Sensor lead pressure forming and electric resistance welding integrated machining equipment and machining method

Abstract

The sensor lead pressure forming and electric resistance welding integrated machining equipment comprises a lower forming positioning part and an upper pressure electrode part, the lower forming positioning part comprises a lower electrode, an insulation isolation movable clamping mechanism and a lower electrode base, and positioning cavities are formed in the two sides of the lower electrode respectively; two pins of the sensor are arranged in the positioning cavity, two lead wire cores to be machined are in lap joint with the pins of the sensor respectively, the upper pressure electrode component comprises two independent upper electrode plates, the two independent upper electrode plates are arranged on an upper electrode base, the upper electrode base is arranged at the lower end of the pressure sensor, and the lower pressure electrode component is arranged at the lower end of the pressure sensor. And the pressure sensor is connected with the output end of the servo pressure feeding mechanism, electric resistance welding is carried out after the lead wire core and the pin are pressed and formed in place, and the servo pressure feeding mechanism continues to feed downwards to press the sensor pin and the lead wire core during electric resistance welding. Continuous pressing can be conducted in the forming and welding process through one-time positioning, and it is guaranteed that the welding quality is reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic automation equipment, and in particular to a sensor lead pressure forming and resistance welding integrated processing equipment and a processing method. Background Art

[0002] The core production process of thermistors is lead forming and resistance welding. Conventional resistance welding equipment is shown in the welding part of patent publication number CN118635758A, patent name A thermistor welding process and device.

[0003] The existing process needs to be divided into two welding processes to complete the forming and welding of the thermal sensor lead wires when conventional resistance welding equipment is used for processing. During the two welding processes, resistance welding is first used to weld the multi-strand round wire cores in the wire into a lead wire core with a square cross section, and then resistance welding is used to weld the square lead wire core and the pin of the thermal sensor together. This method of using two welding processes requires two devices and different clamps to perform forming positioning and welding positioning respectively. After pressure forming, the sensor pins and lead wire cores will produce certain deformation when the clamps are released, and they need to be re-clamped and re-positioned during welding. Re-positioning is likely to cause the sensor pins and lead wire cores to be not pressed in place, and electrodes are likely to stick together during welding, resulting in poor welding quality, insufficient pull-out force after welding, and high welding defect rate. Moreover, the forming pressure of the existing lead forming equipment is basically the same during the forming process, and the forming pressure cannot be precisely controlled according to the change in cross-sectional shape during the lead forming process. It is best to further improve the quality of lead forming and ensure that subsequent welding is more reliable. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a sensor lead pressure forming and resistance welding integrated processing equipment and processing method, which uses a set of automated mechanisms to continuously press the sensor pins and lead wire cores through one-time positioning, and the pressure can be precisely adjusted during the forming process. During the forming and welding process, the lower electrode and the upper electrode plates are continuously pressed and will not loosen or detach from the pins and lead wire cores, ensuring that the sensor pins and lead wire cores do not loosen or deform after pressing and forming, which facilitates continued resistance welding and ensures reliable welding quality.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A sensor lead pressure forming and resistance welding integrated processing equipment, including a lower forming positioning component and an upper pressure electrode component, the lower forming positioning component includes a lower electrode, an insulating isolation movable clamping mechanism and a lower electrode seat, the lower electrode is arranged on the lower electrode seat, and positioning cavities are respectively arranged on both sides of the lower electrode, two pins of the sensor are placed in the positioning cavity, and two lead wire cores to be processed are respectively overlapped on the pins of the sensor, and the insulating isolation movable clamping mechanism is provided with a left insulating clamping block and a right insulating clamping block, the left insulating clamping block and the right insulating clamping block can be respectively away from or close to the side of the positioning cavity for pressing the sensor pin and the lead wire core during forming and welding, and the upper pressure electrode component includes two independent upper electrode plates, and the two independent upper electrode plates are arranged On the upper electrode seat, a cooling water circulation channel is provided inside the upper electrode seat and is connected to the control of the cooling water circulation device. The upper electrode seat is arranged at the lower end of the pressure sensor, and the pressure sensor is further connected to the output end of the servo pressure feed mechanism. The servo pressure feed mechanism is used to drive the two upper electrode plates to press down the sensor pins and lead wire cores placed in the positioning cavity; the upper electrode seat and the lower electrode seat are respectively connected to the positive and negative poles of the welding power supply through cables, and the pressure sensor is used to detect whether the sensor pins and lead wire cores are pressed and formed in place. After pressing and forming in place, the lower electrode and the upper electrode plate are energized to perform resistance welding on the formed sensor pins and lead wire cores. During resistance welding, the servo pressure feed mechanism continues to feed downward to press the sensor pins and lead wire cores.

[0006] Furthermore, the insulating isolation movable clamping mechanism is provided with a movable clamping manipulator, and the left insulating clamping block and the right insulating clamping block are respectively arranged on the left and right fingers of the movable clamping manipulator.

[0007] Furthermore, it also includes an adjustable movable lifting platform, in which an XY fine-tuning platform and a lifting cylinder are provided, and the insulating isolation movable clamping mechanism and the lower electrode seat are arranged at the output end of the lifting cylinder.

[0008] Furthermore, the pressure sensor is mounted on a lifting slide via a mounting seat, and the lifting slide is connected to an output end of the servo pressure feed mechanism.

[0009] Furthermore, a limiting clamping mechanism is provided on the rear side of the positioning cavity, and the limiting clamping mechanism includes a limiting clamping plate and a guide driving cylinder, and the guide driving cylinder drives the limiting clamping plate to move up and down to assist in clamping the sensor pins and lead wire cores.

[0010] Furthermore, according to the above-mentioned processing method of the sensor lead pressure forming and resistance welding integrated processing equipment, the processing method includes the following steps: S1: The adjustable movable lifting platform drives the insulating isolation movable clamping mechanism and the lower electrode seat to rise, and the external mechanism places the two pins of the sensor in the positioning cavity, and the two lead wire cores to be processed are respectively overlapped on the pins of the sensor, and the left insulating clamping block and the right insulating clamping block can be close to the side of the positioning cavity to press the sensor pins and the lead wire core; S2: The servo pressure feeding mechanism drives the two upper electrode plates to move downward to press the sensor pins and lead wire cores placed in the positioning cavity, and the pressure sensor detects in real time whether the pressure pressing the sensor pins and lead wire cores reaches the set value A; S3: After the pressure sensor detects that the pressure reaches the set value A, the welding power supply outputs welding current to the upper electrode plate and the lower electrode through the upper electrode seat and the lower electrode seat respectively to perform resistance welding on the formed sensor pins and lead wire cores; S4: During the resistance welding process, the servo pressure feeding mechanism continues to feed downward, and the pressure sensor detects in real time whether the pressure reaches the set value B. When the pressure reaches the set value B, the servo pressure feeding mechanism stops feeding; S5: After resistance welding, the cooling water circulation device is started, and the upper electrode holder and the upper electrode plate are cooled by the cooling water circulation channel.

[0011] Furthermore, the limit clamping mechanism first assists in clamping the sensor pins and the lead wire core downwards when the servo pressure feeding mechanism moves downwards, and then releases upwards after welding is completed.

[0012] Furthermore, the movable clamping manipulator, the pressure sensor, the servo pressure feeding mechanism, the lifting cylinder, the guide driving cylinder, the welding power supply and the cooling water circulation device are connected to the automatic control system.

[0013] The present invention has the following beneficial effects: 1. The present invention sets a lower molding positioning component and an upper pressure electrode component. The lower molding positioning component is provided with a lower electrode having a positioning cavity, and the upper pressure electrode component is provided with two independent upper electrode plates. The upper electrode plates are driven by a servo pressure feeding mechanism and can be precisely fed, so that the sensor pins and lead wire cores can be continuously compressed through one-time positioning. The pressure can be precisely adjusted during the molding process. During the molding and welding processes, the lower electrode and the upper electrode plates are continuously compressed and will not loosen or detach from the pins and lead wire cores, ensuring that the sensor pins and lead wire cores do not loosen or deform after compression and molding, which is convenient for continuing resistance welding and ensuring reliable welding quality.

[0014] 2. The left insulating clamping block and the right insulating clamping block are arranged on both sides of the positioning cavity of the lower electrode of the present invention, which can press the sensor pins and the lead wire core during molding and welding, avoid displacement and deformation of the sensor pins and the lead wire core during molding and welding, and ensure reliable welding.

