CN105835120A - Negative pressure reverse cooling-adopted high-quality processing method for fiber reinforced composite - Google Patents
Negative pressure reverse cooling-adopted high-quality processing method for fiber reinforced composite Download PDFInfo
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- CN105835120A CN105835120A CN201610392258.XA CN201610392258A CN105835120A CN 105835120 A CN105835120 A CN 105835120A CN 201610392258 A CN201610392258 A CN 201610392258A CN 105835120 A CN105835120 A CN 105835120A
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- Prior art keywords
- negative pressure
- drilling
- air pump
- cutter
- fiber reinforced
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- 239000003733 fiber-reinforced composite Substances 0.000 title claims abstract description 8
- 238000003672 processing method Methods 0.000 title claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 63
- 239000002131 composite material Substances 0.000 claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000003434 inspiratory effect Effects 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 abstract description 15
- 230000007547 defect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000032798 delamination Effects 0.000 abstract 1
- 238000010410 dusting Methods 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 230000006378 damage Effects 0.000 description 5
- 208000014674 injury Diseases 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/16—Perforating by tool or tools of the drill type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D7/018—Holding the work by suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/18—Means for removing cut-out material or waste
- B26D7/1845—Means for removing cut-out material or waste by non mechanical means
- B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
Abstract
The invention discloses a negative pressure reverse cooling-adopted high-quality processing method for a fiber reinforced composite, belongs to the technical field of cutting processing, and relates to a processing method for high-quality drilling and hole making of the fiber reinforced composite. The method is characterized in that different cooling technologies are implemented when different positions of the fiber reinforced composite formed through laying and curing a plurality of layers of prepregs are drilled. The method comprises the steps that firstly, a negative pressure cover is attached to the surface of the composite during the fiber reinforced composite hole making process; negative pressure is generated in the negative pressure cover and a drilling hole cavity through utilizing an air pump; drilling dust and cuttings are quickly collected; positive pressure is generated around a drill internal cooling hole through utilizing a cutter air pump, as as to help cooling the cuttings; and when the last layers of the material are drilled, the drill internal cooling hole performs negative pressure suction instead of positive pressure ventilation, relatively high negative pressure is generated for the material at the outlet part, support is provided for the drilling process, and a drill cutting edge is enabled to cut fibers. According to the method, defects such as burrs and delamination are effectively reduced, and the fiber reinforced composite is drilled and processed at high quality.
Description
Technical field
The invention belongs to Machining Technology for Cutting field, relate to a kind of fibre reinforced composites high-quality drilling system
The processing method in hole.
Background technology
Fibre reinforced composites the most gradually replace metal by extensively because of excellent properties such as light weight, intensity height
It is applied in various engineering fields, as aramid fiber has strengthened composite, carbon fibre reinforced composite
It is used for manufacturing aircraft large-sized structural parts.Although fibre reinforced composites are the nearest
Clean shape, but during product finally assembles, still need to a large amount of drilling, carry out riveting, bolt connection etc..By
In fibre reinforced composites by matrix and fiber reinforcement phase composition, the anisotropy of material own, and matrix and
The alternate bond strength of fiber reinforcement is low, the problems such as layering, burr easily occurs in drilling is processed.Additionally,
Owing to producing processing heat height in drilling in processing, and chip is difficult to discharge, when cutting temperature exceedes matrix glass
After glass conversion temperature, matrix softens, ablation, and after drilling, hot injury takes place frequently.Carbon fiber composite at present
The drilling processing of material uses the DRY CUTTING technique of outside dust suction more or outwards sprays cooling medium from cutter interior
Cutting Process.As Harbin University of Science and Technology Liu Li et al. has invented, " carbon fibre composite drilling process goes
Except material is collected and dust pelletizing system " patent, application number CN104385353A.This system by with machine tool chief axis
Connect, by suction air, thus during collecting composite processing produce chip and drift along, so
And aforesaid way only adsorbs chip, the high temperature of cutting zone in working angles is not suppressed, therefore without
Method solves processing hot injury's problem.Kentucky, United States university T.Xia et al. at Xia T, Kaynak Y, Arvin C,
et al.Cryogenic cooling-induced process performance and surface integrity in drilling
CFRP composite material[J].The International Journal of Advanced Manufacturing
Technology, 2016,82 (1-4): use in 605-616. literary composition and be passed through low temperature by cutter inner cooling hole to cutting region
The mode of nitrogen reduces cutting region temperature, discharges chip and effectively reduces tool wear.Though said method can have
Effect realizes chip discharge, reduces cutting region temperature, reduces the probability that hole wall hot injury produces, but in drilling
Exit position is more weak due to external support, and it is low that residue does not cuts material stiffness, and material is in the effect of gases at high pressure
Under, yielding, cause drill bit to be difficult to cut staple, exacerbate the generation of burr.Therefore, use existing
Process is difficult to the high-quality drilling processing of fibre reinforced composites.
