阅读说明：本技术 一种多向复合超声振动辅助挤压成形加工设备及成形方法 (Multidirectional composite ultrasonic vibration auxiliary extrusion forming processing equipment and forming method ) 是由 韩光超 沈豫楚 张召臣 程健峰 张海鸥 王桂兰 孙明 于 2019-09-16 设计创作，主要内容包括：本发明提供一种多向复合超声振动辅助挤压成形加工设备,包括上压板、下压板、双换能器超声振动平台和至少一个超声振动系统,上压板和下压板相对设置,双换能器超声振动平台固定于上压板,下压板上设有挤压成形模具,超声振动系统固定在挤压成形模具周围,双换能器超声振动平台包括超声变幅器,超声变幅器的下端面至少设有一个竖向挤压工具,超声振动系统包括变幅杆,变幅杆末端设有横向挤压工具,通过分别控制双换能器超声振动平台和超声振动系统可实现多向复合超声振动辅助挤压成形加工。本发明的有益效果：通过在较小的空间高度内安装双换能器超声振动平台和多个超声振动系统,实现对待成型工件进行多向超声辅助挤压成形加工。(The invention provides a multidirectional composite ultrasonic vibration auxiliary extrusion forming processing device which comprises an upper pressing plate, a lower pressing plate, a double-transducer ultrasonic vibration platform and at least one ultrasonic vibration system, wherein the upper pressing plate and the lower pressing plate are oppositely arranged, the double-transducer ultrasonic vibration platform is fixed on the upper pressing plate, an extrusion forming die is arranged on the lower pressing plate, the ultrasonic vibration system is fixed around the extrusion forming die, the double-transducer ultrasonic vibration platform comprises an ultrasonic amplitude transformer, at least one vertical extrusion tool is arranged on the lower end face of the ultrasonic amplitude transformer, the ultrasonic vibration system comprises an amplitude transformer, a transverse extrusion tool is arranged at the tail end of the amplitude transformer, and multidirectional composite ultrasonic vibration auxiliary extrusion forming processing can be realized by respectively controlling the double-transducer ultrasonic vibration platform and the ultrasonic vibration system. The invention has the beneficial effects that: the bidirectional ultrasonic auxiliary extrusion forming processing of the workpiece to be formed is realized by mounting the double-transducer ultrasonic vibration platform and the plurality of ultrasonic vibration systems in a small space height.)

1. The utility model provides a multidirectional compound ultrasonic vibration assists extrusion moulding processing equipment which characterized in that: including top board, holding down plate, double-transducer ultrasonic vibration platform and at least one ultrasonic vibration system, the top board with the holding down plate sets up relatively, double-transducer ultrasonic vibration platform is fixed in the top board, be equipped with the extrusion forming mould on the holding down plate, ultrasonic vibration system fixes around the extrusion forming mould, double-transducer ultrasonic vibration platform includes the supersound amplitude transformer, the lower terminal surface of supersound amplitude transformer is equipped with a vertical extrusion tool at least, the ultrasonic vibration system includes the amplitude transformer, the amplitude transformer end is equipped with horizontal extrusion tool, double-transducer ultrasonic vibration platform is used for the drive vertical extrusion tool produces ultrasonic vibration in vertical direction, the ultrasonic vibration system is used for the drive horizontal extrusion tool produces ultrasonic vibration on the horizontal direction.

2. The multidirectional combined ultrasonic vibration-assisted extrusion molding apparatus as set forth in claim 1, wherein: the double-transducer ultrasonic vibration platform further comprises two ultrasonic transducers and two ultrasonic amplitude-change rods, the left end and the right end of each ultrasonic amplitude-change rod are respectively connected with one end of each ultrasonic amplitude-change rod, the other end of each ultrasonic amplitude-change rod is respectively connected with one ultrasonic transducer, and the double-transducer ultrasonic vibration platform is a linear structure which is bilaterally symmetrical with the ultrasonic amplitude-change rods as the center.

3. The multidirectional combined ultrasonic vibration-assisted extrusion molding apparatus as set forth in claim 2, wherein: the ultrasonic horn is a porous ultrasonic horn, a plurality of blind holes are formed in the lower end face of the ultrasonic horn, and the vertical extruding tool is fixed to the lower end face of the ultrasonic horn through the blind holes.

