An ultrasonic clamp

Abstract

The application discloses an ultrasonic clamp, which comprises a shell, a top plate, an accommodating cavity, an ultrasonic reversing block, an ultrasonic transducer, an ultrasonic vibration isolation part and a vibration table. The top plate is provided with an opening, and the bottom of the top plate is formed with the accommodating cavity. The ultrasonic reversing block is arranged in the accommodating cavity, and the top of the ultrasonic reversing block is provided with a vibration output part and a bearing part. The ultrasonic reversing block is further provided with a vibration input part. The bearing part is located on the circumferential side of the vibration output part, and the vibration output part protrudes outward from the shell through the opening. The ultrasonic transducer is assembled on the vibration input part of the ultrasonic reversing block. One side of the ultrasonic vibration isolation part is connected to the inner side wall of the opening, and the other side is connected to the bearing part. The bottom of the vibration table is connected to the vibration output part. The ultrasonic vibration isolation part of the ultrasonic clamp is located at the vibration zero point of the whole ultrasonic clamp, the vibration isolation and damping effect is improved, most of the vibration is eliminated under the action of the ultrasonic vibration isolation part, the shell is hardly affected by the vibration of the ultrasonic transducer, and the machining precision is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic machining, in particular to an ultrasonic clamp. BACKGROUND

[0002] 5G is divided into two frequency bands of low frequency and high frequency. In the high frequency band with higher efficiency, the communication wavelength is millimeter level, which is very sensitive to metal and the metal will directly shield the signal. Therefore, under the high frequency band of 5G, glass and ceramic back cover have a great substitution trend.

[0003] Glass and ceramic both belong to hard and brittle materials. At present, the existing mobile phone glass cover plate on the market is usually processed by ultrasonic wave. The ultrasonic clamp is arranged on the workbench, and the mobile phone glass cover plate is fixed on the ultrasonic clamp during processing. The ultrasonic vibration is transmitted to the mobile phone glass cover plate through the ultrasonic clamp, and the CNC cutter head cuts the mobile phone glass cover plate.

[0004] In the traditional ultrasonic clamp, the ultrasonic vibration isolation structure is arranged at the bottom of the ultrasonic reversing block. After the traditional ultrasonic clamp starts to work, the damping structure arranged at the bottom of the ultrasonic reversing block cannot achieve good vibration isolation and damping effect. Part of the ultrasonic vibration may be transmitted to the parts outside the vibration table, such as the shell, and this part of the ultrasonic vibration will make the shell and other parts vibrate, affecting the processing precision. SUMMARY

[0005] The purpose of the present application is to provide an ultrasonic clamp which can achieve good vibration isolation and damping effect and is beneficial to ensure the processing precision.

[0006] The technical scheme adopted by the present application is as follows:

[0007] An ultrasonic clamp comprises:

[0008] A shell having a top plate and a peripheral wall, the top plate of the shell being provided with an opening, and the bottom of the top plate and the inside of the peripheral wall together forming a receiving cavity;

[0009] An ultrasonic reversing block arranged in the receiving cavity, the top of the ultrasonic reversing block being provided with a vibration output portion and a bearing portion, the bottom of the ultrasonic reversing block being provided with a vibration input portion, the bearing portion being located on the peripheral side of the vibration output portion, and the vibration output portion protruding outward from the shell through the opening;

[0010] An ultrasonic transducer assembled on the vibration input portion of the ultrasonic reversing block;

[0011] An ultrasonic vibration isolation portion connected to the inner side wall of the opening on one side and connected to the bearing portion on the other side; and

[0012] The bottom of the vibration platform is connected to the vibration output part.

[0013] Furthermore, the ultrasonic vibration isolation portion is a ring-shaped vibration-damping arm, and the thickness of the vibration-damping arm is smaller than the thickness of the top plate of the shell.

[0014] Furthermore, a gap is formed between the bottom of the vibration table, the ultrasonic vibration isolation part and the top plate.

[0015] Furthermore, there are two vibration input parts, which are respectively arranged on two opposite sides of the bottom of the ultrasonic commutation block, and each vibration input part is equipped with one ultrasonic transducer.

[0016] Furthermore, at least one commutation amplification hole and an even number of energy focusing amplification holes are provided inside the ultrasonic commutation block. The even number of energy focusing amplification holes are axially symmetrically arranged about the central axis of the ultrasonic commutation block, and the spacing between the energy focusing amplification holes on both sides of the central axis gradually decreases in the vertical upward direction.

