A stress-free temperature sensor back-welding fixture and processing technology

Abstract

The present application relates to a stress-free temperature sensor reverse soldering fixture and processing technology, which belongs to the technical field of sensor production. The temperature sensor reverse soldering fixture includes a first mounting plate, a second mounting plate and a welding mechanism. The first mounting plate is provided with a first mounting groove for embedding a temperature-sensitive resistor, and the second mounting plate is provided with a second mounting groove for embedding a wire. The welding mechanism includes a sliding platform and a welding machine. The first mounting plate and the second mounting plate are used to be installed on the sliding platform, and the second mounting plate is located above the first mounting plate. The sliding platform is provided with a number of positioning grooves, and every two positioning grooves correspond to a temperature resistor. Each positioning groove is used for embedding a wire and a lead of the temperature resistor. When the sliding platform moves forward a certain distance, the welding machine spot welds the wire and the lead of the temperature-sensitive resistor once. In addition to improving the welding quality and welding efficiency of the temperature sensor, the present application also has the effect of alleviating and eliminating the stress on the pins of the temperature chip after the temperature sensor is packaged, thereby improving the life and reliability of the product.

Description

Technical Field

[0001] The present application relates to the technical field of sensor production, and in particular to a stress-free temperature sensor back-welding tooling and processing technology. Background Art

[0002] Temperature sensors are a common type of sensor in everyday life. Compared to other sensors, they primarily utilize the principle that the resistance of a temperature-sensitive resistor changes with temperature, reflecting temperature changes through changes in current. During the production and installation of temperature sensors, the electrical connection between the temperature-sensitive resistor and the wires is a critical process. This involves electrically connecting the two leads of the temperature-sensitive resistor to the two wires using spot welding or other welding methods.

[0003] Regarding the above-mentioned related technologies, the inventors found the following defects: the outer diameters of the two leads on the temperature-sensitive resistor are generally very small, and the outer diameter of the wires themselves is also relatively small. During welding, people need to manually align the ends of the leads on the temperature-sensitive resistor with the wires and fit them together, and then weld and fix them by laser spot welding to achieve electrical connection. This welding process has very high requirements for the welding skills of the welding master. If the lead ends cannot be aligned or the laser welding point position is not aligned, it is easy to cause poor contact between the leads and the wires, resulting in the manual welding yield always failing to reach a high level. In addition, the welder's work experience requirements are high, which invisibly increases the company's labor costs. Summary of the Invention

[0004] In order to improve the welding quality and welding efficiency of temperature sensors, the present application provides a temperature sensor back-welding tool and process.

[0005] The present application provides a temperature sensor back-welding fixture, which adopts the following technical solution:

[0006] A temperature sensor inverted soldering tool includes a first mounting plate, a second mounting plate and a welding mechanism, wherein the first mounting plate is provided with a first mounting groove for embedding the lead of a temperature-sensitive resistor, and the second mounting plate is provided with a second mounting groove for embedding the wire, and the welding mechanism includes a sliding platform and a welding machine, the first mounting plate and the second mounting plate are used to be mounted on the sliding platform, and the second mounting plate is located above the first mounting plate, and the sliding platform is provided with a plurality of positioning grooves, each two positioning grooves corresponding to a temperature resistor, and each positioning groove is used to embed a wire and a lead of the temperature-sensitive resistor, and when the sliding platform moves forward a certain distance, the welding machine spot welds the wire and the lead of the temperature-sensitive resistor once.

[0007] Optionally, a pressing member is provided on the sliding platform, and the pressing member is located on a side of the positioning groove away from the first mounting plate, and the pressing member is used to press the ends of the wire and the temperature sensitive resistor lead.

[0008] Optionally, the temperature sensor back-welding fixture further includes a shearing machine. After the shearing machine completes pre-welding of the wire and the temperature-sensitive resistor, the slide table moves to the shearing machine position. A welding receiving platform is provided on the slide table for placing the wire and the lead of the temperature-sensitive resistor. The welding receiving platform is located between the positioning slot and the first mounting platform. The shearing machine has a movable cutting blade, and a clearance cut is provided between the positioning slot and the welding receiving platform for the cutting blade to be inserted.

