CN103611793B - The multidirectional dither hot-forming die of multimode - Google Patents
The multidirectional dither hot-forming die of multimode Download PDFInfo
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Abstract
The invention belongs to hot-forming die technical field, relate to the multidirectional dither hot-forming die of multimode, comprise patrix, patrix and the guide post for upper and lower mould relative motion guiding, the downside of described counterdie is provided with the hydraulic vibration exciter that can carry out dither to multiple directions, and advantage is: the resistance that during thermoformed workpiece, the flow stress of metal material is little, metal flows into die is low, stable load, extruding force are relatively little.
Description
Technical field
The invention belongs to hot-forming die technical field, refer in particular to the multidirectional dither hot-forming die of a kind of multimode.
Background technology
Hot formed processing method utilizes the at high temperature higher change of metal material plasticity, characteristic that shape drag is less, with powerful pressure and certain speed, metal blank is forced to produce Plastic Flow, by punch and the gap of die or the outlet of die, extrude hollow or that section is less than blank section solid member.Metal streamline is continuous, intensity is high to adopt the part of heat forming technology processing to have, and plasticity is strong, and formed precision is high, the features such as in forming stroke, frictional force is little, and heat trnasfer is more even, and mechanical property is extremely strong, process security is higher, has better economic benefit and social benefit.
Since the resistance of deformation that nineteen fifty-five F.Blaha and B.Langenecker discloses when additional Under Ultrasonic Vibration kinetic energy reduces monocrystal zinc plastic deformation first, many scholars of countries in the world are theoretical and experimental study extensively and profoundly for the application start of vibration in Metal Forming.After adopting hydraulic pressure dither to combine with metal fever forming technique, be conducive to material flowing during part forming, the Frotteurism between metal and mould can be improved, reduce the frictional force of blank and die surface, reduce internal stress, thus reach the feature reducing extruding force.Because amplitude is small, the dimensional accuracy of drip molding also can not be affected.At present, be applied in the process such as punching, shearing, pressure-sizing, rolling of the drawing of wire rod, tubing and heterotypic material, metal material, the exciting mode adopted is mainly based on power ultrasonic vibration and mechanical type, both have obviously limitation, such as direction of vibration is limited, power output is limited, generation exciting force is less, and frequency and amplitude are difficult to regulate.
Summary of the invention
The object of this invention is to provide the multidirectional dither hot-forming die of the multimode that resistance is low, stable load, extruding force are relatively little that flow stress is little, metal flows into die of metal material during a kind of thermoformed workpiece.
The object of the present invention is achieved like this:
The multidirectional dither hot-forming die of multimode, comprise patrix, patrix and the guide post for upper and lower mould relative motion guiding, the downside of described counterdie is provided with the hydraulic vibration exciter that can carry out dither to multiple directions.
The concrete structure of above-mentioned hydraulic vibration exciter is: in hydraulic vibration exciter outer ring, be provided with excitor, at least one horizontal plane of excitor and at least one vertical plane are respectively arranged with more than one groove, the opening part of each groove is provided with flexible end cap and forms flutter chamber, all flutter chambeies are all communicated with the excitation valve of driven by servomotor by conduit under fluid pressure, and the oil-in of excitation valve is communicated with by conduit with the high-pressure oil outlet of hydraulic press.
The pipeline that above-mentioned flutter chamber is communicated with excitation valve is provided with the speed change cavity of variable volume.
Be provided with piston in above-mentioned speed change cavity and speed change cavity be divided into frequency conversion chamber and connecting rod chamber, the connecting rod stretched out outside connecting rod chamber be connected with piston is provided with in connecting rod chamber, by the diverse location of connecting rod adjustable piston in speed change cavity and then the volume size in adjustment frequency conversion chamber, realize the change of vibration frequency.
