PTC ceramic heating element automatic welding machine

Abstract

This invention discloses an automatic welding machine for PTC ceramic heating elements, belonging to the field of mechanical processing equipment technology. It includes a wire processing station 1 (2), a wire processing station 2 (3), and a wire-to-PTC ceramic heating element connection station (4). The wire processing station 1 (2) is equipped with a wire feeding device 1 (7), a wire stripping device 1 (8), a flux feeding device 1 (9), a PTC ceramic heating element installation device (10), a PTC ceramic heating element flipping device (11), a wire shifting device (12), a flux feeding device 2 (13), and a feeding device (14). The wire processing station 2 (3) is equipped with a wire feeding device 2 (19), a wire stripping device 2 (20), a flux feeding device 3 (21), and a wire recycling device (113). This invention can realize fully automatic welding and assembly between wires and PTC ceramic heating elements, with high working efficiency and can effectively ensure welding accuracy.

Description

Technical Field

[0001] This invention belongs to the field of mechanical processing equipment technology, specifically relating to an automatic welding machine for PTC ceramic heating elements used for fully automatic assembly of wires and PTC ceramic heating elements. Background Technology

[0002] PTC resin is a high-temperature resistant, semi-crystalline thermoplastic. Currently, PTC and its modified products are commonly used in the electronics and electrical appliance fields, such as junction boxes, sockets, integrated circuit boards, plug and slot assemblies, relay components, and wireless communication equipment components. It has a good development trend in miniaturization and surface processing technology auxiliary equipment.

[0003] The welding of the PTC ceramic heating element to the wire requires first cutting the wire to a pre-set length, stripping the insulation from one or both ends of the wire, and then welding the exposed core conductor to the welding part on the PTC ceramic heating element using hot-melt solder. In existing technologies, this is either done manually, which is labor-intensive, inefficient, and prone to damage or falling off due to the small size of the PTC ceramic heating element; or the welding process is divided into different steps, transferred and processed on different equipment, forming a semi-automated assembly line. However, this method results in poor continuity between the steps, easily leading to uneven welding between the wire and the PTC ceramic heating element, and failing to guarantee the required processing precision. Summary of the Invention

[0004] The purpose of this invention is to overcome the technical problems in the existing technology, such as the low efficiency of the connection method between the wire and the PTC ceramic heating element and the inability to guarantee the welding accuracy between the wire and the PTC ceramic heating element. The invention provides an automatic PTC ceramic heating element welding machine that can automatically assemble the wire and the PTC ceramic heating element, with high working efficiency and guaranteed welding accuracy between the wire and the PTC ceramic heating element.

[0005] To solve the above-mentioned technical problems, the present invention provides an automatic PTC ceramic heating element welding machine, including a worktable. The worktable is respectively provided with a wire processing station one and a wire processing station two. A wire-to-PTC ceramic heating element connection station is provided between the wire processing station one and the wire processing station two. The wire processing station one is provided with a turntable one and a driving mechanism one for driving the turntable one to rotate. A clamping mechanism one for clamping a first wire is provided on the outer edge of the turntable one along its circumferential direction. Along the rotation direction of the turntable one, the worktable is sequentially provided with a wire feeding device one, a wire stripping device one, a flux feeding device one, a PTC ceramic heating element mounting device, a PTC ceramic heating element flipping device, a wire shifting device, a flux feeding device two, and a feeding device. A sensor is installed between the feeding device and the wire stripping device. A sensor is installed between the PTC ceramic heating element mounting device and the PTC ceramic heating element flipping device. A turntable and a drive mechanism are installed on the wire processing station. A clamping mechanism for holding a second wire is installed on the outer edge of the turntable along its circumferential direction. A wire feeding device, a wire stripping device, a flux feeding device, and a wire recycling device are sequentially installed on the worktable along the rotation direction of the turntable. A sensor is installed between the wire feeding device and the wire stripping device. A wire mounting device is installed on the wire and PTC ceramic heating element connection station. A sensor is installed between the wire mounting device and the wire recycling device.

[0006] As a further improvement of the present invention, the clamping mechanism 1 mentioned above includes a mounting block 1 arranged sequentially on the outer edge of the turntable 1 along the circumferential direction, and a clamp 1 and a clamp 2 arranged opposite to each other and respectively hinged to the mounting block 1. The lower end of the clamp 1 is configured as a clamping part 1, which is inclined toward the clamp 2. The lower end of the clamp 2 is configured as a clamping part 2, which is inclined toward the clamp 1. The upper end of the clamp 1 is configured as a connecting part 1, and the upper end of the clamp 2 is configured as a connecting part 2. An elastic element 1 is provided between the connecting part 1 and the connecting part 2. A control device 1 for controlling the opening and closing of the clamping mechanism 1 is provided at the wire feeding device 1, the PTC ceramic heating element flipping device, the wire shifting device, and the wire unloading device. The control device 1 includes a drive mechanism 3 arranged on the worktable for longitudinal driving and a clamping rod 1 arranged in the longitudinal direction at the output end of the drive mechanism 3. The lower end of the clamping rod 1 corresponds to the elastic element 1.

[0007] As a further improvement of the present invention, the clamping mechanism 2 includes a clamp 3 arranged sequentially on the upper surface of the turntable 2 along the circumferential direction and a clamp 4 arranged above the clamp 3. The turntable 2 has a through hole for the clamping rod to pass through along its own axial direction. The through holes are distributed sequentially along the circumferential direction of the turntable 2 and correspond to the clamp 4. The upper end of the clamping rod is connected to the clamp 4, and the lower end of the clamping rod is fitted with a fastener. An elastic element 2 is provided between the fastener and the lower surface of the turntable 2. The wire feeding device 2, the wire mounting device, and the wire recycling device are all provided with a control device 2 for controlling the opening and closing of the clamping mechanism 2. The control device 2 includes a drive mechanism 4 arranged below the turntable 2 for longitudinal driving and a clamping rod 2 arranged in the longitudinal direction at the output end of the drive mechanism 4. The upper end of the clamping rod 2 corresponds to the lower end of the clamping rod.

[0008] As a further improvement of the present invention, the above-mentioned wire feeding device includes a wire feeding mechanism and a wire cutting mechanism. A fixed base is provided on the worktable, and a driving mechanism five for driving the fixed base to move horizontally along the wire conveying direction. The wire feeding mechanism includes a tensioning wheel assembly and a pressure roller assembly provided on the fixed base. The pressure roller assembly is located between the tensioning wheel assembly and the wire cutting mechanism. The pressure roller assembly includes an upper pressure roller and a lower pressure roller that rotate relative to each other. A conveying pipe for the wire to pass through is provided between the pressure roller assembly and the tensioning wheel assembly, and between the pressure roller assembly and the wire cutting mechanism. The wire cutting mechanism includes an upper moving blade and a lower moving blade corresponding to the wire. A driving mechanism six is ​​provided on the worktable. The output end of the driving mechanism six is ​​provided with a connecting frame one for fixing the upper moving blade and a connecting frame two for fixing the lower moving blade. The driving mechanism six is ​​used to drive the connecting frame one and the connecting frame two to move in opposite directions.

[0009] As a further improvement of the present invention, the wire cutting mechanism is provided with a wire inner end stripping mechanism on the side facing the wire feeding mechanism. The wire inner end stripping mechanism includes an upper moving blade 2 and a lower moving blade 2 corresponding to the wire. The upper moving blade 2 is also fixed on the connecting frame 1, and the height of the lower end of the upper moving blade 2 is higher than the height of the lower end of the upper moving blade 1. The lower moving blade 2 is also fixed on the connecting frame 2, and the height of the upper end of the lower moving blade 2 is lower than the height of the upper end of the upper moving blade 1. The wire inner end stripping mechanism also includes an air blowing pipe corresponding to the lower moving blade 2. A recovery cylinder 1 is provided below the lower moving blade 2. A wire positioning mechanism 1 is provided on the side of the wire cutting mechanism away from the wire feeding mechanism. The wire positioning mechanism 1 includes an upper positioning plate 1 and a lower positioning plate 1 corresponding to the wire. A groove 1 is opened on the side of the upper positioning plate 1 facing the wire, and a groove 2 corresponding to the groove 1 is opened on the side of the lower positioning plate 1 facing the wire. A driving mechanism 7 is provided on the worktable for driving the upper positioning plate 1 and the lower positioning plate 1 to move relative to each other.

