Spot welding device for smartwatch manufacturing

Abstract

The invention belongs to the technical field of spot welding, and particularly relates to a spot welding device for smartwatch manufacturing, which comprises a welding table, one end of the welding table is rotatably connected with a rotating beam, the front end face of the rotating beam is slidably connected with a cross beam, the cross beam is connected with the rotating beam through a screw rod, and the top end of the rotating beam is fixedly connected with a motor. An output shaft of the motor is connected with the end of the screw, an electric welding machine is slidably connected to the cross beam, a button used for controlling the motor is installed on a handle on the side of the electric welding machine, and a clamping assembly is arranged in a groove in the welding table. According to the electric welding machine, the electric welding machine is arranged on the slidable cross beam, the cross beam is connected with the rotating beam through the screw rod, and the motor is matched for driving, so that an operator can easily control the electric welding machine to move up and down, advance, retreat and rotate only through a button on a handle, the weight of the electric welding machine and the cross beam does not need to be manually borne, and the operation intensity is remarkably reduced; and the convenience and the working efficiency of welding operation are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spot welding, in particular to a spot welding device for smart watch manufacturing. BACKGROUND

[0002] The spot welding machine adopts the principle of double-sided double-point overcurrent welding. When working, two electrodes press the workpiece to form a certain contact resistance under the pressure of the two electrodes. When the welding current flows from one electrode to the other electrode, it forms a momentary hot fusion joint at the two contact resistance points. The welding current forms a loop from the other electrode to the electrode along the two workpieces, and does not damage the internal structure of the welded workpiece.

[0003] In the field of smart watch manufacturing, the chip welding process is a key link, and its welding quality directly affects the performance and stability of the smart watch. The electric welding machine of the traditional spot welding device is installed on the rocker arm. In the actual operation process, the operator needs to manually adjust the position of the welding needle. This process needs to bear the weight of the electric welding machine and the rocker arm, which is easy to cause hand fatigue and affect work efficiency and welding precision. Therefore, corresponding improvements are made for this problem. SUMMARY

[0004] Based on the technical problems existing in the prior art, the present application provides a spot welding device for smart watch manufacturing.

[0005] The spot welding device for smart watch manufacturing provided by the present application comprises a welding table, one end of the welding table is rotationally connected with a rotating beam, the front end face of the rotating beam is slidingly connected with a cross beam, the cross beam is connected with the rotating beam through a screw rod, the top end of the rotating beam is fixedly connected with a motor, the output shaft of the motor is connected with the end part of the screw rod, an electric welding machine is slidingly connected on the cross beam, a button for controlling the motor is installed on the handle beside the electric welding machine, and a clamping assembly is arranged in the groove on the welding table; the chip is installed on the clamping assembly, then the handle is held by hand to exert force, the electric welding machine is pulled to move forward and backward along the cross beam, the electric welding machine and the rotating beam are rotated together, the up key on the button is pressed by the thumb to drive the screw rod to rotate through the motor to drive the cross beam and the electric welding machine to move upward, the down key on the button is pressed by the thumb to drive the screw rod to rotate through the motor to drive the cross beam and the electric welding machine to move downward, and the operation is stopped when the handle is released. This can conveniently move the welding needle of the electric welding machine to the welding position on the chip, then perform spot welding and leave after the welding is completed, and the weight of the electric welding machine and the cross beam does not need to be borne by hand during the operation process.

[0006] Preferably, the clamping assembly comprises a carrier plate in the groove and elastically connected with the welding table, the top of the carrier plate is provided with a pair of positioning plates, the top of the carrier plate is also fixedly connected with a pair of guide columns, the two ends of the guide columns respectively pass through the two positioning plates, the opposite sides of the two positioning plates are respectively fixedly connected with arc-shaped elastic positioning sheets, and the positioning plates and the carrier plate are connected through a transmission assembly; the chip is placed between the two positioning sheets, and the chip is preliminarily stabilized through the extrusion force generated by the two positioning sheets; when the welding needle moves to contact the chip, the button is released, even if there is an error in the reaction time, the chip on the carrier plate will also move downward together with the welding needle, so that excessive extrusion of the chip by the welding needle is avoided, and when the carrier plate moves downward, the two positioning plates are pushed towards the middle through the transmission assembly, so that the arc-shaped positioning sheets are deformed to increase the fixing force on the chip, and the contact area between the positioning sheets and the chip is also increased in the deformation process, so that the chip is stably fixed.

