CN210435542U

CN210435542U - Light-transmitting type welding device for micro-space metal pin and core wire

Info

Publication number: CN210435542U
Application number: CN201921190817.4U
Authority: CN
Inventors: 张屹; 李彬; 韦海英; 黄凤娇
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-05-01
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses a printing opacity formula welding set of micro-space metal Pin and heart yearn relates to the laser welding technique. The light-transmitting type welding device comprises a welding clamp and a light-transmitting component arranged above the welding clamp, a light-transmitting hole in the light-transmitting component is matched with a welding spot on the metal pin and a core wire, and a laser beam is positioned on the welding spot through the light-transmitting hole, so that the accurate welding of the micro-space metal pin and the core wire is realized, and the damage to a non-welding part is avoided; due to the positioning effect of the light-transmitting holes on the laser beam, the precision requirement of the executing mechanism on the moving position of the laser head is reduced, and the shape of a laser spot is not required to be adjusted during laser welding; actuating mechanism can drive the laser head continuous movement, has realized the fast weld of metal pin with the heart yearn, has improved welding efficiency, and can realize the welding that welding position space is narrow.

Description

Light-transmitting type welding device for micro-space metal pin and core wire

Technical Field

The utility model belongs to the laser welding technique especially relates to a printing opacity formula welding set of fine pitch metal Pin and heart yearn.

Background

The current electronic equipment processing and assembling technology develops towards miniaturization, micronization and greening, so that the coaxial line diameter and the pin pitch of the product are required to be smaller and smaller. The connector for electrical signal transmission and control, as a basic electrical connector, is one of the most common soldering applications for the interconnection soldering of fine pitch metal pins to core wires. The chip or core wire in a non-welding area is easy to damage by the traditional manual soldering, automatic iron soldering or hot air soldering technology, short circuit between electronic equipment is easy to form, the soldering speed is low, and the soldering requirements of the chip and the core wire with the micro-space metal Pin are difficult to meet.

With the development of laser technology, laser welding is gradually and widely applied in manufacturing industry due to its outstanding advantages of high welding speed, small welding deformation, less spatter, easy realization of automation and the like. Meanwhile, laser welding has the advantages of non-contact welding, small welding light spot, small heat affected zone and the like, so the laser welding has wide application prospect in the technical field of metal Pin and core wire welding.

At present, the academic paper of Shanghai university of transportation "optimization of soldering process parameters of multi-solder-point Hot bar (Hot-bar)" takes a cable connector of Fuji corporation as a research object and adopts a welding mode of Hot bar welding to weld, but a welding head of the Hot bar welding is limited by the outer diameter of a welded wire, so that the sharing performance is poor and the Hot bar welding is required to be customized. The study on the laser soldering process of a Micro-USB electronic connector and numerical simulation of the study on the laser soldering process of the Micro-USB electronic connector, which are subjects of study, adopts the laser soldering process to solder a metal Pin and a core wire of the connector, and proposes to use the laser soldering technology to solve the problem of interconnection and welding of the connector and a lead wire, but the study uses a single wire as a welding mode and does not study the efficiency of multiple welding and multiple welding. The company of photon of Japan develops a YAG50W power welding machine which can realize the welding of connectors with the distance of 0.3mm, but the welding machine has high requirements on the precision of an actuating mechanism, extremely high equipment investment cost and relatively large volume, needs to weld point by point, and has lower production efficiency than hot air and hot bar welding. The publication No. CN107199381 entitled a connector soldering process is a patent document, which discloses a series of processes of cleaning and drying an SMP connector and a microwave housing, dispensing solder paste and inserting the connector, then filling solder resist on the connector, soldering the connector and the housing, removing the solder resist and cleaning, and soldering the SMP connector, but the method does not work for the interconnection soldering of fine pitch metal pins and core wires. The publication No. CN10678577 is a patent document entitled automatic wire welding machine for connectors, and discloses a method for realizing welding and assembling of a USB2.0 connector and a wire by combining a chain type wire feeding module, a core wire cutting and stripping module, a connector feeding module, an automatic tin wire feeding assembly and a welding module on one machine, which is still not suitable for interconnection welding of micro-pitch metal pins and core wires.

