High-power piezoelectric welding transducer
By adopting a sandwich longitudinal-torque structure and insulating sleeve design in high-power piezoelectric welding transducer, the energy interference between the twisting and longitudinal piezoelectric ceramic sheets and the lack of flexibility in the welding joint is solved, and high efficiency is achieved energy conversion and welding quality improvement.
Patent Information
- Application Number
- CN202422567639.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-10-24
AI Technical Summary
Traditional transverse welding transducers have large amplitude, resulting in cracking of thin and brittle materials. The composite piezoelectric vibration system has interference with the setting and coupling between the torsional direction and longitudinal piezoelectric ceramic sheet, and there is a risk of electric spark or short circuit. The welding joint is not flexible enough and cannot be based on the The workpiece characteristics adjust the energy output, affecting welding efficiency and quality.
A high-power piezoelectric welding transducer is designed, adopting a sandwich longitudinal-torque structure, setting the twisting and longitudinal piezoelectric ceramic sheets through intervals and achieving energy coupling through connecting rods, and isolating with an insulating sleeve, and the welding head is directly In contact with the workpiece and transfer energy through the buoy, the external excitation power supply is controlled to achieve a single or compound energy output.
It improves welding efficiency and energy conversion efficiency, ensures equipment safety and welding flexibility, can adjust energy output according to workpiece characteristics, and improves welding quality.
Smart Images
Figure CN222154392U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of welding devices, in particular to a high-power piezoelectric welding transducer. Background Art
[0002] With the increasing application of hard and brittle composite materials, their processing difficulty continues to increase, and the requirements for processing efficiency and surface quality are also increasing. As the core of welding technology, the performance of high-power welding transducers is crucial. However, the traditional transverse welding transducer has a large amplitude, which can easily cause thin and brittle materials to crack, and it is difficult to meet current processing needs. The composite piezoelectric vibration system has therefore become a research focus, and its processing efficiency and surface quality are better than a single vibration mode. However, it still faces technical challenges: first, the setting and coupling of torsional and longitudinal piezoelectric ceramic sheets interfere with energy output, reduce welding efficiency and energy conversion efficiency, and even damage equipment; second, the isolation measures between the piezoelectric ceramic sheet and the connecting rod are not perfect, and there is a risk of electric sparks or short circuits; third, the welding head is not flexible enough, and the energy output cannot be adjusted according to the characteristics of the workpiece, affecting the welding effect. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a high-power piezoelectric welding transducer.
[0004] The technical solution adopted by the utility model is as follows:
[0005] A high-power piezoelectric welding transducer comprises a transducer device and an excitation device, wherein the transducer device comprises a sandwich-type longitudinal-torsion structure, and a front end cover and a rear end cover arranged on both sides of the sandwich-type longitudinal-torsion structure; the sandwich-type longitudinal-torsion structure comprises a torsional piezoelectric ceramic sheet and a longitudinal piezoelectric ceramic sheet arranged at intervals on a connecting rod, and the connecting rod passes through the rear end cover and is fixed by a pre-tightening nut; a variable amplitude rod is arranged at the energy excitation point of the sandwich-type longitudinal-torsion structure, one end of the variable amplitude rod is connected to the front end cover, and the other end of the variable amplitude rod is connected to a welding head, and the variable amplitude rod outputs high-power thermal energy to energy through the welding head.
[0006] This technical solution ensures that the torsional piezoelectric ceramic sheet and the longitudinal piezoelectric ceramic sheet are spaced apart on the connecting rod to ensure that the energies of the two do not interfere with each other, while at the same time being coupled through the connecting rod; the welding head directly contacts the workpiece and converts the energy transmitted by the amplitude transformer into the heat energy required for welding. Specifically, the excitation device provides high-frequency alternating current to excite the sandwich-type longitudinal-torsional structure to work, and the energy of the sandwich-type longitudinal-torsional structure is transmitted to the amplitude transformer through the connecting rod, and the longitudinal-torsional composite energy is amplified and transmitted to the welding head through the amplitude transformer. The welding head converts the excitation energy into the heat energy required for welding to achieve the welding of the workpiece.
