CN214769184U - Hole forming cutter - Google Patents
Hole forming cutter Download PDFInfo
- Publication number
- CN214769184U CN214769184U CN202120602291.7U CN202120602291U CN214769184U CN 214769184 U CN214769184 U CN 214769184U CN 202120602291 U CN202120602291 U CN 202120602291U CN 214769184 U CN214769184 U CN 214769184U
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- hole
- concave arc
- circular ring
- convex
- ring
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Abstract
The utility model discloses a hole forming cutter, which has simple structure and is easy to realize, the concentric ring groove milling blade of the convex ring processing part and the groove section of the concentric ring groove milling blade are arranged in a concave arc, so that a convex ring concentric with a hole can be processed outside the hole, and the outer plane of the hole can be conveniently processed outside the convex ring by arranging a horizontal milling blade; the end part of the concave arc close to the central axis of the hole forming cutter is tangent to the first chamfer drilling part, so that smooth transition between the convex circular ring and the inner side wall of the hole is facilitated after machining and forming, the height of the end part of the concave arc close to the central axis of the hole forming cutter is higher than that of the end part close to the horizontal milling edge, and the central angle A of the concave arc is set in the range of 120-150 degrees, so that the height H of the convex circular ring after machining and forming relative to the outer plane of the hole is not too low or too convex, the width W between the inner ring and the outer ring of the convex circular ring after machining and forming is between 1.5R and 1.732R, and the concave arc meets certain requirements.
Description
Technical Field
The utility model relates to a hole shaping sword.
Background
In metal machining, an upper flange is provided with a convex circular ring in a large circular plane for the requirement of an assembly process, the machining in the prior art needs step-by-step machining, a middle circular hole is drilled firstly, an outer circular ring is milled subsequently, and finally the convex circular ring is machined.
Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the above-mentioned not enough of technique provides a hole shaping sword.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a hole shaping sword, is including the tip portion 1 that sets gradually, first chamfer drilling portion 2, be used for processing out the protruding ring processing portion 3 of protruding ring outside the hole and handle of a knife portion 4, first chamfer drilling portion 2 includes from tip portion 1 to the first drill edge 21, first chamfer cutting edge 22 and the second drill edge 23 that protruding ring processing portion 3 direction set gradually, protruding ring processing portion 3 is including the concentric ring recess milling edge 31 and the horizontal milling edge 32 that set gradually from inside to outside, the recess department cross-section of concentric ring recess milling edge 31 is the concave arc, and that tip that this concave arc is close to hole shaping sword axis with first chamfer drilling portion 2 is tangent and that the height of tip is higher than the height that is close to horizontal milling edge 32 to the central angle A of this concave arc is in 120 degrees to 150 degrees scopes.
Preferably, the tool nose portion 1, the first chamfer drilling portion 2 and the convex circular ring processing portion 3 are provided with a chip groove 5 extending to the tool shank portion 4.
Preferably, a fillet is arranged between the concave arc and the horizontal milling edge 32, and the radius of the fillet is smaller than that of the concave arc.
Preferably, the central angle a is 135 degrees.
Compared with the prior art, the beneficial effects of the utility model are that:
the structure of the device is simple and easy to realize, and the arrangement of the cutter tip part and the first chamfer drilling hole part is convenient for drilling a workpiece; the arrangement of the concentric circular ring groove milling blades of the convex circular ring processing part and the arrangement of the concave arcs at the groove parts of the concentric circular ring groove milling blades are convenient for processing convex circular rings concentric with the hole on the outer side of the hole, and the arrangement of the horizontal milling blades is convenient for processing the outer plane of the hole on the outer side of the convex circular ring; the end part of the concave arc close to the central axis of the hole forming cutter is tangent to the first chamfer drilling part, so that smooth transition between the convex circular ring and the inner side wall of the hole is facilitated after machining and forming, the height of the end part of the concave arc close to the central axis of the hole forming cutter is higher than that of the end part close to the horizontal milling edge, and the central angle A of the concave arc is set in the range of 120-150 degrees, so that the height H of the machined and formed convex circular ring relative to the outer plane of the hole is not too short or too convex, the height H is 0.268R-0.5R, the width W between the inner ring and the outer ring of the machined and formed convex circular ring is 1.5R-1.732R, and the machining and forming cutter adapts to certain requirements.
Drawings
Fig. 1 is a schematic structural diagram of the present application.
