Automatic wire feeder for inverter production

Abstract

The invention relates to the technical field of production equipment, discloses an automatic wire feeder for inverter production, and mainly solves the technical problems that tin permeation and tin feeding cannot be quantitatively controlled, the welding precision is insufficient, standardized operation is difficult to form and the like, quantitative tin feeding is realized by utilizing the automatic wire feeder, the condition of quality problem caused by tin permeation is avoided, and the production efficiency is improved. A standardized operation process is formed, and the operation efficiency of personnel is improved.

Description

Technical Field

[0001] The invention relates to the technical field of production equipment, and in particular to an automatic wire feeder for inverter production. Background Art

[0002] With the explosion of domestic photovoltaic installations, more and more domestic manufacturers have begun to invest on a large scale in the research and development and production of photovoltaic inverters.

[0003] In the production process of inverters, the existing welding method is mainly manual welding. The welder holds the electric soldering iron and aligns it with the solder point on the board, and then uses the other hand to hold the solder wire to fill the solder. In the actual application process, the researchers found that the above method has great limitations in control accuracy:

[0004] It is difficult to control the time and amount of hand-held tin feeding, and it is difficult to form a standardized process and ensure stable tin feeding;

[0005] In scenarios where the board has been embedded in the cabinet, the welder may not be able to see the tin penetration status on the back side of the solder joint, which may easily lead to excessive tin penetration on the back side of the circuit board, and then cause short circuit problems caused by sticking points;

[0006] The solder wire is too long and easily bends during handheld soldering, making it impossible to accurately align the soldering point. Summary of the invention

[0007] In view of the shortcomings and defects of the prior art, the present invention provides an automatic wire feeder for inverter production, which solves technical problems such as tin seepage, inability to quantitatively control tin feeding, insufficient welding accuracy, and difficulty in forming standardized operations that are prone to occur when welding large cabinets / large circuit boards at the production site.

[0008] The purpose of the present invention can be achieved through the following technical solutions.

[0009] An automatic wire feeder for inverter production, comprising a spur gear mechanism, a single-button start-stop circuit, and a tin outlet tube;

[0010] The single button start-stop circuit includes a stepping motor, a time relay, a tin-discharging control button, a first intermediate relay, a second intermediate relay, and a 24V power supply;

[0011] The stepper motor is connected to the spur gear mechanism; the stepper motor is respectively connected to one end of the time relay coil, one end of the first intermediate relay coil, one end of the second intermediate relay coil, one end of the second intermediate relay normally closed contact, one end of the second intermediate relay normally open contact, and grounded; one end of the second intermediate relay normally closed contact is connected to one end of the first intermediate relay first normally open contact; the other end of the time relay coil is respectively connected to one end of the tin-discharging control button switch, one end of the second normally open contact of the first intermediate relay, one end of the time relay delayed closing instantaneous disconnection normally open contact, and one end of the time relay delayed disconnection instantaneous closing normally closed contact; the other end of the first intermediate relay coil is connected to the other end of the time relay delayed disconnection instantaneous closing normally closed contact; the other end of the second intermediate relay coil is connected to the other end of the time relay delayed closing instantaneous disconnection normally open contact; the 24V power supply is respectively connected to the other end of the second intermediate relay normally closed contact, the other end of the tin-discharging control button switch, the other end of the first normally open contact of the first intermediate relay, and the other end of the second normally open contact of the first intermediate relay;

[0012] The tin outlet is equipped with a metal tube for heat insulation and foolproofing;

[0013] The opening and closing of the normally open contact of the second intermediate relay is used to control the start and stop of the stepper motor; the stepper motor is used to control the transmission of the spur gear mechanism to bite through the surface of the solder wire and transport the solder wire to the tin outlet tube.

[0014] Preferably, when the button is pressed, the wire feeder will be triggered to discharge tin at a fixed speed within a preset cycle, and long pressing or pressing the button again within the tin discharge cycle will not trigger the above-mentioned tin discharge process again.

[0015] The beneficial technical effects of the present invention are as follows: it mainly solves technical problems such as tin infiltration and tin feeding cannot be quantitatively controlled, insufficient welding accuracy, and difficulty in forming standardized operations. Quantitative tin feeding is achieved by using an automatic wire feeder, which avoids the occurrence of quality problems caused by tin infiltration, forms a standardized operation process, and improves the work efficiency of personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram (front perspective view) of the present invention.

[0017] Figure 2 It is a structural diagram (side perspective view) of the present invention.

[0018] Figure 3 It is the electrical control diagram of the present invention.

