CN114952131A - Bond head with contactless bond wire displacement detection and related apparatus and method - Google Patents
Bond head with contactless bond wire displacement detection and related apparatus and method Download PDFInfo
- Publication number
- CN114952131A CN114952131A CN202210524685.4A CN202210524685A CN114952131A CN 114952131 A CN114952131 A CN 114952131A CN 202210524685 A CN202210524685 A CN 202210524685A CN 114952131 A CN114952131 A CN 114952131A
- Authority
- CN
- China
- Prior art keywords
- wire
- welding
- displacement detection
- assembly
- bonding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0252—Steering means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
Abstract
The embodiment of the application belongs to the ultrasonic welding field, relates to a soldered connection with displacement detection of contactless bonding wire, include: the device comprises a fixing ring, a welding assembly, a welding wire clamp assembly and a welding wire displacement detection assembly; the welding assembly and the wire clamp fixing arm are fixed on the fixing ring; the welding wire displacement detection assembly is fixed on the wire clamp fixing arm and comprises a guide wire fixing seat, a wire passing glass tube, an optical lens assembly, a light source and an optical sensor; the welding wire displacement detection assembly detects the displacement of the welding wire section in the guide wire fixing seat in real time in a non-contact mode. The application also relates to a welding device and a welding wire displacement detection method. The scheme that this application provided carries out contactless displacement detection at the welding position near-end through bonding wire displacement detection subassembly, and the cooperation is crossed a glass pipe and is reduced bonding wire movement resistance, reduces the error that the bonding wire buckled and produces, promotes the accuracy and the reliability that the real-time displacement of bonding wire detected.
Description
Technical Field
The present disclosure relates to the field of ultrasonic welding technologies, and more particularly, to a welding head, a welding device, and a method for detecting displacement of a welding wire.
Background
In the field of welding, welding equipment often uses a weld wire, such as an aluminum wire, for welding. When the welding wire is paid off in the welding process, the displacement of the welding wire needs to be detected, the existing welding wire displacement detection mainly adopts a contact type welding wire displacement detection structure, the structure has the problems of wire paying off resistance, insufficient welding, unstable wire arc, wire scraping and the like, and meanwhile, the welding wire is soft and is easy to bend in the wire paying off process, so that the detection precision of the welding wire displacement detection structure has larger error; and contact parts in the contact type detection mechanism are easy to wear and need to be replaced regularly, so that the equipment maintenance cost is high. How to improve the detection precision of the displacement of the welding wire and reduce the maintenance cost of the equipment is a problem to be solved by the technical personnel in the field.
Disclosure of Invention
In view of this, the embodiment of the present application provides a welding head with contactless bonding wire displacement detection, which solves the technical problems in the prior art that detection has a large error, resulting in low detection precision, and equipment is easily worn, resulting in high maintenance cost. On the basis, the welding equipment and the welding wire displacement detection method are also provided.
In order to solve the above technical problem, an embodiment of the present application provides a welding head with contactless weld line displacement detection, which adopts the following technical scheme:
a bonding head with contactless wire displacement detection, comprising: the device comprises a fixing ring, a welding assembly, a welding wire clamp assembly and a welding wire displacement detection assembly;
the welding assembly is fixed on the fixing ring;
the welding wire clamp assembly comprises a clamp fixing arm, a movable arm, a clamp clamping jaw and a wire guide groove; the wire clamp fixing arm is fixed on the fixing ring, the movable arm is connected to the wire clamp fixing arm, the wire clamp clamping jaws are respectively arranged at the tail ends of the wire clamp fixing arm and the movable arm, and the wire clamp clamping jaws are clamped with the wire guide groove;
the welding wire displacement detection assembly comprises a guide wire fixing seat, a glass tube for passing wires, an optical lens assembly, a light source and an optical sensor, wherein the guide wire fixing seat is fixed on the wire clamp fixing arm;
the welding wire sequentially penetrates through the wire glass tube, the guide wire fixing seat and the wire guide groove, and the welding wire displacement detection assembly carries out non-contact displacement detection on the welding wire section in the guide wire fixing seat.
Further, the optical lens assembly includes a frame and first and second lenses disposed in the frame;
one side of the mirror bracket is embedded in the guide wire fixing seat, the other side of the mirror bracket is embedded in the circuit board, the light source is opposite to the first lens, the second lens is opposite to the optical sensor, light passing through the first lens is projected to a welding wire in the guide wire fixing seat, and light reflected by the welding wire in the guide wire fixing seat is received by the optical sensor through the second lens.
