Coaxial cable 2m joint welding parameter adjustment system and method based on quality evaluation

Abstract

This invention discloses a system and method for adjusting welding parameters of 2M coaxial cable joints based on quality assessment, relating to the field of cable joint processing technology. The system is applied to cable joint processing equipment and includes a welding execution module, a parameter setting module, a quality assessment module, a parameter correction module, and a process storage module. The welding execution module works with a soldering machine to complete soldering connections. The parameter setting module is used to input cable specifications and set welding parameters. The quality assessment module is used to evaluate the quality grade of the solder joint. The parameter correction module is used to adjust and output the welding temperature, solder feed rate, and welding time. The process storage module allows the parameter setting module to retrieve historically optimal welding parameters. This invention adjusts the welding temperature, solder feed rate, and welding time to adapt the welding process to different cable specifications, improving the problem that traditional fixed welding parameters cannot adapt to multiple batches and specifications of cables.

Description

Technical Field

[0001] This invention relates to the field of cable joint processing technology, specifically to a system and method for adjusting welding parameters of 2M coaxial cable joints based on quality assessment. Background Technology

[0002] Coaxial cable 2M connectors are widely used in communication equipment, radio frequency equipment, industrial control equipment and aerospace equipment. Their welding quality directly affects the stability of signal transmission and the service life of the product.

[0003] In current cable joint welding processes, operators typically pre-set process parameters such as welding temperature, solder feed amount, and welding time based on experience, and use fixed parameters to complete batch welding operations. However, different batches of cables vary in conductor diameter, plating thickness, material properties, and ambient temperature. Fixed parameters often fail to meet all welding requirements, easily leading to problems such as insufficient solder, cold solder joints, solder buildup, and poor solder joint formation.

[0004] After the welding process is completed, some automated equipment uses visual inspection technology to check the quality of the weld points. However, the inspection results are mainly used for quality judgment and cannot form a parameter optimization mechanism suitable for manual production scenarios. For small and medium batch production and on-site maintenance operations, it still largely depends on operators to observe the condition of the weld points with their naked eyes and adjust the welding parameters.

[0005] Based on this, a coaxial cable 2M joint welding parameter adjustment system and method based on quality assessment is now provided, which can eliminate the drawbacks of existing technical solutions. Summary of the Invention

[0006] The purpose of this invention is to provide a system and method for adjusting welding parameters of 2M coaxial cable joints based on quality assessment, so as to solve the problems in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A coaxial cable 2M joint welding parameter adjustment system based on quality assessment is applied to cable joint processing equipment. The cable joint processing equipment includes a frame, inside which are a switching power supply, a first wire stripper, a second wire stripper, wire clamps, and a soldering machine. A serial port display screen is installed on the top of the frame. The first wire stripper is used to strip the outer sheath of the cable, the second wire stripper is used to strip the inner insulation layer of the cable to expose the central conductor, the wire clamps are used to clamp and position the connection area between the central conductor of the cable and the central pin of the joint, and the serial port display screen is used to perform parameter input, working mode switching, and solder joint quality level input operations. The system includes a welding execution module with signal interaction, a parameter setting module, a quality evaluation module, a parameter correction module, and a process storage module. The welding execution module has a built-in heating submodule, a solder feeding module, and a welding head submodule. It is used to receive parameter setting instructions output by the parameter setting module and cooperate with the soldering machine to complete the soldering connection between the cable center conductor and the connector center pin. The parameter setting module is electrically connected to the serial port display screen and is used to input cable specifications and set welding parameters. The welding parameters include three types of adjustable variables: welding temperature, solder amount, and welding time. The quality assessment module is electrically connected to the serial port display screen, and is used by the operator to observe the state of the solder joints after soldering, evaluate the quality level of the solder joints and record it. The quality level of the solder joints is divided into five categories: excellent, insufficient solder, cold solder joint, excessive solder, and poor forming. The parameter correction module is used to pre-store the parameter correction strategy corresponding to each solder joint quality level, receive the solder joint quality level output by the quality assessment module, and adjust the welding temperature, solder feed amount and welding time according to the corresponding parameter correction strategy, and output the corrected welding parameters back to the parameter setting module. The process storage module is used to store cable specifications, original welding parameters, welding parameters after each correction, parameter correction records, and optimal welding parameters, forming a process database for the parameter setting module to retrieve historical optimal welding parameters.

[0008] Furthermore, the soldering machine includes a stepper motor, a fixed bracket, a soldering iron, and a solder wire feeding hole. The stepper motor is mounted on the frame via the fixed bracket and is used to drive the soldering iron to perform movement operations and to drive the solder wire feeding hole to perform solder feeding operations. The solder wire feeding hole is located on one side of the soldering iron and is used to position the solder wire delivery path to match the working position of the soldering iron. The soldering iron is electrically connected to the heating submodule and works together to achieve the effect of adjusting the soldering temperature. The stepper motor is electrically connected to the solder feeding submodule and the soldering head submodule, and works with the soldering iron and the solder wire feeding hole to achieve the effect of adjusting the soldering time and the amount of solder fed.

