CN114522995A - Ultrasonic auxiliary extrusion device - Google Patents
Ultrasonic auxiliary extrusion device Download PDFInfo
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- CN114522995A CN114522995A CN202210147340.1A CN202210147340A CN114522995A CN 114522995 A CN114522995 A CN 114522995A CN 202210147340 A CN202210147340 A CN 202210147340A CN 114522995 A CN114522995 A CN 114522995A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/004—Extruding metal; Impact extrusion using vibratory energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
Abstract
The application discloses an ultrasonic auxiliary extrusion device, which comprises an extrusion device and an auxiliary device, wherein the extrusion device comprises a driving mechanism, an extrusion rod and an extrusion die, the driving mechanism is connected with the extrusion rod, an installation cavity is formed in the extrusion rod, the extrusion die is provided with an extrusion die cavity for accommodating the extrusion rod and a blank, and the driving mechanism drives the extrusion rod to move in the extrusion die cavity so as to extrude the blank; the auxiliary device comprises a generator and a transducer, the generator is electrically connected with the transducer, the transducer converts electric energy into mechanical vibration, and the transducer is located in the installation cavity. Through the built-in transducer of extrusion stem, not only make things convenient for the resonance design, can also guarantee that ultrasonic strong vibration acts on the blank, make the blank produce plastic deformation more easily, reduced the extrusion deformation resistance of blank, reduce extrusion resistance, prevent the blank fracture, guarantee the quality of extrusion operation, compromise extrusion technology and ultrasonic vibration's resonance design.
Description
Technical Field
The invention relates to the technical field of ultrasonic-assisted forming, in particular to an ultrasonic-assisted extrusion device.
Background
The ultrasonic vibration assisted plastic forming technology is an advanced forming technology which applies transverse or longitudinal ultrasonic vibration to a die or a processed material in the traditional plastic forming process so as to assist in completing various plastic forming by means of ultrasonic energy. In recent years, with the development of ultrasonic technology, the introduction of ultrasonic vibration into a plastic forming process to improve the forming efficiency and quality of products has received much attention.
The existing ultrasonic vibration auxiliary extrusion forming technology is that an ultrasonic vibration system consisting of an ultrasonic transducer and an ultrasonic amplitude transformer is arranged on an extrusion die, and the tail end of the ultrasonic amplitude transformer is connected with a conventional extrusion die into a whole to realize high-frequency vibration. When ultrasonic vibration applyed on extrusion die, the high-efficient vibration that will realize the mould need carry out the resonance design of mould and ultrasonic transducer, however, because the mould die cavity shape is complicated, the resonance design difficulty, vibration distribution is inhomogeneous, leads to being difficult to realize applying ultrasonic vibration to the blank, and ultrasonic vibration's low-usage can't guarantee to continue carrying out high-efficient ultrasonic vibration to blank deformation part in whole extrusion process, and not only so, prior art still is unfavorable for the installation of ultrasonic transducer on the mould.
Therefore, how to consider both the extrusion process and the resonant design of ultrasonic vibration is urgently needed.
Disclosure of Invention
For solving the technical problem how to compromise extrusion technology and ultrasonic vibration's resonance design simultaneously, the aim at of this application provides an ultrasonic wave auxiliary extrusion device, the stripper bar simple structure, the shape is single, find the frequency of resonance easily and realize ultrasonic vibration's resonance design, in the extrusion operation, the blank can contact with stripper bar and extrusion die simultaneously, consequently, through the built-in transducer of stripper bar, not only make things convenient for the resonance design, can also guarantee that ultrasonic strong vibration acts on the blank, make the blank produce plastic deformation more easily, the extrusion deformation resistance of blank has been reduced, reduce extrusion resistance, prevent that the blank from ftracturing, guarantee the quality of extrusion operation, compromise extrusion technology and ultrasonic vibration's resonance design.
In order to achieve the above object, the present application provides an ultrasonic auxiliary extrusion device, which includes an extrusion device and an auxiliary device, wherein the extrusion device includes a driving mechanism, an extrusion rod, and an extrusion die, the driving mechanism is connected to the extrusion rod, an installation cavity is opened inside the extrusion rod, the extrusion die is provided with an extrusion die cavity for accommodating the extrusion rod and a blank, and the driving mechanism drives the extrusion rod to move in the extrusion die cavity to extrude the blank; the auxiliary device comprises a generator, an amplitude transformer and a transducer which are electrically connected, the transducer converts electric energy into mechanical vibration, and the amplitude transformer and the transducer are located in the installation cavity.
