A communication interface ultrasonic welding process and device

Abstract

The present invention discloses a communication interface ultrasonic welding process and device. By installing the product to be welded on the joint ultrasonic welding device, the communication shell and the communication joint can be quickly positioned and installed, the assembly efficiency and accuracy are improved, and the welding efficiency and the strength of the welding joint are also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic welding, and in particular to a communication interface ultrasonic welding process and device. Background Art

[0002] The working principle of ultrasonic welding is: the generator from the ultrasonic tool head emits an ultrasonic (generally 40-140KHz) signal. When the ultrasonic tool head comes into contact with the workpiece, under the action of pressure and vibration, the metal surfaces to be welded rub against each other, the oxide film is destroyed, and plastic deformation occurs, causing the two pure metal surfaces to contact closely, achieving a combination at atomic distance, and finally forming a strong mechanical connection.

[0003] The substrate of the existing data interface is made of aluminum or ceramic, and the data interface needs to be welded to the communication shell. The existing welding method requires the use of brazing flux, which will corrode the joint and pollute the environment. The existing welding process has problems such as low shear strength of the joint after welding, high melting point of the brazing material, and the need for additional pressure. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a communication interface ultrasonic welding process and device, which can quickly and accurately locate, improve welding efficiency, and increase welding yield.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a communication interface ultrasonic welding process, comprising the following steps:

[0006] 1) Pre-assembly treatment step: the products to be welded include a communication shell and a communication connector, and the welding surfaces of the communication shell and the communication connector are mechanically polished and / or ultrasonically cleaned respectively;

[0007] 2) Assembly step: installing the cleaned product to be welded on an ultrasonic welding device, which includes a processing base and an ultrasonic tool head, and includes the following sub-steps:

[0008] 2.1) Communication shell installation step: positioning and assembling the communication shell on the processing base, providing a fixing portion on the top surface of the processing base, providing a pin avoidance chamber and / or a pin insertion hole for installing the pins on the communication connector, providing a connector installation opening on the upper part of the communication shell, and installing the connector installation opening on the outer edge of the pin avoidance chamber or the outer edge of the outermost pin insertion hole;

[0009] 2.2) Communication connector installation step: the communication connector includes a substrate part and a plurality of pins. The substrate part is provided with a substrate, and each pin is respectively inserted into the substrate. The lower pins of the substrate are installed in the pin avoidance chamber or the pin jack, and the communication connector is fixed on the processing base;

[0010] 2.3) The ultrasonic tool head installation step includes: a welding part is provided at the lower part of the ultrasonic tool head, a welding cutter body is provided at the edge of the bottom of the welding part, a pin insertion cavity is provided in the middle area of ​​the bottom of the welding part, the pin insertion cavity penetrates the welding cutter body and forms a corresponding pin insertion port, the pins on the upper side of the substrate are installed in the pin insertion cavity, the ultrasonic tool head presses the substrate part, and the welding surface of the substrate part is in contact with the welding surface of the communication shell;

[0011] 3) Welding step: the ultrasonic welding device heats the product to be welded, and one or a combination of two of the heating methods selected from induction heating, resistance heating, pulse heating or resistance furnace heating is used; at least the joint installation port and the communication joint are heated, and the ultrasonic wave is transmitted to the joint installation port and the communication joint through the ultrasonic tool head, so that the substrate part and the joint installation port are ultrasonically brazed at a set welding temperature, and the heating and ultrasonic loading are stopped after 0.1-3 seconds or 20-35 seconds of ultrasonic brazing to complete the welding of the communication joint.

[0012] In a further technical solution, in the communication shell installation step 2.1), the processing base is provided with a base and a support body, the support body is provided with a support bottom and a support body, the support bottom is installed on the base, the support body is protrudingly installed on one side of the support bottom, the fixing portion is provided on the top surface of the support body, the middle portion of the communication shell is recessed inwardly to form an installation cavity, the installation cavity of the communication shell is installed on the support body, a positioning block is protrudingly provided on the fixing portion, the positioning block is provided at the assembly position of the communication connector and the communication shell, and the outer side of the positioning block is pressed against the connector installation port to fix the position of the connector installation port;

[0013] In the ultrasonic tool head installation step 2.3, a limit block is provided in the welding portion, the position of the limit block is matched with the outer shape of the substrate, the substrate is clamped and installed on the inner side of the limit block, and the installation position of the ultrasonic tool head and the substrate is determined;

[0014] In the welding step 3), the product to be welded is at least heated to a set welding temperature by the processing base and / or the ultrasonic tool head.

[0015] In a further technical solution, the material of the communication shell is selected from aluminum, copper or iron, the material of the substrate is selected from aluminum, copper, ceramic or glass, in the 2.2) communication connector installation step, the substrate portion includes a soldering filler metal, the pins are inserted into the substrate, the substrate is provided with a soldering filler metal on one side facing the connector installation port, a through groove is provided in the middle of the soldering filler metal, the pins on one side of the substrate pass through the through groove and are inserted into the pin avoidance chamber or the pin insertion hole, and the two sides of the soldering filler metal are respectively against the soldering surface of the substrate and the soldering surface of the connector installation port;

[0016] When the substrate is made of ceramic or glass, a metal connection layer is electroplated on the surface of the substrate, and the metal connection layer is arranged between the substrate and the solder;

[0017] In the welding step 3), the welding temperature is set at 200-350°C, the substrate is connected to the joint installation port by welding solder, heating and ultrasound are stopped, the product to be welded is cooled to room temperature, and welding is completed.

[0018] In a further technical solution, the ultrasonic welding device selects pulse heating as a heating method or one of the heating methods, the ultrasonic tool head and / or the processing base is provided with a pulse heating device for pulse heating the product to be welded, and the ultrasonic tool head applies ultrasonic action to the product to be welded for 0.1-3 seconds;

[0019] When the ultrasonic welding device uses electromagnetic induction heating, built-in resistance heating or resistance furnace heating as one of the heating methods or a combination of the two, the ultrasonic tool head applies ultrasonic action to the product to be welded for 20-35 seconds;

[0020] In the welding step 3), the ultrasonic frequency is set at 20-60k, the ultrasonic amplitude is set at 5-30μm, the ultrasonic power is controlled at 10-100W, the ultrasonic frequency is controlled at 20-60kHz, the product to be welded is heated to the welding temperature by heating the processing base and / or the ultrasonic tool head, the temperature of the product to be welded is reduced to room temperature, and the communication joint is welded.

[0021] In a further technical solution, when the ultrasonic welding device adopts a pulse heating method, a pulse heating device is arranged on the ultrasonic tool head and / or the processing base, and the pulse heating device includes a heating conductor and a conductive metal group. A conductive metal group is formed by two mutually insulated metal bodies. The heating conductor is electrically connected to the two metal bodies in the conductive metal group, respectively. The two metal bodies in the conductive metal group are electrically connected to a pulse power supply, respectively. The heating conductor, the conductive metal group and the pulse power supply are connected in series to form a pulse current loop. The heating conductor transfers heat to the product to be welded during welding.

[0022] In a further technical solution, the heating conductor is in contact with the ultrasonic tool head, and the heating conductor is provided with two conductive mounting parts, and the two conductive mounting parts are respectively fixed in series with two metal bodies in the same pulse current loop.

[0023] In a further technical solution, the ultrasonic welding device adopts a combined heating method of pulse heating and resistance heating, one of the ultrasonic tool head and the processing base adopts pulse heating, and the other adopts resistance heating, one of the ultrasonic tool head and the processing base is provided with the pulse heating device, and the other is provided with a resistance heating device.