[0015] 3. The upper electrode plate of the present invention is connected to the output end of the servo pressure feed mechanism through the upper electrode seat and the pressure sensor. The pressure sensor can be used to detect the pressure of the sensor pins and lead wire cores during the compacting and welding process in real time. The feed amount and pressure of the servo pressure feed mechanism are precisely controllable to ensure that the compacting and welding processes are controllable. After welding, the product appearance is smoother and more beautiful, the sensor pins and lead wire cores are more tightly integrated, and the pulling force is greater, which can better ensure the welding quality.

[0016] 4. A cooling water circulation channel is arranged inside the upper electrode holder of the present invention, and the cooling water circulation channel is connected to the cooling water circulation device through a pipeline, so that the welding electrode can be cooled in time after resistance welding, and the problem of adhesion between the sensor pin and the lead wire core and the electrode during welding can be effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view schematic diagram of the sensor lead pressure forming and resistance welding integrated processing equipment of the present invention.

[0018] Figure 2 It is a three-dimensional schematic diagram of the sensor lead pressure forming and resistance welding integrated processing equipment of the present invention.

[0019] Figure 3 It is a three-dimensional schematic diagram of the lower forming and positioning component of the present invention.

[0020] Figure 4 It is a three-dimensional schematic diagram of the upper pressure electrode component of the present invention.

[0021] Description of reference numerals: 1. Lower molding positioning component; 11. Lower electrode; 111. Positioning cavity; 12. Insulation isolation movable clamping mechanism; 121. Left insulation clamping block; 122. Right insulation clamping block; 13. Lower electrode holder; 14. Movable clamping manipulator; 2. Upper pressure electrode component; 21. Upper electrode plate; 22. Upper electrode holder; 3. Pressure sensor; 4. Servo pressure feed mechanism; 5. Adjustable movable lifting platform; 51. XY fine-tuning platform; 52. Lifting cylinder; 6. Limit clamping mechanism; 61. Limit pressure plate; 62. Guide drive cylinder; 7. Lifting slide. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: See also Figure 1-4As shown, the sensor lead pressure forming and resistance welding integrated processing equipment includes a lower forming positioning component 1 and an upper pressure electrode component 2, the lower forming positioning component 1 includes a lower electrode 11, an insulating isolation movable clamping mechanism 12 and a lower electrode seat 13, the lower electrode 11 is arranged on the lower electrode seat 13, and positioning cavities 111 are respectively provided on both sides of the lower electrode 11, two pins of the sensor are placed in the positioning cavity 111, and two lead wire cores to be processed are respectively overlapped on the pins of the sensor, the insulating isolation movable clamping mechanism 12 is provided with a left insulating clamping block 121 and a right insulating clamping block 122, and the insulating isolation movable clamping mechanism 12 is provided with an active clamping manipulator 14, the left insulating clamping block 121 and the right insulating clamping block 122 are respectively arranged on the left and right fingers of the active clamping manipulator 14; the left insulating clamping block 121 and the right insulating clamping block 122 can be respectively away from or close to the side of the positioning cavity 111 for pressing the sensor lead during forming and welding. Pins and lead wire cores, the upper pressure electrode component 2 includes two independent upper electrode plates 21, and the two independent upper electrode plates 21 are arranged on the upper electrode seat 22. The upper electrode seat 22 is provided with a cooling water circulation channel inside and is connected to the cooling water circulation device control. The upper electrode seat 22 is arranged at the lower end of the pressure sensor 3, and the pressure sensor 3 is further connected to the output end of the servo pressure feed mechanism 4. The servo pressure feed mechanism 4 is used to drive the two upper electrode plates 21 to press down the sensor pins and lead wire cores placed in the positioning cavity 111; the upper electrode seat 22 and the lower electrode seat 13 are respectively connected to the positive and negative poles of the welding power supply through cables, and the pressure sensor 3 is used to detect whether the sensor pins and lead wire cores are pressed and formed in place. After pressing and forming in place, the lower electrode 11 and the upper electrode plate 21 are energized to perform resistance welding on the formed sensor pins and lead wire cores. During resistance welding, the servo pressure feed mechanism 4 continues to feed downward to press the sensor pins and lead wire cores.