[0009] Optionally, the temperature sensor back-welding tool further includes an argon arc welder having a placement table. After the cutting blades have completed cutting the wires and the leads of the temperature-sensitive resistor, the first and second mounting plates are placed on the placement table. The argon arc welder is used to perform a secondary welding fixation on the wires and the leads of the temperature-sensitive resistor on the placement table.

[0010] Optionally, a flipping mechanism is provided on the placement table, and a placement groove is provided on the placement table for placing the first mounting plate and the second mounting plate. A contact plate is movably provided on the placement table for surrounding the placement groove and abutting against the side wall of the first mounting plate. The flipping mechanism includes a sliding rotating motor, a rotating disk provided at the end of the output shaft of the rotating motor, and a rotating shaft provided on the rotating disk. A rotating hole is provided on the first mounting plate for inserting the rotating shaft, and the rotating shaft is used to drive the first mounting plate to flip upward by 0°.

[0011] Optionally, a clearance opening is defined in the first mounting plate, and a flip baffle is slidably disposed within the first mounting plate for filling the clearance opening. A control rod is disposed on the rotating disk, and the flip baffle has an inclined wall for abutting the end of the control rod. When the control rod is inserted into the first mounting plate and abuts the inclined wall, the flip baffle moves upward.

[0012] Optionally, a material receiving box is provided below the placement table, and the placement table has two symmetrically arranged movable plates, and the placement slots are opened on the two movable plates. When the two movable plates move away from each other, the first mounting plate and the second mounting plate fall from the placement slots into the material receiving box below.

[0013] A temperature sensor inverted soldering process:

[0014] S1: The temperature sensitive resistor is fixedly mounted on the first mounting plate, the wire is fixedly mounted on the second mounting plate, the lead of the temperature sensitive resistor is embedded in the first mounting groove, and the wire is embedded in the second mounting groove.

[0015] S2: The first mounting plate and the second mounting plate are fixedly mounted on a sliding table, and the sliding table is started to move toward the welding machine and the shearing machine in sequence, and the welding machine performs welding.

[0016] S3: Place the cut first mounting plate and the second mounting plate in an argon arc welding machine, and perform secondary welding on the wires and leads to fix them.

[0017] S4: The rotating shaft and the control rod are inserted into the first mounting plate, and the first mounting plate is turned upward by 0° under the driving action of the rotating motor.

[0018] S5: The two movable plates move away from each other, and the first mounting plate and the second mounting plate fall into the receiving box.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. The leads and wires are positioned by setting the first and second mounting plates and the positioning grooves, and then automatically fixed by spot welding by the welding machine. This reduces labor costs, increases the production efficiency of the temperature sensor, and reduces the occurrence of defective welding products.

[0021] 2. By setting up a flip mechanism, the first mounting plate is flipped upward 180°, so that the temperature-sensitive resistor and the lead are located on both sides of the solder joint. A bend is formed on the lead, providing a certain distance buffer space for the lead. When the solder joint is directly subjected to external tensile stress, the lead is less likely to fall off and break at the solder joint;

[0022] 3. By setting a movable flip baffle, the length of the bending arc is reduced, making the structure of the temperature sensor itself more compact, and during the welding process, the flip baffle is locked in the first mounting plate, so it is not easy to interfere with the welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the connection structure between the temperature sensitive resistor and the wire after the reverse soldering is completed in the embodiment of the present application.

[0024] Figure 2 It is a schematic diagram of the installation structure of the second mounting plate and the wires in an embodiment of the present application.

[0025] Figure 3 It is a structural diagram of the welding mechanism and shearing machine in the embodiment of the present application.

[0026] Figure 4 It is a structural diagram of the mobile station in an embodiment of the present application.

[0027] Figure 5 It is a structural schematic diagram of a shearing machine in another embodiment of the application.

[0028] Figure 6 It is a structural schematic diagram of the argon arc welding machine in an embodiment of the present application.

[0029] Figure 7 It is a structural schematic diagram of the placement table in an embodiment of the present application.

[0030] Figure 8 It is a schematic diagram of the back structure of the placement table in the embodiment of the present application.