[0017] Furthermore, each of the reversing amplifying holes is arranged at intervals along the vertical direction, an even number of the energy focusing amplifying holes are axially symmetrically located on opposite sides of the reversing amplifying hole, and the lowest point of the energy focusing amplifying hole located at the bottom is lower than the highest point of the reversing amplifying hole located at the top, and the highest point of the energy focusing amplifying hole located at the top is higher than the highest point of the reversing amplifying hole located at the top.

[0018] Furthermore, the ultrasonic commutation block has a first side, a second side, a third side and a fourth side, the first side is arranged opposite to the second side, the third side is arranged opposite to the fourth side, the first side is adjacent to the third side and the fourth side, the second side is adjacent to the third side and the fourth side, the first side and the second side are provided with assembly holes, and the assembly holes are connected to the commutation amplification hole, the commutation amplification hole and the energy focusing amplification hole pass through the third side and the fourth side, and inclined surfaces are provided between the first side and the top of the ultrasonic commutation block and between the second side and the top of the ultrasonic commutation block, and the distance between the two inclined surfaces gradually decreases in the vertical upward direction.

[0019] Furthermore, the inclination angle of the inclined surface differs from the inclination angle of the energy-focusing and amplifying hole by 0°-5°.

[0020] Furthermore, a plurality of first vibration unit plates are formed on the top of the vibration table, and adjacent first vibration unit plates are separated by first grooves. The first vibration unit plates are symmetrically arranged in pairs about the symmetry plane of the vibration table, or the first vibration unit plates themselves are symmetrically arranged about the symmetry plane of the vibration table.

[0021] Further, the vibration table is provided with a plurality of first perforations on two side portions adjacent to the top portion, the first perforations are perpendicular to the length direction of the vibration table, the first perforations are located between the bottom surface and the top surface of the vibration table, the first perforations are symmetrically distributed about the lateral symmetry plane of the vibration table or the first perforations are symmetrically distributed about the lateral symmetry plane of the vibration table by themselves, the second vibration unit plate is provided with a second perforation, and the second perforation is perpendicular to the top surface of the vibration table.

[0022] Further, the vibration table is in an inverted trapezoidal shape, and the bottom portion of the vibration table is gradually inclined upward from the middle to the two ends.

[0023] Further, the workpiece bearing table is an acrylic plate, the acrylic plate is assembled on the top portion of the vibration table, a plurality of second vibration unit plates are formed on the acrylic plate, adjacent second vibration unit plates are spaced apart by a second groove, and the second vibration unit plates are symmetrically arranged about the symmetry plane of the acrylic plate or the second vibration unit plates are symmetrically arranged about the symmetry plane of the acrylic plate by themselves.

[0024] Beneficial effects: in the application, the top plate of the shell is provided with an opening, the top portion of the ultrasonic reversing block is provided with a vibration output portion and a bearing portion, the vibration output portion protrudes outward from the shell through the opening, the ultrasonic vibration isolation portion is connected between the inner side wall of the opening and the bearing portion, and the zero vibration principle is combined. The vibration zero point is located at or near the contact position of the ultrasonic vibration isolation portion and the bearing portion, thereby improving the vibration isolation and damping effect of the ultrasonic vibration isolation portion. Most of the vibration is eliminated under the action of the ultrasonic vibration isolation portion, and the shell is hardly affected by the vibration of the ultrasonic transducer, thereby ensuring the precision of processing. BRIEF DESCRIPTION OF DRAWINGS

[0025] The application will be further described below in combination with the drawings and embodiments:

[0026] Figure 1 It is a structural schematic view of the ultrasonic clamp in an embodiment;

[0027] Figure 2 It is a structural schematic view of the ultrasonic clamp in an embodiment; Figure 1 It is a structural schematic view of the ultrasonic clamp in an embodiment;

[0028] Figure 3 It is a structural schematic view of the ultrasonic clamp in an embodiment; Figure 1 It is a sectional view of the ultrasonic clamp in an embodiment;

[0029] Figure 4 It is a sectional view of the ultrasonic clamp in an embodiment; Figure 3 It is an enlarged view of position A in the ultrasonic clamp in an embodiment;

[0030] Figure 5 It is an enlarged view of position A in the ultrasonic clamp in an embodiment;Figure 1 a partial view of the embodiment of the present application;

[0031] Figure 6 a partial view of the embodiment of the present application; Figure 5 a partial view of the embodiment of the present application;

[0032] Figure 7 a partial view of the embodiment of the present application; Figure 6 a partial view of the embodiment of the present application;

[0033] Figure 8 a partial view of the embodiment of the present application; Figure 6 a partial view of the embodiment of the present application;

[0034] Figure 9 a partial view of the embodiment of the present application; Figure 6 a partial view of the embodiment of the present application;

[0035] Figure 10 a partial view of the embodiment of the present application; Figure 1 a partial view of the embodiment of the present application;

