecting handle due to stress in the insertion or use process of the guide section. Further preferably, the connecting handle is of a hexagonal prism structure. The connecting handle is simple in structure and convenient to manufacture.
Preferably, a positioning hole is formed in the end face of the positioning end of the assembling handle, and the central axis of the positioning hole coincides with the central axis of the assembling circular hole. Therefore, when the assembly handle is machined, the positioning hole can be used as a positioning reference for machining, the machining of the assembly handle is facilitated, and the machining precision of the assembly handle can be improved. Furthermore, the opening of the positioning hole is in a taper hole shape. Therefore, when the positioning column is machined, the positioning column is convenient to machine and insert into the positioning hole, and the use is convenient.
Preferably, the assembling handle comprises a connecting section and a positioning section, and the assembling circular hole is formed in the free end of the connecting section; the location section with linkage segment coaxial coupling, just the location section with be provided with annular positioning ring groove between the linkage segment, and the central axis of this positioning ring groove with the central axis coincidence of linkage segment. The assembly handle is simple in structure and convenient to connect with the driving mechanism by utilizing the positioning section when in use. Furthermore, a reinforcing section is arranged between the connecting section and the positioning ring groove, and the reinforcing section is coaxially connected with the connecting section through a connecting taper section. Therefore, the reinforcing section is arranged between the connecting section of the assembling handle and the positioning ring groove, so that the connecting strength between the connecting section and the positioning section can be enhanced, and the requirements on installation and use of the drill bit with larger specification can be met. Further preferably, the reinforcing section and the positioning section are both polygonal columns. The reinforcing section and the positioning section have simple structures, convenient manufacture and low production and processing cost.
Preferably, the connecting section is a cylindrical structure or a polygonal prism structure. The connecting section has simple structure, convenient manufacture and low production and processing cost, and can further reduce the production cost of the rod-like rotary cutting device.
Drawings
Fig. 1 is a partial sectional view schematically showing a conventional bar-type rotary cutting apparatus according to a first connection method;
FIG. 2 is an enlarged schematic view of the sectional structure A-A in FIG. 1;
fig. 3 is a partial sectional view schematically showing a conventional bar-type rotary cutting apparatus according to a second coupling method;
FIG. 4 is a schematic sectional view of the structure of B-B in FIG. 3;
fig. 5 is a partial sectional structural view of a prior art third connection type of a rod-like rotary cutting apparatus;
FIG. 6 is a schematic cross-sectional view of C-C of FIG. 5;
fig. 7 is a partial sectional view schematically showing a prior art bar-type rotary cutting apparatus according to a fourth connection method;
FIG. 8 is a schematic cross-sectional view of D-D of FIG. 7;
fig. 9 is a partial sectional view schematically showing a conventional fifth coupling type of a rod-like rotary cutting apparatus;
FIG. 10 is a schematic structural view of a first embodiment of a bar-type rotary cutting apparatus according to the present invention;
fig. 11 is a partial sectional structural view of the bar-type rotary cutting apparatus shown in fig. 10;
FIG. 12 is a schematic view of the construction of a drill bit in the shank-like rotary cutting apparatus shown in FIG. 10;
FIG. 13 is an enlarged view of the direction K in FIG. 12;
fig. 14 is a partial sectional structural view of an assembly shank in the bar-type rotary cutting apparatus shown in fig. 10;
FIG. 15 is a schematic structural view of a second embodiment of a bar-type rotary cutting apparatus according to the present invention;
fig. 16 is a partial sectional structural view of the bar-type rotary cutting apparatus shown in fig. 15;
fig. 17 is a partial sectional structural view of an assembly shank in the bar-type rotary cutting apparatus shown in fig. 15;
FIG. 18 is a schematic cross-sectional view of E-E of FIG. 16;
FIG. 19 is a schematic cross-sectional view of F-F of FIG. 16;
FIG. 20 is an enlarged view of II in FIG. 18;
FIG. 21 is an enlarged schematic view of III in FIG. 16;
FIG. 22 is an enlarged schematic view of IV in FIG. 1;
fig. 23 is a schematic view showing the structure of the fitting circular hole of the fitting shank after the lever-like rotary cutting apparatus shown in fig. 15 is removed.
Detailed Description
The rod-like rotary cutting apparatus of the present invention will be described in detail with reference to FIGS. 10 to 22.