Summary of the invention
Burr is exported serious, chip removal difficulty during the present invention is directed to present stage fibre reinforced composites drilling
And the problem that cutting region temperature is too high, invent the fibre reinforced composites high-quality that negative pressure inversely cools down and added
Work method.The method is in fibre reinforced composites drilling is processed, by negative pressure cover and drawbore intracavity
Produce negative pressure, material chip and the dust of generation are discharged rapidly, reduce hole wall temperature, and by cutter gas
Pump produces malleation in drill bit near cold hole, accelerate chip discharge process, reduces cutter and cutting region further
Temperature, when which floor drill bit apex point exports close to fibre reinforced composites, in drill bit, cold hole is by positive airway pressure
Change negative inspiratory pressure into, during drilling finally exports one layer, realize producing near exit position bigger negative pressure,
There is provided for drilling process and support, thus effectively reduce layering, reduce veining defect, it is achieved fiber-reinforced composite
The high-quality drilling processing of material.
The technical solution used in the present invention is the fibre reinforced composites high-quality processing side that negative pressure inversely cools down
Method, is characterized in that, the fibre reinforced composites that the method is solidified by multilamellar prepreg lay in drilling
During workpiece diverse location, implement different cooling technique；First with negative pressure cover at fibre reinforced composites
It is attached at composite material surface during drilling, utilizes air pump to produce negative pressure at negative pressure cover and drawbore intracavity,
Collect rapidly drilling dust and chip, and in drill bit, near cold hole, produce malleation by cutter air pump, auxiliary
Help chip to lower the temperature, drilling to material last which floor time, in drill bit, cold hole is changed into negative inspiratory pressure by positive airway pressure,
Exit site material being produced bigger negative pressure, provides for drilling process and support, beneficially drill edge cuts off
Fiber, method specifically comprises the following steps that
1) negative pressure cover 1 is closely attached to the workpiece surface 3 of fibre reinforced composites workpiece 2, negative pressure cover
1 other end is connected with main shaft 10；Opening negative pressure chip removal air pump 4, regulation flow control valve 5 controls negative pressure
The size of negative pressure in cover chamber 12 and drilling vestibule 13；Open cutter air pump 6 simultaneously, adjust reversal valve 7,
Making airflow direction is from cutter air pump 6 to drilling vestibule 13 direction, and regulates cutter gas flow regulating valve 8
The size of cold hole 14 malleation air flow rate in control drill bit；Open negative pressure cover 1 both sides left side check valve 18,
Right one-way valve 19, it is ensured that air in the smooth suction cover chamber 12 of chip removal air pump 4 also prevents chip, powder
Dirt leaks；
2) machined parameters of setting drill bit 9: the speed of mainshaft and feed speed, starts main shaft 10 and carries out drilling
Processing；The chip discharged enters chip collecting device 15 by negative pressure cage apertures 11；
3) by the feed speed set and thickness of workpiece data are calculated, when drilling is the most several to material
During layer 16, machine tool control system adjusts reversal valve 7 automatically, and in making drill bit, cold hole is changed into negative pressure by positive airway pressure
Air-breathing, exit site material, for return to cutter air pump 6 direction from drilling vestibule 13, is produced relatively by airflow direction
Big negative pressure, and regulate cutter gas flow regulating valve 8 intensified negative pressure air flow rate；
4) under negative pressure chip removal air pump 4 and cutter air pump 6 act on jointly, produce near drilling exit position 17
Raw bigger negative pressure, reduces the deformation that this position material is outside, until having holed.
