CN210254406U - Linear type three-point-fine tooth-shaped drilling and milling composite cutter - Google Patents
Linear type three-point-fine tooth-shaped drilling and milling composite cutter Download PDFInfo
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- CN210254406U CN210254406U CN201920554790.6U CN201920554790U CN210254406U CN 210254406 U CN210254406 U CN 210254406U CN 201920554790 U CN201920554790 U CN 201920554790U CN 210254406 U CN210254406 U CN 210254406U
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Abstract
The utility model provides a linear type tricuspid-fine tooth-shaped drilling and milling composite tool, which is used for processing carbon fiber reinforced composite materials and comprises a drill bit part, a milling cutter part and a tool handle, wherein the drill bit part comprises two axially symmetrical cutting edges, each cutting edge is formed by sequentially connecting a drill point blade, a hole expanding blade, a drill point rear blade and a small-inclination-angle hole expanding blade, and the drill point blades of the two cutting edges are connected through a cross blade; the milling cutter part contains 4 ~ 6 right spiral sword, and evenly distributed has a plurality of chip breakers of the unanimous degree of depth on every right spiral sword, and a plurality of chip breakers will every right spiral sword even divide into a plurality of toothings, and each chip breaker is the right spiral contained angle with milling cutter part axis, and this right spiral contained angle is greater than the helix angle of right spiral sword. The utility model discloses axial force in can effectual reduction course of working, reduction spiral milling hole cutting output and cutting force to show to reduce or thoroughly get rid of the system hole defect, improve machining efficiency and processingquality.
Description
Technical Field
The utility model belongs to the technical field of drilling, spiral mill compound hole-making instrument, in particular to a linear type tricuspid-serration form bores and mills combined cutting tool for processing carbon fiber reinforced 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. During assembly and connection, a large number of holes with the diameter d being more than or equal to 6mm need to be processed in a large quantity. At present, the processing of the holes is usually carried out by adopting a multi-cutter and multi-procedure hole making process of drilling, expanding, reaming and countersinking, but the procedures are complicated, the efficiency is low, particularly, the defects of serious burrs, tearing, layering and the like are easily generated in a surface layer material, and the application of CFRP in aerospace is seriously hindered. Research shows that the base hole is drilled first and then is reamed by adopting spiral milling. 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. In order to reduce the hole making defect and improve the hole making efficiency as much as possible, the hole making process of drilling and spiral milling by adopting a drilling-milling composite cutter is provided according to the principle of integrated hole making. Therefore, in order to realize an ideal drilling-milling composite spiral hole making technology, a drilling-milling integrated composite cutter matched with the technology needs to 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 that the grant bulletin number is CN 204686148U discloses a rhombus sword shape carbide milling cutter for combined material, and the end sword that the terminal surface of tool bit was arranged is seven sword structures, and this seven sword structures have chip removal groove structure each other, the side of tool bit has the periphery sword of spiral formation, and this periphery sword is twelve sword structures, has the groove structure of levogyration flute shape between each cutting part in this twelve sword structures, and this groove structure extends to the terminal surface outer fringe of tool bit, and this periphery sword has and passes each cutting part and forms the dextrorotation groove structure of controlling helicla flute cross structure with the groove structure of levogyration flute shape. Although the milling cutter can perform milling processing to obtain a certain hole making effect, the drilling-milling composite spiral hole making technology cannot be realized.
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 linear type tricuspid-serration form bores and mills combined tool for processing carbon fiber reinforced composite to solve the easy burr, the layering problem that produce of carbon fiber reinforced composite drilling in-process, and the numerous and diverse scheduling problem of manufacturing procedure, thereby improve carbon fiber reinforced composite system hole processingquality and production efficiency.
The utility model adopts the technical proposal that:
a linear type three-point-fine-tooth-shaped drilling and milling composite cutter is used for processing carbon fiber reinforced 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; two small-inclination-angle spiral grooves with the same rotation direction are axially arranged on the outer circumferential surface of the drill bit part, a main spiral groove is arranged on the milling cutter part, and the two small-inclination-angle spiral grooves are connected with the main spiral groove; the drill part comprises two axially symmetrical cutting edges, each cutting edge is formed by sequentially connecting a drill point edge, a hole expanding edge, a drill point back edge and a small-inclination-angle hole expanding edge, and the drill point edges of the two cutting edges are connected through a chisel edge; the milling cutter part comprises 4-6 right spiral blades, a plurality of chip breakers with the same depth are uniformly distributed on each right spiral blade, each right spiral blade is uniformly divided into a plurality of thin teeth by the plurality of chip breakers, a right spiral included angle is formed between each chip breaker and the axis of the milling cutter part, and the right spiral included angle is larger than the spiral angle of the right spiral blade.
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 14 ° to 20 °, the included angle between the drill point trailing edge and the drill bit axis is 60 ° to 85 °, and the included angle between the reaming edge with small inclination angle and the drill bit axis is 7 ° to 10 °.
