Ultrasonic transducer and circuit board ultrasonic cleaning machine

Abstract

The utility model provides an ultrasonic transducer and circuit board ultrasonic cleaning machine, an ultrasonic transducer includes transducer box body, is provided with a plurality of transducer units on transducer box body, and transducer unit includes the transducer front cover plate, piezoelectric ceramic piece, transducer back cover plate and pre -stress screw rod who sets gradually from top to bottom, and the transducer front cover plate includes connecting seat and ultrasonic sound emitting surface, and the thickness of ultrasonic sound emitting surface is less than the thickness of connecting seat, and ultrasonic sound emitting surface can be inserted into the gap between a plurality of transport rolling pole. Advantageous effect is: through the optimization design to ultrasonic sound emitting surface shape, inserts ultrasonic sound emitting surface into the gap between a plurality of transport rolling pole, can effectively reduce the loss of ultrasonic energy, and ultrasonic sound emitting surface narrows thickness, can effectively make the released ultrasonic energy more uniform and gather, greatly improve cleaning efficiency, solve the problem that the existing ultrasonic transducer washes effect is not good, make it satisfy the demand of circuit board one -time cleaning clean, save the cost, improve the efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic cleaning machine technology, specifically to an ultrasonic cleaner for ultrasonic transducers and circuit boards. Background Technology

[0002] Cleaning is one of the most important processes in the production of circuit boards. Because electronic components on circuit boards (such as capacitors and resistors) are sensitive to physical damage, the emergence of industrial ultrasonic cleaning machines has rapidly replaced traditional brushing or chemical cleaning and has become a key cleaning equipment.

[0003] Ultrasonic waves generate cavitation in the cleaning fluid through high-frequency vibrations (typically above 20kHz), forming tiny bubbles that burst instantaneously. This creates an impact force that penetrates deep into the micron-level crevices of circuit boards, removing contaminants such as solder slag, oil, and dust that are difficult to reach with traditional methods. It is suitable for cleaning high-density interconnect (HDI) circuit boards and blind via structures.

[0004] Existing industrial ultrasonic cleaning machines typically include a transport rolling mechanism and an ultrasonic transducer. In order to accommodate the cleaning and transport of circuit boards of different sizes, the transport rolling mechanism requires a compact layout between the multiple transport rolling rods.

[0005] The existing ultrasonic transducer front cover is shaped like a frustum with a large diameter. The ultrasonic transducer can only be placed below the transmission rolling mechanism. This results in a relatively large distance between the ultrasonic waves of the transducer and the circuit board surface to be cleaned. At the same time, the transmission rolling mechanism will block the transmission of ultrasonic energy and absorb some of the ultrasonic energy, so a higher power ultrasonic transducer needs to be used in the design.

[0006] Furthermore, because the front cover of the ultrasonic transducer is shaped like a frustum, the released ultrasonic energy is circularly dispersed, resulting in unevenness on the ultrasonic cleaning surface and low energy utilization. This leads to poor cleaning effect on the circuit board, which may require multiple cleaning cycles, resulting in low cleaning efficiency and wasting cleaning fluid, labor time, and electricity costs, thus failing to meet the needs of high-efficiency production. Utility Model Content

[0007] To address the problems in the prior art, this utility model provides an ultrasonic transducer and an ultrasonic cleaning machine for circuit boards, which solves the problem of low cleaning efficiency caused by the shape design of the ultrasonic transducer in the prior art ultrasonic cleaning machine.

[0008] This utility model discloses an ultrasonic transducer, including a transducer housing with multiple transducer units arranged on it. Each transducer unit includes a front cover plate, a piezoelectric ceramic sheet, a rear cover plate, and a prestressed screw arranged sequentially from top to bottom. The front cover plate includes a connecting seat and an ultrasonic sound-emitting surface. The thickness of the ultrasonic sound-emitting surface is less than the thickness of the connecting seat, and the ultrasonic sound-emitting surface can be inserted into the gap between multiple transport rollers.

[0009] This invention is further improved by making the ultrasonic emitting surface flat. The shape of the ultrasonic emitting surface can make the ultrasonic energy more uniform and concentrated, thereby improving the cleaning efficiency.

[0010] This utility model is further improved by providing a guide and clearance slope between the connecting seat and the ultrasonic sound-generating surface.