The invention have the advantages that the method, when drilling diverse location, implements different cooling technique,
Can efficiently discharge the chip produced in the fibre reinforced composites drilling course of processing, reduce cutting zone temperature,
Reduce the probability that in the course of processing, material hot injury produces, and when drilling exports last a few layer material, use
Negative pressure inversely cools down processing technique strategy, reduces the deformation that this position material is outside, improves exit material and remains
Remaining rigidity, makes fiber be more easy to be cut off, significantly reduces the defect such as burr and layering.
Accompanying drawing explanation
Fig. 1 is fibre reinforced composites machining sketch charts；Fig. 2 is fibre reinforced composites drilling to
Which floor position view rear；When Fig. 3 is the outlet of drilling fibre reinforced composites, fiber burr removes schematic diagram,
Fig. 4 is effect after the processing of common dry drilling, and Fig. 5 is to use effect after this patent method drilling processing.Its
In, 1-negative pressure cover, 2-fibre reinforced composites workpiece, 3-workpiece surface, 4-negative pressure chip removal air pump, 5-
Flow control valve, 6-cutter air pump, 7-reversal valve, 8-cutter gas flow regulating valve, 9-drill bit, 10-main shaft,
11-negative pressure cage apertures, 12-negative pressure cover chamber, 13-drilling vestibule, cold hole in 14-drill bit, 15-chip collecting device,
16-material last which floor, 17-exit position, check valve on the left of 18-, 19-right one-way valve.
Detailed description of the invention
The detailed description of the invention of the present invention is described in detail below in conjunction with technical scheme and accompanying drawing.
The fibre reinforced composites high-quality processing method that negative pressure inversely cools down uses processing as shown in Figure 1
System, choosing fibre reinforced composites workpiece is to be formed by 20 layers of prepreg lay solidification, and thickness is 4mm,
Every a layer thickness is about 0.2mm.Negative pressure cover 1 is closely attached to the workpiece of fibre reinforced composites workpiece 2
Upper surface 3, negative pressure cover 1 other end is connected with main shaft 10.Open negative pressure chip removal air pump 4, regulate flow
It is 5L/min that regulation valve 5 controls negative-pressure air-flow flow.Open cutter air pump 6 simultaneously, adjust reversal valve 7, make
Airflow direction is from cutter air pump 6 to drilling vestibule 13 direction, and regulates cutter gas flow regulating valve 8 and control
Malleation air flow rate processed is 2L/min, opens check valve 18 on the left of negative pressure cover, right one-way valve 19, it is ensured that row
Consider the air in the smooth suction cover chamber 12 of air pump 4 to be worth doing and prevent chip, dust from leaking.
Set the machined parameters of drill bit 9 as speed of mainshaft 3000r/min, feeding 100mm/min, start main shaft
10 carry out drilling processing, and the chip of discharge enters chip collecting device 15 by negative pressure cage apertures 11.From cutter
The contact workpiece material moment rises, and is calculated by feed speed and thickness of workpiece data, drill bit 9 after 2.16 seconds
Drilling to material last which floor 16 time, machine tool control system adjusts reversal valve 7 automatically, make airflow direction be from
Drilling vestibule 13 returns to cutter air pump 6 direction, and regulates cutter gas flow regulating valve 8 intensified negative pressure air-flow
Flow is to 3L/min, under negative pressure chip removal air pump 4 and cutter air pump 6 act on simultaneously, and drilling exit position 17
The negative pressure that neighbouring generation is bigger, for drilling material which floor process of 16 last provides and supports, reduce this position material
Expect outside deformation, help drill edge cut staple, as shown in Figure 2 and Figure 3.