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 present invention, an included angle between the chip breaker groove of the milling cutter portion and the axis of the milling cutter portion is 60 ° to 65 °, and a helix angle of the right-handed helical edge is 5 ° to 10 °.
In a preferred embodiment of the utility model, the interval between the adjacent chip breaker is 1.2 ~ 1.5mm, and the interval of adjacent right spiral sword is 1.5 ~ 2.5 mm.
In a preferred embodiment of the present invention, the normal back angle of the serration is 10 ° to 15 °, the normal front angle is 5 ° to 15 °, the serration tooth height is 0.45 mm to 0.6mm, and the maximum radius of the chip pocket of the serration is 0.18 mm to 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 cemented carbide.
In a preferred embodiment of the present invention, the drill portion and the milling cutter portion are coated with a layer of wear-resistant material on their surfaces.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a be equipped with two small inclination helicla flutes on the drill bit part outer peripheral surface, can discharge the smear metal smoothly at the drilling process.
2. The utility model discloses a drill bit part is an overall structure with milling cutter part, adopts carbide to make or can plate one deck wearing material layer, 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, and through the system hole effect of periodic deburring, layering, reduces drilling system hole defect.
4. The utility model discloses milling cutter part contains 4 ~ 6 right spiral sword, and evenly distributed is being by a plurality of chip breakers on every right spiral sword. After the drill bit is drilled partially, the hole is milled spirally, the right spiral blade has a small right inclination angle, the surface layer of the hole outlet can form upward pressing force in the axial direction, and the included angle between the chip breaker groove and the axis of the cutter is a large right inclination angle, so that uncut materials in the surface layer material of the hole outlet can be pulled into the inner side of the hole, and the uncut fibers are sheared. Therefore, the right spiral cutter toothed belt can effectively inhibit the generation of hole-making defects. In addition, the milling area is greatly reduced, the axial force is greatly reduced, and the chip removal and heat dissipation conditions are improved.
5. The utility model discloses the contained angle of the right spiral sword inclination of milling cutter part and chip breaker and milling cutter part axis all is the increase trend from being close to the drill bit part to the shank portion, and chip removal and holding bits condition increase and improve along with the smear metal, have improved the cutting performance of milling cutter part greatly.
6. 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 view of the present invention.
Fig. 2 is a structural view of the drill bit section i.
Fig. 3 is a view in the direction C of fig. 1.
Fig. 4 is a structural diagram of a milling cutter part ii of the present invention.
Fig. 5 is a schematic view of a configuration of serrations.
Fig. 6 is a sectional view a-a of fig. 4.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 6, the linear type three-point-fine-tooth drilling and milling composite tool for processing carbon fiber reinforced composite materials comprises a drill part i, a milling cutter part ii and a tool shank iii, wherein the milling cutter part ii is located between the drill part i and the tool shank iii.
Two spiral grooves (not shown in the figure) with the same rotation direction and small inclination angles are axially arranged on the outer circumferential surface of the drill bit part I, and a main spiral groove is arranged on the milling cutter part II and is connected with the two spiral grooves with the small inclination angles.
Drill bit part II contains two axial symmetry's cutting edge, and every cutting edge connects gradually by drill point sword 1, reaming sword 2, drill point back sword 2 and small inclination reaming sword 4 and forms, and drill point sword 1 in two cutting edges passes through chisel edge 5 and connects.
The included angle α between the drill point edge 1 and the axis of the drill part I is 55-60 degrees, the included angle β between the reaming edge 2 and the axis of the drill part I is 14-20 degrees, the included angle gamma between the drill point back edge 2 and the axis of the drill part I is 60-85 degrees, the included angle delta between the small-inclination reaming edge 1 and the axis of the drill part I is 5-10 degrees, the width t of the chisel edge 5 is 0.5-1.5 mm, and the inclination angle zeta of the chisel edge 5 is 50-60 degrees.
The milling cutter part II comprises 4-6 right spiral blades 8, a plurality of chip breakers 9 with the depth h of 0.4-0.8 mm are uniformly distributed on each right spiral blade 8, each right spiral blade 8 is uniformly divided into a plurality of thin teeth 10 by the plurality of chip breakers 9, and a right spiral included angle theta of 60-65 degrees is formed between each chip breaker 9 and the axis of the milling cutter part II1And the right-handed helix included angle theta1Greater than the helix angle theta of the right helical edge 82The helix angle theta of the right helical edge 82Is 5-10 degrees. Right helix included angle theta1Gradually increases from 60 degrees close to the drill part II to 65 degrees close to the cutter handle, and the inclination angle theta of the right spiral blade 82Gradually increasing from 5 near the drill portion i to 10 near the shank iii. Spacing L between adjacent chip breakers 91Consistent, 1.2-1.5 mm, and the distance L between adjacent right helical blades 82Is 1.5 to 2.5 mm. The chip removal space is ensured, chips can be smoothly discharged, and the cutting efficiency and the chip removal capacity are improved.