Fig. 2 is a partial structural schematic diagram of the present application.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of examples to facilitate understanding by those skilled in the art:
as shown in fig. 1 to 2, a hole forming tool is characterized by comprising a tool tip portion 1, a first chamfer drilling portion 2, a convex circular ring processing portion 3 for processing a convex circular ring at the outer side of a hole, and a tool shank portion 4, the first chamfer drill hole part 2 comprises a first drill blade 21, a first chamfer blade 22 and a second drill blade 23 which are sequentially arranged from the tool nose part 1 to the convex circular ring processing part 3, the convex circular ring processing part 3 comprises a concentric circular ring groove milling blade 31 and a horizontal milling blade 32 which are sequentially arranged from inside to outside, the section of the groove of the concentric circular ring groove milling blade 31 is a concave arc, the end of the concave arc near the central axis of the hole-forming cutter is tangent to the first chamfer drilling portion 2 and has a height higher than that of the end near the horizontal milling edge 32, and the central angle a of the concave arc is in the range of 120 degrees to 150 degrees.
As mentioned above, the structure of the tool bit is simple and easy to realize, and the arrangement of the tool bit part 1 and the first chamfer drilling hole part 2 is convenient for drilling a workpiece; the arrangement of the concentric circular groove milling blade 31 of the convex circular processing part 3 and the arrangement that the section of the groove of the concentric circular groove milling blade 31 is a concave arc are convenient for processing a convex circular ring concentric with the hole at the outer side of the hole, and the arrangement of the horizontal milling blade 32 is convenient for processing the outer plane of the hole at the outer side of the convex circular ring; the end part of the concave arc close to the central axis of the hole forming cutter is tangent to the first chamfer drilling part 2, so that smooth transition between the convex circular ring and the inner side wall of the hole is facilitated after machining and forming, the height of the end part of the concave arc close to the central axis of the hole forming cutter is higher than that of the end part close to the horizontal milling edge 32, and the central angle A of the concave arc is set within the range of 120-150 degrees, so that the height H of the machined convex circular ring relative to the outer plane of the hole is not too short or too convex, the height H is between 0.268R and 0.5R, the width W between the inner ring and the outer ring of the machined convex circular ring is between 1.5R and 1.732R, and the machining and forming cutter adapts to certain requirements.
As described above, in the specific implementation, the tool nose portion 1, the first chamfer drilling portion 2, and the convex circular ring machining portion 3 are provided with the chip discharge groove 5 extending to the tool shank portion 4, which is beneficial to chip discharge and resistance reduction.
As described above, in the specific implementation, the central angle a is 135 degrees, which is an intermediate value, so that the height H of the formed convex circular ring relative to the outer plane of the hole is 0.293R, and the width W between the inner and outer rings of the convex circular ring is 1.707R.
As mentioned above, in specific implementation, a fillet is provided between the concave arc and the horizontal milling edge 32, and the radius of the fillet is smaller than that of the concave arc, so as to facilitate smooth transition between the convex circular ring and the outer plane of the hole after machining.
In practice, as mentioned above, the present invention provides a hole forming tool, and all technical solutions having the same or similar structure to the present invention should be considered to fall within the scope of the present invention.
Claims (4)
1. A hole forming cutter is characterized by comprising a cutter point portion (1), a first chamfer drilling portion (2), a convex circular ring processing portion (3) and a cutter handle portion (4), wherein the cutter point portion (1), the first chamfer drilling portion (2), the convex circular ring processing portion (3) and the cutter handle portion (4) are sequentially arranged outside a hole, the first chamfer drilling portion (2) comprises a first drilling edge (21), a first chamfer cutting edge (22) and a second drilling edge (23), the cutter point portion (1) and the convex circular ring processing portion (3) sequentially arranged in the direction, the convex circular ring processing portion (3) comprises a concentric circular ring groove milling edge (31) and a horizontal milling edge (32), the cross section of the groove of the concentric circular ring groove milling edge (31) is a concave arc, the end portion of the concave arc close to a central axis of the hole forming cutter is tangent to the first chamfer drilling portion (2), and the height of the end portion is higher than the height of the end portion close to the horizontal milling edge (32), and the central angle a of the concave arc ranges from 120 degrees to 150 degrees.
2. A hole forming tool according to claim 1, characterized in that the cutting edge portion (1), the first chamfer drilling portion (2), the convex annular machining portion (3) are provided with chip flutes (5) extending to the shank portion (4).
3. A hole forming tool as claimed in claim 1, characterised in that a radius between the concave arc and the horizontal milling edge (32) is provided, which radius is smaller than the radius of the concave arc.
4. A hole forming tool according to any of claims 1-3, wherein the central angle a is 135 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120602291.7U CN214769184U (en) | 2021-03-23 | 2021-03-23 | Hole forming cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120602291.7U CN214769184U (en) | 2021-03-23 | 2021-03-23 | Hole forming cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214769184U true CN214769184U (en) | 2021-11-19 |
Family
ID=78666829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120602291.7U Active CN214769184U (en) | 2021-03-23 | 2021-03-23 | Hole forming cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214769184U (en) |
-
2021
- 2021-03-23 CN CN202120602291.7U patent/CN214769184U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |