A quick response piezoelectric wire clamp applied to a wire bonding machine and a control method thereof

Abstract

This invention relates to the field of wire bonding machine technology, and specifically discloses a fast-response piezoelectric clamp and its control method for use in wire bonding machines. The fast-response piezoelectric clamp for wire bonding machines includes a clamp body, a piezoelectric ceramic component, and a pre-tightening assembly. The clamp body includes a first clamping arm, a second clamping arm, a displacement amplification section, and a base. The base has an assembly cavity. The connecting ends of the first and second clamping arms are both connected to the base, and the first and second clamping arms are arranged opposite to each other. The two ends of the displacement amplification section are respectively connected to the connecting ends of the first and second clamping arms. The piezoelectric ceramic component is disposed in the assembly cavity, with one end abutting against the displacement amplification section. The pre-tightening assembly is disposed in the clamp body, abutting against the other end of the piezoelectric ceramic component, and is used to apply a pre-tightening force. By controlling the opening and closing of the clamp body through the piezoelectric ceramic component, the response speed is accelerated, while the clamp oscillation is reduced.

Description

Technical Field

[0001] This invention relates to the field of wire bonding machine technology, and in particular to a fast-response piezoelectric clamp and control method for use in wire bonding machines. Background Technology

[0002] Wire bonding machines utilize wire bonding technology, a highly efficient and precise welding technique. It employs ultrasonic vibration energy to heat and press two or more materials together, thus achieving welding. Therefore, wire bonding machines can be applied in fields such as electronics, automotive, and medical devices. In wire bonding, a wire clamp is typically used in conjunction with the wire bonding machine to hold the metal wire in a more ideal shape, thereby improving the welding efficiency of the machine.

[0003] In the process of implementing the embodiments of this utility model, the inventors of this application discovered that the existing wire clamps used in wire bonding machines are voice coil type wire clamps, which control the opening and closing of the wire clamps through electromagnetic induction. The control accuracy is not high and the response speed is slow, which can no longer meet the industry's growing demand for rapid bonding. Summary of the Invention

[0004] The main technical problem solved by the embodiments of the present invention is to provide a fast-response piezoelectric wire clamp for use in wire bonding machines. By using piezoelectric ceramic components to control the opening and closing of the clamp body, high-precision control of the opening and closing of the clamp body can be achieved, the response speed can be accelerated, the vibration of the clamp body can be reduced, and the user experience can be improved.

[0005] To solve the above-mentioned technical problems, the present invention provides a fast-response piezoelectric wire clamp for use in a wire bonding machine, comprising a clamp body, a piezoelectric ceramic component, and a pre-tightening assembly. The clamp body includes a first clamping arm, a second clamping arm, a displacement amplification section, and a base. The base has an assembly cavity. The connecting ends of the first and second clamping arms are both connected to the base, and the first and second clamping arms are arranged opposite to each other. The two ends of the displacement amplification section are respectively connected to the connecting ends of the first and second clamping arms. The piezoelectric ceramic component is disposed in the assembly cavity, with one end abutting against the displacement amplification section. The piezoelectric ceramic component is used to drive the clamping ends of the first and second clamping arms to move towards or away from each other. The pre-tightening assembly is disposed in the clamp body, abutting against the other end of the piezoelectric ceramic component. The pre-tightening assembly is used to adjust the pre-tightening force applied to the piezoelectric ceramic component.

[0006] Optionally, the fast-response piezoelectric clamp applied to the wire bonding machine further includes a first clamping plate and a second clamping plate; the first clamping plate is disposed at the clamping end of the first clamping arm, and the first clamping plate is located on the surface of the first clamping arm facing the second clamping arm; the second clamping plate is disposed at the clamping end of the second clamping arm, and the second clamping plate is located on the surface of the second clamping arm facing the first clamping arm, and the first clamping plate and the second clamping plate are disposed opposite to each other.

[0007] Optionally, the clamping end of the first clamping arm facing the second clamping arm is provided with a first clamping piece fixing surface, the first clamping piece is fixed to the first clamping piece fixing surface, and the first clamping piece protrudes from the surface of the first clamping arm facing the second clamping arm; and / or, the clamping end of the second clamping arm facing the first clamping arm is provided with a second clamping piece fixing surface, the second clamping piece is fixed to the second clamping piece fixing surface, and the second clamping piece protrudes from the surface of the second clamping arm facing the first clamping arm.

[0008] Optionally, the fast-response piezoelectric clamp applied to the wire bonding machine further includes a positioning component. The positioning component includes a connector and a guide post. One end of the connector is disposed at the clamping end of the second clamping arm, and the guide post is connected to the other end of the connector. The guide post is provided with a guide hole. Along the direction of the guide post toward the connector, the projection of the guide hole is located between the first clamping plate and the second clamping plate.

[0009] Optionally, the base body is further provided with a threaded through hole, which communicates with the assembly cavity; the pre-tightening assembly includes a clamping member and a first bolt, the first bolt is screwed into the threaded through hole, the clamping member is located in the assembly cavity, one side of the clamping member abuts against the piezoelectric ceramic part, and the other side of the clamping member is connected to the first bolt.

[0010] Optionally, the preload assembly further includes a second bolt, wherein the first bolt is partially screwed into the end of the threaded through hole facing the assembly cavity, and the second bolt is screwed into the end of the threaded through hole facing away from the assembly cavity, and the second bolt abuts against the first bolt.

[0011] Optionally, the piezoelectric ceramic component is constructed by stacking multiple layers of piezoelectric ceramics, wherein some or all of the piezoelectric ceramics are used to generate deformation.