4. The multidirectional combined ultrasonic vibration-assisted extrusion molding apparatus as set forth in claim 1, wherein: and a forming cavity is arranged in the extrusion forming die, and a workpiece to be formed is placed in the forming cavity.

5. The multidirectional combined ultrasonic vibration-assisted extrusion molding apparatus as set forth in claim 1, wherein: the automatic feeding device is characterized by further comprising a rack, the upper pressing plate and the lower pressing plate are located in the rack, a driving device is arranged above the rack, an output shaft of the driving device is connected with a lead screw, the lead screw is connected with the upper pressing plate, the driving device is used for driving the lead screw to rotate, and the lead screw drives the upper pressing plate to ascend or descend.

6. The multidirectional combined ultrasonic vibration-assisted extrusion molding apparatus as set forth in claim 5, wherein: and a fixing rod extending downwards is arranged at the upper end of the rack, and the ultrasonic vibration system is fixed around the extrusion forming die through the fixing rod.

7. A multidirectional combined ultrasonic vibration assisted extrusion molding apparatus as set forth in claim 3, wherein: the vertical extrusion tool and the horizontal extrusion tool are stepped cylinders.

8. The multidirectional combined ultrasonic vibration-assisted extrusion molding apparatus according to claim 7, wherein: the side surface and the top surface of the extrusion forming die are both provided with a plurality of insertion holes, the hole diameter of each insertion hole is the same as the outer diameter of the tail ends of the vertical extrusion tool and the transverse extrusion tool, and the insertion holes on the side surface and the top surface of the extrusion forming die are both communicated with the forming cavity.

9. The multidirectional combined ultrasonic vibration-assisted extrusion molding apparatus as set forth in claim 1, wherein: all the ultrasonic vibration systems and the double-transducer ultrasonic vibration platform are respectively connected with an ultrasonic vibration power supply and driven by the corresponding ultrasonic vibration power supply.

10. A method of forming a multidirectional combined ultrasonic vibration assisted extrusion forming apparatus as set forth in claims 1 to 9, including the steps of:

s1, mounting the vertical extrusion forming tool and the transverse extrusion forming tool on the lower end face of the ultrasonic amplitude transformer and the end face of the amplitude transformer respectively, and fixing the extrusion forming die with the workpiece to be formed on the upper surface of the lower pressure plate;

s2, inserting the transverse micro-extrusion forming tool into the insertion hole on the side surface of the extrusion forming die, and enabling the tail end of the transverse micro-extrusion forming tool to contact and press the left side surface of the workpiece to be formed; controlling the upper pressure plate to descend, enabling the vertical micro-extrusion forming tool to penetrate through the insertion hole in the top surface of the extrusion forming die, and enabling the tail end of the vertical micro-extrusion forming tool to contact and press the upper surface of the workpiece to be formed;

s3, turning on the ultrasonic vibration power supply, wherein the ultrasonic vibration power supply converts a low-frequency electric signal into an ultrasonic-frequency electric signal, the ultrasonic transducer converts the ultrasonic-frequency electric signal into an ultrasonic-frequency mechanical vibration wave to be output, and the ultrasonic amplitude transformer amplifies the horizontal ultrasonic amplitude output by the ultrasonic transducer; the ultrasonic amplitude transformer supports the vertical extrusion forming tool to realize ultrasonic resonance in the vertical direction, the amplitude transformer supports the transverse extrusion forming tool to realize transverse ultrasonic resonance, and the vertical extrusion forming tool continuously moves to a preset position to complete extrusion forming processing on the workpiece to be formed;

s4, after the workpiece to be formed is extruded and formed, removing the ultrasonic vibration system, lifting the upper pressure plate, separating the vertical extrusion forming tool from the formed workpiece, and turning off the ultrasonic vibration power supply to complete the multidirectional composite ultrasonic vibration auxiliary extrusion forming of the workpiece to be formed.

Technical Field

The invention relates to the technical field of extrusion forming equipment, in particular to multidirectional composite ultrasonic vibration auxiliary extrusion forming processing equipment and a forming method.

Background

The ultrasonic vibration assisted forming process is one of the leading research directions in the field of metal part plastic forming at present. In the ultrasonic vibration assisted plastic forming process, an ultrasonic system generates ultrasonic frequency mechanical vibration through an ultrasonic power supply, an ultrasonic transducer and an ultrasonic amplitude transformer, increases the amplitude of the vibration, and transmits the vibration to a plastic forming tool or a processed workpiece to generate high-frequency resonance, so that the ultrasonic vibration assisted plastic forming process is realized.