[0024] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a communication interface ultrasonic welding device, an ultrasonic tool head and a processing base for respectively fixing a communication shell and a communication connector, the communication connector is provided with a substrate and a plurality of pins, each pin is respectively inserted into the substrate, the processing base is provided with a fixing portion, the fixing portion is provided with a pin avoidance chamber and / or a pin jack for inserting the pins, a welding portion is provided at the lower part of the ultrasonic tool head, a welding knife body is provided at least at the outer edge of the bottom of the welding portion, and a pin insertion cavity is provided at least in the middle area of ​​the bottom of the welding portion, the pin insertion cavity penetrates the welding knife body and forms a corresponding pin insertion port.

[0025] In a further technical solution, the processing base is provided with a base and a support body, the support body is provided with a support bottom and a support body, the support bottom is installed on the base, the support body is protrudingly installed on one side of the support bottom, and the fixing part is provided on the top surface of the support body;

[0026] The fixing portion is protrudingly provided with a positioning block, and the positioning block is arranged at the assembly position of the communication connector and the communication shell;

[0027] The welding portion is provided with a limiting block, the position of the limiting block is matched with the outer shape of the substrate, and the substrate is clamped on the inner side of the limiting block;

[0028] The upper part of the fixing part is provided with the pin avoidance chamber, and the pin avoidance chamber is provided with the pin insertion hole corresponding to the pin position.

[0029] In a further technical solution, a soldering filler metal is provided at the bottom of the communication connector, a through groove is provided in the middle of the soldering filler metal, the shape of the soldering filler metal is adapted to the shape of the outer edge of the substrate, the pin is installed in the through groove, the positioning block is inserted into the communication shell, the positioning block is pressed against the inner side of the through groove, and the outer side of the substrate is pressed against the limit block;

[0030] The fixing part is provided with a plurality of the pin insertion holes, and the outer sides of the outermost pin insertion holes are connected to form a insertion hole area, and the positioning block is arranged outside the insertion hole area;

[0031] The pin insertion hole is provided with a set depth, and after the pin is inserted into the pin insertion hole, the top surface of the soldering material abuts against the substrate, and the bottom surface of the soldering material abuts against the communication shell;

[0032] The positioning block has a set height, and the positioning block is inserted into the communication shell and extends into the through slot;

[0033] The communication shell has a protruding column on one side facing the supporting body, and the supporting body is provided with a clearance hole, the setting position of the clearance hole corresponds to the position of the protruding column;

[0034] The top surface of the positioning block is provided with a guiding inclined surface;

[0035] The communication shell is provided with a connector installation opening, the connector installation opening and the substrate are both rectangular, the connector installation opening and the substrate are adapted in shape and size, at least two positioning blocks are provided, the positioning blocks are respectively arranged at positions corresponding to the four corners of the connector installation opening, wherein the two positioning blocks are located at both ends of the same diagonal line of the connector installation opening, and the outer sides of the positioning blocks are against the connector installation opening;

[0036] At least two limit blocks are provided, and the positions of the limit blocks are respectively set at the corresponding positions of the four corners of the substrate, wherein the two limit blocks are located at the two ends of the same diagonal line of the substrate, and the inner sides of the limit blocks are against the side surfaces of the substrate;

[0037] The shape of the pin insertion cavity covers a range larger than the range of the shape formed by the outer side connecting lines of all the pins located at the outermost side, and the pin insertion cavity is provided with a set depth. When the ultrasonic tool head is abutted against the substrate, the set depth of the pin insertion cavity is greater than or equal to the length of the pin inserted into the pin insertion cavity;

[0038] The processing base and / or the ultrasonic tool head are provided with a heating element, which is selected from a resistive heating wire, a pulse current induction coil or a pulse current loaded on the processing base, and the resistive heating wire and the pulse current induction coil are installed inside or on the surface of the processing base;

[0039] The ultrasonic welding device comprises an ultrasonic generating device and an ultrasonic frequency conversion rod. The ultrasonic generating device is electrically connected to the ultrasonic frequency conversion rod, and the ultrasonic tool head is installed at the lower part of the ultrasonic frequency conversion rod.

[0040] After adopting the above structure, the advantages of the present invention compared with the prior art are:

[0041] 1. The present invention uses an ultrasonic welding device to quickly install and position the communication shell and the communication connector, effectively improving the assembly accuracy and efficiency.

[0042] 2. The present invention uses an ultrasonic welding device to perform ultrasonic heating welding on the product to be welded. The product to be welded is quickly heated in a short time, avoiding the problem of poor airtightness caused by oxidation of the solder during the heating process. Under the action of ultrasound, the welding reaction of the product to be welded is complete, avoiding the generation of brittle tissue, and obtaining a welded joint with high shear strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0044] Figure 1 It is a structural schematic diagram of the present invention.

[0045] Figure 2It is a structural schematic diagram of the ultrasonic tool head of the present invention.

[0046] Figure 3 It is a structural schematic diagram of the communication shell of the present invention.

[0047] Figure 4 It is a structural schematic diagram of the processing base of the present invention.

[0048] Figure 5 It is a structural schematic diagram of the communication connector of the present invention.

[0049] Figure 6 It is a cross-sectional view of the installation structure of the present invention.

[0050] Figure 7 The present invention Figure 6 Enlarged view of point A.

[0051] Figure 8 It is a schematic structural diagram of the welding filler metal of the present invention.

[0052] Fig. 9 It is the basic circuit diagram of the pulse circuit discharge of the present invention.

[0053] Fig.10 is Formula 1 of the present invention.

[0054] Fig.11 It is formula 2 of the present invention.

[0055] Fig.12 It is the formula of the discharge power of the present invention.

[0056] Fig.13 It is a schematic structural diagram of a pulse heating device of the present invention installed on an ultrasonic welding device.

[0057] Fig.14 It is a schematic structural diagram of the pulse heating device of the present invention.

[0058] In the figure: 10-communication shell, 11-connector installation port, 12-protruding column;

[0059] 20-communication connector, 21-substrate, 22-pin, 23-soldering material, 24-through slot;

[0060] 30-processing base, 31-fixing part, 32-pin jack, 33-positioning block, 34-base, 35-support bottom, 36-support body, 37-allowance hole;

[0061] 40-ultrasonic tool head, 41-welding portion, 42-pin insertion cavity, 43-limiting block;

[0062] 50 - pulse heating device, 51 - metal body, 52 - conductive mounting portion, 53 - heating conductor. DETAILED DESCRIPTION

[0063] The following are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

[0064] A communication interface ultrasonic welding process, Figure 1-Figure 14 As shown, the following steps are included:

[0065] 1) Pre-assembly treatment steps: the products to be welded include a communication shell 10 and a communication connector 20; the products to be welded are 5G communication shells 10; the communication shells 10 are 5G communication shells 10; the communication connectors 20 are 5G communication connectors 20; the welding surfaces of the communication shells 10 and the communication connectors 20 are mechanically polished and / or ultrasonically cleaned respectively; specifically, the welding surfaces of the communication shells 10 and the communication connectors 20 are polished respectively with 400-1500 mesh sandpaper; the communication shells 10 and the communication connectors 20 are placed in a 90-100% acetone solution and ultrasonically cleaned using a cleaning ultrasonic wave for 10-20 minutes to remove impurities on the welding surfaces of the communication shells 10 and the communication connectors 20; the cleaning ultrasonic wave refers to the ultrasonic wave generated by the ultrasonic generator and transmitted to the ultrasonic tool head 40 and the ultrasonic wave of the cleaning tank.