[0007] Preferably, the bottom wall of the groove is fixedly connected with a pair of springs, and the other ends of the springs are fixedly connected with the carrier plate; after the electric welding machine leaves the chip, the carrier plate can be reset to the initial position through the elastic force of the springs.

[0008] Preferably, the transmission assembly comprises a pair of shaft columns connected in the groove through shaft seats, the two ends of the shaft columns are respectively fixedly sleeved with gear cylinders, the bottom of the carrier plate is fixedly connected with a plurality of gear racks one engaged with corresponding gear cylinders, the two sides of the welding table are respectively penetrated by a pair of gear racks two engaged with the gear cylinders, and the top ends of the gear racks two are slidably connected with adjacent positioning plates through slide rails; when the carrier plate moves downward, the gear racks one are driven to move, the gear racks one are engaged with the gear cylinders to drive the gear racks two to move, and the two groups of gear racks two can push the two positioning plates towards the middle.

[0009] Preferably, the spot welding device for manufacturing the smart watch further comprises a temperature acquisition module installed near the welding needle of the electric welding machine, used for monitoring the welding point temperature in real time and generating a temperature change coefficient through the control module; a current acquisition module installed on the power supply circuit of the electric welding machine, used for monitoring the welding current stability in real time and generating a current fluctuation coefficient through the control module; a pressure acquisition module installed on the electric welding machine and contacting the cross beam, used for monitoring the contact pressure between the welding needle and the chip in real time; the control module comprehensively analyzes the generated temperature change coefficient and current fluctuation coefficient to generate an evaluation coefficient, judges whether the current welding quality meets the normal welding, compares the evaluation coefficient with a pre-set reference threshold value, and controls the working states of the electric welding machine and the motor according to the comparison result.

[0010] Preferably, the output end and the input end of the temperature acquisition module, the output end and the input end of the current acquisition module, and the output end and the input end of the pressure acquisition module are respectively electrically connected with the input end and the output end of the control module, and the output end of the control module is respectively electrically connected with the input end of the electric welding machine and the input end of the motor.

[0011] Preferably, the control module controls the execution steps of the working state of the electric welder and the motor according to the comparison result as follows:

[0012] Real-time detection: the temperature acquisition module collects the welding point temperature; the current acquisition module collects the welding current;

[0013] Coefficient calculation: the control module calculates the temperature change coefficient, the current fluctuation coefficient and the evaluation coefficient;

[0014] Dynamic adjustment: if W λ 阈 : maintain the current parameters; if W λ ≥ W 阈 : reduce the current and shorten the welding time, W 阈 is the reference threshold value.

[0015] Preferably, the generation logic of the temperature change coefficient is:

[0016] S1, obtaining the actual temperature of the welding point at different time within T time of the electric welder during welding by the temperature acquisition module, and marking the actual temperature obtained at the p-th moment within T time as p is a positive integer;

[0017] S2, calculating the temperature change coefficient, and the expression of the calculation is:

[0018]

[0019] In the formula, q is the sampling number within T time.

[0020] Preferably, the generation logic of the current fluctuation coefficient is:

[0021] S1, obtaining the actual welding current of the electric welder at different time within T time during welding by the current acquisition module, and marking the actual current obtained at the r-th moment within T time as r is a positive integer;

[0022] S2, calculating the current fluctuation coefficient, and the expression of the calculation is:

[0023]

[0024] In the formula, is the average current within T time; s is the sampling number within T time.

[0025] Preferably, the control module is used for formula analysis, and the formula is:

[0026] ​

[0027] In the formula, w1, w2 are weight coefficients, w1, w2>1.

[0028] Compared with the prior art, the application provides a spot welding device for smart watch manufacturing, which has the following beneficial effects:

[0029] 1. A spot welding device for smart watch manufacturing, the device is characterized in that an electric welding machine is arranged on a slidable cross beam, the cross beam is connected with a rotating beam through a screw rod, and is driven by a motor, so that an operator can easily control the up-down movement, forward-backward movement and rotation of the electric welding machine through a button on a handle, without manually bearing the weight of the electric welding machine and the cross beam, thereby significantly reducing the operation strength and greatly improving the convenience and work efficiency of welding operation.

