CN113369689A - Mold for laser brazing of vibrating mirror of sensor socket and tail end lead and connecting method - Google Patents
Mold for laser brazing of vibrating mirror of sensor socket and tail end lead and connecting method Download PDFInfo
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- CN113369689A CN113369689A CN202110735495.2A CN202110735495A CN113369689A CN 113369689 A CN113369689 A CN 113369689A CN 202110735495 A CN202110735495 A CN 202110735495A CN 113369689 A CN113369689 A CN 113369689A
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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
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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
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
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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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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Abstract
The invention relates to the field of aviation fine part welding, and discloses a galvanometer laser brazing die for a sensor socket and a tail end lead and a connecting method, wherein cross grooves are uniformly formed in the surface of a body of the die; the number of the cross grooves is the same as that of socket pins to be welded; the method is that a mould is assembled on a socket to be welded; inserting a tail end lead into a pin of the socket, cutting a proper amount of brazing filler metal and placing the brazing filler metal in a transverse groove of a cross groove of the die, and adjusting a laser scanning area path of a galvanometer laser system; setting welding parameters of a galvanometer laser scanning system, and welding the sensor socket and the tail end lead to form a welding joint; and rotating the socket to sequentially complete the welding of all the socket pins. The invention solves the problem that the space is compact and difficult to weld in the traditional flame brazing process, and can realize high-efficiency welding.
Description
Technical Field
The invention relates to the field of aviation fine part welding, in particular to a die and a connecting method for laser brazing of a vibrating mirror of a sensor socket and a tail end lead.
Background
In the field of aerospace electronics, sensing components are common core parts. The socket is used for information interaction between each sensing element and other elements in a quick, simple and convenient mode, the socket is externally connected with a receiving end and internally connected with a reaction end, connection between the socket and the reaction end is usually realized by welding, and the connection quality of the socket determines stability and reliability of information transmission.
The connection of the sensor pins and the multi-strand wires is mainly realized by flame brazing and resistance brazing at present. In the traditional flame brazing process, due to the limitation that the socket is compact in space size and the size of flame beam is large, interference is often generated in the heating process, so that joints in local areas are repeatedly heated for many times, the tissue deterioration is generated, and the quality and the reliability of products are reduced. In addition, the precise operation has high requirements on the skill level capability of operators, and human factors introduce great uncertainty into the final welding quality of products. If resistance welding is adopted, the welding surface is round, welding is not easy to carry out, the electrode and a workpiece are easy to slip, the nugget is inclined and the like, and the welding structure also has interference and is not easy to operate.
Disclosure of Invention
The invention provides a mould and a connection method for laser brazing of a vibrating mirror of a sensor socket and a tail end lead, and aims to solve the problems that in the prior art, the space of the sensor socket and the tail end lead is compact and difficult to weld, and a flame beam is difficult to control and is easy to generate secondary heating to cause tissue deterioration.
The invention adopts the specific scheme that: a mould for laser brazing of a sensor socket and a galvanometer of a tail end lead is characterized in that cross grooves are uniformly formed in the surface of a body of the mould; the number of the cross grooves is the same as that of socket pins needing to be welded.
The cross-shaped groove is formed by arranging a longitudinal groove and a transverse groove in an orthogonal mode.
The width of the longitudinal groove is 2-2.4mm, and the depth is 3-3.5 mm.
The transverse groove is positioned in the middle of the longitudinal groove, the distance from the transverse groove to the front end of the die is 5-10mm, the width of the transverse groove is 0.5-0.8mm, and the depth of the transverse groove is 0.5-0.8 mm.