[0009] Furthermore, both the first and second wire strippers are configured with a wire stripping head structure driven by a first DC geared motor, including a motor bracket, a first DC geared motor, a retainer, a metal baffle, a blade adapter, blades, and springs. The first DC geared motor is fixedly installed inside the motor bracket, and the output end of the first DC geared motor is rigidly connected to the retainer coaxially. The retainer is provided with a blade adapter on the side away from the DC geared motor. The blade adapter internally houses a pair of blades and springs. The first and second wire strippers are arranged inside the frame of the cable joint processing equipment along the cable feeding direction, and work together to strip the cable to expose the center conductor of a predetermined length.

[0010] Furthermore, the wire clamp includes a second DC geared motor, a lead screw, a nut slider, a pressing push rod, a wire clamping area plate, and clamps. The second DC geared motor is fixedly mounted on the frame, and the output end of the second DC geared motor is fixedly connected to the lead screw. The lead screw is threadedly driven to the nut slider. The outer side of the nut slider is symmetrically provided with pressing push rods. One side of the pressing push rod is connected to the wire clamping area plate, and several clamps are provided on the side of the wire clamping area plate away from the pressing push rod. The second DC geared motor drives the lead screw to rotate, which in turn drives the nut slider to move axially along the lead screw, pushing the pressing rod, the wire clamping plate, and the clamp to open and close synchronously. The clamp clamps the connection area between the center conductor of the cable and the center pin of the connector, thereby achieving welding positioning.

[0011] Furthermore, the appearance characteristics for determining the quality level of the solder joint are as follows: For the excellent grade, the appearance characteristics are: full solder, good wetting, bright surface, and rounded shape. For the low solder level, the appearance characteristics are: insufficient solder, small solder joints, and partial exposure of the substrate. For the grade of poor soldering, the appearance characteristics are: insufficient wetting, rough surface, graying, and weak bonding between the solder joint and the substrate. For the solder excess level, the appearance characteristics are solder accumulation, bulging, short circuit, or other issues affecting assembly. For the poor forming grade, the appearance judgment characteristics are indicated as uneven weld point shape, skewness, and the presence of pores or cracks.

[0012] Furthermore, the parameter correction strategy specifically includes: For low tin grades, the welding temperature and welding time remain at the original welding parameter values, while the tin feed amount is increased by 10% to 20%. For the cold solder joint level, the amount of solder delivered remains the same as the original soldering parameters, the soldering temperature is increased by 10℃~20℃, and the soldering time is increased by 0.2s~0.5s. For the solder excess level, the soldering temperature is maintained at the original soldering parameter value, the solder feed amount is reduced by 10%~20%, and the soldering time is shortened by 0.2s~0.5s; For the defective forming grade, the soldering temperature is increased by 5℃~15℃, the solder feed amount is increased by 5%~15%, and the soldering time is increased by 0.2s~0.3s; For the excellent grade, the welding temperature, solder feed rate, and welding time are all maintained at the original welding parameter values.

[0013] Furthermore, the welding parameter setting logic of the parameter setting module is as follows: after the cable specification is entered, the process database in the process storage module is searched in advance. If a matching record exists, the optimal welding parameters are directly loaded. If no matching record exists, the system's built-in initial welding parameters are called. The initial welding parameters are set as follows: welding temperature is 340℃, solder feed is 1.0mm, and welding time is 1.5s.

[0014] Furthermore, the logic for determining the optimal welding parameters is as follows: for test welding samples of the same cable specification, if the quality level of the weld points corresponding to the weld points of three consecutive welded samples is excellent, the current welding temperature, solder feed amount, and welding time are determined to be the optimal welding parameters for the cable specification.

[0015] A method for adjusting welding parameters of 2M coaxial cable joints based on quality assessment, applied to a system for adjusting welding parameters of 2M coaxial cable joints based on quality assessment, specifically includes the following steps: Step S1: The operator enters the specifications of the cable to be processed through the serial port display screen. The system searches the process database in the process storage module. If there are no welding parameters for the corresponding cable specifications in the process database, the initial welding parameters are retrieved. If there are historical best welding parameters, they are directly retrieved as the current welding parameters. Step S2: Control the first wire stripper and the second wire stripper to strip the outer sheath and inner insulation layer of the cable in sequence, and control the wire clamp to clamp the connection area between the center conductor of the cable and the center pin of the connector to achieve welding positioning; Step S3: The welding execution module receives the parameter setting instruction output by the parameter setting module, starts the soldering machine according to the output welding parameters, and completes the soldering connection between the cable center conductor and the connector center pin. Step S4: The operator observes the condition of the weld joint after welding, evaluates the quality level of the weld joint, and enters the corresponding quality level of the weld joint through the serial port display screen. Step S5: The parameter correction module receives the weld quality level output by the quality assessment module, retrieves the corresponding parameter correction strategy for matching, updates the welding parameters, and sends them back to the parameter setting module. Step S6: Repeat steps S2 to S5 using the corrected welding parameters, continuously iterating and correcting the welding parameters until the quality level of the weld points corresponding to the three consecutive welded weld points is evaluated as excellent. At this point, the parameter correction module stops updating and adjusting the welding temperature, solder feed, and welding time. The system determines the current welding parameters as the optimal welding parameters and binds them to the corresponding cable specifications and stores them in the process database.

