CN102151994A - Laser spot welding assembly method of magnetic circuit system of miniature loudspeaker - Google Patents
Laser spot welding assembly method of magnetic circuit system of miniature loudspeaker Download PDFInfo
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- CN102151994A CN102151994A CN2011101069886A CN201110106988A CN102151994A CN 102151994 A CN102151994 A CN 102151994A CN 2011101069886 A CN2011101069886 A CN 2011101069886A CN 201110106988 A CN201110106988 A CN 201110106988A CN 102151994 A CN102151994 A CN 102151994A
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- magnetic circuit
- circuit system
- yoke
- top board
- spot welding
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Abstract
The invention relates to a laser spot welding assembly method of a magnetic circuit system of a miniature loudspeaker and belongs to the manufacturing technology field of miniature loudspeakers. Welding spots are reasonably arranged by the adoption of the laser spot welding method according to the dimension and the shape of the magnetic circuit system to realize the one-step forming of the laser spot welding of the magnetic circuit system of the miniature loudspeaker; and a joint is stable and has high efficiency and low cost. After the welding, a top plate, a magnet yoke and a permanent magnet are tightly fitted; and the assembled magnetic circuit system has small volume, and the acoustical property of the magnetic circuit system is basically unchanged. Any substances capable of polluting the environment are not used or discharged during the welding process, so that the working environment is clean. Therefore, the laser spot welding assembly method not only can overcome the defects in the prior art, but also can provides a shortcut for solving the assembly problem of the magnetic circuit system of the miniature loudspeaker.
Description
Technical field
The present invention relates to a kind of assembly method of Microspeaker magnetic circuit system, belong to the manufacturing technology field of Microspeaker.
Background technology
Microspeaker generally includes three parts: magnetic circuit system, vibrational system and support system.Magnetic circuit system is made up of permanent magnet, yoke and top board, is used to the magnetic field that provides constant, and wherein permanent magnet is general adopts high performance sintered NdFeB permanent magnet, and yoke and top board generally adopt permeability mild steel preferably; Vibrational system by bobbin, vibrating diaphragm, damper, dust cover and grip the ring form; Support system is made up of framework and packing ring, and its effect is protection magnetic circuit system and vibrational system.
The assembling of tradition Microspeaker magnetic circuit system is mainly finished by using adhesive to glued joint, as shown in Figure 1.Yet adhesive bonding technique is ripe not enough at present, and mainly have following shortcoming: (1) adhesive costs an arm and a leg, and causes Microspeaker manufacturing cost height; (2) adhesive itself take up space and quality unfavorable to the microminiaturization and the lightweight of Microspeaker; (3) the adhesive solidification time long, need firing equipment and the special-purpose tool that is installed, efficient is low-cost high; (4) adhesive hear resistance and poor durability cause unstable product quality; (5) adhesive itself may cause environmental pollution.
Summary of the invention
The invention provides a kind of laser spot welding assembly method of Microspeaker magnetic circuit system, prior art cost height, efficient are low to overcome, poor durability, pollution is big and be unfavorable for the microminiaturization of Microspeaker and shortcoming such as lightweight.
Technical scheme of the present invention is as follows:
A kind of laser spot welding assembly method of Microspeaker magnetic circuit system is characterized in that: adopt laser spot welding method, concrete steps are as follows:
1) top board, permanent magnet and the yoke of magnetic circuit system are stacked by from top to bottom order;
2) part to be welded that will stack with anchor clamps is fixed on the workbench of laser instrument, and travelling table makes laser head aim at the solder joint for the treatment of on first surface to be welded;
3) open laser instrument, set laser parameter, and feed protective gas, all that weld successively on first surface to be welded are treated solder joint then; Described laser parameter is provided with as follows: pulse peak power is 300～1000W, and pulsewidth is 10～20ms, and defocusing amount is 0～3.5mm;
4) with 180 ° of part upsets to be welded, all that weld successively on another surface to be welded of part to be welded are treated solder joint.
The laser spot welding assembly method of Microspeaker magnetic circuit system of the present invention is characterized in that: described first surface to be welded is top board or yoke.
The laser spot welding assembly method of Microspeaker magnetic circuit system of the present invention is characterized in that: described laser instrument is the Nd:YAG solid state laser; Described protective gas adopts argon gas or nitrogen.
The laser spot welding assembly method of Microspeaker magnetic circuit system of the present invention, it is characterized in that: when the permanent magnet in the described magnetic circuit system is circle, the arrangement mode of the solder joint on its top board and the yoke adopts single solder joint to be arranged in top board and yoke center, the center of perhaps adopting many solder joints evenly to be arranged in top board and yoke is on the circumference in the center of circle, perhaps adopts the solder joint of arranging at top board and yoke center a plurality of solder joints of evenly arranging on the center with top board and yoke is the circumference in the center of circle simultaneously.
