Low-heating-mode cable shielding layer welding method and device and electronic equipment

Abstract

The invention provides a low-heating-mode cable shielding layer welding method and device and electronic equipment. The method comprises the steps that a protective layer at one end of a cable is stripped to form a stepped cable head, and the cable comprises the protective layer, an armor layer and a shielding layer; placing the cable head at the position of an internal stepped groove of the current welding machine, clamping the cable head with the welding clamping position, and controlling the ground wire to be in contact with an armor layer and a shielding layer of the cable head; and a welding switch of the current welding machine is started, and a probe of the current welding machine is adopted to carry out welding treatment on the ground wire and the armor layer and carry out welding treatment on the ground wire and the shielding layer. The problem that a traditional secondary control cable shielding layer welding method is low in efficiency is solved.

Description

Technical Field

[0001] The present application relates to the technical field of low-heat-generating cable shielding layer welding, and in particular to a low-heat-generating cable shielding layer welding method, a computer-readable storage medium, and an electronic device. Background Art

[0002] The main function of welding the ground wire of the shielding layer of the secondary control cable is to prevent electromagnetic interference and protect the stability and safety of signal transmission. By welding the shielding layer to the ground wire, unnecessary electromagnetic waves can be effectively filtered out to prevent interference signals from entering the inner conductor and interfering. At the same time, short-circuit current can also be introduced into the earth to prevent cable damage. Specifically, the functions of welding the shielding layer to the ground wire include the following aspects: preventing electromagnetic interference, reducing signal leakage, improving cable durability, and grounding protection. Traditional armor layers and shielding layers are usually connected to the ground wire by manual tin melting with an electric soldering iron.

[0003] The traditional welding method of the shield layer of the secondary control cable is inefficient. In addition, due to the presence of oxidized surfaces on the surface of the armor layer and the shield layer, it is difficult to connect the ground wire to the armor layer and the shield layer, which poses a risk of cold soldering. In addition, the soldering iron can easily melt the inner core protective cover, causing damage to the wire core insulation, leaving hidden dangers of short circuits and grounding between wires, threatening the safety of power production. Summary of the invention

[0004] The main purpose of the present application is to provide a cable shielding layer welding method in a low-heating manner, a computer-readable storage medium and an electronic device, so as to at least solve the problem of low efficiency of the traditional secondary control cable shielding layer welding method.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a low-heat-generating cable shielding layer welding method is provided, comprising: peeling off the protective layer at one end of the cable to form a stepped cable head, wherein the cable comprises a protective layer, an armor layer, and a shielding layer; placing the cable head at the internal stepped groove position of the current welding machine, and engaging the cable head with the welding clamp, and controlling the ground wire to contact the armor layer and the shielding layer of the cable head; starting the welding switch of the current welding machine, and using the probe of the current welding machine to weld the ground wire to the armor layer, and welding the ground wire to the shielding layer.

[0006] Optionally, after using the probe of the current welding machine to weld the ground wire to the armor layer, and after using the ground wire to the shielding layer, the method further includes: performing signal welding detection on the welding position by ultrasonic detection to obtain pulse signal detection data, wherein the pulse signal detection data includes pulse signal receiving time, pulse signal width, pulse signal frequency and pulse signal amplitude; and determining the welding quality of the welding position at least based on the pulse signal inspection data.

[0007] Optionally, determining the welding quality of the welding position at least according to the pulse signal inspection data includes: determining a welding surface quality observation value according to the welding position, wherein the welding surface quality observation value includes 1, 50, and 100; and using a first formula: Determine the welding quality score of the welding position, and determine the welding quality of the welding position according to the welding quality score, wherein S is the welding quality score, w1 is the welding surface quality observation value, f is the pulse signal frequency, t is the pulse signal receiving time, A is the pulse signal amplitude, and β1, β2, and β3 are weight coefficients.

[0008] Optionally, the ground wire and the armor layer are welded using a probe of the current welder, including: obtaining a given pulse voltage for welding by the current welder, and determining a control voltage for welding by the current welder using a given signal transformation method according to the given pulse voltage; determining a pulse current according to the control voltage, and welding the ground wire and the armor layer using the probe of the current welder according to the pulse current.

[0009] Optionally, obtaining a given pulse voltage for welding by the current welding machine includes: controlling a pulse generator to generate a rectangular pulse with a preset duty cycle, and separating the rectangular pulse into a control pulse of a pulse time and a base value time; using the control pulse of the pulse time and the base value time as a switching signal to control the pulse given time and the base value given time corresponding to the given pulse voltage; obtaining a pulse amplitude given value and a pulse base value given value, and generating the given pulse voltage according to the pulse given time, the base value given time, the pulse amplitude given value and the base value given value.

