CN219648777U - High-efficiency composite napping drill bit - Google Patents
High-efficiency composite napping drill bit Download PDFInfo
- Publication number
- CN219648777U CN219648777U CN202320284874.9U CN202320284874U CN219648777U CN 219648777 U CN219648777 U CN 219648777U CN 202320284874 U CN202320284874 U CN 202320284874U CN 219648777 U CN219648777 U CN 219648777U
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- Prior art keywords
- tip
- cutting edge
- diameter
- rivet hole
- drill bit
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- 239000002131 composite material Substances 0.000 title claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 27
- 238000003754 machining Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000000110 cooling liquid Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000003746 surface roughness Effects 0.000 abstract description 3
- 238000007788 roughening Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Drilling Tools (AREA)
Abstract
The utility model relates to a high-efficiency composite roughening drill bit, which solves the problems of overhigh surface roughness cost and low efficiency of machining deep oil holes and rivet holes in the prior art. A high-efficiency composite napping drill bit comprises a first tip, a second tip, a cutter bar and a cutter handle which are sequentially connected; a circumferential triangular cutting edge is arranged on the side wall of the front end of the second tip, and a tip fillet R is arranged at the bottom of the triangular cutting edge; the first tip and the second tip are provided with at least two successive flutes. Further, an internal cooling channel is arranged in the cutter handle, so that cooling liquid passes through the internal cooling channel to reach working positions of the first tip and the second tip.
Description
Technical Field
The utility model relates to a hole machining device, in particular to a high-efficiency composite napping drill bit.
Background
At present, in the in-process of processing preparation rivet hole, the surface in rivet hole needs to satisfy the roughness requirement of certain scope, need use single-edge boring cutter and match with certain rotational speed and feed just can reach ideal effect, and single-edge cutter blade processing pressure is big, and easy wearing and tearing causes the processing cost on rivet hole surface higher, needs to adopt multiple cutter processing in the in-process of processing deep and long oilhole and rivet hole simultaneously, also can increase the processing duration when having increased processing cost, and overall efficiency is low.
The rivet hole to be processed is shown in fig. 1, wherein D1 is the diameter of the deep and long oil hole, D2 is the diameter of the rivet hole, H1 is the depth of the deep and long oil hole, H1/D1 is more than or equal to 5, H2 is the depth of the rivet hole, ra is the surface roughness of the rivet hole and is generally 3.2-12.5, and beta is the chamfering angle of the orifice of the rivet hole.
Chinese patent publication No. CN217096592U discloses a workpiece drilling device, in which the machining and drilling can be completed only after replacing the tool multiple times.
Disclosure of Invention
The utility model provides a high-efficiency composite roughening drill bit which is used for solving the problems that the surface roughness cost of a rivet hole is too high and the efficiency of machining deep and long oil holes and the rivet hole is too low at present.
In order to achieve the above object, the technical scheme of the present utility model is as follows:
the utility model provides a high-efficient compound napping drill bit which is characterized in that: the cutter comprises a first tip, a second tip, a cutter bar and a cutter handle which are sequentially connected from front to back; the first tip is used for machining a guide hole of the deep and long oil hole, and the second tip is used for machining a rivet hole;
the side wall of the front end of the second tip is provided with a circumferential triangular cutting edge, and the cutting tip of the triangular cutting edge is provided with a cutting tip fillet R; the triangular cutting edge is used for machining the roughness required by the inner wall of the rivet hole;
the first tip and the second tip are respectively provided with at least two spiral chip grooves, and each chip groove of the first tip is communicated with the chip groove of the second tip in a one-to-one correspondence manner;
and also the following conditions need to be satisfied:
d1-d1=0.01 to 0.03mm; d2 =d2; l1 is more than or equal to D1 mm; H2-L2 is more than or equal to 0.1mm; d5 is less than or equal to d2-0.5mm; d3 is larger than the maximum diameter of the chamfer of the orifice of the rivet hole;
wherein, D1 is the diameter of the deep and long oil hole, D2 is the diameter of the rivet hole, H2 is the rivet hole depth, D1 is the diameter of the first tip, D2 is the distance between the tips of the triangular cutting edges at two opposite positions, D3 is the diameter of the cutter bar, D5 is the diameter of the second tip, L1 is the length of the first tip, and L2 is the length of the second tip.
Further, an internal cooling channel is arranged in the cutter handle, so that cooling liquid passes through the internal cooling channel to reach working positions of the first tip and the second tip.
Further, an included angle alpha=10-150 degrees of the triangular cutting edge on the side face of the front end of the second tip, a chamfer angle beta=0-150 degrees of the orifice of the rivet hole, a helix angle gamma=0-50 degrees of the chip groove of the first tip and the second tip, gamma is an included angle between an outer diameter cutting edge spiral line of the chip groove and the central axis of the drill, and a cutting edge fillet R=0.1-2 of the triangular cutting edge.