[0023] Furthermore, it also includes an adjustable movable lifting platform 5, in which an XY fine-tuning platform 51 and a lifting cylinder 52 are provided, and the insulating isolation movable clamping mechanism 12 and the lower electrode seat 13 are arranged at the output end of the lifting cylinder 52. The pressure sensor 3 is arranged on the lifting slide 7 through a mounting seat, and the lifting slide 7 includes a lifting plate and a lifting guide rail, and the lifting slide 7 is connected to the output end of the servo pressure feed mechanism 4. A limiting clamping mechanism 6 is provided at the rear side of the positioning cavity 111, and the limiting clamping mechanism 6 includes a limiting clamping plate 61 and a guide drive cylinder 62, and the guide drive cylinder 62 drives the limiting clamping plate 61 to move up and down to assist in clamping the sensor pins and lead wire cores. The movable clamping manipulator 14, the pressure sensor 3, the servo pressure feed mechanism 4, the lifting cylinder 52, the guide drive cylinder 62, the welding power supply and the cooling water circulation device are connected to the automatic control system.

[0024] According to the above-mentioned processing method of the sensor lead pressure forming and resistance welding integrated processing equipment, the following steps are included: S1: The adjustable movable lifting platform 5 drives the insulating isolation movable clamping mechanism 12 and the lower electrode seat 13 to rise, and the external mechanism places the two pins of the sensor in the positioning cavity 111, and the two lead wire cores to be processed are respectively overlapped on the pins of the sensor, and the left insulating clamping block 121 and the right insulating clamping block 122 can be close to the side of the positioning cavity 111 to press the sensor pins and the lead wire core; S2: The servo pressure feeding mechanism 4 drives the two upper electrode plates 21 to move downward to press the sensor pins and lead wire cores placed in the positioning cavity 111, and the pressure sensor 3 detects in real time whether the pressure pressing the sensor pins and lead wire cores reaches the set value A; S3: After the pressure sensor 3 detects that the pressure reaches the set value A, the welding power supply outputs welding current to the upper electrode plate 21 and the lower electrode 11 through the upper electrode holder 22 and the lower electrode holder 13 respectively to perform resistance welding on the formed sensor pins and lead wire cores; S4: During the resistance welding process, the servo pressure feeding mechanism 4 continues to feed downward, and the pressure sensor 3 detects in real time whether the pressure reaches the set value B. When the pressure reaches the set value B, the servo pressure feeding mechanism 4 stops feeding; S5: After resistance welding, the cooling water circulation device is started, and the upper electrode holder 22 and the upper electrode plate 21 are cooled by using the cooling water circulation channel.

[0025] When the servo pressure feeding mechanism 4 moves downward, the limit pressing mechanism 6 first assists in pressing the sensor pins and the lead wire core downward, and then releases upward after welding is completed. The above description is only a specific implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. Sensor lead pressure forming and resistance welding integrated processing equipment, characterized by: The invention comprises a lower molding positioning component (1) and an upper pressure electrode component (2), wherein the lower molding positioning component (1) comprises a lower electrode (11), an insulating isolation movable clamping mechanism (12) and a lower electrode seat (13), wherein the lower electrode (11) is arranged on the lower electrode seat (13), and positioning cavities (111) are respectively arranged on both sides of the lower electrode (11), wherein two pins of a sensor are arranged in the positioning cavities (111), and two lead wire cores to be processed are respectively overlapped on the pins of the sensor, and the insulating isolation movable clamping mechanism (12) is provided with a left insulating clamping block (121) and a right insulating clamping block (122), wherein the left insulating clamping block (121) and the right insulating clamping block (122) can be respectively moved away from or close to the side of the positioning cavity (111) for pressing the sensor pins and the lead wire core during molding and welding, and the upper pressure electrode component (2) comprises two independent upper electrode plates (21), wherein the two independent upper electrode plates (21) are arranged on the upper pressure electrode component (22). ) is arranged on the upper electrode seat (22), the upper electrode seat (22) is provided with a cooling water circulation channel inside and is connected to the control of the cooling water circulation device, the upper electrode seat (22) is arranged at the lower end of the pressure sensor (3), and the pressure sensor (3) is further connected to the output end of the servo pressure feeding mechanism (4), the servo pressure feeding mechanism (4) is used to drive the two upper electrode plates (21) to press down the sensor pins and lead wire cores placed in the positioning cavity (111); the upper electrode seat (22) and the lower electrode seat (13) are respectively connected to the positive and negative electrodes of the welding power supply through cables, the pressure sensor (3) is used to detect whether the sensor pins and lead wire cores are pressed and formed in place, and after pressing and forming in place, the lower electrode (11) and the upper electrode plate (21) are energized to perform resistance welding on the formed sensor pins and lead wire cores, and during resistance welding, the servo pressure feeding mechanism (4) continues to feed downward to press the sensor pins and lead wire cores.