[0010] Optionally, the signal welding detection is performed on the welding position by ultrasonic detection to obtain the pulse signal amplitude in the pulse signal detection data, including: according to the second formula: The pulse signal amplitude A is determined, wherein Atransmit is the amplitude of the transmitted pulse signal, and Areceive is the amplitude of the received pulse signal.

[0011] Optionally, the signal welding detection is performed on the welding position by ultrasonic detection to obtain the pulse signal frequency in the pulse signal detection data, including: according to the third formula: Determine the pulse signal frequency f, where f 发射 is the frequency of the transmitted pulse signal, f 接收 is the frequency of the received pulse signal.

[0012] Optionally, determining the welding quality of the welding position according to the welding quality score includes: determining whether the welding quality score is greater than a preset quality score; and generating an alarm signal when the welding quality score is less than or equal to the preset quality score, wherein the alarm signal is used to remind that the welding quality of the welding position is unqualified.

[0013] According to another aspect of the present application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute any one of the cable shielding layer welding methods in a low-heating manner.

[0014] According to another aspect of the present application, an electronic device is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a method for performing any one of the low-heat-generating cable shielding welding methods.

[0015] The technical solution of the present application is applied, the protective layer of one end of the cable is stripped to form a stepped cable head, wherein the cable includes a protective layer, an armor layer, and a shielding layer; the cable head is placed at the internal stepped groove position of the current welding machine, and the cable head is clamped with the welding position, and the ground wire is controlled to contact with the armor layer and the shielding layer of the cable head; the welding switch of the current welding machine is started, and the probe of the current welding machine is used to weld the ground wire and the armor layer, and the ground wire and the shielding layer. By stripping one end of the cable into a stepped shape and placing it in the stepped groove of the current welding machine, the current welding machine is used for local heating, and the connection position can be accurately heated and welded, which can reduce deformation and welding stress. The welding position is heated and cooled quickly, and the welding quality is high. Even if the metal surface of the cable head is rusted, the contact surface resistance increases, which is more conducive to generating local high temperature, completing welding, and avoiding cold welding. Therefore, the metal corrosion caused by surface oxidation will not only not produce cold welding, but make the current welding more firm. The problem of low efficiency of the traditional secondary control cable shielding layer welding method is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 A schematic flow chart of a cable shielding layer welding method in a low-heating manner provided in accordance with an embodiment of the present application is shown;

[0018] Figure 2 A specific cable head structure diagram provided according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of placing cables inside a current welding machine according to an embodiment of the present application is shown;

[0020] Figure 4 A schematic flow chart of a cable shielding layer welding method in a specific low-heating manner provided in an embodiment of the present application is shown;

[0021] Figure 5 A schematic diagram of the structure of a current welding machine and a probe thereof provided according to an embodiment of the present application is shown;

[0022] Figure 6 A schematic diagram of the internal probe structure of a current welding machine provided according to an embodiment of the present application is shown;

[0023] Figure 7 A circuit diagram of a non-destructive welding unit provided according to an embodiment of the present application is shown;

[0024] Figure 8 A pulse setting principle block diagram according to an embodiment of the present application is shown;

[0025] Fig. 9 A schematic diagram of a pulse setting circuit provided according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] As introduced in the background technology, the traditional secondary control cable shielding layer welding method is inefficient. In order to solve the problem of low efficiency of the traditional secondary control cable shielding layer welding method, the embodiments of the present application provide a low-heating cable shielding layer welding method, a computer-readable storage medium and an electronic device.

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] Figure 1 FIG. 1 is a flow chart of a cable shielding layer welding method in a low-heating manner according to an embodiment of the present application. Figure 1 As shown, the method comprises the following steps:

[0032] Step S101, peeling off the protective layer of one end of the cable to form a stepped cable head, wherein the cable comprises a protective layer, an armor layer, and a shielding layer;

[0033] The specific cable head structure diagram is as follows Figure 2 As shown, it specifically includes a polyvinyl chloride outer protective sheath, a steel armor layer, an inner protective sheath, a copper shielding layer, a fiber layer and a cable core.

[0034] Specifically, one end of the cable is stripped into a stepped shape, exposing the armor layer and the shielding layer, and placed in the stepped groove of the current welding machine, such as Figure 3 As shown. Local heating by current welding machine can accurately heat and weld the connection position, reduce deformation and welding stress, and the welding position is heated and cooled quickly. The ultrasonic detector is connected to the cable to observe and detect the quality of the welding position, which can help grasp the welding quality of non-destructive welding, help reduce the defective rate, and improve the welding quality. The high welding quality can timely rust the metal surface of the cable head and increase the contact surface resistance, which is more conducive to generating local high temperature, completing welding, and avoiding false welding.

[0035] Step S102, placing the cable head at the internal stepped groove position of the current welding machine, and clamping the cable head with the welding clamp, and controlling the ground wire to contact with the armor layer and the shielding layer of the cable head;

[0036] Specifically, the current welding machine has a stepped groove inside, which can adapt to the stepped shape of the cable stripping, so that the welding point can quickly and accurately contact the welding point after the cable is placed inside the current welding machine, saving adjustment time and improving work efficiency.