Furthermore, the optical sensor comprises a CMOS (complementary metal oxide semiconductor) photoreceptor and a digital signal processor, light of the light source is projected on a welding line at the lower end of the outlet of the wire glass tube through the first lens, reflected light of the welding line is projected on the CMOS photoreceptor through the second lens, so that continuous image frame collection of the welding line is realized, and the digital signal processor compares adjacent image frames to realize detection of displacement of the welding line.
Furthermore, the circuit board is further provided with an output terminal connected with external equipment, and the output terminal is positioned on one side of the circuit board far away from the optical lens assembly.
Further, the welding subassembly includes transducer, welding steel nozzle and transducer seat, the transducer passes through the transducer seat is fixed in gu fixed ring, cross a glass pipe with the welding steel nozzle all passes the transducer sets up, passes the front end of the bonding wire of metallic channel is just right the welding position of welding steel nozzle.
Further, the guide wire fixing seat comprises a through hole parallel to the welding steel nozzle and a counter bore perpendicular to the through hole and communicated with the through hole, the glass fiber passing tube is partially embedded in the through hole, and the second lens is opposite to the counter bore.
Furthermore, the movable arm is connected to the wire clamp fixing arm through a wire clamp elastic sheet.
In order to solve the above technical problem, an embodiment of the present application further provides a welding device, which adopts the following technical scheme:
a welding apparatus comprising a welding head as described above with contactless wire displacement detection.
In order to solve the above technical problem, an embodiment of the present application further provides a method for detecting displacement of a bonding wire, which adopts the following technical solutions:
a method for detecting displacement of a bonding wire is applied to the bonding head or the bonding equipment with the contactless bonding wire displacement detection, and the method comprises the following steps:
enabling the welding wire to move to a welding position along a movement path formed by connecting the glass tube with the wire, the wire guide fixing seat and the wire guide groove according to a preset welding wire movement speed;
and projecting the light source on a welding wire at the lower end of the outlet of the wire glass tube through the optical lens assembly, enabling the reflected light of the welding wire to pass through the optical lens assembly to be collected by the optical sensor, realizing continuous image frame collection of the welding wire through the optical sensor, performing noise elimination and analysis on the collected continuous image frames to obtain welding wire displacement information, and outputting the welding wire displacement information to external computer equipment so that the computer equipment generates control information of the movement speed of the welding wire according to the welding wire displacement information.
Further, the projecting the light source on the welding line at the lower end of the outlet of the wire glass tube through the optical lens assembly, enabling the reflected light of the welding line to pass through the optical lens assembly and be collected by the optical sensor, realizing the collection of continuous image frames on the welding line through the optical sensor, and performing noise elimination and analysis on the collected continuous image frames to obtain the displacement information of the welding line specifically comprises:
and the light source is projected on a welding wire at the lower end of the outlet of the wire glass tube through a first lens in the optical lens assembly, reflected light of the welding wire passes through a second lens in the optical lens assembly and is collected by a CMOS (complementary metal oxide semiconductor) photoreceptor in the optical sensor, continuous image frame collection is realized on the welding wire through a digital signal processor in the optical sensor, and meanwhile, the digital signal processor is used for removing noise and analyzing the collected continuous image frames to obtain welding wire displacement information. A method for detecting displacement of a bonding wire comprises the following steps:
starting welding equipment to enable the welding wire to move to a welding position along a motion path formed by the wire glass tube, the guide wire fixing seat and the guide wire groove according to the welding speed;
and performing displacement detection on the welding wire positioned at the guide wire fixing seat through the welding wire displacement detection assembly, obtaining welding wire displacement data according to the detection data, and sending the welding wire displacement data to connected computer equipment so that the computer equipment generates control information of welding wire displacement according to the welding wire displacement data.
Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:
the application provides a technical scheme carries out contactless displacement detection through the bonding wire displacement detection subassembly to the bonding wire of welding position near-end, and the cooperation is crossed a silk glass pipe and has been reduced bonding wire movement resistance, has reduced the error that the bonding wire buckled and produces, has promoted the accuracy and the reliability that the real-time displacement of bonding wire detected.
Drawings
In order to make the description of the embodiments more clear, a brief description of the drawings that are needed in the description of the embodiments is given below, it being clear that the drawings in the description that follows are some embodiments of the application, from which other drawings can be derived by a person skilled in the art without inventive effort.
