CN210254407U - Multi-blade tip-scale serrate drilling and milling composite cutter - Google Patents
Multi-blade tip-scale serrate drilling and milling composite cutter Download PDFInfo
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- CN210254407U CN210254407U CN201920554811.4U CN201920554811U CN210254407U CN 210254407 U CN210254407 U CN 210254407U CN 201920554811 U CN201920554811 U CN 201920554811U CN 210254407 U CN210254407 U CN 210254407U
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Abstract
The utility model provides a multi-blade point-fish scale thin-tooth-shaped drilling and milling composite cutter, which is used for processing carbon fiber composite materials and comprises a drill bit part, a milling cutter part and a cutter handle, wherein two first spiral grooves with the same rotation direction are processed on the outer circumferential surface of the drill bit part along the axial direction; the milling cutter part is formed by scale serrations formed by second left and right spiral grooves which are spirally staggered left and right, the inclination angles of the second left and right spiral grooves which are spirally staggered left and right gradually increase from the joint of the drill bit part and the milling cutter part to the joint of the milling cutter part and the cutter handle, and the intervals of the second left and right spiral grooves which are spirally staggered left and right are different; each scale serration comprises a left helical blade and a right helical blade. The utility model discloses can effectual reduction in the course of working the axis power, reduce cutting output and cutting force to reduce the system hole defect, improve machining efficiency, processingquality.
Description
Technical Field
The utility model belongs to the technical field of drilling, spiral mill compound hole-making instrument, in particular to a multiple-blade point-fish scale serration form drilling and milling compound tool for processing carbon-fibre composite.
Background
The carbon fiber reinforced composite material (CFRP) has wide application prospect in the high and new technical field of aerospace due to excellent specific strength, specific modulus and other properties. At present, CFRP is mostly processed by adopting drilling-expanding-reaming-countersinking multi-cutter multi-process hole making in the hole making process, so that the hole making process is complicated, the hole making efficiency is low, and due to the characteristics of anisotropy, poor interlayer connection strength and the like of CFRP, the surface layer materials on the outlet side and the inlet side of the hole are easy to generate processing defects such as layering, burr, tearing and the like, and the defects seriously restrict the popularization and application of CFRP materials in high-end products in the aerospace field. In order to reduce the hole making defect and improve the hole making efficiency as much as possible, a process of spirally making holes can be carried out by adopting a drilling-milling composite cutter according to the principle of integrated hole making. The process drills the base hole in advance before the spiral hole milling, not only can utilize the characteristics of high efficiency and high removal rate of drilling, but also can ensure that the integral thrust of the bottom edge of the cutter to the surface layer material is avoided in the spiral hole milling. Meanwhile, the cutting amount and the cutting force are greatly reduced in the spiral milled hole, the new defects are not generated in the spiral milled hole, and the process effect of completely removing the defects is achieved. Therefore, in order to realize the purpose of combining the drilling-milling composite cutter with an ideal drilling-milling composite spiral hole making technology, a drilling-milling integrated cutter matched with the process must be designed.
The utility model discloses a drill bit with straight blade type blade for CFRP, which is characterized in that two spiral grooves with the same rotation direction are axially processed on the outer circumferential surface of a drill bit main body, and the two spiral grooves are respectively and sequentially connected with the straight blade type blade with a drilling tip part, a reaming part, a multi-blade tip part and an inclination reaming part at the head part of the drill bit main body; the two cutting edges at the drilling tip part are connected through the chisel edge. Although the drill bit can perform cutting processing to obtain a certain hole making effect, the drilling-milling composite spiral hole making technology cannot be realized.
The utility model discloses a chinese utility model patent of grant publication number CN 202715874U discloses a little tooth milling cutter of fish scale type, constitute by cutter and stalk portion, the cutter adopts two tooth end mill structures, the helix angle is 5, the cutter front end adopts the awl point structure and opens the relief angle, the end sword is opened the end tooth, the first relief angle of end sword is 10 ~ 14, the second relief angle of end sword is 25 ~ 30, open the staggered toothlet of left and right spiral at end mill's circumference, the helix angle is 30 ~ 40, it is 1 to take left and right sides to revolve the number of teeth difference when opening the crisscross toothlet of left and right spiral on the circumference, the tooth space angle is 45 ~ 60, the toothlet anterior angle on the circumference sword is 3 ~ 8 although this milling cutter can carry out milling process, obtain certain milling effect, but can't realize boring-milling compound spiral drilling technique.