[0010] As a further improvement of the present invention, the above-mentioned wire stripping device includes a wire outer end stripping mechanism and a wire positioning mechanism. A fixed base is provided on the worktable, and a driving mechanism is provided for driving the fixed base to move horizontally in the direction of the wire. The wire outer end stripping mechanism includes an upper moving blade and a lower moving blade, which are respectively corresponding to the wire. A recovery cylinder is provided below the lower moving blade. A driving mechanism is provided on the fixed base. The output end of the driving mechanism is provided with a connecting frame 3 for fixing the upper moving blade and a connecting frame 4 for fixing the lower moving blade. The driving mechanism is used to drive the connecting frame 3 and the connecting frame 4 to move towards each other. The wire positioning mechanism includes an upper positioning plate and a lower positioning plate, which are respectively corresponding to the wire. A groove 3 is opened on the side of the upper positioning plate facing the wire, and a groove 4 corresponding to the groove 3 is opened on the side of the lower positioning plate facing the wire. A driving mechanism is provided on the worktable for driving the upper positioning plate and the lower positioning plate to move relative to each other.

[0011] As a further improvement of the present invention, the above-mentioned flux feeding device includes a storage cylinder for holding flux and a sponge for soaking flux. The storage cylinder is located below the wire, and the sponge is located inside the storage cylinder. The worktable is provided with a driving mechanism eleven for longitudinal driving, and the output end of the driving mechanism eleven is provided with a connecting frame five for fixing the sponge.

[0012] As a further improvement of the present invention, the above-mentioned PTC ceramic heating element mounting device includes a PTC ceramic heating element feeding mechanism, a solder wire feeding mechanism, and a welding mechanism. The PTC ceramic heating element feeding mechanism includes a vibratory feeder for placing the PTC ceramic heating element and a linear feeder disposed at the outlet of the vibratory feeder. A sensor corresponding to the PTC ceramic heating element is disposed at one end of the linear feeder facing the vibratory feeder. A support frame and a support frame are respectively disposed on the worktable. The solder wire feeding mechanism includes a storage container rotatably disposed on the support frame for storing solder and a pressure roller disposed on the support frame for conveying solder wire. Component 2, the pressure roller assembly 2 includes an upper pressure roller 2 and a lower pressure roller 2 that rotate relative to each other. A conveying pipe 2 for solder wire to pass through is provided between the storage tank 1 and the pressure roller assembly 2, and between the pressure roller assembly 2 and the welding mechanism 1. The welding mechanism 1 includes a heater 1 located below the clamping mechanism 1 and corresponding to the wire, and a solder tank 1 located above the heater 1. A storage cylinder 2 for placing flux and a sponge 2 for soaking flux are provided between the solder tank 1 and the linear feeder. A driving mechanism 12 for driving the sponge 2 to move longitudinally within the storage cylinder 2 is provided on the worktable.

[0013] As a further improvement of the present invention, a wire positioning mechanism three is provided between the welding mechanism and the clamping mechanism one. The wire positioning mechanism three includes an upper positioning plate three and a lower positioning plate three corresponding to the wires on the clamping mechanism one, respectively. The upper positioning plate three has a groove five on one side facing the wire, and the lower positioning plate three has a groove six corresponding to the groove five on one side facing the wire. A driving mechanism thirteen is provided on the worktable for driving the upper positioning plate three and the lower positioning plate three to move relative to each other. A feeding groove is provided at one end of the linear feeder facing the clamping mechanism one. One end of the feeding groove is connected to the linear feeder, and a baffle is provided at the other end of the feeding groove. A limiting member is provided on the linear feeder that contacts the upper surface of the PTC ceramic heating element, and the distance between the limiting member and the baffle is the length of one PTC ceramic heating element. A gripper one and a driving member one for driving the gripper one to clamp the PTC ceramic heating element are provided above the feeding groove. The gripper one can move in the longitudinal or horizontal direction under the drive of the driving mechanism fourteen.

[0014] As a further improvement of the present invention, a fixed seat three corresponding to the clamping mechanism one is provided on the workbench. The PTC ceramic heating element flipping device includes a clamping claw two disposed on the fixed seat three and opposite to the PTC ceramic heating element, and a driving component two for driving the clamping claw two to clamp the PTC ceramic heating element. The fixed seat three is provided with a mounting hole for the rotating shaft to pass through along the axial direction of the wire. One end of the rotating shaft is connected to the clamping claw two. The other end of the rotating shaft is provided with a driving mechanism fifteen for driving the rotating shaft to move in the direction of the clamping mechanism one. The fixed seat three is provided with a driving mechanism sixteen for driving the rotating shaft to rotate. The output end of the driving mechanism sixteen is provided with a pulley one. The rotating shaft is fitted with a pulley two. A belt is provided between the pulley one and the pulley two. The inner wall of the pulley two is provided with a groove along its own axial direction, and the groove is distributed along the circumferential direction of the pulley. The rotating shaft is provided with a protrusion corresponding to the groove along its own axial direction, and the protrusion is distributed along the circumferential direction of the rotating shaft.

[0015] As a further improvement of the present invention, the workbench is provided with a fixed seat four corresponding to the clamping mechanism one. The wire shifting device includes a clamping claw three disposed on the fixed seat four and corresponding to the PTC ceramic heating element, and a driving member three for driving the clamping claw three to clamp the PTC ceramic heating element. The fixed seat four is provided with a driving mechanism seventeen for driving the clamping claw three to move in the direction of the PTC ceramic heating element.

[0016] As a further improvement of the present invention, the above-mentioned wire mounting device includes a wire positioning mechanism four, a solder wire feeding mechanism two, and a welding mechanism two. The wire positioning mechanism four includes an upper positioning plate four and a lower positioning plate four, which are respectively corresponding to the wires on the clamping mechanism two. The upper positioning plate four has a groove seven on its side facing the wire, and the lower positioning plate four has a groove eight corresponding to the groove seven on its side facing the wire. The worktable is provided with a driving mechanism eighteen for driving the upper positioning plate four and the lower positioning plate four to move relative to each other. The worktable is provided with a bracket three and a bracket four. The second solder wire feeding mechanism includes a storage container 2 rotatably mounted on the third support for storing solder and a pressure roller assembly 3 rotatably mounted on the fourth support for conveying solder wire. The pressure roller assembly 3 includes an upper pressure roller 3 and a lower pressure roller 3 that rotate relative to each other. A conveying pipe 3 for solder wire to pass through is provided between the storage container 2 and the pressure roller assembly 3, and between the pressure roller assembly 3 and the welding mechanism 2. The welding mechanism 2 includes a heater 2 disposed between the first turntable and the second turntable and disposed below the lead wire, and a solder trough 2 disposed at the upper end of the heater 2.

[0017] As a further improvement of the present invention, the above-mentioned unloading device includes a conveyor belt disposed on the workbench and a driving mechanism nineteen for driving the conveyor belt to move. The conveyor belt is disposed below the turntable and is disposed between the wire feeding device and the wire mounting device.

[0018] As a further improvement of the present invention, the workbench is provided with a fixed seat five corresponding to the clamping mechanism two. The wire recycling device includes a clamping claw two disposed on the fixed seat five and opposite to the wire, and a driving member four for driving the clamping claw four to clamp the wire. The fixed seat five is provided with a driving mechanism twenty for the clamping claw four to move in the direction of the wire.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The present invention integrates the wire processing station one, the wire processing station two, and the wire-to-PTC ceramic heating element connection station onto the same workbench, allowing for the simultaneous processing of two wires and the welding of the two processed wires to the PTC ceramic heating element, or the welding of a single wire to the PTC ceramic heating element. This improves production efficiency, saves production time, and offers greater flexibility, thus saving costs. 2. The present invention, through the rotation of turntable one, causes the first wire to pass sequentially through wire feeding device one, wire stripping device one, flux feeding device one, PTC ceramic heating element mounting device, PTC ceramic heating element flipping device, wire shifting device, and flux feeding device two to complete the cutting, stripping of both inner and outer ends of the first wire, and welding between the first wire and the PTC ceramic heating element. The process is completed by turntable two. The rotation of the device causes the second wire to pass sequentially through the wire feeding device 2, the wire stripping device 2, and the flux feeding device 3, completing the cutting and stripping of the second wire at both ends. Then, the wire installation device achieves welding between the second wire and the PTC ceramic heating element. This unifies the feeding of the first wire, the second wire, and the PTC ceramic heating element, as well as the welding between the three, avoiding any deviation during processing that could lead to inaccurate welding and ensuring product quality. 3. By setting sensors between the corresponding devices, this invention can clearly detect the wire processing status and provide timely feedback, thereby improving product quality and avoiding defective products. 4. This invention uses a cam assembly to drive the movement of each processing device and mechanism, enabling synchronous start and stop of each processing step, which improves production efficiency and reduces the use of motors and cylinders, saving space on the worktable. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention.

[0021] Figure 2 This is the front view of the present invention.

[0022] Figure 3 This is a top view of the present invention.

[0023] Figure 4 This is an enlarged perspective view of the turntable of the present invention.

[0024] Figure 5 yes Figure 4 Enlarged view of section I in the middle.

[0025] Figure 6 This is an enlarged perspective view of the second turntable of the present invention.

[0026] Figure 7 This is one of the enlarged perspective views of the wire feeding device of the present invention.

[0027] Figure 8 This is the second enlarged perspective view of the wire feeding device of the present invention.