The maximum speed of above-mentioned servomotor is 3000 turns/min, the spool both sides of described excitation valve have the window that eight equal and opposite in direction angles are staggered, be connected with the gearbox of a 1:2 between servomotor and spool, therefore theoretical highest frequency is 50 × 2 × 16=1500Hz.
There are the flutter chamber on horizontal plane and the flutter chamber on vertical plane in above-mentioned flutter chamber, and the volume ratio in the flutter chamber on the volume in the flutter chamber on vertical plane and horizontal plane is 1:2.
The concrete structure of above-mentioned patrix is: punch, on punch cushion block, is fixed on cope match-plate pattern with bolt by punch pad together with punch cushion block and punch trim ring; The concrete structure of described counterdie is: agreed with by the bodily form by die trim ring and die, is fixed on hydraulic vibration exciter outer ring together with die cushion block by bolt, and is finally bolted on lower bolster.
Above-mentioned hydraulic vibration exciter is arranged between counterdie and lower bolster.
Above-mentioned hydraulic vibration exciter and the forcing press driving patrix to move up and down share a high-pressure oil pump for its voltage supply.
The present invention gives prominence to compared to existing technology and useful technique effect is:
The present invention adopts hydraulic vibration technology, have and export the large feature of exciting force, the multidirectional vibration of mould in hot extrusion process can be realized, also the stepless changing of frequency and amplitude can be realized, thus well overcome the limitation of traditional ultrasonic vibration and mechanical type vibration, under flutter fashion of extrusion, due to the high frequency flutter of die, the flow stress of material is reduced during thermoformed workpiece, and the Frotteurism improved between blank and die, the resistance that metal flows into die reduces, thus make load remain on a metastable level, the size of extruding force not only can be reduced for thermoforming processing, and also to have Technology for Heating Processing and obviously act on, there is important theory significance and Practical background.
Accompanying drawing explanation
Fig. 1 is structure sectional view of the present invention.
Fig. 2 is the voltage supply state principle figure of hydraulic vibration exciter of the present invention.
Fig. 3 is the reflux state schematic diagram of hydraulic vibration exciter of the present invention.
Fig. 4 is the structure principle chart of multimode hydraulic vibration exciter of the present invention.
Fig. 5 is hydraulic system principle figure of the present invention.
Fig. 6 is traditional hot extrusion molding process load diagram.
Fig. 7 is the present invention's hot extrusion stroke load diagram under flutter condition.
Detailed description of the invention
Below in conjunction with accompanying drawing, with specific embodiment, the invention will be further described, see Fig. 1-Fig. 7:
The multidirectional dither hot-forming die of multimode, comprise patrix A, patrix A and the guide post 11 for upper and lower mould relative motion guiding, the downside of described counterdie B is provided with the hydraulic vibration exciter 10 that can carry out dither to multiple directions.
The concrete structure of above-mentioned hydraulic vibration exciter 10 is: in the 10b of hydraulic vibration exciter outer ring, be provided with excitor 10a, at least one horizontal plane of excitor 10a and at least one vertical plane are respectively arranged with more than one groove, the opening part of each groove is provided with flexible end cap 101,105 and forms flutter chamber 102,104, the excitation valve 14 that all flutter chambeies 102,104 are all driven by conduit under fluid pressure 103 and servomotor 13 is communicated with, and the oil-in of excitation valve 14 is communicated with by conduit with the high-pressure oil outlet of hydraulic press.
The pipeline that above-mentioned flutter chamber 102,104 is communicated with excitation valve 14 is provided with the speed change cavity of variable volume.
Be provided with piston 108 in above-mentioned speed change cavity and speed change cavity be divided into frequency conversion chamber 109 and connecting rod chamber 106, the connecting rod 107 stretched out outside connecting rod chamber 106 be connected with piston 108 is provided with in connecting rod chamber 106, by the diverse location of connecting rod 107 adjustable piston 108 in speed change cavity and then the volume size in adjustment frequency conversion chamber 109, realize the change of vibration frequency.