[0012] Optionally, the displacement amplification section includes a first hinge end, a second hinge end, and an abutment center end. The first ends of the first hinge end and the second hinge end are respectively disposed at both ends of the abutment center end, and the first hinge end and the second hinge end have the same orientation. The second end of the first hinge end is connected to a first clamping arm, and the second end of the second hinge end is connected to a second clamping arm. The angle between the extension lines of the first hinge end and the second hinge end is an acute angle, and one side of the abutment center end abuts against the piezoelectric ceramic component.

[0013] Optionally, the fast-response piezoelectric clamp for the wire bonding machine further includes a control circuit board. The control circuit board is encapsulated in the fast-response piezoelectric clamp for the wire bonding machine. The piezoelectric ceramic component is electrically connected to the control circuit board. The control circuit board further includes a power supply module, a microprocessor, a signal amplification module, a memory, and a communication module. The power supply module is used to supply power to the control circuit board. The microprocessor is connected to the signal amplification module, the memory, and the communication module. The memory is used to store historical signals. The signal amplification module outputs voltage to the piezoelectric ceramic component, causing the piezoelectric ceramic component to actuate.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is: providing a method for controlling the above-mentioned fast-response piezoelectric clamp applied to a wire bonding machine, the method further comprising: receiving a control command; determining whether the control command is a wire loosening command or a wire clamping command; if the control command is a wire loosening command, controlling the piezoelectric ceramic component to amplify the extrusion displacement, thereby increasing the distance between the first clamping arm and the second clamping arm; if the control command is a wire clamping command, controlling the piezoelectric ceramic component to weaken the extrusion displacement amplification, thereby decreasing the distance between the first clamping arm and the second clamping arm.

[0015] The beneficial effects of this invention are as follows: Unlike the prior art, the fast-response piezoelectric clamp of this invention applied to a wire bonding machine includes a clamp body, a piezoelectric ceramic component, and a pre-tightening assembly. The clamp body includes a first clamping arm, a second clamping arm, a displacement amplification section, and a base. The base has an assembly cavity. The connecting ends of the first and second clamping arms are both connected to the base, and the first and second clamping arms are arranged opposite to each other. The two ends of the displacement amplification section are respectively connected to the connecting ends of the first and second clamping arms. The piezoelectric ceramic component is disposed in the assembly cavity, with one end abutting against the displacement amplification section. The piezoelectric ceramic component drives the clamping ends of the first and second clamping arms to move towards or away from each other. Through the above method, the opening and closing of the clamp body can be controlled by the piezoelectric ceramic component, thereby accelerating the response speed.

[0016] The fast-response piezoelectric wire clamp of the present invention applied to the wire bonding machine also includes a control circuit board. The control circuit board is packaged in the wire clamp 1. The piezoelectric ceramic component is electrically connected to the control circuit board. The control circuit board precisely controls the opening and closing of the wire clamp body by applying an excitation voltage to the piezoelectric ceramic component.

[0017] In addition, a pre-tightening component is disposed on the wire clamp body and abuts against the other end of the piezoelectric ceramic component. The pre-tightening component is used to adjust the pre-tightening force applied to the piezoelectric ceramic component. Through this method, the pre-tightening force of the wire clamp can be adjusted, thereby controlling the opening degree of the wire clamp and improving the user experience. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a fast-response piezoelectric clamp applied to a wire bonding machine according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the clamp body of the fast-response piezoelectric clamp applied to a wire bonding machine according to an embodiment of the present invention;

[0021] Figure 3 This is another schematic diagram of the fast-response piezoelectric clamp of the present invention applied to a wire bonding machine;

[0022] Figure 4 This is an exploded view of the fast-response piezoelectric clamp of the present invention applied to a wire bonding machine according to an embodiment of the present invention;

[0023] Figure 5 This is an exploded view of another embodiment of the fast-response piezoelectric clamp of the present invention applied to a wire bonding machine;

[0024] Figure 6 This is a simplified control logic diagram of the fast-response piezoelectric clamp applied to a wire bonding machine according to an embodiment of the present invention.

[0025] Explanation of reference numerals: 1000, Fast-response piezoelectric wire clamp for wire bonding machines; 1, Clamp body; 2, Piezoelectric ceramic component; 3, Pre-tightening assembly; 4, First clamping piece; 5, Second clamping piece; 6, Positioning assembly;

[0026] 11. First clamping arm; 12. Second clamping arm; 13. Displacement amplification section; 14. Base;

[0027] 111. First conical portion; 112. First horizontal portion; 113. First hollowed-out portion; 114. First clamping plate fixing surface;

[0028] 121. Second conical portion; 122. Second horizontal portion; 123. Second hollowed-out portion; 124. Second clamping plate fixing surface;

[0029] 131. First hinge end; 132. Second hinge end; 133. Abutting center end;

[0030] 141. First wall; 142. Second wall; 143. Third wall; 144. Assembly cavity; 145. Threaded through hole; 146. Wire groove;

[0031] 31. First bolt; 32. Second bolt; 33. Clamping element;

[0032] 61. Connector; 62. Wire post; 621. Wire hole. Detailed Implementation

[0033] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated; thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] Please see Figure 1 The fast-response piezoelectric wire clamp 1000, used in wire bonding machines, includes a clamp body 1, a piezoelectric ceramic component 2, and a pre-tightening assembly 3. The piezoelectric ceramic component 2 and the pre-tightening assembly 3 are disposed on the clamp body 1. One end of the piezoelectric ceramic component 2 abuts against the clamp body 1, and the other end abuts against the pre-tightening assembly 3. The other end of the pre-tightening assembly 3 is connected to the clamp body 1. The piezoelectric ceramic component 2 can drive the clamp body 1 to clamp or release an object to be clamped, such as a metal wire. The pre-tightening assembly 3 is used to adjust the pre-tightening force applied to the piezoelectric ceramic component 2; different pre-tightening forces have different effects on the opening degree of the clamp body 1.