The extrusion stem simple structure, the shape is single, find the resonant design of resonant frequency in order to realize ultrasonic vibration easily, increase the amplitude, and, in extrusion operation, the blank can contact with extrusion stem and extrusion die simultaneously, consequently, through the built-in transducer of extrusion stem, not only make things convenient for the resonant design, can also guarantee that ultrasonic strong vibration acts on the blank, make the blank produce plastic deformation more easily, reduce the deformation resistance of extrusion in-process blank, reduce the extrusion resistance, prevent the blank fracture, increase the fine grain layer degree of depth on extrusion surface simultaneously, guarantee the quality of extrusion operation, take into account extrusion technology and ultrasonic vibration's resonant design.
In the continuous extrusion process of the blank, the resonance vibration mode changes, namely the strong part of the ultrasonic vibration changes along with the shortening of the blank, which may result in that the high-frequency resonance of the ultrasonic in the auxiliary device, the extrusion rod and the blank cannot be ensured to continuously act on the concentrated deformation part of the blank. According to the length change of the blank in the extrusion process, the transducers with different resonant frequencies are started, the strong ultrasonic vibration can be ensured to continuously act on the concentrated deformation part of the blank, the ultrasonic loss is reduced, and dislocation motion is promoted after a stress field generated by ultrasonic vibration and a stress field generated by plastic deformation are superposed in the blank, so that the blank is more easily subjected to plastic deformation, the extrusion deformation resistance of the blank is reduced, the extrusion resistance is reduced, and the blank is prevented from cracking.
The amplitude transformer and the transducer can influence the original vibration state of the auxiliary device after being arranged in the extrusion rod, and the unreasonable structural design can not only damage the auxiliary device, but also shorten the service life of the extrusion rod, so that the extrusion rod, the blank and the auxiliary device can generate resonance through modeling simulation as an optional implementation mode of the ultrasonic auxiliary extrusion device. The loss of the extrusion rod and the auxiliary device in the actual extrusion operation process can be reduced to the maximum extent by modeling and simulating the design structure.
When the ultrasonic wave acts on the extrusion rod, the extrusion rod can be subjected to vibration in the extrusion direction and vibration perpendicular to the extrusion direction, in order to enable the vibration direction to be consistent with the extrusion direction, extrusion efficiency and extrusion of blanks are promoted, deformation resistance of the blanks in the extrusion process is reduced, and as a selectable implementation mode of the ultrasonic auxiliary extrusion device, the extrusion rod is provided with a through groove, the through groove extends along the extrusion direction of the extrusion rod, the through groove penetrates through the extrusion rod in the direction perpendicular to the extrusion direction of the extrusion rod, and the through groove inhibits the ultrasonic wave perpendicular to the extrusion direction in the extrusion rod. This reduces the lateral propagation of the ultrasonic waves, and ensures that the ultrasonic waves are mainly concentrated on the material.
The extrusion rod moves in the extrusion die cavity and rubs with the extrusion die, lubricating oil is usually arranged between the extrusion rod and the extrusion die, smooth extrusion operation is guaranteed, the lubricating oil can enter and accumulate in the through groove opposite to the extrusion process, and the lubricating effect is affected, so that the flexible filler is arranged in the through groove as an optional implementation mode of the ultrasonic auxiliary extrusion device. The through groove can restrain the transverse propagation of ultrasonic waves in the extrusion rod, lubricating oil cannot be accumulated, and the resonance design of the extrusion process and the ultrasonic vibration is considered.
As an alternative implementation manner of the ultrasonic auxiliary extrusion device, the filler at least comprises one of flexible materials such as polytetrafluoroethylene, silica gel, F46 resin or asbestos.
As an optional implementation manner of the ultrasonic auxiliary extrusion device, the number of the through grooves is even, and the through grooves are evenly and symmetrically distributed on two sides of the extrusion rod. Therefore, the balance of the whole structure is convenient to guarantee, and resonance design is convenient to carry out.