[0031] Figure 9 It is a schematic diagram of the exploded structure of the flip mechanism and the first mounting plate in an embodiment of the present application.

[0032] Figure 10 This is a schematic diagram of the bending shape of the lead wire when a blocking plate is placed in an embodiment of the present application.

[0033] Figure 11 It is a partial structural diagram of the flipping mechanism in another embodiment.

[0034] Figure 12 It is a partial structural diagram of the flip mechanism in another embodiment with the push plate in a hidden state.

[0035] Explanation of the accompanying symbols: 1. welding mechanism; 11. sliding table; 111. positioning column; 112. positioning groove; 113. pressing member; 114. welding receiving platform; 115. making way cutting seam; 12. welding machine; 2. shearing machine; 21. cutting blade; 3. argon arc welding machine; 4. placing table; 41. moving plate; 42. abutting plate; 43. receiving box; 44. inclined slide; 45. placing groove; 46. receiving plate; 461. pulling groove; 47. pushing cylinder; 48. reset spring; 5. turning mechanism; 51. rotating motor; 52. rotating disk; 53. rotating shaft; 54. control lever; 6. first mounting plate; 61. making way opening; 62. turning baffle; 621. inclined wall; 7. second mounting plate; 71. second mounting groove; 8. temperature sensitive resistor; 81. lead; 82. bending arc; 9. wire. DETAILED DESCRIPTION

[0036] The following is a further detailed description of this application in conjunction with the accompanying drawings 1-12.

[0037] Reference Figure 1The present invention discloses a stress-free temperature sensor inverted soldering fixture. The temperature sensor inverted soldering fixture is used to solder two wires 9 to two leads 81 of a temperature sensitive resistor 8 to achieve electrical connection between the temperature sensitive resistor 8 and the wires 9.

[0038] Reference Figure 1-10 The stress-free temperature sensor reverse soldering fixture includes a first mounting plate 6, a second mounting plate 7, and a welding mechanism 1. The first mounting plate 6 is provided with a first mounting groove for embedding the lead 81 of the temperature sensor, and the second mounting plate 7 is provided with a second mounting groove 71 for embedding the wire 9. The welding mechanism 1 includes a sliding table 11 and a welding machine 12. After the temperature-sensitive resistor 8 is installed on the first mounting plate 6 and the wire 9 is installed on the second mounting plate 7, the first mounting plate 6 and the second mounting plate 7 are preliminarily packaged with tape to prevent the temperature-sensitive resistor 8 and the wire 9 from falling off the first mounting plate 6 and the second mounting plate 7. Then the first mounting plate 6 is placed on the sliding table 11, and the second mounting plate 7 is aligned and placed directly above the first mounting plate 6. A positioning column 111 is provided on the sliding table 11, so that the first mounting plate 6 and the second mounting plate 7 can be aligned, and the first mounting plate 6 and the second mounting plate 7 are not easy to shake relative to each other during the movement of the sliding table 11. It is worth noting that a recess is provided on the side of the first mounting plate 6 close to the second mounting plate 7 for embedding the resistor portion of the temperature-sensitive resistor 8. This prevents the second mounting plate 7 from directly pressing onto the temperature-sensitive resistor 8 after the second mounting plate 7 is pressed onto the first mounting plate 6, thereby preventing the temperature-sensitive resistor 8 from being damaged.

[0039] The slide table 11 is provided with a plurality of positioning slots 112, with each slot 112 forming a group of two. Each slot 112 is used to receive a wire 9 and a lead 81 of the temperature-sensitive resistor 8. After the first mounting plate 6 is mounted on the slide table 11, the ends of the two leads 81 of the temperature-sensitive resistor 8 are respectively inserted into the two positioning slots 112. The second mounting plate 7 is then installed, and the wires 9 are then inserted into the positioning slots 112. At this point, the leads 81 and the wires 9 are in close contact with each other.

[0040] The slide table 11 then moves forward intermittently. Each time the slide table 11 moves forward a short distance, the welding head on the welding machine 12 moves downward a short distance, and then welds the lead 81 and the wire 9. The welding machine 12 then resets and waits for the next forward movement of the slide table 11 to perform a second welding fixation. The slide table 11 is driven by a motor screw. The motor screw movement drive method is a conventional technical means and is not described in detail in this embodiment.