[0066] 2) Assembly step: Install the cleaned product to be welded on the ultrasonic welding device, which includes a processing base 30 and an ultrasonic tool head 40, and install the product to be welded between the processing base 30 and the ultrasonic tool head 40 for welding. Specifically, the processing base 30 and the ultrasonic tool head 40 are made of metal.

[0067] Since the pin 22 is inserted from one side of the substrate 21 and extends out to the other side of the substrate 21, the communication connector 20 is welded to the communication shell 10, that is, the edge of the substrate 21 of the communication connector 20 is welded to the connector installation port 11 of the communication shell 10, which specifically includes the following sub-steps:

[0068] 2.1) Communication shell installation step: Position and assemble the communication shell 10 on the processing base 30. A fixing portion 31 is provided on the top surface of the processing base 30. A pin avoidance chamber and / or a pin insertion hole 32 for installing the pins 22 on the communication connector 20 is provided on the fixing portion 31. A connector installation opening 11 is provided on the upper part of the communication shell 10. The connector installation opening 11 is installed on the outer edge of the pin avoidance chamber or the outer edge of the outermost pin insertion hole 32. The communication shell 10 is located below the communication connector 20, so the communication shell 10 is installed first. The pin avoidance chamber or pin hole 32 set in the fixing portion 31 is used to fix the communication connector 20. The pin 22 on one side of the communication connector 20 needs to be inserted into the pin avoidance chamber or pin hole 32. Therefore, the connector mounting port 11 is installed around the pin avoidance chamber or pin hole 32. The hollow part of the connector mounting port 11 leaks out the pin avoidance chamber or pin hole 32, so that the pin 22 of the communication connector 20 can be inserted into the pin avoidance chamber or pin hole 32 after the communication shell 10 is fixed on the processing base 30.

[0069] Specifically, in step 2.1) of installing the communication shell 10, the processing base 30 is provided with a base 34 and a support body, the support body is provided with a support bottom 35 and a support body 36, the support body 36 is fixed to the support bottom 35, the support bottom 35 is installed on the base 34, the support body 36 is protrudingly provided on one side of the support bottom 35, the fixing portion 31 is provided on the top surface of the support body 36, the middle part of the communication shell 10 is recessed inwardly to form an installation cavity, the installation cavity of the communication shell 10 is installed on the support body 36, and a fixing portion 31 is provided on the fixing portion 31. Position block 33, the positioning block 33 is set at the assembly position of the communication connector 20 and the communication shell 10, and the outer side of the positioning block 33 is pressed against the connector installation port 11 to fix the position of the connector installation port 11; due to the special shapes of the communication shell 10 and the communication connector 20, the assembly position of the communication shell 10 and the communication connector 20 cannot be accurately fixed by a general clamp, so that the communication shell 10 and the communication connector 20 are easily displaced during the welding process, and the assembly position between the communication shell 10 and the communication connector 20 changes, resulting in a high welding defect rate. The support body 36 is protrudingly installed on the support bottom 35, and the middle part of the communication shell 10 is recessed inward to form an installation cavity. The shape of the support body 36 matches the shape of the installation cavity. The support body 36 is embedded in the installation cavity and is clamped in the connector installation port 11 by the positioning block 33, so that the communication shell 10 is fixedly installed on the outside of the processing base 30. The processing base 30 is provided with a pin avoidance chamber or a pin insertion hole 32, and the processing base 30 is also provided with a positioning block 33. The position between the positioning block 33 and the pin avoidance chamber, or the positioning block 33 and the pin insertion hole 32 is set according to the assembly position between the communication shell 10 and the communication connector 20. The position of the communication connector 20 on the processing base 30 is determined by the pin avoidance chamber or the pin insertion hole 32, and the installation position of the communication shell 10 on the processing base 30 is determined by the positioning block 33, thereby fixing the assembly position between the communication shell 10 and the communication connector 20. More specifically, the outer sides of the positioning blocks 33 are respectively against the connector installation opening 11, thereby fixing the position of the communication shell 10.

[0070] 2.2) The steps of installing the communication connector 20. The communication connector 20 includes a substrate 21 and a plurality of pins 22. The substrate 21 is provided with a substrate 21. Each pin 22 is respectively inserted into the substrate 21. The lower pins 22 of the substrate 21 are installed in the pin avoidance chamber or the pin insertion hole 32, and the communication connector 20 is fixed on the processing base 30. The pins 22 on the lower side of the substrate 21 are inserted into the pin avoidance chamber or the pin insertion hole 32 to determine the welding position of the communication connector 20 and the communication shell 10, and the welding surface of the substrate 21 is in contact with the welding surface of the communication shell 10.

[0071] More specifically, the material of the communication shell 10 is aluminum, copper or iron, and the material of the substrate 21 is aluminum, copper, ceramic or glass. In the step 2.2) of installing the communication connector 20, the substrate 21 includes a soldering filler metal 23, and the pins 22 are inserted into the substrate 21. The side of the substrate 21 facing the connector installation port 11 is provided with a soldering filler metal 23, and a through groove 24 is provided in the middle of the soldering filler metal 23. The pins 22 on one side of the substrate 21 pass through the through groove 24 and are inserted into the pin avoidance chamber or the pin insertion hole 32. The two sides of the soldering filler metal 23 are respectively pressed against the soldering surface of the substrate 21 and the soldering surface of the connector installation port 11. The substrate 21 and the communication shell 10 are pressed against each other by the soldering filler metal 23 to prepare for the subsequent soldering steps.

[0072] When the substrate 21 is made of ceramic or glass, a metal connection layer is electroplated on the surface of the substrate 21, and the metal connection layer is arranged between the substrate 21 and the solder 23. The metal connection layer is made of metal, and the metal connection layer is preferably nickel. Preferably, the surface of the substrate 21 is electroplated with a metal connection layer, and the metal connection layer is made of nickel metal.

[0073] 2.3) The ultrasonic tool head 40 installation steps are as follows: a welding portion 41 is provided at the lower portion of the ultrasonic tool head 40, a welding blade body is provided at the edge of the bottom of the welding portion 41, a pin insertion cavity 42 is provided in the middle area of ​​the bottom of the welding portion 41, the pin insertion cavity 42 penetrates the welding blade body and forms a corresponding pin 22 insertion port, the pin 22 on the upper side of the substrate 21 is installed in the pin insertion cavity 42, the ultrasonic tool head is pressed against the substrate 21, specifically, the welding blade body is pressed against the substrate 21, and the welding surface of the substrate 21 is pressed against the welding surface of the communication shell 10; since the pin 22 protrudes from the upper portion of the communication connector 20, a pin insertion cavity 42 is provided on the ultrasonic tool head 40, the position of the pin insertion cavity 42 corresponds to the position of the protruding pin 22 on the upper portion of the communication connector 20, the pin 22 is inserted into the pin insertion cavity 42, the welding blade body is pressed against the top surface of the substrate 21, and the action position of the ultrasonic tool head is aligned with the welding position of the substrate 21 and the connector installation port 11.

[0074] Specifically, in 2.3), in the ultrasonic tool head 40 installation step, a limit block 43 is set in the welding part 41, and the position setting of the limit block 43 matches the outer shape of the substrate 21. The substrate 21 is installed on the inner side of the limit block 43, and the installation position of the ultrasonic tool head 40 and the substrate 21 is determined. After the communication shell 10 installation step and the communication connector 20 installation step, the communication shell 10 and the communication connector 20 have been installed on the processing base 30, that is, fixed according to the assembly position of the communication shell 10 and the communication connector 20, and then the ultrasonic tool head 40 is installed on the product to be welded, that is, the installation before welding is completed. The position setting of the limit block 43 matches the outer shape of the substrate 21, and the substrate 21 is installed on the inner side of the limit block 43, and the position between the ultrasonic tool head 40 and the substrate 21 is further determined, that is, the effective welding position of the ultrasonic tool head 40 and the product to be welded is further determined.