[0011] Further improvements to this invention include a waterproof silicone gasket. The vibrator housing has a fixing hole that mates with the piezoelectric ceramic sheet. The waterproof silicone gasket is fitted onto the lower end of the front cover plate of the vibrator, and the connecting seat is located in the fixing hole. The waterproof silicone gasket can improve the sealing between the front cover plate of the vibrator and the fixing hole.

[0012] This utility model is further improved by arranging multiple oscillator units at equal intervals.

[0013] This utility model also provides an ultrasonic cleaning machine for circuit boards, including a cleaning machine body, a transmission rolling mechanism and an ultrasonic transducer. The transmission rolling mechanism includes a rolling drive device and multiple transport rolling rods. A cleaning tank is provided on the cleaning machine body and a support frame is provided at both ends of the cleaning tank. Multiple transport rolling rods are equally spaced on the support frame and a spiral transport plate is provided on the transport rolling rod. The ultrasonic transducer is provided in the cleaning tank and the ultrasonic sound-emitting surface is provided in the gap of the transport rolling rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides an ultrasonic transducer, whose structure can effectively solve the problem of low cleaning efficiency caused by the shape design of ultrasonic transducers in existing ultrasonic cleaning machines. By optimizing the shape of the ultrasonic sound-emitting surface and inserting it into the gap between multiple transport rollers, the loss of ultrasonic energy can be effectively reduced. At the same time, the reduced thickness of the ultrasonic sound-emitting surface can effectively make the released ultrasonic energy more uniform and concentrated, greatly improving the cleaning efficiency. This solves the problem of poor cleaning effect of existing ultrasonic transducers, enabling it to meet the requirement of cleaning circuit boards in one go, saving costs and improving efficiency. Attached Figure Description

[0015] To more clearly illustrate the solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of an ultrasonic cleaning machine for circuit boards.

[0017] Figure 2 This is a schematic diagram of an ultrasonic transducer structure.

[0018] Figure 3 This is a schematic diagram of the exploded structure of an ultrasonic transducer. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish different objects, not to describe a particular order.

[0020] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment to other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] like Figures 1-3As shown, this utility model discloses an ultrasonic cleaning machine for circuit boards, including a cleaning machine body 1, a transmission rolling mechanism, and an ultrasonic transducer 3. The transmission rolling mechanism includes a rolling drive device 2 and multiple transport rolling rods 4. A cleaning tank is provided on the cleaning machine body 1, and support frames 12 are provided at both ends of the cleaning tank. Multiple transport rolling rods 4 are equally spaced on the support frames 12, and spiral transport plates are provided on the transport rolling rods 4. The ultrasonic transducer 3 is provided in the cleaning tank, and the ultrasonic sound-emitting surface 3212 is provided in the gap of the transport rolling rods 4.

[0023] The ultrasonic transducer 3 includes a transducer housing 31, on which multiple transducer units 32 are arranged. Each transducer unit 32 includes a front cover plate 321, a piezoelectric ceramic sheet 322, a rear cover plate 323, and a prestressed screw 324 arranged sequentially from top to bottom. The front cover plate 321 includes a connecting seat 3211 and an ultrasonic sound-emitting surface 3212. The thickness of the ultrasonic sound-emitting surface 3212 is less than the thickness of the connecting seat 3211, and the ultrasonic sound-emitting surface 3212 can be inserted into the gap between multiple transport rollers 4.

[0024] By optimizing the shape of the ultrasonic emitting surface 3212 and inserting it into the gaps between multiple transport rollers 4, the loss of ultrasonic energy can be effectively reduced. At the same time, the reduced thickness of the ultrasonic emitting surface 3212 can effectively make the released ultrasonic energy more uniform and concentrated, greatly improving the cleaning efficiency. This solves the problem of poor cleaning effect of the existing ultrasonic transducer 3, enabling it to meet the requirement of cleaning the circuit board 5 in one go, saving costs and improving efficiency.

[0025] The cleaning tank is filled with cleaning agent. The rolling drive device 2 drives the transport roller 4 to transport the circuit board 5. At the same time, the ultrasonic transducer 3 cleans the circuit board 5.

[0026] The ultrasonic emitting surface 3212 is flat in shape. This flat design effectively concentrates ultrasonic energy and makes the ultrasonic energy more uniform, thus improving the cleaning effect.