[0028] Figure 9 yes Figure 8 Enlarged view of section H in the middle.

[0029] Figure 10 This is an enlarged perspective view of the wire stripping device of the present invention.

[0030] Figure 11 This is an enlarged perspective view of the flux feeding device of the present invention.

[0031] Figure 12 This is an enlarged perspective view of the PTC ceramic heating element mounting device of the present invention.

[0032] Figure 13 This is an enlarged top view of the PTC ceramic heating element mounting device of the present invention.

[0033] Figure 14 This is an enlarged perspective view of the PTC ceramic heating element flipping device of the present invention.

[0034] Figure 15 This is an enlarged perspective view of the wire shifting device of the present invention.

[0035] Figure 16 This is an enlarged perspective view of the flux feeding device II of the present invention.

[0036] Figure 17 This is one of the enlarged perspective views of the wire feeding device II of the present invention.

[0037] Figure 18 This is the second enlarged perspective view of the wire feeding device of the present invention.

[0038] Figure 19 This invention is Figure 18 Enlarged view of part P in the middle.

[0039] Figure 20 This is an enlarged perspective view of the wire stripping device II of the present invention.

[0040] Figure 21 This is an enlarged perspective view of the flux feeding device three of the present invention.

[0041] Figure 22 This is an enlarged view of the wire mounting device of the present invention.

[0042] Figure 23 This is an enlarged view of the wire recycling device of the present invention.

[0043] Explanation of reference numerals: 1-Workbench, 2-Wire processing station one, 3-Wire processing station two, 4-Wire and PTC ceramic heating element connection station, 5-Turntable one, 6-Clamping mechanism one, 7-Wire feeding device one, 8-Wire stripping device one, 9-Fluoride feeding device one, 10-PTC ceramic heating element mounting device, 11-PTC ceramic heating element flipping device, 12-Wire shifting device, 13-Fluoride feeding device two, 14-Unloading device, 15-Sensor one, 16-Sensor two, 17-Turntable two, 18-Clamping mechanism two, 19-Wire feeding device two, 20-Wire stripping device two, 21-Fluoride feeding device three, 22-Sensor four, 23-Mounting block one, 24-Clamp one. 25-Clamping fixture 2, 26-Clamping part 1, 27-Clamping part 2, 28-Connecting part 1, 29-Connecting part 2, 30-Elastic element 1, 31-Control device 1, 32-Pressure rod 1, 33-Clamping fixture 3, 34-Clamping fixture 4, 35-Clamping rod, 36-Fastener, 37-Elastic element 2, 38-Control device 2, 39-Pressure rod 2, 40-Fixed seat 1, 41-Tensioning wheel assembly, 42-Pressure roller assembly 1, 43-Upper pressure roller 1, 44-Lower pressure roller 1, 45-Conveying pipe 1, 46-Upper moving blade 1, 47-Lower moving blade 1, 48-Connecting frame 1, 49-Connecting frame 2, 50-Upper moving blade 2, 51-Lower moving blade 2, 52-Blowing pipe, 53-Recovery cylinder 1, 54-Upper positioning plate 1, 55-Lower positioning plate 1 Positioning plate 1, 56-Groove 1, 57-Groove 2, 58-Fixed seat 2, 59-Upper moving blade 3, 60-Lower moving blade 3, 61-Recovery cylinder 2, 62-Connecting frame 3, 63-Connecting frame 4, 64-Upper positioning plate 2, 65-Lower positioning plate 2, 68-Storage cylinder 1, 69-Sponge 1, 70-Connecting frame 5, 71-Vibrating plate, 72-Linear feeder, 73-Bracket 1, 74-Pressure roller assembly 2, 75-Upper pressure roller 2, 76-Lower pressure roller 2, 77-Conveying pipe 2, 78-Heater 1, 79-Tin bath 1, 80-Storage cylinder 2, 81-Sponge 2, 82-Upper positioning plate 3, 83-Lower positioning plate 3, 86-Discharge chute, 87-Baffle, 88-Gripper 1, 89-Fixed seat 3, 90-Clamp 91-Claw 2, 92-Rotating shaft, 93-Pulley 1, 94-Belt, 95-Fixed seat 4, 96-Claw 3, 97-Upper positioning plate 4, 98-Lower positioning plate 4, 101-Bracket 3, 102-Bracket 4, 103-Storage container 2, 104-Pressure roller assembly 3, 105-Upper pressure roller 3, 106-Lower pressure roller 3, 107-Conveying pipe 3, 108-Heater 2, 109-Tin bath 2, 110-Conveyor belt, 111-Fixed seat 5, 112-Claw 4, 113-Wire recovery device, 114-Sensor 3, 115-Wire installation device, 116-Bracket 2, 117-Storage container 1, 118-Sensor 5, 119-Limit rod 1, 120-Limit rod 2. Detailed Implementation

[0044] The invention will now be further described with reference to the accompanying drawings.

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] Conversely, this invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the invention as defined in the claims. Furthermore, to provide a better understanding of the invention, certain specific details are described in detail below. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0047] like Figure 3 The PTC ceramic heating element automatic welding machine shown includes a worktable 1, on which wire processing station 2 and wire processing station 3 are respectively set. The first wire is processed by wire processing station 2 and connected to the PTC ceramic heating element. The second wire is processed by wire processing station 3. A wire-to-PTC ceramic heating element connection station 4 is set between wire processing station 2 and wire processing station 3 for connecting the PTC ceramic heating element on the first wire to the second wire.

[0048] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, a turntable 5 and a drive mechanism 1 for driving the turntable 5 to rotate are provided on the wire processing station 2. A clamping mechanism 6 for clamping the first wire is provided on the outer edge of the turntable 5 along its circumferential direction. The clamping mechanism 6 includes a mounting block 23 arranged sequentially on the outer edge of the turntable 5 along the circumferential direction, and a clamp 24 and a clamp 25 arranged opposite to each other and respectively hinged to the mounting block 23. The lower end of the clamp 24 is configured as a clamping part 26. The clamping part 26 is inclined towards the clamp 25. The lower end of the clamp 25 is configured as the clamping part 27, which is inclined towards the clamp 24, making the clamp 24 and clamp 25 scissor-like. The upper end of the clamp 24 is configured as the connecting part 28, and the upper end of the clamp 25 is configured as the connecting part 29. An elastic element 30 is provided between the connecting part 28 and the connecting part 29. In this embodiment, the elastic element 30 is configured as a tension spring. The elastic force of the elastic element 30 is used to tighten the connecting part 28 and the connecting part 29. At the same time, the clamping parts 26 and 27 will also clamp, thereby clamping the first wire.

[0049] like Figure 1 and Figure 3 As shown, the workbench 1 is sequentially equipped with a wire feeding device 7, a wire stripping device 8, a flux feeding device 9, a PTC ceramic heating element mounting device 10, a PTC ceramic heating element flipping device 11, a wire shifting device 12, a flux feeding device 13, and a unloading device 14 along the rotation direction of the turntable 5. With a reasonable workpiece layout on the workbench 1, the first wire is transferred to each device for processing by rotating the clamping mechanism 6 driven by the turntable 5. This realizes the continuous processing and production of the first wire and its connection with the PTC ceramic heating element, saving production time and improving production efficiency.

[0050] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, since the clamping mechanism 6 needs to be opened and then closed during the loading, flipping, shifting, and unloading of the first wire, control devices 31 for controlling the opening and closing of the clamping mechanism 6 are provided at the wire loading device 7, the PTC ceramic heating element flipping device 11, the wire shifting device 12, and the wire unloading device 14. The control device 31 includes a drive mechanism 3 mounted on the worktable 1 for longitudinal driving and a clamping rod 32 mounted on the output end of the drive mechanism 3 along the longitudinal direction. The lower end of the clamping rod 32 corresponds to the elastic element 30. The driving mechanism 3 drives the clamping rod 32 to move towards the elastic element 30, causing the connecting part 28 and the connecting part 29 to separate, thereby separating the clamping part 26 and the clamping part 27, allowing the first wire to be inserted or removed. When the driving mechanism 3 stops driving, the clamping rod 32 leaves, and the connecting part 28 and the connecting part 29 return to their original position due to the elastic force of the elastic element 30. The clamping part 26 and the clamping part 27 interact to clamp the wire.

[0051] like Figure 1 As shown, a sensor 15 is installed between the wire feeding device 7 and the wire stripping device 8 to detect whether the clamping mechanism 6 holds the first wire after it has been fed by the wire feeding device 7, i.e., whether the first wire has been successfully fed. A sensor 16 is installed between the PTC ceramic heating element mounting device 10 and the PTC ceramic heating element flipping device 11 to detect whether there is a PTC ceramic heating element on the first wire at the PTC ceramic heating element mounting device 10, i.e., whether the PTC ceramic heating element has been successfully installed. If sensor 15 detects that the first wire feeding has failed, or sensor 16 detects that the PTC ceramic heating element installation has failed, an alarm will be triggered, and the automatic PTC ceramic heating element welding machine will stop working. This setup helps to improve product quality and increase the yield.