[0075] 3) Welding step: The ultrasonic welding device heats the product to be welded, and one or a combination of two of the heating methods of induction heating, resistance heating, pulse heating or resistance furnace heating is selected; at least the joint installation port 11 and the communication joint 20 are heated, and the ultrasonic wave is transmitted to the joint installation port 11 and the communication joint 20 through the ultrasonic tool head, so that the substrate 21 part and the joint installation port 11 are ultrasonically brazed at the set welding temperature, and the heating and ultrasonic loading are stopped after 0.1-3 seconds or 20-35 seconds of ultrasonic brazing, and the welding of the communication joint 20 is completed. The ultrasonic tool head emits ultrasonic waves to act on the welding position of the substrate 21 part and the joint installation port 11, so that the substrate 21 part and the joint installation port 11 are welded and connected. This ultrasonic welding device selects one or a combination of two of the heating methods of induction heating, resistance heating, pulse heating or resistance furnace heating. A heating device corresponding to the heating methods of induction heating, resistance heating, pulse heating or resistance furnace heating is provided in the ultrasonic tool head 40 or the processing base 30. The ultrasonic tool head 40 and the processing base 30 are respectively provided with heating devices corresponding to the same or different heating methods. The heating device corresponding to the heating method is an induction heating device corresponding to the induction heating method, a built-in resistance heating device corresponding to the built-in resistance heating method, a pulse heating device 50 corresponding to the pulse heating method, and a resistance furnace heating device corresponding to the resistance furnace heating method. Among them, the resistance heating method includes external resistance heating and built-in resistance heating.

[0076] The solder 23 is made of zinc or aluminum, and the ultrasonic welding device heats the product to be welded to the welding temperature. The ultrasonic tool head 40 applies ultrasonic waves to the product to be welded. Under the combined action of the welding temperature and the ultrasonic wave, the solder 23 melts during the welding process, and the solder 23 reacts quickly with the substrate 21 and the communication shell 10 to produce eutectic compounds, thereby welding the communication connector 20 and the communication shell 10 under the action of ultrasound. The welding temperature refers to the melting point of the solder 23, or the eutectic temperature of the materials between the communication shell 10, the solder 23 and the substrate 21. Among them, when the substrate 21 is made of glass or ceramic, a metal connection layer is electroplated on the surface of the substrate 21, and the material of the metal connection layer is nickel. When the heating temperature reaches the welding temperature, the metal connection layer, the solder 23 and the communication shell 10 undergo a metallurgical chemical reaction to form a welding joint, thereby connecting the communication connector 20 and the communication shell 10.

[0077] Specifically, in step 3), welding, the product to be welded is heated to at least the set welding temperature by the processing base 30 and / or the ultrasonic tool head 40. A thermocouple is provided between the ultrasonic tool head 40 and the processing base 30, and the heating temperature of the product to be welded is measured by the thermocouple. The ultrasonic tool head 40 and / or the processing base 30 are provided with a heating device, wherein when heating the product to be welded, the product to be welded can be heated by the heating device in the processing base 30 and / or the ultrasonic tool head 40. Preferably, the processing base 30 and the ultrasonic tool head 40 heat the product to be welded at the same time, so that the heating of the product to be welded as a whole is more uniform, and the heating efficiency is higher. The heating device is selected from the heating methods of induction heating, resistance heating, pulse heating or resistance furnace heating.

[0078] In the welding step 3), the welding temperature is set at 200-350°C, the ultrasonic tool head 40 applies ultrasonic waves to the product to be welded, and the substrate 21 and the joint installation port 11 are welded through the welding solder 23, and the heating and ultrasonic waves to the product to be welded are stopped, and the product to be welded is cooled to room temperature, and the welding is completed. The welding solder 23 is made of zinc or aluminum, and the welding temperature reaches the melting point of the welding solder 23, or the welding temperature reaches the eutectic temperature of the materials of the substrate 21, the welding solder 23 and the communication shell 10, and the welding solder 23 melts, thereby forming a eutectic compound joint.

[0079] More specifically, in step 3), the ultrasonic frequency is set at 20-60k, the ultrasonic amplitude is set at 5-30μm, the ultrasonic power is controlled at 10-100W, the ultrasonic frequency is controlled at 20-60kHz, the product to be welded is heated to the welding temperature by heating the processing base 30 and / or the ultrasonic tool head, the temperature of the product to be welded is reduced to room temperature, and the communication connector 20 is welded.

[0080] The ultrasonic welding device uses pulse heating as at least one of the heating methods. The ultrasonic tool head 40 and / or the processing base 30 are provided with a pulse heating device 50 for pulse heating the product to be welded. The ultrasonic tool head 40 applies ultrasonic action to the product to be welded for a time of 0.1-3 seconds. The ultrasonic welding device uses pulse heating to heat the product to be welded. The pulse heating has a fast heating rate, which reaches 200°C / second. The pulse heating temperature control is accurate, and the corresponding heating temperature is obtained by controlling the current value of the pulse heating device 50. The basic circuit of the pulse circuit discharge is: Fig. 9 , Figures 10 to 12 is the calculation formula between pulse current, resistance and temperature, where: Fig.12 is the discharge power formula, Fig.10 In the formula of -xx12, P is the welding line energy (k J / mm); η is the heat source effectiveness coefficient, which is 0.9 in this test; U is the actual arc voltage (V); I is the actual welding current during welding (A); V h is the welding speed (mm / s), V P and V r is the voltage at different times.

[0081] When the ultrasonic welding device selects electromagnetic induction heating, built-in resistance heating or resistance furnace heating as one of the heating methods or a combination of the two, the ultrasonic tool head 40 applies ultrasonic action to the product to be welded for 20-35 seconds; the heating rate using electromagnetic induction heating, built-in resistance heating or resistance furnace heating reaches 94-135°C / second.

[0082] The product to be welded is heated before welding. The heating rate affects the formation of the metallurgical chemical reaction. The heating device can reach the welding temperature in a sufficiently short time, so that the welding brazing material 23 melts quickly and forms a eutectic compound joint with the welding base material. During the welding process, the welding brazing material 23 can be prevented from being oxidized during the heating process, which causes poor air tightness. At the same time, the heating efficiency is high. After the temperature is stable, under the action of ultrasound, the metallurgical chemical reaction is violent and complete, and no excess brazing material will remain, thereby avoiding the formation of brittle tissue, so that the shear strength of the joint tissue obtained by welding is stronger. The heat generated by the heating device is transmitted to the product to be welded through the metal processing base 30 and the ultrasonic tool head 40.

[0083] More specifically, when the ultrasonic welding device adopts the pulse heating method, a pulse heating device 50 is provided on the ultrasonic tool head 40 and / or the processing base 30, such as Figure 13 to Figure 14As shown, the pulse heating device 50 includes a heating conductor 53 and a conductive metal group. A conductive metal group is composed of two mutually insulated metal bodies 51. The heating conductor 53 is electrically connected to the two metal bodies 51 in the conductive metal group respectively. The two metal bodies 51 in the conductive metal group are electrically connected to the pulse power supply respectively. The heating conductor 53, the conductive metal group and the pulse power supply are connected in series to form a pulse current loop. The heating conductor 53 conducts heat to the product to be welded during welding. In the same conductive metal group, one of the metal bodies 51 is connected to the positive pole of the pulse power supply, and the other metal body 51 is connected to the negative pole of the pulse power supply. When the pulse power supply is turned on, a large current passes through the heating conductor 53 in the pulse current loop, causing the heating conductor 53 to form a short circuit and heat up quickly. The heat generated by the heating conductor 53 is conducted through the contact position with the product to be welded, causing the product to be welded to heat up quickly, the welding brazing material 23 melts, and the ultrasonic wave acts on the product to be welded to achieve welding.