FIG. 1 is a schematic structural diagram of a welding head provided in an embodiment of the present application;
FIG. 2 is a schematic view of the wire displacement detection assembly of the bond head of FIG. 1 at an angle after explosion;
FIG. 3 is a schematic view of the wire displacement detection assembly of the bond head of FIG. 1 at another angle after explosion;
FIG. 4 is an enlarged schematic view of A in FIG. 3;
FIG. 5 is a schematic view of the weld head of FIG. 1 with parts removed;
FIG. 6 is a schematic view of another angle of FIG. 5;
fig. 7 is a flowchart of a wire displacement detection method according to an embodiment of the present application.
Description of the drawings:
a-a bonding wire; 10-a fixed ring; 20-a wire bonding assembly; 21-a transducer; 22-welding a steel nozzle; 23-a transducer mount; 30-a wire clamp assembly; 31-a wire clamp securing arm; 32-a movable arm; 33 a-a first jaw; 33 b-a second jaw; 34-a wire guide groove; 35-a wire clip spring plate; 40-a wire bond displacement detection assembly; 41-guide wire fixing seat; 41 a-through hole; 41 b-a counter bore; 42-passing through a glass tube; 43-an optical lens assembly; 43 a-frame; 43 b-a first lens; 43 c-a second lens; 44-a light source; 45-an optical sensor; 46-a circuit board; 47-output terminal;
Detailed Description
Unless defined otherwise, 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 of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1, the present application provides a welding head, which includes: a retaining ring 10, a welding assembly 20, a wire clamp assembly 30, and a wire displacement detection assembly 40; the retaining ring 10 is used to directly or indirectly retain the weld assembly 20, the wire clamp assembly 30 and the wire displacement sensing assembly 40.
In the present embodiment, as shown in fig. 2 and 3, the welding unit 20 is fixed to the fixing ring 10; the welding assembly 20 comprises a transducer 21, a welding steel nozzle 22 and a transducer seat 23, wherein the transducer 21 is fixed on the fixing ring 10 through the transducer seat 23, the welding steel nozzle 22 penetrates through the transducer 21, and the front end of a welding wire a penetrating through the wire guide groove 34 is aligned to the welding position of the welding steel nozzle 22. The transducer 21 is used for energy conversion, such as converting ultrasonic energy into heat energy, and the welding tip 22 is used for transferring the energy converted by the transducer 21 to perform a welding operation on a product to be welded.
In the present embodiment, as shown in fig. 2-6, the wire clamp assembly 30 includes a clamp securing arm 31, a moveable arm 32, clamp jaws (first jaw 33a and second jaw 33b), and a wire guide 34; the fastener fixed arm 31 is fixed in gu fixed ring 10, the digging arm 32 connect in the fixed arm, the fastener fixed arm with the end of digging arm respectively is provided with one the fastener clamping jaw, specifically the bonding wire clamp subassembly 30 is connected with first clamping jaw 33a, the digging arm 32 is connected with second clamping jaw 33b, first clamping jaw 33a and second clamping jaw 33b with metallic channel 34 joint.
In some embodiments, the movable arm 32 is connected to the wire clamp fixing arm 31 through the wire clamp elastic sheet 35, the movable arm 32 is elastically movable through elasticity of the wire clamp elastic sheet 35, and when the first clamping jaw 33a and the second clamping jaw 33b are simultaneously inserted into the wire guide groove 34, the wire clamp elastic sheet 35 is elastically deformed, so that the first clamping jaw 33a and the second clamping jaw 33b tend to move away from each other, and can be clamped in the wire guide groove 34.
In a further embodiment, referring to fig. 5 and 6, the wire guide groove 34 further includes a locking portion, and after the first clamping jaw 33a and the second clamping jaw 33b are inserted into the notch of the wire guide groove 34, the first clamping jaw 33a is engaged with the locking portion to further achieve locking.
In the embodiment, the wire displacement detecting assembly 40 is fixed to the wire clamp fixing arm 31, and the wire displacement detecting assembly 40 can detect the displacement of the wire a in real time without contact by using screws, and the specific detecting process is described in detail below with reference to the specific structure of the wire displacement detecting assembly 40. In some embodiments, referring back to fig. 2-6, the wire displacement detecting assembly 40 includes a wire holder 41, a glass tube 42, an optical lens assembly 43, a light source 44, and an optical sensor 45; the guide wire fixing seat 41 is fixed on the wire clamp fixing arm 31, the wire glass tube 42 penetrates through the guide wire fixing seat 41, the light source 44 and the optical sensor 45 are arranged on a circuit board 46, and the circuit board 46, the optical lens assembly 43 and the guide wire fixing seat 41 are sequentially connected. In this embodiment, the bonding wire sequentially passes through the glass tube 42, the guide wire fixing seat 41 and the wire guide groove 34, and the bonding wire displacement detecting assembly detects the displacement of the bonding wire segment in the guide wire fixing seat 41 in real time without contact.