SUMMERY OF THE UTILITY MODEL

The utility model provides a not enough to prior art, the utility model provides a printing opacity formula welding set of fine pitch metal Pin and heart yearn, on the solder joint of heart yearn is projected with laser through the light trap on the printing opacity subassembly, realizes the interconnection welding of fine pitch metal Pin and heart yearn, reduces actuating mechanism's required precision, avoids the damage to non-welding position.

The utility model discloses a solve above-mentioned technical problem through following technical scheme: the utility model provides a printing opacity formula welding set of fine pitch metal Pin and heart yearn, includes actuating mechanism, with the laser head that actuating mechanism is connected, its characteristics still include:

a welding jig for fixing the metal Pin and the core wire;

and the light transmission assembly is arranged above the welding fixture, a plurality of light transmission holes are formed in the light transmission assembly, the shape and the size of each light transmission hole are matched with those of welding spots on the metal pins and the core wires, and the positions of the light transmission holes correspond to those of the welding spots.

The utility model discloses a light transmission type welding device, metal pins and core wires with different intervals are matched with light transmission holes with corresponding intervals, and light transmission components with corresponding light transmission holes are replaced according to the shapes and the positions of welding spots on the metal pins and the core wires to be welded; when the laser head moves to the position above the first light transmission hole on the light transmission component under the action of the actuating mechanism, a laser beam emitted by the laser head passes through the light transmission hole and is just projected onto a welding spot of the metal Pin and the core wire, so that the metal Pin and the core wire are welded, and the laser head moves to the next light transmission hole until all the metal Pin and the core wire are welded; the device utilizes laser as a heat source, realizes the positioning between the heat source and a welding spot through the light hole, ensures that the heat source is just coincided with the welding spot so as to realize the welding of the micro-space metal Pin and the core wire, reduces the precision requirement of an executing mechanism on the moving position of a laser head, does not need to adjust the shape of a laser spot, and avoids the loss of a non-welding part (such as a chip or the core wire); due to the adoption of laser welding, no special requirement is required on the spatial position of a welding part, and the welding with narrow space of the welding part can be realized; the actuating mechanism can realize the continuous movement of the laser head, realize the rapid welding of the micro-space metal Pin and the core wire, and improve the welding efficiency.

Further, the light transmission component further comprises:

be equipped with a plurality ofly the light-passing board of light trap to and be used for supporting the support column of light-passing board.

Through the supporting action of the supporting column, the light-transmitting plate provided with the light-transmitting hole is arranged above the welding fixture.

Further, the support column is arranged on the welding fixture.

Further, the support column is a locating pin, the lower end of the locating pin is conical, and the locating pin is guided through the conical lower end, so that the light-transmitting assembly can be rapidly installed and located on the welding fixture.

Furthermore, the thickness of the light-transmitting plate is greater than 5mm, so that the light-transmitting plate loss caused by long-term irradiation of laser is avoided, and the service life of the light-transmitting component is prolonged.

Further, the welding jig includes a bottom plate, a connector fixing structure, and a core wire fixing structure; the connector fixing structure and the core wire fixing structure are detachably arranged on the bottom plate respectively;

the connector fixing structure is provided with an accommodating groove for fixing the connector; the core wire fixing structure is provided with a plurality of core wire positioning grooves for positioning the core wires; the number of the metal pins fixed on the connector in the accommodating groove is the same as that of the core wire positioning grooves.

Further, the distance between the adjacent metal pins of the connector fixed in the accommodating groove is the same as the distance between the adjacent core wire positioning grooves.

Further, the position of the metal pin of the connector fixed in the accommodation groove corresponds to the position of the core wire positioned in the core wire positioning groove.