The maximum speed of above-mentioned servomotor 13 is 3000 turns/min, spool 141 both sides of described excitation valve 14 have the window that eight equal and opposite in direction angles are staggered, be connected with the gearbox of a 1:2 between servomotor 13 and spool 14, therefore theoretical highest frequency is 50 × 2 × 16=1500Hz.
There are the flutter chamber 104 on horizontal plane and the flutter chamber 102 on vertical plane in above-mentioned flutter chamber, and the volume ratio in the flutter chamber 104 on the volume in the flutter chamber 102 on vertical plane and horizontal plane is 1:2.
The concrete structure of above-mentioned patrix A is: punch 4 pads on punch cushion block 2, is fixed on cope match-plate pattern 1 with bolt by punch 4 together with punch cushion block 2 and punch trim ring 3; The concrete structure of described counterdie B is: agreed with by the bodily form by die trim ring 5 and die 6, be fixed on hydraulic vibration exciter outer ring 9, and be finally bolted on lower bolster 12 by bolt together with die cushion block 8.
Above-mentioned hydraulic vibration exciter 10 is arranged between counterdie and lower bolster 12.
Above-mentioned hydraulic vibration exciter 10 shares a high-pressure oil pump 16 for its voltage supply with the forcing press 19 driving patrix A to move up and down.
During work, hydraulic vibration exciter 10 shares a high-pressure oil pump 16 for its voltage supply with the forcing press 19 driving patrix A to move up and down, and when forcing press 19 starts to extrude work, the exciting oil circuit 13 of hydraulic vibration exciter 10 is also opened simultaneously.By the high frequency rotational of excitation valve 14, thus the high frequency changing high-low pressure oil pressure in flutter chamber 102,104 switches, thus produces high frequency flutter.Therefore while bearing of die extrusion sections, hydraulic vibration exciter 10 also works, and drives die synchronous vibration with certain frequency and amplitude.The flutter of high frequency is conducive to material flowing during part forming, and can improve friction condition and reduce flow stress, thus reaches the object of antifriction load shedding.In addition, because the amplitude of flutter is small, the dimension precision requirement of drip molding can not be affected.
The fundamental diagram that in the flutter chamber 102,104 forming hydraulic vibration exciter 10 together with Fig. 2 with Fig. 3, high-low pressure oil pressure switches.The rotation of excitation valve 14 is driven by servomotor 13, the valve port area size that eight grooves evenly offered along spool land circumference are matched with window on valve pocket becomes cyclically-varying, and the groove mutual dislocation on adjacent shoulder, form the periodically-varied in the fluid direction by excitation valve 14.During work, when spool 141 goes to position shown in Fig. 2, P-A is communicated with, and hydraulic oil passes through excitation valve 14 from oil pump 16(or title oil sources) enter flutter chamber 102,104, two elasticity end caps 101,105 are heaved respectively to diagram upside and left side distortion; On the right side of when spool 141 goes to Fig. 3 position, the notch of shoulder and valve pocket window are linked up, A-T is communicated with, hydraulic oil in flutter chamber 102,104 flows back to fuel tank by excitation valve 14, and elasticity end cap 101,105 deformation-recovery to origin-location, thus realizes the process of high frequency flutter.Utilize the fluid uninterrupted in plug-in mounting choke valve adjustable turnover flutter chamber, and then realize the adjustment of flutter device disresonance point amplitude.
In addition can embed gearbox between excitation valve 14 and servomotor 13, thus produce higher excited frequency.Flutter chamber also modularization, as shown in Figure 4.Multiple vibration module 151,152,153,154 structure is identical, is used for producing exciting force.It is connected with excitation valve 156 by contiguous block 155, then by the turnover of excitation valve 156 regulator solution force feed, and then regulate the frequency of vibration module 151,152,153,154 vibration and amplitude to realize synchronous vibration.Thus realize needing selection module number for different.
