CN102397908B - High-frequency flutter cold extruding die - Google Patents
High-frequency flutter cold extruding die Download PDFInfo
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- CN102397908B CN102397908B CN201110388454.7A CN201110388454A CN102397908B CN 102397908 B CN102397908 B CN 102397908B CN 201110388454 A CN201110388454 A CN 201110388454A CN 102397908 B CN102397908 B CN 102397908B
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Abstract
The invention discloses a high-frequency flutter cold extruding die, which comprises a forming mechanism. A male die is fixedly connected with an upper template; a female die is positioned under the male die and is arranged in a female die sleeve; a flutter generation mechanism comprises a vibration table and a high-frequency valve, wherein the vibration table comprises an upper plate and a lower plate; a lug boss is arranged in the middle of the upper plate and is fixedly connected with the female die sleeve; a vertically-symmetrical annular groove is arranged on the upper plate around the lug boss; the section of the annular groove is in an arc shape; a lower groove is arranged in the middle of the upper surface of the lower plate and is communicated with an annular groove on the lower surface of the lower plate; the upper plate is in fixed sealing connection with the lower plate through a fastener; the fastener is positioned at an outer circle of the annular groove; the lower plate is provided with an oil passage through which hydraulic oil enters or exits; one end of the oil passage is communicated with the lower groove; the other end of the oil passage is communicated with the high-frequency valve; and the lower plate is fixedly connected with a lower template. According to the high-frequency flutter cold extruding die disclosed by the invention, enough vibration output force, higher vibration frequency and lower amplitude can be provided; and dimensional precision of complex parts can be ensured while the vibrated extrusion of the complex parts are finished.
Description
Technical field
The present invention relates to a kind of cold extrusion die.
Background technology
Along with the develop rapidly of Chinese Automobile Industry ', the batch of auto parts and components is increasing, and cold extruding technique is also showed one's capabilities at this, and increasing auto parts and components require to change cold extrusion into by Cutting Process and process.Compare with machining part, cold-extruded part has continuous metallic fiber streamline and higher mechanical strength, especially in automobile, apply more Tooth Profile Parts, its profile of tooth does not substantially need processing or only just leaves the processing capacity of grinding after cold extrusion, and stock utilization and production efficiency high, product quality is also comparatively stable.
Yet, in cold extrusion, add man-hour, due to material high flow stress at room temperature, at blank, be shaped at the end, resistance of deformation sharply rise (can reach 2000MP even higher), frictional force between mould and blank also hampers flowing of metal stock simultaneously, and moreover, high resistance of deformation and frictional force are also stricter for the tonnage of forcing press and the requirement of mould.
Since resistance of deformation when having disclosed first additional Under Ultrasonic Vibration kinetic energy and reduce the plastic deformation of monocrystal zinc, many scholars of countries in the world for vibration the application in Metal Forming carried out deep theoretical and experimental study.Up to now, people in the drawing of wire rod, tubing and heterotypic material, the experiment of vibration processing was all carried out in the punching of metal material, shearing, pressure-sizing, rolling etc.The mode of the exciting adopting mainly be take high-power ultrasonics (being called power sound wave) vibration as main.But because ultrasonic wave is subject to the restriction of power output, fail to provide enough large power output, can not meet the requirement of the large scales such as gear " difficult formation of parts " vibration-extrusion.
Based on hydraulically powered mode of vibration, can provide enough large power output, but conventional hydraulic vibration is to be moved back and forth and produced vibration by hydraulic cylinder piston, because having certain quality, piston adds load, the high brief acceleration of frequency is large, inertia force and damping force are all very large, need great restoring force to overcome inertia force and vibrate, therefore, realize dither difficulty very large.In addition, the vibration amplitude producing due to reciprocating motion of the pistons is conventionally larger, and the dimensional accuracy of drip molding is difficult to be guaranteed.
Summary of the invention
In order to overcome can not realize large scale part dither and the size of formed part precision of existing high frequency cold extrusion die, fail guaranteed deficiency, the invention provides a kind of large vibration power output, higher vibration frequency and less amplitude of providing enough, when completing complex parts vibration-extrusion and can guarantee the high-frequency flutter cold extruding die of its dimensional accuracy.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of high-frequency flutter cold extruding die, comprise builder, described builder comprises punch and die, described punch is fixedly connected with cope match-plate pattern, described die be positioned at punch under, described die is arranged in die case, described high-frequency flutter cold extruding die also comprises flutter generating mechanism, described flutter generating mechanism involving vibrations platform and high frequency valve, described shake table comprises upper plate and lower plate, the middle part of described upper plate is provided with boss, described boss is fixedly connected with die case, described boss upper plate is around offered laterally zygomorphic annular groove, the cross section of described annular groove is curved, the upper surface middle part of described lower plate is provided with low groove, described low groove is communicated with the annular groove of described lower plate lower surface, described upper plate and lower plate are fixed by securing member and are tightly connected, described securing member is positioned at the outer ring of described annular groove, described lower plate is provided with the oil duct for hydraulic oil turnover, one end of described oil duct is communicated with described low groove, the other end of described oil duct is communicated with high frequency valve, described lower plate is fixedly connected with lower bolster.
