CN202571427U - Special tool for helical milling of carbon fiber composites and titanium alloys - Google Patents
Special tool for helical milling of carbon fiber composites and titanium alloys Download PDFInfo
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- CN202571427U CN202571427U CN 201220148618 CN201220148618U CN202571427U CN 202571427 U CN202571427 U CN 202571427U CN 201220148618 CN201220148618 CN 201220148618 CN 201220148618 U CN201220148618 U CN 201220148618U CN 202571427 U CN202571427 U CN 202571427U
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Abstract
The utility model discloses a special tool for helical milling of carbon fiber composites and titanium alloys. The tool comprises a body consisting of a cutting head, a neck and a shank, wherein the cutting head and the neck are stepped; four helical grooves extending to the neck are symmetrically arranged on the side wall of the cutting head and are symmetrical with the central axis of the body as the center; four peripheral teeth are uniformly arranged on the cutting head on the neck along the circumferential direction; the radial rake angle of each tooth is 4-6 degrees; the first radial relief angle of each tooth is 14-16 degrees; the second radial relief angle of each tooth is 18-22 degrees; the cutting bottom edge and side edge of each tooth are connected by a first circular arc, a fillet and a second circular arc in sequence; the included angle between the cutting bottom edge and a vertical line is 3-5 degrees; and two through holes symmetrical with the central axis of the body as the center are arranged in the body. By adopting the tool, the machining efficiency and the machining quality of holes are obviously improved and the service life of the tool is prolonged.
Description
Technical field
The utility model relates to a kind of helical milling dedicated tool, and the utility model relates in particular to carbon fibre composite and titanium alloy helical milling dedicated tool.
Background technology
Development of aviation and aerospace technology is driving the development and the application of new material, and the designing requirement speed of aircraft is faster, weight is lighter and bigger bearing capacity is arranged, and meanwhile, also will use fuel still less, maximizedly reduces cost and pollutes.Advanced aeronautical product inevitable requirement aviation parts have excellent more performance; The low-density of composite and titanium alloy, high strength, premium properties such as corrosion-resistant make its more and more widely be applied to aerospace field, so the working (machining) efficiency and the quality of hard-cutting material such as CFRP/ titanium alloy become one of aerospace field development key technology.
And traditional boring can not have been satisfied the requirement of present Aerobiz to the drilling quality.The drill process of traditional aviation pilot hole generally comprises: bore operations such as bottom outlet, reaming, fraising, ream counterbore, in the two kinds of integrated assembling drilling of material processes, generally also after reaming is accomplished; Taking two kinds of materials apart clears up; Reorientate, fraising again, this causes working (machining) efficiency extremely low.Drilling becomes one of the heaviest machining operation of aviation assembling manufacture process.
Helical milling is a kind of novel drill process, is the spiral drill process of doing revolution less than the bore dia cutter through self rotation the time round the drilling center with the certain deviation amount with one.Helical milling essence is " boring to mill a generation " process, utilizes the mode of screwfeed to realize the drilling campaign.
PCT application PCT/US2010/020018 discloses a kind of end mill(ing) cutter that is used for orbital drilling.This patent comprises: the shank of a shank diameter; The head of the neck of a neck diameter and a cutting diameter; A radius of corner; A re-entrant angle and a longitudinal axis, wherein cutting head comprises a preceding cutting end, and this preceding cutting end has a convexly curved section between this longitudinal axis and radius of corner; Wherein this convexly curved section causes by the material of removing on the workpiece and flows towards this radius of corner radially outwardly from an initial contact area, and the material build in a middle body of this preceding cutting end is minimized.
Above-mentioned patent has only provided cutter general structure and parameter area; And do not point out to be applicable to the processing of which kind of material; More unspecial do not have the introduction of concrete coating coupling to cold hole in needed in carbon fibre composite and the titanium alloy processing, do not have concrete optimum cutter parameters.Above patent is a conceptual introduction, is not applicable to the specific aim of particular process material.
Summary of the invention
The purpose of the utility model is to overcome the shortcoming of prior art; Provide a kind of one the hole of cutter processing different-diameter; And one-shot forming has improved the service life of cutter and the crudy in hole greatly, has reduced tool change time; And do not need to carry out again fine finishining, just can obtain the carbon fibre composite and the titanium alloy helical milling dedicated tool in the hole of very high crudy.