[0007] In addition, the high-power piezoelectric welding transducer proposed in the utility model also has the following additional technical features:
[0008] According to an embodiment of the utility model, two grooves are arranged on the connecting rod, and the two grooves are respectively connected to the corresponding torsional piezoelectric ceramic sheet and longitudinal piezoelectric ceramic sheet through insulating sleeves.
[0009] The technical solution provides two grooves on the connecting rod, and connects the torsional piezoelectric ceramic sheet and the longitudinal piezoelectric ceramic sheet to the corresponding grooves through an insulating sleeve, so as to achieve stable connection and isolation between the piezoelectric ceramic sheet and the connecting rod.
[0010] According to an embodiment of the utility model, the torsional piezoelectric ceramic sheet and the longitudinal piezoelectric ceramic sheet are both made of PZT-8, and are excited by two-phase sinusoidal voltages of the same frequency but different phases, with a phase difference of 90° between the two-phase sinusoidal voltage excitations.
[0011] This technical solution uses PZT-8 material to make torsional piezoelectric ceramic sheets and longitudinal piezoelectric ceramic sheets, and uses two-phase sinusoidal voltage excitation with the same frequency but different phases (phase difference is 90°) to generate longitudinal-torsional composite energy.
[0012] According to an embodiment of the utility model, the torsional piezoelectric ceramic sheet and the longitudinal piezoelectric ceramic sheet are independently connected to external excitation power supplies. If any external excitation power supply is in an open circuit state, the welding head outputs a single energy; if the external excitation power supply is closed synchronously, the welding head outputs a composite energy.
[0013] The technical solution realizes the welding head outputting single energy or composite energy by independently connecting the torsional piezoelectric ceramic sheet and the longitudinal piezoelectric ceramic sheet to an external excitation power supply and controlling the switching state of the external excitation power supply.
[0014] According to an embodiment of the utility model, the amplitude transformer is a columnar structure, and its diameter gradually decreases from the front end cover toward the welding head.
[0015] This technical solution achieves amplification and focusing of the excitation energy through a horn with a gradually decreasing diameter.
[0016] According to an embodiment of the utility model, the welding head is threadedly fixed to the end of the amplitude transformer and contacts the workpiece.
[0017] The technical solution achieves the welding process by threading the welding head to the end of the amplitude transformer and contacting the workpiece to ensure that the welding head can stably transfer energy to the workpiece.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] (1) By setting the interval and coupling the torsional piezoelectric ceramic sheet and the longitudinal piezoelectric ceramic sheet, it is ensured that the energy of the two does not interfere with each other, achieving high-power piezoelectric output and improving welding efficiency.
[0020] (2) By providing grooves and insulating sleeves, the piezoelectric ceramic sheet and the connecting rod are isolated to ensure the safety of the welding process.
[0021] (3) The welding head directly converts the energy transmitted by the amplitude transformer into the heat energy required for welding. At the same time, by controlling the switching state of the external excitation power supply, single energy or compound energy can be achieved, thereby improving the flexibility of welding. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural schematic diagram of the utility model.
[0023] Figure 2 It is an internal sectional view of the present utility model.
[0024] Figure 3 It is one of the state diagrams of the sandwich longitudinal-torsional structure.
[0025] Figure 4 This is the second state diagram of the sandwich longitudinal-torsional structure.
[0026] Figure 5 It is a structural schematic diagram of a sandwich longitudinal-torsion structure.