The cutting edge of each serration 10 for cutting material comprises a cutting edge 6 and a cutting edge 7, the tooth height h of each serration 10 is 0.45-0.6 mm, the maximum radius r of a chip groove is 0.18-0.2 mm, and the normal relief angle α0Is 10-15 degrees and the normal front angle gamma0Is 5-15 degrees.
The drill bit part I and the milling cutter part II are of an integral structure, and are made of hard alloy or can be coated with a wear-resistant material layer, so that the cutting force can be reduced, the wear resistance of the cutter is improved, and the hole making quality is improved.
Claims (8)
1. A linear type three-point-fine-tooth-shaped drilling and milling composite cutter is used for processing carbon fiber reinforced 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 is characterized in that two small-inclination-angle spiral grooves with the same rotation direction are axially arranged on the outer circumferential surface of the drill bit part, a main spiral groove is arranged on the milling cutter part, and the two small-inclination-angle spiral grooves are connected with the main spiral groove; the drill part comprises two axially symmetrical cutting edges, each cutting edge is formed by sequentially connecting a drill point edge, a hole expanding edge, a drill point back edge and a small-inclination-angle hole expanding edge, and the drill point edges of the two cutting edges are connected through a chisel edge; the milling cutter part comprises 4-6 right spiral blades, a plurality of chip breakers with the same depth are uniformly distributed on each right spiral blade, each right spiral blade is uniformly divided into a plurality of thin teeth by the plurality of chip breakers, a right spiral included angle is formed between each chip breaker and the axis of the milling cutter part, and the right spiral included angle is larger than the spiral angle of the right spiral blade.
2. The linear tricuspid-serration type drilling and milling composite tool as claimed in claim 1, wherein the included angle between the drill point edge and the axis of the drill bit portion is 55-60 °, the included angle between the reaming edge and the axis of the drill bit portion is 14-20 °, the included angle between the drill point trailing edge and the axis of the drill bit portion is 60-85 °, and the included angle between the reaming edge with small inclination angle and the axis of the drill bit portion is 7-10 °.
3. The linear tricuspid-serration type drilling and milling composite tool as claimed in claim 1, wherein the width of the chisel edge is 0.5 to 1.5mm, and the angle of inclination of the chisel edge is 50 ° to 60 °.
4. The linear tricuspid-serration drilling and milling composite tool as claimed in claim 1, wherein the angle between the chip breaker of the milling cutter portion and the axis of the milling cutter portion is 60 ° to 65 °, and the helix angle of the right helical edge is 5 ° to 10 °.
5. The linear type tricuspid-serration type drilling and milling composite tool as claimed in claim 1, wherein the distance between adjacent chip breakers is 1.2-1.5 mm, and the distance between adjacent right helical blades is 1.5-2.5 mm.
6. The linear type tricuspid-serration-shaped drilling and milling composite tool as claimed in claim 1, wherein the normal back angle of the serration is 10-15 °, the normal front angle is 5-15 °, the tooth height of the serration is 0.45-0.6 mm, and the maximum radius of the chip pocket of the serration is 0.18-0.2 mm.
7. The linear tricuspid-serration combined drilling and milling tool according to claim 1, wherein the drill portion and the milling cutter portion are of a unitary construction and are made of cemented carbide.
8. A linear tricuspid-fine-toothed combined drill and mill tool according to claim 1, wherein the surfaces of the drill portion and the milling cutter portion are coated with a layer of wear-resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920554790.6U CN210254406U (en) | 2019-04-23 | 2019-04-23 | Linear type three-point-fine tooth-shaped drilling and milling composite cutter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920554790.6U CN210254406U (en) | 2019-04-23 | 2019-04-23 | Linear type three-point-fine tooth-shaped drilling and milling composite cutter |
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| CN210254406U true CN210254406U (en) | 2020-04-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112894996A (en) * | 2021-01-13 | 2021-06-04 | 沈阳航空航天大学 | Progressive cutting drill bit and CFRP hole making method based on progressive cutting drill bit |
| CN113799192A (en) * | 2021-09-28 | 2021-12-17 | 湖南科技大学 | PCD composite cutter for cutting aramid fiber reinforced composite material |
| CN115570186A (en) * | 2022-11-21 | 2023-01-06 | 成都航威精密刃具有限公司 | Cutter and method for inhibiting carbon fiber hole making defects |
-
2019
- 2019-04-23 CN CN201920554790.6U patent/CN210254406U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112894996A (en) * | 2021-01-13 | 2021-06-04 | 沈阳航空航天大学 | Progressive cutting drill bit and CFRP hole making method based on progressive cutting drill bit |
| CN113799192A (en) * | 2021-09-28 | 2021-12-17 | 湖南科技大学 | PCD composite cutter for cutting aramid fiber reinforced composite material |
| CN115570186A (en) * | 2022-11-21 | 2023-01-06 | 成都航威精密刃具有限公司 | Cutter and method for inhibiting carbon fiber hole making defects |
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