CN-122026192-A - Technological method for reducing resistance and increasing reliability of riveting terminal

CN122026192ACN 122026192 ACN122026192 ACN 122026192ACN-122026192-A

Abstract

The invention is suitable for the technical field of wire riveting, and provides a process method for reducing resistance and increasing reliability of a riveting terminal, which adopts terminal riveting tin feeding equipment to finish riveting and tin soldering of a terminal and a wire, and comprises the steps of wire pre-positioning and transferring, wire and terminal riveting, riveting position posture correction, riveting position tin melting, online detection and automatic blanking; according to the method, tin water flows into a microscopic metal embedded structure from the position of a feed window of a terminal through a tin soldering process, a micro-gap between a lead copper wire and the terminal is filled, and the composite connection of mechanical riveting and tin soldering is realized, so that the initial contact resistance of the lead copper wire is greatly reduced, excellent resistance stability can be maintained under severe high-low temperature circulation and humid heat aging environment, the problem of resistance drift caused by micro-gap oxidation in a pure riveting process is thoroughly solved, meanwhile, the drawing force is remarkably improved, the consistency is excellent, and the lead copper wire does not loose and break under the high-strength random vibration working condition.

Inventors

LI YAFEI
WANG DAXUE
WANG YONGQIANG

Assignees

深圳市源刚自动化设备有限公司

Dates

Publication Date: 20260512
Application Date: 20260409

Claims (8)

1. The utility model provides a rivet pressing terminal reduces resistance and increases technological method of reliability, adopts terminal riveting to go up tin material equipment and accomplish riveting and tin soldering to terminal and wire, and this equipment comprises processing platform, riveting machine, translation mechanism, line positioning mechanism, last tin material mechanism, laser heater, PLC control system and vision detection system, riveting machine, translation mechanism, line positioning mechanism, last tin material mechanism and laser heater all fix on processing platform and all with PLC system control system electric connection, line positioning mechanism, last tin material mechanism and laser heater all are located the left side processing area of riveting machine, translation mechanism is located the front side processing area of line positioning mechanism, last tin material mechanism and laser heater, laser heater is located the top of line positioning mechanism, last tin material mechanism is located the back side of line positioning mechanism, its characterized in that, the concrete steps of technological method are as follows: the method comprises the steps of firstly, pre-positioning and transferring wires, namely, conveying the peeled wires to a riveting processing station of a riveting machine by a translation mechanism, aligning a first wire among a plurality of wires on the translation mechanism to the center of a riveting die on the riveting machine, and completing coaxiality calibration of the wires and terminals; The riveting machine drives the riveting die to press downwards, the riveting die accurately presses the terminal positioned in the center of the riveting die on the end part of the wire, the riveting of the terminal and the wire is completed, and a microscopic metal embedded structure is formed; Thirdly, correcting the posture of the riveting part, namely conveying the wires subjected to terminal riveting to a positioning station of a wire positioning mechanism by a translation mechanism, positioning all the wires on the translation mechanism by the wire positioning mechanism, finishing the posture correction and the accurate positioning of the height of the end parts of the wires, and enabling the riveting end surface of each wire to be perpendicular to a laser heater; The solder on the riveting part is melted, namely the solder feeding mechanism accurately and quantitatively conveys the solder on the solder feeding mechanism to the riveting part of the terminal and the wire through a feeding window formed on the terminal, the laser heater simultaneously carries out uniform and constant-temperature local melting on the solder in the riveting part, the terminal and the wire according to preset power and focusing parameters, and the melted solder fully infiltrates and fills micro gaps in a micro metal embedding structure under continuous constant-temperature heating to form a compact, low-resistance and high-reliability metallurgical bonding layer and realize double connection of mechanical embedding and metallurgical bonding; And fifthly, performing on-line detection and automatic blanking, namely performing visual detection on the appearance and the thickness of the metallurgical bonding layer by a visual detection system, automatically triggering a blanking instruction by a workpiece after reaching the standard, and completing blanking operation.
2. The process method for reducing resistance and increasing reliability of a riveting terminal according to claim 1, wherein the translation mechanism comprises a mounting seat, a translation sliding rail, a translation seat, a transverse translation module and a longitudinal translation module, the mounting seat is fixed on a processing platform and penetrates through a riveting station, a positioning station and a detection station, the mounting seat is longitudinally provided with the translation sliding rail for sliding fit of the translation seat, the mounting seat is provided with the longitudinal translation module for driving the translation seat to move back and forth among the riveting station, the positioning station and the detection station, and the translation seat is fixedly provided with the transverse translation module for driving a wire to move towards the riveting station and the positioning station.
3. The process for reducing resistance and increasing reliability of a rivet terminal according to claim 1, wherein the wire positioning mechanism comprises a positioning frame, an upper positioning assembly and a lower positioning assembly, wherein the positioning frame is fixed on the processing platform, and the upper positioning assembly and the lower positioning assembly are symmetrically arranged on one side of the positioning frame.
4. The process for reducing resistance and increasing reliability of a rivet terminal according to claim 3, wherein the upper positioning assembly comprises an upper positioning cylinder, an upper positioning block and a positioning baffle plate, the upper positioning cylinder is mounted at the top of the positioning frame, the output end of the upper positioning cylinder is connected with the upper positioning block vertically and slidably mounted on the positioning frame, and the positioning baffle plate matched with the lower positioning assembly is mounted at the bottom of the upper positioning block.
5. The process method for reducing resistance and increasing reliability of a riveting terminal according to claim 4, wherein the lower positioning assembly comprises a lower positioning cylinder, a lower positioning block and a comb-shaped workpiece, the lower positioning cylinder is fixed on one side of a positioning frame, the output end of the lower positioning cylinder is connected with the lower positioning block which is vertically and slidably arranged on the positioning frame, and the comb-shaped workpiece matched with a positioning baffle is fixed on the top of the lower positioning block.
6. The process method for reducing resistance and increasing reliability of riveting terminals according to claim 1, wherein the tin feeding mechanism comprises a feeding frame, a moving assembly, a moving seat, a feeding sliding rail, a lifting cylinder, a lifting seat and a needle tube, wherein the feeding frame is fixed on a processing platform, the moving assembly is fixed on the feeding frame, the output end of the moving assembly is connected with the moving seat which is horizontally and slidably arranged on the feeding sliding rail, the feeding sliding rail is fixed on the feeding frame, the lifting cylinder is arranged on the moving seat, the lifting seat is fixed on the output end of the lifting cylinder, the needle tube is rotationally and symmetrically arranged on the lifting seat, and tin paste is filled in the needle tube.
7. The process for reducing resistance and increasing reliability of a rivet terminal according to claim 6, wherein the moving assembly comprises a moving motor, a driving shaft, a gear and a rack, wherein the moving motor is fixed on the upper material frame, the driving shaft is fixed on the output end of the moving motor, the gear is coaxially fixed on the driving shaft, and the gear is meshed with the rack fixed on the moving seat.
8. The process method for reducing resistance and increasing reliability of a riveting terminal according to claim 1, wherein the preset power of the laser heater is 200W, the focusing parameters of the laser heater comprise a focal length parameter and a spot size, the focal length parameter is 100mm, the spot size is 1.8mm, and an infrared temperature monitor is arranged on the laser heater and is used for monitoring the melting temperature of a melting area in real time and feeding the monitored temperature back to a PLC control system in time.