As preferred a kind of scheme: described boss upper surface is provided with T-slot, and described die case is bolted in described T-slot.
Further, the cross section semicircular in shape of described annular groove, the low groove cross section of described lower plate is rounded.
Further again, described punch is placed in lining, and described lining is fixedly connected with cope match-plate pattern by disk nut, and described cope match-plate pattern top is provided with cushion block; Described die is provided with circle stress outward, and die is fixed in die case by gland nut, and described die bottom is provided with lower cushion block.
Cope match-plate pattern is provided with pilot hole, and described die shoe is provided with lower pilot hole, and guide pillar is respectively through described upper pilot hole and lower pilot hole.
Technical conceive of the present invention is: by high frequency valve, control frequency and the pressure of oil-feed and oil return, can realize upper plate projection section with certain frequency and amplitude up-down vibration.
During work, fix mould and flutter platform.In moulding section extrusion sections, shake table is also worked, so that the flutter of certain frequency and amplitude to be provided.Because the amplitude of flutter is small, can not affect the dimension precision requirement of drip molding.In addition, the material when flutter of high frequency is conducive to part forming flows, and can improve friction condition and reduce flow stress, thereby reaches the object of antifriction load shedding.
From technique scheme, can find out.The mould the present invention relates to is mainly grouped into by shaped portion and flutter generating unit.Can realize the high frequency flutter extruding of the complex parts such as gear, thereby overcome the complex parts deficiency that material flow stress is high, frictional force is large and equipment requirement is high in traditional cold extruding.
Beneficial effect of the present invention is mainly manifested in: (1) is simple in structure, cost is low.The present invention is in conventional extruded Equipment Foundations, and increasing by a flutter generator can realize, simple in structure.Adopt threeway high frequency valve as the controller of flutter generator, what developed is comparatively ripe, and price is also lower.
(2) vibration frequency is high.High frequency flutter device of the present invention is that high-frequency ac liquid stream acts directly on the oscillating plate that elastic stiffness is larger, make elastic vibration plate produce vibration, only need part overcome the inertia force of load and there is no damping force, relend the elastic-restoring force that helps flexible member very large, can realize very high vibration frequency, thereby reach the effect of flutter.
(3) power density, High power output.The ultrasonic wave of comparing, electromagnetic type exciting generator, this electrohydraulic fluttering device only by flutter cylinder with exchange valve and form, volume is very little, but can export larger power, high more a lot of than the power of the electromagnetic vibrator of same volume, and can export enough large vibration force.
(4) amplitude is little.Compare and conventional hydraulic vibration, this high frequency flutter device makes, on high frequency liquid stream direct effect and oscillating plate, due to the stress-strain characteristics of oscillating plate material self, can realize the vibration that amplitude is very little, can reach micron order at present.Small due to amplitude, therefore can not affect the dimensional accuracy of drip molding.
Accompanying drawing explanation
Fig. 1 is vibration-extrusion die structure dwg.
Fig. 2 is vibration-extrusion mould die top view.
Fig. 3 is flutter generating mechanism structure chart.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the A portion schematic diagram of Fig. 3.
Fig. 6 is high frequency flutter device oil-feed view.
Fig. 7 is the fuel-displaced view of high frequency flutter device.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
With reference to Fig. 1～Fig. 7, a kind of high-frequency flutter cold extruding die, comprise builder, described builder comprises punch 3 and die 6, described punch 3 is fixedly connected with cope match-plate pattern 1, described die 6 be positioned at punch 3 under, described die 6 is arranged in die case 9, described high-frequency flutter cold extruding die also comprises flutter generating mechanism, described flutter generating mechanism involving vibrations platform and high frequency valve, described shake table comprises upper plate 10 and lower plate 11, the middle part of described upper plate 10 is provided with boss, described boss is fixedly connected with die case 9, described boss upper plate is around offered laterally zygomorphic annular groove 14, the cross section of described annular groove 14 is curved, the upper surface middle part of described lower plate 11 is provided with low groove, described low groove is communicated with the annular groove 14 of described lower plate lower surface, described upper plate 10 is fixed by securing member and is tightly connected with lower plate 11, described securing member is positioned at the outer ring of described annular groove 14, described lower plate 11 is provided with the oil duct 16 for hydraulic oil turnover, one end of described oil duct 16 is communicated with described low groove, the other end of described oil duct 16 is communicated with high frequency valve, described lower plate 11 is fixedly connected with lower bolster 13.
