CN104128709B - The automatic laser spot welding system of view-based access control model auxiliary positioning and method - Google Patents
The automatic laser spot welding system of view-based access control model auxiliary positioning and method Download PDFInfo
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- CN104128709B CN104128709B CN201410306910.2A CN201410306910A CN104128709B CN 104128709 B CN104128709 B CN 104128709B CN 201410306910 A CN201410306910 A CN 201410306910A CN 104128709 B CN104128709 B CN 104128709B
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- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/22—Spot welding
Abstract
The invention discloses a kind of automatic laser spot welding system and method for view-based access control model auxiliary positioning, wherein image acquiring device is positioned at directly over light source, is IMAQ station immediately below light source, is welding post immediately below laser galvanometer system; Image acquiring device gathers the pin view data of electronic devices and components and reaches graphics processing unit; Graphics processing unit calculates the position data of electronic devices and components pin and reaches control unit; The position data of electronic devices and components pin is reached laser galvanometer system and makes electronic devices and components to be welded move to welding post by control unit; The Pin locations data transformations received is laser galvanometer system corresponding coordinate by laser galvanometer system, and the laser pulse that laser generator produces to act on successively on the different pin of electronic devices and components through laser galvanometer system and electronic devices and components pin is connected with copper bar melting of dispelling the heat.The present invention adopts multistation form, improves positioning precision, and relies on the XY reflecting optics of galvanometer system, not only simplifies the structure of system, reduces system cost, and improve welding efficiency.
Description
Technical field
The present invention relates to the laser welding technology of electronic devices and components, particularly relate to a kind of automatic laser spot welding system and method for view-based access control model auxiliary positioning.
Background technology
Need to use a large amount of electronic devices and components in road vehicle component, these electronic devices and components have many, the closely spaced features of pin, the connection of itself and PCB generally adopts Reflow Soldering, select to weld or the surface installation technique (SurfaceMountTechnology, i.e. SMT) such as wave-soldering.But, some are needed to the application scenario of logical big current, if be directly connected with printed circuit board (PCB) (PCB) by electronic devices and components, can cause that PCB is overheated even causes inefficacy.For this electronic devices and components, need first they to be connected on external copper bar, and then by selecting the modes such as weldering to be connected with PCB, good heat radiation could be ensured while realizing electric function like this.
Realize the electrical connection of electronic devices and components and copper bar, mainly complete the reliable connection between the pin of components and parts and welding copper bus part, and realize this Joining Technology and just need to solve two problems: one is adopt which kind of welding manner to connect fast and reliablely; Two is how pin cannot guarantee weld locations uniformity when welding copper bus position is accurately located.Further, comparatively large and have more pin to need the electronic devices and components of welding and the production in enormous quantities of welding copper bus for size, need efficient and high-precision Joining Technology system and method.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of automatic laser spot welding system and method for view-based access control model auxiliary positioning, multiple pin of electronic devices and components and the quick and precisely connection of welding copper bus part can be ensured, realize reliable and stable weld strength, enhance productivity.
For solving the problems of the technologies described above, the automatic laser spot welding system of view-based access control model auxiliary positioning provided by the invention, for the pin of electronic devices and components being welded to heat radiation copper bar, comprise single axial movement mechanism, light source, image acquiring device, graphics processing unit, laser generator, laser galvanometer system and control unit, described control unit respectively with image acquiring device, graphics processing unit, laser galvanometer system and single axial movement mechanism connection, wherein:
Image acquiring device is positioned at directly over light source, is the IMAQ station of electronic devices and components to be welded immediately below light source, is the welding post of electronic devices and components to be welded immediately below laser galvanometer system;
Electronic devices and components to be welded by fixture be fixed on heat radiation copper bar on and the pin of electronic devices and components be attached to heat radiation copper bar surface, radiating copper ranking is in single axial movement mechanism;
Light source is used for irradiating electronic devices and components surface directly over electronic devices and components to be welded, utilizes the own profile characteristic sum surface optical attribute difference of electronic devices and components, makes the Pin locations of electronic devices and components be presented on heat radiation copper bar;
The view data of pin for gathering the pin view data of the electronic devices and components being in IMAQ station, and is sent to graphics processing unit by image acquiring device;
Graphics processing unit calculates the position data (i.e. the pad coordinate of pin) of electronic devices and components pin according to the view data of electronic devices and components pin, and the position data of pin is sent to control unit;
Control unit drives single axial movement mechanism action, makes electronic devices and components to be welded move to welding post from IMAQ station, and the position data of electronic devices and components pin is sent to laser galvanometer system;
The position data of different for electronic devices and components pin is converted into laser galvanometer system corresponding coordinate by laser galvanometer system, the laser pulse that described laser generator produces acts on the different pins of electronic devices and components through laser galvanometer system successively, and laser pulse produces heat makes electronic devices and components pin be connected to form pad with the melting of heat radiation copper bar.