[0037] Step S103, starting the welding switch of the current welding machine, using the probe of the current welding machine to weld the ground wire and the armor layer, and welding the ground wire and the shielding layer.

[0038] Specifically, when the welding switch is triggered, the non-destructive welding unit of the current welding machine first generates a high-frequency current through a high-frequency power supply, and then transmits the high-frequency current to the welding head; when the welding head is close to the armor layer, the shielding layer and the ground wire, the high-frequency current generates a strong electromagnetic field between the welding head and the three, forming an induced current to generate local high temperature on the surface of the workpiece, so that the contact surface is quickly heated to a molten state; the heat is quickly conducted to the metal on the contact surface, realizing local melting welding, and in the molten state, the mutual diffusion and bonding force between metal atoms are enhanced to form a metallurgical bond; as the high-frequency current stops, the heat in the welding part is quickly dissipated, so that the molten metal is quickly cooled and solidified to achieve a welding connection.

[0039] Specifically, the current welding technology is adopted, and its non-destructive welding unit has the characteristics of local heating, which makes the heat affected zone in the welding process smaller. The high-power energy is used to instantly melt the shielding layer, armor layer and ground wire in a very short time, reducing welding deformation and residual stress, ensuring firm welding. At the same time, due to the fast heating speed and rapid cooling, the weld structure is refined and the welding quality is high, which effectively reduces the low efficiency and poor quality of manual welding of ground wires.

[0040] Through this embodiment, the protective layer of one end of the cable is stripped to form a stepped cable head, wherein the cable includes a protective layer, an armor layer, and a shielding layer; the cable head is placed at the internal stepped groove position of the current welding machine, and the cable head is clamped with the welding position, and the ground wire is controlled to contact the armor layer and the shielding layer of the cable head; the welding switch of the current welding machine is started, and the probe of the current welding machine is used to weld the ground wire and the armor layer, and the ground wire and the shielding layer. By stripping one end of the cable into a stepped shape and placing it in the stepped groove of the current welding machine, the current welding machine is used for local heating, and the connection position can be accurately heated and welded, which can reduce deformation and welding stress. The welding position is heated and cooled quickly, and the welding quality is high. Even if the metal surface of the cable head is rusted, the contact surface resistance is increased, which is more conducive to generating local high temperature, completing welding, and avoiding cold welding. Therefore, the metal corrosion caused by surface oxidation will not only not produce cold welding, but make the current welding more firm. The problem of low efficiency of the traditional secondary control cable shielding layer welding method is solved.

[0041] Among them, the working principle of the lossless welding unit is mainly based on electromagnetic induction and the thermal effect of high-frequency current. The lossless welding unit first generates high-frequency current through a high-frequency power supply, and then transmits the high-frequency current to the welding head. When the welding head is close to the armor layer, the shielding layer and the ground wire, the high-frequency current generates a strong electromagnetic field between the welding head and the three. This electromagnetic field forms a circular current, that is, an induced current. The induced current generates local high temperature on the surface of the workpiece, so that the contact surface is quickly heated to a molten state. Due to the extremely fast heating speed, the heat is quickly conducted to the metal on the contact surface, while the surrounding metal structure maintains a relatively low temperature, thereby realizing local melting welding. In the molten state, the mutual diffusion and bonding force between metal atoms are enhanced to form a metallurgical bond. As the high-frequency current stops, the heat in the welding area dissipates rapidly, causing the molten metal to quickly cool and solidify, thereby realizing a welding connection.

[0042] In the specific implementation process, after using the probe of the above-mentioned current welding machine to weld the above-mentioned ground wire and the above-mentioned armor layer, and after welding the above-mentioned ground wire and the above-mentioned shielding layer, the above-mentioned method also includes: using ultrasonic detection to perform signal welding detection on the welding position to obtain pulse signal detection data, wherein the above-mentioned pulse signal detection data includes pulse signal receiving time, pulse signal width, pulse signal frequency and pulse signal amplitude; at least determine the welding quality of the above-mentioned welding position based on the above-mentioned pulse signal inspection data.

[0043] This method connects an ultrasonic detector to a cable, transmits a pulse signal at one end of the cable welding position, receives the pulse signal at the other end of the cable welding position, and monitors the pulse signal passing through the welding position in real time. The transmitted pulse signal is compared with the received pulse signal to determine the cable welding quality.

[0044] Specifically, determining the welding quality of the welding position at least according to the pulse signal inspection data includes: determining a welding surface quality observation value according to the welding position, wherein the welding surface quality observation value includes 1, 50, and 100; using a first formula: Determine the welding quality score of the above welding position, and determine the above welding quality of the above welding position based on the above welding quality score, wherein S is the above welding quality score, w1 is the above welding surface quality observation value, f is the above pulse signal frequency, t is the above pulse signal receiving time, A is the above pulse signal amplitude, β1, β2, β3 are weight coefficients.