When the width of the notch of the through groove is too small, transverse vibration cannot be effectively restrained, and when the width of the notch of the through groove is too large, the mass change of the extrusion rod is large, the adverse effect on the whole resonant frequency can be possibly generated, based on simulation calculation, the rationality of the size of the through groove can be determined, and as an optional implementation mode of the ultrasonic auxiliary extrusion device, the length perpendicular to the extrusion direction is wide, and the ratio range of the width of the notch of the through groove to the width of the extrusion rod is 0.08-0.1.
As an alternative implementation manner of the ultrasonic-assisted extrusion device, the connection method of the transducer and the extrusion rod at least includes one of bolt connection, key pin connection, welding, bayonet connection or adhesive bonding.
As an optional realization mode of the ultrasonic auxiliary extrusion device, the extrusion die comprises an extrusion shell and an extrusion die plate, two ends of the extrusion shell are opened, one end of the extrusion shell is used for the extrusion rod to go in and out, the other end of the extrusion shell is detachably connected with the extrusion die plate, and the extrusion shell and the extrusion die plate enclose an extrusion die cavity. Thereby, the replacement of the extrusion die plate is made simple.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a half-section of an exemplary embodiment of an ultrasonic assisted extrusion apparatus;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of an exemplary embodiment of an ultrasonic assisted extrusion apparatus with extrusion stem configuration;
FIG. 4 is a graph of simulated mode shapes of a primary transducer assisted 80mm diameter extrusion stem in an exemplary embodiment of an ultrasonic assisted extrusion device;
FIG. 5 is a graph of simulated mode shapes for an ultrasonic assisted extrusion device in an exemplary embodiment of a secondary transducer assisted extrusion ram having an 80mm diameter;
FIG. 6 is a graph of simulated mode shapes of a three-stage transducer assisted 80mm diameter extrusion stem in an exemplary embodiment of an ultrasonic assisted extrusion device;
FIG. 7 is a graph of simulated mode shapes of a primary transducer assisted 120mm diameter extrusion stem in an exemplary embodiment of an ultrasonic assisted extrusion apparatus;
FIG. 8 is a graph of simulated mode shapes for a two-stage transducer assisted 120mm diameter extrusion stem in an exemplary embodiment of an ultrasonic assisted extrusion apparatus;
FIG. 9 is a graph of simulated mode shapes of a three-stage transducer assisted 120mm diameter extrusion stem in an exemplary embodiment of an ultrasonic assisted extrusion device.
Description of reference numerals:
1. an extrusion device; 11. a drive mechanism; 12. an extrusion stem; 121. a mounting cavity; 122. a through groove; 13. extruding the die; 131. extruding the die cavity; 132. extruding the shell; 133. extruding the template; 14. a first end cap; 15. a second end cap;
2. an auxiliary device; 21. a generator; 22. a transducer; 221. a primary transducer; 222. a secondary transducer; 223. a tertiary transducer;
3. and (5) blank forming.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Referring to fig. 1 and 2, the present application provides an ultrasonic auxiliary extrusion device, which includes an extrusion device 1 and an auxiliary device 2, wherein the extrusion device 1 includes a driving mechanism 11, an extrusion rod 12, and an extrusion die 13, the driving mechanism 11 is connected to the extrusion rod 12, an installation cavity 121 is opened inside the extrusion rod 12, the extrusion die 13 is provided with an extrusion die cavity 131 for accommodating the extrusion rod 12 and a blank 3, and the driving mechanism 11 drives the extrusion rod 12 to move in the extrusion die cavity 131 to extrude the blank 3; the auxiliary device 2 comprises a generator 21, a horn and a transducer 22 electrically connected, the transducer 22 converting electrical energy into mechanical vibrations, the horn and the transducer 22 being located in the mounting chamber 121. A transducer 22 is connected to the extrusion stem 12 and is capable of applying ultrasonic vibrations to the billet 3.
Extrusion stem 12 simple structure, the shape is single, find the resonant design of resonant frequency in order to realize ultrasonic vibration easily, increase the amplitude, and, in extrusion operation, blank 3 can contact with extrusion stem 12 and extrusion die 13 simultaneously, consequently, through extrusion stem 12 built-in transducer 22, not only make things convenient for the resonant design, can also guarantee that ultrasonic strong vibration acts on blank 3, make blank 3 produce plastic deformation more easily, reduce extrusion in-process blank 3's deformation resistance, reduce extrusion resistance, prevent blank 3 fracture, increase the fine grain layer degree of depth on extrusion surface simultaneously, guarantee the quality of extrusion operation, compromise extrusion technology and ultrasonic vibration's resonant design.