[0036] Figure 11 a partial view of the embodiment of the present application;

[0037] Figure 12 a partial view of the embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other different ways than those described herein, and those skilled in the art can make similar improvements without departing from the spirit and scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0039] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present. The terms "vertical", "horizontal", "left", "right", and the like as used herein are used for explanation purposes only and are not intended to be limiting.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Various technical features are described in this detailed description. For purposes of summarizing the disclosure, certain technical features are described herein that can be implemented in con¬j unction with other technical features. However, these features are not necessarily mutually exclusive, and a given feature can be implemented with one or more other features but can be implemented without them. Moreover, each individual technical feature is described in sufficient detail herein by being described with respect to at least one embodiment.

[0041] Referring to Figures 1 to 3 The ultrasonic clamp 10 in an embodiment is used for assisting the machining of hard and brittle materials such as mobile phone glass covers in an ultrasonic manner. During operation, the mobile phone glass cover is fixed on the ultrasonic clamp 10, and ultrasonic vibration is transmitted to the mobile phone glass cover through the ultrasonic clamp 10, while the CNC tool head performs cutting machining on the mobile phone glass cover. The ultrasonic clamp 10 comprises a base 100, an outer shell 200, an ultrasonic reversing block 300, an ultrasonic transducer 400, a vibration table 500, a workpiece bearing table 600, and an ultrasonic vibration isolation part.

[0042] Specifically, the outer shell 200 is arranged on the base 100 and cooperates with the base 100 to form a containing cavity 100a. For example, the base 100 is in a plate structure, and the outer shell 200 is in a shell structure. The base 100 is arranged at the bottom of the outer shell 200 and seals the bottom of the outer shell 200. Alternatively, the base 100 is fastened to the bottom of the outer shell 200 by screws or other fasteners. A sealing member can also be arranged between the base 100 and the outer shell 200 to increase the sealing between the base 100 and the outer shell 200.

[0043] Further, the bottom of the outer shell 200 is also provided with a mounting plate 210, and mounting holes 211 are formed in the mounting plate 210. Screws or other fasteners are arranged in the mounting holes 211 to fix the outer shell 200 to the machine tool workbench. For example, the mounting plate 210 can be integrally formed with the outer shell 200, and the mounting holes 211 can be long strip-shaped holes to facilitate adjustment of the position of the ultrasonic clamp 10.

[0044] The ultrasonic reversing block 300 is fixed on the base 100 and located in the accommodating cavity 100a. Specifically, opposite sides of the ultrasonic reversing block 300 are provided with vibration input portions 310, a top of the ultrasonic reversing block 300 is provided with a vibration output portion 320, an inside of the ultrasonic reversing block 300 is provided with at least one reversing amplification hole 330 and an even number of energy focusing amplification holes 340, the even number of energy focusing amplification holes 340 are arranged symmetrically about a central axis of the ultrasonic reversing block 300, and a spacing between the energy focusing amplification holes 340 on both sides of the central axis gradually decreases in a vertical upward direction. The reversing amplification hole 330 is used for first reversing and amplifying the ultrasonic vibration in the horizontal direction, and the energy focusing amplification hole 340 is used for second reversing and amplifying the ultrasonic vibration. Since the spacing between the energy focusing amplification holes 340 on both sides of the central axis gradually decreases in the vertical upward direction, the ultrasonic vibration is converged on the vibration output portion 320 after being secondly reversed by the energy focusing amplification hole 340, thereby playing a certain energy focusing role.

[0045] The ultrasonic transducer 400 is located in the accommodating cavity 100a and is installed on the vibration input portion 310. Specifically, the number of ultrasonic transducers 400 is two, and the two ultrasonic transducers 400 are respectively installed on the two vibration input portions 310. Therefore, the ultrasonic vibration in the horizontal direction generated by the ultrasonic transducer 400 is transmitted to the ultrasonic reversing block 300 through the vibration input portion 310 and is output to the vibration table 500 through the vibration output portion 320 after being reversed and amplified by the ultrasonic reversing block 300. Of course, in other embodiments, the vibration input portion 310 can also be arranged on the bottom surface of the ultrasonic reversing block.