The laser spot welding assembly method of Microspeaker magnetic circuit system of the present invention is characterized in that: described many solder joints are 2～9 solder joints.
The laser spot welding assembly method of Microspeaker magnetic circuit system of the present invention, it is characterized in that: when the permanent magnet in the described magnetic circuit system when being square, the arrangement mode of the solder joint on its top board and the yoke adopts 1～8 solder joint evenly to be arranged on the major axis of top board and yoke.
The present invention compared with prior art has the following advantages and the effect of high-lighting:
1) buy laser instrument after, the input of later stage on each product is low; 2) postwelding top board, yoke and permanent magnet fit tightly, and make the magnetic circuit system volume reduce greatly, thereby help the microminiaturization and the lightweight of Microspeaker; 3) utilize the quick scanning of laser to weld, can greatly enhance productivity; 4) welding one-shot forming, the postwelding joint is firm, and solder joint can be ignored the magnetics and the acoustics Effect on Performance of permanent magnet integral body; 5) the laser spot welding process can not cause environmental pollution.
Therefore, the inventive method not only can overcome the deficiencies in the prior art, also provides a shortcut for an assembling difficult problem that solves the Microspeaker magnetic circuit system.
Description of drawings
Fig. 1 is the bonded process assembling schematic diagram of traditional Microspeaker magnetic circuit system.
Fig. 2 is acoustical behavior comparison diagram before and after the magnetic circuit system welding.
Fig. 3 adopts the positive view (for the circular permanent magnet magnetic circuit system, single solder joint is positioned at top board and yoke center) of the laser spot welding assembling of single solder joint for the present invention.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 adopts the laser spot welding of first kind of embodiment of many solder joints to assemble for the present invention positive view (for the circular permanent magnet magnetic circuit system, it is on the circumference in the center of circle that many solder joints are positioned at top board and yoke center).
Fig. 6 is the vertical view of Fig. 5.
Fig. 7 adopts the positive view (for the circular permanent magnet magnetic circuit system, many solder joints are positioned at top board and yoke center and are on the circumference in the center of circle with top board and yoke center) of laser spot welding assembling of second kind of embodiment of many solder joints for the present invention.
Fig. 8 is the vertical view of Fig. 7.
Fig. 9 is the positive view (many solder joints are positioned on the major axis of top board and yoke) of the laser spot welding assembling of the embodiment of many solder joints of square permanent magnet magnetic circuit system.
Figure 10 is the vertical view of Fig. 9.
Among Fig. 1 to Figure 10, symbol description is as follows:
The 1-top board, 2-adhesive, 3-permanent magnet, 4-yoke, the solder joint of 5-laser spot welding.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is done more detailed, complete explanation:
The laser spot welding assembly method of a kind of Microspeaker magnetic circuit system provided by the invention adopts laser spot welding method, and concrete steps are as follows:
1) top board, permanent magnet and the yoke of magnetic circuit system are stacked by from top to bottom order;
2) part to be welded that will stack with anchor clamps is fixed on the workbench of laser instrument, and travelling table makes laser head aim at the solder joint for the treatment of on first surface to be welded;
3) open laser instrument, set laser parameter, and feed protective gas, all that weld successively on first surface to be welded are treated solder joint then; Described laser parameter is provided with as follows: pulse peak power is 300～1000W, and pulsewidth is 10～20ms, and defocusing amount is 0～3.5mm;
4) with 180 ° of part upsets to be welded, all that weld successively on another surface to be welded of part to be welded are treated solder joint.
First surface to be welded of the present invention is top board or yoke.Laser instrument of the present invention is the Nd:YAG solid state laser; Described protective gas adopts argon gas or nitrogen.When the permanent magnet in the magnetic circuit system of the present invention is circle, the arrangement mode of the solder joint on its top board and the yoke adopts single solder joint to be arranged in top board and yoke center, the center of perhaps adopting many solder joints evenly to be arranged in top board and yoke is on the circumference in the center of circle, perhaps adopts the solder joint of arranging at top board and yoke center a plurality of solder joints of evenly arranging on the center with top board and yoke is the circumference in the center of circle simultaneously.Many solder joints of the present invention are 2～9 solder joints.When the permanent magnet in the magnetic circuit system of the present invention when being square, the arrangement mode of the solder joint on its top board and the yoke adopts 1～8 solder joint evenly to be arranged on the major axis of top board and yoke.
