Automatic welding machine for thermistor chip

Abstract

The utility model discloses a thermistor chip automatic welding machine which comprises a frame body, a temperature adjusting knob is fixedly installed on the outer surface of one end of the frame body, an extrusion folding mechanism is arranged on the outer surface of the frame body, and a thermistor and an extension cord are conveniently folded and welded through the extrusion folding mechanism. According to the automatic welding machine for the thermistor chip, during welding, the first low-temperature springing soldering bit can be driven to move along with pushing-out of the air cylinder, so that a cutting block can descend along with the first low-temperature springing soldering bit, and the cutting block can be inserted into the second high-temperature soldering bit; the lead and the pin of the thermistor can be extruded and gathered together, and a solder wire is released along with the rotation of the second servo motor, so that the solder wire can be melted and is in contact with the lead and the pin of the thermistor, and the lead and the pin can be welded together, thereby facilitating the butt joint and welding of the lead and the pin of the thermistor. And the probability of pseudo soldering is reduced.

Description

Technical Field

[0001] This utility model relates to the field of thermistor welding technology, specifically an automatic thermistor chip welding machine. Background Technology

[0002] A thermistor is a type of sensitive element. Based on its temperature coefficient, it can be divided into positive temperature coefficient (PTC) and negative temperature coefficient (NTC) thermistors. Due to its temperature sensitivity, a thermistor exhibits different resistance values ​​at different temperatures. It is a semiconductor device. During the soldering and use of thermistors, to meet usage requirements and ensure the thermistor is placed in a suitable location, wires need to be soldered to the thermistor's leads. This allows the thermistor to have sufficient length to be placed over the heat-generating area. However, because thermistors are small, it is difficult to properly align the leads with the wires during soldering, making soldering extremely difficult and prone to misalignment, leading to problems such as cold solder joints and poor appearance. Utility Model Content

[0003] The purpose of this invention is to provide an automatic thermistor chip welding machine to solve the problems mentioned in the background art, such as the difficulty in connecting the extension wires and the easy occurrence of cold solder joints.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic thermistor chip welding machine, comprising a frame, a temperature control knob fixedly installed on the outer surface of one end of the frame, and the frame having a long strip design; a wire reel fixedly installed on the side surface of one end of the frame, and a wire reel inserted into the outer surface of the wire reel; the end of the frame away from the wire reel having a hollow frame design; a cylinder fixedly installed on the outer surface of the frame, with the output end of the cylinder penetrating through the outer surface of the frame; a first low-temperature spring-loaded soldering iron tip provided at one end of the frame; and a compression and gathering mechanism provided on the outer surface of the frame, which facilitates the gathering and welding of the thermistor and the extension wire.

[0005] Preferably, the extrusion and gathering mechanism includes: a cutting block, the cutting block being fixedly installed on the outer surface of a first low-temperature spring-loaded soldering iron tip; a second high-temperature soldering iron tip being fixedly installed at one end of the frame near the first low-temperature spring-loaded soldering iron tip, and a heat insulation layer being provided between the second high-temperature soldering iron tip and the frame; a groove being formed on the outer surface of the second high-temperature soldering iron tip, and the groove of the second high-temperature soldering iron tip being chamfered; the cutting block being inserted into the second high-temperature soldering iron tip, and the second high-temperature soldering iron tip being located directly below the first low-temperature spring-loaded soldering iron tip; second servo motors being fixedly installed on the outer surfaces of both ends of the first low-temperature spring-loaded soldering iron tip, and solder wire being inserted into the output end of the second servo motors; through holes being formed on both sides of the first low-temperature spring-loaded soldering iron tip, and a heat insulation layer being provided inside the through holes of the first low-temperature spring-loaded soldering iron tip, and solder wire passing through the through holes of the first low-temperature spring-loaded soldering iron tip.