Example 1
As shown in fig. 10 to 14, the rod-like rotary cutting apparatus of the present invention comprises a drill bit 1 and an assembly shank 2, the connection shank 11 of the drill bit 1 having a polygonal prism structure; the connecting end of the assembling handle 2 is provided with an assembling round hole 21, the central axis of the assembling round hole 21 is coincident with the central axis of the assembling handle 2, and the inner diameter D of the assembling round hole 21 is smaller than the diameter D0 of the circumscribed circle of the polygonal section of the connecting handle 11; the connecting handle 11 of the drill bit 1 is inserted into the assembling round hole 21 of the assembling handle 2 and is in interference fit with the assembling round hole 21. In the rod-like rotary cutting device, the connecting handle 11 of the drill bit 1 in the polygonal prism structure is inserted into the assembling circular hole 21 on the assembling handle 2 and is in interference fit with the assembling circular hole 21, so that the assembling stability and the assembling precision between the drill bit 1 and the assembling handle 2 can be ensured, the cutting precision of the rod-like rotary cutting device can be ensured, the strength of the connecting handle 11 of the drill bit 1 and the assembling circular hole 21 of the assembling handle 2 can be ensured, and the rod-like rotary cutting device is prevented from being broken in the rotary cutting process and influencing the use. In addition, the connecting handle 11 of the drill bit 1 in the rod-like rotary cutting device is of a polygonal column structure, the connecting end of the assembling handle 2 is provided with the assembling circular hole 21 which is in interference fit connection with the connecting handle 11 of the drill bit 1, and the rod-like rotary cutting device is simple in structure, easy to machine and low in production cost. Preferably, the free end of the stem 11 is provided with a cylindrical guide section 12, the diameter D' of the guide section 12 being smaller than the diameter D of the circumcircle of the stem 11. Thus, when the drill bit 1 and the assembling handle 2 are assembled, the cylindrical guide section 12 at the free end of the connecting handle 11 on the drill bit 1 is inserted into the assembling circular hole 21, so that the inserting position and the inserting direction of the connecting handle 11 of the drill bit 1 are guided, the inserting is convenient, and the production cost of the rod-type rotary cutting device is further reduced. Preferably, a tapered section 13 is provided between the guide section 12 and the connecting shank 11. Thus, the taper section 13 is arranged between the guide section 12 and the connecting handle 11 to complete transition connection, so that the connection strength between the guide section 12 and the connecting handle 11 can be improved, and the drill bit 1 is prevented from being broken from the connection part between the guide section 12 and the connecting handle 11 due to stress in the insertion or use process of the guide section 12. Preferably, the stem 11 is of a hexagonal prism structure. The connecting handle 11 is simple in structure and convenient to manufacture. Preferably, a positioning hole 22 is provided on an end surface of the positioning end of the fitting stem 2, and a central axis of the positioning hole 22 coincides with a central axis of the fitting circular hole 21. Thus, when the assembly shank 2 is machined, the positioning hole 22 can be used as a positioning reference for machining, so that the machining of the assembly shank 2 is facilitated, and the machining accuracy of the assembly shank 2 can be improved. Preferably, the opening of the positioning hole 22 is in a tapered hole shape. Therefore, during machining, the positioning columns are convenient to machine and insert into the positioning holes 22, and use is convenient. Preferably, the assembling handle 2 comprises a connecting section 23 and a positioning section 24, and the assembling circular hole 21 is opened at the free end of the connecting section 23; the positioning section 24 is coaxially connected with the connecting section 23, an annular positioning ring groove 25 is arranged between the positioning section 24 and the connecting section 23, and the central axis of the positioning ring groove 25 is overlapped with the central axis of the connecting section 23. The assembly handle is simple in structure and convenient to connect with the driving mechanism by utilizing the positioning section when in use. Preferably, the connecting section 23 is a polygon prism structure, such as a hexagonal prism, and has the advantages of simple structure, convenient manufacture and low production and processing cost.
Example 2
As shown in fig. 14 to 22, compared with embodiment 1, a reinforcing section 26 is provided between the connecting section 23 and the position ring groove 25 of the assembling shank 2 in this embodiment, and the reinforcing section 26 is coaxially connected with the connecting section 23 by a connecting taper section 27. Thus, the reinforcing section 26 is arranged between the connecting section 23 of the assembling handle 2 and the positioning ring groove 25, so that the connecting strength between the connecting section 23 and the positioning section 24 can be enhanced, and the installation and use requirements of the drill bit 1 with larger specification can be met. Preferably, the reinforcing section 26 and the positioning section 24 are each polygonal prisms, such as hexagonal prisms. The reinforcing section 26 and the positioning section 24 have simple structures, convenient manufacture and low production and processing cost. Preferably, the connecting section 23 is a cylindrical structure. The connecting section 23 has simple structure, convenient manufacture and low production and processing cost, and can further reduce the production cost of the rod-like rotary cutting device.