[0016] Furthermore, before entering the specifications of the cable to be processed, step S1 also includes a self-test step: the operator switches the system to manual debugging mode through the serial port display screen, controls the first wire stripper, the second wire stripper, the wire clamp and the soldering machine to perform jog tests, and confirms that there is no jamming in the transmission, lifting and soldering actions, and then switches the system to automatic production mode through the serial port display screen.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention classifies solder joint conditions into five levels: excellent, insufficient solder, cold solder joint, excessive solder, and poor forming, and establishes corresponding parameter correction strategies. Operators only need to visually select the solder joint condition to complete parameter compensation and adjustment, which reduces the reliance on personal experience in the process of adjusting soldering parameters and improves the standardization of operation. 2. This invention uses the results of manual quality assessment as feedback signals to quantitatively increase or decrease three welding parameters: welding temperature, solder feed amount, and welding time. This achieves dynamic optimization of welding parameters. The welding parameters are iteratively corrected for cables with different conductor diameters, plating, and materials until three consecutive solder joints reach an excellent grade and the optimal welding parameters are solidified. This allows the welding process to adapt to different specifications of cables and different material conditions, improving the problem that traditional fixed welding parameters cannot be adapted to multiple batches and specifications of cables. 3. This invention continuously records the parameter correction results, binds and stores the optimal welding parameters for each cable specification to the process storage module, and forms a process database. This allows subsequent products of the same type to quickly call up the optimal welding parameter scheme, eliminating the need for repeated trial welding and parameter adjustment, shortening the production changeover and debugging time, improving product consistency, and eliminating the need to add visual inspection equipment or complex control systems. Welding parameter optimization can be achieved solely through manual observation, reducing equipment investment costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the system architecture of the present invention.

[0019] Figure 2 This is a schematic diagram of the cable connector processing equipment of the present invention.

[0020] Figure 3 This is a schematic diagram of the soldering machine of the present invention.

[0021] Figure 4 This is a schematic diagram of the wire stripping machine of the present invention.

[0022] Figure 5 For the present invention Figure 4 Cross-sectional view at point FF.

[0023] Figure 6 This is a schematic diagram of the wire clamp of the present invention.

[0024] Figure 7 This is a schematic diagram of the method steps of the present invention.

[0025] Figure 8 This is a schematic diagram of the method flow of the present invention.

[0026] Figure 9 This is a schematic diagram illustrating the construction process of the process database of the present invention.

[0027] Figure reference numerals: Frame 110, Switching power supply 120, First wire stripper 130, Motor bracket 131, First DC geared motor 132, Fixer 133, Metal baffle 134, Blade adapter 135, Blade 136, Spring 137, Second wire stripper 140, Wire clamp 150, Second DC geared motor 151, Lead screw 152, Nut slider 153, Pressing push rod 154, Wire clamping area plate 155, Clip 156, Soldering machine 160, Stepper motor 161, Fixing bracket 162, Soldering iron 163, Solder wire feeding hole 164, Serial port display 170, Soldering execution module 210, Parameter setting module 220, Quality assessment module 230, Parameter correction module 240, Process storage module 250. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] To address the issues of existing cable joint welding using fixed process parameters, which are prone to defects such as insufficient solder, cold solder joints, solder buildup, and poor forming due to the influence of cable conductor diameter, plating, material, and ambient temperature, and the fact that existing visual inspection equipment only performs post-production quality judgment and cannot adapt to small-batch production and on-site manual parameter adjustment scenarios, and considering that manual visual inspection is still the mainstream quality inspection method in cable processing, there is a market gap for low-cost, standardized closed-loop parameter adjustment processes. This invention provides a coaxial cable 2M joint welding parameter adjustment system and method based on quality assessment. The concept is to build a control architecture including a welding execution module 210, a parameter setting module 220, a quality assessment module 230, a parameter correction module 240, and a process storage module 250, and to provide an integrated processing equipment with a two-stage wire stripping mechanism, a cable flexible support mechanism, and a soldering machine. Five types of solder joint quality levels are classified and matched with parameter correction strategies. The welding temperature, solder feed, and welding time are optimized iteratively based on the results of manual visual assessment. After the standards are met, the optimal welding parameters for each cable specification are archived. This improves the problems of poor adaptability of traditional fixed welding parameters and the lack of unified standards for manual parameter adjustment. The specific technical solution is shown below.