[0038] For the wire clamp body 1 mentioned above, please refer to... Figure 2 The wire clamp body 1 includes a first clamping arm 11, a second clamping arm 12, a displacement amplification section 13, and a base 14. The base 14 has an assembly cavity 144. The connecting ends of the first clamping arm 11 and the second clamping arm 12 are both connected to the base 14, and the first and second clamping arms 11 and 12 are arranged opposite to each other. The two ends of the displacement amplification section 13 are respectively connected to the connecting ends of the first and second clamping arms 11 and 12. The base 14 supports the first and second clamping arms 11 and 12, the displacement amplification section 13 adjusts the distance between the first and second clamping arms 11 and 12, and the opposing surfaces of the first and second clamping arms 11 and 12 are used to clamp objects to be clamped.

[0039] For the aforementioned seat 14, please refer to [link / reference needed]. Figure 2The seat 14 is roughly in the shape of a "ko". The upper horizontal side of the "ko" shape of the seat 14 is the first seat wall 141, the lower horizontal side of the "ko" shape of the seat 14 is the second seat wall 142, and the vertical side of the "ko" shape of the seat 14 that connects the first seat wall 141 and the second seat wall 142 is the third seat wall 143. The first seat wall 141 and the third seat wall 143 are roughly perpendicularly connected, as are the second seat wall 142 and the third seat wall 143. The first seat wall 141 and the second seat wall 142 are arranged opposite to each other, and the third seat wall 143 is used to support the first seat wall 141 and the second seat wall 142. At the same time, when the seat 14 undergoes elastic deformation, internal stress is generated, which makes the seat 14 tend to return to its original shape. The first wall 141 of the seat body 14, at the end furthest from the third wall 143, is connected to the connecting end of the first clamping arm 11. The second wall 142 of the seat body 14, at the end furthest from the third wall 143, is connected to the connecting end of the second clamping arm 12, such that the first clamping arm 11 and the second clamping arm 12 are arranged opposite to each other. In this embodiment, the first wall 141, the second wall 142, and the third wall 143 are integrally formed. It can be understood that the connection method between the first wall 141 and the third wall 143, and between the second wall 142 and the third wall 143, can be other methods, such as welding, screwing, or gluing.

[0040] The base 14 is also provided with an assembly cavity 144, which is the area enclosed by the displacement amplification part 13, the first base wall 141, the second base wall 142 and the third base wall 143. The assembly cavity 144 is used to set the piezoelectric ceramic part 2 and the pre-tightening component 3. That is, the piezoelectric ceramic part 2 and the pre-tightening component 3 are embedded in the base 14, which can further reduce the length of the wire clamp body 1 in the thickness direction of the base 14.

[0041] The base 14 is also provided with a threaded through hole 145. Specifically, the threaded through hole 145 is provided in the third base wall 143 of the base 14, the threaded through hole 145 penetrates the third base wall 143, the threaded through hole 145 connects to the assembly cavity 144, and the threaded through hole 145 is used to install the pre-tightening component 3.

[0042] The base 14 is also provided with a wire groove 146, which is recessed into the surface of the base 14. The wire groove 146 is used to install wires, define the position of the wires, protect the wires, prevent them from being exposed to the outside, reduce wear, and also has an aesthetic effect. In this embodiment, two wire grooves 146 are provided, one on the side of the third base wall 143 near the first base wall 141 and the other on the side of the third base wall 143 near the second base wall 142. This allows the wires connecting the piezoelectric ceramic component 2 to be placed in different wire grooves 146, avoiding short circuits caused by wire aging due to long-term use. At the same time, the wire grooves 146 are located on the same surface of the base 14, making manufacturing and processing more convenient. It can be understood that the wire grooves 146 can also be set in different positions of the base 14, and the number of wire grooves 146 can be adjusted according to actual needs. In addition, the wire grooves 146 can also be replaced by wire holes, that is, holes are opened in the base 14 for the wires to pass through.

[0043] The base 14 is also provided with several mounting holes (not shown). The axis of the mounting holes is in the thickness direction of the base 14. Some of the mounting holes are elliptical holes, so that the base 14 has a certain amount of adjustable space when it is installed. The mounting holes are used to install the wire clamp body 1 on other components. In this embodiment, the mounting holes are used to install the wire clamp body 1 on the wire bonding machine.

[0044] For the first clamping arm 11 mentioned above, please refer to [link / reference]. Figure 2 The connecting end of the first clamping arm 11 is connected to one end of the first seat wall 141, and the clamping end of the first clamping arm 11 is the end away from the first seat wall 141. The connecting end of the first clamping arm 11 has a first conical portion 111 and a first horizontal portion 112 facing the clamping end. The cross-section of the first conical portion 111 gradually decreases from the connecting end of the first clamping arm 11 towards the clamping end, until it decreases to the same cross-section as the first horizontal portion 112. That is, the cross-sectional area of ​​the end of the first conical portion 111 connected to the first seat wall 141 is larger than the cross-sectional area of ​​the end of the first conical portion 111 connected to the first horizontal portion 112. The first conical portion 111 is used to strengthen the first horizontal portion 112 and also provides a side parallel to the third seat wall 143 for connecting the displacement amplification portion 13. In other words, one part of the side of the first conical portion 111 connected to the first seat wall 141 is connected to the first seat wall 141, and the other part is connected to one end of the displacement amplification portion 13.