Further, d1-d1=0.02 mm; α=30°; beta = 90 °; γ=30°; r=2.
Further, in the process of machining the roughness Ra of the inner wall of the rivet hole by the drill, the feeding amount fz of each tooth of the second tip (3) and the roughness Ra meet the following relation: ra. Apprxeq. Fz 2 /32R。
Compared with the prior art, the utility model has the following beneficial effects:
the utility model combines the processing cutters for processing the deep and long oil holes and the rivet holes to form an integral drill bit, reduces the number of the cutters and reduces the cutter changing and idle stroke time.
The drill bit provided by the utility model adopts reasonable cutting parameters when in use, so that the guide hole and the rivet hole of the deep and long oil hole can be formed at one time, the processing efficiency is high, and the cost is reduced.
Drawings
FIG. 1 is a schematic view of deep and long oil holes and rivet hole machining sites;
FIG. 2 is a schematic view of the structure of the high efficiency composite drill bit of the present utility model;
fig. 3 is a partial enlarged view at a in fig. 2.
Wherein the drawings are as follows:
01. deep long oil hole, 02, rivet hole.
1. The cutter bar, 2, the first pointed end, 3, the second pointed end, 4, the handle of a knife, 41, interior cold passageway, 5, triangle blade.
Detailed Description
The utility model is further described with reference to the drawings and detailed description.
A high-efficiency composite napping drill bit is shown in fig. 2, and comprises a cutter handle 4, a cutter bar 1, a second tip 3 and a first tip 2 which are sequentially connected. The first tip 2 and the second tip 3 are provided with two continuous chip grooves in a twist shape, the outer diameter and the inner diameter of each chip groove are relatively parallel spiral lines, the side face of the front end of the second tip 3 is provided with a triangular cutting edge 5 shown in fig. 3, and the triangular cutting edge 5 surrounds a circle on the side wall of the front end of the second tip 5. The first tip 2 is used for machining a guide hole of the deep and long oil hole 01, and the second tip 3 is used for machining a rivet hole 02. Wherein d1 is the diameter of a first tip 2 corresponding to a guide hole of the deep and long oil hole 01, d2 is the distance between two opposite triangular cutting edges 5, d3 is the diameter of a cutter bar 1, d4 is the diameter of a cutter handle 4, d5 is the diameter of a second tip 3, L1 is the length of the first tip 2, L2 is the length of the second tip 3, L3 is the length of the cutter handle 4, L4 is the total length of a drill bit, alpha is the included angle of the triangular cutting edges 5 on the front end side surface of the second tip 3, beta is the chamfering angle of the orifice of the rivet hole, gamma is the helix angle of the drill bit on the first tip 2 and the second tip 3, and R is the tip fillet of the triangular cutting edges 5.
During the manufacturing process, the drill bit needs to meet the following conditions:
1) d1-d1=0.01 to 0.03, preferably d1-d1=0.02, ensures that the diameter of the first tip 2 is slightly larger than the diameter of the deep and long oil hole 01, and can be guided effectively.
2) L1 is more than or equal to 1 xD 1, namely the length of the first tip 2 is least longer than one time of the aperture of the deep and long oil hole 01, and the machining of the deep and long oil hole 01 can be effectively guided.
3)d2＝D2。
4) H2-L2 is more than or equal to 0.1, effective chamfering is carried out when the rivet hole 02 has chamfering requirements, chamfering is carried out at least 0.1 when no chamfering is carried out, and burrs on sharp edges of the orifice can be removed.
5) d3 is larger than the maximum diameter of the chamfer of the orifice of the rivet hole 02, and the complete chamfer can be effectively machined during machining.
6)d5≤d2-0.5。
7) Alpha=10° to 150 °, preferably 30 °, and is determined according to the difference between the diameter of the deep and long oil hole 01 and the diameter of the rivet hole 02, the roughness Ra of the inner surface of the rivet hole 02, and the machining efficiency requirement.
8) Beta=0° to 150 °, preferably 90 °, specifically depending on the chamfering requirement of the orifice of the rivet hole 02, and when 0 °, chamfering is generally not required, and chamfering and deburring can be performed.
9) Gamma = 0-50 °, wherein is preferably 30 °, specifically determined according to the machined part material and the tool diameter, gamma is the angle between the outer diameter cutting edge spiral of the junk slots on the first tip 2 and the second tip 3 and the central axis of the drill, and when 0 °, the junk slots are straight slots, and the machining can still be continued.
10 R=0.1 to 2, wherein 2 is preferable, and is specifically determined according to the difference between the diameter of the deep and long oil holes 01 and the diameter of the rivet holes 02, the roughness Ra of the inner surface of the rivet holes 02 and the machining efficiency requirement.