Furthermore, an air inlet pipe is arranged on the side face of the bottom plate, a plurality of air holes are formed in the bottom plate, and the air holes are located between the adjacent metal pins; the air inlet pipe penetrates through the inner part of the bottom plate and is communicated with the air hole.

Inert gas enters the bottom plate through the gas inlet pipe and is discharged through the gas hole, and the inert gas is filled around the welding spot to protect the welding spot in the welding process.

Further, the actuating mechanism is connected with the laser head through a connecting flange.

Advantageous effects

Compared with the prior art, the light-transmitting welding device provided by the utility model comprises a welding fixture and a light-transmitting component arranged above the welding fixture, wherein a light-transmitting hole on the light-transmitting component is matched with a metal pin and a welding spot on a core wire, and a laser beam is positioned on the welding spot through the light-transmitting hole, so that the accurate welding of the micro-space metal pin and the core wire is realized, and the damage to a non-welding part is avoided; due to the positioning effect of the light-transmitting holes on the laser beam, the precision requirement of the executing mechanism on the moving position of the laser head is reduced, and the shape of a laser spot is not required to be adjusted during laser welding; the actuating mechanism can drive the laser head to move continuously, so that the metal pin and the core wire can be welded quickly, the welding efficiency is improved, and the welding with narrow welding part space can be realized; the utility model discloses a printing opacity formula welding set is with low costs, installation and easy operation, has stronger practicality.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a light-transmissive welding device according to an embodiment of the present invention;

fig. 2 is a partial enlarged view of reference numeral 7 in the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a light-transmitting assembly according to an embodiment of the present invention;

the laser welding device comprises a laser head 1, an optical fiber 101, a laser beam 102, a lens A103, a lens B104, a connecting flange 2, an actuating mechanism 3, a light-transmitting component 4, a light-transmitting plate 401, a light-transmitting hole 402, a positioning pin 403, a welding fixture 5, a bottom plate 501, a core wire positioning groove 502, a cover plate 503, an air inlet pipe 504, an air hole 505, a core wire positioning plate 506, a fastening bolt 507, a core wire 6, a cable 601, a partial enlarged view 2 7, an 8-connector, a metal pin 801, a metal chip 802, a pin 803 and a welding spot 804.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the light-transmitting welding device for a micro-space metal pin and a core wire provided by the present invention comprises an actuating mechanism 3, a laser head 1, a welding fixture 5 and a light-transmitting component 4; the actuating mechanism 3 is connected with the laser head 1 through a connecting flange 2. In the present embodiment, the actuator 3 is a robot or a machine tool in the related art, and the movement of the laser head 1 is controlled by the actuator 3. The laser head 1 comprises an optical fiber 101, a lens A103 and a lens B104, a laser beam 102 transmitted from the optical fiber 101 is focused by the lens A103 and the lens B104 and then emitted, the emitted laser beam 102 serves as a heat source to act on a core wire 6 and a metal pin 801 to form a molten pool, and after the action of the laser beam 102 is finished, a welding spot 804 is formed by cooling to realize welding. In this embodiment, the laser head 1 is a prior art.

As shown in fig. 1 and 2, the welding jig 5 includes a base plate 501, a connector fixing structure, and a core wire fixing structure; the connector fixing structure and the core wire fixing structure are detachably disposed on the bottom plate 501, respectively, and the detachable connection manner may be a screw or bolt connection. The fixing structure of the connector 8 is provided with a holding groove, the connector 8 to be welded is placed in the holding groove and fixed, the chip 802, the contact pin 803 and the metal pin 801 of the connector 8 are exposed, and one end of the connector 8 with the metal pin 801 is close to the core wire fixing structure. The core wire fixing structure comprises a core wire positioning plate 506 and a cover plate 503, a plurality of core wire positioning grooves 502 are arranged on the upper surface of the core wire positioning plate 506, a plurality of grooves matched with the core wire positioning grooves 502 are arranged on the lower surface of the cover plate 503, the sizes of the core wire positioning grooves 502 and the grooves are matched with the diameter of the core wire 6, the core wire 6 is fixed in the core wire positioning grooves 502 and the grooves, and the whole core wire fixing structure is detachably fixed on the bottom plate 501 through a fastening bolt 507.