[0045] The first wire clamping arm 11 is also provided with a first hollow portion 113. The first hollow portion 113 does not penetrate the first wire clamping arm 11. The first hollow portion 113 is a groove similar to the first conical portion 111 and the first horizontal portion 112. There are two first hollow portions 113, which are respectively arranged opposite to each other on both sides of the first wire clamping arm 11. The aforementioned two sides of the first wire clamping arm 11 are the two sides perpendicular to the surface of the first wire clamping arm 11 facing the second wire clamping arm 12. That is, the cross-section of the first wire clamping arm 11 at the part where the first hollow portion 113 is provided is "I" shaped. The first hollow portion 113 can ensure that the first wire clamping arm 11 has a certain rigidity while reducing the weight of the fast-response piezoelectric clamp 1000 used in the wire bonding machine, and can also reduce vibration. It is understood that in some other embodiments, the number and shape of the first hollow portion 113 may be different, and the first hollow portion 113 may also penetrate the first wire clamping arm 11.

[0046] For the second clamping arm 12 mentioned above, please refer to [link / reference needed]. Figure 2 The connecting end of the second clamping arm 12 is connected to one end of the second seat wall 142, and the clamping end of the second clamping arm 12 is the end away from the second seat wall 142. A second cone portion 121 and a second horizontal portion 122 are provided at the connecting end of the second clamping arm 12 towards the clamping end. The cross-section of the second cone portion 121 gradually decreases from the connecting end of the second clamping arm 12 towards the clamping end of the second clamping arm 12 until it decreases to the same cross-section as the second horizontal portion 122. That is, the cross-sectional area of ​​the end of the second cone portion 121 connected to the second seat wall 142 is larger than the cross-sectional area of ​​the end of the second cone portion 121 connected to the second horizontal portion 122. The second cone portion 121 is used to strengthen the second horizontal portion 122 and also provides a side parallel to the third seat wall 143 for connecting the displacement amplification portion 13. In other words, a portion of the side of the second cone portion 121 connected to the second seat wall 142 is connected to the second seat wall 142, and the other portion is connected to the other end of the displacement amplification portion 13.

[0047] The second wire clamping arm 12 is also provided with a second hollow portion 123. The second hollow portion 123 does not penetrate the second wire clamping arm 12. The second hollow portion 123 is a groove similar to the second conical portion 121 and the second horizontal portion 122. There are two second hollow portions 123, which are respectively arranged opposite to each other on both sides of the second wire clamping arm 12. The aforementioned two sides of the second wire clamping arm 12 are the two sides perpendicular to the surface of the second wire clamping arm 12 facing the first wire clamping arm 11. That is, the cross-section of the second wire clamping arm 12 at the part where the second hollow portion 123 is provided is "I" shaped. The second hollow portion 123 can ensure that the second wire clamping arm 12 has a certain rigidity while reducing the weight of the fast-response piezoelectric clamp 1000 used in the wire bonding machine, and can also reduce vibration. It is understood that in some other embodiments, the number and shape of the second hollow portion 123 may be different, and the second hollow portion 123 may also penetrate the second wire clamping arm 12.

[0048] For the aforementioned displacement amplification section 13, please refer to [link / reference needed]. Figure 2 The displacement amplification section 13 is provided with a first hinge end 131, a second hinge end 132, and an abutting center end 133. The first ends of the first hinge end 131 and the second hinge end 132 are respectively provided at both ends of the abutting center end 133, and the first hinge end 131 and the second hinge end 132 have the same orientation. The second end of the first hinge end 131 is connected to the first clamping arm 11, specifically, the second end of the first hinge end 131 is connected to the first cone portion 111 of the first clamping arm 11. The second end of the second hinge end 132 is connected to the second clamping arm 12, specifically, the second end of the second hinge end 132 is connected to the second cone portion 121 of the second clamping arm 12. When the abutting center end 133 is not under force, if the displacement magnification section 13 is observed with the naked eye, the first hinge end 131 and the abutting center end 133 are approximately perpendicular, and the second hinge end 132 and the abutting center end 133 are approximately perpendicular, but the first hinge end 131 and the second hinge end 132 are not parallel, and the angle between the extension lines of the first hinge end 131 and the second hinge end 132 is an acute angle. When the abutting center end 133 is subjected to a force from the connecting end of the first clamping arm 11 toward the clamping end, the angle between the extension lines of the first hinge end 131 and the second hinge end 132 increases, that is, the distance between the clamping end of the first hinge end 131 and the clamping end of the second hinge end 132 increases, thus opening the first clamping arm 11 and the second clamping arm 12.

[0049] The fast-response piezoelectric clamp 1000 used in wire bonding machines also includes a first clamping plate 4 and a second clamping plate 5. (See attached image.) Figure 3 and Figure 4 The first clamping piece 4 is disposed at the clamping end of the first clamping arm 11, and the first clamping piece 4 is located on the surface of the first clamping arm 11 facing the second clamping arm 12. The second clamping piece 5 is disposed at the clamping end of the second clamping arm 12, and the second clamping piece 5 is located on the surface of the second clamping arm 12 facing the first clamping arm 11. The first clamping piece 4 and the second clamping piece 5 are arranged opposite to each other. In this embodiment, the first clamping piece 4 and the second clamping piece 5 are made of sapphire. The shapes of the first clamping piece 4 and the second clamping piece 5 are approximately square plates, and the edges of the opposite surfaces of the first clamping piece 4 and the second clamping piece 5 are rounded to avoid damage to the object to be clamped by sharp edges. It is understood that in some other embodiments, the materials of the first clamping piece 4 and the second clamping piece 5 can be other materials with high hardness, high melting point, low thermal conductivity and low coefficient of expansion, such as zirconium oxide, etc. The shapes of the first clamping piece 4 and the second clamping piece 5 can be adjusted according to actual needs.