[0084] The heating conductor 53 is in contact with the ultrasonic tool head 40, and is provided with two conductive mounting parts 52. The two conductive mounting parts 52 are respectively fixed in series with the two metal bodies 51 in the same pulse current loop. The heating conductor 53 is provided with a heating part, which is in contact with the product to be welded, and the heating part is connected to the two conductive mounting parts 52. The conductive cross-section of the metal body 51 is at least 5-50 times the conductive cross-section of the conductive mounting part 52, and the conductive cross-section of the metal body 51 is at least 10-200 times the conductive cross-section of the heating part. Since the conductive cross-section of the metal body 51 is several times the conductive interface of the heating part, when the current passes through the heating part, the temperature of the heating part rises rapidly, and a large amount of heat is generated at the same time, and the heat is conducted to the product to be welded, thereby heating the product to be welded. Specifically, the heat of the heating part is conducted to the welding brazing material 23 through the metal processing base 30 or the ultrasonic tool head 40, so that the welding brazing material 23 melts.

[0085] Preferably, the ultrasonic welding device uses a combined heating method of pulse heating and resistance heating. One of the ultrasonic tool head 40 and the processing base 30 uses a pulse heating method, and the other uses a resistance heating method, that is, a pulse heating device 50 is provided in one of the ultrasonic tool head 40 and the processing base 30, and a resistance heating device is provided in the other. The heating efficiency of the pulse heating device 50 is particularly high, and it is costly to install the pulse heating device 50 in both the ultrasonic tool head 40 and the processing base 30. The pulse heating method is provided in one of the ultrasonic tool head 40 and the processing base 30, and the other uses a built-in resistance heating device, which has high heating efficiency, low cost, good heating effect, and uniform heating of the product to be welded.

[0086] Preferably, the ultrasonic welding device uses a heating method that combines pulse heating and built-in resistance heating. The ultrasonic tool head 40 uses pulse heating, and the processing base 30 uses resistance heating. A pulse heating device 50 is provided on the ultrasonic tool head 40, and a built-in resistance heating device is provided inside the processing base 30. The processing base 30 uses a heat-conducting material, such as metal. A heating cavity is provided in the upper area inside the processing base 30, and a heating element is installed in the heating cavity adjacent to the fixed portion 31. The processing base 30 is provided with a wire outlet hole, which is connected to the heating cavity. The heating element uses a resistive heating element, and the heating element is provided with two wiring parts, which extend to the outside of the processing base 30 through the wire outlet hole, and the power supply is electrically connected to the wiring parts respectively. The gap between the heating element and the heating cavity is filled with an insulating, heat-conducting powder filling medium. When the heating element is powered on, the heating element generates heat. The heat generated by the heating element after being powered on is directly conducted to the fixed part 31 through the heating base. The heat conduction speed is fast. The built-in heating method is adopted. The heating element is built into the heating cavity. This structure can greatly reduce the heat loss. The heat loss during the heating process is smaller. The heating speed is fast and the cooling speed is fast. The welding efficiency is improved and the energy consumption is reduced. In the existing external heating element, the operator is easily scalded by operating errors. In the built-in resistance heating device, the heating element is installed in the heating cavity. The safety factor is high and the operator is not easily scalded. The current is connected from the outside through the wire, and the current is loaded on the heating element. The heat is conducted to the fixed part 31 adjacent to the heating cavity through the processing base 30, and the heat is conducted to the product to be welded through the fixed part 31. The heat is directly conducted to the fixed part 31 through the processing base 30, and the heat conduction medium and the conduction distance are reduced. Therefore, the heating speed of the fixed part 31 to the product to be welded is fast, and the cooling speed is fast, which improves the welding efficiency and reduces the energy consumption. The existing external heating structure has large heat energy loss and high energy consumption. There is a large lag in the heating temperature control of the components to be welded, and the heating speed is slow and the cooling speed is slow. The built-in resistance heating device is small in size, does not require the installation of an external cooling device, has a simple structure and low cost.

[0087]

[0088] Table 1.1 Comparison of data obtained by using different heating methods in the present invention.

[0089] The average time for ultrasonic welding of a product to be welded is the time for the ultrasonic tool head 40 to apply ultrasound to the product to be welded.

[0090] Average heating efficiency: the average value of the heating efficiency of the heating device when heating the product to be welded to the welding temperature.

[0091] Average joint strength: the average shear strength of the joint obtained by welding the products to be welded using a certain heating method.

[0092] Good product rate: the welding pass rate of the communication shell 10 and the communication connector 20.

[0093] The first group of ultrasonic welding devices are existing ultrasonic welding devices, and the heating method of this group of ultrasonic welding devices is an exposed resistance heating method.

[0094] The second group of ultrasonic welding devices adopts a heating method of electromagnetic induction heating, built-in resistance heating or resistance furnace heating, or a heating method using a combination of the two.

[0095] The third group of ultrasonic welding devices adopts a pulse heating method, and the ultrasonic tool head 40 and / or the processing base 30 are provided with a pulse heating device 50 .

[0096] As shown in Table 1.1, the present invention can quickly position the communication shell 10 and the communication connector 20 between the processing base 30 and the ultrasonic tool head 40 because the pin jack 32, the positioning block 33, the limit block 43 and other positioning components are provided on the processing base 30. Compared with the existing ultrasonic welding device, each welding of a product to be welded can save an average of 27 seconds of operation and fixing time, improve the assembly efficiency between the communication shell 10 and the communication connector 20 before welding, and also improve the installation efficiency of the product to be welded on the welding device, while improving the overall assembly accuracy. Since the fixed position between the communication shell 10 and the communication connector 20 is accurate and it is guaranteed that there will be no displacement between them during the welding process, the yield rate is relatively high compared to the prior art.

[0097] Since the ultrasonic welding device adopts electromagnetic induction, resistance heating, pulse heating or resistance furnace heating, a metallurgical chemical reaction occurs between the communication shell 10 and the communication connector 20 during the welding process, thereby avoiding the production of brittle tissue, thereby making the shear strength of the welded joint tissue stronger, among which the welded joint obtained by pulse heating has the strongest shear strength. Since the pulse heating method has the fastest heating rate for the product to be welded, the shear strength of the joint is also the highest.

[0098] A communication interface ultrasonic welding device, Figures 1 to 8 As shown, an ultrasonic tool head 40 and a processing base 30 for respectively fixing the communication shell 10 and the communication connector 20, the communication connector 20 is provided with a substrate 21 and a plurality of pins 22, each pin 22 is respectively inserted into the substrate 21, the processing base 30 is provided with a fixing portion 31, the fixing portion 31 is provided with a pin avoidance chamber and / or a pin insertion hole 32 for inserting the pin 22, the lower part of the ultrasonic tool head 40 is provided with a welding portion 41, at least a welding knife body is provided at the outer edge of the bottom of the welding portion 41, and a pin insertion cavity is provided at least in the middle area of ​​the bottom of the welding portion 41, and the pin insertion cavity passes through the welding knife body and forms a corresponding pin insertion port.

