Preparation process of winding frequency ultrasonic vibrator

Abstract

The invention discloses a preparation process of a winding frequency ultrasonic vibrator. The preparation process comprises the following steps: S1, preparing a transduction wafer; S11, pre-grinding; s12, pre-sintering is carried out; s13, regrinding is carried out; s14, performing granulation; s15, forming is conducted; s16, removing plastic; s17, sintering is carried out; s18, processing is carried out; s19, carrying out polarization; s2, preparing a metal end cover; S21, preparing an aluminum-silver alloy; s22, manufacturing a front end cover and a rear end cover by adopting the aluminum-silver alloy in the step S21; and S3, the front end cover, the first electrode plate, the first transduction wafer, the second motor plate, the second transduction wafer and the rear end cover are overlapped from bottom to top, and then a locking bolt is inserted from a connecting groove in the middle of the rear end cover to be screwed and fixed with the front end cover. In order to overcome the defects in the prior art, the invention provides the preparation process of the winding frequency ultrasonic vibrator, which is simple in process and can enable the ultrasonic vibrator to realize a multi-frequency amplitude function.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic vibrator manufacturing, and in particular to a preparation process of a frequency-wound ultrasonic vibrator. Background Art

[0002] Ultrasonic vibrator is the core component of ultrasonic transducer. It is a device that converts electrical energy into mechanical vibration energy. It is usually made of piezoelectric ceramic materials and uses the piezoelectric effect to achieve energy conversion. The performance parameters of ultrasonic vibrator include frequency, amplitude, power, etc. These parameters directly affect the working effect and application range of ultrasonic equipment.

[0003] Ultrasonic vibrators play an important role in industrial fields such as cleaning, welding, and processing. They are also widely used in medical fields such as ultrasonic diagnosis and treatment equipment.

[0004] Due to technical defects, existing ultrasonic vibrators can generally only vibrate within a narrow frequency range, which affects the use effect.

[0005] Therefore, the existing method for preparing the frequency-wound ultrasonic vibrator needs to be further improved. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a simple process for preparing a frequency-wound ultrasonic vibrator that can realize multi-frequency functions of the ultrasonic vibrator. In order to achieve the above object, the present invention adopts the following scheme: a preparation process of a frequency-wound ultrasonic vibrator, characterized in that it comprises the following steps: S1. Prepare transducer chip S11, pre-grinding: use a ball mill to mix and grind the raw materials to prepare for pre-sintering and complete solid phase reaction; S12, pre-sintering: sintering at 700-900° C. for 1-3 hours to conduct solid phase reaction of the raw materials to synthesize piezoelectric ceramic powder; S13, re-grinding: putting the pre-burned piezoelectric ceramic powder into the ball mill again, mixing and grinding it to ensure uniform performance of the ceramic; S14, granulation: forming the ceramic powder in S13 into high-density and fluidity particles by spray granulation, and adding a binder in the process; S15, forming: the particles prepared in step S14 are pressed into blanks according to the required prefabricated size; S16, plastic removal: removing the binder added during granulation from the blank; S17, sintering: sealing and sintering the blank at 1000-1200°C to form a hard ceramic body; S18, processing: grinding the fired ceramic body into the required finished product size; S19, Polarization: Set a conductive electrode on the surface of the wafer and use high voltage to align the electric domains inside the wafer. Forming piezoelectric properties; S2. Preparation of metal end caps S21, preparing aluminum-silver alloy: adding metallic silver to aviation aluminum, and adding metallic zinc, metallic magnesium, metallic copper and zirconium powder to prepare a composite aluminum-silver alloy; S22, using the aluminum-silver alloy in step S21 to make a front cover and a rear cover; S3. Assembly The front end cover, the first electrode sheet, the first transducer chip, the second motor sheet, the second transducer chip and the rear end cover are stacked from bottom to top, and then the locking bolt is inserted from the connecting groove in the middle of the rear end cover to be screwed and fixed to the front end cover.