[0050] In this embodiment, please continue to refer to Figure 3 and Figure 4The first wire clamping arm 11 is further provided with a first wire clamping plate fixing surface 114, and the second wire clamping arm 12 is further provided with a second wire clamping plate fixing surface 124. Specifically, the wire clamping end of the first wire clamping arm 11 facing the second wire clamping arm 12 is provided with the first wire clamping plate fixing surface 114, and the first wire clamping plate 4 is fixed to the first wire clamping plate fixing surface 114, while the first wire clamping plate 4 protrudes from the surface of the first wire clamping arm 11 facing the second wire clamping arm 12. The wire clamping end of the second wire clamping arm 12 facing the surface of the first wire clamping arm 11 is provided with the second wire clamping plate fixing surface 124, and the second wire clamping plate 5 is fixed to the second wire clamping plate fixing surface 124, and the second wire clamping plate 5 protrudes from the surface of the second wire clamping arm 12 facing the first wire clamping arm 11. It should be noted that in some other embodiments, it is not necessary to simultaneously provide the first wire clamping plate fixing surface 114 and the second wire clamping plate fixing surface 124. The first wire clamping plate fixing surface 114 and the second wire clamping plate fixing surface 124 can be selectively provided as needed. For example, only the first wire clamping plate fixing surface 114 or only the second wire clamping plate fixing surface 124 can be provided. The first wire clamping plate 4 can be fixed to the first wire clamping arm 11 by gluing, snap-fitting, screwing, etc., and the second wire clamping plate 5 can be fixed to the second wire clamping arm 12 by gluing, snap-fitting, screwing, etc. The fixing methods of the first wire clamping plate 4 and the second wire clamping plate 5 can be the same or different.

[0051] The fast-response piezoelectric clamp 1000 used in wire bonding machines also includes a positioning assembly 6, please refer to [link / reference]. Figure 4 and Figure 5 The positioning component 6 includes a connector 61 and a guide post 62. One end of the connector 61 is located at the clamping end of the second clamping arm 12, and the guide post 62 is connected to the other end of the connector 61. The guide post 62 has a guide hole 621. Along the direction from the guide post 62 to the connector 61, the projection of the guide hole 621 is located between the first clamping piece 4 and the second clamping piece 5. In this embodiment, the guide post 62 is cylindrical, the guide hole 621 is concentric with the guide post 62, and the guide post 62 is made of ruby. The connector 61 has a connection hole (not shown), and the outer edge of the guide post 62 is connected to the connection hole of the connector 61. The connection method between the guide post 62 and the connector 61 can be adhesive bonding, snap-fitting, etc. It is understood that in some other embodiments, the shape of the guide post 62 is not disc-shaped, but can be elliptical, rounded rectangle, etc. The material of the guide post can also be other materials with high hardness, high melting point, low thermal conductivity, and low coefficient of expansion, such as zirconium oxide. The shape of the connector 61 can be adapted to its function. The connection method between the connector 61 and the second clamping arm 12 can be integral molding, hinge, screw connection, snap connection, welding, etc.

[0052] For the piezoelectric ceramic component 2 mentioned above, please refer to... Figure 5The piezoelectric ceramic component 2 is roughly rectangular in shape and is installed in the assembly cavity 144. One end of the piezoelectric ceramic component 2 abuts against the abutment center end 133 of the displacement amplification part 13. Wires are connected to both sides of the piezoelectric ceramic component 2 to provide excitation voltage. Under the action of the excitation voltage, the piezoelectric ceramic component 2 deforms using the inverse piezoelectric effect. The deformation is further transmitted to the first clamping arm 11 and the second clamping arm 12 through the compression displacement amplification part 13. In this embodiment, the piezoelectric ceramic component 2 is constructed using a multi-layer piezoelectric ceramic stack. Some piezoelectric ceramics are used to generate deformation using the inverse piezoelectric effect, while others are used as spares. That is, when some piezoelectric ceramics experience fatigue wear, only the spare piezoelectric ceramics need to be connected; there is no need to replace the entire piezoelectric ceramic component 2 or adjust the preload. It is understood that in some other embodiments, the piezoelectric ceramic component 2 is a single piece without a spare option. If damage occurs, the entire piezoelectric ceramic component 2 is replaced, and the preload of the clamp body 1 is readjusted.

[0053] For the pretensioning component 3 mentioned above, please refer to Figures 3 to 5 The pre-tightening assembly 3 includes a clamping member 33 and a first bolt 31. The first bolt 31 is screwed into the threaded through hole 145. The clamping member 33 is housed in the assembly cavity 144. One side of the clamping member 33 abuts against the piezoelectric ceramic component 2, and the other side of the clamping member 33 is connected to the first bolt 31. In this embodiment, the two ends of the clamping member 33 are respectively fixedly connected to the first seat wall 141 and the second seat wall 142 of the seat body 14. The clamping member 33 and the displacement amplification part 13 of the seat body 14 are arranged opposite to each other. The distance between the opposing surfaces of the clamping member 33 and the displacement amplification part 13 is slightly less than the length of the piezoelectric ceramic component 2 in this direction. Even without adjusting the distance between the clamping member 33 and the displacement amplification part 13 using the first bolt 31, the piezoelectric ceramic component 2 still has a certain pre-tightening force. At this time, the pre-tightening force is small, but it can keep the piezoelectric ceramic component 2 between the clamping member 33 and the displacement amplification part 13. The first bolt 31 can apply a preload force to the clamping member 33 from the connecting end of the first clamping arm 11 toward the clamping end. The magnitude of the preload force can be adjusted by adjusting the position of the first bolt 31. The clamping member 33 can also prevent direct contact between the piezoelectric ceramic component 2 and the first bolt 31, avoiding damage caused by excessive stress. In some other embodiments, the clamping member 33 can be movable relative to the first seat wall 141 and the second seat wall 142 of the first seat body 14, and the shape of the clamping member 33 can be circular, etc.