Further, described system also comprises an installation station, and on installation station, electronic devices and components to be welded to be fixed on by fixture on heat radiation copper bar and the pin of electronic devices and components is attached to heat radiation copper bar surface.Described control unit drives single axial movement mechanism action to make electronic devices and components to be welded move to IMAQ station from erector position, and after electronic devices and components to be welded move to IMAQ station, control unit drives image acquiring device acquisition of image data; Treat that image data acquiring completes, described control unit drives single axial movement mechanism action to make electronic devices and components to be welded move to welding post from IMAQ station, and after electronic devices and components to be welded move to welding post, control unit driving laser galvanometer system welds; When components and parts to be welded have welded, described control unit drives single axial movement mechanism action to make the electronic devices and components of welding move to installation station from welding post.
Wherein, when described light source irradiates directly over electronic devices and components, pin surface and the heat radiation copper bar of electronic devices and components are shown as white, and the pin profile of electronic devices and components is shown as black.
Described single axial movement mechanism is driven by a single-axis servo motor.
For solving the problems of the technologies described above, the present invention also provides a kind of automatic laser spot welding method of view-based access control model auxiliary positioning, comprises the following steps:
Electronic devices and components to be welded are fixed on heat radiation copper bar by fixture by step a, and the pin of electronic devices and components is attached to heat radiation copper bar surface, on the IMAQ station that control unit drives single axial movement mechanism action that electronic devices and components are moved to immediately below light source;
Step b, with light source irradiation electronic devices and components surface, utilizes the own profile characteristic sum surface optical attribute difference of electronic devices and components, makes the Pin locations of electronic devices and components be presented on heat radiation copper bar;
Step c, the image collecting device directly over control unit driving light source carries out image data acquiring to the pin of the electronic devices and components immediately below light source, and the view data of pin is sent to graphics processing unit;
Steps d, utilizes graphics processing unit to calculate the position data of electronic devices and components pin according to the view data of electronic devices and components pin, and the position data of pin is sent to control unit;
Step e, control unit drives single axial movement mechanism action, makes electronic devices and components to be welded move to welding post from IMAQ station, and the position data of electronic devices and components pin is sent to laser galvanometer system;
Step f, the position data of different for electronic devices and components pin is converted into the corresponding coordinate of the inner XY reflecting optics of laser galvanometer system by laser galvanometer system, the laser pulse that laser generator produces acts on the different pins of electronic devices and components through XY reflecting optics successively, and laser pulse produces heat makes electronic devices and components pin be connected to form pad with the melting of heat radiation copper bar.
Wherein, in step a, electronic devices and components to be welded are installed station one and are fixed on heat radiation copper bar by fixture, and the pin of electronic devices and components is attached to heat radiation copper bar surface, fix rear control unit and drive single axial movement mechanism action, make electronic devices and components move to IMAQ station from erector position; After electronic devices and components move to IMAQ station, control unit drives image acquiring device acquisition of image data; After image data acquiring completes, control unit drives single axial movement mechanism action, and make electronic devices and components to be welded move to welding post from IMAQ station, after electronic devices and components move to welding post, control unit driving laser galvanometer system welds; After electronic devices and components have welded, control unit has driven single axial movement mechanism action, has made the electronic devices and components of welding move back to installation station from welding post.
Usefulness of the present invention is:
1) the present invention adopts multistation version, the IMAQ of electronic devices and components and electronic devices and components are located at diverse location respectively with welding of heat radiation copper bar, the accuracy gathering electronic devices and components pin view data can be improved like this, and then the positioning precision improved in welding, be applicable to the electronic devices and components of different size simultaneously;
2) the present invention adopts laser galvanometer system, the XY reflecting optics of its inside is relied on to carry out the reflection of different directions to the laser pulse that laser generator produces, laser pulse is made to focus on the different pin of the electronic devices and components be on welding post successively, not only easily can realize the welding of each pin of electronic devices and components rapidly and accurately, and simplify the structure of system, reduce system cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the automatic laser spot welding system of view-based access control model auxiliary positioning of the present invention;
Fig. 2 is the imaging schematic diagram of electronic devices and components pin of the present invention and heat radiation copper bar;
Fig. 3 is the automatic laser spot welding method flow chart of view-based access control model auxiliary positioning of the present invention.
Wherein description of reference numerals is as follows:
1 is image acquiring device; 2 is light source; 3 is graphics processing unit; 4 is control unit; 5 is laser galvanometer system; 6 is laser generator; 7 is single axial movement mechanism; 8 is electronic devices and components; 81 is the pin of electronic devices and components; 9 is heat radiation copper bar.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is further detailed explanation.