[0030] Example 1

[0031] In this embodiment, as Figures 1-5As shown, this invention provides a coaxial cable 2M joint welding parameter adjustment system based on quality assessment. The system is applied to cable joint processing equipment, which includes a frame 110. Inside the frame 110 are a switching power supply 120, a first wire stripper 130, a second wire stripper 140, a wire clamp 150, and a soldering machine 160. A serial port display screen is installed on the top of the frame 110. The first wire stripper 130 is used to strip the outer sheath of the cable, the second wire stripper 140 is used to strip the inner insulation layer of the cable to expose the central conductor of the cable, the wire clamp 150 is used to clamp and position the connection area between the central conductor of the cable and the central pin of the joint, and the serial port display screen is used to perform parameter input, working mode switching, and solder joint quality level input operations. like Figure 1 As shown, the system includes a welding execution module 210 for signal interaction, a parameter setting module 220, a quality evaluation module 230, a parameter correction module 240, and a process storage module 250. The modules interact with each other and transmit control commands via an RS232 serial port or an internal bus. The welding execution module 210 has a built-in heating submodule, a solder feeding module, and a welding head submodule. It is used to receive parameter setting commands output by the parameter setting module 220 and work with the soldering machine 160 to complete the soldering connection between the cable center conductor and the connector center pin. The parameter setting module 220 is electrically connected to the serial port display screen and is used to input cable specifications and set welding parameters. The welding parameters include three adjustable variables: welding temperature, solder feed amount, and welding time. The solder feed amount refers to the length of the solder wire fed out by the stepper motor 161 through the solder wire feed hole 164, which is achieved by controlling the number of rotation steps of the stepper motor 161. The welding parameter setting logic of the parameter setting module 220 is as follows: after the cable specification is entered, the process database in the process storage module 250 is searched in advance. If a matching record exists, the optimal welding parameters are loaded directly. If no matching record exists, the system's built-in initial welding parameters are called. The initial welding parameters are set as follows: welding temperature is 340℃, solder feed is 1.0mm, and welding time is 1.5s. The quality assessment module 230 is electrically connected to the serial port display screen, which is used by the operator to observe the status of the solder joints after soldering, evaluate the quality level of the solder joints and record it. The quality level of the solder joints is divided into five categories: excellent, insufficient solder, cold solder joint, excessive solder, and poor forming. The parameter correction module 240 is used to pre-store the parameter correction strategy corresponding to each solder joint quality level, receive the solder joint quality level output by the quality assessment module 230, and adjust the welding temperature, solder feed amount and welding time according to the corresponding parameter correction strategy, and output the corrected welding parameters back to the parameter setting module 220. The process storage module 250 is used to store cable specifications, original welding parameters, welding parameters after each correction, parameter correction records, and optimal welding parameters to form a process database, which is used by the parameter setting module 220 to retrieve historical optimal welding parameters. The optimal welding parameters are determined as follows: for test samples of the same cable specification, if the quality level of the weld points corresponding to the weld points of three consecutive welded samples is excellent, the current welding temperature, solder feed amount, and welding time are determined to be the optimal welding parameters for the cable specification.

[0032] like Figure 2 and Figure 3 As shown, the soldering machine 160 includes a stepper motor 161, a fixed bracket 162, a soldering iron 163, and a solder wire feeding hole 164. The stepper motor 161 is mounted on the frame 110 via the fixed bracket 162 and is used to drive the soldering iron 163 to perform movement operations and drive the solder wire feeding hole 164 to perform solder feeding operations. The solder wire feeding hole 164 is located on one side of the soldering iron 163 and is used to position the solder wire delivery path to match the working position of the soldering iron. The soldering iron 163 is electrically connected to the heating submodule and works together to achieve the effect of adjusting the soldering temperature. The stepper motor 161 is electrically connected to the solder feeding submodule and the soldering head submodule, and works with the soldering iron 163 and the solder wire feeding hole 164 to achieve the effect of adjusting the soldering time and the amount of solder fed.

[0033] like Figure 2 , Figure 4 and Figure 5 As shown, both the first wire stripper 130 and the second wire stripper 140 are configured with a wire stripping head structure driven by the first DC geared motor 132, including a motor bracket 131, the first DC geared motor 132, a retainer 133, a metal baffle 134, a blade adapter 135, blades 136, and springs 137. The first DC geared motor 132 is fixedly installed inside the motor bracket 131. The output end of the first DC geared motor 132 is rigidly connected to the retainer 133 coaxially. The blade adapter 135 is provided on the side of the retainer 133 away from the DC geared motor. The blade adapter 135 contains a pair of blades 136 and springs 137. The first wire stripper 130 and the second wire stripper 140 are arranged inside the frame 110 of the cable joint processing equipment along the cable feeding direction. They work together to strip the cable to expose the center conductor of a predetermined length. The two stripping processes are separated to avoid scratching the conductor.