[0099] A connector installation port 11 is provided in the communication shell 10, and the communication connector 20 needs to be welded to the connector installation port 11. Since the communication shell 10 is made of an extruded or die-cast alloy material, a large number of pores and loose structures are formed and remain inside the extruded or die-cast aluminum alloy during the processing, resulting in an inability to weld, or air leakage after welding. In view of the characteristics of the extruded or die-cast aluminum alloy, a low-temperature flux-free ultrasonic welding method is required to achieve welding. Due to the particularity of the connector installation port 11 of the communication shell 10, an ultrasonic welding device is required for auxiliary welding, thereby achieving welding of the communication connector 20 and the communication shell 10, improving welding quality, and improving welding efficiency.

[0100] More specifically, the fixing portion 31 is provided with a protruding positioning block 33, which is arranged at the assembly position of the communication connector 20 and the communication shell 10, the welding portion 41 is provided with a limiting block 43, the position of the limiting block 43 is matched with the outer shape of the substrate 21, the substrate 21 is clamped on the inner side of the limiting block 43, and the upper part of the fixing portion 31 is provided with a pin avoidance chamber, and the pin avoidance chamber is provided with a pin jack 32 corresponding to the position of the pin 22. The ultrasonic welding device of the present invention is mainly composed of an ultrasonic tool head 40 and a processing base 30, the communication shell 10 and the communication connector 20 are fixed to the processing base 30, the communication connector 20 is pressed against the communication shell 10 by the ultrasonic tool head 40, the communication shell 10 and the communication connector 20 are heated by the processing base 30, and the communication shell 10 and the communication connector 20 are welded by the ultrasonic emitted by the ultrasonic tool head 40. A fixing portion 31 is provided on the processing base 30, and a pin insertion hole 32 is provided on the fixing portion 31. The pin 22 located at the lower part of the substrate 21 is inserted into the pin insertion hole 32 to fix the communication connector 20. At the same time, the assembly position of the communication shell 10 and the communication connector 20 is fixed by inserting the positioning block 33 into the connector installation port 11. Specifically, by setting the positioning block 33 at a plurality of key positioning points, the outer side of the positioning block 33 abuts against the side of the connector installation port 11, and the communication shell 10 is fixed at the assembly position with the communication connector 20. The assembly position of the communication connector 20 and the connector installation port 11 refers to fixing the position of the connector installation port 11 through one or more points at different positions, thereby determining the assembly position of the connector installation port 11 and the communication connector 20. The ultrasonic tool head 40 is provided with a welding portion 41, and the welding portion 41 is provided with a pin insertion cavity. Since the pin 22 of the communication connector 20 is inserted into the substrate 21, the middle part of the pin 22 is fixed to the substrate 21, and the two ends of the pin 22 pass through the upper and lower sides of the substrate 21. The pin 22 on the lower side of the substrate 21 is inserted into the pin jack 32 or the pin avoidance chamber, and the pin 22 on the upper side of the substrate 21 is inserted into the pin insertion cavity. A plurality of limit blocks 43 are set on the ultrasonic tool head 40, and the substrate 21 is clamped on the inner side of the limit block 43, so as to fix the action position of the ultrasonic tool head 40. Since the assembly position of the communication connector 20 and the communication shell 10 has been determined by the processing base 30, the ultrasonic tool head 40 is positioned with the communication connector 20 through the limit block 43 to determine the action position of the ultrasonic tool head 40. The assembly position and action position of the ultrasonic tool head 40, the communication shell 10, the communication connector 20 and the processing base 30 are fixed by the limit block 43, the pin jack 32 and the positioning block 33. The multiple aspects of the limit fixation of the assembly position between the communication connector 20 and the communication shell 10 improve the assembly welding accuracy between the communication connector 20 and the communication shell 10, ensure the normal welding of the communication connector 20 and the communication shell 10, and help to improve the welding quality and improve the welding efficiency.The assembly and fixing method among the ultrasonic tool head 40, the communication shell 10, the communication connector 20 and the processing base 30 is simple and easy to operate, and at the same time helps to shorten the operation time and improve the work efficiency.

[0101] The processing base 30 is provided with a base 34 and a support body, and the support body is provided with a support bottom 35 and a support body 36. The support bottom 35 is installed on the base 34, and the support body 36 is protrudingly installed on one side of the support bottom 35. The fixing part 31 is arranged on the top surface of the support body 36. The base 34 is used to fix the support body. The base 34 is a bottom plate with a certain width, so that the support body is vertically installed on the base 34. The connector installation port 11 is arranged on the top of the communication shell 10. The communication shell 10 is a shell with a hollowed-out middle part. The support body 36 is protrudingly installed on the support bottom 35. The support body 36 is inserted into the hollowed-out part of the shell of the communication shell 10. The connector installation port 11 is placed on the fixing part 31, so that the communication shell 10 is fixed on the support body. The structure of the support body 36 protruding from the support bottom 35 is convenient for installing the communication shell 10, easy to operate, and improves work efficiency. At the same time, the support body 36 is embedded in the hollowed-out part of the shell of the communication shell 10, so that the fixation of the communication shell 10 is more stable. A pin socket 32 ​​is provided on the fixing portion 31, and the position of the communication connector 20 is determined by the position of the pin socket 32 ​​on the fixing portion 31, and the position of the communication shell 10 is determined by positioning the connector mounting opening 11 by the positioning block 33, thereby determining the welding assembly position of the communication shell 10 and the communication connector 20 by the position between the fixing block and the pin socket 32.

[0102] Specifically, a soldering filler metal 23 is provided at the bottom of the communication connector 20, a through groove 24 is provided in the middle of the soldering filler metal 23, the shape of the soldering filler metal 23 is adapted to the outer edge shape of the substrate 21, the pin 22 is installed in the through groove 24, the positioning block 33 is inserted into the communication shell 10, the positioning block 33 abuts against the inner side of the through groove 24, and the outer side of the substrate 21 abuts against the limit block 43. The communication connector 20 and the communication shell 10 are welded by the soldering filler metal 23. The soldering filler metal 23 is placed between the communication connector 20 and the communication shell 10, and extends to the inner side of the through groove 24 after being inserted into the connector installation port 11 through the positioning block 33, and the outer side of the positioning block 33 abuts against the side of the through groove 24, thereby fixing the soldering filler metal 23 at the welding position between the substrate 21 and the connector installation port 11.

[0103] The fixing part 31 is provided with a plurality of pin insertion holes 32, and the outer sides of the outermost pin insertion holes 32 are connected to form a insertion area, and the positioning block 33 is provided on the outer side of the insertion area. Since the connection position between the communication connector 20 and the connector installation port 11 is on the outer side of the outermost pin insertion hole 32, the side where the pin 22 is close to the pin 22 is the inner side, and the side where the pin 22 is away from the pin 22 is the outer side, that is, the edge position of the substrate 21. The positions of the plurality of pin insertion holes 32 of the fixing part 31 correspond to the positions of the pins 22 on the communication connector 20.

[0104] The pin insertion hole 32 is provided with a set depth. After the pin 22 is inserted into the pin insertion hole 32, the top surface of the solder 23 abuts against the substrate 21, and the bottom surface of the solder 23 abuts against the communication housing 10. The depth of the pin insertion hole 32 needs to be deep enough so that after the pin 22 on the substrate 21 is inserted, the bottom surface of the substrate 21 can abut against the solder 23, so as to ensure that both the substrate 21 and the connector installation port 11 can contact the solder 23 and ensure successful welding.