In some embodiments, the optical lens assembly 43 is disposed between the guide wire holder 41 and the detection circuit board. Specifically, as shown in fig. 2 and 3, the optical lens assembly 43 includes a lens frame 43a and a first lens 43b and a second lens 43c disposed in the lens frame 43a, one side of the lens frame 43a is embedded in the wire fixing seat 41, the other side of the lens frame 43a is embedded in the circuit board 46, the light source 44 faces the first lens 43b, the second lens 43c faces the optical sensor 45, light emitted from the light source 44 passes through the first lens 43b and is projected onto the bonding wire a in the wire fixing seat 41, the illuminated portion of the bonding wire a is located at the lower end of the outlet of the glass fiber tube and is located in the wire fixing seat 41, and light reflected by the bonding wire a in the wire fixing seat 41 is received and collected by the optical sensor 45 through the second lens 43 c. In a specific embodiment, the first lens 43b and the second lens 43c can be a prism lens and a circular lens, respectively, wherein the light emitted from the light source 44 is projected onto the surface of the bonding wire a through the prism lens to illuminate the bonding wire a, and the circular lens is equivalent to a camera lens which transmits the image of the illuminated surface of the bonding wire a to the small hole at the bottom of the optical sensor 45 to capture image frame data.
In some embodiments, as shown in fig. 5 and 6, the glass fiber tube 42 is disposed parallel to the welding steel nozzle 22 and passes through the transducer 21, which makes the welding head more compact and also facilitates the wire feeding process to avoid bending of the welding wire.
In some embodiments, as shown in fig. 2 to 6, the guide wire fixing seat 41 includes a through hole 41a parallel to the welding steel nozzle, and a counterbore 41b perpendicular to the through hole 41a and communicating with the through hole 41a, where perpendicular means that the axis of the through hole 41a is perpendicular to the axis of the counterbore 41b, the front end of the glass fiber tube 42 is partially inserted into the through hole 41a, thereby achieving the installation and position fixing of the glass fiber tube 42 and the welding wire, fig. 4 shows that the diameter of the front end of the glass fiber tube 42 is larger and matched with the diameter of the through hole 41a, and the diameter of the welding wire a is smaller than the diameters of the glass fiber tube 42 and the through hole 41a, so that the welding wire a can move stably without resistance, thereby avoiding the occurrence of wire scraping, reducing the occurrence of false welding and unstable wire arc, the second lens faces the counterbore 41b, and the welding wire a penetrating out of the wire glass tube 42 can be observed through the counterbore 41 b. The glass tube 42, the guide wire fixing seat 41 and the wire guide groove 34 form a movement path of a welding wire a, and with reference to fig. 4 to 6, the front end of the welding wire a passes through the glass tube 42, the guide wire fixing seat 41 and the wire guide groove 34 in sequence, and reaches a welding position after passing through the wire guide groove 34. In some embodiments, the wire holder 41 may be configured as a recessed structure (as shown in fig. 3), the optical lens assembly 43 is embedded in the recessed structure (as shown in fig. 1), and the circuit board 46 is connected to the wire holder 41 by screws, so as to fix the wire displacement detecting assembly 40.
In a further embodiment, the detection circuit board 46 further comprises an output terminal 47 for connecting an external device, and the output terminal 47 is located on a side of the circuit board 46 away from the optical lens assembly 43. The output terminal 47 can be externally connected with a computer device, and the data collected by the optical sensor 45 can be transmitted to the computer device through the output terminal 47 for processing, so as to obtain the displacement of the current bonding wire a.
The bonding wire a according to the above embodiments of the present application may specifically be an aluminum wire or other wire material that can be used for bonding. The welding head of the embodiment can be applied to various welding devices or welding related structures, such as semiconductor packaging devices, ultrasonic welding wires, paying-off mechanisms, power device welding heads and the like, displacement of welding wires is detected and controlled in real time, if the displacement of the welding wires is detected to be too high, the paying-off speed of the welding wires is reduced, otherwise, the paying-off speed of the welding wires is increased, and therefore the welding quality can be improved.