Carbon fibre composite of the utility model and titanium alloy helical milling dedicated tool; It comprises the cutter hub of being made up of cutting head, neck and handle of a knife; Described cutting head and neck are stepped, on described cutting head sidewall symmetry have four helicla flutes that extend to neck, described four helicla flutes are with cutter hub central axis symmetry; Cutting head edge at described cutter neck circumferentially evenly is provided with four peripheral teeth, and the angle of the radial rake of each mill teeth is 4-6 °; The angle of radially first relief angle of each mill teeth is 14-16 °; The angle of radially second relief angle of each mill teeth is 18-22 °; Link to each other through first circular arc, fillet and second circular arc successively between the cutting shear blade of each mill teeth and the side edge; The angle of described cutting shear blade and vertical curve is 3-5 °, in described cutter hub, has two through holes with cutter hub central axis symmetry.
This cutter is applied in the integrated drilling of CFRP/ titanium alloy, especially is applied in the manufacturing assembling of aerospace field.It is compared with traditional boring bar tool, obviously improved working (machining) efficiency and hole crudy, improve cutter service life one the hole of cutter processing different-diameter, and one-shot forming.
1. the stepped design of cutter head and neck, with respect to traditional drilling technique, helical milling can improve the quality in hole significantly.Because cutter is specifically designed to the processing in hole; The stroke that cutter integral body is moved in the hole is longer; In order to prevent that cutter hub itself is to the influence of hole surface; This patent cutter structure adopts recess diameter and the stepped design of cutting head diameter, has effectively improved the chip removal effect of cutter, and the protection machined surface does not receive the secondary damage of smear metal.
2. the Tool in Cutting head adopts two round-corner transitions: because the special process of helical milling; Cutter not only has the side direction feeding; Also have axial feed, therefore, the shear blade intensity of cutter influences the life-span of cutter to a great extent; In order to improve the shear blade intensity of cutter, shear blade and side edge adopt two fillets (among Fig. 3 shown in 17 and 18) transition.Side edge place fillet (shown among Fig. 3 17) also helps the cut-out to the fiber of carbon fibre composite, helps improving the quality of composite machining hole.
3. to the processing characteristic of titanium alloy and composite, because the thermal conductivity factor of titanium alloy is little, cutting temperature is high in the working angles; Reduce the service life of cutter; Moreover, being compounded in and producing Powdered smear metal in the working angles, easy blocking is in the bottom of machining hole; Cutter have around axle center place two symmetries in cold hole (shown among Fig. 1 6), play an important role for effective reduction cutting temperature.This cutter is through a large amount of CFRP/ titanium alloy helical milling tests; The cutting force result is as shown in Figure 5; Experimental result shows that the axial force of cutting when adopting with this cutter is significantly less than boring; Greatly about 150N (cutting carbon fibre composite) and 500N (cutting titanium alloy), and adopt the axial force of conventional tool boring to be approximately 800N (as shown in Figure 4).Test is measured the hole surface quality of this cutter processing, and the result shows that helical milling titanium alloy hole surface roughness Ra value is 0.4um～0.5um, and the hole surface quality reaches the level of finish reaming, and carbon fibre composite hole surface roughness value also can reach 4um.The integrated drilling precision of this patent cutter CFRP/ titanium alloy can reach IT8～IT10 level.
Description of drawings
Fig. 1 is the carbon fibre composite of the utility model and the general structure sketch map of titanium alloy helical milling dedicated tool;
Shown in Figure 2 is knife end view shown in Figure 1;
Fig. 3 is the contouring head enlarged drawing of cutter shown in Figure 1;
Fig. 4 is for adopting conventional tool drilling titanium alloy process cutting force signal graph;
Fig. 5 is for adopting this new-type cutter helical milling process axial force signal graph.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done to describe in detail.
Carbon fibre composite of the utility model and titanium alloy helical milling dedicated tool shown in accompanying drawing; It comprises the cutter hub of being made up of cutting head 1, neck 2 and handle of a knife 3; Described cutting head and neck are stepped; On described cutting head sidewall symmetry have four helicla flutes 10,11,12,13 that extend to cutter bottom, described four helicla flutes are symmetrical center line with cutter hub central axis 5; Cutting head edge at described cutter neck circumferentially evenly is provided with four peripheral teeth, and the optimization angle of the radial rake 7 of each mill teeth is 4-6 °; The angle of radially first relief angle 8 of each mill teeth is 14-16 °; The angle of radially second relief angle 9 of each mill teeth is 18-22 °; Link to each other through first circular arc 19, fillet 18 and second circular arc 17 successively between the cutting shear blade 20 of each mill teeth and the side edge 16; The angle 21 of described cutting shear blade and vertical curve is 3-5 °; This design makes the cutting shear blade that a wedge angle arranged, and is beneficial to the carbon fiber that cuts off in the carbon fibre composite material.In described cutter hub, have two through holes 6 around cutter hub central axis symmetry.15 is the knuckle of cutter neck and cutter head among Fig. 3, and its preferred radius is 2mm.