[0045] This method can help grasp the welding quality of non-destructive welding by observing and testing the quality of the welding position, help operators understand the welding effect of non-destructive welding, and promptly detect the existence of cold welds, thereby helping to reduce the defective rate and improve welding quality.

[0046] Among them, t is the calculated value of the receiving time, and the specific calculation formula is: Among them, t 理 is the theoretical receiving time of the pulse signal, t 实 It is the actual receiving time of the pulse signal.

[0047] More specifically, the ground wire and the armor layer are welded using the probe of the current welding machine, including: obtaining a given pulse voltage for welding by the current welding machine, and determining a control voltage for welding by the current welding machine using a given signal conversion method according to the given pulse voltage; determining a pulse current according to the control voltage, and welding the ground wire and the armor layer using the probe of the current welding machine according to the pulse current.

[0048] This method uses current welding technology, and its non-destructive welding unit has the characteristics of local heating, which makes the heat affected zone during welding smaller. High-power energy is used to instantly melt the shielding layer, armor layer and ground wire in a very short time, reducing welding deformation and residual stress, ensuring firm welding. At the same time, due to the fast heating speed and rapid cooling, the weld structure is refined and the welding quality is high, which effectively reduces the low efficiency and poor quality of manual welding of ground wires.

[0049] The circuit of the lossless welding unit adopts a given signal conversion method to obtain pulse current. The given circuit output is a given pulse voltage, which continuously switches the external characteristics of the thyristor arc welding rectifier, thereby achieving the purpose of pulse output and realizing the integration of pulse current and arc maintenance power supply.

[0050] In the circuit of the non-destructive welding unit, the quantitative relationship between the output current If and the given pulse voltage Ug is:

[0051] U k =K(U g -nI f )

[0052] U k ≤0.6V

[0053] K(U g -nI j )≈0

[0054] I f ≈U g / n

[0055] Among them, I f is the output current, U g For a given pulse voltage, U k is the control voltage, since U g For a given pulse voltage, I f With U g The pulse of welding current is controlled by the given pulse voltage U g The control circuit of the external characteristic is obtained by current negative feedback. The welding current is sampled and amplified by the shunt and then compared with the given pulse voltage U g Compare and then amplify to output control voltage U k .

[0056] In addition, during the welding process of the current welding machine, the resistance on the metal contact surface is relatively large. When a large current passes through it instantly, local high temperature will be generated to melt the metal and complete the welding. When the metal surface rusts, its contact resistance increases, which is more conducive to generating local high temperature and completing the welding. Therefore, the metal rust caused by surface oxidation will not only not cause cold welding, but make the current welding more solid.

[0057] Furthermore, obtaining the given pulse voltage for welding by the above-mentioned current welding machine includes: controlling the pulse generator to generate a rectangular pulse with a preset duty cycle, and separating the above-mentioned rectangular pulse into a control pulse of a pulse time and a base value time; using the above-mentioned control pulse of the pulse time and the base value time as a switching signal to control the pulse given time and the base value given time corresponding to the above-mentioned given pulse voltage; obtaining the pulse amplitude given value and the pulse base value given value, and generating the above-mentioned given pulse voltage according to the above-mentioned pulse given time, the above-mentioned base value given time, the above-mentioned pulse amplitude given value and the above-mentioned base value given value.

[0058] Among them, the preset duty cycle is 50%;

[0059] The method is based on the pulse setting principle. A pulse generator generates a rectangular pulse with a duty cycle of 50%, which is modulated into a rectangular pulse with an equal period and an adjustable duty cycle by a pulse width modulator, and then separated into control pulses of pulse time and base value time. These two pulses are used as switching signals to control the pulse given time and base value given time corresponding to the given pulse voltage Ug. Finally, the pulse amplitude given value and the base value given value are synthesized into the required given pulse by an adder. The given pulse is used as a signal for adjusting the thyristor trigger angle of the main circuit.

[0060] Furthermore, the signal welding detection is performed on the welding position by ultrasonic detection to obtain the pulse signal amplitude in the pulse signal detection data, including: according to the second formula: Determine the pulse signal amplitude A, wherein Atransmit is the amplitude of the transmitted pulse signal, and Areceive is the amplitude of the received pulse signal.

[0061] Specifically, the signal welding detection is performed on the welding position by ultrasonic detection to obtain the pulse signal frequency in the pulse signal detection data, including: according to the third formula: Determine the frequency f of the above pulse signal, where f 发射 is the frequency of the transmitted pulse signal, f 接收 is the frequency of the received pulse signal.