[0052] like Figure 1 , Figure 3 and Figure 6 As shown, a turntable 17 and a drive mechanism 2 for driving the turntable 17 to rotate are provided on the wire processing station 2 3. A clamping mechanism 2 18 for clamping the second wire is provided on the outer edge of the turntable 17 along its circumferential direction. The clamping mechanism 2 18 includes a clamp 33 arranged sequentially on the upper surface of the turntable 17 along the circumferential direction and a clamp 4 34 arranged above the clamp 33. A through hole for the clamping rod 35 to pass through is opened on the turntable 17 along its axial direction. The through holes are distributed sequentially along the circumferential direction of the turntable 17 and correspond to the clamp 4 34. The upper end of the clamping rod 35 is connected to the clamp 4 34. A fastener 36 is sleeved on the lower end of the clamping rod 35. An elastic element 2 37 is provided between the fastener 36 and the lower surface of the turntable 17. In this embodiment, the second elastic element 37 is set as a tension spring. The elastic force of the second elastic element 37 causes the third clamp 33 and the fourth clamp 34 to work together to clamp the second wire.

[0053] like Figure 1 As shown, the workbench 1 is equipped with a wire feeding device 219, a wire stripping device 20, a flux feeding device 31, and a wire recycling device 113 arranged sequentially along the rotation direction of the turntable 2 17. With a reasonable workpiece layout on the workbench 1, the second wire is conveyed to each device for processing by rotating the clamping mechanism 2 18 driven by the turntable 2 17. The second wire is then connected to the PTC ceramic heating element on the first wire, realizing continuous processing of the second wire, saving production time and improving production efficiency.

[0054] A sensor 114 is installed between the wire feeding device 219 and the wire stripping device 220 to detect whether the clamping mechanism 218 is holding the second wire after the wire feeding device 219 has fed the wire, i.e. whether the second wire has been successfully fed. If the sensor 114 detects that the second wire feeding has failed, it will sound an alarm and the PTC ceramic heating element automatic welding machine will stop working, which helps to improve product quality and increase the yield.

[0055] like Figure 1 and Figure 3 As shown, a wire installation device 115 is provided at the wire connection station 4 to the PTC ceramic heating element. A sensor 22 is provided between the wire installation device 115 and the wire recycling device 113 to detect whether the clamping mechanism 18 after the wire installation device 115 is holding a second wire, that is, whether the second wire is successfully connected to the PTC ceramic heating element. If the sensor 22 detects the second wire, the wire recycling device 113 is activated to recycle the second wire on the clamping mechanism 18, so as to prevent the clamping mechanism 18 from bringing the second wire to the wire feeding device 19 and affecting the processing at the wire processing station 3.

[0056] like Figure 1 and Figure 6 As shown, since the feeding of the second wire, the connection between the second wire and the PTC ceramic heating element, and the retrieval of the second wire all require opening and closing the clamping mechanism 2 18, control devices 2 38 for controlling the opening and closing of the clamping mechanism 2 18 are provided at the wire feeding device 2 19, the wire mounting device 115, and the wire retrieval device 113. Control device 2 38 includes a drive mechanism 4 located below the turntable 2 17 for longitudinal driving and a clamping rod 2 39 located at the output end of the drive mechanism 4 along the longitudinal direction. The upper end of the clamping rod 2 39 corresponds to the lower end of the clamping rod 35. The drive mechanism 4 drives the clamping rod 2 39 to move towards the clamping rod 35, causing the clamping rod 35 to move upwards along the longitudinal direction, separating the clamping fixture 33 and the clamping fixture 4 34, allowing the second wire to enter or exit. When the drive mechanism 4 stops driving, the elasticity of the elastic element 2 37 resets the clamping rod 35, and the clamping fixture 33 and the clamping fixture 4 34 clamp together.

[0057] like Figure 1 , Figure 7 , Figure 8 and Figure 9 As shown, the wire feeding device 7 includes a wire feeding mechanism and a wire cutting mechanism. A fixed base 40 and a drive mechanism 5 for driving the fixed base 40 to move horizontally along the wire conveying direction are provided on the worktable 1. The wire feeding mechanism includes a tensioning wheel assembly 41 and a pressure roller assembly 42 mounted on the fixed base 40, with the pressure roller assembly 42 positioned between the tensioning wheel assembly 41 and the wire cutting mechanism. The tensioning wheel assembly 41 includes several tensioning wheels, mounted on the fixed base 40 via a connecting frame 6. The wire is wound sequentially around the tensioning wheels, which tensions the wire and facilitates its conveying. The pressure roller assembly 42 includes an upper pressure roller 43 and a lower pressure roller 44 that rotate relative to each other. A servo motor 1 is provided on the fixed base 40 to drive the lower pressure roller 44 to rotate. The rotation of the lower pressure roller 44 drives the upper pressure roller 43 to rotate, thereby conveying the wire. Because the wire is relatively soft, a conveying pipe 45 is provided between the clamping roller assembly 42 and the tensioning wheel assembly 41, as well as between the clamping roller assembly 42 and the wire cutting mechanism, to facilitate the conveying of the wire.

[0058] A gap is provided between the upper pressure roller 43 and the lower pressure roller 44 for the wire to pass through. To accommodate the conveying of wires of different sizes and thicknesses, the fixed base 40 is provided with an adjustment component 1 for adjusting the size of the gap between the upper pressure roller 43 and the lower pressure roller 44. The adjustment component 1 includes an adjustment rod 1 that is rotatably mounted on the fixed base 40 in the horizontal direction and an adjustment rod 2 that is mounted on the fixed base 40 in the longitudinal direction. One end of the adjustment rod 1 is connected to the upper pressure roller 43, and the other end of the adjustment rod 1 is connected to the upper end of the adjustment rod 2 through an elastic element 3. The lower end of the adjustment rod 2 is fixed to the fixed base 40. The elastic element 3 can be set as a tension spring. With the rotatable connection between the adjustment rod 1 and the fixed base 40 as the fulcrum, the horizontal height of the upper pressure roller 43 can be adjusted according to the thickness of the wire using the lever principle and the elastic force of the elastic element 3, which provides greater flexibility.

[0059] The wire cutting mechanism includes an upper moving blade 46 and a lower moving blade 47 corresponding to the wires respectively. A drive mechanism 6 is provided on the worktable 1. The output end of the drive mechanism 6 is provided with a connecting frame 48 for fixing the upper moving blade 46 and a connecting frame 49 for fixing the lower moving blade 47. The drive mechanism 6 is used to drive the connecting frame 48 and the connecting frame 49 to move in opposite directions, thereby causing the upper moving blade 46 and the lower moving blade 47 to move in opposite directions and cut off the outer end of the previous wire.

[0060] In this embodiment, both ends of the wire need to be stripped. Therefore, an inner wire stripping mechanism is provided on the side of the wire cutting mechanism facing the wire feeding mechanism. The distance between the wire cutting mechanism and the inner wire stripping mechanism is the length of wire that needs to be stripped. The inner wire stripping mechanism includes an upper moving blade 50 and a lower moving blade 51, each corresponding to a wire. The upper moving blade 50 is also fixed on the connecting frame 48, and the lower end of the upper moving blade 50 is higher than the lower end of the upper moving blade 46. The lower moving blade 51 is also fixed on the connecting frame 49, and the upper end of the lower moving blade 51 is lower than the upper end of the upper moving blade 46. This arrangement allows the cutting of the previous wire and the stripping of the next wire to be performed simultaneously, achieving continuous processing, higher efficiency, and reducing the installation of the drive mechanism on the worktable 1, which helps to save space and cost. A limiting rod 119 is provided longitudinally between connecting frame 1 48 and connecting frame 2 49 to control the distance between them. One end of the limiting rod 119 is fixed to connecting frame 1 48. When the driving mechanism 6 drives connecting frame 1 48 and connecting frame 2 49 to move relative to each other, so that the upper moving blade 1 46 and the lower moving blade 1 47 come into contact and just cut off the outer end of the previous wire, and the upper moving blade 2 50 and the lower moving blade 2 51 come into contact with the outer sheath of the wire and just cut off the outer sheath of the wire, so as to strip the inner end of the next wire, the other end of the limiting rod 119 comes into contact with connecting frame 2 49. At this time, the driving mechanism 6 stops driving, completing the cutting and stripping of the wire, and effectively ensuring that the upper moving blade 2 50 and the lower moving blade 2 51 only strip the wire and do not cut the wire.