4 is helical angle among Fig. 1, and the scope that this cutter is optimized helical angle is 34-36 °.The length L 1 of preferred described handle of a knife is 30mm, and handle of a knife diameter D1 is 10mm; Neck 2 diameter D2 are 5.4mm, and neck length L2 is 20mm; The axial length L 3 that head is participated in the zone of cutting is 5mm; The helical flute axial length L 4 of each mill teeth is 6mm, and head diameter D3 is 6mm.Can on the basis that guarantees tool stiffness, make cutter more help chip removal like this, can prevent that also cutting edge and smear metal from causing secondary damage to machined surface simultaneously.
The bore dia of preferred described through hole 6 is 0.8mm.Cold hole can effectively reduce the cutting region temperature in these two through holes conducts, guarantees cutter life, improves crudy.
Preferred described first circular arc, 19 radiuses are that 13mm, fillet 18 radiuses are 0.4mm, and second circular arc, 17 radiuses are 13mm.The center of circle of each radius is confirmed according to tangent constraint.
The distribution of shear blade confirms that with angle [alpha] and β as shown in Figure 2, four angle [alpha] of cutting two cutting shear blades in the shear blade are 95-97 °, and angle beta of two other cutting shear blade is 83-85 °.
Fig. 4 can find out that by figure cutting axial force (Fz) is bigger for adopting conventional tool drilling titanium alloy process cutting force signal, be about 700-800N, and fluctuation is bigger, is unfavorable for stable cutting.Fig. 5 is for adopting this new-type cutter helical milling process axial force signal graph.Compare with the drilling axial force; Axial force is about 100N (carbon fibre composite) and 500N (titanium alloy) when carrying out helical milling with this cutter, and less than employing conventional tool drilling process cutting force, and cutting force is comparatively steady; Help improving cutter life, guarantee crudy.
Claims (6)
1. carbon fibre composite and titanium alloy helical milling dedicated tool; It comprises the cutter hub of being made up of cutting head, neck and handle of a knife; It is characterized in that: described cutting head and neck are stepped, on described cutting head sidewall symmetry have four helicla flutes that extend to neck, described four helicla flutes are with cutter hub central axis symmetry; Cutting head edge at described cutter neck circumferentially evenly is provided with four peripheral teeth, and the angle of the radial rake of each mill teeth is 4-6 °; The angle of radially first relief angle of each mill teeth is 14-16 °; The angle of radially second relief angle of each mill teeth is 18-22 °; Link to each other through first circular arc, fillet and second circular arc successively between the cutting shear blade of each mill teeth and the side edge; The angle of described cutting shear blade and vertical curve is 3-5 °, in described cutter hub, has two through holes around cutter hub central axis symmetry.
2. carbon fibre composite according to claim 1 and titanium alloy helical milling dedicated tool is characterized in that: described spiral fluted helical angle is 34-36 °, and the length of described handle of a knife is 30mm, and the handle of a knife diameter is 10mm; Described recess diameter is 5.4mm, and neck length is 20mm.
3. carbon fibre composite according to claim 1 and 2 and titanium alloy helical milling dedicated tool is characterized in that: the axial length that cutting head is participated in the zone of cutting is 5mm; The helical flute axial length of each mill teeth is 6mm, and the cutting head diameter is 6mm.
4. carbon fibre composite according to claim 3 and titanium alloy helical milling dedicated tool is characterized in that: the bore dia of described through hole is 0.8mm.
5. carbon fibre composite according to claim 4 and titanium alloy helical milling dedicated tool is characterized in that: described first arc radius is 13mm, and radius of corner is 0.4mm, and second arc radius is 13mm.