[0062] More specifically, determining the welding quality of the welding position according to the welding quality score includes: determining whether the welding quality score is greater than a preset quality score; and generating an alarm signal when the welding quality score is less than or equal to the preset quality score, wherein the alarm signal is used to remind that the welding quality of the welding position is unqualified.

[0063] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the implementation process of the low-heat-generating cable shielding layer welding method of the present application will be described in detail below in conjunction with specific embodiments.

[0064] This embodiment relates to a specific low-heat-generating cable shielding layer welding method, such as Figure 4 As shown, the following steps are included:

[0065] Step S1: peel off the protective layer at one end of the cable to form a step shape, and take out the processed cable head;

[0066] Step S2: placing the cable head stripped into a stepped shape in the stepped groove position inside the current welding machine, and clamping the cable head with the welding clamping position;

[0067] Step S3: The welding switch is triggered, and the non-destructive welding unit of the current welding machine first generates a high-frequency current through a high-frequency power supply, and then transmits the high-frequency current to the welding head;

[0068] Step S4: When the welding head is close to the armor layer, the shielding layer and the ground wire, the high-frequency current generates a strong electromagnetic field between the welding head and the three, forming an induced current to generate local high temperature on the surface of the workpiece, so that the contact surface is quickly heated to a molten state;

[0069] Step S5: The heat is quickly transferred to the metal on the contact surface, achieving local melting welding. In the molten state, the mutual diffusion and bonding force between the metal atoms are enhanced to form a metallurgical bond;

[0070] Step S6: As the high-frequency current stops, the heat in the welding area dissipates rapidly, causing the molten metal to cool and solidify rapidly, thereby achieving welding connection.

[0071] Figure 5 It is a schematic diagram of the structure of the current welding machine and its probe. Figure 6 It is a schematic diagram of the internal probe structure of the current welding machine. Figure 5 and Figure 6 As shown, the current welding process is used to avoid high temperature damage to the inner core during welding. The current welding technology has a small high temperature area, fast heat dissipation, and firm welding. The high-power energy is used to instantly melt the shielding layer, armor layer, and ground wire in a very short time, reducing the stress generated by the shielding layer, armor layer, and ground wire during heating and cooling, which causes cable deformation, ensuring that the armor layer and shielding layer are firmly welded to the ground wire. Compared with traditional electric soldering iron tin melting welding, it is more efficient;

[0072] like Figure 3 As shown, the current welding machine has a stepped groove inside, which can adapt to the stepped shape of the cable stripping, so that the welding point can quickly and accurately contact the welding point after the cable is placed inside the current welding machine, saving adjustment time and improving work efficiency;

[0073] The armor layer and the shielding layer ground wire lossless welding unit adopts the induction cold welding method, which uses the induction current to generate instantaneous heating on the surface of the metal workpiece to achieve welding. Its working principle is based on electromagnetic induction and the thermal effect of high-frequency current. The lossless welding unit first generates high-frequency current through a high-frequency power supply, and then transmits the high-frequency current to the welding head. When the welding head is close to the armor layer, the shielding layer and the ground wire, the high-frequency current generates a strong electromagnetic field between the welding head and the three. This electromagnetic field forms a circular current, that is, an induction current. The induction current generates local high temperature on the surface of the workpiece, so that the contact surface is quickly heated to a molten state. Due to the extremely fast heating speed, the heat is quickly transferred to the metal on the contact surface, while the surrounding metal structure maintains a relatively low temperature, thereby achieving local melting welding. In the molten state, the mutual diffusion and bonding force between metal atoms are enhanced to form a metallurgical bond. As the high-frequency current stops, the heat in the welding part is quickly dissipated, so that the molten metal is quickly cooled and solidified, thereby achieving a welding connection;

[0074] like Figure 7 As shown, the circuit adopts the given signal conversion method to obtain the pulse current, and the given circuit outputs a pulse given voltage, which continuously switches the external characteristics of the thyristor arc welding rectifier, thereby achieving the purpose of pulse output and realizing the integration of pulse current and arc maintenance power supply;

[0075] Depend on Figure 7 The output current I f And given pulse voltage U g The quantitative relationship is:

[0076] Among them, I f is the output current, U g For a given pulse voltage, U k is the control voltage;

[0077] Because U g For a given pulse voltage, I f With U g This shows that the pulse of welding current is controlled by the given pulse voltage U g The external characteristic control circuit is obtained by current negative feedback. The welding current is sampled and amplified by the shunt and then compared with the given pulse voltage U g Compare and then amplify to output control voltage U k ;

[0078] After welding is completed, the welding quality of the welding position is tested by ultrasonic testing; the ultrasonic detector is connected to the cable, a pulse signal is emitted at one end of the cable welding position, and the pulse signal is received at the other end of the cable welding position to monitor the pulse signal passing through the welding position in real time. The emitted pulse signal is compared with the received pulse signal to judge the cable welding quality; the welding position surface is first observed to determine the welding position observation value w1, which is 1, 50, and 100. The larger the value, the better the welding quality observed on the welding position surface; the emitted pulse signal propagates along the welding position, and the relevant data of the received signal is measured, including the signal receiving time, signal width, frequency and amplitude. The welding quality detection value S is calculated based on the above data, and the value is [1,100]. The specific calculation formula is as follows:

[0079]

[0080] Among them, Β1 is the weight coefficient of frequency, which is taken as 0.3 here by comprehensive consideration of the experience of experts in welding quality and pulse signal propagation; β2 is the weight coefficient of receiving time, which is taken as 0.4 here by comprehensive consideration of the experience of experts in welding quality and pulse signal propagation; β3 is the weight coefficient of amplitude, which is taken as 0.3 here by comprehensive consideration of the experience of experts in welding quality and pulse signal propagation;

[0081] f is the calculated frequency value, and the specific calculation formula is: Among them, f 发射 is the frequency of the transmitted pulse signal; f 接收 is the frequency of the received signal.

[0082] t is the calculated value of the receiving time, and the specific calculation formula is: Among them, t 理 is the theoretical receiving time of the pulse signal, t 实 It is the actual receiving time of the pulse signal.

[0083] A is the amplitude calculation value, and the specific calculation formula is: Among them, A 发射 is the amplitude of the transmitted pulse signal, A 接收 is the amplitude of the received signal.

[0084] The larger the welding quality detection value S is, the better the welding quality is. By observing and detecting the quality of the welding position, it can help to grasp the welding quality of non-destructive welding, help operators understand the welding effect of non-destructive welding, and promptly detect the existence of cold welds, which helps reduce the defective rate and improve the welding quality.

[0085] like Figure 8As shown in the figure, according to the pulse setting principle, a pulse generator generates a rectangular pulse with a duty cycle of 50%, which is modulated into a rectangular pulse with an equal period and adjustable duty cycle by a pulse width modulator, and then separated into a control pulse of pulse time and base value time. These two pulses are used as switching signals to control the given pulse voltage U g The corresponding pulse given time and base value given time, and finally the pulse amplitude given value and the base value given value are synthesized into the required given pulse by the adder, and the given pulse is used as the signal for adjusting the trigger angle of the thyristor of the main circuit;

[0086] like Fig. 9 As shown, the lossless welding unit is based on the pulse setting principle. In the pulse setting circuit, the ±15V power supply is connected to the triangular wave generator composed of a comparison circuit and an integral operation circuit. Resistors R3, R4, R5 and potentiometer RP1 together form a voltage divider circuit. The appropriate potential is obtained by adjusting RP1, which is input to the inverting input terminal of the operational amplifier A1 through R4, and a square wave is output at its output terminal. After being limited by VS7 and VS8, a rectangular wave is generated. This rectangular wave is input to the inverting input terminal of the operational amplifier A2 through VD9 and R8, and a triangular wave can be output at its output terminal. The potentiometer RP2 is used to achieve the purpose of adjustable frequency.

[0087] Triangle wave U i By R 11 Enter the inverting input terminal of operational amplifier A3 and obtain the comparison voltage U from RP3 r , by R 12 Entering the in-phase input terminal of A3, the potentiometer RP3 can realize the adjustable pulse width, and the rectangular wave with adjustable pulse width is output at A4. 14 Then divided into two parts:

[0088] Part of the pulse positive voltage passes through resistor R 15 Send it to two NOT gates, and adjust the pulse amplitude by adjusting the potentiometer RP5;

[0089] The other part of the pulse negative voltage passes through the resistor R 16 After being sent to the NOT gate, the pulse is inverted again, changing from the original negative pulse to a positive pulse. By adjusting RP4, the purpose of adjusting the pulse base value can be achieved.

[0090] The two pulses pass through diode VD 11 、VD 12 Synthesize to form a pulse given signal U g The pulse is used as the pulse given signal for adjusting the negative feedback link of the thyristor current in the main circuit. Since the pulse generator frequency is adjustable, the pulse width of the pulse width modulator is adjustable, the pulse given and the base value given are adjustable, the synthesized pulse given signal U gThe four parameters of the main circuit thyristor output pulse current are adjustable, and the parameters of the main circuit thyristor output pulse current are also adjustable, thus realizing the pulse output of the arc welding power supply.

[0091] The non-destructive welding unit has the characteristic of local heating, which makes the heat affected zone in the welding process smaller, reduces welding deformation and residual stress. At the same time, due to the fast heating speed and rapid cooling, the weld structure is refined and the welding quality is high, which effectively reduces the low efficiency and poor quality of manual welding ground wire;

[0092] During the welding process of the current welding machine, the resistance on the metal contact surface is relatively large. When a large instantaneous current passes through, local high temperature will be generated to melt the metal and complete the welding. When the metal surface rusts, its contact resistance increases, which is more conducive to generating local high temperature and completing the welding. Therefore, the metal rust caused by surface oxidation will not only not cause cold welding, but make the current welding more solid.