In this embodiment, the optical sensor 45 includes a CMOS photoreceptor and a digital signal processor, light from the light source 44 is projected onto the bonding wires in the wire glass tube 42 through the first lens 43b, reflected light from the bonding wires is projected onto the CMOS photoreceptor through the second lens 43c, so as to realize continuous image frame acquisition of the bonding wires, and the digital signal processor compares adjacent image frames to realize detection of displacement of the bonding wires. The principle of detecting the displacement of the bonding wire of the bonding head according to the present invention will be described with reference to fig. 1 to 6. Specifically, the two parts of the "CMOS photoreceptor" and the "Digital Signal Processor (DSP)" are key structures for image acquisition, the CMOS photoreceptor is a matrix composed of hundreds of photoelectric devices, just like a camera, and is used for shooting a picture of physical displacement of the bonding wire a, the optical sensor 45 amplifies an optical signal received through the second lens 43c and projects the optical signal onto the CMOS matrix to form a frame, then converts the framed image from the optical signal into an electrical signal, and transmits the electrical signal to the DSP for processing, after the DSP performs denoising and analysis on a difference between adjacent frames, bonding wire displacement information is obtained and is transmitted to an external computer device through an output terminal 47 of an interface circuit, and the external computer device can generate control information on the movement speed of the bonding wire a according to the information, so that the bonding wire displacement can be detected and controlled in real time.
The application provides a soldered connection structure carries out contactless displacement detection to the welding position near-end through bonding wire displacement detection subassembly 40, and the cooperation is crossed a silk glass pipe 42 and has been reduced bonding wire a motion resistance, has reduced the error that aluminium silk buckle produced, has promoted bonding wire displacement detection accuracy and reliability.
Embodiments of the present application also provide a welding device, including a welding head with contactless wire displacement detection as described above, which utilizes ultrasonic welding. The welding equipment that this application provided carries out contactless displacement detection at the welding position near-end through bonding wire displacement detection subassembly 40, and the cooperation is crossed a glass pipe 42 and has been reduced bonding wire a motion resistance, has reduced the error that aluminium silk buckle produced, has promoted the accuracy and the reliability that the real-time displacement of bonding wire detected simultaneously.
The embodiment of the present application further provides a method for detecting displacement of a bonding wire, as shown in fig. 7, the method includes:
s101, enabling the welding wire to move to a welding position along a movement path formed by connecting the wire glass tube, the wire guide fixing seat and the wire guide groove according to a preset welding wire movement speed;
s102, projecting the light source on a welding line at the lower end of the outlet of the wire glass tube through the optical lens assembly, enabling the reflected light of the welding line to pass through the optical lens assembly to be collected by the optical sensor, realizing continuous image frame collection of the welding line through the optical sensor, conducting denoising and analysis on the collected continuous image frames to obtain welding line displacement information, and outputting the welding line displacement information to displacement detection external computer equipment so that the computer equipment can generate control information of the movement speed of the welding line according to the welding line displacement information.
The above steps are described with reference to the welding head provided in fig. 1 to 6, and step S102 specifically includes: the light source 44 is projected on the welding wire at the lower end of the outlet of the wire glass tube through the first lens 43b in the optical lens assembly 43, the reflected light of the welding wire passes through the second lens 43c in the optical lens assembly 43 and is collected by the CMOS photoreceptor in the optical sensor, the digital signal processor in the optical sensor is used for realizing continuous image frame collection on the welding wire, and the digital signal processor is used for removing noise and analyzing the collected continuous image frames to obtain the displacement information of the welding wire. Specifically, the two parts, i.e., "CMOS photoreceptor" and "Digital Signal Processor (DSP)" are key structures for image acquisition, and when the step of performing displacement detection on the bonding wire a located at the wire guide fixing seat 41 by the bonding wire displacement detection assembly 40 and obtaining bonding wire displacement data according to the detection data is performed, the CMOS photoreceptor is a matrix composed of hundreds of photoelectric devices, just like a camera, and is used for shooting the picture of physical displacement of the bonding wire a, the optical sensor 45 amplifies and projects the optical signal received by the second lens 43c onto the CMOS matrix to form a frame, then converts the framed image from the optical signal into an electrical signal, and transmits the electrical signal to the DSP for processing, and after the DSP performs noise removal and analysis on the difference between adjacent frames, the bonding wire displacement information is obtained and then transmitted to an external computer device through an output terminal 47 of the interface circuit, the external computer equipment can generate control information of the movement speed of the bonding wire a according to the control information, so that the displacement of the bonding wire can be detected in real time and controlled, if the displacement of the bonding wire is detected to be too high, the paying-off speed of the bonding wire is reduced, otherwise, the paying-off speed of the bonding wire is increased, and the welding quality can be improved.