[0006] Using the above technical solution, the slitting block can be moved together by the descent of the first low-temperature spring-loaded soldering iron tip, allowing the slitting block to be inserted into the second high-temperature soldering iron tip. Through the shape design of the slitting block, the leads and wires of the thermistor can be neatly gathered into the groove and concentrated together. The solder wire is released by the rotation of the second servo motor, allowing the solder wire to be discharged to the outside through the through hole of the first low-temperature spring-loaded soldering iron tip. The solder wire can extend and contact the leads and wires heated by the second high-temperature soldering iron tip and melt them, so that the leads and wires of the thermistor can be soldered together, reducing the difficulty of soldering and allowing the solder wire to be released automatically.

[0007] Preferably, a guide wheel is rotatably mounted on one end of the frame near the wire reel frame, and the outer surface of the guide wheel is provided with a groove. The outer surface of the frame is also provided with a groove, and the groove of the frame is in the same position as the groove of the guide wheel.

[0008] By adopting the above technical solution, the grooves on the outer surface of the guide wheel and the outer surface of the frame allow the wire to move directionally on the outer surface of the frame when it is released, and the guide wheel can guide the wire, reducing the probability of the wire breaking when it is pulled out.

[0009] Preferably, a clamping wheel is provided on the outer surface of one end of the frame, and the outer surface of the clamping wheel is in contact with the outer surface of the frame. A sliding elastic mechanism is provided between the frame and the clamping wheel, so that the clamping wheel can always be tightly in contact with the frame, which facilitates clamping and pushing of the wire.

[0010] Using the above technical solution, the rotation of the first servo motor can drive the pressure wheel to rotate, so that the pressure wheel can rotate to push the wire out of the groove in the frame. The wire can be pushed out a fixed distance according to the value set by the first servo motor, which facilitates automatic material discharge after welding.

[0011] Preferably, the sliding elastic mechanism includes: a slider frame, the slider frame being slidably mounted on both sides of the slider frame, and a pressure wheel being rotatably mounted on the outer surface of the slider frame; a first servo motor being fixedly mounted on the side surface of the slider frame, and the output end of the first servo motor being connected to the pressure wheel; the outer surface of the slider frame penetrating the outer surface of the frame body, and the frame body and the slider frame being slidably connected; a fixing bolt being threaded onto the outer surface of the slider frame, the fixing bolt being in contact with the outer surface of the frame body; and a spring being provided between the frame body and the slider frame.

[0012] By adopting the above technical solution, the pressure between the frame and the slider frame can be adjusted by adjusting the fixing bolts, and the downward pressure of the slider frame can be adjusted by the spring, so that the clamping wheel can contact the cable with appropriate pressure, so that the clamping wheel can always contact the wire and push the wire out through the force of rotation.

[0013] Preferably, a positioning slider is slidably installed at one end of the frame near the cylinder, and the positioning slider is connected to the output end of the cylinder. A first low-temperature spring-loaded soldering iron tip is slidably installed inside the positioning slider. The two end side surfaces of the positioning slider are higher than the side surfaces of the first low-temperature spring-loaded soldering iron tip, and the two outer surfaces of the positioning slider are in contact with the outer surface of the frame.

[0014] Using the above technical solution, the positioning slider can be pushed out by the cylinder, so that after the positioning slider descends, it can press tightly against the pins and wires of the thermistor to fix the pins and wires of the thermistor. Then, the first low-temperature spring-loaded soldering iron tip will descend and retract and fix the pins and wires of the thermistor to facilitate soldering and reduce the displacement caused by movement during soldering.

[0015] Preferably, a magnet is fixedly installed at the end of the frame away from the wire reel, a limit strip is provided on the outer surface of the frame, and a compensation piece is slidably inserted into the inside of the frame, and another magnet is fixedly installed on the outer surface of the compensation piece. The compensation piece is in contact with the limit strip of the frame, and the magnets attract each other.