In the supplementary conventional extrusion forming process research of current ultrasonic vibration, ultrasonic transducer and the ultrasonic vibration system that ultrasonic horn constitutes generally set up along vertical extrusion direction, the end and the conventional extrusion instrument of ultrasonic horn are connected as a whole and are realized the high frequency vibration of vertical direction or horizontal direction, because the ultrasonic equipment of vertical placing needs great installation space, and the ultrasonic vibration of applying can only be applyed on extrusion instrument, and extrusion direction can only be in single vertical direction or horizontal direction, can not realize the compound ultrasonic extrusion of a plurality of directions simultaneously, not only be unfavorable for installing on current press, and the ultrasonic effect of applying also does not reach the best.

Disclosure of Invention

In view of this, the embodiment of the invention provides a multidirectional composite ultrasonic vibration assisted extrusion forming processing device and a forming method.

The embodiment of the invention provides a multidirectional composite ultrasonic vibration auxiliary extrusion forming processing device which comprises an upper pressure plate, a lower pressure plate, a double-transducer ultrasonic vibration platform and at least one ultrasonic vibration system, the upper pressure plate and the lower pressure plate are oppositely arranged, the double-transducer ultrasonic vibration platform is fixed on the upper pressure plate, the lower pressing plate is provided with an extrusion forming die, the ultrasonic vibration system is fixed around the extrusion forming die, the double-transducer ultrasonic vibration platform comprises an ultrasonic amplitude transformer, the lower end surface of the ultrasonic amplitude transformer is at least provided with a vertical extrusion tool, the ultrasonic vibration system comprises an amplitude transformer, a transverse extrusion tool is arranged at the tail end of the amplitude transformer, the double-transducer ultrasonic vibration platform is used for driving the vertical extrusion tool to generate ultrasonic vibration in the vertical direction, the ultrasonic vibration system is used for driving the transverse extrusion tool to generate ultrasonic vibration in the horizontal direction.

The dual-transducer ultrasonic vibration platform further comprises two ultrasonic transducers and two ultrasonic amplitude-change rods, the left end and the right end of each ultrasonic amplitude-change device are respectively connected with one end of each ultrasonic amplitude-change rod, the other end of each ultrasonic amplitude-change rod is respectively connected with one ultrasonic transducer, and the dual-transducer ultrasonic vibration platform is a linear structure which is bilaterally symmetrical with the ultrasonic amplitude-change devices as centers.

Furthermore, the ultrasonic horn is a porous ultrasonic horn, a plurality of blind holes are formed in the lower end face of the ultrasonic horn, and the vertical extrusion tool is fixed to the lower end face of the ultrasonic horn through the blind holes.

Furthermore, a forming cavity is arranged in the extrusion forming die, and the forming cavity is used for placing a workpiece to be formed.

The upper pressing plate and the lower pressing plate are located in the rack, a driving device is arranged above the rack, an output shaft of the driving device is connected with a lead screw, the lead screw is connected with the upper pressing plate, the driving device is used for driving the lead screw to rotate, and the lead screw drives the upper pressing plate to ascend or descend.

Furthermore, a fixing rod extending downwards is arranged at the upper end of the rack, and the ultrasonic vibration system is fixed around the extrusion forming die through the fixing rod.

Further, the vertical extrusion tool and the horizontal extrusion tool are stepped cylinders.

Furthermore, a plurality of insertion holes are formed in the side face and the top face of the extrusion forming die, the hole diameter of each insertion hole is the same as the outer diameter of the tail end of each vertical extrusion tool and the tail end of each transverse extrusion tool, and the insertion holes in the side face and the top face of the extrusion forming die are communicated with the forming cavity.

Furthermore, all the ultrasonic vibration systems and the double-transducer ultrasonic vibration platform are respectively connected with an ultrasonic vibration power supply and driven by the corresponding ultrasonic vibration power supply.