Shown in Fig. 3,4, be the assembling of the less magnetic circuit system of circle and radius for permanent magnet 3, adopt single solder joint to be arranged in top board 1 and yoke 4 is carried out laser spot welding in the center separately.That wherein permanent magnet adopts is high performance sintered NdFeB permanent magnet N48, and top board 1 and yoke 4 adopt the cold-rolled low carbon steel of common quality.Top board 1, permanent magnet 3 and the yoke 4 of magnetic circuit system are stacked by from top to bottom order; The part to be welded that will stack with anchor clamps is fixed on the workbench of Nd:YAG laser instrument, and the position of travelling table makes the solder joint for the treatment of on the laser head aligning top board 1; Open laser instrument, it is as follows that laser parameters is set: pulse peak power is 812.5W, and pulsewidth is 16ms, and defocusing amount is 0mm, uses argon gas as protection gas; Lead to argon gas, weld the solder joint for the treatment of at top board 1 center; With 180 ° of part upsets to be welded, weld the solder joint for the treatment of at yoke 4 centers.
After testing: the one-shot forming of present embodiment laser spot welding, top board, yoke and permanent magnet fit tightly, and the magnetic circuit system volume that is assembled is little, and the joint shear-type load is 57.5N, and joint is firm; As shown in Figure 2, before and after the welding, the acoustical behavior of magnetic circuit system is suitable substantially; The material of any contaminated environment is not used or discharged to welding process, the working environment cleaning.
Shown in Fig. 5,6, be the assembling of the bigger magnetic circuit system of circle and radius for permanent magnet 3, adopt 4 solder joints evenly be arranged in top board 1 and yoke 4 separately the center be to carry out laser spot welding on the circle in the center of circle.That wherein permanent magnet adopts is high performance sintered NdFeB permanent magnet N48, and top board 1 and yoke 4 adopt the cold-rolled low carbon steel of common quality.Top board 1, permanent magnet 3 and the yoke 4 of magnetic circuit system are stacked by from top to bottom order; The part to be welded that will stack with anchor clamps is fixed on the workbench of Nd:YAG laser instrument, and the position of travelling table makes the solder joint for the treatment of on the laser head aligning yoke 4; Open laser instrument, it is as follows that laser parameters is set: pulse peak power is 300W, and pulsewidth is 10ms, and defocusing amount is 0mm, uses nitrogen as protection gas; Logical nitrogen welds the solder joint for the treatment of on the yoke 4 successively; With 180 ° of part upsets to be welded, weld the solder joint for the treatment of on the top board 1 successively.
After testing: the one-shot forming of present embodiment laser spot welding, top board, yoke and permanent magnet fit tightly, and the magnetic circuit system volume that is assembled is little, and the joint shear-type load is 96.0N, and joint is firm; Before and after the welding, the acoustical behavior of magnetic circuit system is suitable substantially; The material of any contaminated environment is not used or discharged to welding process, the working environment cleaning.
Shown in Fig. 9,10, be the assembling of square magnetic circuit system for permanent magnet 3, adopt 2 solder joints evenly to be arranged on the major axis of top board 1 and yoke 4 and carry out laser spot welding.That wherein permanent magnet adopts is high performance sintered NdFeB permanent magnet N48, and top board 1 and yoke 4 adopt the cold-rolled low carbon steel of common quality.Top board 1, permanent magnet 3 and the yoke 4 of magnetic circuit system are stacked by from top to bottom order; The part to be welded that will stack with anchor clamps is fixed on the workbench of Nd:YAG laser instrument, and the position of travelling table makes the solder joint for the treatment of on the laser head aligning top board 1; Open laser instrument, it is as follows that laser parameters is set: pulse peak power is 1000W, and pulsewidth is 20ms, and defocusing amount is 3.5mm, uses argon gas as protection gas; Logical argon gas welds the solder joint for the treatment of on the top board 1 successively; With 180 ° of part upsets to be welded, weld the solder joint for the treatment of on the yoke 4 successively.
After testing: the one-shot forming of present embodiment laser spot welding, top board, yoke and permanent magnet fit tightly, and the magnetic circuit system volume that is assembled is little, and the joint shear-type load is 56.0N, and joint is firm; Before and after the welding, the acoustical behavior of magnetic circuit system is suitable substantially; The material of any contaminated environment is not used or discharged to welding process, the working environment cleaning.
Claims (6)
1. the laser spot welding assembly method of a Microspeaker magnetic circuit system is characterized in that this method carries out as follows:
1) top board, permanent magnet and the yoke of magnetic circuit system are stacked by from top to bottom order;
2) part to be welded that will stack with anchor clamps is fixed on the workbench of laser instrument, and travelling table makes laser head aim at the solder joint for the treatment of on first surface to be welded;
3) open laser instrument, set laser parameter, and feed protective gas, all that weld successively on first surface to be welded are treated solder joint then; Described laser parameter is provided with as follows: pulse peak power is 300～1000W, and pulsewidth is 10～20ms, and defocusing amount is 0～3.5mm;
4) with 180 ° of part upsets to be welded, all that weld successively on another surface to be welded of part to be welded are treated solder joint.