SUMMERY OF THE UTILITY MODEL
To current system hole cutter be difficult to avoid burr, layering and because multitool, multiple operation make the problem that machining efficiency is low, the utility model aims at providing a multiple-blade point-the thin cusp of fish scale bores and mills combined tool for processing carbon fiber reinforced composite to solve easy layering, the numerous and diverse scheduling problem of burr and manufacturing procedure in the carbon fiber reinforced composite drilling process, thereby improve carbon fiber reinforced composite system hole processingquality and production efficiency.
The utility model adopts the technical proposal that:
a multi-edge tip-fish scale thin-tooth-shaped drilling and milling composite cutter is used for processing carbon fiber composite materials and comprises a drill bit part, a milling cutter part and a cutter handle, wherein the milling cutter part is positioned between the drill bit part and the cutter handle; the milling cutter part is formed by scale serrations formed by second left spiral grooves and second right spiral grooves which are spirally staggered left and right, the inclination angles of the second left spiral grooves and the second right spiral grooves which are spirally staggered left and right gradually increase from the joint of the drilling head part and the milling cutter part to the joint of the milling cutter part and the cutter handle, and the distances between the second left spiral grooves and the second right spiral grooves which are spirally staggered left and right are different; each scale serration comprises a left helical blade and a right helical blade.
In a preferred embodiment of the present invention, each cutting edge is formed by connecting a drill point blade, a hole expanding blade, a drill point back blade and a small-inclination hole expanding blade in sequence, the drill point blades in the two cutting edges intersect to form a first cutter point, the drill point blade and the hole expanding blade intersect to form a second cutter point, the drill point back blade and the small-inclination hole expanding blade intersect to form a third cutter point.
In a preferred embodiment of the present invention, the included angle between the drill point edge and the drill bit axis is 55 ° to 60 °, the included angle between the reaming edge and the drill bit axis is 7 ° to 10 °, the included angle between the drill point trailing edge and the drill bit axis is 60 ° to 65 °, and the included angle between the small-inclination reaming edge and the drill bit axis is 3 ° to 5 °
In a preferred embodiment of the present invention, the width of the chisel edge is 0.5-1.5 mm, and the angle of inclination of the chisel edge is 50-60 °.
In a preferred embodiment of the invention, the angle of inclination of the second left helical flute gradually increases from the initial 40 ° close to the drill portion to the terminal 45 ° close to the shank, and the angle of inclination of the second right helical flute gradually increases from the initial 5 ° close to the drill portion to the terminal 10 ° close to the shank.
In a preferred embodiment of the present invention, the second left spiral groove pitch is 1-1.5 mm, and the second right spiral groove pitch is 1-1.2 mm.
In a preferred embodiment of the present invention, the normal clearance angle of the tips of the scale serrations is 10 ° to 15 °, and the normal rake angle is 5 ° to 15 °.
In a preferred embodiment of the utility model, the tooth height of fish scale serration is 0.4 ~ 0.8mm, and the chip pocket radius is 0.1 ~ 0.2 mm.
In a preferred embodiment of the present invention, the drill portion and the milling cutter portion are an integral structure and made of hard alloy.
In a preferred embodiment of the present invention, the surfaces of the drill portion and the milling cutter portion are coated with a wear-resistant material layer.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a be equipped with two first helicla flutes on the drill bit part outer peripheral face, can discharge the smear metal smoothly at the drilling in-process.
2. The utility model discloses a drill bit part is an overall structure with milling cutter part, adopts carbide to make or has plated the one deck wearing material layer on the surface of drill bit part and milling cutter part, can reduce the cutting force, improves cutter wear resistance, has improved the system hole quality.
3. The utility model discloses a drill bit part contains two axial symmetry cutting edges, restraines the production of burr, layering, reduces drilling system hole defect.