Described boss upper surface is provided with T-slot 17, and described die case 9 is bolted in described T-slot 17.
The cross section semicircular in shape of described annular groove 14, the low groove cross section of described lower plate 11 is rounded.
Described punch 3 is placed in lining 4, and described lining 4 is fixedly connected with cope match-plate pattern 1 by disk nut 5, and punch 3 tops are provided with cushion block 2, and described die 6 is outer is provided with circle stress 7, and die 6 is fixed in die case 9 by gland nut 8.
Cope match-plate pattern is provided with pilot hole, and described die shoe is provided with lower pilot hole, and guide pillar 12 is respectively through described upper pilot hole and lower pilot hole.
During work, in the time of punch 3 extrusion sections, flutter generating mechanism gives the vibration of die with certain frequency and amplitude, thereby reaches the object of vibration-extrusion, because the amplitude of high frequency flutter can arrive micron order, therefore can not affect the dimensional accuracy of drip molding.
Fig. 3～Fig. 5 is flutter generating mechanism structure chart, and described flutter generating mechanism is comprised of upper and lower plates two parts.Upper plate 10 is the plectane with boss.At boss, offer laterally zygomorphic annular groove 14 around, boss surface is provided with 6 uniform T-slots 17, in order to fixed mould.Lower plate 11 upper surfaces are provided with low groove, make it and upper plate between have certain space.Lower plate 11 1 sides are provided with oil duct 16, for hydraulic oil, enter (returning) oil.Upper and lower plates closely connects by 20 pieces of bolts, and guarantees its sealing by sealing ring 15.During work, hydraulic oil enters the space between upper and lower plates by oil duct, and its pressure is increased rapidly.Due to the existence of groove 14, upper plate boss portion branch forces upwards skew; When hydraulic oil flows out the space between upper and lower plates, its pressure is got back to normality, and upper plate projection section is got back to again initial position.By the control of high frequency valve, can realize upper plate projection section with certain frequency and amplitude up-down vibration, thereby reach the object of high frequency flutter extruding.
Fig. 6 and Fig. 7 are flutter device turnover oil condition schematic diagram, and system is comprised of hydraulic oil source, high frequency valve I and shake table II.In hydraulic valve, the rotation of spool 19 is by driven by servomotor, the valve port area size that the groove circumferentially evenly offered along spool land is matched with window on valve pocket 18 becomes cyclically-varying, due to the groove mutual dislocation on adjacent shoulder, thereby make to pass in and out the variation of uninterrupted and the direction generating period of flutter cylinder.During work, when spool goes to the position shown in Fig. 6, P-A conducting, pressure oil enters shake table, and the distortion of shake table upper plate projection section is outstanding; When spool goes to the position shown in Fig. 7, A-T conducting, hydraulic oil flows out shake table, and upper plate projection section elastic tip is replied.The operating frequency f of high frequency flutter device equals to exchange the valve core rotation speed n of valve and the product that often turns break-make number of times m between valve core notch and valve pocket window.If valve core notch is counted Z
1with valve pocket window number Z
2equate, all valve port opens and closes simultaneously, is referred to as open-shed, and the break-make number of times that valve core often turns is valve core notch and counts Z
1, flow area is whole valve port area sums, can pass through larger flow.If valve core notch is counted Z
1with valve pocket window number Z
2unequal, when spool turns over certain angle, part valve port is opened, and is part open-type.The circulation area of part open-type is less than open, but by increasing width of rebate, can meet the amplitude requirement of flutter device.The adjusting that the amplitude of flutter device can be realized by the axial actuating mechanism of valve core.
Claims (5)
1. a high-frequency flutter cold extruding die, comprise builder, described builder comprises punch and die, described punch is fixedly connected with cope match-plate pattern, described die be positioned at punch under, described die is arranged in die case, it is characterized in that: described high-frequency flutter cold extruding die also comprises flutter generating mechanism, described flutter generating mechanism involving vibrations platform and high frequency valve, described shake table comprises upper plate and lower plate, the middle part of described upper plate is provided with boss, described boss is fixedly connected with die case, described boss upper plate is around offered laterally zygomorphic annular groove, the cross section of described annular groove is curved, the upper surface middle part of described lower plate is provided with low groove, described low groove is communicated with the annular groove of described upper plate lower surface, described upper plate and lower plate are fixed by securing member and are tightly connected, described securing member is positioned at the outer ring of described annular groove, described lower plate is provided with the oil duct for hydraulic oil turnover, one end of described oil duct is communicated with described low groove, the other end of described oil duct is communicated with high frequency valve, described lower plate is fixedly connected with lower bolster.