It will be appreciated by those skilled in the art that the electrical connections between the generator 21, horn and transducer 22 are of common knowledge and will not be described in this application.
Preferably, the installation cavity 121 is arranged at the position of the central shaft of the extrusion rod 12, so that the balance of the whole structure can be ensured, and the resonance design is facilitated.
Since the resonance mode of the blank 3 may change during the continuous extrusion process, that is, the strong ultrasonic vibration part changes as the blank 3 shortens, which may result in that it may not be ensured that the high-frequency resonance of the ultrasonic waves in the auxiliary device 2, the extrusion ram 12 and the blank 3 continuously acts on the concentrated deformation part of the blank 3, as an alternative embodiment of the ultrasonic auxiliary extrusion device, the auxiliary device 2 at least comprises two generators 21 and corresponding amplitude transformer and transducer 22, the resonance frequency of the transducer 22 is different, and different transducers 22 are turned on according to the length of the blank 3. According to the length change of the blank 3 in the extrusion process, the transducers 22 with different resonant frequencies are started, the strong ultrasonic vibration can be ensured to continuously act on the concentrated deformation part of the blank 3, the ultrasonic loss is reduced, and after the stress field generated by the ultrasonic vibration and the stress field generated by the plastic deformation are superposed in the blank 3, the dislocation motion is promoted, so that the blank 3 is easier to generate the plastic deformation, the extrusion deformation resistance of the blank 3 is reduced, the extrusion resistance is reduced, and the cracking of the blank 3 is prevented.
The extrusion die can be used for extrusion operation and can also be used for extrusion operation, and products with various shapes can be obtained by changing the type of the extrusion die 13.
The amplitude transformer and the transducer 22 can affect the original vibration state of the auxiliary device 2 after being installed in the extrusion rod 12, and the unreasonable structural design can not only damage the auxiliary device 2, but also shorten the service life of the extrusion rod 12, so that the extrusion rod 12, the blank 3 and the auxiliary device 2 can generate resonance through modeling simulation as an alternative embodiment of the ultrasonic auxiliary extrusion device. The loss of the extrusion rod 12 and the auxiliary device 2 in the actual extrusion operation process can be reduced to the maximum extent by modeling and simulating the design structure.
Referring to fig. 1 and 3, when ultrasonic waves act on the extrusion stem 12, the extrusion stem 12 is subjected to vibration in the extrusion direction and vibration perpendicular to the extrusion direction, in order to make the vibration direction consistent with the extrusion direction, to promote extrusion efficiency and extrusion of the billet 3, and to reduce deformation resistance of the billet 3 during extrusion, as an alternative embodiment of the ultrasonic auxiliary extrusion device, the extrusion stem 12 is provided with a through groove 122, the through groove 122 extends along the extrusion direction of the extrusion stem 12, the through groove 122 penetrates through the extrusion stem 12 in a direction perpendicular to the extrusion direction of the extrusion stem 12, and the through groove 122 inhibits the ultrasonic waves perpendicular to the extrusion direction in the extrusion stem 12. This reduces the lateral propagation of the ultrasonic waves, and ensures that the ultrasonic waves are mainly concentrated on the material 3.
The extrusion rod 12 moves in the extrusion die cavity 131 and rubs against the extrusion die 13, and there is usually lubricating oil between the extrusion rod 12 and the extrusion die 13 to ensure smooth extrusion, and the lubricating oil may enter and accumulate in the through groove 122 against the extrusion process to affect the lubricating effect, so as to provide an alternative embodiment of the ultrasonic auxiliary extrusion device, the through groove 122 is provided with a flexible filler. The through grooves 122 are filled with a flexible filler, so that the through grooves 122 can suppress lateral propagation of ultrasonic waves in the extrusion stem 12, and can achieve both the extrusion process and the resonance design of ultrasonic vibration without accumulating lubricating oil.
As an alternative embodiment of the ultrasonic-assisted extrusion device, the filler at least comprises one of flexible materials such as polytetrafluoroethylene, silica gel, F46 resin or asbestos.