In another aspect, the present invention provides a galvanometer laser brazing connection method for a sensor socket and a tail lead, the method comprising the steps of:
(1) assembling the die on a socket to be welded to enable pins of the socket to be located at the bottom of a longitudinal groove of the cross-shaped groove of the die;
(2) inserting a tail end lead into a pin of the socket, cutting a proper amount of brazing filler metal and placing the brazing filler metal in a transverse groove of a cross groove of the die, and adjusting a laser scanning area path of a galvanometer laser system;
(3) setting welding parameters of a galvanometer laser scanning system, and welding the sensor socket and the tail end lead to form a welding joint;
(4) and rotating the socket to enable the welding position of the next pin to be positioned right above, and repeating the process to sequentially complete the welding of all the socket pins.
The socket pins in the step (1) are tubular, the outer diameter of the socket pins is 2-2.4mm, the inner diameter of the socket pins is 1.6-2.2mm, the wall thickness of the socket pins is 0.2-0.4mm, and the number of the pins of the socket pins is 3-5.
The brazing filler metal in the step (2) is in a filamentous shape, the diameter of the brazing filler metal is 0.3-0.5mm, and the shearing length of the brazing filler metal is 5-10 mm.
The laser scanning area of the galvanometer laser system in the step (2) is rectangular; the scanning path is parallel to the welding seam direction.
And (3) the laser generating source of the galvanometer laser system in the step (2) is an SPI nanosecond laser, the highest average power of the laser generating source can reach 70W, the wavelength of the laser generating source is 1064 nm, the laser generating source has two working modes of Pulse and continuous CW, and a galvanometer working platform is carried to realize the programmable planning of the scanning area and the scanning path in the step (2).
The welding parameters of the galvanometer laser scanning system in the step (3) comprise a working mode, welding power, welding speed, defocusing amount and processing times, wherein the working mode is a continuous CW working mode, the welding power is 42-70W, the welding speed is 200-500mm/s, the defocusing amount is + 5-15 mm, and the processing times are 10-30 times.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the cross grooves are uniformly formed in the die body, the number of the cross grooves is the same as that of socket pins to be welded, the socket pins are all positioned at the bottom of the longitudinal groove of the cross groove of the die, the tail end lead is inserted into the socket pins, and by adopting a galvanometer laser brazing technology, laser beams deflect through the galvanometer to enable the laser processing focus to rapidly move along a specific scanning track, so that efficient welding is realized. By adopting the welding method, the heating position of the laser is accurate and controllable, and the problems of interference and secondary heating caused by narrow space in the traditional flame brazing processing process can be effectively avoided.
Drawings
FIG. 1 is a schematic view of a mold according to example 2 of the present invention;
FIG. 2 is a schematic view of the mold assembly according to example 2 of the present invention;
FIG. 3 is a schematic view of a laser scanning path during laser brazing of a galvanometer according to the present invention;
FIG. 4 is a schematic view of a mold according to example 3 of the present invention;
FIG. 5 is a schematic view of the mold assembly according to example 3 of the present invention;
FIG. 6 is a macro topography of the invention after the sensor socket is soldered to the tail-end lead;
FIG. 7 is a cross-sectional topographical view of a sensor socket soldered to a tail-end lead in accordance with the present invention;
wherein the reference numerals are respectively:
201. a mold; 202. a sensor socket weld cup; 203. a sensor socket pin; 204. a tail end lead; 205. brazing filler metal; 206. a laser beam.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The invention provides a galvanometer laser brazing die for a sensor socket and a tail end lead, wherein cross grooves are uniformly formed in the surface of a body of the die; the number of the cross grooves is the same as that of socket pins needing to be welded. The material of the mould is ceramic material which does not have obvious chemical reaction with the brazing filler metal.
The cross-shaped groove is formed by arranging a longitudinal groove and a transverse groove in an orthogonal mode.
The width of the longitudinal groove is 2-2.4mm, and the depth is 3-3.5 mm.
The transverse groove is positioned in the middle of the longitudinal groove, the distance from the front end of the die is 5-10mm, the width of the transverse groove is 0.5-0.8mm, and the depth of the transverse groove is 0.5-0.8 mm.
The size of the longitudinal groove and the size of the transverse groove are set to ensure that the socket pins, the tail end lead and the brazing filler metal can be placed in the cross-shaped grooves, and welding is facilitated.