[0034] like Figure 2 and Figure 6As shown, the cable clamp 150 is a flexible cable support mechanism. The cable clamp 150 includes a second DC geared motor 151, a lead screw 152, a nut slider 153, a pressing push rod 154, a clamping area plate 155, and clamps 156. The second DC geared motor 151 is fixedly installed on the frame 110. The output end of the second DC geared motor 151 is fixedly connected to the lead screw 152. The lead screw 152 is threadedly driven with the nut slider 153. The pressing push rod 154 is symmetrically arranged on the outer side of the nut slider 153. One side of the pressing push rod 154 is connected to the clamping area plate 155. Several clamps 156 are arranged on the side of the clamping area plate 155 away from the pressing push rod 154. The second DC geared motor 151 drives the lead screw 152 to rotate, which in turn drives the nut slider 153 to move axially along the lead screw 152. This pushes the pressing push rod 154, the wire clamping plate 155, and the clamp 156 to open and close synchronously. The clamp 156 clamps the connection area between the cable center conductor and the connector center pin, thus achieving welding positioning. This ensures that there is no relative displacement between the cable center conductor and the connector center pin during the welding process, preventing conductor misalignment and incomplete welding. This process eliminates the causes of welding defects from the front end and, together with the back end parameter adjustment, forms a quality control system.

[0035] Specifically, the visual characteristics for determining the quality grade of a weld joint are as follows: For the excellent grade, the appearance characteristics are full solder, good wetting, bright surface, and rounded shape. For the low solder grade, the visual characteristics are insufficient solder, small solder joints, and partial exposure of the substrate. For the grade of poor soldering, the visual characteristics are insufficient wetting, rough surface, grayish appearance, and weak bond between the solder joint and the substrate. For the solder excess level, the visual characteristics are solder accumulation, bulging, short circuits, or impaired assembly. For poor forming grade, the appearance judgment characteristics are uneven weld point shape, skewed shape, and the presence of pores or cracks.

[0036] Specifically, as shown in Table 1 below, this invention sets fixed increase / decrease ranges for each type of solder joint: for insufficient solder, only a small increase in solder feed; for cold solder joints, a small increase in temperature and delay; for solder pile-up, a simultaneous reduction in solder and time; and for poor forming, three parameters are adjusted in a coordinated manner. All adjustments have numerical boundaries to avoid waste of scrapped cables and soldering materials due to large parameter fluctuations, thereby reducing production losses and costs. The parameter correction strategy specifically includes: For low-tin grades, the soldering temperature and soldering time remain at the original soldering parameter values, while the solder feed amount is increased by 10% to 20%. For cold solder joints, maintain the original soldering parameters for the amount of solder applied, increase the soldering temperature by 10℃~20℃, and increase the soldering time by 0.2s~0.5s. For solder excess levels, maintain the original soldering parameters at the soldering temperature, reduce the solder feed by 10%~20%, and shorten the soldering time by 0.2s~0.5s. For grades with poor forming, increase the soldering temperature by 5℃~15℃, increase the solder feed by 5%~15%, and increase the soldering time by 0.2s~0.3s. For the excellent grade, the soldering temperature, solder feed rate, and soldering time remain at the original soldering parameter values.