The automatic laser spot welding system of view-based access control model auxiliary positioning provided by the invention, for the pin of electronic devices and components being welded to heat radiation copper bar, as shown in Figure 1, comprise single axial movement mechanism 7, light source 2, image acquiring device 1, graphics processing unit 3, laser generator 6, (there are X reflecting optics and Y reflecting optics two pieces of reflecting optics in its inside to laser galvanometer system 5, these two pieces of reflecting optics are driven by high-precision servo motor, servomotor adjusts the angle of two pieces of reflecting optics respectively under the driving of laser galvanometer system internal controller) and control unit 4 (as PLC, microprocessor etc.), described control unit 4 respectively with image acquiring device 1, graphics processing unit 3, laser galvanometer system 5 is communicated with single axial movement mechanism 7, laser galvanometer system 5 is connected with laser generator 6 by optical fiber, wherein:
Image acquiring device 1 is positioned at directly over light source 2, is the IMAQ station of electronic devices and components 8 to be welded immediately below light source 2, is the welding post of electronic devices and components 8 to be welded immediately below laser galvanometer system 5;
Electronic devices and components to be welded to be fixed in heat radiation copper bar (not shown in figure 1) by fixture and the pin of electronic devices and components is attached to heat radiation copper bar surface, and radiating copper ranking is in single axial movement mechanism 7;
Light source 2 for irradiating electronic devices and components surface directly over electronic devices and components 8 to be welded, utilize the own profile characteristic sum surface optical attribute difference of electronic devices and components, the Pin locations of electronic devices and components is made to be presented on heat radiation copper bar, when light source 2 irradiates directly over electronic devices and components 8, pin 81 surface and the heat radiation copper bar 9 of electronic devices and components are shown as white, the pin profile of electronic devices and components is shown as black, as shown in Figure 2; In the present embodiment, light source is in bowl-shape (or light source is arranged on the bowl-shape reflector opening part that Open Side Down) that Open Side Down, light source (or reflector) has a perforate, image acquiring device is positioned at directly over this perforate, and the electronic devices and components being in IMAQ station are positioned at immediately below perforate;
The view data of pin for gathering the pin view data of the electronic devices and components being in IMAQ station, and is sent to graphics processing unit 3 by image acquiring device 1;
Graphics processing unit 3 calculates the position data of electronic devices and components pin according to the view data of electronic devices and components pin, and the position data of pin is sent to control unit 4;
Control unit 4 drives single axial movement mechanism 7 action, makes electronic devices and components 8 to be welded move to welding post from IMAQ station, and the position data of electronic devices and components pin is sent to laser galvanometer system 5;
The position data of different for electronic devices and components pin is converted into laser galvanometer system corresponding coordinate by laser galvanometer system 5, the laser pulse that described laser generator 6 produces acts on the different pins of electronic devices and components 8 through laser galvanometer system 5 successively, and laser pulse produces heat makes electronic devices and components pin be connected to form pad with the melting of heat radiation copper bar.
In addition, system can also comprise an installation station, electronic devices and components to be welded is fixed on by fixture by this installation station on heat radiation copper bar.Control unit 4 drives single axial movement mechanism 7 action to make electronic devices and components to be welded move to IMAQ station from erector position, and after electronic devices and components to be welded move to IMAQ station, control unit 4 drives image acquiring device 1 acquisition of image data.Treat that image data acquiring completes, described control unit 4 drives single axial movement mechanism 7 action to make electronic devices and components to be welded move to welding post from IMAQ station, and after electronic devices and components to be welded move to welding post, control unit 4 driving laser galvanometer system 5 welds.When components and parts to be welded have welded, described control unit 4 drives single axial movement mechanism 7 action to make the electronic devices and components of welding move to installation station from welding post.
Described single axial movement mechanism is driven by a single-axis servo motor, mobile electron components and parts 8 between IMAQ station and welding post.
The process of aforementioned system, as shown in Figure 3, comprises the following steps:
Step a, electronic devices and components to be welded are fixed on heat radiation copper bar by fixture, and the pin of electronic devices and components is attached to heat radiation copper bar surface, on the IMAQ station that control unit 4 drives single axial movement mechanism 7 action to make electronic devices and components 8 move to immediately below light source 2;
Step b, irradiates electronic devices and components 8 surface with light source 2, utilizes the own profile characteristic sum surface optical attribute difference of electronic devices and components, makes the Pin locations of electronic devices and components be presented on heat radiation copper bar;
Step c, the pin of the electronic devices and components 8 immediately below the 1 pair of light source of the image collecting device directly over control unit 4 driving light source 2 carries out image data acquiring, and the view data of pin is sent to graphics processing unit 3;
Steps d, utilizes graphics processing unit 3 to calculate the position data of electronic devices and components pin according to the view data of electronic devices and components pin, and the position data of pin is sent to control unit 4;
Step e, control unit 4 drives single axial movement mechanism 7 action, makes electronic devices and components to be welded move to welding post from IMAQ station, and the position data of electronic devices and components pin is sent to laser galvanometer system 5;
Step f, the position data of different for electronic devices and components pin is converted into the position coordinates of the inner XY reflecting optics of laser galvanometer system by laser galvanometer system 5, and start laser generator 6 and produce laser pulse, this laser pulse acts on the different pins of electronic devices and components 8 through XY reflecting optics successively, and laser pulse produces heat makes electronic devices and components pin be connected to form pad with the melting of heat radiation copper bar.