[0016] Using the above technical solution, during welding, one end of the thermistor only needs to be snapped into the groove on the compensation piece and pushed into the outer surface of the frame. The compensation piece is blocked by the limiting strip on the outer surface of the frame, so that the magnets can attract and fix each other, and the lead of the thermistor can be kept flush with the surface of the frame. This makes it convenient for the lead and wire to be concentrated together. When welding thermistors of different shapes, it is only necessary to replace the compensation piece of different shapes to easily reduce the height difference between the thermistor and the frame. At the same time, different types of compensation pieces can be easily inserted into the interior of the frame.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This automatic thermistor chip welding machine:

[0018] 1. During soldering, the leads and wires of the thermistor are both above the second high-temperature soldering iron tip. As the cylinder is pushed out, it will drive the first low-temperature spring-loaded soldering iron tip to move together, so that the cutting block can fall along with it and be inserted into the second high-temperature soldering iron tip. Through the shape design of the cutting block, the wires and the leads of the thermistor can be squeezed and gathered together. As the second servo motor rotates, the solder wire is released, so that the solder wire can melt and contact the wires and the leads of the thermistor, allowing the wires and leads to be soldered together. This facilitates the connection and soldering of the wires and the leads of the thermistor, reducing the difficulty of connection and the probability of cold solder joints.

[0019] 2. During welding, the wire inside the wire reel can rotate together with the pressure roller driven by the rotation of the first servo motor. This allows the wire in the groove of the frame to move with the rotation of the pressure roller. The distance between the frame and the slider frame can be adjusted by adjusting the fixing bolts. When the wire passes through, the slider frame and the pressure roller can move up and down with the spring, ensuring that the wire is always in contact with the pressure roller. This prevents the wire from being unable to be fed out due to insufficient pressure, reduces the chance of the wire slipping and not being fed out to a certain length, and reduces the probability of insufficient length for welding due to slippage.

[0020] 3. By fixing the differential plate to the thermistor, the height difference between the thermistor pins and the frame is eliminated, reducing the offset of the thermistor pins caused by the height difference. As the cylinder descends, the first low-temperature spring-loaded soldering iron tip descends, and the positioning slider moves within the frame, allowing the positioning slider to simultaneously press the thermistor pins and wires, preventing the thermistor pins and wires from moving freely during soldering, thus reducing the probability of the thermistor pins and wires shifting during soldering. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the frame and wire reel frame of this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the slider frame and pressure wheel of this utility model;

[0023] Figure 3 This is a schematic diagram of the exploded three-dimensional structure of the slider frame and spring of this utility model;

[0024] Figure 4 This is a three-dimensional cross-sectional view of the frame and slider of this utility model;

[0025] Figure 5 This is a cross-sectional perspective view of the first soldering iron and the second high-temperature soldering iron tip of this utility model.

[0026] Figure 6 This is a cross-sectional three-dimensional structural diagram of the interpolation plate and magnet of this utility model.

[0027] In the diagram: 1. Frame; 2. Wire reel holder; 3. Guide wheel; 4. Slider holder; 5. Pressure wheel; 6. First servo motor; 7. Spring; 8. Fixing bolt; 9. Cylinder; 10. Positioning slider; 11. First low-temperature spring-loaded soldering iron tip; 12. Second servo motor; 13. Cutting block; 14. Second high-temperature soldering iron tip; 15. Compensation piece; 16. Magnet. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6 This utility model provides a technical solution: an automatic thermistor chip welding machine, including a frame 1. A temperature adjustment knob is fixedly installed on the outer surface of one end of the frame 1, and the frame 1 is a long strip design. A wire reel 2 is fixedly installed on the side surface of one end of the frame 1, and a wire reel is inserted into the outer surface of the wire reel 2. The end of the frame 1 away from the wire reel 2 is a hollow frame design. A cylinder 9 is fixedly installed on the outer surface of the frame 1, and the output end of the cylinder 9 penetrates through the outer surface of the frame 1. A first low-temperature spring-loaded soldering iron tip 11 is provided at one end of the frame 1. A compression and gathering mechanism is provided on the outer surface of the frame 1, which facilitates the gathering and welding of the thermistor and the extension wire.

[0030] When using it, the wire reel needs to be inserted and fixed above the wire reel holder 2. The solder wire roll is then inserted and fixed on both sides of the first low-temperature spring-loaded soldering iron tip 11. The heating temperature of the first low-temperature spring-loaded soldering iron tip 11 and the second high-temperature soldering iron tip 14 can be adjusted by the temperature adjustment knob, which facilitates the installation and replacement of the wire reel and solder wire roll, and enables the wire and solder wire to be automatically released during subsequent use.