The hydraulic circuit of the hydraulic vibration exciter 10 of designed mould is the part in the hydraulic system of forcing press 19, shares an oil sources with forcing press 19.When punch 4 starts to extrude workpiece 7, system pressure raises through high-pressure oil pump 16, when pressure reaches the set pressure of overflow valve 18, now overflow valve 18 is opened, fluid enters in exciting loop, control signal makes servomotor 13 must establish rotation of beginning by cable, under the control of excitation valve 10, makes flutter chamber 102,104 produce the vibration of high frequency.
System relevant parameter and experimental study as follows:
Based under Deform simulation analysis, the hot-forming die system relevant parameter of setting is as shown in table 1
table 1 hot forming tool relevant parameter table:
Maximum speed due to motor is 3000 turns/min, and spool both sides have the window that 8 equal and opposite in direction angles are staggered, and embed the gearbox of a 1:2 between motor and spool, therefore theoretical highest frequency is 50 × 2 × 16=1500Hz.The volume ratio in the flutter chamber 104 on the volume in the flutter chamber 102 on vertical plane and horizontal plane is 1:2, and the amplitude of therefore side-to-side vibrations is 1/2 of up-down vibration.Hydraulic vibration exciter relevant parameter is as shown in table 2
Table 2 hydraulic vibration exciter relevant parameter table:
Fig. 6 and Fig. 7 is respectively traditional thermoforming processing and loads high-frequency excitation frequency be about 1000Hz amplitude is 0.005mm, and the stroke load diagram of thermoforming processing when upper and lower amplitude is 0.01mm, the load change trend of two curves is basically identical generally.In the end of a period stage be shaped, under traditional hot extrusion mode, because the frictional force be subject to when blank enters die inner chamber constantly increases, metal flow difficulty, therefore loading force rises very fast.And under flutter fashion of extrusion, due to the high frequency flutter of die, reduce the flow stress of material, and improve the Frotteurism between blank and die, the resistance that metal flows into die reduces, thus makes load remain on a metastable level.As can be seen from the figure, under conventional extruded mode, maximum load is about 244Mpa, and under flutter fashion of extrusion, final load is about 210Mpa, reduces 14%, Be very effective.
Above-described embodiment is only preferred embodiment of the present invention, not limits the scope of the invention according to this, therefore: all equivalence changes done according to structure of the present invention, shape, principle, all should be covered by within protection scope of the present invention.
Claims (6)
1. the multidirectional dither hot-forming die of multimode, comprises patrix, patrix and the guide post for upper and lower mould relative motion guiding, it is characterized in that: the downside of described counterdie is provided with the hydraulic vibration exciter that can carry out dither to multiple directions; The concrete structure of described hydraulic vibration exciter is: in hydraulic vibration exciter outer ring, be provided with excitor, at least one horizontal plane of excitor and at least one vertical plane are respectively arranged with more than one groove, the opening part of each groove is provided with flexible end cap and forms flutter chamber, all flutter chambeies are all communicated with the excitation valve of driven by servomotor by conduit under fluid pressure, and the oil-in of excitation valve is communicated with by conduit with the high-pressure oil outlet of hydraulic press;
The pipeline that described flutter chamber is communicated with excitation valve is provided with the speed change cavity of variable volume;
There are the flutter chamber on horizontal plane and the flutter chamber on vertical plane in described flutter chamber, and the volume ratio in the flutter chamber on the volume in the flutter chamber on vertical plane and horizontal plane is 1:2.
2. the multidirectional dither hot-forming die of multimode according to claim 1, it is characterized in that: be provided with piston in described speed change cavity and speed change cavity be divided into frequency conversion chamber and connecting rod chamber, the connecting rod stretched out outside connecting rod chamber be connected with piston is provided with in connecting rod chamber, by the diverse location of connecting rod adjustable piston in speed change cavity and then the volume size in adjustment frequency conversion chamber, realize the change of vibration frequency.