[0054] The aforementioned pre-tightening assembly 3 also includes a second bolt 32. In this case, the first bolt 31 is partially screwed into the end of the threaded through hole 145 facing the assembly cavity 144, and the second bolt 32 is screwed into the end of the threaded through hole 145 facing away from the assembly cavity 144. The second bolt 32 abuts against the first bolt 31 to keep the position of the first bolt 31 unchanged, providing a more reliable pre-tightening force. That is, it ensures that the fast-response piezoelectric clamp 1000 applied to the wire bonding machine will not experience a change in pre-tightening force due to the loosening of the first bolt 31 when working at high frequency.

[0055] It is understood that in some other embodiments, the displacement amplification part 13 and the clamping member 33 may also be provided with a slot to accommodate the piezoelectric ceramic part 2, which can maintain the position of the piezoelectric ceramic part 2. The clamping member 33 may also not be fixedly connected to the base 14, but may be movably connected to the base 14, making the installation of the piezoelectric ceramic part 2 more convenient.

[0056] It is worth noting that the structure formed by the first clamping arm 11, the second clamping arm 12, and the base 14 in the clamp body 1 is similar to tweezers. The displacement amplification part 13 in the clamp body 1 has the function of amplifying the deformation of the piezoelectric ceramic component 2. The greater the length of the first clamping arm 11 and the second clamping arm 12 in the direction from the connecting end of the first clamping arm 11 toward the clamping end, the greater the influence of the deformation of the piezoelectric ceramic component 2 on the clamping end of the first clamping arm 11 and the clamping end of the second clamping arm 12.

[0057] The aforementioned fast-response piezoelectric clamp 1000 used in wire bonding machines also includes a control circuit board (not shown). The control circuit board is encapsulated within the clamp body 1. The piezoelectric ceramic component 2 is electrically connected to the control circuit board. The control circuit board also includes a power supply module, a microprocessor, a signal amplification module, a memory, and a communication module. The power supply module supplies power to the control circuit board. The microprocessor is connected to the signal amplification module, the memory, and the communication module. The memory stores signals. The signal amplification module amplifies the signals and outputs them to the piezoelectric ceramic component, causing it to move. The communication module interacts with the user, including user-inputted instructions and feedback instructions. An Extra-Insensitive Input Shaping (EI) algorithm is stored in the memory. When the fast-response piezoelectric clamp 1000 is working, the microprocessor reads the algorithm program stored in the memory, shapes the user-inputted instructions received by the communication module into an electrical excitation signal, amplifies the electrical excitation signal into an excitation voltage through the signal amplification module, and then inputs the excitation voltage to the piezoelectric ceramic component 2 to cause it to move. In some embodiments, the signal amplification module includes a negative feedback amplification circuit, which can be used to provide feedback on the output curve and ensure the stability of the circuit under high dynamic conditions. It is understood that the control circuit board is not mounted on the clamp body 1; the control circuit board can be mounted on other external devices, and the control circuit board can be reprogrammed.

[0058] The essence of the EI input shaping algorithm is to combine the vibration frequency characteristics and attenuation amplitude parameters of the clamp body 1 to decompose the input signal into a multi-pulse set, solve the amplitude and generation time of each pulse, and then input the pulse signal into the signal amplification module to further control the piezoelectric ceramic component 2 to actuate and squeeze the displacement amplification part 13 of the clamp body 1, thereby suppressing the vibration of the first clamping arm 11 and the second clamping arm 12.

[0059] When performing vibration system analysis, the fast-response piezoelectric clamp 1000 applied to a wire bonding machine according to the embodiments of this application can be approximated as a second-order system. The dynamic equation of the fast-response piezoelectric clamp 1000 applied to the wire bonding machine is as follows:

[0060] y(t)+2εW n y(t)+W n 2 y(t)=W n 2 u(t)

[0061] Among them, w nε is the undamped natural resonant frequency of the clamp body 1, ε is the damping ratio of the clamp body 1, u(t) is the input signal of the fast-response piezoelectric clamp 1000 applied to the wire bonding machine, and y(t) is the output signal of the fast-response piezoelectric clamp 1000 applied to the wire bonding machine.