[0031] The compression and gathering mechanism includes: a cutting block 13, which is fixedly installed on the outer surface of a first low-temperature spring-loaded soldering iron tip 11; a second high-temperature soldering iron tip 14 is fixedly installed on one end of the frame 1 near the first low-temperature spring-loaded soldering iron tip 11, and a heat insulation layer is provided between the second high-temperature soldering iron tip 14 and the frame 1; a groove is provided on the outer surface of the second high-temperature soldering iron tip 14, and the groove of the second high-temperature soldering iron tip 14 is chamfered; the cutting block 13 is inserted into the second high-temperature soldering iron tip 14, and the second high-temperature soldering iron tip 14 is located directly below the first low-temperature spring-loaded soldering iron tip 11; a second servo motor 12 is fixedly installed on the outer surfaces of both ends of the first low-temperature spring-loaded soldering iron tip 11, and solder wire is inserted into the output end of the second servo motor 12; through holes are provided on both sides of the first low-temperature spring-loaded soldering iron tip 11, and a heat insulation layer is provided in the through holes of the first low-temperature spring-loaded soldering iron tip 11, and solder wire passes through the through holes of the first low-temperature spring-loaded soldering iron tip 11.

[0032] After the thermistor's leads and wires are extended, the cylinder 9 pushes out, causing the first low-temperature spring-loaded soldering tip 11 to move, simultaneously lowering the slitting block 13. This allows the slitting block 13 to be inserted into the second high-temperature soldering tip 14. The chamfered groove of the second high-temperature soldering tip 14 facilitates easier insertion of the slitting block 13. The heat insulation layer reduces the temperature conducted from the second high-temperature soldering tip 14 to the frame 1. Furthermore, the design of the slitting block 13 enhances the thermistor's... The resistor leads and wires can be brought together, and the second servo motor 12 will quantitatively push out solder wire, so that the solder wire can be pushed out of the first low-temperature spring-loaded soldering iron tip 11. As the first low-temperature spring-loaded soldering iron tip 11 comes into contact with the second high-temperature soldering iron tip 14, the second high-temperature soldering iron tip 14 will heat up and melt the pushed solder wire, so that the solder wire can melt and solder the leads of the thermistor to the wires together, so that the leads of the thermistor and the wires can be brought together and facilitated for automatic soldering, reducing the difficulty of soldering alignment and reducing the probability of cold solder joints.

[0033] A guide wheel 3 is rotatably mounted on one end of the frame 1 near the wire reel frame 2, and a groove is formed on the outer surface of the guide wheel 3. The groove on the outer surface of the frame 1 is also formed, and the groove on the frame 1 is in the same position as the groove on the guide wheel 3.

[0034] After the wire reel is installed on the wire reel frame 2, the wire can be pulled out and inserted into the groove of the frame 1, and the wire can pass through the groove of the guide wheel 3. The wire can be guided and moved through the groove of the guide wheel 3 and the frame 1, so that the wire will not move randomly and cause deviation. The guide wheel 3 can also reduce the probability of the wire coming into contact with the frame 1 and being pulled off.

[0035] A clamping wheel 5 is provided on the outer surface of one end of the frame 1, and the outer surface of the clamping wheel 5 is in contact with the outer surface of the frame 1. A sliding elastic mechanism is provided between the frame 1 and the clamping wheel 5. The clamping wheel 5 can always be tightly in contact with the frame 1 through the sliding elastic mechanism, which facilitates clamping and pushing of the wire.

[0036] As the wire passes through the groove of the frame 1, it passes between the frame 1 and the clamping roller 5. The data set by the first servo motor 6 enables the clamping roller 5 to push out the wire in a fixed quantity when it rotates, which facilitates clamping and pushing out the wire.