4. The milling cutter of the utility model is composed of scale serrations formed by a second left spiral groove and a second right spiral groove which are staggered in a left-right spiral manner, after the drilling of the drill bit part is completed, the spiral milling is carried out, a left spiral blade forms an axial downward pressing force on the surface layer material at the hole inlet, and the uncut material in the surface layer material is pressed, fixed and sheared; the right spiral blade forms an axial upward pressing force on the surface layer material of the hole outlet, and the defects of layering and tearing caused by downward axial force on the material can be effectively avoided.
5. The utility model discloses a drilling earlier the base hole back spiral hole milling's integration system hole technology can utilize high-efficient, the high clearance characteristic of drilling, can ensure again to avoid the whole thrust of cutter bottom edge to the surface layer material in spiral hole milling. Meanwhile, the cutting amount and the cutting force are greatly reduced in the spiral milled holes, new defects are not generated in the spiral milled holes, and hole making defects generated in the drilling process are further removed on the basis of not generating the new defects.
Drawings
Fig. 1 is a structural diagram of the present invention.
Fig. 2 is a block diagram of the drill portion i of fig. 1.
Fig. 3 is a view in the direction of C in fig. 1.
Fig. 4 is a block diagram of a milling cutter part ii of fig. 1.
Fig. 5 is a schematic structural view of fish scale serrations.
Fig. 6 is a sectional view a-a of fig. 4.
Fig. 7 is a sectional view B-B of fig. 4.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 3, the utility model discloses a handle of a knife III locates the milling cutter part II of the III one ends of handle of a knife to and locate the drill bit part I of the II outer ends of milling cutter part.
Two first spiral grooves (not shown in the figure) are axially machined on the outer circumferential surface of the drill bit part I, the rotating directions of the two first spiral grooves are the same, and chips can be smoothly discharged in the drilling process.
The drill part I is provided with a plurality of tool noses, the plurality of tool noses are formed by two axially symmetrical cutting edges, and the two cutting edges are connected through a cross edge 5.
Each cutting edge is sequentially connected with a drill point blade 1, a reaming blade 2, a drill point rear blade 3 and a small-inclination reaming blade 4, the drill point blades 1 in the two cutting edges are intersected to form a first tool nose 8, the drill point blades 1 and the reaming blades 2 are intersected to form a second tool nose 9, and the drill point rear blade 3 and the small-inclination reaming blade 4 are intersected to form a third tool nose 10.
The included angle α between the drill point edge 1 and the axis of the drill part I is between 55 and 60 degrees, the included angle β between the reaming edge 2 and the axis of the drill part I is between 14 and 20 degrees, the included angle gamma between the drill point back edge 3 and the axis of the drill part I is between 60 and 65 degrees, the included angle delta between the small-inclination reaming 1 and the axis of the drill part I is between 5 and 10 degrees, the width t of the chisel edge 5 is 0.5 to 1.5mm, and the inclination angle zeta of the chisel edge 5 is between 50 and 60 degrees.
As shown in fig. 4 to 7, the milling cutter portion ii is formed by fish scale serrations 11 formed by left and right spirally staggered second left helical grooves (not shown) and second right helical grooves (not shown), the inclination angle θ of which is1Gradually increases from the initial 40 degrees close to the drill bit part I to the end 45 degrees close to the cutter shank III, and the inclination angle theta of the second right spiral groove2Gradually increasing from 5 near the drill portion i to 10 near the shank iii. Distance L of second left helical groove11-1.5 mm, and the distance L between the second right spiral groove and the second right spiral groove21 to 1.2 mm.
The maximum radius r of the chip groove is 0.1-0.2 mm, a chip removal space is ensured, the left spiral groove has a chip separation function, and chips are easier to discharge by matching with the right spiral groove.
Each scale serration 11 is provided with a left spiral blade 6 and a right spiral blade 7, the milling area is greatly reduced due to the scale serration 11, the cutting force is further reduced, the tooth height h of the scale serration 11 is 0.45-0.6 mm, and the normal back angle α of the tooth tip0Is 10-15 degrees and the normal front angle gamma0Is 5-15 degrees, and can effectively reduce cutting force.
The utility model discloses a drill bit part I is an overall structure with milling cutter part II, adopts carbide to make or has plated the one deck wearing material layer at the surface of drill bit part I and milling cutter part II, can reduce the cutting force, improves cutter wear resistance, has improved the system hole quality.