The detailed implementation of the method of the embodiment can refer to the relevant content in the product embodiments, the method performs non-contact displacement detection on the near end of the welding position through the welding wire displacement detection assembly 40, reduces errors caused by bending of the aluminum wire, reduces the movement resistance of the welding wire a by matching with the wire glass tube 42, and improves the accuracy and reliability of the displacement detection of the welding wire.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.
Claims (10)
1. A bonding head with contactless wire displacement detection, comprising: the device comprises a fixing ring, a welding assembly, a welding wire clamp assembly and a welding wire displacement detection assembly;
the welding assembly is fixed on the fixing ring;
the welding wire clamp assembly comprises a clamp fixing arm, a movable arm, a clamp clamping jaw and a wire guide groove; the wire clamp fixing arm is fixed on the fixing ring, the movable arm is connected to the wire clamp fixing arm, the wire clamp clamping jaws are respectively arranged at the tail ends of the wire clamp fixing arm and the movable arm, and the wire clamp clamping jaws are clamped with the wire guide groove;
the welding wire displacement detection assembly comprises a guide wire fixing seat, a glass tube for passing wires, an optical lens assembly, a light source and an optical sensor, wherein the guide wire fixing seat is fixed on the wire clamp fixing arm;
the welding wire sequentially penetrates through the wire glass tube, the guide wire fixing seat and the wire guide groove, and the welding wire displacement detection assembly detects displacement of the welding wire section in the guide wire fixing seat in real time in a non-contact mode.
2. The bond head with contactless wire displacement detection of claim 1, wherein the optical lens assembly comprises a frame and first and second lenses disposed in the frame;
one side of the mirror bracket is embedded in the guide wire fixing seat, the other side of the mirror bracket is embedded in the circuit board, the light source is opposite to the first lens, the second lens is opposite to the optical sensor, light passing through the first lens is projected to a welding wire in the guide wire fixing seat, and light reflected by the welding wire in the guide wire fixing seat is received by the optical sensor through the second lens.
3. The bonding head of claim 2 wherein said optical sensor comprises a CMOS photoreceptor and a digital signal processor, wherein said light from said light source is projected onto said bonding wire at said lower outlet end of said glass fiber tube through said first lens, said reflected light from said bonding wire is projected onto said CMOS photoreceptor through said second lens, so as to collect successive image frames of said bonding wire, and said digital signal processor compares adjacent image frames to detect the displacement of said bonding wire.
4. The bond head with contactless bond wire displacement detection as recited in claim 2, further comprising an output terminal on the circuit board for connection to an external device, the output terminal being located on a side of the circuit board remote from the optical lens assembly.
5. The welding head with contactless wire displacement detection of claims 1 to 4, wherein said welding assembly comprises a transducer, a welding steel nozzle and a transducer mount, said transducer is fixed to said fixing ring by said transducer mount, said glass fiber tube and said welding steel nozzle are both disposed through said transducer, and the front end of the welding wire passing through said wire guide channel is aligned with the welding position of said welding steel nozzle.
6. The bonding head with contactless wire displacement detection of claim 5, wherein the wire holder comprises a through hole parallel to the welding steel nozzle and a counter bore perpendicular to the through hole and communicating with the through hole, the wire glass tube is partially embedded in the through hole, and the second lens faces the counter bore.
7. The bond head with noncontact wire displacement detection of any one of claims 1 to 4 wherein said movable arm is connected to said wire clamp fixed arm by a wire clamp spring.
8. A welding apparatus comprising a welding head with contactless wire displacement detection according to any of claims 1 to 7.
9. A method of wire displacement detection for use in a bonding head with contactless wire displacement detection according to any of claims 1 to 7 or in a bonding apparatus according to claim 8, the method comprising:
enabling the welding wire to move to a welding position along a movement path formed by connecting the glass tube with the wire, the wire guide fixing seat and the wire guide groove according to a preset welding wire movement speed;
the light source is projected on a welding line at the lower end of the outlet of the wire glass tube through the optical lens assembly, reflected light of the welding line passes through the optical lens assembly and is collected by the optical sensor, continuous image frame collection is achieved on the welding line through the optical sensor, noise elimination and analysis are conducted on the collected continuous image frames to obtain welding line displacement information, the welding line displacement information is output to displacement detection external computer equipment, and therefore the computer equipment can generate control information of the movement speed of the welding line according to the welding line displacement information.