Further, the forming method of the multidirectional composite ultrasonic vibration auxiliary extrusion forming processing equipment comprises the following steps:

s1, mounting the vertical extrusion forming tool and the transverse extrusion forming tool on the lower end face of the ultrasonic amplitude transformer and the end face of the amplitude transformer respectively, and fixing the extrusion forming die with the workpiece to be formed on the upper surface of the lower pressure plate;

s2, inserting the transverse micro-extrusion forming tool into the insertion hole on the side surface of the extrusion forming die, and enabling the tail end of the transverse micro-extrusion forming tool to contact and press the left side surface of the workpiece to be formed; controlling the upper pressure plate to descend, enabling the vertical micro-extrusion forming tool to penetrate through the insertion hole in the top surface of the extrusion forming die, and enabling the tail end of the vertical micro-extrusion forming tool to contact and press the upper surface of the workpiece to be formed;

s3, turning on the ultrasonic vibration power supply, wherein the ultrasonic vibration power supply converts a low-frequency electric signal into an ultrasonic-frequency electric signal, the ultrasonic transducer converts the ultrasonic-frequency electric signal into an ultrasonic-frequency mechanical vibration wave to be output, and the ultrasonic amplitude transformer amplifies the horizontal ultrasonic amplitude output by the ultrasonic transducer; the ultrasonic amplitude transformer supports the vertical extrusion forming tool to realize ultrasonic resonance in the vertical direction, the amplitude transformer supports the transverse extrusion forming tool to realize transverse ultrasonic resonance, and the vertical extrusion forming tool continuously moves to a preset position to complete extrusion forming processing on the workpiece to be formed;

s4, after the workpiece to be formed is extruded and formed, removing the ultrasonic vibration system, lifting the upper pressure plate, separating the vertical extrusion forming tool from the formed workpiece, and turning off the ultrasonic vibration power supply to complete the multidirectional composite ultrasonic vibration auxiliary extrusion forming of the workpiece to be formed.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

1. the transverse ultrasonic vibration system uses a conventional ultrasonic system, is suitable for extrusion forming processing by adopting a larger-size die, and can apply transverse ultrasonic vibration systems with different angles and different quantities in a 360-degree range in the horizontal direction of the die according to actual processing requirements so as to reduce the modification cost and the process realization difficulty of sample processing pressure forming equipment.

2. The composite ultrasonic vibration assisted conventional extrusion forming processing equipment provided by the invention not only can simultaneously implement composite auxiliary ultrasonic vibration of transverse vibration of a formed workpiece, a conventional tool and a blank, but also can independently implement single auxiliary ultrasonic vibration of the formed workpiece or the conventional tool and the blank, and can also implement vibration of two combinations of the horizontal direction of the tool and the horizontal direction of the workpiece, thereby realizing the forming process of various ultrasonic auxiliary conventional processes.

3. The multidirectional composite ultrasonic auxiliary conventional extrusion forming method provided by the invention is beneficial to realizing and improving the transverse flow capacity of a metal material through the composite ultrasonic vibration of the tool and the workpiece, and solves the problem of poor metal fluidity in the horizontal direction.

4. The multidirectional composite ultrasonic vibration-assisted conventional extrusion forming processing equipment and the forming method thereof provided by the invention can also be widely applied to other ultrasonic vibration-assisted extrusion forming processes, particularly to the extrusion forming processes of parts related to longitudinal and transverse flow processes, such as T-shaped extruded parts and parts with flanges, and have a wide application prospect.

Drawings

FIG. 1 is a schematic structural diagram I of a multidirectional combined ultrasonic vibration assisted extrusion molding processing device of the present invention.

FIG. 2 is a schematic structural diagram II of a multidirectional combined ultrasonic vibration assisted extrusion molding processing device of the present invention.

FIG. 3 is a left schematic view of a multidirectional combined ultrasonic vibration assisted extrusion forming apparatus of the present invention.

Fig. 4 is a schematic structural view of the extrusion die 12 in fig. 1.

In the figure: the ultrasonic vibration forming device comprises a machine frame 1, an upper pressing plate 2, a lower pressing plate 3, a driving device 4, a lead screw 5, a fixing rod 6, a double-transducer ultrasonic vibration platform 7, an ultrasonic vibration system 8, an ultrasonic amplitude transformer 9, an amplitude transformer 10, a vertical extrusion tool 11, an extrusion forming die 12, a transverse extrusion tool 13, an ultrasonic transducer 14, an ultrasonic amplitude transformer 15, an ultrasonic vibration power supply 16, an insertion hole 17 and a forming cavity 18.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 and 2, an embodiment of the present invention provides a multidirectional combined ultrasonic vibration assisted extrusion forming apparatus, which includes a frame 1, an upper platen 2, a lower platen 3, a dual-transducer ultrasonic vibration platform 7 and at least one ultrasonic vibration system 8.