[0030] 2. A spot welding device for smart watch manufacturing, the device is characterized in that a clamping assembly is arranged, the clamping assembly is elastically connected with a welding table, and a positioning plate, a positioning sheet and a transmission assembly are combined, so that even if there is an operation reaction time error in the welding process, the chip can be moved together with the welding needle to avoid excessive extrusion. Meanwhile, when the carrier plate moves downward, the transmission assembly pushes the positioning plate to deform the positioning sheet, thereby increasing the fixing force and contact area of the chip, effectively protecting the chip and improving the welding success rate.

[0031] 3. A spot welding device for smart watch manufacturing, the device is characterized in that a temperature acquisition module, a current acquisition module and a pressure acquisition module are arranged, so that the welding spot temperature, the welding current stability and the contact pressure between the welding needle and the chip can be monitored in real time. The control module calculates and comprehensively analyzes the temperature variation coefficient and the current fluctuation coefficient, generates an evaluation coefficient, and compares the evaluation coefficient with a reference threshold value, so as to realize dynamic adjustment of the working state of the electric welding machine and the motor. The intelligent control mechanism can ensure that all parameters in the welding process are always in the optimal state, effectively improves the consistency and stability of the welding quality, meets the high-precision manufacturing requirements of the smart watch, and reduces the product failure rate. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a first angle structure schematic diagram of a spot welding device for smart watch manufacturing according to the application;

[0033] Figure 2 FIG. 2 is a second angle structure schematic diagram of a spot welding device for smart watch manufacturing according to the application;

[0034] Figure 3 FIG. 3 is an enlarged structure schematic diagram of A of the application; Figure 2

[0035] Figure 4 FIG. 4 is an electric welding machine structure schematic diagram of a spot welding device for smart watch manufacturing according to the application;

[0036] ​Figure 5 A system block diagram of a spot welding device for manufacturing smart watches is provided.

[0037] In the figure: 1, welding table; 2, rotating beam; 3, cross beam; 4, electric welder; 5, screw rod; 6, motor; 7, handle; 8, button; 9, carrier plate; 10, positioning plate; 11, positioning sheet; 12, guide column; 13, rack one; 14, shaft column; 15, rack two; 16, slide rail; 17, gear cylinder; 18, spring; 19, temperature acquisition module; 20, current acquisition module; 21, pressure acquisition module; 22, control bin. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all.

[0039] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0040] Reference Figures 1-5 A spot welding device for manufacturing smart watches, comprising a welding table 1, one end of the welding table 1 being rotatably connected with a rotating beam 2, the front end face of the rotating beam 2 being slidably connected with a cross beam 3, and the cross beam 3 being connected with the rotating beam 2 through a screw rod 5, the top end of the rotating beam 2 being fixedly connected with a motor 6, the output shaft of the motor 6 being connected with the end of the screw rod 5, an electric welder 4 being slidably connected on the cross beam 3, a handle 7 on the side of the electric welder 4 being provided with a button 8 for controlling the motor 6, and a clamping assembly being arranged in the groove on the welding table 1;

[0041] In use, the chip is installed on the clamping assembly, then the handle 7 is held by hand to exert force, the electric welder 4 is pulled to move forward and backward along the cross beam 3, the electric welder 4 is pulled to rotate together with the rotating beam 2, the up key on the button 8 is pressed by the thumb to drive the cross beam 3 and the electric welder 4 to move upward through the rotation of the screw rod 5 driven by the motor 6, the down key on the button 8 is pressed by the thumb to drive the cross beam 3 and the electric welder 4 to move downward through the rotation of the screw rod 5 driven by the motor 6, and the movement stops when the handle 7 is released, so that the welding needle of the electric welder 4 can be conveniently moved to the welding position on the chip, then spot welding is performed and the electric welder 4 leaves after the welding is completed, and the weight of the electric welder 4 and the cross beam 3 does not need to be borne by hand during the operation process.