[0105] The positioning block 33 has a set height. The positioning block 33 is inserted into the communication shell 10 and extends into the through groove 24. The positioning block 33 needs to have a sufficient height. In addition to passing through the connector installation port 11, the positioning block 33 also needs to be inserted into the through groove 24 of the soldering material 23, so as to fix the placement of the soldering material 23 to ensure normal welding. However, the height of the positioning block 33 cannot be too high, because if the height of the positioning block 33 is too high, the substrate 21 will be lifted up, so that the substrate 21 and the soldering material 23 cannot contact, resulting in welding failure. Therefore, the height of the positioning block 33 is greater than the thickness of the connector installation port 11, and less than or equal to the sum of the thickness of the connector installation port 11 and the soldering material 23.

[0106] The communication shell 10 has a protruding column 12 on one side facing the supporting body 36, and the supporting body 36 is provided with a clearance hole 37, and the setting position of the clearance hole 37 corresponds to the position of the protruding column 12. In view of the special structure of the communication shell 10, the clearance hole 37 is provided to make the installation of the communication shell 10 and the supporting body more fit.

[0107] The top surface of the positioning block 33 is provided with a guide slope. When the communication shell 10 or the communication connector 20 is installed, the communication shell 10 or the communication connector 20 slides down along the guide slope and is installed on the processing base 30, which facilitates the installation of the communication shell 10 or the communication connector 20 on the processing base 30.

[0108] The shape of the pin insertion cavity covers a range greater than the range of the shape formed by the outer connecting lines of all the pins 22 located at the outermost side. The cross-section of the pin insertion cavity is greater than the range of the shape formed by the connecting lines of the outermost pins 22 on the substrate 21, so that all the pins 22 can be inserted into the pin insertion cavity, and the communication connector 20 can be normally installed on the ultrasonic tool head 40. The pin insertion cavity is provided with a set depth. When the ultrasonic tool head 40 is against the substrate 21, the set depth of the pin insertion cavity is greater than or equal to the length of the pin 22 inserted into the pin insertion cavity. In this way, the normal contact between the ultrasonic tool head 40 and the substrate 21 can be ensured, the ultrasonic tool head 40 can act normally on the substrate 21, and the normal welding can be ensured.

[0109] More specifically, the communication shell 10 is provided with a connector installation opening 11, the connector installation opening 11 and the substrate 21 are both rectangular, the connector installation opening 11 is adapted to the shape and size of the substrate 21, at least two positioning blocks 33 are set, and the positioning blocks 33 are respectively set at the corresponding positions of the four corners of the connector installation opening 11, wherein the two positioning blocks 33 are located at the two ends of the same diagonal of the connector installation opening 11, and the outer sides of the positioning blocks 33 abut against the connector installation opening 11. The positions of the connector installation opening 11 and the welding brazing material 23 are determined by at least two positioning blocks 33, and preferably, four positioning blocks 33 are set, and the four positioning blocks 33 are respectively set at the corresponding positions of the four corners of the connector installation opening 11.

[0110] At least two limit blocks 43 are provided, and the positions of the limit blocks 43 are respectively provided at the corresponding positions of the four corners of the substrate 21, that is, when the number of limit blocks 43 does not reach four, the limit blocks 43 are provided at any two or more of the four corners of the substrate 21, wherein two positioning blocks 33 are located at the two ends of the same diagonal line, wherein two limit blocks 43 are located at the two ends of the same diagonal line of the substrate 21, and the inner sides of the limit blocks 43 are against the side surfaces of the substrate 21. The ultrasonic tool head 40 determines the working position of the ultrasonic tool head 40 and the substrate 21 through the positioning of the limit blocks 43 and the substrate 21. Preferably, four limit blocks 43 are provided, and the four limit blocks 43 are respectively provided at the corresponding positions of the four corners of the substrate 21.

[0111] In a preferred embodiment, the processing base 30 is provided with a heating element, and the heating element is selected from a resistive heating wire, a pulse current induction coil, or a pulse current loaded on the processing base 30, and the resistive heating wire and the pulse current induction coil are installed inside or on the surface of the processing base 30. Preferably, the heating element is arranged inside the processing base 30, with a high safety factor, a small size of the ultrasonic tool head, and reduced energy consumption.

[0112] More specifically, the ultrasonic welding device includes an ultrasonic generating device and an ultrasonic frequency conversion rod. The ultrasonic generating device is electrically connected to the ultrasonic frequency conversion rod, and an ultrasonic tool head 40 is installed at the lower part of the ultrasonic frequency conversion rod.

[0113] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A communication interface ultrasonic welding process, characterized in that: The following steps are included: 1) Pre-assembly treatment steps: the products to be welded include the communication shell and the communication connector. The welding surfaces of the communication shell and the communication connector are mechanically polished and ultrasonically cleaned respectively; 2) Assembly step: Install the cleaned product to be welded on the ultrasonic welding device. The ultrasonic welding device includes a processing base and an ultrasonic tool head, including the following sub-steps: 2.1) Communication shell installation step: positioning and assembling the communication shell on the processing base, a fixing portion is provided on the top surface of the processing base, a pin avoidance chamber and a pin insertion hole for installing the pins on the communication connector are provided on the fixing portion, a connector installation opening is provided on the upper part of the communication shell, and the connector installation opening is installed on the outer edge of the pin avoidance chamber or the outer edge of the outermost pin insertion hole; The processing base is provided with a base and a support body, the support body is provided with a support bottom and a support body, the support bottom is installed on the base, the support body is protrudingly installed on one side of the support bottom, the fixing part is provided on the top surface of the support body, the middle part of the communication shell is recessed inwardly to form an installation cavity, the installation cavity of the communication shell is installed on the support body, a positioning block is protrudingly provided on the fixing part, the positioning block is provided at the assembly position of the communication connector and the communication shell, and the outer side of the positioning block is pressed against the connector installation port to fix the position of the connector installation port; 2.2) Communication connector installation step: the communication connector includes a substrate part and a plurality of pins. The substrate part is provided with a substrate, and each pin is respectively inserted into the substrate. The lower pins of the substrate are installed in the pin avoidance chamber and the pin jack, and the communication connector is fixed on the processing base; 2.3) The ultrasonic tool head installation step includes: a welding part is provided at the lower part of the ultrasonic tool head, a welding cutter body is provided at the edge of the bottom of the welding part, a pin insertion cavity is provided in the middle area of ​​the bottom of the welding part, the pin insertion cavity penetrates the welding cutter body and forms a corresponding pin insertion port, the pins on the upper side of the substrate are installed in the pin insertion cavity, the ultrasonic tool head presses the substrate part, and the welding surface of the substrate part is in contact with the welding surface of the communication shell; A limit block is arranged in the welding part, the position of the limit block is arranged to match the outer shape of the substrate, the substrate is clamped and installed on the inner side of the limit block, and the installation position of the ultrasonic tool head and the substrate is determined; 3) Welding step: the ultrasonic welding device heats the product to be welded, and one or two of the heating methods of induction heating, resistance heating, pulse heating or resistance furnace heating are selected; Heat the products to be welded to at least the set welding temperature by processing the base and / or the ultrasonic tool head, At least the joint installation port and the communication joint are heated, and ultrasonic waves are transmitted to the joint installation port and the communication joint through the ultrasonic tool head, so that the substrate part and the joint installation port are ultrasonically brazed at a set welding temperature, and heating and ultrasonic loading are stopped after 0.1-3 seconds of ultrasonic brazing, or heating and ultrasonic loading are stopped after 20-35 seconds of ultrasonic brazing, and the welding of the communication joint is completed. When the ultrasonic welding device uses pulse heating as the heating method, the ultrasonic tool head and / or the processing base is provided with a pulse heating device for pulse heating the product to be welded, and the ultrasonic tool head applies ultrasonic action to the product to be welded for a time of 0.1-3 seconds; When the ultrasonic welding device uses electromagnetic induction heating, built-in resistance heating or resistance furnace heating as one or both of the heating methods, the ultrasonic tool head applies ultrasonic action to the product to be welded for 20-35 seconds; The ultrasonic amplitude is set at 5-30μm, the ultrasonic power is controlled at 10-100W, the ultrasonic frequency is controlled at 20-60kHz, and the product to be welded is heated to the welding temperature by heating the processing base and / or the ultrasonic tool head. The temperature of the product to be welded drops to room temperature, and the communication joint is welded.