The upper pressing plate 2 and the lower pressing plate 3 are arranged oppositely, the upper pressing plate 2 and the lower pressing plate 3 are located in the rack 1, a driving device 4 is arranged above the rack 1, an output shaft of the driving device 4 is connected with a lead screw 5, the lead screw 5 is connected with the upper pressing plate 2, the driving device 4 is used for driving the lead screw 5 to rotate, the lead screw 5 drives the upper pressing plate 2 to ascend or descend, and the driving device 4 is a servo motor or other power equipment in the embodiment.

The double-transducer ultrasonic vibration platform 7 is fixed on the lower surface of the upper pressure plate 2, the upper surface of the lower pressure plate 3 is provided with an extrusion forming die 12, a forming cavity 18 is arranged in the extrusion forming die 12, and a workpiece to be formed is placed in the forming cavity 18.

The double-transducer ultrasonic vibration platform 7 comprises an ultrasonic amplitude transformer 9, two ultrasonic transducers 14 and two ultrasonic amplitude transformer rods 15, the left end and the right end of the ultrasonic amplitude transformer 9 are respectively connected with one end of each of the two ultrasonic amplitude transformer rods 15, the other end of each of the two ultrasonic amplitude transformer rods 15 is respectively connected with one ultrasonic transducer 14, the double-transducer ultrasonic vibration platform 7 is a linear structure which is bilaterally symmetrical with the ultrasonic amplitude transformer 9 as a center, and the central axes of the ultrasonic amplitude transformer 9, the two ultrasonic transducers 14 and the two ultrasonic amplitude transformer rods 15 are all on the same line.

The ultrasonic horn 9 is a porous ultrasonic horn, the lower end surface of the ultrasonic horn 9 is at least provided with one vertical extrusion tool 11, the lower end surface of the ultrasonic horn 9 is provided with a plurality of blind holes (not shown in the drawings), in the embodiment, the upper end surface of the ultrasonic horn 9 is also symmetrically provided with a plurality of blind holes for selection in the actual use process, the vertical extrusion tool 11 is fixed on the lower end surface of the ultrasonic horn 9 through the blind holes, and in the embodiment, the vertical extrusion tool 11 is fixed in the blind holes in a threaded connection manner.

Referring to fig. 1 and 3, the ultrasonic vibration system 8 is a conventional ultrasonic vibration system, the ultrasonic vibration system 8 includes an amplitude transformer 10, a transverse pressing tool 13 is disposed at a tail end of the amplitude transformer 10, and the vertical pressing tool 11 and the transverse pressing tool 13 are both cylinders.

The ultrasonic vibration system 8 is fixed around the extrusion forming die 12 through a fixing rod 6, specifically, the fixing rod 6 extending downwards is arranged at the upper end of the rack 1, and the fixing rod 6 is connected with the ultrasonic vibration system 8. In this embodiment the extrusion die 12 is because the lateral space is sufficient just ultrasonic vibration system 8 with the volume is less compared with double transducer ultrasonic vibration platform 7, can be according to the extrusion technology needs during the actual use set up different angles and different quantity in extrusion die 12 horizontal direction 360 within range ultrasonic vibration system 8, can with when necessary ultrasonic vibration system 8 stacks, can increase required in equidirectional and different positions ultrasonic vibration system 8 to realize the multidirectional compound ultrasonic vibration of horizontal direction.

All the ultrasonic vibration systems 8 and the dual-transducer ultrasonic vibration platform 7 are respectively connected with an ultrasonic vibration power supply 16 and driven by the ultrasonic vibration power supply 16 corresponding to the ultrasonic vibration systems, and in this embodiment, each ultrasonic vibration system 8 can share the same ultrasonic vibration power supply 16.

Referring to fig. 1 and 4, the side and top surfaces of the extrusion mold 12 are provided with a plurality of insertion holes 17, the diameter of each insertion hole 17 is the same as the outer diameter of the ends of the vertical extrusion tool 11 and the horizontal extrusion tool 13, and the insertion holes 17 on the side and top surfaces of the extrusion mold 12 are communicated with the molding cavity 18.