[0046] Since the vibration output portion 320 is on the top of the ultrasonic reversing block 300, the inside of the ultrasonic reversing block 300 is provided with at least one reversing amplification hole 330 and an even number of energy focusing amplification holes 340, the even number of energy focusing amplification holes 340 are arranged symmetrically about a central axis of the ultrasonic reversing block 300, and a spacing between the energy focusing amplification holes 340 on both sides of the central axis gradually decreases in a vertical upward direction, therefore the ultrasonic vibration generated by the ultrasonic transducer 400 is transmitted to the ultrasonic reversing block 300 through the horizontal vibration input portion 310, is reversed and amplified by the reversing amplification hole 330, is further energy focused and amplified by the energy focusing amplification hole 340, and is then output by the vibration output portion 320. Not only can the ultrasonic vibration in the horizontal direction be converted into the vertical direction, but also the height of the ultrasonic clamp 10 can be effectively reduced from the overall structural form, and the ultrasonic vibration can be energy focused and amplified, thereby reducing the height of the ultrasonic clamp 10 from the size, and the overall height of the ultrasonic clamp 10 is reduced from both the structure and the size, so as to be suitable for the CNC machining machine tool.

[0047] It should be noted that the "horizontal direction" and "vertical direction" in the present disclosure are only used as an example for the case where the ultrasonic clamp 10 is horizontally installed on the machine tool table, but this does not constitute a limitation on the scope of protection. For example, when the ultrasonic clamp 10 is vertically installed on the machine tool table, the "horizontal direction" and "vertical direction" also need to be adjusted according to the installation direction of the ultrasonic clamp 10.

[0048] Further, the plurality of switching amplification holes 330 are arranged in the vertical direction, and the even number of energy focusing amplification holes 340 are symmetrically located on opposite sides of the switching amplification hole 330. The lowest point of the lowermost energy focusing amplification hole 340 is lower than the highest point of the uppermost switching amplification hole 330, and the highest point of the uppermost energy focusing amplification hole 340 is higher than the highest point of the uppermost switching amplification hole 330. That is, the uppermost switching amplification hole 330 and the lowermost energy focusing amplification hole 340 overlap in space in the horizontal direction. The purpose of such arrangement is to further improve the amplification effect of the energy focusing amplification hole 340.

[0049] Please refer to Figures 3 to 7 In the embodiment shown in the figure, the number of switching amplification holes 330 is one, and the center axis of the switching amplification hole 330 coincides with the center axis of the ultrasonic switching block 300. The number of energy focusing amplification holes 340 is two, and the two energy focusing amplification holes 340 are symmetric about the center axis. Arranging the energy focusing amplification holes 340 symmetric about the center axis is beneficial to more uniform transmission of ultrasonic vibration to the vibration table 500 on the left and right sides. Arranging the number of switching amplification holes 330 to be one and the number of energy focusing amplification holes 340 to be two is beneficial to simplify the structure and reduce the difficulty of manufacturing.

[0050] Further, the two energy focusing amplification holes 340 are located on opposite sides of the switching amplification hole 330, and the lowest point of the energy focusing amplification hole 340 is lower than the highest point of the switching amplification hole 330, and the highest point of the energy focusing amplification hole 340 is higher than the highest point of the switching amplification hole 330. That is, the switching amplification hole 330 and the energy focusing amplification hole 340 overlap in space in the horizontal direction, so that the ultrasonic vibration is more easily transmitted from the side wall of the switching amplification hole 330 to the side wall of the energy focusing amplification hole 340, and in combination with the energy focusing effect of the energy focusing amplification hole 340, the ultrasonic vibration can be better transmitted to the vibration output part 320.

[0051] Of course, in other embodiments, the number of switching amplification holes 330 can also be two, three, etc., and the number of energy focusing amplification holes 340 can also be four, six, etc.

[0052] Please continue to refer to Figure 7The ultrasonic reversing block 300 has a first side 301, a second side 302, a third side 303 and a fourth side 304. The first side 301 is opposite to the second side 302, and the third side 303 is opposite to the fourth side 304. The first side 301 is adjacent to the third side 303 and the fourth side 304, and the second side 302 is adjacent to the third side 303 and the fourth side 304. The first side 301 and the second side 302 are provided with an assembly hole 350, and the assembly hole 350 is in communication with the reversing amplification hole 330. The reversing amplification hole 330 and the energy focusing amplification hole 340 penetrate through the third side 303 and the fourth side 304, so that the ultrasonic vibration can be transmitted more uniformly, and the machining precision is improved.

[0053] Further, the first side 301 and the top of the ultrasonic reversing block 300, and the second side 302 and the top of the ultrasonic reversing block 300 are provided with inclined surfaces 360. The distance between the two inclined surfaces 360 gradually decreases in the vertical upward direction. In some embodiments, the inclined surfaces 360 are provided. When the ultrasonic vibration is transmitted from the ultrasonic transducer 400 to the ultrasonic reversing block 300, the distance between the two inclined surfaces 360 gradually decreases in the vertical upward direction, which can further play a role in energy focusing and amplification.