[0062] In this embodiment, the fast-response piezoelectric wire clamp 1000 applied to a wire bonding machine includes a clamp body 1, a piezoelectric ceramic component 2, a pre-tightening assembly 3, and a control circuit board. The wire clamp body 1 includes a first clamping arm 11, a second clamping arm 12, a displacement amplification part 13, and a base 14. The base 14 is provided with an assembly cavity 144. The connecting ends of the first clamping arm 11 and the second clamping arm 12 are both connected to the base 14, and the first clamping arm 11 and the second clamping arm 12 are arranged opposite to each other. The two ends of the displacement amplification part 13 are respectively connected to the connecting ends of the first clamping arm 11 and the second clamping arm 12. A piezoelectric ceramic component 2 is disposed in the assembly cavity 144. One end of the piezoelectric ceramic component 2 abuts against the displacement amplification part 13. The piezoelectric ceramic component 2 is used to drive the clamping ends of the first clamping arm 11 and the clamping ends of the second clamping arm 12 to move towards or away from each other. A pre-tightening component 3 is disposed in the wire clamp body 1 and abuts against the other end of the piezoelectric ceramic component 2. The pre-tightening component 3 is used to adjust the pre-tightening force applied to the piezoelectric ceramic component 2. A control circuit board is encapsulated in the wire clamp body 1, and the piezoelectric ceramic component 2 is electrically connected to the control circuit board. By incorporating an EI input shaping algorithm into the control circuit board, the response time of the wire clamp body 1 using the piezoelectric ceramic component 2 is shortened, while the oscillation of the wire clamp body is reduced.

[0063] This application also provides a method for controlling the aforementioned fast-response piezoelectric clamp 1000 used in a wire bonding machine. Please refer to [link to relevant documentation]. Figure 6 The method includes:

[0064] Step S100: Receive control command;

[0065] Control commands are instructions input by the user, such as when the user sends control commands to the communication module through a terminal device.

[0066] Step S110: Determine whether the control command is a wire release command or a wire clamping command;

[0067] Step S120: If the control command is a wire loosening command, then control the piezoelectric ceramic part 9 to compress the displacement amplification part 13 so that the distance between the first wire clamping arm 11 and the second wire clamping arm 12 increases.

[0068] When the distance between the first clamping arm 11 and the second clamping arm 12 increases, the first clamping arm 11 and the second clamping arm 12 are in a loosened state. In some embodiments, the distance between the first clamping arm 11 and the second clamping arm 12 corresponding to the loosening command can be set, for example, set to a first distance, and when the loosening command is received, the distance between the first clamping arm 11 and the second clamping arm 12 is adjusted to the first distance;

[0069] Step S130: If the control command is a wire clamping command, then control the piezoelectric ceramic component 9 to reduce the extrusion displacement amplification part 13 so that the distance between the first wire clamping arm 11 and the second wire clamping arm 12 becomes smaller.

[0070] When the distance between the first clamping arm 11 and the second clamping arm 12 decreases, the first clamping arm 11 and the second clamping arm 12 are clamped together. In some embodiments, the distance between the first clamping arm 11 and the second clamping arm 12 corresponding to the clamping command can be set, for example, to a second distance. When a clamping command is received, the distance between the first clamping arm 11 and the second clamping arm 12 is adjusted to the second distance, wherein the first distance is greater than the second distance.

[0071] To help readers understand the workflow of using the Quick Response Piezoelectric Clip 1000 applied to wire bonding machines, the following describes the process of clamping, releasing, and replacing the metal wire using the Quick Response Piezoelectric Clip 1000 applied to wire bonding machines.

[0072] Working process for clamping metal wire:

[0073] S11: Place the metal wire between the first clamping arm 11 and the second clamping arm 12;

[0074] S12: The user sends a clamping command to the control circuit board;

[0075] S13: According to the wire clamping command, the control circuit board drives the piezoelectric ceramic component 9 to reduce the pressure on the hinge part 13, so that the distance between the first wire clamping arm 11 and the second wire clamping arm 12 becomes smaller, thus clamping the metal wire.

[0076] Workflow for loosening the metal wire:

[0077] S21: The user sends a loose wire command to the control circuit board;

[0078] S22: According to the wire release command, the control circuit board drives the piezoelectric ceramic part 9 to press the hinge part 13, so that the distance between the first wire clamping arm 11 and the second wire clamping arm 12 increases.

[0079] S23: Take the metal wire out from between the first clamping arm 11 and the second clamping arm 12.

[0080] Workflow for replacing the metal wire:

[0081] S31: The user sends a loose wire command to the control circuit board;

[0082] S32: According to the wire release command, the control circuit board drives the piezoelectric ceramic part 9 to press the hinge part 13, so that the distance between the first wire clamping arm 11 and the second wire clamping arm 12 increases.

[0083] S33: Remove the old metal wire from between the first clamping arm 11 and the second clamping arm 12, and install the new metal wire between the first clamping arm 11 and the second clamping arm 12.

[0084] S34: The user sends a wire clamping command to the control circuit board. According to the wire clamping command, the control circuit board drives the piezoelectric ceramic component 9 to reduce the pressure on the hinge part 13, so that the distance between the first wire clamping arm 11 and the second wire clamping arm 12 becomes smaller, and the metal wire is clamped.