6. carbon fibre composite according to claim 5 and titanium alloy helical milling dedicated tool is characterized in that: four angles of cutting two cutting shear blades in the shear blade are 95-97 °, and angle of two other cutting shear blade is 83-85 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220148618 CN202571427U (en) | 2012-04-10 | 2012-04-10 | Special tool for helical milling of carbon fiber composites and titanium alloys |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220148618 CN202571427U (en) | 2012-04-10 | 2012-04-10 | Special tool for helical milling of carbon fiber composites and titanium alloys |
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| CN202571427U true CN202571427U (en) | 2012-12-05 |
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| CN 201220148618 Expired - Fee Related CN202571427U (en) | 2012-04-10 | 2012-04-10 | Special tool for helical milling of carbon fiber composites and titanium alloys |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103357938A (en) * | 2013-07-04 | 2013-10-23 | 哈尔滨理工大学 | Efficient annular milling cutter for inclined surface |
| CN104384823A (en) * | 2014-09-24 | 2015-03-04 | 哈尔滨汽轮机厂有限责任公司 | Method for machining titanium alloy pipe plate pipe hole |
| CN104708098A (en) * | 2015-02-16 | 2015-06-17 | 天津大学 | Special cutter for machining small-diameter pore helical milling of composite material |
| CN104722815A (en) * | 2015-03-10 | 2015-06-24 | 深圳市圆梦精密技术研究院 | Composite material hole machining combined blade drilling, milling and chamfering tool |
| CN104785826A (en) * | 2015-04-22 | 2015-07-22 | 孙海燕 | Drill bit used for composite material and machining method and device using same |
| CN105583450A (en) * | 2015-12-18 | 2016-05-18 | 天津大学 | Special cutter for processing large-diameter spiral milling holes of composite material and titanium-alloy laminated component |
| CN106270702A (en) * | 2016-10-25 | 2017-01-04 | 哈尔滨理工大学 | A kind of monoblock type hard alloy profile milling cutter with curve sword |
| CN107059549A (en) * | 2017-05-31 | 2017-08-18 | 河南高远公路养护设备股份有限公司 | The shearing wheel of fiber shearing device |
| CN107262796A (en) * | 2017-05-19 | 2017-10-20 | 天津大学 | One kind is suitable to industrial robot module laminated body helical milling Special compound tool |
| WO2019210506A1 (en) * | 2018-05-04 | 2019-11-07 | 大连理工大学 | Helical milling tool with forward and backward feeding |
| WO2019210505A1 (en) * | 2018-05-04 | 2019-11-07 | 大连理工大学 | Forward-reverse feed helical milling method |
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2012
- 2012-04-10 CN CN 201220148618 patent/CN202571427U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103357938B (en) * | 2013-07-04 | 2016-08-10 | 哈尔滨理工大学 | Oblique profile highly effective ring milling cutter |
| CN103357938A (en) * | 2013-07-04 | 2013-10-23 | 哈尔滨理工大学 | Efficient annular milling cutter for inclined surface |
| CN104384823A (en) * | 2014-09-24 | 2015-03-04 | 哈尔滨汽轮机厂有限责任公司 | Method for machining titanium alloy pipe plate pipe hole |
| CN104708098A (en) * | 2015-02-16 | 2015-06-17 | 天津大学 | Special cutter for machining small-diameter pore helical milling of composite material |
| CN104722815A (en) * | 2015-03-10 | 2015-06-24 | 深圳市圆梦精密技术研究院 | Composite material hole machining combined blade drilling, milling and chamfering tool |
| CN104785826A (en) * | 2015-04-22 | 2015-07-22 | 孙海燕 | Drill bit used for composite material and machining method and device using same |
| CN104785826B (en) * | 2015-04-22 | 2019-04-02 | 济源职业技术学院 | Drill for composite material and the machining process and machinery processing apparatus for using it |
| CN105583450A (en) * | 2015-12-18 | 2016-05-18 | 天津大学 | Special cutter for processing large-diameter spiral milling holes of composite material and titanium-alloy laminated component |
| CN106270702A (en) * | 2016-10-25 | 2017-01-04 | 哈尔滨理工大学 | A kind of monoblock type hard alloy profile milling cutter with curve sword |
| CN107262796A (en) * | 2017-05-19 | 2017-10-20 | 天津大学 | One kind is suitable to industrial robot module laminated body helical milling Special compound tool |
| CN107059549A (en) * | 2017-05-31 | 2017-08-18 | 河南高远公路养护设备股份有限公司 | The shearing wheel of fiber shearing device |
| CN107059549B (en) * | 2017-05-31 | 2019-04-16 | 河南高远公路养护设备股份有限公司 | The shearing wheel of fiber shearing device |
| WO2019210506A1 (en) * | 2018-05-04 | 2019-11-07 | 大连理工大学 | Helical milling tool with forward and backward feeding |
| WO2019210505A1 (en) * | 2018-05-04 | 2019-11-07 | 大连理工大学 | Forward-reverse feed helical milling method |
| EP3789144A4 (en) * | 2018-05-04 | 2021-12-15 | Dalian University Of Technology | Helical milling tool with forward and backward feeding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20180410 |