[0027] A guide clearance ramp 3213 is provided between the connecting seat 3211 and the ultrasonic sound-generating surface 3212. By providing the guide clearance ramp 3213, the ultrasonic transducer 3 can be prevented from affecting the operation of the transport roller 4, while allowing more of the ultrasonic sound-generating surface 3212 to be inserted.

[0028] The width of the end of the ultrasonic sound-emitting surface 3212 away from the connector 3211 is greater than the width of the end of the ultrasonic sound-emitting surface 3212 close to the connector 3211. A sound-emitting channel is provided in the front cover plate 321 of the vibrator, and the width of the sound-emitting channel in the ultrasonic sound-emitting surface 3212 gradually expands to both sides.

[0029] The ultrasonic transducer 3 also includes a waterproof silicone gasket 33. The transducer housing 31 is provided with a fixing hole 311 that mates with the piezoelectric ceramic sheet 322. The waterproof silicone gasket 33 is fitted onto the lower end of the transducer front cover plate 321, and the connecting seat 3211 is provided in the fixing hole 311.

[0030] The waterproof silicone gasket 33 improves the sealing between the front cover plate 321 of the vibrator and the fixing hole 311.

[0031] Multiple oscillator units 32 are arranged at equal intervals, which allows for uniform cleaning of the circuit board 5.

[0032] As can be seen from the above, the beneficial effects of this utility model are: it can effectively solve the problem of low cleaning efficiency caused by the shape design of the ultrasonic transducer 3 in the existing ultrasonic cleaning machine. By optimizing the shape of the ultrasonic sound-emitting surface 3212 and inserting the ultrasonic sound-emitting surface 3212 into the gap of multiple transport rollers 4, the loss of ultrasonic energy can be effectively reduced. At the same time, the thickness of the ultrasonic sound-emitting surface 3212 is narrowed, which can effectively make the released ultrasonic energy more uniform and concentrated, greatly improving the cleaning efficiency. It solves the problem of poor cleaning effect of the existing ultrasonic transducer 3, so as to meet the requirement of cleaning the circuit board 5 in one go, saving costs and improving efficiency.

[0033] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. An ultrasonic transducer for cleaning products on a transport roller in a circuit board ultrasonic cleaning machine, characterized in that: The device includes a vibrator housing, on which multiple vibrator units are disposed. Each vibrator unit includes, from top to bottom, a front cover plate, a piezoelectric ceramic sheet, a rear cover plate, and a prestressed screw. The front cover plate includes a connecting seat and an ultrasonic sound-emitting surface. The thickness of the ultrasonic sound-emitting surface is less than the thickness of the connecting seat, and the ultrasonic sound-emitting surface can be inserted into the gap between multiple transport rollers.

2. The ultrasonic transducer according to claim 1, characterized in that: The ultrasonic emitting surface is flat, and the shape of the ultrasonic emitting surface can make the ultrasonic energy more uniform and concentrated, thereby improving the cleaning efficiency.

3. The ultrasonic transducer according to claim 2, characterized in that: A guide ramp is provided between the connecting seat and the ultrasonic sound-emitting surface.

4. The ultrasonic transducer according to claim 1, characterized in that: It also includes a waterproof silicone gasket. The oscillator housing is provided with a fixing hole that mates with the piezoelectric ceramic sheet. The waterproof silicone gasket is fitted onto the lower end of the oscillator front cover plate. The connecting seat is disposed in the fixing hole. The waterproof silicone gasket can improve the sealing between the oscillator front cover plate and the fixing hole.

5. The ultrasonic transducer according to claim 1, characterized in that: Multiple oscillator units are spaced at equal intervals.

6. An ultrasonic cleaning machine for circuit boards, characterized in that: The device includes a cleaning machine body, a transmission rolling mechanism, and an ultrasonic transducer as described in any one of claims 1-5. The transmission rolling mechanism includes a rolling drive device and a plurality of transport rolling rods. The cleaning machine body is provided with a cleaning tank and support frames provided at both ends of the cleaning tank. The plurality of transport rolling rods are equally spaced on the support frames. The transport rolling rods are provided with spiral transport plates. The ultrasonic transducer is disposed in the cleaning tank, and the ultrasonic sound-emitting surface is disposed in the gaps between the transport rolling rods.

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