In another aspect, the present invention provides a galvanometer laser brazing connection method for a sensor socket and a tail lead, the method comprising the steps of:
(1) assembling the die on a socket to be welded to enable pins of the socket to be located at the bottom of a longitudinal groove of the cross-shaped groove of the die;
(2) inserting a tail end lead into a pin of the socket, cutting a proper amount of brazing filler metal and placing the brazing filler metal in a transverse groove of a cross groove of the die, and adjusting a laser scanning area path of a galvanometer laser system;
(3) setting welding parameters of a galvanometer laser scanning system, and welding the sensor socket and the tail end lead to form a welding joint;
(4) and rotating the socket to enable the welding position of the next pin to be positioned right above, and repeating the process to sequentially complete the welding of all the socket pins.
The socket pins in the step (1) are tubular, the outer diameter of the socket pins is 2-2.4mm, the inner diameter of the socket pins is 1.6-2.2mm, the wall thickness of the socket pins is 0.2-0.4mm, and the number of the pins of the socket pins is 3-5.
The brazing filler metal in the step (2) is in a filamentous shape, the diameter of the brazing filler metal is 0.3-0.5mm, and the shearing length of the brazing filler metal is 5-10 mm.
The laser scanning area of the galvanometer laser system in the step (2) is rectangular; the scanning path is parallel to the welding seam direction.
And (3) the laser generating source of the galvanometer laser system in the step (2) is an SPI nanosecond laser, the highest average power of the laser generating source can reach 70W, the wavelength of the laser generating source is 1064 nm, the laser generating source has two working modes of Pulse and continuous CW, and a galvanometer working platform is carried to realize the programmable planning of the scanning area and the scanning path in the step (2).
The welding parameters of the galvanometer laser scanning system in the step (3) comprise a working mode, welding power, welding speed, defocusing amount and processing times, wherein the working mode is a continuous CW working mode, the welding power is 42-70W, the welding speed is 200-500mm/s, the defocusing amount is + 5-15 mm, and the processing times are 10-30 times.
The die, the path scanned in the direction parallel to the welding line and the rectangular scanning area jointly play roles in locally heating and rapidly cooling the sensor socket and the tail end lead, so that the heat distribution of the joint is accurately controlled, the wet forming is favorably regulated and controlled, the generation of intermetallic compounds is favorably inhibited, the high-quality joint with good wet forming and controllable interface compounds can be obtained, and the technical resistance that the space is compact and the welding is difficult and the flame beam is difficult to control in the traditional flame brazing process is overcome.
In addition, the base metal and the brazing filler metal to be welded are loaded on the die in a preset mode in the welding process, uncertainty caused by manual operation is greatly reduced, and welding efficiency and quality are effectively improved.
Example 1:
the embodiment provides a galvanometer laser brazing connection method for a sensor socket and a tail end lead, which specifically comprises the following steps:
(1) and processing an auxiliary forming die with an applicable cross-shaped groove, and assembling the auxiliary forming die on the socket to be welded so that the pins of the socket are all positioned at the bottom of the longitudinal groove. The cross-shaped groove is formed by arranging a longitudinal groove and a transverse groove in an orthogonal mode. The width of longitudinal groove is 2mm, and the degree of depth is 3 mm. The transverse groove is positioned in the middle of the longitudinal groove, the distance from the front end of the die is 5mm, the width of the transverse groove is 0.5mm, and the depth of the transverse groove is 0.5 mm.
The socket pin is made of copper alloy, the pin is tubular, the outer diameter of the pin is 2mm, the inner diameter of the pin is 1.6mm, the wall thickness of the pin is 0.2mm, and the number of the pins is 3.
The die is made of a ceramic material, and the ceramic material does not have obvious chemical reaction with the brazing filler metal; and the socket pins, the tail end lead and the brazing filler metal are stably placed in the cross-shaped grooves.