[0054] Further, the inclination angle of the inclined surface 360 and the inclination angle of the energy focusing amplification hole 340 differ by 0°-5°, so that the inclined surface 360 and the energy focusing amplification hole 340 are not parallel, which can further reverse the transmission direction of the ultrasonic vibration for the third time, so as to ensure that the ultrasonic vibration is output along the vibration output part 320. For example, in the present embodiment, the inclination angle of the inclined surface 360 and the inclination angle of the energy focusing amplification hole 340 differ by 4.5°.

[0055] The top of the ultrasonic reversing block 300 is provided with a first vacuum adsorption hole 370, and the side of the ultrasonic reversing block 300 adjacent to the vibration input part 310 is provided with a second vacuum adsorption hole 380. The first vacuum adsorption hole 370 and the second vacuum adsorption hole 380 are in communication. Therefore, the ultrasonic clamp 10 adsorbs and fixes the workpiece by vacuum adsorption.

[0056] The ultrasonic transducer 400 includes a first piezoelectric sheet 410, a second piezoelectric sheet 420, a first electrode sheet 430, a second electrode sheet 440 and a fastener 450. The fastener 450 is sequentially arranged in the first piezoelectric sheet 410, the first electrode sheet 420, the second piezoelectric sheet 430 and the second electrode sheet 440, and is fastened to the vibration input part 310.

[0057] The top surface of the housing 200 is provided with an opening 201, through which the vibration output unit 320 protrudes from the housing 200. The vibration table 500 is fixed to the vibration output unit 320, and the workpiece support platform 600 is fixed to the vibration table 500. The workpiece support platform 600 is used to place the workpiece to be processed, such as a mobile phone glass cover. For example, the workpiece support platform 600 can be fixed to the vibration table 500 using fasteners such as screws. Of course, in other embodiments, the workpiece support platform 600 can also be integrally formed with the vibration table 500.

[0058] Please continue reading Figure 8 A plurality of first vibration unit plates 510 are formed on the top of the vibration table 500. Adjacent first vibration unit plates 510 are separated by grooves 520. The first vibration unit plates 510 are arranged symmetrically with respect to the symmetry plane of the vibration table 500, or the first vibration unit plates 510 themselves are arranged symmetrically with respect to the symmetry plane of the vibration table 500. The sizes of the plurality of first vibration unit plates 510 can be set to be all the same or different. In this embodiment, the first vibration unit plates 510 include two sizes, specifically including eight small-sized first vibration unit plates 510 and one large-sized first vibration unit plate 510. The large-sized first vibration unit plate 510 is located at the center of the top of the vibration table 500 and is arranged symmetrically with respect to the symmetry plane of the vibration table 500. The small-sized first vibration unit plates 510 are arranged symmetrically with respect to the symmetry plane of the vibration table 500. The top of the entire vibration table 500 is divided into several areas, and this structure is more conducive to achieving uniform vibration distribution.

[0059] Meanwhile, the large-sized first vibration unit plate 510 located in the center may be replaced by two small-sized first vibration unit plates 510 that are symmetrically arranged about the symmetry plane of the vibration table 500 .

[0060] Combine Figure 11 and Figure 12 Finite element modal analysis diagram of Figure 11 The figure shows the vibration distribution diagram of the top surface of the vibration table 500 on which a plurality of first vibration unit plates 510 are evenly arranged. The vibration distribution is relatively uniform. The top of the vibration table 500 is formed with a plurality of first vibration unit plates 510 divided by first grooves 520. The plurality of first vibration unit plates 510 are arranged symmetrically with respect to the symmetry plane of the vibration table 500, or the first vibration unit plates 510 themselves are arranged symmetrically with respect to the symmetry plane of the vibration table 500. Finite element modal analysis shows that the ultrasonic vibration table designed with the above structure has a uniform vibration distribution when transmitting ultrasonic vibration, which is conducive to achieving uniform processing of the product and ensuring the processing quality of the product. For comparison, Figure 12The vibration mode diagram of the existing aluminum profile vibration table is shown in the figure, and the top of the vibration table is not provided with vibration unit plates spaced from each other, so the vibration distribution diagram is obviously in the form of large at both ends and weak in the middle, which is difficult to meet the processing requirements.

[0061] Further, the vibration table 500 is provided with a plurality of first perforations 530 on the two side portions adjacent to the top portion. The first perforations 530 are located between the bottom surface and the top surface of the vibration table 500, and the first perforations 530 are perpendicular to the length direction of the vibration table 500, where the length direction refers to the direction of the two end portions of the vibration table 500. The first perforations 530 are symmetrically distributed about the lateral symmetry plane of the vibration table 500, or the first perforations 530 are symmetrically distributed about the lateral symmetry plane of the vibration table 500. The lateral symmetry plane is perpendicular to the length direction of the vibration table 500. After the vibration passes through the first perforations 530 located inside the vibration table 500, the vibration is further divided through modal deformation, so that the vibration distribution is more uniform, and the situation that the vibration is concentrated at the two end portions is effectively avoided.