As shown in FIGS. 16 and 18 to 22, in the rod-like rotary cutting apparatus of the present invention, the diameter D' of the pilot segment 12 of the drill bit 1 is smaller than the inner diameter D of the fitting circular hole 21 of the fitting shank 2, the amount of clearance between the pilot segment and the inner wall of the fitting circular hole 21 is X, and
in this way, when the lever-type rotary cutting apparatus according to the present invention is embodied, the value of the clearance amount X can be adjusted according to the ease of assembly. The diameter D0 of the circumcircle of the connecting handle 11 on the drill bit 1 is larger than the diameter D' of the guide section 12, and the diameter drop between the connecting handle 11 and the guide section 12An amount is δ, and
thus, in embodying the present invention, the amount of diameter drop δ between the shank 11 and the pilot segment 12 can be adjusted according to the basic dimensions of the drill bit 1 and the shank 2, the requirements for the assembly of the two, and the torque required for use. The diameter D0 of the circumscribed circle of the connecting handle 11 is greater than the inner diameter D of the assembling round hole 21, the interference magnitude when the connecting handle 11 is inserted into the assembling round hole 21 and is in interference connection with the assembling round hole 21 is Y, and
in this way, when the present bar-like rotary cutting apparatus is embodied, the magnitude of interference between the shank 11 and the fitting circular hole 21 can be adjusted according to the basic size, the processing manner, the torque required for use, and the use condition of the bar-like rotary cutting apparatus.
In addition, as shown in fig. 16, 22 and 23, since the connecting shank 11 of the drill bit 1 is in interference fit with the fitting circular hole 21 when the connecting shank 11 is fitted into the fitting circular hole 21 of the fitting shank 2, under the action of external pressure during fitting, the connecting shank 11 of the drill bit 1 is guided downward at the location of the guide section 12, is extruded into the fitting circular hole 21 of the fitting shank 2, and the fitting groove 211 corresponding to the corner on the connecting shank 11 is extruded on the hole wall of the fitting circular hole 21, so that after the connecting shank 11 is in interference connection (i.e. meshing fixed connection) with the fitting circular hole 21, the drill bit 1 and the fitting shank 2 are fixed into a whole, and during use, there is neither axial relative sliding nor circumferential reverse relative rotation.
Claims (10)
1. A rod-like rotary cutting device is characterized by comprising a drill bit and an assembly handle, wherein the connection handle of the drill bit is of a polygonal column structure; the connecting end of the assembling handle is provided with an assembling round hole, the central axis of the assembling round hole is superposed with the central axis of the assembling handle, and the inner diameter D of the assembling round hole is smaller than the diameter D0 of a circumscribed circle of the polygonal section of the connecting handle; the connecting handle of the drill bit is inserted into the assembling round hole of the assembling handle and is in interference fit with the assembling round hole.
2. The bar-like rotary cutting apparatus according to claim 1, wherein the free end of the shank is provided with a cylindrical guide section having a diameter D' smaller than a diameter D0 of a circumcircle of the shank.
3. The bar-like rotary cutting apparatus according to claim 2, wherein a tapered section is provided between the guide section and the connecting shank.
4. The stick-type rotary cutting apparatus according to claim 3, wherein the connecting shank has a hexagonal prism structure.
5. The rod-like rotary cutting apparatus according to any one of claims 1 to 4, wherein a positioning hole is provided on an end face of the positioning end of the fitting shank, and a center axis of the positioning hole coincides with a center axis of the fitting circular hole.
6. The rod-like rotary cutting apparatus as claimed in claim 5, wherein the opening of the positioning hole is formed in a tapered hole shape.
7. The rod-like rotary cutting apparatus according to claim 6, wherein the fitting shank includes a connecting section and a positioning section, and the fitting circular hole is opened at a free end of the connecting section; the location section with linkage segment coaxial coupling, just the location section with be provided with annular positioning ring groove between the linkage segment, and the central axis of this positioning ring groove with the central axis coincidence of linkage segment.