[0037] The sliding elastic mechanism includes: a slider frame 4, which is slidably mounted on both sides of the slider frame 4, and a pressure wheel 5 is rotatably mounted on the outer surface of the slider frame 4. A first servo motor 6 is fixedly mounted on the side surface of the slider frame 4, and the output end of the first servo motor 6 is connected to the pressure wheel 5. The outer surface of the slider frame 4 penetrates the outer surface of the frame body 1, and the frame body 1 and the slider frame 4 are slidably connected. A fixing bolt 8 is threadedly mounted on the outer surface of the slider frame 4, and the fixing bolt 8 is in contact with the outer surface of the frame body 1. A spring 7 is provided between the frame body 1 and the slider frame 4.

[0038] When using it, the fixing bolt 8 needs to be adjusted in conjunction with the spring 7 so that after the wire passes through the clamping wheel 5, the slider frame 4 and the clamping wheel 5 can move up and down together. This makes it easy to adjust the distance and pressure between the frame 1 and the slider frame 4, so that the clamping wheel 5 can contact the wire with appropriate pressure. This ensures that when the clamping wheel 5 rotates, the wire can move along the groove on the frame 1, without the possibility of the wire slipping and failing to be delivered to the fixed length.

[0039] A positioning slider 10 is slidably installed at one end of the frame 1 near the cylinder 9, and the positioning slider 10 is connected to the output end of the cylinder 9. A first low-temperature spring-loaded soldering iron tip 11 is slidably installed inside the positioning slider 10. The two side surfaces of the positioning slider 10 are higher than the side surfaces of the first low-temperature spring-loaded soldering iron tip 11. The two outer surfaces of the positioning slider 10 are in contact with the outer surface of the frame 1.

[0040] When cylinder 9 is pushed out, it will move the first low-temperature spring-loaded soldering iron tip 11 together. After the first low-temperature spring-loaded soldering iron tip 11 moves, it will slide the positioning slider 10 on the outer surface of the frame 1, so that the two sides of the positioning slider 10 can clamp the wire and the thermistor pin, so that the wire and the thermistor pin cannot move during soldering, and the soldering will not fail due to the movement of the wire and the pin.

[0041] A magnet 16 is fixedly installed at one end of the frame 1 away from the wire reel 2. A limit strip is provided on the outer surface of the frame 1 and a compensation piece 15 is slidably inserted into the inside of the frame 1. Another magnet 16 is fixedly installed on the outer surface of the compensation piece 15. The compensation piece 15 is in contact with the limit strip of the frame 1 and the magnets 16 attract each other.

[0042] The interpolation piece 15 and the magnet 16 prevent the interpolation piece 15 from easily falling out after being inserted into the frame 1, facilitating the fixing of interpolation pieces 15 of different specifications. During welding, the thermistor is simply placed into the interpolation piece 15, and then the interpolation pieces 15 are stacked on the outer surface of the frame 1, positioned by fiber strips, and fixed by the magnet 16. Different interpolation pieces 15 can be used when welding thermistors of different shapes, eliminating the height difference between the thermistor leads and the frame 1. After welding, the first low-temperature spring-loaded soldering iron tip 11 and the second high-temperature soldering iron tip 14 are cooled down, and the wire can be pushed out by the rotation of the pressure roller 5. The welded wire can then be pushed out, and the thermistor can be put back into the interpolation piece 15 for re-welding. After welding, the wire can be cut with scissors to reduce the probability of welding failure due to the thermistor lead misalignment and to position the thermistor.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic thermistor chip soldering machine, comprising a frame (1), wherein a temperature control knob is fixedly installed on the outer surface of one end of the frame (1), and the frame (1) is a long strip design; a wire reel frame (2) is fixedly installed on the side surface of one end of the frame (1), and a wire reel is inserted into the outer surface of the wire reel frame (2); the end of the frame (1) away from the wire reel frame (2) is a hollow frame design; a cylinder (9) is fixedly installed on the outer surface of the frame (1), and the output end of the cylinder (9) penetrates through the outer surface of the frame (1); and a first low-temperature spring-loaded soldering iron tip (11) is provided at one end of the frame (1), characterized in that: The outer surface of the frame (1) is provided with a compression and gathering mechanism, which facilitates the gathering and welding of the thermistor and the extension line.