2. high-frequency flutter cold extruding die as claimed in claim 1, is characterized in that: described boss upper surface is provided with T-slot, and described die case is bolted in described T-slot.
3. high-frequency flutter cold extruding die as claimed in claim 1 or 2, is characterized in that: the cross section semicircular in shape of described annular groove, the low groove cross section of described lower plate is rounded.
4. high-frequency flutter cold extruding die as claimed in claim 1 or 2, it is characterized in that: described punch is placed in lining, described lining is fixedly connected with cope match-plate pattern by disk nut, described cope match-plate pattern top is provided with cushion block, described die is provided with circle stress outward, die is fixed in die case by gland nut, and described die bottom is provided with lower cushion block.
5. high-frequency flutter cold extruding die as claimed in claim 1 or 2, is characterized in that: described cope match-plate pattern is provided with pilot hole, and lower bolster is provided with lower pilot hole, and guide pillar is respectively through described upper pilot hole and lower pilot hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110388454.7A CN102397908B (en) | 2011-11-29 | 2011-11-29 | High-frequency flutter cold extruding die |
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| CN201110388454.7A CN102397908B (en) | 2011-11-29 | 2011-11-29 | High-frequency flutter cold extruding die |
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| CN102397908A CN102397908A (en) | 2012-04-04 |
| CN102397908B true CN102397908B (en) | 2014-03-26 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699092B (en) * | 2012-06-04 | 2014-03-26 | 扬州市管件厂有限公司 | Vibration type seamless three-way pipe cold extrusion forming die |
| CN103447339A (en) * | 2013-08-23 | 2013-12-18 | 浙江工业大学 | Triaxial high-frequency composite flutter cold extrusion die |
| CN103611793B (en) * | 2013-11-06 | 2015-12-02 | 浙江黄岩冲模有限公司 | The multidirectional dither hot-forming die of multimode |
| CN104289545B (en) * | 2014-09-23 | 2016-04-13 | 浙江工业大学 | A kind of electric-liquid type flutter platform for cold extrusion vibration machining |
| CN104525601B (en) * | 2014-12-16 | 2016-05-25 | 西安交通大学 | A kind of vertical mechanical vibrating hydraulic extruder |
| CN104841714B (en) * | 2015-05-04 | 2017-01-04 | 浙江工业大学 | Three-D high frequency flutter cold extruding die |
| CN104841715B (en) * | 2015-05-04 | 2017-01-04 | 浙江工业大学 | Cold extrusion three-D high frequency is combined tremor mould |
| CN107597936B (en) * | 2017-10-18 | 2019-06-25 | 大连理工大学 | Oscillatory type auto parts stamping device and the method for carrying out punching press using the device |
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| DE1929558A1 (en) * | 1969-06-11 | 1970-12-17 | Ibm Deutschland | Cold extrusion press |
| CN1270943A (en) * | 1999-04-20 | 2000-10-25 | 李艳晖 | Vibrating refractory material forming process by gypsum mold |
| CN101947846A (en) * | 2010-09-16 | 2011-01-19 | 大连理工大学 | Ultrasonic vibration microtube extrusion mould |
| CN201735620U (en) * | 2010-03-25 | 2011-02-09 | 昆山凯意工模具配套有限公司 | Cold extrusion forming die for part |
| CN202366981U (en) * | 2011-11-29 | 2012-08-08 | 浙江工业大学 | High-frequency flutter cold extrusion die |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5558774B2 (en) * | 2009-10-09 | 2014-07-23 | 株式会社Ｕａｃｊ | Extrusion processing apparatus and extrusion processing method |
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- 2011-11-29 CN CN201110388454.7A patent/CN102397908B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1929558A1 (en) * | 1969-06-11 | 1970-12-17 | Ibm Deutschland | Cold extrusion press |
| CN1270943A (en) * | 1999-04-20 | 2000-10-25 | 李艳晖 | Vibrating refractory material forming process by gypsum mold |
| CN201735620U (en) * | 2010-03-25 | 2011-02-09 | 昆山凯意工模具配套有限公司 | Cold extrusion forming die for part |
| CN101947846A (en) * | 2010-09-16 | 2011-01-19 | 大连理工大学 | Ultrasonic vibration microtube extrusion mould |
| CN202366981U (en) * | 2011-11-29 | 2012-08-08 | 浙江工业大学 | High-frequency flutter cold extrusion die |
Non-Patent Citations (1)
| Title |
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| JP特开2011-79046A 2011.04.21 |
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| CN102397908A (en) | 2012-04-04 |
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