When the drill bit is used for processing, a cooling liquid is input into an internal cooling channel 41 in the cutter handle 4, the cooling liquid enters working parts of a first tip 2 and a second tip 3 through the internal cooling channel 41, the first tip 2 is used for processing a guide hole corresponding to a deep oil hole 01, namely, a pre-drilling deep oil hole 01 is performed, when the drilling depth of the first tip 2 reaches L1, a triangular blade 5 for processing the roughness of the inner wall of a rivet hole 02 on the second tip 3 starts to work, the cutting width is (D2-D1)/2, the diameter D2 of the rivet hole 02 is ensured, meanwhile, the required roughness Ra of the inner wall of the rivet hole 02 is ensured, and when Ra does not meet the requirement, the rotating speed and the feeding speed of the drill bit are adjusted, and Ra is generally equal to Rz/4 equal to fz 2 The machined roughness is accurately estimated by/32R, fz being the feed per tooth of the second tip 3. The length of the rivet hole is L2 until the machined roughness, at this time, the guide hole of the deep and long oil hole 01 and the rivet hole 02 are machined at one time, and the roughness of the inner wall of the rivet hole 02 is matchedAnd the requirements are met. Finally, setting chamfering of the orifice of the rivet hole 02 and finish machining of the deep and long oil hole 02 are finished.
The tool bit is clamped by the tool shank clamping component with high precision, large clamping force, high clamping precision and good dynamic balance during machining, after the length and the diameter of a tool are measured on the tool setting gauge, parts are stably drilled under the conditions of reasonable rotating speed, feeding speed and internal cooling, and the parts are rapidly withdrawn after reaching a preset depth, so that machining is completed.
Claims (5)
1. The utility model provides a high-efficient compound napping drill bit which characterized in that: comprises a first tip (2), a second tip (3), a cutter bar (1) and a cutter handle (4) which are sequentially connected from front to back; the first tip (2) is used for machining a guide hole of the deep and long oil hole (01), and the second tip (3) is used for machining a rivet hole (02);
a circumferential triangular cutting edge (5) is arranged on the side wall of the front end of the second tip (3), and a tip fillet R is arranged at the tip of the triangular cutting edge (5); the triangular cutting edge (5) is used for processing the roughness required by the inner wall of the rivet hole (02);
the first tip (2) and the second tip (3) are respectively provided with at least two spiral chip grooves, and each chip groove of the first tip (2) is communicated with the chip groove of the second tip (3) in a one-to-one correspondence manner;
and also the following conditions need to be satisfied:
d1-d1=0.01 to 0.03mm; d2 =d2; l1 is more than or equal to D1 mm; H2-L2 is more than or equal to 0.1mm; d5 is less than or equal to d2-0.5mm; d3 is larger than the maximum diameter of the chamfer of the orifice of the rivet hole;
wherein, D1 is the diameter of deep and long oilhole, D2 is the diameter of rivet hole, H2 is rivet hole degree of depth, D1 is the diameter of first pointed end (2), D2 is the distance between the three angle blade (5) cutting edge of two relative positions, D3 is the diameter of cutter arbor (1), D5 is the diameter of second pointed end (3), L1 is the length of first pointed end (2), L2 is the length of second pointed end (3).
2. The high efficiency composite galling drill bit according to claim 1, wherein: an internal cooling channel (41) is arranged in the knife handle (4) so that cooling liquid passes through the internal cooling channel to reach working positions of the first tip (2) and the second tip (3).
3. A high efficiency composite galling drill bit according to claim 2, wherein: the included angle alpha of the triangular cutting edge (5) on the front end side surface of the second tip (3) is 10-150 degrees, the chamfer angle beta of the rivet hole orifice is 0-150 degrees, the helix angle gamma of the chip groove of the first tip (2) and the second tip (3) is 0-50 degrees, gamma is the included angle between the outer diameter cutting edge spiral line of the chip groove and the central axis of the drill, and the tip fillet R of the triangular cutting edge (5) is 0.1-2.
4. A high efficiency composite galling drill bit according to claim 3, wherein: d1-d1=0.02 mm; α=30°; beta = 90 °; γ=30°; r=2.
5. A high efficiency composite galling drill bit according to any one of claims 1-4, wherein: in the process of machining the roughness Ra of the inner wall of the rivet hole by the drill, the following relation is satisfied between the feeding quantity fz of each tooth of the second tip (3) and the roughness Ra:
Ra≈fz 2 /32R。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320284874.9U CN219648777U (en) | 2023-02-22 | 2023-02-22 | High-efficiency composite napping drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320284874.9U CN219648777U (en) | 2023-02-22 | 2023-02-22 | High-efficiency composite napping drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219648777U true CN219648777U (en) | 2023-09-08 |
Family
ID=87856726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320284874.9U Active CN219648777U (en) | 2023-02-22 | 2023-02-22 | High-efficiency composite napping drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219648777U (en) |
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2023
- 2023-02-22 CN CN202320284874.9U patent/CN219648777U/en active Active
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