[0061] The wire stripping mechanism also includes an air pipe 52 corresponding to the lower moving blade 51. A recovery cylinder 53 is located below the lower moving blade 51 to blow the stripped wire sheath into the recovery cylinder 53, preventing waste from accumulating on the worktable 1 and affecting processing. A baffle is provided between the lower moving blade 47 and the lower moving blade 51 to prevent waste from falling into the gap between them, causing cleaning difficulties. After cutting and stripping, the stripped end of the wire is conveyed to the clamping mechanism 6 by the clamping roller assembly 42, meaning the inner end of the wire is fixed within the clamping mechanism 6.

[0062] A wire positioning mechanism is provided on the side of the wire cutting mechanism away from the wire feeding mechanism. The wire positioning mechanism includes an upper positioning plate 54 and a lower positioning plate 55 corresponding to the wire. The upper positioning plate 54 has a groove 56 on the side facing the wire, and the lower positioning plate 55 has a groove 57 corresponding to the groove 56 on the side facing the wire. A drive mechanism 7 is provided on the worktable 1 to drive the upper positioning plate 54 and the lower positioning plate 55 to move relative to each other. When the upper positioning plate 54 and the lower positioning plate 55 are in contact, the grooves 56 and 57 cooperate to form a positioning hole for the wire to pass through. This serves two purposes: firstly, to determine the position of the wire in the clamping mechanism 6 when it is being fed, improving the accuracy of subsequent processing; and secondly, to clamp the wire, facilitating its cutting.

[0063] like Figure 1 , Figure 17 , Figure 18 and Figure 19 As shown, in this embodiment, the structure of the wire feeding device 219 is the same as that of the wire feeding device 17, except that the position on the workbench 1 is different. The wire feeding device 17 is arranged along the circumferential direction of the turntable 15 and is used to realize the feeding, cutting and inner end stripping of the first wire; the wire feeding device 219 is arranged along the circumferential direction of the turntable 217 and is used to realize the feeding, cutting and inner end stripping of the second wire.

[0064] like Figure 1 and Figure 10As shown, the wire stripping device 8 includes a wire outer end stripping mechanism and a wire positioning mechanism 2. A fixed base 2 58 and a drive mechanism 8 for driving the fixed base 2 58 to move horizontally towards the wire are provided on the worktable 1. The wire outer end stripping mechanism includes an upper moving blade 3 59 and a lower moving blade 3 60 corresponding to the first wire, respectively. A drive mechanism 9 is provided on the fixed base 2 58. The output end of the drive mechanism 9 is provided with a connecting frame 3 62 for fixing the upper moving blade 3 59 and a connecting frame 4 63 for fixing the lower moving blade 3 60. A limiting rod 2 120 is longitudinally positioned between connecting frame 3 62 and connecting frame 4 63 to control the distance between them. One end of the limiting rod 2 120 is fixed to connecting frame 3 62. When the driving mechanism 9 drives connecting frame 3 62 and connecting frame 4 63 to move towards each other, causing the upper moving blade 3 59 and lower moving blade 3 60 to contact the outer sheath of the conductor, just as the outer sheath of the conductor's outer end is cut, the other end of the limiting rod 2 120 contacts and abuts against connecting frame 4 63. At this point, the driving mechanism 9 stops driving. This effectively ensures that the upper moving blade 3 59 and lower moving blade 3 60 only strip the insulation of the first conductor without cutting it. The driving mechanism 8 drives the fixed base 2 58 to move the upper moving blade 3 59 and lower moving blade 3 60 in the opposite direction of the conductor, pulling out the cut outer sheath of the conductor, thus stripping the outer end of the conductor. Below the lower moving cutter 3 60, there is a recycling cylinder 2 61. Waste materials fall into the recycling cylinder 2 61 for collection, which prevents waste materials from accumulating on the worktable 1 and affecting processing.

[0065] The wire positioning mechanism 2 includes an upper positioning plate 2 64 and a lower positioning plate 2 65 corresponding to the wire. The upper positioning plate 2 64 has a groove 3 on its side facing the wire, and the lower positioning plate 2 65 has a groove 4 corresponding to the groove 3 on its side facing the wire. The worktable 1 is equipped with a drive mechanism 10 for driving the upper positioning plate 2 64 and the lower positioning plate 2 65 to move relative to each other. When the upper positioning plate 2 64 and the lower positioning plate 2 65 come into contact, the grooves 3 and 4 cooperate to form a positioning hole 2 that matches the wire. This serves two purposes: firstly, it clamps and positions the wire, aligning it with the wire stripping device 1 8 for easy stripping; secondly, it prevents excessive compression that could damage the wire during clamping.

[0066] like Figure 1 and Figure 20 As shown, in this embodiment, the structure of the wire stripping device 20 is the same as that of the wire stripping device 8, except that the positions on the workbench 1 are different. The wire stripping device 8 is arranged along the circumferential direction of the turntable 5 and is used to strip the outer end of the first wire; the wire stripping device 20 is arranged along the circumferential direction of the turntable 17 and is used to strip the outer end of the second wire.

[0067] like Figure 1 and Figure 11As shown, after the outer end of the first wire is stripped, the turntable 5 drives the clamping mechanism 6 to rotate, conveying the first wire to the flux feeding device 9. The flux feeding device 9 includes a storage cylinder 68 for holding flux and a sponge 69 for soaking in flux. The storage cylinder 68 is positioned below the first or second wire, and the sponge 69 is placed inside the storage cylinder 68. A drive mechanism 11 for longitudinal drive is provided on the worktable 1. The output end of the drive mechanism 11 has a connecting frame 70 for fixing the sponge 69. The drive mechanism 11 drives the connecting frame 70 to move the sponge 69 longitudinally within the storage cylinder 68, allowing the sponge 69 to be soaked in flux and applied to the stripped end of the first wire, facilitating subsequent soldering between the outer end of the first wire and the PTC ceramic heating element.

[0068] like Figure 1 , Figure 3 , Figure 11 , Figure 16 and Figure 21 As shown, in this embodiment, the structures of flux feeding device 213 and flux feeding device 321 are the same as those of flux feeding device 9, except that their positions on the workbench 1 are different. Flux feeding device 9 is arranged along the circumferential direction of turntable 5 and is positioned between the wire stripping device 8 and the PTC ceramic heating element mounting device 10. It is used to apply flux to the stripped end of the first wire to facilitate subsequent welding between the first wire and the PTC ceramic heating element. Flux feeding device 213 is arranged along the circumferential direction of turntable 5 and is positioned between the wire shifting device 12 and the wire mounting device 115. It is used to apply flux to the welding end of the PTC ceramic heating element. Flux feeding device 321 is arranged along the circumferential direction of turntable 217 and is positioned between the wire stripping device 20 and the wire mounting device 115. It is used to apply flux to the stripped end of the second wire. Both flux feeding device 213 and flux feeding device 31 are designed to facilitate the subsequent welding of the second wire to the PTC ceramic heating element.

[0069] like Figure 1 , Figure 12 and Figure 13As shown, turntable 5 drives clamping mechanism 6 to rotate, conveying the first wire, whose outer end has been stripped and coated with flux, to the PTC ceramic heating element mounting device 10 for installation and connection between the PTC ceramic heating element and the outer end of the first wire. The PTC ceramic heating element mounting device 10 includes a PTC ceramic heating element feeding mechanism, a solder wire feeding mechanism, and a welding mechanism. The PTC ceramic heating element feeding mechanism includes a vibratory feeder 71 for placing PTC ceramic heating elements and a linear feeder 72 located at the outlet of the vibratory feeder 71. The end of the linear feeder 72 facing the vibratory feeder 71 is equipped with a sensor 5 118 corresponding to the PTC ceramic heating element. When the PTC ceramic heating elements on the linear feeder 72 accumulate to the sensor 5 118, the vibratory feeder 71 stops feeding. After the PTC ceramic heating elements on the linear feeder 72 are sequentially installed with the first wire and carried away, resulting in a reduction in quantity, the vibratory feeder 71 continues feeding. This effectively avoids the accumulation of PTC ceramic heating elements affecting the installation and connection between the PTC ceramic heating elements and the first wire.

[0070] A material discharge trough 86 is provided at one end of the linear feeder 72 facing the clamping mechanism 6. One end of the material discharge trough 86 is connected to the linear feeder 72. The PTC ceramic heating element to be connected to the first wire is conveyed to the material discharge trough 86 for later use. A baffle 87 is provided at the other end of the material discharge trough 86 to prevent the PTC ceramic heating element from falling. Above the material discharge trough 86 is a gripper 88 and a drive unit 1 for driving the gripper 88 to clamp the PTC ceramic heating element. The drive unit 1 can be a finger cylinder. The gripper 88 can move longitudinally or horizontally under the drive of the drive mechanism 14. The gripper 88 picks up the PTC ceramic heating element at the material discharge trough 86 and conveys it to a position where it can contact the stripped end of the first wire, preparing for subsequent welding. Since one end of the discharge trough 86 is connected to the linear feeder 72, and adjacent PTC ceramic heating elements are close together, to prevent the gripper 88 from carrying away adjacent PTC ceramic heating elements when gripping them on the discharge trough 86, the linear feeder 72 is equipped with a limiting member 113 that contacts the upper surface of the PTC ceramic heating element. The distance between the limiting member 113 and the baffle 87 is the length of one PTC ceramic heating element, ensuring that the PTC ceramic heating element located in the discharge trough 86 is not affected by the limiting member 113. The limiting member 113 can limit the PTC ceramic heating element located at the end of the linear feeder 72, which is beneficial for the conveying of the PTC ceramic heating element.