3. the multidirectional dither hot-forming die of multimode according to claim 1, it is characterized in that: the maximum speed of described servomotor is 3000 turns/min, the spool both sides of described excitation valve have the window that eight equal and opposite in direction angles are staggered, and are connected with the gearbox of a 1:2 between servomotor and spool.
4. the multidirectional dither hot-forming die of multimode according to claim 1, is characterized in that: the concrete structure of described patrix is: punch, on punch cushion block, is fixed on cope match-plate pattern with bolt by punch pad together with punch cushion block and punch trim ring; The concrete structure of described counterdie is: agreed with by the bodily form by die trim ring and die, is fixed on hydraulic vibration exciter outer ring together with die cushion block by bolt, and is finally bolted on lower bolster.
5. the multidirectional dither hot-forming die of multimode according to claim 3, is characterized in that: described hydraulic vibration exciter is arranged between counterdie and lower bolster.
6. the multidirectional dither hot-forming die of the multimode according to any one of claim 1-5, is characterized in that: described hydraulic vibration exciter and the forcing press driving patrix to move up and down share a high-pressure oil pump for its voltage supply.
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| CN103920795B (en) * | 2014-04-02 | 2015-08-26 | 西安交通大学 | A kind of heat expansion vibration combined forming process of solid particle of automobile rear axle housing |
| US9931684B2 (en) | 2014-04-18 | 2018-04-03 | Honda Motor Co., Ltd. | Forming die and method of using the same |
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| CN106244792A (en) * | 2016-07-29 | 2016-12-21 | 哈尔滨工业大学 | A kind of high-power ultrasonics stress relaxation device and the method utilizing its auxiliary titanium alloy foil stress relaxation |
| CN108568469A (en) * | 2017-03-08 | 2018-09-25 | 金华职业技术学院 | A kind of cold extrusion method of bevel gear |
| CN108160820B (en) * | 2017-12-22 | 2019-07-26 | 福建祥鑫股份有限公司 | A kind of nose wind cap aluminium alloy compression-moulding methods |
| CN108562417B (en) * | 2018-07-12 | 2024-02-27 | 北京航天希尔测试技术有限公司 | Pneumatic vibration exciter with adjustable exciting force frequency band |
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| CN102581054A (en) * | 2012-02-29 | 2012-07-18 | 浙江工业大学 | High frequent chattering cold extruding die possessing ejection rod |
| CN203565662U (en) * | 2013-11-06 | 2014-04-30 | 浙江黄岩冲模有限公司 | Multi-module multi-directional high-frequency-vibration hot forming die |
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| CN202667303U (en) * | 2012-06-21 | 2013-01-16 | 浙江工业大学 | Vibrating die for cold extruding |
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| JPS5783322A (en) * | 1980-11-07 | 1982-05-25 | Hokusei Alum Kk | Method of machining die for extruding hollow material, to some angle |
| CN102380517A (en) * | 2011-10-19 | 2012-03-21 | 浙江工业大学 | Multifunctional vibration extrusion die based on electro-hydraulic servo driving |
| CN102397908A (en) * | 2011-11-29 | 2012-04-04 | 浙江工业大学 | High-frequency flutter cold extruding die |
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Denomination of invention: Multi-module multi-directional high frequency vibration hot forming die Effective date of registration: 20190419 Granted publication date: 20151202 Pledgee: Zhejiang Taizhou Huangyan Rural Commercial Bank Co., Ltd. Pledgor: ZHEJIANG HUANGYAN DIE CO., LTD. Registration number: 2019330000109 |
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Date of cancellation: 20220209 Granted publication date: 20151202 Pledgee: Zhejiang Taizhou Huangyan Rural Commercial Bank Co.,Ltd. Pledgor: ZHEJIANG HUANGYAN DIE Co.,Ltd. Registration number: 2019330000109 |