Commonly dry drilling processing technique is with this patent process ration experimental result as shown in Figure 4, Figure 5, Fig. 4
It is the effect after the processing of common dry drilling, it can be seen that outlet has obvious burr, and drilling total quality is relatively
Difference, Fig. 5 is the form defects such as the effect after using this patent process drilling processing, outlet impulse-free robustness,
Processing metapore quality is good.
Use the present invention that fibre reinforced composites are carried out drilling processing, the diverse location in drilling process,
Implement different cooling technique, can efficiently discharge in the fibre reinforced composites drilling course of processing produce cut
Bits, reduce cutting zone temperature, reduce the probability that in the course of processing, material hot injury produces, and go out in drilling
During the last a few layer material of mouth, use negative pressure inversely to cool down processing technique strategy, reduce this position material outside
Deformation, improves exit material Residual Stiffness, makes fiber be more easy to be cut off, significantly reduce burr and
The defects such as layering.
Claims (1)
1. the fibre reinforced composites high-quality processing method that negative pressure inversely cools down, is characterized in that,
The fibre reinforced composites workpiece that the method is solidified by multilamellar prepreg lay in drilling
During diverse location, implement different cooling technique；First with negative pressure cover in fiber-reinforced composite
It is attached at composite material surface during material drilling, utilizes air pump at negative pressure cover and drilling vestibule
Interior generation negative pressure, collects rapidly drilling dust and chip, and by cutter air pump in drill bit
Produce malleation near cold hole, auxiliary chip cooling, drilling to material last which floor time, drill bit
Interior cold hole is changed into negative inspiratory pressure by positive airway pressure, and exit site material is produced bigger negative pressure,
There is provided for drilling process and support, beneficially drill edge cut staple；Method specifically comprises the following steps that
1) negative pressure cover (1) is closely attached to the workpiece of fibre reinforced composites workpiece (2)
Upper surface (3), negative pressure cover (1) other end is connected with main shaft (10)；Open negative pressure row
Bits air pump (4), regulation flow control valve (5) controls negative pressure cover chamber (12) and drawbore
The size of chamber (13) interior negative pressure；Open cutter air pump (6) simultaneously, adjust reversal valve (7),
Making airflow direction is to drilling vestibule (13) direction from cutter air pump (6), and regulates cutter
The size of cold hole (14) malleation air flow rate in gas flow regulating valve (8) control drill bit；
Open the left side check valve (18) of negative pressure cover (1) both sides, right one-way valve (19), it is ensured that
Air in chip removal air pump (4) smoothly suction cover chamber (12) also prevents chip, dust
Leak；
2) machined parameters of setting drill bit (9): the speed of mainshaft and feed speed, starts main shaft
(10) drilling processing is carried out；The chip discharged enters chip by negative pressure cage apertures (11) and collects
Device (15)；
3) by set feed speed and thickness of workpiece data calculate, when drilling extremely
Material last which floor (16) time, machine tool control system automatically adjusts reversal valve (7), makes drill bit
Interior cold hole is changed into negative inspiratory pressure by positive airway pressure, and airflow direction is to return from drilling vestibule (13)
Cutter air pump (6) direction, produces bigger negative pressure to exit site material, and regulates cutter
Gas flow regulating valve (8) intensified negative pressure air flow rate；
4) in negative pressure chip removal air pump (4) with under cutter air pump (6) jointly effect, drilling goes out
Produce bigger negative pressure near mouth position (17), reduce the deformation that this position material is outside, directly