[0037] Table 1 - Parameter Correction Strategy Illustration

[0038] In this embodiment, after the cable joint processing equipment is powered on, the operator first enters the system main interface through the serial port display screen 170 and selects the manual debugging mode. In this mode, the operator controls the first wire stripper 130, the second wire stripper 140, the wire clamp 150, and the soldering machine 160 to perform jogging tests to confirm that each mechanism is operating normally. After each actuator completes the verification, the operator switches to the automatic production mode through the serial port display screen 170 and inputs the specification information of the cable to be processed, such as the center conductor diameter of 0.5mm. After receiving the specification information, the system first searches the process database for the historical best welding parameters of the corresponding specification cable. When there is no corresponding record in the process database, the system calls the preset initial welding parameters as the current welding parameters, where the welding temperature is 340℃, the solder amount is 1.0mm, and the welding time is 1.5s. When there are historical best welding parameters for the corresponding specification in the process database, the system directly calls the set of parameters as the current welding parameters. Subsequently, the operator inserts the cable end into the first wire stripper 130 to remove the outer sheath, and then inserts the cable into the second wire stripper 140 to remove the inner insulation layer, exposing the center conductor to a predetermined length. After stripping, the operator installs the connector on the cable end and inserts the center conductor into the tail of the connector's center pin. Then, the operator starts the wire clamp 150 through the serial port display 170. The wire clamp 150 clamps and positions the cable and connector connection area to ensure that the connection position remains stable during the welding process. After clamping is completed, the operator starts the welding operation through the serial port display screen 170. The soldering machine 160 welds the cable center conductor and the tail of the connector center pin according to the currently set welding temperature, solder amount and welding time. After welding is completed, the operator visually inspects the solder joints and judges their condition based on their appearance. When the solder joint is full, well-wetted, has a bright surface, and is rounded, the operator judges it to be in excellent condition. When the solder joint is insufficient, small, or has part of the base material exposed, it is judged to be in low solder condition. When the solder joint is not fully bonded to the base material or is not sufficiently wetted, has a rough surface, or is grayish, it is judged to be in poor solder condition. When the solder accumulates, protrudes, short-circuits occur, or affects assembly, it is judged to be in excessive solder condition. When the solder joint is uneven in shape, skewed, or has defects such as pores or cracks, it is judged to be in poor condition. Based on actual observations, the operator selects the corresponding grade button on the quality grade interface of the serial port display 170. After receiving the grade information, the system converts the grade into the corresponding grade identifier and calls the parameter correction module 240 for calculation. For example, when the first sample is judged to be in a state of insufficient solder, the system increases the amount of solder fed according to the preset compensation rule, adjusting the amount of solder fed from 1.0mm to 1.15mm, while keeping the welding temperature and welding time unchanged. The system then re-executes the welding using the corrected parameters. When the second sample is welded, if the operator finds that the solder joint has insufficient wetting and judges it to be in a state of cold solder joint, the system further increases the welding temperature and extends the welding time, increasing the welding temperature from 340℃ to 355℃ and the welding time from 1.5s to 1.8s. As the number of samples increases, the system continuously receives manual evaluation results and continuously corrects the welding parameters according to the preset parameter correction strategy. When three consecutive samples are rated as excellent, the system considers the current welding parameters to have reached a stable state and stops further adjustments. At this point, the system determines the parameter set consisting of the current welding temperature, solder feed, and welding time as the optimal welding parameters for the current cable specification. After completing parameter optimization, the system stores the current cable specification and the corresponding optimal welding parameters in the process database. When processing cables of the same specification again, the system can directly call this set of optimal welding parameters as the initial welding parameters, thereby reducing the number of manual trial welds and improving the consistency of welding quality and production efficiency.

[0039] Through the above implementation process, the present invention realizes dynamic correction and optimization of welding parameters based on the results of manual quality assessment, so that the welding parameters can gradually approach the optimal state and form a process database applicable to cables of different specifications, thereby improving the stability and standardization level of cable joint welding quality.

[0040] Example 2

[0041] The difference from Example 1 is that, as in Example 2, ... Figure 7 and Figure 8As shown, the present invention also provides a method for adjusting welding parameters of a 2M coaxial cable joint based on quality assessment, applied to the coaxial cable 2M joint welding parameter adjustment system based on quality assessment shown in Embodiment 1 above, specifically including the following steps: Step S1: The operator enters the specifications of the cable to be processed through the serial port display screen. The system searches the process database in the process storage module 250. If there are no welding parameters for the corresponding cable specifications in the process database, the initial welding parameters are retrieved. If there are historical optimal welding parameters, they are directly retrieved as the current welding parameters. Before entering the specifications of the cable to be processed, step S1 includes a self-inspection step: the operator switches the system to manual debugging mode through the serial port display screen, controls the first wire stripper 130, the second wire stripper 140, the wire clamp 150 and the soldering machine 160 to perform jog tests, and confirms that there is no jamming in the transmission, lifting and soldering actions. Then, the operator switches the system to automatic production mode through the serial port display screen. The serial port display screen is equipped with a 3D printed hinge shell and has the function of switching between manual debugging mode and automatic production mode. In manual debugging mode, the actions of the wire stripper, wire clamp, soldering machine and other mechanisms can be jogged to check for jamming, abnormal soldering, positioning offset and other faults in advance. In automatic production mode, the entire process of entering cable specifications, retrieving welding parameters and entering solder joint quality level can be completed, reducing the risk of batch defective products caused by equipment failure. Step S2: Control the first wire stripper 130 and the second wire stripper 140 to strip the outer sheath and inner insulation layer of the cable in sequence, and control the wire clamp to clamp the connection area between the center conductor of the cable and the center pin of the connector to achieve welding positioning. Step S3: The welding execution module 210 receives the parameter setting instruction output by the parameter setting module 220, starts the soldering machine 160 according to the output welding parameters, and completes the soldering connection between the cable center conductor and the connector center pin. Step S4: The operator observes the condition of the weld joint after welding, evaluates the quality level of the weld joint, and enters the corresponding quality level of the weld joint through the serial port display screen. Step S5: The parameter correction module 240 receives the weld quality level output by the quality assessment module 230, retrieves the corresponding parameter correction strategy for matching, updates the welding parameters and sends them back to the parameter setting module 220. The parameter correction module 240 sends the corrected parameters to the parameter setting module 220. The parameter setting module 220 updates the current welding parameters, and the welding execution module 210 reads the latest welding parameters. Step S6: Repeat steps S2-S5 using the corrected welding parameters, iteratively correcting the welding parameters until the quality grade of the weld joints corresponding to three consecutive completed welds is evaluated as excellent. At this point, the parameter correction module 240 stops updating and adjusting the welding temperature, solder feed, and welding time. The system determines the current welding parameters as the optimal welding parameters and binds them to the corresponding cable specifications, storing them in the process database. The process database construction process is as follows: Figure 9 As shown.