[0027] In the figure: 1. connecting rod; 2. pre-tightening nut; 3. rear end cover; 4. electrode sheet; 5. front end cover; 6. amplitude transformer; 7. welding head; 8. insulating sleeve; 9. torsional piezoelectric ceramic sheet; 10. longitudinal piezoelectric ceramic sheet. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] Example 1
[0030] like Figures 1 to 5As shown, this embodiment provides a high-power piezoelectric welding transducer, including a transducer device and an excitation device, wherein the transducer device includes a sandwich-type longitudinal-torsion structure, and a front end cover 5 and a rear end cover 3 arranged on both sides of the sandwich-type longitudinal-torsion structure; the sandwich-type longitudinal-torsion structure includes a torsional piezoelectric ceramic sheet 9 and a longitudinal piezoelectric ceramic sheet 10 arranged at intervals on a connecting rod 1, and the connecting rod 1 passes through the rear end cover 3 and is fixed by a pre-tightening nut 2; a variable amplitude rod 6 is arranged at the energy excitation point of the sandwich-type longitudinal-torsion structure, one end of the variable amplitude rod 6 is connected to the front end cover 5, and the other end of the variable amplitude rod 6 is connected to the welding head 7, and the variable amplitude rod 6 outputs high-power thermal energy through the welding head 7.
[0031] like Figures 1 to 5 As shown, the technical solution is to set the torsional piezoelectric ceramic sheet 9 and the longitudinal piezoelectric ceramic sheet 10 on the connecting rod 1 at intervals to ensure that the energy of the two does not interfere with each other, and at the same time can achieve coupling through the connecting rod 1; the welding head 7 directly contacts the workpiece and converts the energy transmitted by the amplitude transformer 6 into the heat energy required for welding. Specifically, the excitation device provides high-frequency alternating current to excite the sandwich-type longitudinal-torsion structure to work, and the energy of the sandwich-type longitudinal-torsion structure is transmitted to the amplitude transformer 6 through the connecting rod 1, and the longitudinal-torsion composite energy is amplified and transmitted to the welding head 7 via the amplitude transformer 6. The welding head 7 converts the excitation energy into the heat energy required for welding to achieve the welding of the workpiece.
[0032] In addition, the high-power piezoelectric welding transducer proposed in the utility model also has the following additional technical features:
[0033] According to an embodiment of the utility model, two grooves are arranged on the connecting rod 1 , and the two grooves are respectively connected to the corresponding torsional piezoelectric ceramic sheet 9 and longitudinal piezoelectric ceramic sheet 10 through the insulating sleeve 8 .
[0034] The technical solution provides two grooves on the connecting rod 1 and connects the torsional piezoelectric ceramic sheet 9 and the longitudinal piezoelectric ceramic sheet 10 to the corresponding grooves through the insulating sleeve 8 to achieve stable connection and isolation between the piezoelectric ceramic sheet and the connecting rod 1 .
[0035] According to an embodiment of the utility model, the material of the torsional piezoelectric ceramic sheet 9 and the longitudinal piezoelectric ceramic sheet 10 are both PZT-8, and two-phase sinusoidal voltage excitation with the same frequency but different phases is adopted, and there is a 90° phase difference between the two-phase sinusoidal voltage excitation. Its working principle is: in order to generate torsion, the polarization directions of adjacent piezoelectric ceramic rings are opposite, and their polarization directions and wiring methods are as follows Figure 3 As shown; as a small sector element of the piezoelectric ceramic ring Figure 4 , whose polarization direction is Figure 3 The directions shown are the same and along the circumference, and the arrows indicate the polarization directions.
[0036] The technical solution adopts PZT-8 material to make the torsional piezoelectric ceramic sheet 9 and the longitudinal piezoelectric ceramic sheet 10, and uses two-phase sinusoidal voltage excitation with the same frequency but different phases (phase difference is 90°) to generate longitudinal-torsional composite energy.
[0037] According to an embodiment of the utility model, the torsional piezoelectric ceramic sheet 9 and the longitudinal piezoelectric ceramic sheet 10 are independently connected to external excitation power supplies. When any external excitation power supply is in an open circuit state, the welding head 7 outputs a single energy; when the external excitation power supply is closed synchronously, the welding head 7 outputs a composite energy.
[0038] The technical solution independently connects the torsional piezoelectric ceramic sheet 9 and the longitudinal piezoelectric ceramic sheet 10 to an external excitation power source through the electrode sheet 4, and controls the switching state of the external excitation power source to achieve the welding head 7 outputting a single energy or a composite energy.
[0039] According to an embodiment of the present invention, the amplitude transformer 6 is a columnar structure, and its diameter gradually decreases from the front end cover 5 to the welding head 7 .