[0007] As another improvement of the preparation process of the frequency-wound ultrasonic vibrator of the present invention, the raw materials in step S11 include barium titanate, lead zirconate titanate, lead titanate, and ferric oxide.

[0008] As another improvement of the preparation process of the frequency-wound ultrasonic vibrator of the present invention, the mass ratio of the barium titanate, lead zirconate titanate, lead titanate, and ferric oxide is 1:1.2-1.5:0.86-0.95:0.15-0.32.

[0009] As another improvement of the preparation process of the frequency-wound ultrasonic vibrator of the present invention, the rotation speed of the ball mill in step S11 is 200-450 r / min, and the ball milling time is 10-16 h.

[0010] As another improvement of the preparation process of the frequency-wound ultrasonic vibrator of the present invention, the adhesive in step S14 is a mixture of polyvinyl alcohol-88, alcohol and water in a ratio of 1:0.3-0.6:11-15.

[0011] As another improvement of the preparation process of the frequency-wound ultrasonic vibrator of the present invention, the steps are as follows: The mass ratio of aviation aluminum: metallic silver: metallic zinc: metallic magnesium: metallic copper: zirconium powder in S21 is 90-93:5-6:1-2:0.5-1.5:1-3:0.2-0.8.

[0012] In summary, the present invention has the following beneficial effects compared to the prior art: the energy conversion chip group distribution ratio in the present invention is appropriate, and after being processed by a suitable preparation process, it can finally perfectly achieve multiple carrier frequency vibration sub-frequencies (10F+) within the range of ±10% of the main frequency under the excitation of the multi-frequency voltage. In the present invention, aviation aluminum, metal silver, metal zinc, metal magnesium, metal copper and zirconium powder are used to smelt the silver-aluminum alloy, which effectively ensures the realization of the multi-frequency function of the vibrator. DETAILED DESCRIPTION

[0013] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with embodiments.

[0014] Example 1 A preparation process of a frequency-wound ultrasonic vibrator comprises the following steps: S1. Prepare transducer chip S11, pre-grinding: using a ball mill to mix and grind the raw materials to prepare for pre-sintering and complete solid phase reaction; wherein the mass ratio of barium titanate, lead zirconate titanate, lead titanate, and ferric oxide is 1:1.2:0.86:0.15. The speed of the ball mill is 200r / min, and the ball milling time is 16h.

[0015] S12, pre-sintering: sintering at 700° C. for 1 hour to conduct solid phase reaction of the raw materials to synthesize piezoelectric ceramic powder; S13, re-grinding: putting the pre-burned piezoelectric ceramic powder into the ball mill again, mixing and grinding it to ensure uniform performance of the ceramic; S14, granulation: The ceramic powder in S13 is formed into high-density and fluid particles by spray granulation, and a binder is added during the process; the binder is a mixture of polyvinyl alcohol-88, alcohol and water in a ratio of 1:0.3:11.

[0016] S15, forming: the particles prepared in step S14 are pressed into blanks according to the required prefabricated size; S16, plastic removal: removing the binder added during granulation from the blank; S17, sintering: sealing and sintering the blank at 1000°C to form a hard ceramic body; S18, processing: grinding the fired ceramic body into the required finished product size; S19, Polarization: Set a conductive electrode on the surface of the wafer, and use 15-30KV, 50-1000Hz high voltage electricity to align the electric domains inside the wafer. Forming piezoelectric properties; S2. Preparation of metal end caps S21. Preparation of aluminum-silver alloy: Add metallic silver to aviation aluminum, and add metallic zinc, metallic magnesium, metallic copper and zirconium powder to prepare a composite aluminum-silver alloy; wherein the mass ratio of aviation aluminum: metallic silver: metallic zinc: metallic magnesium: metallic copper: zirconium powder is 90:6:1:0.5:1:0.2.