[0042] In another embodiment, considering that in the prior art and the foregoing scheme of the application, the stopping position of the welding needle is determined manually, there are time and operation errors, and the welding needle is easy to crush the chip, the application is specifically through naked eye judgment and manual control button 8 to pause the downward movement of the electric welding machine 4, so in the scheme, the clamping assembly includes a carrier plate 9 located in the groove and elastically connected with the welding table 1, the top of the carrier plate 9 is provided with a pair of positioning plates 10, and the top of the carrier plate 9 is also fixedly connected with a pair of guide columns 12, the two ends of the guide column 12 respectively penetrate through the two positioning plates 10, and the opposite surfaces of the two positioning plates 10 are respectively fixedly connected with arc-shaped elastic positioning sheets 11.

[0043] In use, the chip is placed between the two positioning sheets 11, and the chip is preliminarily stabilized through the extrusion force generated by the two positioning sheets 11, and when the welding needle moves to contact the chip, the button 8 is released, so that the chip on the carrier plate 9 moves downward together with the welding needle, so that the welding needle does not cause excessive extrusion to the chip, and when the carrier plate 9 moves downward, the two positioning plates 10 are pushed to the middle through the transmission assembly, so that the arc-shaped positioning sheet 11 is deformed to increase the fixing force on the chip, and the contact area between the positioning sheet 11 and the chip is also increased during the deformation process, so that the chip is stably fixed.

[0044] The bottom wall of the groove is fixedly connected with a pair of springs 18, and the other end of the spring 18 is fixedly connected with the carrier plate 9.

[0045] In use, when the electric welding machine 4 leaves the chip, the carrier plate 9 can be reset to the initial position through the elastic force of the spring 18.

[0046] The transmission assembly includes a pair of shaft columns 14 connected in the groove through shaft seats, the two ends of the shaft column 14 are respectively fixedly sleeved with gear cylinders 17, the bottom of the carrier plate 9 is fixedly connected with a plurality of gear racks one 13 respectively engaged with the corresponding gear cylinders 17, and the two sides of the welding table 1 are respectively penetrated through a pair of gear racks two 15 engaged with the gear cylinders 17, and the top end of the gear rack two 15 is slidably connected with the adjacent positioning plate 10 through a sliding rail 16.

[0047] In use, when the carrier plate 9 moves downward, the gear rack one 13 is driven to move, the gear rack one 13 is engaged with the gear cylinder 17 to drive the gear rack two 15 to move, and the two groups of gear racks two 15 can push the two positioning plates 10 to the middle.

[0048] In another embodiment, a spot welding device for manufacturing a smart watch further comprises:

[0049] A temperature acquisition module 19 is installed near the welding needle of the electric welding machine 4, for monitoring the welding point temperature in real time, and generating a temperature change coefficient through the control module.

[0050] The current acquisition module 20 is installed on the power supply circuit of the electric welding machine 4, and is used for monitoring the welding current stability in real time and generating a current fluctuation coefficient through the control module;

[0051] The pressure acquisition module 21 is installed on the electric welding machine 4 at a position in contact with the cross beam 3, and is used for monitoring the contact pressure between the welding needle and the chip in real time.

[0052] It should be noted that the temperature acquisition module 19 can be a micro thermocouple (K type) or other equipment capable of monitoring the welding point temperature in real time, the current acquisition module 20 can be a Hall effect current sensor or other equipment capable of monitoring the welding current in real time, the pressure acquisition module 21 can be a micro piezoresistive sensor or other equipment capable of monitoring the contact pressure between the welding needle and the chip in real time, and the control module is an embedded controller (such as an STM32 series) integrated with a data fusion algorithm, so the temperature acquisition module 19, the current acquisition module 20, the pressure acquisition module 21 and the control module are not specifically limited here and can be selected according to actual needs.

[0053] In use, the control module comprehensively analyzes the generated temperature change coefficient and current fluctuation coefficient to generate an evaluation coefficient, judges whether the current welding quality meets normal welding, compares the evaluation coefficient with a pre-set reference threshold value, and controls the working states of the electric welding machine 4 and the motor 6 according to the comparison result. When the welding needle contacts the chip, the pressure acquisition module 21 will acquire a pressure signal, at which time the control module can start the electric welding machine 4. If the electric welding machine 4 leaves the chip after welding, the pressure signal disappears, and the electric welding machine 4 is automatically turned off.