[0062] In this embodiment, the top surface of the vibration table 500 is substantially rectangular, and the length direction is consistent with the long side direction of the rectangle. The number of the first perforations 530 is two, and the first perforations 530 are symmetrically distributed on the two sides of the lateral symmetry plane of the vibration table 500. It can be understood that the number of the first perforations 530 is not limited to two, but can also be three or more, and the shape of the first perforations 530 is not limited to a circle or an ellipse. When the number of the first perforations 530 is odd, the first perforation 530 located in the middle is symmetrically distributed about the lateral symmetry plane of the vibration table 500, and the remaining first perforations 530 are symmetrically distributed about the lateral symmetry plane of the vibration table 500 in pairs. When the number of the first perforations 530 is even, the first perforations 530 are symmetrically distributed about the lateral symmetry plane of the vibration table 500 in pairs.

[0063] At the same time, the first vibration unit plate 510 is provided with second perforations 540, and the second perforations 540 are perpendicular to the top surface of the vibration table 500. The second perforations 540 are perpendicular to the first perforations 530 in space, and the vibration table 500 is ensured to be further uniformly distributed in the vibration of the processing surface through modal deformation in the horizontal and vertical directions.

[0064] As a preferred, the vibration table 500 is integrally processed into an inverted trapezoid, and the bottom portion of the vibration table 500 is gradually inclined upward from the middle to the two ends. The bottom portion of the vibration table 500 is provided in a diverging curved surface shape, which assists in achieving uniform distribution of vibration.

[0065] The top center of the vibration table 500 is provided with a plurality of mounting counterbores 550, which penetrate the bottom of the vibration table 500. The top of the ultrasonic reversing block 300 is correspondingly provided with threaded holes. Screws are inserted into the mounting counterbores 550 and screwed with the threaded holes, so as to realize the fixed installation of the vibration table 500 on the ultrasonic reversing block 300.

[0066] Please continue to refer to Figure 9 The workpiece bearing table 600 is an acrylic plate, which is assembled on the top of the vibration table 500. The top of the acrylic plate is formed with a plurality of second vibration unit plates 610. Adjacent second vibration unit plates 610 are spaced apart by second grooves 640. The second vibration unit plates 610 are symmetrically arranged about the symmetry plane of the acrylic plate, or the second vibration unit plates 610 are symmetrically arranged about the symmetry plane of the acrylic plate. The second vibration unit plates 610 are arranged in the same way as the first vibration unit plates 510. Therefore, the second vibration unit plates 610 also have the effect of making the vibration distribution uniform. In this example, the sizes of the plurality of second vibration unit plates 610 are all set to be the same.

[0067] The acrylic plate is selected as the workpiece bearing table 600. On the one hand, since the acrylic plate has the characteristic of small hardness, it is easy to deform when receiving vibration, which effectively makes the strong vibration weak and the weak vibration strong, so as to make the vibration distribution more uniform. At the same time, the acrylic plate with small hardness can also play a buffering role on the machining workpieces such as mobile phone glass cover plates, so as to avoid causing great damage to the glass machining workpieces during the machining process, and greatly prevent the glass from breaking. On the other hand, since the acrylic plate does not generate heat, it will not cause a burning sensation on the machining workpieces such as mobile phone glass cover plates, thereby damaging the workpieces.

[0068] The second vibration unit plates 610 on the acrylic plate are provided with positioning holes 620. Correspondingly, the second through holes 540 on the first vibration unit plates 510 are provided with internal threads. The acrylic plate can be fixed and installed in the second through holes 540 by screws.

[0069] The middle part of the vibration table 500 is provided with a third vacuum suction hole 560, and the middle part of the acrylic plate is provided with a fourth vacuum suction hole 630. The third vacuum suction hole 560 and the fourth vacuum suction hole 630 are connected in a top-down manner and form an air passage penetrating through the vibration table 500 and the acrylic plate. The air passage can be connected with a vacuum suction device, so as to facilitate the connection of the vacuum suction device.