[0093] This embodiment adopts the current welding technology, and its non-destructive welding unit has the characteristic of local heating, so that the heat affected zone in the welding process is small, and the shielding layer, armor layer and ground wire are melted instantly in a very short time by using high power energy, which reduces welding deformation and residual stress, and ensures that the welding is firm. At the same time, due to the fast heating speed and rapid cooling, the weld structure is refined, the welding quality is high, and the phenomenon of low efficiency and poor quality of manual welding ground wire is effectively reduced. During the welding process of the current welding machine, the contact surface resistance of the metal is large. When a large instantaneous current passes through, local high temperature will be generated to melt the metal and complete the welding. When the metal surface rusts, its contact resistance increases, which is more conducive to generating local high temperature and completing the welding. Therefore, the metal rust caused by surface oxidation will not only not produce a cold weld, but make the current welding more firm. The current welding machine has a stepped groove inside, which can adapt to the stepped shape of the cable stripping, so that the welding point can quickly and accurately contact the welding point after the cable is placed inside the current welding machine, saving adjustment time and improving work efficiency. One end of the cable is stripped into a stepped shape and placed in the stepped groove of the current welding machine. Local heating is performed by the current welding machine, which can accurately heat and weld the connection position, reduce deformation and welding stress, and the welding position is heated and cooled quickly. The ultrasonic detector is connected to the cable to observe and detect the quality of the welding position, which can help grasp the welding quality of non-destructive welding, help reduce the defective rate, and improve the welding quality. The high welding quality can timely rust the metal surface of the cable head and increase the contact surface resistance, which is more conducive to generating local high temperature, completing the welding and avoiding false welding.

[0094] An embodiment of the present invention provides a computer-readable storage medium, which includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute the cable shielding layer welding method in the low-heating manner.

[0095] Specifically, the low-heat-generating cable shielding layer welding method includes:

[0096] Step S101, peeling off the protective layer of one end of the cable to form a stepped cable head, wherein the cable comprises a protective layer, an armor layer, and a shielding layer;

[0097] Step S102, placing the cable head at the internal stepped groove position of the current welding machine, and clamping the cable head with the welding clamp, and controlling the ground wire to contact with the armor layer and the shielding layer of the cable head;

[0098] Step S103, starting the welding switch of the current welding machine, using the probe of the current welding machine to weld the ground wire and the armor layer, and welding the ground wire and the shielding layer.

[0099] An embodiment of the present invention provides a processor, and the processor is used to run a program, wherein the cable shielding layer welding method in a low-heating manner is executed when the program is run.

[0100] Specifically, the low-heat-generating cable shielding layer welding method includes:

[0101] Step S101, peeling off the protective layer of one end of the cable to form a stepped cable head, wherein the cable comprises a protective layer, an armor layer, and a shielding layer;

[0102] Step S102, placing the cable head at the internal stepped groove position of the current welding machine, and clamping the cable head with the welding clamp, and controlling the ground wire to contact with the armor layer and the shielding layer of the cable head;

[0103] Step S103, starting the welding switch of the current welding machine, using the probe of the current welding machine to weld the ground wire and the armor layer, and welding the ground wire and the shielding layer.

[0104] An embodiment of the present invention provides an electronic device, the device comprising a processor, a memory, and a program stored in the memory and executable on the processor, and when the processor executes the program, at least the following steps are implemented:

[0105] Step S101, peeling off the protective layer of one end of the cable to form a stepped cable head, wherein the cable comprises a protective layer, an armor layer, and a shielding layer;

[0106] Step S102, placing the cable head at the internal stepped groove position of the current welding machine, and clamping the cable head with the welding clamp, and controlling the ground wire to contact with the armor layer and the shielding layer of the cable head;

[0107] Step S103, starting the welding switch of the current welding machine, using the probe of the current welding machine to weld the ground wire and the armor layer, and welding the ground wire and the shielding layer.

[0108] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0109] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program for initializing at least the following method steps:

[0110] Step S101, peeling off the protective layer of one end of the cable to form a stepped cable head, wherein the cable comprises a protective layer, an armor layer, and a shielding layer;

[0111] Step S102, placing the cable head at the internal stepped groove position of the current welding machine, and clamping the cable head with the welding clamp, and controlling the ground wire to contact with the armor layer and the shielding layer of the cable head;

[0112] Step S103, starting the welding switch of the current welding machine, using the probe of the current welding machine to weld the ground wire and the armor layer, and welding the ground wire and the shielding layer.