[0054] The output end and the input end of the temperature acquisition module 19, the output end and the input end of the current acquisition module 20, and the output end and the input end of the pressure acquisition module 21 are electrically connected with the input end and the output end of the control module, respectively, and the output end of the control module is electrically connected with the input end of the electric welding machine 4 and the input end of the motor 6, respectively.

[0055] In another embodiment, the control module comprehensively analyzes the generated temperature change coefficient and current fluctuation coefficient to generate an evaluation coefficient, judges whether the current welding quality meets normal welding, compares the evaluation coefficient with a pre-set reference threshold value, and controls the working states of the electric welding machine 4 and the motor 6 according to the comparison result. The specific execution steps are as follows:

[0056] Real-time detection: the temperature acquisition module 19 acquires the welding point temperature; the current acquisition module 20 acquires the welding current;

[0057] Coefficient calculation:

[0058] Temperature change coefficient: quantifies the welding heat accumulation efficiency, characterizes the trend of the change of the welding spot temperature over time, and reflects the accumulation rate of heat in the welding process; TΔ≈1: insufficient temperature rise → insufficient heat input → insufficient welding spot penetration → risk of false welding; TΔ>>1: too fast temperature rise → heat concentration → overheat of the chip substrate → risk of burn-through;

[0059] The generation logic of the temperature change coefficient is as follows:

[0060] S1, acquiring the actual temperature of the welding spot at different time points within T time when the electric welder 4 is welding through the temperature acquisition module 19, and marking the actual temperature acquired at the pth time point within T time as p is a positive integer;

[0061] S2, calculating the temperature change coefficient, and the expression for the calculation is as follows:

[0062]

[0063] In the formula, q is the number of sampling times within T time.

[0064] Current fluctuation coefficient: quantifies the welding loop stability, characterizes the discrete degree of the welding current, and reflects the resistance change of the electrode-chip contact interface; Iσ≈1: stable current → constant contact resistance → stable welding quality; Iσ>>1: current oscillation → sudden change of contact resistance → poor contact / short circuit risk;

[0065] The generation logic of the current fluctuation coefficient is as follows:

[0066] S1, acquiring the actual welding current at different time points within T time when the electric welder 4 is welding through the current acquisition module 20, and marking the actual current acquired at the rth time point within T time as r is a positive integer;

[0067] S2, calculating the current fluctuation coefficient, and the expression for the calculation is as follows:

[0068]

[0069] In the formula, is the average current within T time; s is the number of sampling times within T time.

[0070] Evaluation coefficient: quantifies the thermal-electric coupling effect, comprehensively quantifies the antagonistic relationship between temperature accumulation and current stability, and generates a comprehensive rating of the welding quality; formulaic analysis is performed through the control module according to the formula:

[0071]

[0072] In the formula, w1 and w2 are weight coefficients, and w1 and w2>1.

[0073] Dynamic adjustment: if W λ <W 阈 : maintain the current parameters; if W λ ≥ W 阈 : reduce the current, drive the screw 5 to rotate by the motor 6 to drive the welding machine 4 away from the welding point to shorten the welding time, W 阈 is a reference threshold.

[0074] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art within the technical range disclosed by the present application, according to the technical scheme and the inventive concept of the present application, equivalent replacement or change, should be covered within the protection scope of the present application.

Claims

1. A spot welding device for smart watch manufacturing, comprising a welding table (1), characterized in that, One end of the welding table (1) is rotatably connected with a rotating beam (2), the front end surface of the rotating beam (2) is slidably connected with a cross beam (3), and the cross beam (3) is connected with the rotating beam (2) through a screw rod (5), the top end of the rotating beam (2) is fixedly connected with a motor (6), the output shaft of the motor (6) is connected with the end of the screw rod (5), the cross beam (3) is slidably connected with a welding machine (4), a button (8) for controlling the motor (6) is installed on the handle (7) beside the welding machine (4), and a clamping assembly is arranged in the groove on the welding table (1).