Claims (10)
1. A multi-edge tip-fish scale thin-tooth-shaped drilling and milling composite tool is used for processing carbon fiber reinforced composite materials and comprises a drill bit part, a milling cutter part and a tool shank, wherein the milling cutter part is positioned between the drill bit part and the tool shank; the milling cutter part is formed by scale serrations formed by second left spiral grooves and second right spiral grooves which are spirally staggered left and right, the inclination angles of the second left spiral grooves and the second right spiral grooves which are spirally staggered left and right gradually increase from the joint of the drilling head part and the milling cutter part to the joint of the milling cutter part and the cutter handle, and the distances between the second left spiral grooves and the second right spiral grooves which are spirally staggered left and right are different; each scale serration comprises a left helical blade and a right helical blade.
2. The multi-blade point-fish scale serration type drilling and milling composite tool as claimed in claim 1, wherein each cutting edge is formed by sequentially connecting a drilling tip edge, a reaming edge, a drilling tip back edge and a small-inclination reaming edge, the drilling tip edge of the two cutting edges meets to form a first tool tip, the drilling tip edge meets to form a second tool tip, and the drilling tip back edge meets to form a third tool tip.
3. The multi-edge tip-fish scale serration-shaped drilling and milling composite tool as claimed in claim 2, wherein the included angle between the drill tip edge and the axis of the drill bit part is 55 ° to 60 °, the included angle between the reaming edge and the axis of the drill bit part is 7 ° to 10 °, the included angle between the drill tip back edge and the axis of the drill bit part is 60 ° to 65 °, and the included angle between the reaming edge with a small inclination angle and the axis of the drill bit part is 3 ° to 5 °.
4. The multi-blade point-fish scale serration drilling and milling composite tool as claimed in claim 1, wherein the width of the chisel edge is 0.5-1.5 mm, and the angle of inclination of the chisel edge is 50-60 °.
5. The multi-cutting-edge tip-scale serration-like drilling and milling composite tool as claimed in claim 1, wherein the inclination angle of the second left helical flute gradually increases from the initial 40 ° near the drill portion to 45 ° near the distal end of the shank, and the inclination angle of the second right helical flute gradually increases from the initial 5 ° near the drill portion to 10 ° near the distal end of the shank.
6. The multi-blade point-fish scale serration drilling and milling composite tool as claimed in claim 5, wherein the pitch of the second left spiral groove is 1-1.5 mm, and the pitch of the second right spiral groove is 1-1.2 mm.
7. The compound multi-edge point-fish scale serration drilling and milling tool as claimed in claim 1, wherein the normal clearance angle of the fish scale serration is 10 ° to 15 °, and the normal rake angle is 5 ° to 15 °.
8. The compound multi-blade point-scale serration drilling and milling tool as claimed in claim 7, wherein the height of the scale serration is 0.4-0.8 mm, and the radius of the chip pocket is 0.1-0.2 mm.
9. The compound multi-blade point-scale serration drilling and milling tool as claimed in claim 1, wherein said drill portion and said milling cutter portion are of a unitary construction and are made of cemented carbide.
10. The compound multi-edged tip-scale serration drilling and milling tool as claimed in claim 1, wherein the surfaces of the drill portion and the milling cutter portion are coated with a wear-resistant material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920554811.4U CN210254407U (en) | 2019-04-23 | 2019-04-23 | Multi-blade tip-scale serrate drilling and milling composite cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920554811.4U CN210254407U (en) | 2019-04-23 | 2019-04-23 | Multi-blade tip-scale serrate drilling and milling composite cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210254407U true CN210254407U (en) | 2020-04-07 |
Family
ID=70022704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920554811.4U Expired - Fee Related CN210254407U (en) | 2019-04-23 | 2019-04-23 | Multi-blade tip-scale serrate drilling and milling composite cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210254407U (en) |
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2019
- 2019-04-23 CN CN201920554811.4U patent/CN210254407U/en not_active Expired - Fee Related
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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: 20200407 Termination date: 20210423 |
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| CF01 | Termination of patent right due to non-payment of annual fee |