The present invention adopts multistation version, the IMAQ of electronic devices and components and electronic devices and components are located at diverse location respectively with welding of heat radiation copper bar, the accuracy gathering electronic devices and components pin view data can be improved like this, and then the positioning precision improved in welding, be applicable to the electronic devices and components of different size simultaneously.Simultaneously, the XY reflecting optics of laser galvanometer system inside is relied on the laser pulse that laser generator produces to be carried out to the reflection of different directions, laser pulse is made to focus on the different pin of the electronic devices and components be on welding post successively, not only easily can realize the welding of each pin of electronic devices and components rapidly and accurately, and simplify the structure of system, reduce system cost.
Above by specific embodiment to invention has been detailed description, this embodiment is only preferred embodiment of the present invention, and it not limits the invention.Without departing from the principles of the present invention; those of ordinary skill in the art by other embodiments all that the modes such as any amendment, equivalent replacement, improvement obtain, all should be considered as in the technology category protected in the present invention under the prerequisite not making creative work.
Claims (4)
1. an automatic laser spot welding method for view-based access control model auxiliary positioning, is characterized in that, comprise the following steps:
Electronic devices and components to be welded are fixed on heat radiation copper bar by fixture by step a, and the pin of electronic devices and components is attached to heat radiation copper bar surface, on the IMAQ station that control unit drives single axial movement mechanism action that electronic devices and components are moved to immediately below light source;
Step b, with light source irradiation electronic devices and components surface, utilizes the own profile characteristic sum surface optical attribute difference of electronic devices and components, makes the Pin locations of electronic devices and components be presented on heat radiation copper bar;
Step c, the image collecting device directly over control unit driving light source carries out image data acquiring to the pin of the electronic devices and components immediately below light source, and the view data of pin is sent to graphics processing unit;
Steps d, utilizes graphics processing unit to calculate the position data of electronic devices and components pin according to the view data of electronic devices and components pin, and the position data of pin is sent to control unit;
Step e, control unit drives single axial movement mechanism action, makes electronic devices and components to be welded move to welding post from IMAQ station, and the position data of electronic devices and components pin is sent to laser galvanometer system;
Step f, the position data of different for electronic devices and components pin is converted into the corresponding coordinate of the inner XY reflecting optics of laser galvanometer system by laser galvanometer system, the laser pulse that laser generator produces acts on the different pins of electronic devices and components through XY reflecting optics successively, and laser pulse produces heat makes electronic devices and components pin be connected to form pad with the melting of heat radiation copper bar.
2. the automatic laser spot welding method of view-based access control model auxiliary positioning according to claim 1, is characterized in that,
In step a, electronic devices and components to be welded are installed station one and are fixed on heat radiation copper bar by fixture, and the pin of electronic devices and components is attached to heat radiation copper bar surface, fixes rear control unit and drives single axial movement mechanism action, make electronic devices and components move to IMAQ station from erector position;
After electronic devices and components move to IMAQ station, control unit drives image acquiring device acquisition of image data;
After image data acquiring completes, control unit drives single axial movement mechanism action, make electronic devices and components to be welded move to welding post from IMAQ station, after electronic devices and components move to welding post, control unit driving laser galvanometer system and laser generator weld;
After electronic devices and components have welded, control unit has driven single axial movement mechanism action, has made the electronic devices and components of welding move back to installation station from welding post.
3. the automatic laser spot welding method of view-based access control model auxiliary positioning according to claim 1, it is characterized in that, when described light source irradiates directly over electronic devices and components, pin surface and the heat radiation copper bar of electronic devices and components are shown as white, and the pin profile of electronic devices and components is shown as black.
4. the automatic laser spot welding method of the view-based access control model auxiliary positioning according to claim 1 or 2 or 3, is characterized in that, described single axial movement mechanism is driven by a single-axis servo motor.
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| CN109175814A (en) * | 2018-10-31 | 2019-01-11 | 昆山华恒焊接股份有限公司 | Welding method, device and computer readable storage medium |
| CN111001936A (en) * | 2019-12-20 | 2020-04-14 | 淮安市文盛电子有限公司 | Laser welding process for high-performance inductor |
| CN112620942A (en) * | 2021-01-14 | 2021-04-09 | 深圳威迈斯新能源股份有限公司 | Copper bar laser welding process method, IGBT module assembly and new energy automobile |
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