[0041] The sliding table 11 is also provided with a rotatable pressing member 113. The pressing member 113 is located on the side of the positioning groove 112 away from the first mounting plate 6. When the lead 81 and the wire 9 are inserted into the positioning groove 112, the ends of the lead 81 and the wire 9 protrude from the positioning groove 112. At this time, the pressing member 113 is rotated and the ends of the lead 81 and the wire 9 are pressed, thereby making the position of the lead 81 and the wire 9 more stable. The sliding table 11 is provided with a welding receiving platform 114. The welding receiving platform 114 is located between the first mounting plate 6 and the positioning groove 112, and a clearance cut slit 115 is formed between the positioning groove 112 and the welding receiving platform 114. During the welding process of the welding machine 12, since the space of the positioning groove 112 is relatively small, if welding is performed at the position of the positioning groove 112, it is easy for the welding head of the welding machine 12 to interfere with the groove wall of the positioning groove 112. Therefore, the welding receiving platform 114 is provided as the welding position.

[0042] The stress-free temperature sensor back-welding fixture also includes a shearing machine 2. After the welding machine 12 completes the welding of the wire 9 and lead 81, the shearing machine 2 shears off the excess wire 9 and lead 81. The shearing machine 2 uses a vertically rising and falling cutting blade 21 to perform the cutting operation. As the cutting blade 21 cuts, the bottom of the cutting blade 21 slides into the cut slit 115, and then the clamping member 113 releases, allowing the excess wire 9 and lead 81 to automatically fall off. The raising and lowering of the cutting blade 21 is still driven by a motor-driven screw.

[0043] Reference Figure 4 In another embodiment, the excess parts of the wire 9 and the lead 81 can be directly cut using a traditional cutting machine. At this time, the welded first mounting plate 6 and the second mounting plate 7 need to be fixed on the cutting machine, and then the cutting tool can be rotated to cut.

[0044] The stress-free temperature sensor inverted welding tool also includes an argon arc welder 3. After cutting is completed, the first mounting plate 6 and the second mounting plate 7 are placed in the argon arc welder 3. The argon arc welder 3 is provided with a placement table 4. The placement table 4 has a placement groove 45 for the first mounting plate 6 and the second mounting plate 7 to be inserted. The argon arc welder 3 then performs a secondary welding to fix the wire 9 and the lead 81 between the first mounting plate 6 and the second mounting plate 7.

[0045] The placement platform 4 is also equipped with a tilting mechanism 5. Two movable plates 41 are symmetrically arranged on the placement platform 4, and the placement slot 45 is formed by the two movable plates 41. The movable plates 41 are provided with abutment plates 42, which serve as the walls of the placement slot 45. The abutment plates 42 are driven by a pneumatic cylinder, allowing the first mounting plate 6 to slide away from the second mounting plate 7. The tilting mechanism 5 includes a sliding rotating motor 51, a rotating disk 52 mounted at the end of the output shaft of the rotating motor 51, and a rotating shaft 53 mounted on the rotating disk 52. A rotation hole is provided in the side wall of the first mounting plate 6 for inserting the rotating shaft 53. Once the rotating shaft 53 is inserted into the rotation hole, the rotating motor 51 drives the rotating shaft 53 to rotate 180°, thereby causing the first mounting plate 6 to rotate 180° upward, with the axis of the rotating shaft 53 as the rotation centerline. During the tilting process of the first mounting plate 6, the abutment plates 42 move away from the first mounting plate 6, providing space for the first mounting plate 6 to rotate.

[0046] The rotating shaft 53 is a square shaft, and the corresponding rotating hole is a square hole. The placing table 4 is provided with a pushing cylinder 47 for driving the rotating motor 51 to move horizontally, thereby controlling the rotating shaft 53 to be inserted into the first mounting plate 6 or to be pulled out from the first mounting plate 6.