2. The spot welding device for manufacturing of smart watch according to claim 1, wherein, The clamping assembly comprises a carrier plate (9) arranged in the groove and elastically connected with the welding table (1), a pair of positioning plates (10) arranged on the top of the carrier plate (9), and a pair of guide columns (12) fixedly connected with the top of the carrier plate (9), the two ends of the guide column (12) respectively penetrating through the two positioning plates (10), and the opposite surfaces of the two positioning plates (10) are respectively fixedly connected with arc-shaped elastic positioning sheets (11).

3. The spot welding device for manufacturing of smart watch according to claim 2, wherein, The bottom wall of the groove is fixedly connected with a pair of springs (18), and the other end of the spring (18) is fixedly connected with the carrier plate (9).

4. The spot welding device for manufacturing of smart watch according to claim 2, wherein, The transmission assembly comprises a pair of shaft columns (14) connected in the groove through shaft seats, the two ends of the shaft column (14) are respectively fixedly sleeved with gear cylinders (17), the bottom of the carrier plate (9) is fixedly connected with a plurality of gear racks (13) respectively engaged with the corresponding gear cylinders (17), and a pair of gear racks (15) engaged with the gear cylinders (17) are respectively arranged on the two sides of the welding table (1), and the top end of the gear rack (15) is slidably connected with the adjacent positioning plate (10) through a sliding rail (16).

5. The spot welding device for manufacturing of smart watch according to claim 1, wherein, It also comprises: A temperature acquisition module (19) is arranged near the welding needle of the welding machine (4) to monitor the welding point temperature in real time, and a temperature change coefficient is generated through the control module; A current acquisition module (20) is arranged on the power supply circuit of the welding machine (4) to monitor the welding current stability in real time, and a current fluctuation coefficient is generated through the control module; A pressure acquisition module (21) is arranged on the welding machine (4) at the position in contact with the cross beam (3) to monitor the contact pressure between the welding needle and the chip in real time; The temperature change coefficient and the current fluctuation coefficient generated by the control module in the control bin (22) behind the rotating beam (2) are comprehensively analyzed to generate an evaluation coefficient, the evaluation coefficient is compared with a pre-set reference threshold value, and the working state of the welding machine (4) and the motor (6) is controlled according to the comparison result.

6. The spot welding device for manufacturing of smart watches according to claim 5, characterized in that, The output end and the input end of the temperature acquisition module (19), the output end and the input end of the current acquisition module (20), and the output end and the input end of the pressure acquisition module (21) are electrically connected with the input end and the output end of the control module, and the output end of the control module is electrically connected with the input end of the welding machine (4) and the input end of the motor (6).

7. The spot welding device for manufacturing of smart watch according to claim 5, wherein, The control module controls the execution steps of the working state of the electric welder (4) and the motor (6) according to the comparison result as follows: the temperature acquisition module (19) acquires the welding point temperature; the current acquisition module (20) acquires the welding current; the control module calculates the temperature change coefficient, the current fluctuation coefficient and the evaluation coefficient; when the evaluation coefficient is less than the reference threshold, the current working parameters are maintained; when the evaluation coefficient is greater than or equal to the reference threshold, the welding current is reduced and the welding time is shortened. 8.The spot welding device for manufacturing smart watch according to claim 5, wherein, The generation logic of the temperature change coefficient is: obtaining the measured welding point temperature of the electric welder (4) at each sampling time in the welding period T, taking the temperature at the first time as the reference value; based on the relative deviation amount of the temperature at each time relative to the reference temperature, exponential accumulation calculation is carried out to generate the temperature change coefficient representing the heat accumulation rate. 9.The spot welding device for manufacturing smart watch according to claim 5, wherein, The generation logic of the current fluctuation coefficient is: obtaining the measured welding current of the electric welder (4) at each sampling time in the welding period T; based on the standard deviation of the current at each time relative to the average current, exponential amplification calculation is carried out to generate the current fluctuation coefficient representing the current stability.

10. The spot welding device for manufacturing of smart watch according to claim 5, wherein, The control module dynamically weighs and calculates by coupling the temperature change coefficient and the current fluctuation coefficient, and combining the weight coefficient to generate the evaluation coefficient quantifying the heat-electricity coupling effect.

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