2. The automatic thermistor chip welding machine according to claim 1, characterized in that: The compression and gathering mechanism includes: a cutting block (13), which is fixedly installed on the outer surface of a first low-temperature spring-loaded soldering iron tip (11). A second high-temperature soldering iron tip (14) is fixedly installed on one end of the frame (1) near the first low-temperature spring-loaded soldering iron tip (11), and a heat insulation layer is provided between the second high-temperature soldering iron tip (14) and the frame (1). A groove is provided on the outer surface of the second high-temperature soldering iron tip (14), and the groove of the second high-temperature soldering iron tip (14) is chamfered. The cutting block (13) and the second high-temperature soldering iron tip (14) are connected. The hot soldering iron tip (14) is inserted into the first low temperature spring soldering iron tip (11), and the second high temperature soldering iron tip (14) is located directly below the first low temperature spring soldering iron tip (11). The outer surfaces of the two ends of the first low temperature spring soldering iron tip (11) are fixedly mounted with a second servo motor (12), and the output end of the second servo motor (12) is inserted with solder wire. The two sides of the first low temperature spring soldering iron tip (11) are provided with through holes, and the through holes of the first low temperature spring soldering iron tip (11) are provided with a heat insulation layer, and the through holes of the first low temperature spring soldering iron tip (11) are provided with solder wire.

3. The automatic thermistor chip welding machine according to claim 1, characterized in that: The frame (1) has a guide wheel (3) rotatably mounted on one end near the wire reel frame (2), and the outer surface of the guide wheel (3) has a groove. The outer surface of the frame (1) has a groove, and the groove of the frame (1) is in the same position as the groove of the guide wheel (3).

4. The automatic thermistor chip welding machine according to claim 1, characterized in that: A clamping wheel (5) is provided on the outer surface of one end of the frame (1), and the outer surface of the clamping wheel (5) is in contact with the outer surface of the frame (1). A sliding elastic mechanism is provided between the frame (1) and the clamping wheel (5). The clamping wheel (5) can always be tightly in contact with the frame (1) through the sliding elastic mechanism, which facilitates clamping and pushing of the wire.

5. The automatic thermistor chip welding machine according to claim 4, characterized in that: The sliding elastic mechanism includes: a slider frame (4), which is slidably installed on both sides of the slider frame (4), and a pressure wheel (5) is rotatably installed on the outer surface of the slider frame (4). A first servo motor (6) is fixedly installed on the side surface of the slider frame (4), and the output end of the first servo motor (6) is connected to the pressure wheel (5). The outer surface of the slider frame (4) penetrates the outer surface of the frame body (1), and the frame body (1) and the slider frame (4) are slidably connected. A fixing bolt (8) is threaded on the outer surface of the slider frame (4), and the fixing bolt (8) is in contact with the outer surface of the frame body (1). A spring (7) is provided between the frame body (1) and the slider frame (4).

6. The automatic thermistor chip welding machine according to claim 1, characterized in that: A positioning slider (10) is slidably installed at one end of the frame (1) near the cylinder (9), and the positioning slider (10) is connected to the output end of the cylinder (9). A first low-temperature spring-loaded soldering iron tip (11) is slidably installed inside the positioning slider (10). The two side surfaces of the positioning slider (10) are higher than the side surfaces of the first low-temperature spring-loaded soldering iron tip (11). The two outer surfaces of the positioning slider (10) are in contact with the outer surface of the frame (1).

7. The automatic thermistor chip welding machine according to claim 1, characterized in that: A magnet (16) is fixedly installed at one end of the frame (1) away from the wire reel frame (2). A limit strip is provided on the outer surface of the frame (1), and a compensation piece (15) is slidably inserted into the inside of the frame (1). Another magnet (16) is fixedly installed on the outer surface of the compensation piece (15). The compensation piece (15) is in contact with the limit strip of the frame (1), and the magnets (16) attract each other.

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