[0047] Reference Figure 1 and Figure 10 When the first mounting plate 6 is flipped, the temperature-sensitive resistor 8 on the first mounting plate 6 is also flipped. At this time, the welding part of the lead 81 and the wire 9 of the temperature-sensitive resistor 8 will form a bending arc 82. That is, after flipping, the temperature-sensitive resistor 8 and the wire 9 are respectively located on both sides of the bending arc 82 (before flipping, the two are located on the same side of the bending arc 82). Because the bending arc 82 itself has a certain elastic deformation space, when the resistor part of the temperature-sensitive resistor 8 is pulled by external force or the material expands and contracts due to heat, the bending arc 82 can form a certain degree of distance buffer, so that the welding part is not easily broken. (The traditional manual spot welding method directly welds the wire 9 and the lead 81, and the bending arc 82 cannot be formed, unless the same-side welding method is also adopted during the spot welding process. After the welding is completed, the temperature-sensitive resistor 8 is manually flipped to the other side of the welding point, so that the temperature-sensitive resistor 8 and the wire 9 are respectively located on both sides of the welding point.)

[0048] The overall width of the first mounting plate 6 is greater than that of the second mounting plate 7 (defined as the extension direction of the wire 9 being the width of the second mounting plate 7). A clearance opening 61 is provided in the portion of the first mounting plate 6 that extends beyond the width of the second mounting plate 7. A flip baffle 62 is slidably embedded within the first mounting plate 6 to fill the clearance opening 61. A control rod 54 is provided on the rotating disk 52 for insertion into the first mounting plate 6. The flip baffle 62 has an inclined wall 621 that is arranged at an angle and abuts against the end of the control rod 54. The entire flip baffle 62 has an isosceles trapezoidal shape. The length of the control rod 54 is greater than that of the rotating shaft 53. As the rotating shaft 53 is inserted into the first mounting plate 6, the control rod 54 also penetrates the first mounting plate 6 and abuts against the inclined wall 621, causing the flip baffle 62 to move upward and gradually cover the clearance opening 61 (equivalent to increasing the width of the first mounting plate 6). Among them, a magnetic attraction device can be set in the first mounting plate 6, so that in a normal state, the flip baffle 62 is adsorbed inside the first mounting plate 6. Only when the control rod 54 is inserted into the first mounting plate 6 and abuts against the inclined wall 621, the flip baffle 62 overcomes the magnetic attraction and slides to the position covering the clearance opening 61.

[0049] The purpose of providing a flip baffle 62 to adjust the width of the first mounting plate 6 is to: if the first mounting plate 6 is always kept relatively narrow, the length of the lead 81 protruding from the first mounting plate 6 will be longer. Since the welding head of the welding machine 12 has a certain volume, the portion of the lead 81 protruding from the first mounting plate 6 is the portion that is welded. The longer the protrusion from the sidewall of the first mounting plate 6, the less likely the welding head of the welding machine 12 will interfere with the sidewall of the first mounting plate 6. In other words, when the width of the first mounting plate 6 is relatively narrow, the welding head is less likely to contact the sidewall of the first mounting plate 6. However, since the lead 81 is tilted with the sidewall of the first mounting plate 6 as the force point, if the portion of the lead 81 protruding from the first mounting plate 6 is too long, the bend 82 of the lead 81 will be longer, making the entire temperature sensor loose and less stable. In other words, the optimal state is that the flip arc only provides a small distance buffer for the entire temperature sensor, with a range of 1-2 mm being optimal, thus providing a certain range of elastic buffer space for thermal expansion and contraction. Therefore, when the flip baffle 62 slides upward, the distance that the lead 81 protrudes from the side wall of the first mounting plate 6 is reduced, thereby reducing the length of the subsequent bending arc 82.

[0050] A material receiving box 43 is provided under the placement table 4. The two movable plates 41 are controlled by a cylinder and can move closer to or away from each other. When the two movable plates 41 move away from each other, the first mounting plate 6 and the second mounting plate 7 fall from the placement groove 45 into the material receiving box 43. Finally, the staff will tear off the tape on the first mounting plate 6 and the second mounting plate 7, and then take out the welded wire 9 and the temperature-sensitive resistor 8. The material receiving box 43 is provided with an inclined slide 44 for buffering.