(2) And inserting the tail end lead into the pin of the socket, and shearing a proper amount of brazing filler metal to be placed in the transverse groove of the forming die. And adjusting and designing a laser scanning area path of the galvanometer laser system.
The tail end lead is made of copper and the diameter of the tail end lead is 1.5 mm. The brazing filler metal is made of silver-copper brazing filler metal, the diameter of the filamentous brazing filler metal is 0.3mm, and the shearing length of the filamentous brazing filler metal is 5 mm. In the galvanometer laser system, a laser generating source is an SPI nanosecond laser, the highest average power of the laser generating source can reach 70W, the wavelength of the laser generating source is 1064 nm, the laser generating system has two working modes of Pulse and continuous CW and is provided with a galvanometer working platform.
And before the tail end lead, the socket pins and the brazing filler metal are placed in an auxiliary forming die, cleaning and wiping the tail end lead to be welded and the sensor socket pins by adopting acetone.
(3) And setting welding parameters of a galvanometer laser scanning system, and welding the sensor socket and the tail end lead to form a welding joint. The welding parameters of the galvanometer laser scanning system mainly comprise a working mode, welding power, welding speed, defocusing amount and processing times, wherein the working mode is a continuous CW working mode, the welding power is 42W, the welding speed is 200mm/s, the defocusing amount is +5mm, and the processing times are 10 times.
(4) And rotating the socket to enable the welding position of the next pin to be positioned right above, and repeating the process to sequentially complete the welding of all the socket pins.
Example 2
The tail end wire material in this embodiment is nickel, and the diameter is 2mm, and sensor socket stitch material is the copper alloy pipe, and its external diameter is 2.4mm, and the internal diameter is 2mm, and the wall thickness is 0.4mm, and stitch quantity is 3.
Firstly, an auxiliary forming die with a applicable cross-shaped groove is processed, and the cross-shaped groove is formed by arranging a longitudinal groove and a transverse groove in an orthogonal mode. The width of the longitudinal groove is 2.4mm, and the depth is 3.5 mm. The transverse groove is positioned in the middle of the longitudinal groove, the distance from the front end of the die is 10mm, the width of the transverse groove is 0.8mm, and the depth of the transverse groove is 0.8 mm.
And cleaning and wiping the lead at the tail end to be welded and the pins of the sensor socket by using acetone. And assembling the auxiliary forming die on the socket to be welded so that the pins of the socket are all positioned at the bottom of the longitudinal groove. Referring to fig. 1 and 2, the assembly of the present invention includes an auxiliary forming mold 201 having a cross-shaped groove, a sensor socket solder cup 202, a sensor socket pin 203, a tail wire 204 and a solder 205. The tail end lead 204 is inserted into the socket pin 203, and an appropriate amount of solder is cut and placed in a transverse groove of a forming die. And adjusting and designing a laser scanning area path of the galvanometer laser system, and selecting a processing mode of reciprocating scanning along the axial direction of the brazing filler metal. The scanning area and scanning mode of the galvanometer laser are schematically shown in fig. 3, and the laser beam 206 is scanned back and forth along the axial direction of the brazing filler metal 205 in a processing path 206 mode.
Setting the welding parameters of the galvanometer laser scanning system, setting the working mode of the galvanometer laser scanning system to be a continuous CW working mode, setting the welding power to be 56W, setting the welding speed to be 300mm/s, setting the defocusing amount to be +10mm, and setting the processing times to be 15 times, and welding the tail end lead and the sensor pin to form a welding joint, as shown in figures 6 and 7. The connecting joint obtained by the method is good in forming, has no obvious appearance defect, the brazing filler metal at the section position of the joint fully wets the base metal to be connected, and the base metal has no burning loss, so that the use requirement of industrial production is met.
And rotating the socket, repeating the processes, and sequentially completing the welding of all socket pins to realize local heating and quick cooling.