Description

Technological method for reducing resistance and increasing reliability of riveting terminal Technical Field The invention belongs to the technical field of wire riveting, and particularly relates to a process method for reducing resistance and increasing reliability of a riveting terminal. Background The quality of the connection of the terminals to the wires directly determines the stability and the service life of the whole electrical system. The main stream connecting process in the industry at present mainly comprises a pure mechanical riveting process and a traditional soldering process. The pure mechanical riveting process has the advantages that the inner wall of the terminal and the copper wire of the lead are plastically deformed by means of mechanical extrusion force of a die to form a micro cold welding embedded structure to realize connection, although the production efficiency of the process is high, the process has the intrinsic defects that a large number of micron-sized gaps are inevitably formed between the copper wire and the inner wall of the terminal, contact resistance continuously drifts due to factors such as moisture absorption, oxidation and corrosion in the long-term use process, heating, ablation and even breaking accidents are caused in severe cases, meanwhile, the drawing force dispersion degree of the pure riveting connection is high, the vibration fatigue resistance is poor, loosening and falling phenomena are extremely easy to occur under high vibration working conditions such as automobiles, aerospace and the like, the use requirement of a high-reliability system cannot be met, the traditional pure mechanical riveting process also can cause breakage of the copper wire of the lead, the resistance is unstable, the resistance requirement on the lead is even more severe in the large data age, and the tiny resistance change in high-frequency signal transmission can obviously influence the data integrity. Therefore, in view of the above situation, there is an urgent need to develop a process for reducing the resistance and increasing the reliability of the rivet terminal, so as to overcome the shortcomings in the current practical application. Disclosure of Invention Aiming at the defects existing in the prior art, the embodiment of the invention aims to provide a process method for reducing resistance and increasing reliability of a riveting terminal so as to solve the problems in the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a rivet pressing terminal reduces resistance and increases technological method of reliability, includes adopting terminal riveting to go up tin material equipment and accomplish the riveting and the soldering to terminal and wire, this equipment comprises processing platform, riveting machine, translation mechanism, line positioning mechanism, last tin material mechanism, laser heater, PLC control system and visual detection system, riveting machine, translation mechanism, line positioning mechanism, last tin material mechanism and laser heater all fix on processing platform and all with PLC system control system electric connection, line positioning mechanism, last tin material mechanism and laser heater all are located the left side processing area of riveting machine, translation mechanism is located the front side processing area of line positioning mechanism, last tin material mechanism and laser heater, laser heater is located the top of line positioning mechanism, last tin material mechanism is located the back side of line positioning mechanism, the specific steps of technological method are as follows: the method comprises the steps of firstly, pre-positioning and transferring wires, namely, conveying the peeled wires to a riveting processing station of a riveting machine by a translation mechanism, aligning a first wire among a plurality of wires on the translation mechanism to the center of a riveting die on the riveting machine, and completing coaxiality calibration of the wires and terminals; The riveting machine drives the riveting die to press downwards, the riveting die accurately presses the terminal positioned in the center of the riveting die on the end part of the wire, the riveting of the terminal and the wire is completed, and a microscopic metal embedded structure is formed; Thirdly, correcting the posture of the riveting part, namely conveying the wires subjected to terminal riveting to a positioning station of a wire positioning mechanism by a translation mechanism, positioning all the wires on the translation mechanism by the wire positioning mechanism, finishing the posture correction and the accurate positioning of the height of the end parts of the wires, and enabling the riveting end surface of each wire to be perpendicular to a laser heater; The solder on the riveting part is melted, namely the solder feeding mechanism accurat