2. A communication interface ultrasonic welding process according to claim 1, characterized in that: The material of the communication shell is aluminum, copper or iron, and the material of the substrate is aluminum, copper, ceramic or glass. In the communication connector installation step, the substrate portion includes soldering filler metal, the pins are inserted into the substrate, a soldering filler metal is provided on one side of the substrate facing the connector installation port, a through groove is provided in the middle of the soldering filler metal, the pins on one side of the substrate pass through the through groove and are inserted into the pin avoidance chamber or the pin insertion hole, and the two sides of the soldering filler metal are respectively against the soldering surface of the substrate and the soldering surface of the connector installation port. When the substrate is made of ceramic or glass, a metal connection layer is electroplated on the surface of the substrate, and the metal connection layer is arranged between the substrate and the solder; In the welding step, the welding temperature is set at 200-350°C, the substrate is connected to the joint installation port by welding solder, the heating and ultrasound are stopped, the product to be welded is cooled to room temperature, and the welding is completed.

3. A communication interface ultrasonic welding process according to claim 1, characterized in that: When the ultrasonic welding device adopts the pulse heating method, a pulse heating device is arranged on the ultrasonic tool head and / or the processing base. The pulse heating device includes a heating conductor and a conductive metal group. A conductive metal group is formed by two mutually insulated metal bodies. The heating conductor is electrically connected to the two metal bodies in the conductive metal group respectively. The two metal bodies in the conductive metal group are electrically connected to the pulse power supply respectively. The heating conductor, the conductive metal group and the pulse power supply are connected in series to form a pulse current loop. The heating conductor transfers heat to the product to be welded during welding.

4. A communication interface ultrasonic welding process according to claim 3, characterized in that: The heating conductor is pressed against the ultrasonic tool head, and the heating conductor is provided with two conductive mounting parts, which are respectively fixed in series with two metal bodies in the same pulse current loop.

5. A communication interface ultrasonic welding process according to claim 1, characterized in that: The ultrasonic welding device adopts a combined heating method of pulse heating and resistance heating. One of the ultrasonic tool head and the processing base adopts a pulse heating method, and the other adopts a resistance heating method. One of the ultrasonic tool head and the processing base is provided with the pulse heating device, and the other is provided with a resistance heating device.

6. A communication interface ultrasonic welding device, used to implement a communication interface ultrasonic welding process according to any one of claims 1 to 5, characterized in that: An ultrasonic tool head (40) and a processing base (30) for respectively fixing a communication shell (10) and a communication connector (20), wherein the communication connector (20) is provided with a substrate (21) and a plurality of pins (22), each pin (22) being inserted into the substrate (21), the processing base (30) being provided with a fixing portion (31), the fixing portion (31) being provided with a pin (22) avoidance chamber and / or a pin insertion hole (32) for inserting the pin (22), a welding portion (41) being provided at the lower portion of the ultrasonic tool head (40), a welding blade body being provided at least at the outer edge of the bottom of the welding portion (41), and a pin insertion cavity (42) being provided at least at the middle region of the bottom of the welding portion (41), the pin insertion cavity (42) penetrating the welding blade body and forming a corresponding pin insertion opening; The processing base (30) is provided with a base (34) and a support body, the support body is provided with a support bottom (35) and a support body (36), the support bottom (35) is mounted on the base (34), the support body (36) is protrudingly mounted on one side of the support bottom (35), and the fixing portion (31) is arranged on the top surface of the support body (36). The fixing portion (31) is provided with a positioning block (33) protruding therefrom. The positioning block (33) is arranged at an assembly position of the communication connector (20) and the communication housing (10). The welding portion (41) is provided with a limit block (43), the position of the limit block (43) being arranged to match the outer shape of the substrate (21), and the substrate (21) is located on the inner side of the limit block (43). A pin (22) avoidance chamber is provided at the upper portion of the fixing portion (31), and the pin (22) avoidance chamber is provided with a pin insertion hole (32) corresponding to the position of the pin (22); A soldering material (23) is provided at the bottom of the communication connector (20), a through groove (24) is provided in the middle of the soldering material (23), the shape of the soldering material (23) is adapted to the shape of the outer edge of the substrate (21), the pin (22) is installed in the through groove (24), the positioning block (33) is inserted into the communication housing (10), the positioning block (33) is pressed against the inner side of the through groove (24), and the outer side of the substrate (21) is pressed against the limit block (43). The fixing portion (31) is provided with a plurality of pin insertion holes (32), the outer sides of the outermost pin insertion holes (32) are connected to form a insertion hole area, and the positioning block (33) is arranged outside the insertion hole area. The pin insertion hole (32) is provided with a set depth. After the pin (22) is inserted into the pin insertion hole (32), the top surface of the soldering material (23) abuts against the substrate (21), and the bottom surface of the soldering material (23) abuts against the communication housing (10). The positioning block (33) has a set height. The positioning block (33) is inserted into the communication housing (10) and extends into the through slot (24). The communication housing (10) has a protruding column (12) on one side facing the supporting body (36), and the supporting body (36) is provided with a clearance hole (37), and the setting position of the clearance hole (37) corresponds to the position of the protruding column (12). The top surface of the positioning block (33) is provided with a guiding inclined surface. The communication shell (10) is provided with a connector installation opening (11), the connector installation opening (11) and the base plate (21) are both rectangular, the connector installation opening (11) and the base plate (21) are adapted in shape and size, at least two positioning blocks (33) are provided, the positioning blocks (33) are respectively arranged at positions corresponding to the four corners of the connector installation opening (11), wherein the two positioning blocks (33) are located at two ends of the same diagonal line of the connector installation opening (11), and the outer sides of the positioning blocks (33) abut against the connector installation opening (11). At least two limit blocks (43) are provided, and the limit blocks (43) are respectively provided at corresponding positions of the four corners of the substrate (21), wherein the two limit blocks (43) are located at two ends of the same diagonal line of the substrate (21), and the inner sides of the limit blocks (43) are in contact with the side surfaces of the substrate (21). The shape coverage of the pin insertion cavity (42) is larger than the shape range formed by the outer side connection line of all the pins (22) located at the outermost side. The pin insertion cavity (42) is provided with a set depth. When the ultrasonic tool head (40) is in contact with the substrate (21), the set depth of the pin insertion cavity (42) is greater than or equal to the length of the portion of the pin (22) inserted into the pin insertion cavity (42). The processing base (30) and / or the ultrasonic tool head (40) are provided with a heating element, and the heating element is selected from a resistive heating wire, a pulse current induction coil, or a pulse current loaded on the processing base (30). The resistive heating wire and the pulse current induction coil are installed inside or on the surface of the processing base (30). The ultrasonic welding device comprises an ultrasonic generating device and an ultrasonic frequency conversion rod, the ultrasonic generating device is electrically connected to the ultrasonic frequency conversion rod, and an ultrasonic tool head (40) is installed at the lower part of the ultrasonic frequency conversion rod.

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