[0071] A wire positioning mechanism three is provided between the welding mechanism and the clamping mechanism 6. The wire positioning mechanism three includes an upper positioning plate three 82 and a lower positioning plate three 83, which correspond to the first wire on the clamping mechanism 6, respectively. The upper positioning plate three 82 has a groove five on its side facing the first wire, and the lower positioning plate three 83 has a groove six corresponding to the groove five on its side facing the first wire. A driving mechanism thirteen is provided on the worktable 1 to drive the upper positioning plate three 82 and the lower positioning plate three 83 to move relative to each other. When the upper positioning plate three 82 and the lower positioning plate three 83 come into contact, the groove five and the groove six cooperate to form a positioning block three for the first wire to pass through. On the one hand, this can determine the position of the first wire, which is convenient for the first wire to contact the PTC ceramic heating element. On the other hand, it can clamp the first wire to facilitate subsequent welding.

[0072] The workbench 1 is equipped with a first support 73 and a second support 116. The first solder wire feeding mechanism includes a first storage container 117 rotatably mounted on the first support 73 for storing solder and a second pressure roller assembly 74 mounted on the second support 116 for conveying solder wire. The second pressure roller assembly 74 includes an upper pressure roller 75 and a lower pressure roller 76 that rotate relative to each other. A second servo motor 2 is mounted on the second support 116 to drive the lower pressure roller 76 to rotate. The rotation of the lower pressure roller 76 drives the upper pressure roller 75 to rotate, thereby conveying the solder wire. A second conveying pipe 2 77 is provided between the first storage container 117 and the second pressure roller assembly 74, and between the second pressure roller assembly 74 and the first welding mechanism, for the solder wire to pass through. This provides support and guidance for the solder wire, preventing it from drooping onto the workbench 1 and affecting the processing of other devices.

[0073] The welding mechanism includes a heater 78 located below the clamping mechanism 6 and corresponding to the first wire, and a solder bath 79 located above the heater 78 to melt the solder wire and apply the molten solder to the pre-welded portion of the first wire. Between the solder bath 79 and the linear feeder 72, there is a flux storage cylinder 80 and a flux-soaked sponge 81. The sponge 81 is located inside the storage cylinder 80. A drive mechanism 12 is provided on the worktable 1 to drive the sponge 81 to move longitudinally within the storage cylinder 80. The gripper 88 first transports the held PTC ceramic heating element above the storage cylinder 80, applies flux to the lower surface of the PTC ceramic heating element through the sponge, and then the gripper 88 transports the PTC ceramic heating element to the first wire to achieve welding. The flux helps and promotes the welding process between the wire and the lower surface of the PTC ceramic heating element.

[0074] like Figure 1 and Figure 14As shown, since the first wire is soldered to the lower surface of the PTC ceramic heating element, the second wire needs to be soldered to the side corresponding to the first wire, namely the upper surface of the PTC ceramic heating element. Therefore, the PTC ceramic heating element needs to be rotated 180° to switch the upper and lower surfaces of the PTC ceramic heating element so that the flux feeding device 213 can apply flux to the lower surface of the PTC ceramic heating element, that is, the side that is not soldered to the first wire after rotation, so as to facilitate the subsequent soldering between the stripped end of the second wire and the PTC ceramic heating element. The workbench 1 is equipped with a fixed base 3 89 corresponding to the clamping mechanism 1 6. The PTC ceramic heating element flipping device 11 includes a gripper 2 90 mounted on the fixed base 3 89 and opposite to the PTC ceramic heating element, and a driving component 2 for driving the gripper 2 90 to clamp the PTC ceramic heating element. The driving component 2 can be configured as a finger cylinder. The fixed base 3 89 has a mounting hole along the axial direction of the first wire for the rotating shaft 91 to pass through. One end of the rotating shaft 91 is connected to the gripper 2 90, and the other end of the rotating shaft 91 is equipped with a driving mechanism 15 for driving the rotating shaft 91 to move in the direction of the clamping mechanism 1 6. The driving mechanism 15 drives the rotating shaft 91 to move the gripper 2 90 in the direction of the PTC ceramic heating element, and the driving component 2 drives the gripper 2 90 to clamp the PTC ceramic heating element.

[0075] A drive mechanism sixteen is provided on the fixed base three 89 to drive the rotating shaft 91 to rotate. A pulley one 92 is provided at the output end of the drive mechanism sixteen. A pulley two 93 is sleeved on the rotating shaft 91. A belt 94 is provided between pulley one 92 and pulley two 93. The drive mechanism sixteen drives pulley one 92 to rotate. The drive mechanism sixteen can be configured as a servo motor three. Through the transmission of the belt 94, pulley two 93 rotates synchronously, realizing the rotation of the rotating shaft 91 driving the gripper two 90 to rotate. In this embodiment, the rotation angle of the rotating shaft 91 is 180°, which allows the upper and lower surfaces of the PTC ceramic heating element to be interchanged. A groove is formed on the inner wall of pulley two 93 along its axial direction, and the groove is distributed along the circumferential direction of pulley two 93. A protrusion corresponding to the groove is formed on the rotating shaft 91 along its axial direction, and the protrusion is distributed along the circumferential direction of the rotating shaft 91. Through the engagement of the groove and the protrusion, the rotation of the rotating shaft 91 and its horizontal movement along the axial direction of the mounting hole can be realized.

[0076] like Figure 1 and Figure 15As shown, after completing the above processing steps, only a small portion of the inner end of the first wire is held by the clamping mechanism 6, while the outer end, far from the clamping mechanism 6, is quite long, which is not conducive to subsequent processing. Therefore, it is necessary to adjust the position of the first wire within the clamping mechanism 6. The worktable 1 is equipped with a fixed base 4 95 corresponding to the clamping mechanism 6. The wire shifting device 12 includes a gripper 3 96 mounted on the fixed base 4 95 and corresponding to the PTC ceramic heating element, and a driving component 3 for driving the gripper 3 96 to clamp the PTC ceramic heating element. The driving component 3 can be configured as a finger cylinder. The fixed base 4 95 is equipped with a driving mechanism 17 for driving the gripper 3 96 to move towards the PTC ceramic heating element. Under the drive of the driving mechanism 17, the gripper 3 96 pushes the first wire held by it towards the clamping mechanism 6, shortening the length of the outer end of the first wire exposed outside the clamping mechanism 6, thus facilitating subsequent processing.

[0077] like Figure 1 and Figure 22 As shown, the wire mounting device 115, located between turntable 15 and turntable 27, includes a wire positioning mechanism 4, a solder wire feeding mechanism 2, and a welding mechanism 2. The wire positioning mechanism 4 includes an upper positioning plate 497 and a lower positioning plate 498 corresponding to the second wire on the clamping mechanism 28. The upper positioning plate 497 has a groove 7 on its side facing the second wire, and the lower positioning plate 498 has a groove 8 corresponding to the groove 7 on its side facing the second wire. The worktable 1 is equipped with a driving mechanism 18 for driving the upper positioning plate 497 and the lower positioning plate 498 to move relative to each other. When the upper positioning plate 497 contacts the lower positioning plate 98, the grooves 7 and 8 cooperate to form a positioning block 4 for the second wire to pass through. This determines the position of the second wire, facilitating contact between the second wire and the PTC ceramic heating element, and also clamps the second wire for subsequent welding.

[0078] The workbench 1 is equipped with a support frame 3 101 and a support frame 4 102. The solder wire feeding mechanism 2 includes a storage container 2 103 rotatably mounted on the support frame 3 101 for storing solder and a pressure roller assembly 3 104 rotatably mounted on the support frame 4 102 for conveying solder wire. The pressure roller assembly 3 104 includes an upper pressure roller 3 105 and a lower pressure roller 3 106 that rotate relative to each other. A servo motor 4 is mounted on the support frame 4 102 to drive the lower pressure roller 3 106 to rotate. The rotation of the lower pressure roller 3 106 drives the upper pressure roller 3 105 to rotate, thereby conveying the solder wire. Conveying pipes 3 107 are provided between the storage container 2 103 and the pressure roller assembly 3 104, and between the pressure roller assembly 3 104 and the welding mechanism 2, for the solder wire to pass through. These pipes support and guide the solder wire, preventing it from drooping onto the workbench 1 and affecting the processing of other devices.