[0051] Reference Figure 11 and Figure 12 In another embodiment, the placement table 4 is provided with a receiving plate 46 that is slidably mounted at the bottom of the placement groove 45. The receiving plate 46 is the bottom of the placement groove 45 and is used to support the first mounting plate 6 and the second mounting plate 7. A pulling rod 521 is integrally connected to the outer wall of the rotating disk 52, and a pulling groove 461 is provided on the receiving plate 46. When the rotating shaft 53 is inserted into the first mounting plate 6 and drives the first mounting plate 6 to rotate upward by 180°, the pulling rod 521 is synchronously rotated downward by 180° and embedded in the pulling groove 461. Under the action of the pushing cylinder 47, the rotating motor 51 drives the rotating disk 52 away from the first mounting plate 6 and the second mounting plate 7. At this time, the pulling rod 521 drives the receiving plate 46 away from the first mounting plate 6 and the second mounting plate 7. The first mounting plate 6 and the second mounting plate 7 fall off from the placement groove 45 and fall into the receiving box 43. A reset spring 48 is welded and fixed on the placement table 4 , and an end of the reset spring 48 is welded and fixed to the side wall of the receiving plate 46 to push the receiving plate 46 to reset.

[0052] Based on the above temperature sensor inverted soldering tooling, the temperature sensor inverted soldering process is as follows:

[0053] S1: The temperature sensitive resistor 8 is fixedly mounted on the first mounting plate 6, the wire 9 is fixedly mounted on the second mounting plate 7, the lead 81 of the temperature sensitive resistor 8 is embedded in the first mounting groove, and the wire 9 is embedded in the second mounting groove 71.

[0054] S2: The first mounting plate 6 and the second mounting plate 7 are fixedly mounted on the sliding platform 11, and the sliding platform 11 is started, so that the sliding platform 11 moves toward the welding machine 12 and the cutting machine in sequence to perform preliminary welding and fixing and subsequent tail material removal.

[0055] S3: Place the cut first mounting plate 6 and the second mounting plate 7 in the argon arc welding machine 3 for secondary welding and fixing.

[0056] S4: The rotating shaft 53 and the control rod 54 are inserted into the first mounting plate 6, and driven by the rotating motor 51, the first mounting plate 6 is turned upward by 180°.

[0057] S5: Under the pushing action of the cylinder, the two movable plates 41 move away from each other, and the first mounting plate 6 and the second mounting plate 7 fall into the receiving box 43.

[0058] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A stress-free temperature sensor back-welding fixture, characterized by: include: A first mounting plate (6), a second mounting plate (7) and a welding mechanism (1), wherein the first mounting plate (6) is provided with a first mounting groove for embedding a lead wire (81) of a temperature sensitive resistor (8), and the second mounting plate (7) is provided with a second mounting groove (71) for embedding a wire (9), and the welding mechanism (1) comprises a sliding table (11) and a welding machine (12), wherein the first mounting plate (6) and the second mounting plate (7) are used to be mounted on the sliding table (11), and the second mounting plate (7) is located above the first mounting plate (6), and the sliding table (11) is provided with a plurality of positioning grooves (112), and every two positioning grooves ( 112) corresponds to a temperature resistor, each of the positioning grooves (112) is used for embedding a wire (9) and a lead (81) of the temperature sensitive resistor (8), and when the sliding platform (11) moves forward a certain distance, the welding machine (12) spot-welds the wire (9) and the lead (81) of the temperature sensitive resistor (8) once, and a pressing member (113) is provided on the sliding platform (11), and the pressing member (113) is located on the side of the positioning groove (112) away from the first mounting plate (6), and the pressing member (113) is used to press the end of the wire (9) and the lead (81) of the temperature sensitive resistor (8); It also includes a shearing machine (2), and when the welding machine (12) completes the pre-welding of the wire (9) and the temperature-sensitive resistor (8), the sliding table (11) moves to the position of the shearing machine (2), and the sliding table (11) is provided with a welding receiving table (114) for placing the wire (9) and the lead (81) of the temperature-sensitive resistor (8), and the welding receiving table (114) is located between the positioning groove (112) and the first mounting plate (6), and the shearing machine (2) has a movably arranged cutting blade (21), and a clearance cutting seam (115) for the cutting blade (21) to be embedded is provided between the positioning groove (112) and the welding receiving table (114); It also includes an argon arc welding machine (3), the argon arc welding machine (3) having a placement table (4), after the cutting blade (21) completes cutting the wire (9) and the lead (81) of the temperature-sensitive resistor (8), the first mounting plate (6) and the second mounting plate (7) are placed on the placement table (4), and the argon arc welding machine (3) is used to perform secondary welding and fixation on the wire (9) and the lead (81) of the temperature-sensitive resistor (8) on the placement table (4); The placing table (4) is provided with a flipping mechanism (5), the placing table (4) is provided with a placing groove (45) for placing the first mounting plate (6) and the second mounting plate (7), the placing table (4) is movably provided with an abutting plate (42) for surrounding the placing groove (45) and abutting against the side wall of the first mounting plate (6), the flipping mechanism (5) comprises a sliding rotating motor (51), a rotating disk (52) provided at the end of the output shaft of the rotating motor (51), and a rotating shaft (53) provided on the rotating disk (52), the first mounting plate (6) is provided with a rotating hole for inserting the rotating shaft (53), and the rotating shaft (53) is used to drive the first mounting plate (6) to flip upward by 180 degrees.