2. The sensor lead wire pressure forming and resistance welding integrated processing equipment according to claim 1, characterized in that: The insulating isolation movable clamping mechanism (12) is provided with a movable clamping manipulator (14), and the left insulating clamping block (121) and the right insulating clamping block (122) are respectively provided on the left and right fingers of the movable clamping manipulator (14).

3. The sensor lead wire pressure forming and resistance welding integrated processing equipment according to claim 2, characterized in that: It also includes an adjustable movable lifting platform (5), wherein the adjustable movable lifting platform (5) is provided with an XY fine-tuning platform (51) and a lifting cylinder (52), and the insulating isolation movable clamping mechanism (12) and the lower electrode seat (13) are arranged at the output end of the lifting cylinder (52).

4. The sensor lead wire pressure forming and resistance welding integrated processing equipment according to claim 1, characterized in that: The pressure sensor (3) is mounted on a lifting slide (7) via a mounting seat, and the lifting slide (7) is connected to an output end of the servo pressure feed mechanism (4).

5. The sensor lead wire pressure forming and resistance welding integrated processing equipment according to claim 1 or 3, characterized in that: A limiting pressing mechanism (6) is provided at the rear side of the positioning cavity (111), the limiting pressing mechanism (6) comprising a limiting pressing plate (61) and a guide drive cylinder (62), the guide drive cylinder (62) driving the limiting pressing plate (61) to move up and down to assist in pressing the sensor pins and lead wire cores.

6. The processing method of the sensor lead wire pressure forming and resistance welding integrated processing equipment according to claim 5, characterized in that: The steps include: S1: The adjustable movable lifting platform (5) drives the insulating isolation movable clamping mechanism (12) and the lower electrode seat (13) to rise, and the external mechanism places the two pins of the sensor in the positioning cavity (111), and the two lead wire cores to be processed are respectively overlapped on the pins of the sensor, and the left insulating clamping block (121) and the right insulating clamping block (122) can be close to the side of the positioning cavity (111) to press the sensor pins and the lead wire core; S2: the servo pressure feeding mechanism (4) drives the two upper electrode plates (21) to move downward to press the sensor pins and lead wire cores placed in the positioning cavity (111), and the pressure sensor (3) detects in real time whether the pressure pressing the sensor pins and lead wire cores reaches a set value A; S3: After the pressure sensor (3) detects that the pressure reaches a set value A, the welding power source outputs welding current to the upper electrode plate (21) and the lower electrode (11) via the upper electrode seat (22) and the lower electrode seat (13) respectively to perform resistance welding on the formed sensor pins and lead wire cores; S4: During the resistance welding process, the servo pressure feeding mechanism (4) continues to feed downward, and the pressure sensor (3) detects in real time whether the pressure reaches the set value B. When the pressure reaches the set value B, the servo pressure feeding mechanism (4) stops feeding; S5: After resistance welding, the cooling water circulation device is started, and the upper electrode holder (22) and the upper electrode plate (21) are cooled using the cooling water circulation channel.

7. The processing method of the sensor lead wire pressure forming and resistance welding integrated processing equipment according to claim 6, characterized in that: The position limiting and pressing mechanism (6) first assists in pressing the sensor pins and the lead wire core downwards when the servo pressure feeding mechanism (4) moves downwards, and then releases upwards after welding is completed.

8. The processing method of the sensor lead wire pressure forming and resistance welding integrated processing equipment according to claim 6, characterized in that: The movable clamping manipulator (14), the pressure sensor (3), the servo pressure feed mechanism (4), the lifting cylinder (52), the guide drive cylinder (62), the welding power source and the cooling water circulation device are connected to the automatic control system.

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