[0017] S22, using the aluminum-silver alloy in step S21 to make a front cover and a rear cover; S3. Assembly The front end cover, the first electrode sheet, the first transducer chip, the second motor sheet, the second transducer chip and the rear end cover are stacked from bottom to top, and then the locking bolt is inserted from the connecting groove in the middle of the rear end cover to be screwed and fixed to the front end cover.

[0018] Example 2 A preparation process of a frequency-wound ultrasonic vibrator comprises the following steps: S1. Prepare transducer chip S11, pre-grinding: Use a ball mill to mix and grind the raw materials to prepare for pre-sintering and complete solid phase reaction; wherein the mass ratio of barium titanate, lead zirconate titanate, lead titanate, and ferric oxide is 1:1.5:0.95:0.32. The speed of the ball mill is 450r / min, and the ball milling time is 10h.

[0019] S12, pre-sintering: sintering at 900° C. for 3 h to conduct solid phase reaction of the raw materials to synthesize piezoelectric ceramic powder; S13, re-grinding: putting the pre-burned piezoelectric ceramic powder into the ball mill again, mixing and grinding it to ensure uniform performance of the ceramic; S14, granulation: The ceramic powder in S13 is formed into high-density and fluidity particles by spray granulation, and a binder is added during the process; the binder is a mixture of polyvinyl alcohol-88, alcohol and water in a ratio of 1:0.6:15.

[0020] S15, forming: the particles prepared in step S14 are pressed into blanks according to the required prefabricated size; S16, plastic removal: removing the binder added during granulation from the blank; S17, sintering: sealing and sintering the blank at 1200°C to form a hard ceramic body; S18, processing: grinding the fired ceramic body into the required finished product size; S19, Polarization: Set a conductive electrode on the surface of the wafer, and use a high voltage of 15-30KV and a frequency of 50-1000Hz to align the electric domains inside the wafer. Forming piezoelectric properties; S2. Preparation of metal end caps S21. Preparation of aluminum-silver alloy: Add metallic silver to aviation aluminum, and add metallic zinc, metallic magnesium, metallic copper and zirconium powder to prepare a composite aluminum-silver alloy; wherein the mass ratio of aviation aluminum: metallic silver: metallic zinc: metallic magnesium: metallic copper: zirconium powder is 93:6:2:1.5:3:0.8.

[0021] S22, using the aluminum-silver alloy in step S21 to make a front cover and a rear cover; S3. Assembly The front end cover, the first electrode sheet, the first transducer chip, the second motor sheet, the second transducer chip and the rear end cover are stacked from bottom to top, and then the locking bolt is inserted from the connecting groove in the middle of the rear end cover to be screwed and fixed to the front end cover.

[0022] Example 3 A preparation process of a frequency-wound ultrasonic vibrator comprises the following steps: S1. Prepare transducer chip S11, pre-grinding: using a ball mill to mix and grind the raw materials to prepare for pre-sintering and complete solid phase reaction; wherein the mass ratio of barium titanate, lead zirconate titanate, lead titanate, and ferric oxide is 1:1.3:0.92:0.24. The speed of the ball mill is 300r / min, and the ball milling time is 12h.

[0023] S12, pre-sintering: sintering at 800° C. for 2 h to conduct solid phase reaction of the raw materials to synthesize piezoelectric ceramic powder; S13, re-grinding: putting the pre-burned piezoelectric ceramic powder into the ball mill again, mixing and grinding it to ensure uniform performance of the ceramic; S14, granulation: The ceramic powder in S13 is formed into high-density and fluid particles by spray granulation, and a binder is added during the process; the binder is a mixture of polyvinyl alcohol-88, alcohol and water in a ratio of 1:0.4:13.