8. The rod-like rotary cutting apparatus according to claim 7, wherein a reinforcing section is provided between the connecting section and the retainer ring groove, and the reinforcing section is coaxially connected to the connecting section by a connecting taper section.
9. The bar-like rotary cutting apparatus according to claim 8, wherein the reinforcing section and the positioning section are both polygonal prisms.
10. The rod-like rotary cutting apparatus according to claim 7, wherein the connecting segment has a cylindrical structure or a polygonal prism structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110014738.3A CN112692341A (en) | 2021-01-06 | 2021-01-06 | Rod-like rotary cutting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110014738.3A CN112692341A (en) | 2021-01-06 | 2021-01-06 | Rod-like rotary cutting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112692341A true CN112692341A (en) | 2021-04-23 |
Family
ID=75514964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110014738.3A Pending CN112692341A (en) | 2021-01-06 | 2021-01-06 | Rod-like rotary cutting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112692341A (en) |
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| CN2412687Y (en) * | 2000-03-13 | 2001-01-03 | 朱小坤 | Twist drill |
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| CN207188851U (en) * | 2017-06-12 | 2018-04-06 | 杭州希恩希拓斯精密机械有限公司 | With the top cutter of evagination |
| CN108080680A (en) * | 2017-12-15 | 2018-05-29 | 潍坊江钢机械有限公司 | Tapping machine cutter head with center positioning device |
| CN208613825U (en) * | 2018-07-09 | 2019-03-19 | 江苏飞达钻头股份有限公司 | A kind of assembled entirety hexagonal-handle twist drill |
| CN208822838U (en) * | 2017-12-26 | 2019-05-07 | 天津正天医疗器械有限公司 | A kind of hollow hexagon |
| CN209141311U (en) * | 2018-09-11 | 2019-07-23 | 深圳市信维通信股份有限公司 | Die assembly |
| CN211758732U (en) * | 2020-01-03 | 2020-10-27 | 常州西钻机械科技有限公司 | Press-fit hexagonal handle and square handle drill bit with press fit and torsion enhancement |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3053118A (en) * | 1960-04-29 | 1962-09-11 | Lavallee & Ide Inc | Method of manufacturing reamers |
| CN1413133A (en) * | 1999-12-21 | 2003-04-23 | 桑德维克公司 | Tool extender and tool assembly |
| CN2412687Y (en) * | 2000-03-13 | 2001-01-03 | 朱小坤 | Twist drill |
| CN2481439Y (en) * | 2001-07-04 | 2002-03-13 | 江苏飞达工具集团有限公司 | Hexagonal handle drill bit |
| CN1406700A (en) * | 2001-08-28 | 2003-04-02 | 马克斯泰克制造有限公司 | Assembled drill |
| JP2006175523A (en) * | 2004-11-29 | 2006-07-06 | Vessel Industrial Co Ltd | Socket for rotary tool |
| CN104708083A (en) * | 2015-03-31 | 2015-06-17 | 镇江市迈恩新工具有限公司 | Drill bit and rapid handle |
| CN106891065A (en) * | 2017-05-08 | 2017-06-27 | 十堰东纳商用车桥有限公司 | A kind of multi-functional quick pneumatic air pressure gun rifle mouth frock of silk rolling |
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| CN108080680A (en) * | 2017-12-15 | 2018-05-29 | 潍坊江钢机械有限公司 | Tapping machine cutter head with center positioning device |
| CN208822838U (en) * | 2017-12-26 | 2019-05-07 | 天津正天医疗器械有限公司 | A kind of hollow hexagon |
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| CN209141311U (en) * | 2018-09-11 | 2019-07-23 | 深圳市信维通信股份有限公司 | Die assembly |
| CN211758732U (en) * | 2020-01-03 | 2020-10-27 | 常州西钻机械科技有限公司 | Press-fit hexagonal handle and square handle drill bit with press fit and torsion enhancement |
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Effective date of registration: 20210625 Address after: 201612 area a, 1st floor, building 1, 288 Xinteng Road, Xinqiao Town, Songjiang District, Shanghai Applicant after: Shanghai Yugong Tools Co.,Ltd. Address before: 201612, No. 288, Teng Teng Road, Xinqiao Town, Shanghai, Songjiang District Applicant before: Shanghai Yugong Electromechanical Co.,Ltd. |