Example 3
The tail end wire material in this embodiment is nickel, and the diameter is 1.5mm, and sensor socket stitch material is kovar alloy, and its external diameter is 2mm, and the internal diameter is 2.2mm, and the wall thickness is 0.25mm, and stitch quantity is 5.
Firstly, an auxiliary forming die with a applicable cross-shaped groove is processed, and the cross-shaped groove is formed by arranging a longitudinal groove and a transverse groove in an orthogonal mode. The width of the longitudinal groove is 2.2mm, and the depth is 3.3 mm. The transverse groove is positioned in the middle of the longitudinal groove, the distance from the front end of the die is 6mm, the width of the transverse groove is 0.6mm, and the depth of the transverse groove is 0.6 mm.
As shown in fig. 4. And cleaning and wiping the lead at the tail end to be welded and the pins of the sensor socket by using acetone. And the auxiliary forming die is assembled on the socket to be welded, so that the pins of the socket are all positioned at the bottom of the longitudinal groove, as shown in fig. 5. And inserting the tail end lead into the pin of the socket, and shearing a proper amount of brazing filler metal to be placed in the transverse groove of the forming die. And adjusting and designing a laser scanning area path of the galvanometer laser system, and selecting a processing mode of reciprocating scanning along the axial direction of the brazing filler metal. The scanning area and scanning mode of the galvanometer laser are schematically shown in fig. 3, and the laser beam 206 is scanned back and forth along the axial direction of the brazing filler metal 205 in a processing path 206 mode.
And setting welding parameters of a galvanometer laser scanning system, setting the working mode of the galvanometer laser scanning system to be a continuous CW working mode, setting the welding power to be 70W, setting the welding speed to be 500mm/s, setting the defocusing amount to be +15mm, and setting the processing times to be 30 times, and welding the tail end lead and the sensor pin to form a welding joint.
And rotating the socket to enable the welding position of the next pin to be positioned right above, and repeating the process to sequentially complete the welding of all the socket pins.
Compared with the embodiment 2, the pins of the sensor socket connected in the embodiment 3 are denser, as shown in fig. 2 and 5, the number of array pins in the same area is increased from 3 to 5, so that a larger interference problem is generated in the welding process, and the repeated heating phenomenon of the traditional flame brazing is serious.
According to the technical scheme provided by the embodiment, the vibrating mirror laser brazing technology is adopted in the welding process of the sensor socket and the tail end lead, and the laser beam deflects through the vibrating mirror to enable the laser processing focus to move rapidly along the specific scanning track so as to achieve efficient welding. In the welding process, the base metal and the brazing filler metal to be welded are loaded on the die in a preset mode, uncertainty caused by manual operation is greatly reduced, and welding efficiency and quality are effectively improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications may be made to the above-described embodiments, and it is not necessary, nor is it intended to be exhaustive of all the embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (10)
1. A die for laser brazing of a sensor socket and a galvanometer of a tail end lead is characterized in that cross-shaped grooves are uniformly formed in the surface of a body of the die; the number of the cross grooves is the same as that of socket pins needing to be welded.
2. The die for galvanometer laser brazing of a sensor socket to a tail lead according to claim 1, wherein the cross grooves are formed by longitudinal grooves and transverse grooves in an orthogonal manner.
3. The die for galvanometer laser brazing of a sensor socket to a tail lead according to claim 2, wherein the longitudinal groove has a width of 2-2.4mm and a depth of 3-3.5 mm.
4. The die for galvanometer laser brazing of a sensor socket to a tail lead according to claim 3, wherein the transverse groove is located in the middle of the longitudinal groove, the transverse groove is located at a distance of 5-10mm from the front end of the die, the transverse groove has a width of 0.5-0.8mm and a depth of 0.5-0.8 mm.