When the connector 8 is fixed in the accommodation groove, the position, the number of the metal pins 801, and the interval between the adjacent metal pins 801 are determined, and then the corresponding core wire fixing structure is selected, the number of the core wire positioning grooves 502 and the distance between the adjacent core wire positioning grooves 502 of the core wire fixing structure are respectively matched with the number of the metal pins 801 and the distance between the adjacent metal pins 801, the core wire positioning plate 506 is installed on the bottom plate 501, the positions of the core wire positioning grooves 502 correspond to the positions of the metal pins 801 one by one, the core wire 6 is arranged in the core wire positioning groove 502, the core wire 6 is positioned on the metal pins 801, the cover plate 503 is covered to realize the fixation of the core wire 6, the position, shape and size of the welding portion on the core wire 6 and the metal pin 801 and the distance between the adjacent welding portions (i.e. the position, shape and size of the welding point 804 and the distance between the adjacent welding points 804) can be determined according to the core wire 6 and the metal pin 801.

The two side faces of the bottom plate 501 are provided with air inlet pipes 504, the bottom plate 501 is provided with a plurality of air holes 505, the air holes 505 are located between adjacent metal pins 801, the air inlet pipes 504 penetrate through the inside of the bottom plate 501 and are communicated with the air holes 505, inert gas can enter the inside of the bottom plate 501 through the air inlet pipes 504 and then is discharged through the air holes 505, and in the welding process, the inert gas is filled around each welding point 804 to protect the welding points 804.

As shown in fig. 1 and 3, the light-transmissive member 4 includes a light-transmissive plate 401, a plurality of light-transmissive holes 402 provided in the light-transmissive plate 401, and positioning pins 403; the shape and size of the light holes 402 are matched with the shape and size of the welding spots 804 on the core wire 6 and the metal pin 801, the distance between the adjacent light holes 402 is the same as the distance between the adjacent welding spots 804, then the positioning pins 403 are adopted to arrange the light-transmitting plate 401 above the welding fixture 5, so that the position of each light hole 402 corresponds to the position of each welding spot 804 one by one, and the laser beams 102 passing through the light holes 402 are just projected on the welding spots 804. In this embodiment, two positioning pins 403 are used to position the light-transmitting plate 401 and the welding fixture 5 (actually, the positioning between the light-transmitting hole 402 and the welding spot 804), the diameter of the positioning pin 403 is M5, and the lower end of the positioning pin 403 is a taper angle of 10 °, so that the light-transmitting plate 401 is quickly assembled on the welding fixture 5 by the guiding function of the taper angle, and is easy to position; the light transmission plate 401 is made of a tungsten material with a high melting point, the tungsten material is high in hardness and melting point and is not prone to corrosion, the light transmission plate is not prone to corrosion under the irradiation of laser, the service life of the light transmission assembly 4 is prolonged, in order to avoid long-term use loss of the light transmission plate 401, the thickness of the light transmission plate 401 is larger than 5mm, meanwhile, when the thickness of the light transmission plate 401 is designed, the focal length limitation of a focusing mirror and the height of the positioning pin 403 need to be considered, and the situation that the light transmission plate 401 is too thick and focal spots can act. The light-transmitting component 4 is selected according to the position and shape size of the welding point 804 on the core wire 6 and the metal pin 801, so that the laser beam 102 passing through the light-transmitting hole 402 can be just projected on the welding point 804, the core wire 6 and the metal pin 801 are accurately welded, and the damage of a non-welding part is avoided.

The utility model discloses a printing opacity formula welding set's concrete operation process does:

1. adopt connector fixed knot to construct to fix the connector on welding jig, select heart yearn fixed knot to construct according to the position of metal pin on the connector, quantity and adjacent metal pin's interval, the heart yearn passes through heart yearn fixed knot to be constructed and fixes on welding jig, heart yearn and metal pin one-to-one, and the heart yearn is located metal pin, at this moment, can confirm heart yearn and metal pin go up the position of solder joint, shape size and the interval between the adjacent solder joint.