To having holed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610392258.XA CN105835120B (en) | 2016-06-06 | 2016-06-06 | The fibre reinforced composites high-quality processing method that negative pressure is inversely cooled down |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610392258.XA CN105835120B (en) | 2016-06-06 | 2016-06-06 | The fibre reinforced composites high-quality processing method that negative pressure is inversely cooled down |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105835120A true CN105835120A (en) | 2016-08-10 |
| CN105835120B CN105835120B (en) | 2017-06-23 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106965249A (en) * | 2017-03-13 | 2017-07-21 | 大连理工大学 | The servo-actuated reverse cooling of fibre reinforced composites processing and dust pelletizing system |
| CN107457824A (en) * | 2017-08-23 | 2017-12-12 | 苏州市吴通电子有限公司 | A kind of pcb board hole slag remover |
| CN108555356A (en) * | 2018-03-27 | 2018-09-21 | 大连理工大学 | The portable reverse cooling of one kind and dust removal integrated plant |
| CN108608040A (en) * | 2018-05-10 | 2018-10-02 | 大连理工大学 | For composite material and its micro- serrated knife tool of the double ladders of the perpendicular sword of laminated construction high quality drilling |
| CN108687860A (en) * | 2018-05-14 | 2018-10-23 | 天津大学 | One kind is based on composite material drilling processing active chip removal device and method |
| CN109719559A (en) * | 2019-01-29 | 2019-05-07 | 华工法利莱切焊系统工程有限公司 | Drill scrap collecting system and steel plate machining center equipment |
| CN112318608A (en) * | 2020-10-15 | 2021-02-05 | 中北大学 | Drilling layering defect suppression device and suppression method capable of collecting drilling dust |
| CN113814750A (en) * | 2021-11-23 | 2021-12-21 | 宁波隆源精密机械有限公司 | A system of processing for new energy automobile main casing body |
| CN113844064A (en) * | 2021-09-23 | 2021-12-28 | 沈阳航空航天大学 | CFRP low-damage sliding cutting method and hole making drill bit |
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|---|---|---|---|---|
| CN106965249B (en) * | 2017-03-13 | 2018-08-21 | 大连理工大学 | Fibre reinforced composites processing is servo-actuated reverse cooling and dust pelletizing system |
| CN106965249A (en) * | 2017-03-13 | 2017-07-21 | 大连理工大学 | The servo-actuated reverse cooling of fibre reinforced composites processing and dust pelletizing system |
| CN107457824A (en) * | 2017-08-23 | 2017-12-12 | 苏州市吴通电子有限公司 | A kind of pcb board hole slag remover |
| CN108555356A (en) * | 2018-03-27 | 2018-09-21 | 大连理工大学 | The portable reverse cooling of one kind and dust removal integrated plant |
| CN108555356B (en) * | 2018-03-27 | 2019-07-12 | 大连理工大学 | The portable reverse cooling of one kind and dust removal integrated plant |
| CN108608040B (en) * | 2018-05-10 | 2020-04-07 | 大连理工大学 | Vertical-edge double-step micro-tooth cutter for high-quality hole making of composite material and laminated structure of composite material |
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| CN108687860A (en) * | 2018-05-14 | 2018-10-23 | 天津大学 | One kind is based on composite material drilling processing active chip removal device and method |
| CN109719559A (en) * | 2019-01-29 | 2019-05-07 | 华工法利莱切焊系统工程有限公司 | Drill scrap collecting system and steel plate machining center equipment |
| CN109719559B (en) * | 2019-01-29 | 2024-03-19 | 华工法利莱切焊系统工程有限公司 | Drilling scrap iron collecting system and steel plate machining center equipment |
| CN112318608A (en) * | 2020-10-15 | 2021-02-05 | 中北大学 | Drilling layering defect suppression device and suppression method capable of collecting drilling dust |
| CN112318608B (en) * | 2020-10-15 | 2023-04-11 | 中北大学 | Drilling layering defect suppression device and suppression method capable of collecting drilling dust |
| CN113844064A (en) * | 2021-09-23 | 2021-12-28 | 沈阳航空航天大学 | CFRP low-damage sliding cutting method and hole making drill bit |
| CN113844064B (en) * | 2021-09-23 | 2023-09-05 | 沈阳航空航天大学 | CFRP low-damage sliding cutting method and drilling bit |
| CN113814750A (en) * | 2021-11-23 | 2021-12-21 | 宁波隆源精密机械有限公司 | A system of processing for new energy automobile main casing body |
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