[0085] It should be noted that while the preferred embodiments of the present invention are given in the specification and accompanying drawings, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of the present invention; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of the present invention specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A fast-response piezoelectric clamp for use in a wire bonding machine, characterized in that, include: The wire clamp body includes a first wire clamping arm, a second wire clamping arm, a displacement amplification part, and a base. The base is provided with an assembly cavity. The connecting ends of the first wire clamping arm and the second wire clamping arm are both connected to the base, and the first wire clamping arm and the second wire clamping arm are arranged opposite to each other. The two ends of the displacement amplification part are respectively connected to the connecting ends of the first wire clamping arm and the second wire clamping arm. The first wire clamping arm is provided with a first hollow part, and the second wire clamping arm is provided with a second hollow part. The displacement amplification section includes a first hinge end, a second hinge end, and an abutting center end. The first ends of the first hinge end and the second hinge end are respectively disposed at the two ends of the abutting center end, and the first hinge end and the second hinge end have the same orientation. The second end of the first hinge end is connected to the first clamping arm, and the second end of the second hinge end is connected to the second clamping arm. The angle between the extension lines of the first hinge end and the second hinge end is an acute angle. A piezoelectric ceramic component is disposed in the assembly cavity. One end of the piezoelectric ceramic component abuts against the displacement amplification part, and one side of the component abuts against the center end abuts against the piezoelectric ceramic component. The piezoelectric ceramic component is used to drive the clamping ends of the first clamping arm and the clamping ends of the second clamping arm to move towards or away from each other. A pre-tightening component is disposed on the wire clamp body, the pre-tightening component abuts against the other end of the piezoelectric ceramic component, and the pre-tightening component is used to adjust the pre-tightening force applied to the piezoelectric ceramic component; The base body is also provided with a threaded through hole, which connects to the assembly cavity; The pre-tightening assembly includes a clamping member, a first bolt, and a second bolt. The first bolt is screwed into the end of the threaded through hole facing the assembly cavity. The clamping member is located in the assembly cavity. The clamping member and the displacement amplification part of the seat are arranged opposite to each other. The distance between the opposite surfaces of the clamping member and the displacement amplification part is slightly less than the length of the piezoelectric ceramic component. The clamping member is movably connected to the seat. One side of the clamping member abuts against the piezoelectric ceramic component, and the other side of the clamping member is connected to the first bolt. The second bolt is screwed into the end of the threaded through hole facing away from the assembly cavity, and the second bolt abuts against the first bolt. The displacement amplification part and the clamping member are also provided with a slot for accommodating the piezoelectric ceramic component. The base includes a first base wall, a second base wall, a third base wall, and two wire grooves. The displacement amplification part, the first base wall, the second base wall, and the third base wall enclose the assembly cavity. The two wire grooves are respectively disposed on the side of the third base wall near the first base wall and the side of the third base wall near the second base wall, and the wire grooves are disposed on the same surface of the base. The wire grooves are used for the routing of wires connected to the piezoelectric ceramic component.

2. The fast-response piezoelectric clamp for use in a wire bonding machine according to claim 1, characterized in that, The fast-response piezoelectric clamp used in the wire bonding machine also includes a first clamping plate and a second clamping plate; The first wire clamping piece is disposed at the wire clamping end of the first wire clamping arm, and the first wire clamping piece is located on the surface of the first wire clamping arm facing the second wire clamping arm; The second wire clamping piece is disposed at the wire clamping end of the second wire clamping arm, and the second wire clamping piece is located on the surface of the second wire clamping arm facing the first wire clamping arm, and the first wire clamping piece and the second wire clamping piece are disposed opposite to each other.

3. The fast-response piezoelectric clamp for use in a wire bonding machine according to claim 2, characterized in that, The clamping end of the first clamping arm facing the second clamping arm is provided with a first clamping piece fixing surface. The first clamping piece is fixed to the first clamping piece fixing surface, and the first clamping piece protrudes from the surface of the first clamping arm facing the second clamping arm. And / or, The clamping end of the second clamping arm facing the first clamping arm is provided with a second clamping piece fixing surface. The second clamping piece is fixed to the second clamping piece fixing surface, and the second clamping piece protrudes from the surface of the second clamping arm facing the first clamping arm.

4. The fast-response piezoelectric clamp for use in a wire bonding machine according to claim 2, characterized in that, The fast-response piezoelectric clamp applied to the wire bonding machine also includes a positioning component, which includes a connector and a guide post. One end of the connector is disposed at the clamping end of the second clamping arm, and the guide post is connected to the other end of the connector. The guide post is provided with a guide hole. Along the direction from the guide post to the connector, the projection of the guide hole is located between the first clamping plate and the second clamping plate.

5. The fast-response piezoelectric clamp for use in a wire bonding machine according to claim 1, characterized in that, The first bolt is screwed into the end of the threaded through hole facing the assembly cavity, and the second bolt is screwed into the end of the threaded through hole facing away from the assembly cavity, with the second bolt abutting against the first bolt.

6. The fast-response piezoelectric clamp for use in a wire bonding machine according to claim 1, characterized in that, The piezoelectric ceramic component is composed of multiple layers of piezoelectric ceramic stacks, in which some or all of the piezoelectric ceramics are used to generate deformation.

7. The fast-response piezoelectric clamp for use in a wire bonding machine according to any one of claims 1-6, characterized in that, The fast-response piezoelectric wire clamp used in the wire bonding machine also includes a control circuit board, which is encapsulated in the clamp body, and the piezoelectric ceramic component is electrically connected to the control circuit board. The control circuit board also includes a power supply module, a microprocessor, a signal amplification module, a memory, and a communication module. The power supply module is used to supply power to the control circuit board. The microprocessor is connected to the signal amplification module, the memory, and the communication module. The memory is used to store historical signals. The signal amplification module outputs voltage to the piezoelectric ceramic component, causing the piezoelectric ceramic component to actuate.

8. A method for controlling a fast-response piezoelectric clamp applied to a wire bonding machine as described in any one of claims 1-7, the method comprising: Receive control commands; Determine whether the control command is a wire release command or a wire clamping command; If the control command is a wire release command, then the piezoelectric ceramic component is controlled to compress the displacement amplification section so that the gap between the first wire clamping arm and the second wire clamping arm becomes larger. If the control command is a wire clamping command, then the piezoelectric ceramic component is controlled to reduce the extrusion displacement amplification portion, so that the gap between the first wire clamping arm and the second wire clamping arm becomes smaller.

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