10. The method for detecting displacement of a bonding wire according to claim 9, wherein the step of projecting the light source onto the bonding wire at the lower end of the outlet of the glass tube through the optical lens assembly, the step of collecting the reflected light from the bonding wire by the optical sensor through the optical lens assembly, the step of collecting the continuous image frames of the bonding wire by the optical sensor, and the step of denoising and analyzing the collected continuous image frames to obtain the displacement information of the bonding wire specifically comprises the steps of:
and the light source is projected on a welding wire at the lower end of the outlet of the wire glass tube through a first lens in the optical lens assembly, reflected light of the welding wire passes through a second lens in the optical lens assembly and is collected by a CMOS (complementary metal oxide semiconductor) photoreceptor in the optical sensor, continuous image frame collection is realized on the welding wire through a digital signal processor in the optical sensor, and meanwhile, the digital signal processor is used for removing noise and analyzing the collected continuous image frames to obtain welding wire displacement information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210524685.4A CN114952131A (en) | 2022-05-13 | 2022-05-13 | Bond head with contactless bond wire displacement detection and related apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210524685.4A CN114952131A (en) | 2022-05-13 | 2022-05-13 | Bond head with contactless bond wire displacement detection and related apparatus and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114952131A true CN114952131A (en) | 2022-08-30 |
Family
ID=82982764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210524685.4A Pending CN114952131A (en) | 2022-05-13 | 2022-05-13 | Bond head with contactless bond wire displacement detection and related apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114952131A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1154130A (en) * | 1980-09-03 | 1983-09-20 | Serge Bauduin | Method and device for the measurement of linear speeds without contact and without marking |
| JPH09295141A (en) * | 1996-05-10 | 1997-11-18 | Nippon Steel Corp | Method for feeding wire for welding |
| EP1352698A1 (en) * | 2002-04-12 | 2003-10-15 | Mechafin AG | Apparatus for feeding wire for welding device with device for measuring the wire speed |
| CN1471448A (en) * | 2000-11-02 | 2004-01-28 | ��Ŧ�� | Detecting element for a welding device |
| DE102004055561A1 (en) * | 2004-11-18 | 2006-06-01 | Christofori, Klaus, Dr. | Length measuring sensor for e.g. pipe, has selection circuits accepting information from light-sensitive units, transfer circuit arranged between units and selection circuits, and lighting provided with adjustable, variable ray geometry |
| CN102981009A (en) * | 2012-11-20 | 2013-03-20 | 北京工业大学 | Indirect speed measuring device |
| KR20160067535A (en) * | 2014-12-04 | 2016-06-14 | 주식회사 포스코 | Apparatus and Method for preventing erroneous detection of welding part |
| US20170095873A1 (en) * | 2012-02-10 | 2017-04-06 | Illinois Tool Works Inc. | Optical-based weld travel speed sensing system |
| CN108726338A (en) * | 2017-04-19 | 2018-11-02 | 奥的斯电梯公司 | The speed detector and its speed detection method of the handrail of passenger conveyor |
| RU2708867C1 (en) * | 2018-11-20 | 2019-12-11 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | Method for stabilization of filler wire feed speed and device for its implementation |
| CN211438592U (en) * | 2019-12-27 | 2020-09-08 | 武汉汉双技术有限公司 | Laser welding wire feeding device |
| CN214161873U (en) * | 2020-11-09 | 2021-09-10 | 深圳新控自动化设备有限公司 | Welding head structure |
| CN215238517U (en) * | 2021-01-15 | 2021-12-21 | 深圳市顺昱自动化设备有限公司 | Welding wire clamping mechanism of ultrasonic aluminum wire press welder |
-
2022
- 2022-05-13 CN CN202210524685.4A patent/CN114952131A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1154130A (en) * | 1980-09-03 | 1983-09-20 | Serge Bauduin | Method and device for the measurement of linear speeds without contact and without marking |
| JPH09295141A (en) * | 1996-05-10 | 1997-11-18 | Nippon Steel Corp | Method for feeding wire for welding |