The double-transducer ultrasonic vibration platform 7 is used for driving the vertical extrusion tool 11 to generate ultrasonic vibration in the vertical direction, the ultrasonic vibration system 8 is used for driving the transverse extrusion tool 13 to generate ultrasonic vibration in the horizontal direction, and the ultrasonic vibration processing device can realize multiple ultrasonic auxiliary processing modes by respectively starting or closing the ultrasonic vibration power supply 16 connected with the double-transducer ultrasonic vibration platform 7 and each ultrasonic vibration system 8.

Referring to fig. 1-4, a forming method of a multidirectional composite ultrasonic vibration assisted extrusion forming processing apparatus includes the following steps:

s1, respectively installing the vertical extrusion forming tool and the transverse extrusion forming tool on the lower end face of the ultrasonic amplitude transformer 9 and the end face of the amplitude transformer 10, and fixing the extrusion forming die 12 with the workpiece to be formed on the upper surface of the lower pressure plate 3;

s2, inserting the transverse micro-extrusion forming tool into the insertion hole 17 on the side of the extrusion forming die 12, and making the tail end of the transverse micro-extrusion forming tool contact and press the left side surface of the workpiece to be formed; the screw rod 5 is driven to rotate by the driving device 4, so that the upper pressing plate 2 is controlled to descend, the vertical micro-extrusion forming tool passes through the insertion hole 17 in the top surface of the extrusion forming die 12, the tail end of the vertical micro-extrusion forming tool is made to contact and press the upper surface of the workpiece to be formed, certain pre-pressure is achieved, and the requirement for stabilizing ultrasonic vibration is met;

s3, turning on the ultrasonic vibration power supply 16, wherein the ultrasonic vibration power supply 16 converts a low-frequency electrical signal into an ultrasonic-frequency electrical signal, the ultrasonic transducer 14 converts the ultrasonic-frequency electrical signal into an ultrasonic-frequency mechanical vibration wave, and outputs the ultrasonic-frequency mechanical vibration wave, and the ultrasonic horn 15 amplifies the horizontal ultrasonic amplitude output by the ultrasonic transducer 14; the ultrasonic amplitude transformer 9 supports the vertical extrusion forming tool to realize ultrasonic resonance in the vertical direction, the amplitude transformer 10 supports the transverse extrusion forming tool to realize transverse ultrasonic resonance, and the vertical extrusion forming tool continuously moves to a preset position to complete extrusion forming processing on the workpiece to be formed;

s4, after the workpiece to be formed is extruded, removing the ultrasonic vibration system 8, lifting the upper pressure plate 2, separating the vertical extrusion forming tool from the formed workpiece, turning off the ultrasonic vibration power supply 16, and completing the multidirectional composite ultrasonic vibration assisted extrusion forming of the workpiece to be formed.

In the step S3, the ultrasonic vibration power supplies 16 may be respectively controlled to be turned on or off according to actual needs, so as to implement the following 4 operation modes:

1) simultaneously turning on all the ultrasonic vibration power supplies 16, simultaneously operating the vertical extrusion tool 11 and the transverse extrusion tool 13, and simultaneously subjecting the workpiece to be formed to vertical and transverse auxiliary ultrasonic vibration;

2) turning on each ultrasonic vibration power supply 16 connected with each ultrasonic vibration system 8, and turning off the ultrasonic vibration power supply 16 connected with the double-transducer ultrasonic vibration platform 7, wherein only the transverse extrusion tool 13 works at the moment, and the workpiece to be molded is subjected to transverse auxiliary ultrasonic vibration only;

3) turning on the ultrasonic vibration power supply 16 connected with the double-transducer ultrasonic vibration platform 7, and turning off the ultrasonic vibration power supply 16 connected with each ultrasonic vibration system 8, wherein only the vertical extrusion tool 11 works at the moment, and the workpiece to be molded is subjected to vertical auxiliary ultrasonic vibration only;

4) and simultaneously closing all the ultrasonic vibration power supplies 16, wherein the vertical extrusion tool 11, the extrusion forming die 12 and the transverse extrusion tool 13 do not work, and the traditional extrusion forming method is adopted.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.