[0040] The technical solution realizes the amplification and focusing of the excitation energy by using the horn 6 with a gradually decreasing diameter.
[0041] According to an embodiment of the present invention, the welding head 7 is threadedly fixed to the end of the horn 6 and contacts the workpiece.
[0042] The technical solution implements the welding process by threading the welding head 7 to the end of the horn 6 and contacting the workpiece to ensure that the welding head 7 can stably transfer energy to the workpiece.
[0043] The usage process of the above embodiment is as follows:
[0044] like Figures 1 to 5 As shown, the excitation device provides high-frequency alternating current to excite the sandwich longitudinal-torsional structure to work; the torsional piezoelectric ceramic sheet 9 and the longitudinal piezoelectric ceramic sheet 10 are arranged at intervals on the connecting rod 1, and generate torsional and longitudinal excitation energy after being excited respectively, which do not interfere with each other but can be coupled through the connecting rod 1; the energy is amplified by the amplitude transformer 6 at the energy excitation point and transmitted to the welding head 7; the amplitude transformer 6 is a columnar structure with a gradually decreasing diameter, which is helpful for amplifying and focusing the excitation energy; the welding head 7 is in direct contact with the workpiece, and converts the received longitudinal-torsional composite energy into the heat energy required for welding, thereby realizing the welding of the workpiece.
[0045] Although the utility model is described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the utility model is not limited thereto. Without departing from the spirit and essence of the utility model, ordinary technicians in the field may make various equivalent modifications or substitutions to the embodiments of the utility model, and these modifications or substitutions should be within the scope of the utility model / any technician familiar with the technical field within the technical scope disclosed by the utility model, easily think of changes or substitutions, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.
Claims
1. A high-power piezoelectric welding transducer, comprising a transducer device and an excitation device, characterized in that: The energy conversion device comprises a sandwich-type longitudinal-torsion structure, and a front end cover (5) and a rear end cover (3) arranged on both sides of the sandwich-type longitudinal-torsion structure; the sandwich-type longitudinal-torsion structure comprises a torsional piezoelectric ceramic sheet (9) and a longitudinal piezoelectric ceramic sheet (10) arranged at intervals on a connecting rod (1), the connecting rod (1) passes through the rear end cover (3) and is fixed by a pre-tightening nut (2); a variable amplitude rod (6) is arranged at the energy excitation point of the sandwich-type longitudinal-torsion structure, one end of the variable amplitude rod (6) is connected to the front end cover (5), and the other end of the variable amplitude rod (6) is connected to a welding head (7), and the variable amplitude rod (6) outputs high-power thermal energy through the welding head (7).
2. The high-power piezoelectric welding transducer according to claim 1, characterized in that: The connecting rod (1) is provided with two grooves, and the two grooves are respectively connected to the corresponding torsional piezoelectric ceramic sheet (9) and longitudinal piezoelectric ceramic sheet (10) through insulating sleeves (8).
3. The high-power piezoelectric welding transducer according to claim 1, characterized in that: The torsional piezoelectric ceramic sheet (9) and the longitudinal piezoelectric ceramic sheet (10) are both made of PZT-8 and are excited by two-phase sinusoidal voltages with the same frequency but different phases, with a phase difference of 90° between the two-phase sinusoidal voltage excitations.
4. The high-power piezoelectric welding transducer according to claim 1, characterized in that: The torsional piezoelectric ceramic sheet (9) and the longitudinal piezoelectric ceramic sheet (10) are respectively and independently connected to external excitation power supplies. When any external excitation power supply is in an open circuit state, the welding head (7) outputs a single energy; when the external excitation power supply is synchronously closed, the welding head (7) outputs a composite energy.
5. The high-power piezoelectric welding transducer according to claim 1, characterized in that: The amplitude transformer (6) is a columnar structure, and its diameter gradually decreases from the front end cover (5) toward the welding head (7).
6. The high-power piezoelectric welding transducer according to claim 1, characterized in that: The welding head (7) is threadedly fixed to the end of the amplitude transformer (6) and is in contact with the workpiece.