[0019] Figure numerals: 1 is the tin wire coil; 2 is the power switch; 3 is the tin feeding rate adjustment knob; 4 is the spur gear mechanism; 5 is the tin outlet tube; 6 is the tin outlet; 7 is the 24V power supply; SBE is the tin outlet control button; KT is the time relay; KM1 is the first intermediate relay; KM2 is the second intermediate relay; M is the stepping motor. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0021] Example: Figure 1 , 2 As shown in Figure 3, an automatic wire feeder for inverter production includes a tin wire coil 1, a power switch 2, a tin feeding rate adjustment knob 3 (to control the tin feeding speed), a spur gear mechanism 4 (the core mechanism for tin feeding, which realizes tin feeding and piercing the tin wire through gear meshing transmission. The tin wire itself is tubular and contains rosin. Piercing it facilitates exhaust and improves welding effect), a tin outlet tube 5 (considering the different sizes of products and the different distances between the wire feeder and the soldering point, a tin outlet tube is provided for easy control), a tin outlet 6, and a single-button start and stop circuit.

[0022] The single-button start-stop circuit includes a 24V power supply 7 (power adapter), a tin-discharging control button SBE (implemented through circuit interlocking, when the button is pressed, it will trigger the wire feeder to discharge tin at a fixed speed within a preset cycle, and long pressing or pressing the button again during the tin-discharging cycle will not trigger the above-mentioned tin-discharging process again, and the tin-discharging cycle is adjustable), a time relay KT (controlling the tin-discharging time by controlling the running time of the stepper motor M, with an adjustment range of 0 to 100ms), a first intermediate relay KM1 (delayed start, interlocking control when the button is pressed by mistake or for a long time), a second intermediate relay KM2 (delayed disconnection, controlling the stepper motor M to stop), and a stepper motor M (controlling the spur gear mechanism to transmit and deliver the tin wire during operation).

[0023] The motor operation cycle control is achieved through a single button start and stop circuit.

[0024] The tin discharging speed is 0~10mm / ms.

[0025] The specific steps of using the automatic wire feeder are: prepare the tin wire - trigger the button - automatically feed 10mm tin wire - aim the soldering iron tip at the pad to preheat - hot melt and consume the tin wire - prepare for the next welding.

[0026] Press SBE, KMI runs and the normally open contact is turned on and self-locked, and KT and M run at the same time. KT delays turning on when the running time reaches the set value, KM2 runs, and KM1 delays disconnecting at the same time. KM1 and KM2 realize interlocking control. The operation of KM2 will cut off the operation of M. The above is one operation cycle. After the cycle, pressing SBE again will trigger the next operation cycle, and cyclic control is realized based on this.

[0027] The above embodiments are descriptions of specific implementation methods of the present invention rather than limitations of the present invention. Technical personnel in the relevant technical field may make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. An automatic wire feeder for inverter production, characterized in that: It includes a spur gear mechanism, a single-button start-stop circuit, and a tin-discharging tube; The single button start-stop circuit includes a stepping motor, a time relay, a tin-discharging control button, a first intermediate relay, a second intermediate relay, and a 24V power supply; The stepper motor is connected to the spur gear mechanism; the stepper motor is respectively connected to one end of the time relay coil, one end of the first intermediate relay coil, one end of the second intermediate relay coil, one end of the second intermediate relay normally closed contact, one end of the second intermediate relay normally open contact, and grounded; one end of the second intermediate relay normally closed contact is connected to one end of the first intermediate relay first normally open contact; the other end of the time relay coil is respectively connected to one end of the tin-discharging control button switch, one end of the second normally open contact of the first intermediate relay, one end of the time relay delayed closing instantaneous disconnection normally open contact, and one end of the time relay delayed disconnection instantaneous closing normally closed contact; the other end of the first intermediate relay coil is connected to the other end of the time relay delayed disconnection instantaneous closing normally closed contact; the other end of the second intermediate relay coil is connected to the other end of the time relay delayed closing instantaneous disconnection normally open contact; the 24V power supply is respectively connected to the other end of the second intermediate relay normally closed contact, the other end of the tin-discharging control button switch, the other end of the first normally open contact of the first intermediate relay, and the other end of the second normally open contact of the first intermediate relay; The tin outlet is equipped with a metal tube for heat insulation and foolproofing; The opening and closing of the normally open contact of the second intermediate relay is used to control the start and stop of the stepper motor; the stepper motor is used to control the transmission of the spur gear mechanism to bite through the surface of the solder wire and transport the solder wire to the tin outlet tube.

2. The automatic wire feeder for inverter production according to claim 1, characterized in that: When the button is pressed, the wire feeder will be triggered to discharge tin at a fixed speed within a preset cycle. Long pressing or pressing the button again during the tin discharge cycle will not trigger the above tin discharge process again.

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