2. The temperature sensor back-welding fixture according to claim 1, characterized in that: The first mounting plate (6) is provided with a clearance opening (61), and a flip baffle (62) is slidably provided inside the first mounting plate (6) for filling the clearance opening (61). A control rod (54) is provided on the rotating disk (52), and the flip baffle (62) has an inclined wall (621) for abutting against the end of the control rod (54). When the control rod (54) is inserted into the first mounting plate (6) and abuts against the inclined wall (621), the flip baffle (62) moves upward.

3. The temperature sensor back-welding fixture according to claim 1, characterized in that: A material receiving box (43) is provided below the placement table (4). The placement table (4) has two symmetrically arranged movable plates (41). The placement slots (45) are provided on the two movable plates (41). When the two movable plates (41) move away from each other, the first mounting plate (6) and the second mounting plate (7) fall from the placement slots (45) into the material receiving box (43) below.

4. The temperature sensor back-welding fixture according to claim 1, characterized in that: The placing table (4) is provided with a receiving plate (46) which is slidably mounted on the bottom of the placing groove (45); the first mounting plate (6) and the second mounting plate (7) are placed above the receiving plate (46); a pulling rod (521) is provided on the rotating disk (52); a pulling groove (461) is provided on the receiving plate (46); when the first mounting plate (6) is flipped upward by 180°, the end of the pulling rod (521) away from the rotating disk (52) is embedded in the pulling groove (461); the pulling rod (521) is used to pull the receiving plate (46) in a direction away from the first mounting plate (6) and the second mounting plate (7); a return spring (48) is provided on the placing table (4); the end of the return spring (48) is used to abut against the side wall of the receiving plate (46).

5. A process for manufacturing a temperature sensor back-weld soldering fixture, comprising the temperature sensor back-weld soldering fixture according to any one of claims 1 to 4, comprising the following steps: S1: The temperature sensitive resistor (8) is fixedly mounted on the first mounting plate (6), the lead (9) is fixedly mounted on the second mounting plate (7), the lead (81) of the temperature sensitive resistor (8) is embedded in the first mounting groove, and the lead (9) is embedded in the second mounting groove (71); S2: The first mounting plate (6) and the second mounting plate (7) are fixedly mounted on the sliding table (11), and the sliding table (11) is started, so that the sliding table (11) moves toward the welding machine (12) and the shearing machine (2) in sequence, and the welding machine (12) performs welding; S3: placing the cut first mounting plate (6) and the second mounting plate (7) in an argon arc welding machine (3), and performing secondary welding to fix the wire (9) and the lead wire (81); S4: The rotating shaft (53) and the control rod (54) are inserted into the first mounting plate (6), and driven by the rotating motor (51), the first mounting plate (6) is flipped upward 180 °; S5: Take out the first mounting plate (6) and the second mounting plate (7) from the placement groove (45), and then take out the wire (9) and the temperature sensitive resistor (8).

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