5. A method for using the die of any one of claims 1-4 for vibrating mirror laser soldering connection of a sensor socket and a tail wire, the method comprising the steps of:
(1) assembling the die on a socket to be welded to enable pins of the socket to be located at the bottom of a longitudinal groove of the cross-shaped groove of the die;
(2) inserting a tail end lead into a pin of the socket, cutting a proper amount of brazing filler metal and placing the brazing filler metal in a transverse groove of a cross groove of the die, and adjusting a laser scanning area path of a galvanometer laser system;
(3) setting welding parameters of a galvanometer laser scanning system, and welding the sensor socket and the tail end lead to form a welding joint;
(4) and rotating the socket to enable the welding position of the next pin to be positioned right above, and repeating the process to sequentially complete the welding of all the socket pins.
6. The vibrating mirror laser brazing connection method for the sensor socket and the tail end lead of claim 5, wherein the socket pins in the step (1) are tubular, the outer diameter of the socket pins is 2-2.4mm, the inner diameter of the socket pins is 1.6-2.2mm, the wall thickness of the socket pins is 0.2-0.4mm, and the number of the socket pins is 3-5.
7. The galvanometer laser brazing connection method for the sensor socket and the tail end lead of claim 5, wherein in the step (2), the brazing filler metal is in a wire shape, the diameter of the brazing filler metal is 0.3-0.5mm, and the shearing length of the brazing filler metal is 5-10 mm.
8. The joining method for galvanometer laser brazing of temperature receiver resistor components according to claim 5, wherein the laser scanning area of the galvanometer laser system in said step (2) is rectangular; the scanning path is parallel to the welding seam direction.
9. The galvanometer laser brazing connection method for the sensor socket and the tail end lead wire according to claim 5, wherein the laser generating source of the galvanometer laser system in the step (2) is an SPI nanosecond laser, the maximum average power of the laser generating source reaches 70W, the wavelength of the laser generating source is 1064 nm, the laser generating source has two working modes of Pulse and continuous CW, and a galvanometer working platform is mounted on the laser generating source to realize the programmable planning of the scanning area and the path in the step (2).
10. The galvanometer laser brazing connection method for the sensor socket and the tail end lead wire as claimed in claim 5, wherein welding parameters of the galvanometer laser scanning system in the step (3) comprise a working mode, welding power, welding speed, defocusing amount and processing times, wherein the working mode is a continuous CW working mode, the welding power is 42-70W, the welding speed is 200-500mm/s, the defocusing amount is + 5-15 mm, and the processing times are 10-30 times.
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| CN206779647U (en) * | 2017-03-27 | 2017-12-22 | 德盈科技（深圳）有限公司 | A kind of fixture for socket positioning soldering |
| CN207372552U (en) * | 2017-10-13 | 2018-05-18 | 扬州海科电子科技有限公司 | A kind of simple frock for RF isolation welding |
| CN107900585A (en) * | 2017-11-27 | 2018-04-13 | 北京无线电测量研究所 | A kind of connector auxiliary welding equipment and its application method |
| CN207930074U (en) * | 2017-12-28 | 2018-10-02 | 南京惠诚工具制造有限公司 | A kind of saw blade automatic brazing device |
| CN112584966A (en) * | 2018-08-21 | 2021-03-30 | 奇昊汽车德国有限责任公司 | Assembly and battery housing with a plurality of assemblies |
| CN209830728U (en) * | 2019-03-27 | 2019-12-24 | 青岛海诺特电器有限公司 | Fuse wire bundle welding fixture |
| CN110238479A (en) * | 2019-06-05 | 2019-09-17 | 中国电子科技集团公司第三十八研究所 | A kind of assembly method and matching tooling of coaxial connector |
| CN210451298U (en) * | 2019-06-24 | 2020-05-05 | 天津市民通有为科技发展有限公司 | 48V socket welding platform for digital communication recorder |
| CN212350925U (en) * | 2020-05-21 | 2021-01-15 | 重庆斯太宝科技有限公司 | Packaging jig for manufacturing temperature sensor chip |
| CN112372204A (en) * | 2020-11-02 | 2021-02-19 | 程艳云 | Positioning welding base for electronic component |
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