As an alternative embodiment of the ultrasonic-assisted extrusion device, the number of the through slots 122 is even and symmetrically distributed on both sides of the extrusion stem 12. Therefore, the balance of the whole structure is convenient to guarantee, and resonance design is convenient to carry out.
Referring to fig. 3, Z is the diameter of the extrusion stem 12, X is the notch width of the through groove 122, Y is the transverse distance between the mounting cavity 121 and the through groove 122, when the notch width of the through groove 122 is too small, the transverse vibration cannot be effectively suppressed, and when the notch width of the through groove 122 is too large, the mass change of the extrusion stem 12 is large, which may have an adverse effect on the overall resonant frequency, and based on simulation calculation, the rationality of the size of the through groove 122 may be determined, and the length perpendicular to the extrusion direction is defined as wide, and as an alternative embodiment of the ultrasonic auxiliary extrusion device, the ratio of the notch width of the through groove 122 to the width of the extrusion stem 12 ranges from 0.08 to 0.1. For example, when Z is 80mm, X is 8mm and Y is 20 mm; when Z is 120mm, X is 10mm and Y is 30 mm.
Referring to fig. 1 to 9, in a specific embodiment, the material of the billet 3 is 6063 wrought aluminum alloy, the length of the billet 3 is 120cm, the ultrasonic auxiliary extrusion device comprises three generators 21 and corresponding amplitude transformer and transducers 22, and the three transducers 22 are a primary transducer 221, a secondary transducer 22222 and a tertiary transducer 223 respectively. Through modeling simulation, frequency analysis is carried out, and the integral structure of the auxiliary device 2, the extrusion rod 12 and the blank 3 after connection can still generate good resonance in the working frequency range. The simulated mode shapes when Z is 80mm, X is 8mm and Y is 20mm are shown in FIG. 4, FIG. 5 and FIG. 6; the simulated vibration patterns when Z is 120mm, X is 10mm, and Y is 30mm are shown in FIGS. 7, 8, and 9, where the colors from light to dark (cyan to magenta) show that the distribution of the vibration frequencies is concentrated. As can be observed with reference to fig. 4 to 9, the ultrasonic vibrations are mainly concentrated in the blank 3.
Performing structural design according to a simulation result, connecting and fixing each level of transducer 22 and an extrusion rod 12, respectively connecting the extrusion rods 12 with the diameters of 80mm and 120mm with a driving mechanism 11, starting an auxiliary device 2, setting parameters of a generator 21, respectively setting power to be 0W and 1200W, performing ultrasonic pulse interval 2s for 6s, placing a blank 3 in an extrusion die cavity 131, extruding the blank 3 by the extrusion rods 12, then controlling each level of transducer 22 along with the length change of the blank 3, in the embodiment, starting a first level transducer 221 when extrusion is started, closing the first level transducer 221 when the length of the blank 3 is 50 cm-100 cm, starting a second level transducer 22222, closing the second level transducer 22222 when the length of the blank 3 is less than 50cm, starting a third level transducer 223, and finally extruding the blank 3.
After the section bar is cooled, the section bar is taken out, microstructure observation is carried out, and the grain size of the blank 3 under different generator 21 powers is shown in table 1:
through tests, when the diameter of the extrusion rod 12 is 80mm, the extrusion force required by the ultrasonic auxiliary extrusion device is reduced by 20% compared with that required by the traditional extrusion forming; when the diameter of the extrusion rod 12 is 120mm, the extrusion force required by the ultrasonic auxiliary extrusion device is reduced by 15% compared with the traditional extrusion forming. The ultrasonic auxiliary extrusion device effectively reduces extrusion resistance.
As an alternative embodiment of the ultrasonic auxiliary extrusion device, referring to fig. 2, the mounting cavity 121 is stepped, and an end cover is disposed in the mounting cavity 121, in a specific embodiment, the primary transducer 221 is connected to the extrusion stem 12 in the mounting cavity 121, the secondary transducer 22222 is connected to the extrusion stem 12 through the first end cover 14, and the tertiary transducer 223 is connected to the extrusion stem 12 through the second end cover 15.
As an alternative embodiment of the ultrasonic-assisted compression device, the transducer 22 may be coupled to the compression rod 12 by at least one of a screw connection, a keyed connection, a weld, a bayonet connection, or an adhesive bond.
As an alternative embodiment of the ultrasonic-assisted extrusion device, the shape of the extrusion rod 12 includes at least one of a cylinder or a prism. The extrusion rod 12 is simple in structure and convenient for resonance design.