[0113] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0114] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0115] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0116] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0117] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0118] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0119] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0120] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0121] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0122] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0123] The present invention discloses a low-heating cable shielding layer welding method, wherein the protective layer of one end of the cable is stripped to form a stepped cable head, wherein the cable includes a protective layer, an armor layer, and a shielding layer; the cable head is placed at the internal stepped groove position of the current welding machine, and the cable head is clamped with the welding position, and the ground wire is controlled to contact the armor layer and the shielding layer of the cable head; the welding switch of the current welding machine is started, and the probe of the current welding machine is used to weld the ground wire and the armor layer, and the ground wire and the shielding layer are welded. By stripping one end of the cable into a stepped shape and placing it in the stepped groove of the current welding machine, the current welding machine is used for local heating, and the connection position can be accurately heated and welded, which can reduce deformation and welding stress. The welding position is heated and cooled quickly, and the welding quality is high. Even if the metal surface of the cable head is rusted, the contact surface resistance increases, which is more conducive to generating local high temperature, completing welding, and avoiding cold welding. Therefore, the metal corrosion caused by surface oxidation will not only not produce cold welding, but also make the current welding more firm. The problem of low efficiency of the traditional secondary control cable shielding layer welding method is solved.

[0124] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low-heat-generating cable shielding layer welding method, characterized in that: include: The protective layer of one end of the cable is peeled off to form a stepped cable head, wherein the cable comprises a protective layer, an armor layer, and a shielding layer; The cable head is placed at the internal step groove position of the current welding machine, and the cable head is clamped with the welding clamping position, and the ground wire is controlled to contact with the armor layer and the shielding layer of the cable head; The welding switch of the current welding machine is started, and the probe of the current welding machine is used to weld the ground wire and the armor layer, and the ground wire and the shielding layer are welded.

2. The method according to claim 1, characterized in that After welding the ground wire and the armor layer using the probe of the current welding machine, and welding the ground wire and the shielding layer, the method further includes: Performing signal welding detection on the welding position by ultrasonic detection to obtain pulse signal detection data, wherein the pulse signal detection data includes pulse signal receiving time, pulse signal width, pulse signal frequency and pulse signal amplitude; A weld quality at the weld location is determined based at least on the pulse signal inspection data.

3. The method according to claim 2, characterized in that Determining the welding quality of the welding position at least based on the pulse signal inspection data includes: Determine a welding surface quality observation value according to the welding position, wherein the welding surface quality observation value includes 1, 50, and 100; Using the first formula: Determine the welding quality score of the welding position, and determine the welding quality of the welding position according to the welding quality score, wherein S is the welding quality score, w1 is the welding surface quality observation value, f is the pulse signal frequency, t is the pulse signal receiving time, A is the pulse signal amplitude, and β1, β2, and β3 are weight coefficients.

4. The method according to claim 1, characterized in that The ground wire and the armor layer are welded using a probe of the current welding machine, including: Obtaining a given pulse voltage for welding by the current welding machine, and determining a control voltage for welding by the current welding machine by adopting a given signal transformation method according to the given pulse voltage; A pulse current is determined according to the control voltage, and a probe of the current welding machine is used to weld the ground wire and the armor layer according to the pulse current.

5. The method according to claim 4, characterized in that Obtaining a given pulse voltage for welding by the current welding machine, comprising: The control pulse generator generates a rectangular pulse with a preset duty cycle, and separates the rectangular pulse into a control pulse with a pulse time and a base value time; Using the control pulse of the pulse time and the base value time as a switch signal to control the pulse given time and the base value given time corresponding to the given pulse voltage; A pulse amplitude given value and a pulse base value given value are obtained, and the given pulse voltage is generated according to the pulse given time, the base value given time, the pulse amplitude given value and the base value given value.

6. The method according to claim 2, characterized in that The signal welding detection is performed on the welding position by ultrasonic detection, and the pulse signal amplitude in the pulse signal detection data is obtained, including: According to the second formula: Determine the pulse signal amplitude A, where A 发射 is the amplitude of the transmitted pulse signal, A 接收 is the amplitude of the received pulse signal.

7. The method according to claim 2, characterized in that The signal welding detection is performed on the welding position by ultrasonic detection, and the pulse signal frequency in the pulse signal detection data is obtained, including: According to the third formula: Determine the pulse signal frequency f, where f 发射 is the frequency of the transmitted pulse signal, f 接收 is the frequency of the received pulse signal.

8. The method according to claim 3, characterized in that Determining the welding quality of the welding position according to the welding quality score includes: Determining whether the welding quality score is greater than a preset quality score; When the welding quality score is less than or equal to the preset quality score, an alarm signal is generated, wherein the alarm signal is used to remind that the welding quality of the welding position is unqualified.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the cable shielding layer welding method in a low-heat-generating manner as described in any one of claims 1 to 8.

10. An electronic device, characterized in that: include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and are configured to be executed by the one or more processors, and the one or more programs include a method for performing a low-heat-generating cable shield welding method as described in any one of claims 1 to 8.

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