[0024] S15, forming: the particles prepared in step S14 are pressed into blanks according to the required prefabricated size; S16, plastic removal: removing the binder added during granulation from the blank; S17, sintering: sealing and sintering the blank at 1150°C to form a hard ceramic body; S18, processing: grinding the fired ceramic body into the required finished product size; S19, Polarization: Set a conductive electrode on the surface of the wafer, and use a high voltage of 15-30KV and a frequency of 50-1000Hz to align the electric domains inside the wafer. Forming piezoelectric properties; S2. Preparation of metal end caps S21. Preparation of aluminum-silver alloy: Add metallic silver to aviation aluminum, and add metallic zinc, metallic magnesium, metallic copper and zirconium powder to prepare a composite aluminum-silver alloy; wherein the mass ratio of aviation aluminum: metallic silver: metallic zinc: metallic magnesium: metallic copper: zirconium powder is 92:5.5:1.5:1:2:0.25.

[0025] S22, using the aluminum-silver alloy in step S21 to make a front cover and a rear cover; S3. Assembly The front end cover, the first electrode sheet, the first transducer chip, the second motor sheet, the second transducer chip and the rear end cover are stacked from bottom to top, and then the locking bolt is inserted from the connecting groove in the middle of the rear end cover to be screwed and fixed to the front end cover.

[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A process for preparing a frequency-wound ultrasonic vibrator, characterized in that The following steps are involved: S1. Prepare transducer chip S11, pre-grinding: use a ball mill to mix and grind the raw materials to prepare for pre-sintering and complete solid phase reaction; S12, pre-sintering: sintering at 700-900° C. for 1-3 hours to conduct solid phase reaction of the raw materials to synthesize piezoelectric ceramic powder; S13, re-grinding: putting the pre-burned piezoelectric ceramic powder into the ball mill again, mixing and grinding it to ensure uniform performance of the ceramic; S14, granulation: forming the ceramic powder in S13 into high-density and fluidity particles by spray granulation, and adding a binder in the process; S15, forming: the particles prepared in step S14 are pressed into blanks according to the required prefabricated size; S16, plastic removal: removing the binder added during granulation from the blank; S17, sintering: sealing and sintering the blank at 1000-1200°C to form a hard ceramic body; S18, processing: grinding the fired ceramic body into the required finished product size; S19, Polarization: Set a conductive electrode on the surface of the wafer and use high voltage to align the electric domains inside the wafer. Forming piezoelectric properties; S2. Preparation of metal end caps S21, preparing aluminum-silver alloy: adding metallic silver to aviation aluminum, and adding metallic zinc, metallic magnesium, metallic copper and zirconium powder to prepare a composite aluminum-silver alloy; S22, using the aluminum-silver alloy in step S21 to make a front cover and a rear cover; S3. Assembly The front end cover, the first electrode sheet, the first transducer chip, the second motor sheet, the second transducer chip and the rear end cover are stacked from bottom to top, and then the locking bolt is inserted from the connecting groove in the middle of the rear end cover to be screwed and fixed to the front end cover.

2. The process for preparing a frequency-wound ultrasonic vibrator according to claim 1, characterized in that: The raw materials in step S11 include barium titanate, lead zirconate titanate, lead titanate, and ferric oxide.

3. The process for preparing a frequency-wound ultrasonic vibrator according to claim 2, characterized in that: The mass ratio of the barium titanate, lead zirconate titanate, lead titanate and ferric oxide is 1:1.2-1.5:0.86-0.95:0.15-0.

32.

4. The process for preparing a frequency-wound ultrasonic vibrator according to claim 3, characterized in that: In step S11, the rotation speed of the ball mill is 200-450 r / min, and the ball milling time is 10-16 h.

5. The process for preparing a frequency-wound ultrasonic vibrator according to claim 1, characterized in that: The adhesive in step S14 is a mixture of polyvinyl alcohol-88, alcohol and water in a ratio of 1:0.3-0.6:11-15.

6. The process for preparing a frequency-wound ultrasonic vibrator according to claim 1, characterized in that: step The mass ratio of aviation aluminum: metallic silver: metallic zinc: metallic magnesium: metallic copper: zirconium powder in S21 is 90-93:5-6:1-2:0.5-1.5:1-3:0.2-0.8.