[0070] Further, the top of the ultrasonic reversing block 300 is also provided with a bearing part 390, which is located on the periphery of the vibration output part 320. For example, the bearing part 390 can be located on the periphery of one end of the vibration output part 320. Referring to Figure 10The shell 200 has a top plate 220 and a peripheral wall 230, and the opening 201 is formed on the top plate 220. The bottom of the top plate 220 and the inside of the peripheral wall 230 jointly form the accommodating cavity 100a. One side of the ultrasonic vibration isolation part is connected to the inner side wall of the opening 201, and the other side is connected to the bearing part. That is, the ultrasonic vibration isolation part is connected between the inner side wall of the opening 201 and the bearing part 390, and is located at or near the vibration zero point of the entire ultrasonic clamp 10. Thus, the vibration isolation and damping effect of the ultrasonic vibration isolation part is improved, most of the vibration is eliminated under the action of the ultrasonic vibration isolation part, the shell 200 is hardly affected by the vibration of the ultrasonic transducer 400, and the processing accuracy is ensured.

[0071] Specifically, the ultrasonic vibration isolation part can be a ring-shaped damping arm 202, and the thickness of the damping arm 202 is less than the thickness of the top plate 220 of the shell 200. The top plate 220 of the shell 200 is connected to the bearing part 390 through the damping arm, so the top plate 220 of the shell 200 is not directly connected to the bearing part 390. In this embodiment, the damping arm 202 is protruded on the inner side wall of the opening 201 and is lapped on the bearing part 390. The vibration output part 320 is protruded outside the shell 200 through the opening 201.

[0072] After assembly, the damping arm 202 is lapped on the bearing part 390, and the vibration output part 320 is protruded outside the shell 200 through the opening 201. During operation, ultrasonic vibration is transmitted to the vibration table 500 through the vibration output part 320. Since the shell 200 is lapped on the bearing part 390 through the damping arm 202, the ultrasonic vibration of the vibration output part 320 is transmitted to the damping arm 202. Since the thickness of the damping arm 202 is less than the thickness of the top plate 220 of the shell 200, the damping arm 202 is more likely to deform than the top plate 220 of the shell 200, and the ultrasonic vibration transmitted by the vibration output part 320 is offset. Therefore, the ultrasonic vibration transmitted by the vibration output part 320 is not or rarely transmitted to the shell 200, so that the shell 200 is not affected by the ultrasonic vibration, and the processing accuracy is ensured.

[0073] In addition, in the illustrated embodiment, the vibration output part 320 is on the top of the ultrasonic reversing block 300, and the vibration input part 310 is on the bottom of the ultrasonic reversing block 300. According to the zero point vibration principle, the zero point vibration is located at the contact position of the damping arm 202 and the bearing part 390. Therefore, the damping arm 202 is arranged on the inner side wall of the opening 201 of the shell 200. The ultrasonic vibration received by the damping arm 202 at this position is very small or even close to zero, so it is more conducive to avoid the transmission of ultrasonic vibration to the shell 200.

[0074] Further, the damping arm 202 has a lapping surface 203 and a welding surface 204, the damping arm 202 is lapped on the bearing part 390 through the lapping surface 203, and the damping arm 202 is welded on the side surface of the vibration output part 320 through the welding surface 204. Therefore, the damping arm 202 is fixed on the ultrasonic reversing block 300 through welding. For example, a half V-shaped groove can be formed on the damping arm 202, a half V-shaped groove is formed on the vibration output part 320, the two half V-shaped grooves constitute a V-shaped groove, and then the V-shaped groove is filled with solder for welding, which can improve the firmness between the damping arm 202 and the ultrasonic reversing block 300.

[0075] As preferred, a gap is formed between the bottom of the vibration table 500 and the ultrasonic vibration isolation part and the top plate 220, which ensures that the vibration table 500 receiving vibration does not contact the ultrasonic vibration isolation part and the top plate 200, and avoids the ultrasonic vibration of the vibration table 500 being transmitted to the shell 200 through the boss 205.

[0076] Further, the top surface of the damping arm 202 is provided with a boss 205, the opening 201 penetrates the boss 205, the inner side wall of the boss 205 is flush with the welding surface 204, and the top surface of the boss 205 is lower than the top surface of the vibration output part 320. Therefore, the boss 205 not only increases the contact area between the damping arm 202 and the vibration output part 320 to improve the firmness between the damping arm 202 and the ultrasonic reversing block 300, but also the top surface of the boss 205 is lower than the top surface of the vibration output part 320, so the boss 205 does not directly contact the vibration table 500, preventing the ultrasonic vibration of the vibration table 500 from being transmitted to the shell 200 through the boss 205. The length of the boss 205 can be less than the thickness of the damping arm 202.

[0077] Of course, in other embodiments, the damping arm 202 is located above the inner side wall of the opening 201, and the top surface of the damping arm 202 is flush with the top surface of the shell 200. For example, the damping arm 202 can be formed by slotting at the bottom of the top plate 220 of the shell 200, thus simplifying the molding process.