2. Selecting a corresponding light-transmitting component according to the position and the shape size of the welding spot and the distance between the adjacent welding spots, wherein the shape size and the position of the light-transmitting hole on the light-transmitting component and the distance between the adjacent light-transmitting holes are respectively matched with or correspond to the position and the shape size of the welding spot and the distance between the adjacent welding spots, and the light-transmitting component is installed to ensure that the laser beam passing through the light-transmitting hole is just projected onto the welding spot; the laser beam is positioned to the welding spot through the light hole, so that the precision requirement of the actuating mechanism on the moving position of the laser head is reduced.

3. Setting welding process parameters, controlling the movement of the laser head by the actuating mechanism, sending a laser beam when the laser head moves to the position above the first light-transmitting hole, realizing the welding of the first welding point, moving the laser head along the axis direction of the light-transmitting hole, completing the welding of the next welding point until the welding of all welding points is completed, namely completing the welding of the connector and the core wire.

The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or modifications within the technical scope of the present invention, and all should be covered by the scope of the present invention.

Claims

1. The utility model provides a light-transmitting welding set of microspur metal pin and heart yearn, includes actuating mechanism (3), with laser head (1) that actuating mechanism (3) are connected, its characterized in that still includes:

a welding jig (5) for fixing the metal pin (801) and the core wire (6);

and the light-transmitting component (4) is arranged above the welding clamp (5), a plurality of light-transmitting holes (402) are formed in the light-transmitting component (4), the shapes and the sizes of the light-transmitting holes (402) are matched with those of welding spots (804) on the metal pin (801) and the core wire (6), and the positions of the light-transmitting holes (402) correspond to those of the welding spots (804).

2. A light-transmissive welding device as claimed in claim 1, wherein the light-transmissive component (4) further comprises: the light-transmitting plate (401) is provided with a plurality of light-transmitting holes (402), and the supporting columns are used for supporting the light-transmitting plate (401).

3. A light-transmissive welding apparatus as claimed in claim 2, wherein the support post is provided on the welding jig (5).

4. A light-transmissive welding device as set forth in claim 3, characterized in that the support posts are positioning pins (403), and the lower ends of the positioning pins (403) are tapered.

5. A light-transmissive welding device as claimed in claim 1 or 2, wherein the thickness of the light-transmissive plate (401) is greater than 5 mm.

6. A light-transmissive welding apparatus as set forth in claim 1, wherein said welding jig (5) comprises a base plate (501), a connector fixing structure and a core wire fixing structure; the connector fixing structure and the core wire fixing structure are detachably arranged on the bottom plate (501) respectively;

the connector fixing structure is provided with an accommodating groove for fixing the connector; a plurality of core wire positioning grooves (502) for positioning the core wires (6) are arranged on the core wire fixing structure; the number of metal pins (801) of the connector fixed in the accommodating groove is the same as that of the core wire positioning grooves (502).

7. An optically transmissive soldering apparatus as claimed in claim 6, wherein the pitch between adjacent metal pins (801) of the connector held in the holding groove is the same as the pitch between adjacent core positioning grooves (502).

8. An optical transmission type soldering apparatus according to claim 7, wherein a position of the metal pin (801) of the connector fixed in the housing groove corresponds to a position of the core wire (6) positioned in the core wire positioning groove (502).

9. A light-transmissive welding apparatus as claimed in claim 6, wherein an air inlet pipe (504) is provided on a side surface of the base plate (501), a plurality of air holes (505) are provided on the base plate (501), and the air holes (505) are located between adjacent metal pins (801); the air inlet pipe (504) penetrates through the inside of the bottom plate (501) and is communicated with the air hole (505).

10. A light-transmissive welding device as claimed in claim 1, characterized in that the actuator (3) is connected to the laser head (1) via a connecting flange (2).