[0042] In summary, this invention uses visual judgment criteria, namely five categories of solder joint quality levels, and matches them with a quantitative parameter correction strategy. It relies on manual on-site solder joint evaluation to achieve dynamic iterative optimization of welding temperature, solder delivery amount, and welding time. After multiple solder joints reach the excellent level, the optimal welding parameters for the corresponding cable specifications are automatically archived. This eliminates the need for visual inspection equipment and allows for process self-optimization through simple human-computer interaction. It effectively improves the problems of poor adaptability of traditional cable joint welding process parameters and lack of unified standards for parameter adjustment, and has good application prospects.

[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A coaxial cable 2M joint welding parameter adjustment system based on quality assessment, characterized in that, The system is applied to cable joint processing equipment, which includes a frame. Inside the frame are a switching power supply, a first wire stripper, a second wire stripper, wire clamps, and a soldering machine. A serial port display screen is installed on the top of the frame. The first wire stripper is used to strip the outer sheath of the cable, the second wire stripper is used to strip the inner insulation layer of the cable to expose the central conductor, the wire clamps are used to clamp and position the connection area between the central conductor of the cable and the central pin of the joint, and the serial port display screen is used to perform parameter input, working mode switching, and solder joint quality level input operations. The system includes a welding execution module with signal interaction, a parameter setting module, a quality evaluation module, a parameter correction module, and a process storage module. The welding execution module has a built-in heating submodule, a solder feeding module, and a welding head submodule. It is used to receive parameter setting instructions output by the parameter setting module and cooperate with the soldering machine to complete the soldering connection between the cable center conductor and the connector center pin. The parameter setting module is electrically connected to the serial port display screen and is used to input cable specifications and set welding parameters. The welding parameters include three types of adjustable variables: welding temperature, solder amount, and welding time. The quality assessment module is electrically connected to the serial port display screen, and is used by the operator to observe the state of the solder joints after soldering, evaluate the quality level of the solder joints and record it. The quality level of the solder joints is divided into five categories: excellent, insufficient solder, cold solder joint, excessive solder, and poor forming. The parameter correction module is used to pre-store the parameter correction strategy corresponding to each solder joint quality level, receive the solder joint quality level output by the quality assessment module, and adjust the welding temperature, solder feed amount and welding time according to the corresponding parameter correction strategy, and output the corrected welding parameters back to the parameter setting module. The process storage module is used to store cable specifications, original welding parameters, welding parameters after each correction, parameter correction records, and optimal welding parameters, forming a process database for the parameter setting module to retrieve historical optimal welding parameters.

2. The coaxial cable 2M joint welding parameter adjustment system based on quality assessment according to claim 1, characterized in that, The soldering machine includes a stepper motor, a fixed bracket, a soldering iron, and a solder wire feeding hole. The stepper motor is mounted on the frame via the fixed bracket and is used to drive the soldering iron to move and drive the solder wire feeding hole to feed solder. The solder wire feeding hole is located on one side of the soldering iron and is used to position the solder wire delivery path to match the soldering iron's working position. The soldering iron is electrically connected to the heating submodule and works together to adjust the soldering temperature. The stepper motor is electrically connected to the solder feeding submodule and the soldering head submodule, and works with the soldering iron and the solder wire feeding hole to adjust the soldering time and the amount of solder fed.

3. The coaxial cable 2M joint welding parameter adjustment system based on quality assessment according to claim 1, characterized in that, Both the first and second wire strippers are configured with a wire stripping head structure driven by a first DC geared motor, including a motor bracket, a first DC geared motor, a retainer, a metal baffle, a blade adapter, blades, and springs. The first DC geared motor is fixedly installed inside the motor bracket, and the output end of the first DC geared motor is rigidly connected to the retainer coaxially. The retainer has a blade adapter on the side away from the DC geared motor, and the blade adapter houses a pair of blades and springs. The first and second wire strippers are arranged inside the frame of the cable joint processing equipment along the cable feeding direction, and work together to strip the cable to expose the center conductor of a predetermined length.

4. The coaxial cable 2M joint welding parameter adjustment system based on quality assessment according to claim 1, characterized in that, The wire clamp includes a second DC geared motor, a lead screw, a nut slider, a pressing push rod, a wire clamping area plate, and clamps. The second DC geared motor is fixedly mounted on the frame, and the output end of the second DC geared motor is fixedly connected to the lead screw. The lead screw is threadedly driven to the nut slider. The outer side of the nut slider is symmetrically provided with pressing push rods. One side of the pressing push rod is connected to the wire clamping area plate, and several clamps are provided on the side of the wire clamping area plate away from the pressing push rod. The second DC geared motor drives the lead screw to rotate, which in turn drives the nut slider to move axially along the lead screw, pushing the pressing rod, the wire clamping plate, and the clamp to open and close synchronously. The clamp clamps the connection area between the center conductor of the cable and the center pin of the connector, thereby achieving welding positioning.