[0078] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0079] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An ultrasonic clamp, characterized by, The utility model relates to an ultrasonic vibration table, comprising: a shell with a top plate and a peripheral wall, the top plate of the shell is provided with an opening, and the bottom of the top plate and the inside of the peripheral wall jointly form a receiving cavity; an ultrasonic wave reversing block is arranged in the receiving cavity, the top of the ultrasonic wave reversing block is provided with a vibration output part and a bearing part, the bearing part is located on the side of the vibration output part, the vibration output part protrudes outward from the shell through the opening, and the ultrasonic wave reversing block is further provided with a vibration input part; an ultrasonic transducer is arranged on the vibration input part of the ultrasonic wave reversing block; an ultrasonic wave vibration isolation part is connected to the inner side wall of the opening on one side and connected to the bearing part on the other side, the ultrasonic wave vibration isolation part is an annular damping arm, and the thickness of the damping arm is less than the thickness of the top plate of the shell; and a vibration table, the bottom of the vibration table is supported on the vibration output part; the top of the vibration table is formed with a plurality of first vibration unit plates, adjacent first vibration unit plates are spaced apart by a first groove, and the first vibration unit plates are symmetrically arranged with respect to the symmetry plane of the vibration table or the first vibration unit plates are symmetrically arranged with respect to the symmetry plane of the vibration table.

2. The ultrasonic clamp of claim 1, wherein: The bottom of the vibration table is spaced apart from the ultrasonic wave vibration isolation part and the top plate.

3. The ultrasonic clamp of claim 1, wherein: The number of vibration input parts is two, and each vibration input part is arranged on the opposite side of the ultrasonic wave reversing block, and one ultrasonic transducer is arranged on each vibration input part.

4. The ultrasonic clamp of claim 3, wherein: The inside of the ultrasonic wave reversing block is provided with at least one reversing amplification hole and an even number of energy concentrating amplification holes, the even number of energy concentrating amplification holes are arranged on the central axis of the ultrasonic wave reversing block in axial symmetry, and the spacing between the energy concentrating amplification holes on the two sides of the central axis gradually decreases in the vertical upward direction.

5. The ultrasonic clamp of claim 4, wherein: Each reversing amplification hole is arranged in the vertical direction, the even number of energy concentrating amplification holes are arranged on the opposite sides of the reversing amplification hole in axial symmetry, and the lowest point of the lowermost energy concentrating amplification hole is lower than the highest point of the uppermost reversing amplification hole, and the highest point of the uppermost energy concentrating amplification hole is higher than the highest point of the uppermost reversing amplification hole.

6. Ultrasonic clamp according to any of claims 4 and 5, characterized in that: The ultrasonic wave reversing block has a first side, a second side, a third side and a fourth side, the first side and the second side are arranged opposite to each other, the third side and the fourth side are arranged opposite to each other, the first side is adjacent to the third side and the fourth side, the second side is adjacent to the third side and the fourth side, the first side and the second side are provided with an assembly hole, and the assembly hole is in communication with the reversing amplification hole, the reversing amplification hole and the energy concentrating amplification hole penetrate through the third side and the fourth side, and an inclined surface is arranged between the first side and the top of the ultrasonic wave reversing block and between the second side and the top of the ultrasonic wave reversing block, and the spacing between the two inclined surfaces gradually decreases in the vertical upward direction.

7. The ultrasonic clamp of claim 6, wherein: The inclination angle of the inclined surface and the inclination angle of the energy concentrating amplification hole differ by 0-5 degrees.

8. The ultrasonic clamp of claim 1, wherein: The vibration table is provided with a plurality of first through holes in two side portions adjacent to the top portion of the vibration table, the first through holes are perpendicular to the length direction of the vibration table, the first through holes are located between the bottom surface and the top surface of the vibration table, the first through holes are symmetrically distributed about the lateral symmetry plane of the vibration table or the first through holes are symmetrically distributed about the lateral symmetry plane of the vibration table by themselves, and the first vibration unit plate is provided with second through holes, the second through holes are perpendicular to the top surface of the vibration table.

9. The ultrasonic clamp of claim 8, wherein: The vibration table is in the shape of an inverted trapezoid, and the bottom portion of the vibration table is gradually inclined upward from the middle to the two ends.

10. The ultrasonic clamp of claim 9, wherein: The workpiece carrying table is also provided, which is an acrylic plate assembled on the top portion of the vibration table, a plurality of second vibration unit plates are formed on the acrylic plate, adjacent second vibration unit plates are spaced apart by second grooves, and the second vibration unit plates are symmetrically arranged about the symmetry plane of the acrylic plate or the second vibration unit plates are symmetrically arranged about the symmetry plane of the acrylic plate by themselves.

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