As an alternative embodiment of the ultrasonic-assisted extrusion apparatus, referring to fig. 1, the extrusion die 13 includes an extrusion housing 132 and an extrusion die plate 133, the extrusion housing 132 is open at two ends, one end of the extrusion housing 132 is used for the extrusion rod 12 to enter and exit, the other end of the extrusion housing is detachably connected to the extrusion die plate 133, and the extrusion housing 132 and the extrusion die plate 133 enclose an extrusion die cavity 131. Thereby, the replacement of the pressing die plate 133 is made simple.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. An ultrasonic assisted extrusion device, comprising:
the extrusion device comprises a driving mechanism, an extrusion rod and an extrusion die, wherein the driving mechanism is connected with the extrusion rod, an installation cavity is formed in the extrusion rod, the extrusion die is provided with an extrusion die cavity for accommodating the extrusion rod and a blank, and the driving mechanism drives the extrusion rod to move in the extrusion die cavity so as to extrude the blank;
the auxiliary device comprises a generator, an amplitude transformer and a transducer which are electrically connected, the transducer converts electric energy into mechanical vibration, and the amplitude transformer and the transducer are located in the installation cavity.
2. An ultrasonic assisted extrusion apparatus as claimed in claim 1 wherein the auxiliary apparatus comprises at least two generators and corresponding horns and transducers, the transducers having different resonant frequencies and being switched on according to the length of the billet.
3. An ultrasonic assisted extrusion apparatus as claimed in claim 1 wherein the extrusion stem, billet and auxiliary means are brought into resonance by modelling simulation.
4. The ultrasonic-assisted extrusion device of claim 1, wherein the extrusion stem is formed with a through-slot extending in the extrusion direction of the extrusion stem, the through-slot extending through the extrusion stem in a direction perpendicular to the extrusion direction of the extrusion stem, the through-slot inhibiting ultrasonic waves in the extrusion stem perpendicular to the extrusion direction.
5. An ultrasonic assisted extrusion apparatus as claimed in claim 4 wherein the through slot is filled with a flexible filler.
6. An ultrasonically assisted extrusion device according to claim 5 wherein the filler comprises at least one of a flexible material such as polytetrafluoroethylene, silicone, F46 resin or asbestos.
7. An ultrasonic assisted extrusion apparatus as claimed in claim 4 wherein the number of through slots is even and symmetrically distributed on both sides of the extrusion stem.
8. The ultrasonic-assisted extrusion device of claim 4 wherein the length perpendicular to the extrusion direction is wide, and the ratio of the width of the slot of the through slot to the width of the extrusion stem is in the range of 0.08 to 0.1.
9. An ultrasonic assisted extrusion apparatus as claimed in claim 1 wherein the transducer is connected to the extrusion stem by at least one of a screw connection, a key pin connection, welding, bayonet connection or adhesive bonding.
10. The ultrasonic auxiliary extrusion device as claimed in claim 1, wherein the extrusion die comprises an extrusion housing and an extrusion die plate, the extrusion housing is open at two ends, one end of the extrusion housing is used for the extrusion rod to enter and exit, the other end of the extrusion housing is detachably connected with the extrusion die plate, and the extrusion housing and the extrusion die plate enclose an extrusion die cavity.
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| CN203124460U (en) * | 2013-01-22 | 2013-08-14 | 东南铝业有限公司 | Ultrasonic-assisted extrusion forming device for aluminum alloy profile |
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| CN104174677A (en) * | 2014-07-16 | 2014-12-03 | 深圳大学 | Magnesium alloy ultrasonic wave micro extrusion formed refined grain technology at normal temperature |
| CN204321507U (en) * | 2014-12-09 | 2015-05-13 | 苏州科技学院 | A kind of single-electrical signal excitation ultrasonic elliptical vibratory extruding machining apparatus |
| WO2020076276A2 (en) * | 2018-10-11 | 2020-04-16 | Gazi̇antep Üni̇versi̇tesi̇ Rektörlüğü | An ultrasonic-assisted mold system for deep drawing process and operating method thereof |
| CN110842043A (en) * | 2019-12-05 | 2020-02-28 | 河南理工大学 | Longitudinal-torsional composite ultrasonic auxiliary extrusion method and device |
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