[0079] like Figure 1 , Figure 3 and Figure 22 As shown, the welding mechanism two includes a heater two 108 disposed between turntable one 5 and turntable two 17 and below the second wire, and a solder bath two 109 disposed above the heater two 108 to melt the solder wire and apply the molten solder to the pre-welded part of the PTC ceramic heating element to achieve welding. The PTC ceramic heating element has been coated with flux by flux feeding device two 13, and the outer end of the second wire has been coated with flux by flux feeding device three 21, which facilitates the welding between the PTC ceramic heating element and the second wire.

[0080] like Figures 1 to 3 As shown, the unloading device 14 includes a conveyor belt 110 mounted on the workbench 1 and a drive mechanism 19 for driving the conveyor belt 110. The drive mechanism 19 can be configured as a servo motor 5. The conveyor belt 110 is located below the turntable 5 and is positioned between the wire feeding device 7 and the wire mounting device 115. After processing and assembly, the finished products fall onto the conveyor belt 110 for transport, facilitating subsequent collection and sorting.

[0081] like Figure 1 and Figure 23 As shown, to prevent installation failure at the wire mounting device 115, the clamping mechanism 2 18 also holds a second wire. With the rotation of the turntable 2 17, the incompletely assembled second wire is brought back to the wire feeding device 2 19, affecting processing. The worktable 1 is equipped with a fixed seat 5 111 corresponding to the clamping mechanism 2 18. The wire recycling device 113 includes a gripper 4 112 mounted on the fixed seat 5 111 and opposite to the second wire, and a driving component 4 for driving the gripper 4 112 to clamp the second wire. The driving component 4 can be a finger cylinder. The fixed seat 5 111 is equipped with a driving mechanism 20 for moving the gripper 4 112 towards the second wire. Driven by the driving mechanism 20, the gripper 4 112 pulls off the clamped second wire for recycling, ensuring that there is no second wire on the clamping mechanism 2 18 returning to the wire feeding device 2 19, thus ensuring processing at the wire processing station 2 3.

[0082] like Figure 1As shown, in this embodiment, a cam assembly is provided below the worktable 1. Drive mechanisms 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, and 20 are respectively connected to the cam assembly to achieve drive and realize a reasonable spatial layout. As another option, a servo motor or cylinder can also be used as the drive mechanism.

[0083] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the present invention, and these should also be considered to fall within the protection scope of the present invention.

Claims

1. An automatic welding machine for PTC ceramic heating elements, comprising a worktable (1), characterized in that, The workbench (1) is provided with a wire processing station 1 (2) and a wire processing station 2 (3). A wire-to-PTC ceramic heating element connection station (4) is provided between the wire processing station 1 (2) and the wire processing station 2 (3). The wire processing station 1 (2) is provided with a turntable 1 (5) and a drive mechanism 1 for driving the turntable 1 (5) to rotate. The outer edge of the turntable 1 (5) is provided with a clamping mechanism 1 (6) for clamping the first wire along its circumferential direction. The workbench (1) is provided with the following components in sequence along the rotation direction of the turntable (5): a wire feeding device (7), a wire stripping device (8), a flux feeding device (9), a PTC ceramic heating element mounting device (10), a PTC ceramic heating element flipping device (11), a wire shifting device (12), a flux feeding device (2) (13), and a feeding device (14). A sensor (15) is provided between the wire feeding device (7) and the wire stripping device (8). A sensor 2 (16) is provided between the PTC ceramic heating element mounting device (10) and the PTC ceramic heating element flipping device (11). A turntable 2 (17) and a driving mechanism 2 for driving the turntable 2 (17) to rotate are provided on the wire processing station 2 (3). A clamping mechanism 2 (18) for clamping the second wire is provided on the outer edge of the turntable 2 (17) along its circumferential direction. The worktable (1) is arranged sequentially along the rotation direction of the turntable 2 (17). The device includes a wire feeding device 2 (19), a wire stripping device 2 (20), a flux feeding device 3 (21), and a wire recycling device (113). A sensor 3 (114) is installed between the wire feeding device 2 (19) and the wire stripping device 2 (20). A wire mounting device (115) is installed at the wire-to-PTC ceramic heating element connection station (4). A sensor 4 (22) is installed between the wire mounting device (115) and the wire recycling device (113). The workbench (1) is provided with a fixed base three (89) corresponding to the clamping mechanism one (6). The PTC ceramic heating element flipping device (11) includes a clamping jaw two (90) disposed on the fixed base three (89) and opposite to the PTC ceramic heating element, and a driving component two for driving the clamping jaw two (90) to clamp the PTC ceramic heating element. The fixed base three (89) is provided with a mounting hole along the axial direction of the wire for the rotating shaft (91) to pass through. One end of the rotating shaft (91) is connected to the clamping jaw two (90), and the other end of the rotating shaft (91) is provided with a tool for driving the rotating shaft (91) toward the clamping mechanism one (6). The fifteenth driving mechanism for directional movement, the sixteenth driving mechanism for driving the rotating shaft (91) to rotate is provided on the fixed base three (89), the output end of the sixteenth driving mechanism is provided with a pulley one (92), the rotating shaft (91) is sleeved with a pulley two (93), a belt (94) is provided between the pulley one (92) and the pulley two (93), the inner wall of the pulley two (93) is provided with a groove along its own axial direction, and the groove is distributed along the circumferential direction of the pulley two (93), the rotating shaft (91) is provided with a protrusion corresponding to the groove along its own axial direction, and the protrusion is distributed along the circumferential direction of the rotating shaft (91).

2. The automatic welding machine for PTC ceramic heating elements according to claim 1, characterized in that, The clamping mechanism 1 (6) includes a mounting block 1 (23) arranged sequentially along the outer edge of the turntable 1 (5) in the circumferential direction, and a clamp 1 (24) and a clamp 2 (25) arranged opposite to each other and respectively hinged to the mounting block 1 (23). The lower end of the clamp 1 (24) is configured as a clamping part 1 (26), which is inclined toward the clamp 2 (25). The lower end of the clamp 2 (25) is configured as a clamping part 2 (27), which is inclined toward the clamp 1 (24). The upper end of the clamp 1 (24) is configured as a connecting part 1 (28), and the upper end of the clamp 2 (25) is configured as a connecting part 2. (29) An elastic element (30) is provided between the first connecting part (28) and the second connecting part (29). A control device (31) for controlling the opening and closing of the clamping mechanism (6) is provided at the first wire feeding device (7), the PTC ceramic heating element flipping device (11), the wire shifting device (12) and the wire unloading device (14). The control device (31) includes a driving mechanism (3) that is set on the worktable (1) for longitudinal driving and a clamping rod (32) that is set at the output end of the driving mechanism (3) in the longitudinal direction. The lower end of the clamping rod (32) corresponds to the elastic element (30).

3. The automatic welding machine for PTC ceramic heating elements according to claim 2, characterized in that, The clamping mechanism two (18) includes a clamp three (33) arranged sequentially on the upper surface of the turntable two (17) along the circumferential direction and a clamp four (34) arranged above the clamp three (33). The turntable two (17) has through holes along its own axial direction for the clamping rod (35) to pass through. The through holes are arranged sequentially along the circumferential direction of the turntable two (17) and correspond to the clamp four (34). The upper end of the clamping rod (35) is connected to the clamp four (34), and the lower end of the clamping rod (35) is fitted with a fastener (36). The fastener (36) and An elastic element 2 (37) is provided between the lower surfaces of the turntable 2 (17). A control device 2 (38) for controlling the opening and closing of the clamping mechanism 2 (18) is provided at the wire feeding device 2 (19), the wire mounting device (115), and the wire recycling device (113). The control device 2 (38) includes a drive mechanism 4 that is located below the turntable 2 (17) for longitudinal driving and a clamping rod 2 (39) located at the output end of the drive mechanism 4 along the longitudinal direction. The upper end of the clamping rod 2 (39) corresponds to the lower end of the clamping rod (35).

4. The automatic welding machine for PTC ceramic heating elements according to claim 2, characterized in that, The wire feeding device 1 (7) includes a wire feeding mechanism and a wire cutting mechanism. The workbench (1) is provided with a fixed seat 1 (40) and a driving mechanism 5 for driving the fixed seat 1 (40) to move horizontally along the wire conveying direction. The wire feeding mechanism includes a tensioning wheel assembly (41) and a pressure roller assembly 1 (42) disposed on the fixed seat 1 (40). The pressure roller assembly 1 (42) is disposed between the tensioning wheel assembly (41) and the wire cutting mechanism. The pressure roller assembly 1 (42) includes an upper pressure roller 1 (43) and a lower pressure roller 1 (44) that rotate relative to each other. (42) A conveying pipe (45) for the wire to pass through is provided between the tensioning roller assembly (41) and between the pressure roller assembly (42) and the wire cutting mechanism. The wire cutting mechanism includes an upper moving blade (46) and a lower moving blade (47) corresponding to the wire. A driving mechanism (6) is provided on the worktable (1). The output end of the driving mechanism (6) is provided with a connecting frame (48) for fixing the upper moving blade (46) and a connecting frame (49) for fixing the lower moving blade (47). The driving mechanism (6) is used to drive the connecting frame (48) and the connecting frame (49) to move in opposite directions.