| CN1471448A (en) * | 2000-11-02 | 2004-01-28 | ��Ŧ�� | Detecting element for a welding device |
| EP1352698A1 (en) * | 2002-04-12 | 2003-10-15 | Mechafin AG | Apparatus for feeding wire for welding device with device for measuring the wire speed |
| DE102004055561A1 (en) * | 2004-11-18 | 2006-06-01 | Christofori, Klaus, Dr. | Length measuring sensor for e.g. pipe, has selection circuits accepting information from light-sensitive units, transfer circuit arranged between units and selection circuits, and lighting provided with adjustable, variable ray geometry |
| US20170095873A1 (en) * | 2012-02-10 | 2017-04-06 | Illinois Tool Works Inc. | Optical-based weld travel speed sensing system |
| CN102981009A (en) * | 2012-11-20 | 2013-03-20 | 北京工业大学 | Indirect speed measuring device |
| KR20160067535A (en) * | 2014-12-04 | 2016-06-14 | 주식회사 포스코 | Apparatus and Method for preventing erroneous detection of welding part |
| CN108726338A (en) * | 2017-04-19 | 2018-11-02 | 奥的斯电梯公司 | The speed detector and its speed detection method of the handrail of passenger conveyor |
| RU2708867C1 (en) * | 2018-11-20 | 2019-12-11 | федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") | Method for stabilization of filler wire feed speed and device for its implementation |
| CN211438592U (en) * | 2019-12-27 | 2020-09-08 | 武汉汉双技术有限公司 | Laser welding wire feeding device |
| CN214161873U (en) * | 2020-11-09 | 2021-09-10 | 深圳新控自动化设备有限公司 | Welding head structure |
| CN215238517U (en) * | 2021-01-15 | 2021-12-21 | 深圳市顺昱自动化设备有限公司 | Welding wire clamping mechanism of ultrasonic aluminum wire press welder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180015571A1 (en) | Infrared vision sensing detection method and device for narrow-gap weld seam deviation | |
| WO2016086667A1 (en) | Optical fiber detection device | |
| TW201137509A (en) | Lens flare testing device and method for testing lens flare | |
| CN114952131A (en) | Bond head with contactless bond wire displacement detection and related apparatus and method | |
| CN103728373B (en) | Ultrasound wave sweeping seam tracking system and method | |
| JP2008070158A (en) | Amplitude measuring method and frequency measuring method of ultrasonic horn, measuring instrument using method, and ultrasonic bonding device using it | |
| CN109632827A (en) | A kind of workpiece hole location imaging detection device | |
| CN211179649U (en) | Ultrasonic scanning device for tension clamp of high-voltage overhead transmission line conductor | |
| CN209231437U (en) | A kind of sliding detection device of urban track traffic heat | |
| CN201862934U (en) | Contact type distance measuring device | |
| CN105157652B (en) | A kind of pantograph collector head carbon sliding block thickness detecting method | |
| CN103439253B (en) | Enamelled wire particle online-detection device | |
| CN109759676B (en) | Manual welding speed detection equipment | |
| CN2914031Y (en) | Fiber laser weld image sensor | |
| CN202411630U (en) | Welding joint recognizing sensing device based on surface auxiliary light source | |
| CN210551358U (en) | Welding robot vision subassembly | |
| JP2000343986A (en) | Trolley line supporting metal fitting mounting angle measuring device | |
| CN218847975U (en) | Workpiece double-face visual detection equipment | |
| CN216813541U (en) | Fixing device for X-ray detection of pipeline welding seam | |
| CN218468586U (en) | Visual inspection fixing frame assembly for components | |
| CN204462038U (en) | A kind of electric connector housing machine vision on-line detecting system | |
| CN2901425Y (en) | Fingerprint collector | |
| CN220574995U (en) | Laser welding device with display imaging detection function | |
| CN214293106U (en) | Plane intelligent processing robot | |
| CN210222196U (en) | Camera movement detection span and automatic testing device for flexible circuit board |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Building 201, Building C2, Ruiming Industrial Park, No. 44 Hexiu West Road, Zhancheng Community, Fuhai Street, Bao'an District, Shenzhen, Guangdong Province, 518000 Applicant after: Shenzhen Xinyichang Kaijiu Automation Equipment Co.,Ltd. Address before: 518000 Room 401, building 3, Weihao Industrial Park, Shakeng Road, sunshine community, Xili street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: SHENZHEN KAIJIU AUTOMATION EQUIPMENT CO.,LTD. |