2. the laser spot welding assembly method of Microspeaker magnetic circuit system according to claim 1 is characterized in that: described first surface to be welded is top board or yoke.
3. the laser spot welding assembly method of Microspeaker magnetic circuit system according to claim 1 is characterized in that: described laser instrument is the Nd:YAG solid state laser; Described protective gas adopts argon gas or nitrogen.
4. the laser spot welding assembly method of Microspeaker magnetic circuit system according to claim 1, it is characterized in that: when the permanent magnet in the described magnetic circuit system is circle, the arrangement mode of the solder joint on its top board and the yoke adopts single solder joint to be arranged in top board and yoke center, the center of perhaps adopting many solder joints evenly to be arranged in top board and yoke is on the circumference in the center of circle, perhaps adopts the solder joint of arranging at top board and yoke center a plurality of solder joints of evenly arranging on the center with top board and yoke is the circumference in the center of circle simultaneously.
5. the laser spot welding assembly method of Microspeaker magnetic circuit system according to claim 4 is characterized in that: described many solder joints are 2～9 solder joints.
6. the laser spot welding assembly method of Microspeaker magnetic circuit system according to claim 1, it is characterized in that: when the permanent magnet in the described magnetic circuit system when being square, the arrangement mode of the solder joint on its top board and the yoke adopts 1～8 solder joint evenly to be arranged on the major axis of top board and yoke.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101069886A CN102151994A (en) | 2011-04-27 | 2011-04-27 | Laser spot welding assembly method of magnetic circuit system of miniature loudspeaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101069886A CN102151994A (en) | 2011-04-27 | 2011-04-27 | Laser spot welding assembly method of magnetic circuit system of miniature loudspeaker |
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| CN102151994A true CN102151994A (en) | 2011-08-17 |
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| CN2011101069886A Pending CN102151994A (en) | 2011-04-27 | 2011-04-27 | Laser spot welding assembly method of magnetic circuit system of miniature loudspeaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620734A (en) * | 2018-05-09 | 2018-10-09 | 上海航天设备制造总厂有限公司 | A kind of etching web filter pulse laser automatic soldering method |
| CN109070271A (en) * | 2016-04-14 | 2018-12-21 | 通用汽车环球科技运作有限责任公司 | The laser spot welding of stacked aluminium workpiece |
Citations (3)
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| US4626653A (en) * | 1983-06-24 | 1986-12-02 | Sciaky, S.A. | Method of and installation for spot-welding by laser beam |
| JP2008272767A (en) * | 2007-04-26 | 2008-11-13 | Kanto Auto Works Ltd | Laser welding apparatus and method of quality control in laser welding |
| CN101456100A (en) * | 2007-12-14 | 2009-06-17 | 上海力声特医学科技有限公司 | Laser welding method of electrode collar in artificial cochlea and platiniridium wire |
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2011
- 2011-04-27 CN CN2011101069886A patent/CN102151994A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4626653A (en) * | 1983-06-24 | 1986-12-02 | Sciaky, S.A. | Method of and installation for spot-welding by laser beam |
| JP2008272767A (en) * | 2007-04-26 | 2008-11-13 | Kanto Auto Works Ltd | Laser welding apparatus and method of quality control in laser welding |
| CN101456100A (en) * | 2007-12-14 | 2009-06-17 | 上海力声特医学科技有限公司 | Laser welding method of electrode collar in artificial cochlea and platiniridium wire |
Non-Patent Citations (3)
| Title |
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| 《激光技术》 20100331 白少俊等 工艺参量对NdFeB永磁体和SPCC钢激光点焊质量的影响 第149-153页 6 第34卷, 第2期 * |
| 常保华等: "SPCC钢与NdFeB永磁体的激光点焊", 《清华大学学报》 * |
| 白少俊等: "工艺参量对NdFeB永磁体和SPCC钢激光点焊质量的影响", 《激光技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109070271A (en) * | 2016-04-14 | 2018-12-21 | 通用汽车环球科技运作有限责任公司 | The laser spot welding of stacked aluminium workpiece |
| CN109070271B (en) * | 2016-04-14 | 2020-11-10 | 通用汽车环球科技运作有限责任公司 | Laser spot welding of stacked aluminum workpieces |
| CN108620734A (en) * | 2018-05-09 | 2018-10-09 | 上海航天设备制造总厂有限公司 | A kind of etching web filter pulse laser automatic soldering method |
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Application publication date: 20110817 |