5. The automatic welding machine for PTC ceramic heating elements according to claim 4, characterized in that, The wire cutting mechanism is provided with a wire inner end stripping mechanism on the side facing the wire feeding mechanism. The wire inner end stripping mechanism includes an upper moving blade (50) and a lower moving blade (51) corresponding to the wire. The upper moving blade (50) is also fixed on the connecting frame (48), and the lower end of the upper moving blade (50) is higher than the lower end of the upper moving blade (46). The lower moving blade (51) is also fixed on the connecting frame (49), and the upper end of the lower moving blade (51) is lower than the upper end of the upper moving blade (46). The wire inner end stripping mechanism also includes an air blowing pipe (5) corresponding to the lower moving blade (51). 2) A recycling cylinder (53) is provided below the lower moving blade (51). A wire positioning mechanism is provided on the side of the wire cutting mechanism away from the wire feeding mechanism. The wire positioning mechanism includes an upper positioning plate (54) and a lower positioning plate (55) corresponding to the wire. The upper positioning plate (54) has a groove (56) on the side facing the wire. The lower positioning plate (55) has a groove (57) corresponding to the groove (56) on the side facing the wire. A driving mechanism (7) is provided on the worktable (1) for driving the upper positioning plate (54) and the lower positioning plate (55) to move relative to each other.

6. The automatic welding machine for PTC ceramic heating elements according to claim 2, characterized in that, The wire stripping device 1 (8) includes a wire outer end stripping mechanism and a wire positioning mechanism 2. The workbench (1) is provided with a fixed seat 2 (58) and a driving mechanism 8 for driving the fixed seat 2 (58) to move horizontally in the direction of the wire. The wire outer end stripping mechanism includes an upper moving blade 3 (59) and a lower moving blade 3 (60) corresponding to the wire respectively. A recovery cylinder 2 (61) is provided below the lower moving blade 3 (60). A driving mechanism 9 is provided on the fixed seat 2 (58). The output end of the driving mechanism 9 is provided with a connecting frame 3 (62) for fixing the upper moving blade 3 (59) and a fixing... The connecting frame four (63) of the lower moving blade three (60) is fixed. The driving mechanism nine is used to drive the connecting frame three (62) and the connecting frame four (63) to move towards each other. The wire positioning mechanism two includes an upper positioning plate two (64) and a lower positioning plate two (65) respectively corresponding to the wire. The upper positioning plate two (64) has a groove three on one side facing the wire. The lower positioning plate two (65) has a groove four corresponding to the groove three on one side facing the wire. The worktable (1) is provided with a driving mechanism ten for driving the upper positioning plate two (64) and the lower positioning plate two (65) to move relative to each other.

7. The automatic welding machine for PTC ceramic heating elements according to claim 2, characterized in that, The flux feeding device 1 (9) includes a storage cylinder 1 (68) for holding flux and a sponge 1 (69) for soaking flux. The storage cylinder 1 (68) is located below the wire, and the sponge 1 (69) is located inside the storage cylinder 1 (68). The workbench (1) is provided with a drive mechanism 11 for longitudinal driving, and the output end of the drive mechanism 11 is provided with a connecting frame 5 (70) for fixing the sponge 1 (69).

8. The automatic welding machine for PTC ceramic heating elements according to claim 2, characterized in that, The PTC ceramic heating element mounting device (10) includes a PTC ceramic heating element feeding mechanism, a solder wire feeding mechanism, and a welding mechanism. The PTC ceramic heating element feeding mechanism includes a vibratory feeder (71) for placing the PTC ceramic heating element and a linear feeder (72) located at the outlet of the vibratory feeder (71). The linear feeder (72) has a sensor (118) corresponding to the PTC ceramic heating element at one end facing the vibratory feeder (71). The worktable (1) is provided with a support (73) and a support (116). The solder wire feeding mechanism includes a storage container (117) rotatably mounted on the support (73) for storing solder and a pressure roller assembly (74) mounted on the support (116) for conveying solder wire. The pressure roller assembly (74) 4) Includes an upper pressure roller 2 (75) and a lower pressure roller 2 (76) that rotate relative to each other. A conveying pipe 2 (77) for solder wire to pass through is provided between the storage container 1 (117) and the pressure roller assembly 2 (74) and between the pressure roller assembly 2 (74) and the welding mechanism 1. The welding mechanism 1 includes a heater 1 (78) located below the clamping mechanism 1 (6) and corresponding to the wire, and a solder tank 1 (79) located at the upper end of the heater 1 (78). A storage cylinder 2 (80) for placing flux and a sponge 2 (81) for soaking flux are provided between the solder tank 1 (79) and the linear feeder (72). A driving mechanism 12 for driving the sponge 2 (81) to move in the longitudinal direction in the storage cylinder 2 (80) is provided on the worktable (1).

9. The automatic welding machine for PTC ceramic heating elements according to claim 8, characterized in that, A wire positioning mechanism three is provided between the welding mechanism and the clamping mechanism one (6). The wire positioning mechanism three includes an upper positioning plate three (82) and a lower positioning plate three (83) corresponding to the wires on the clamping mechanism one (6). The upper positioning plate three (82) has a groove five on one side facing the wire, and the lower positioning plate three (83) has a groove six corresponding to the groove five on one side facing the wire. A driving mechanism thirteen is provided on the worktable (1) for driving the upper positioning plate three (82) and the lower positioning plate three (83) to move relative to each other. The end of the linear feeder (72) facing one end of the clamping mechanism one (6) is... A feeding trough (86) is provided, one end of which is connected to the linear feeder (72), and the other end of which is provided with a baffle (87). The linear feeder (72) is provided with a limiting member that contacts the upper surface of the PTC ceramic heating element, and the distance between the limiting member and the baffle (87) is the length of one PTC ceramic heating element. Above the feeding trough (86) are a gripper (88) and a driving member for driving the gripper (88) to clamp the PTC ceramic heating element. The gripper (88) can move in the longitudinal or horizontal direction under the drive of the driving mechanism fourteen.

10. The automatic welding machine for PTC ceramic heating elements according to claim 2, characterized in that, The workbench (1) is provided with a fixed seat four (95) corresponding to the clamping mechanism one (6). The wire shifting device (12) includes a clamp three (96) provided on the fixed seat four (95) and corresponding to the PTC ceramic heating element, and a driving member three for driving the clamp three (96) to clamp the PTC ceramic heating element. The fixed seat four (95) is provided with a driving mechanism seventeen for driving the clamp three (96) to move in the direction of the PTC ceramic heating element.

11. The automatic welding machine for PTC ceramic heating elements according to claim 3, characterized in that, The wire mounting device (115) includes a wire positioning mechanism four, a solder wire feeding mechanism two, and a welding mechanism two. The wire positioning mechanism four includes an upper positioning plate four (97) and a lower positioning plate four (98) corresponding to the wires on the clamping mechanism two (18). The upper positioning plate four (97) has a groove seven on one side facing the wire, and the lower positioning plate four (98) has a groove eight corresponding to the groove seven on one side facing the wire. The worktable (1) is provided with a driving mechanism eighteen for driving the upper positioning plate four (97) and the lower positioning plate four (98) to move relative to each other. The worktable (1) is provided with a bracket three (101) and a bracket four (102). The solder wire feeding mechanism two includes a component rotatably mounted on the bracket. The third (101) includes a storage container two (103) for storing solder and a pressure roller assembly three (104) rotatably mounted on the support four (102) for conveying solder wire. The pressure roller assembly three (104) includes an upper pressure roller three (105) and a lower pressure roller three (106) that rotate relative to each other. A conveying pipe three (107) for solder wire to pass through is provided between the storage container two (103) and the pressure roller assembly three (104) and between the pressure roller assembly three (104) and the welding mechanism two. The welding mechanism two includes a heater two (108) located between the turntable one (5) and the turntable two (17) and located below the wire, and a solder tank two (109) located at the upper end of the heater two (108).

12. The automatic welding machine for PTC ceramic heating elements according to claim 2, characterized in that, The feeding device (14) includes a conveyor belt (110) disposed on the workbench (1) and a drive mechanism nineteen for driving the conveyor belt (110) to convey. The conveyor belt (110) is disposed below the turntable (5) and is disposed between the wire feeding device (7) and the wire mounting device (115).

13. The automatic welding machine for PTC ceramic heating elements according to claim 3, characterized in that, The workbench (1) is provided with a fixed seat five (111) corresponding to the clamping mechanism two (18). The wire recycling device (113) includes a clamp four (112) disposed on the fixed seat five (111) and opposite to the wire, and a driving member four for driving the clamp four (112) to clamp the wire. The fixed seat five (111) is provided with a driving mechanism twenty for the clamp four (112) to move in the direction of the wire.

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