5. The coaxial cable 2M joint welding parameter adjustment system based on quality assessment according to claim 1, characterized in that, The visual characteristics for determining the quality grade of the weld point are as follows: For the excellent grade, the appearance characteristics are: full solder, good wetting, bright surface, and rounded shape. For the low solder level, the appearance characteristics are: insufficient solder, small solder joints, and partial exposure of the substrate. For the grade of poor soldering, the appearance characteristics are: insufficient wetting, rough surface, graying, and weak bonding between the solder joint and the substrate. For the solder excess level, the appearance characteristics are solder accumulation, bulging, short circuit, or other issues affecting assembly. For the poor forming grade, the appearance judgment characteristics are indicated as uneven weld point shape, skewness, and the presence of pores or cracks.

6. The coaxial cable 2M joint welding parameter adjustment system based on quality assessment according to claim 1, characterized in that, The parameter correction strategy specifically includes: For low tin grades, the welding temperature and welding time remain at the original welding parameter values, while the tin feed amount is increased by 10% to 20%. For the cold solder joint level, the amount of solder delivered remains the same as the original soldering parameters, the soldering temperature is increased by 10℃~20℃, and the soldering time is increased by 0.2s~0.5s. For the solder excess level, the soldering temperature is maintained at the original soldering parameter value, the solder feed amount is reduced by 10%~20%, and the soldering time is shortened by 0.2s~0.5s; For the defective forming grade, the soldering temperature is increased by 5℃~15℃, the solder feed amount is increased by 5%~15%, and the soldering time is increased by 0.2s~0.3s; For the excellent grade, the welding temperature, solder feed rate, and welding time are all maintained at the original welding parameter values.

7. The coaxial cable 2M joint welding parameter adjustment system based on quality assessment according to claim 1, characterized in that, The welding parameter setting logic of the parameter setting module is as follows: after the cable specification is entered, the process database in the process storage module is searched in advance. If a matching record exists, the optimal welding parameters are loaded directly. If no matching record exists, the system's built-in initial welding parameters are called. The initial welding parameters are set as follows: welding temperature is 340℃, solder feed is 1.0mm, and welding time is 1.5s.

8. The coaxial cable 2M joint welding parameter adjustment system based on quality assessment according to claim 1, characterized in that, The logic for determining the optimal welding parameters is as follows: for test welding samples of the same cable specification, if the quality level of the weld points corresponding to the weld points of three consecutive welded samples is excellent, the current welding temperature, solder feed amount, and welding time are determined to be the optimal welding parameters for the cable specification.

9. A method for adjusting welding parameters of a 2M coaxial cable joint based on quality assessment, applied to the coaxial cable 2M joint welding parameter adjustment system based on quality assessment as described in any one of claims 1-8, characterized in that, Specifically, the following steps are included: Step S1: The operator enters the specifications of the cable to be processed through the serial port display screen. The system searches the process database in the process storage module. If there are no welding parameters for the corresponding cable specifications in the process database, the initial welding parameters are retrieved. If there are historical best welding parameters, they are directly retrieved as the current welding parameters. Step S2: Control the first wire stripper and the second wire stripper to strip the outer sheath and inner insulation layer of the cable in sequence, and control the wire clamp to clamp the connection area between the center conductor of the cable and the center pin of the connector to achieve welding positioning; Step S3: The welding execution module receives the parameter setting instruction output by the parameter setting module, starts the soldering machine according to the output welding parameters, and completes the soldering connection between the cable center conductor and the connector center pin. Step S4: The operator observes the condition of the weld joint after welding, evaluates the quality level of the weld joint, and enters the corresponding quality level of the weld joint through the serial port display screen. Step S5: The parameter correction module receives the weld quality level output by the quality assessment module, retrieves the corresponding parameter correction strategy for matching, updates the welding parameters, and sends them back to the parameter setting module. Step S6: Repeat steps S2 to S5 using the corrected welding parameters, continuously iterating and correcting the welding parameters until the quality level of the weld points corresponding to the three consecutive welded weld points is evaluated as excellent. At this point, the parameter correction module stops updating and adjusting the welding temperature, solder feed, and welding time. The system determines the current welding parameters as the optimal welding parameters and binds them to the corresponding cable specifications and stores them in the process database.

10. The method for adjusting welding parameters of a 2M coaxial cable joint based on quality assessment according to claim 9, characterized in that, Before entering the specifications of the cable to be processed, step S1 also includes a self-test step: the operator switches the system to manual debugging mode through the serial port display screen, controls the first wire stripper, the second wire stripper, the wire clamp and the soldering machine to perform jog tests, and confirms that there is no jamming in the transmission, lifting and soldering actions. Then, the operator switches the system to automatic production mode through the serial port display screen.

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