CN-122007531-A - Tooling and process for welding sensor chip pin header and circuit board

CN122007531ACN 122007531 ACN122007531 ACN 122007531ACN-122007531-A

Abstract

A fixture and a process for welding a sensor chip pin header and a circuit board relate to the technical field of sensor processing and are used for facilitating the installation and positioning of the sensor chip and the circuit board and improving the assembly efficiency and the yield. The fixture for welding the sensor chip pin header and the circuit board is used for welding and positioning and fixing the sensor chip, the pin header and the circuit board, the sensor chip comprises a chip main body and a plurality of pins, the pins extend outwards along the side wall of the chip main body and are distributed in parallel, pin holes used for penetrating the pins and pin holes used for penetrating the pin header are distributed on the circuit board at intervals, and the pin holes penetrate through the circuit board in the thickness direction of the circuit board. The welding tool for the sensor chip pin header and the circuit board comprises a chip mounting plate, a welding cover plate, a sliding limiting plate and a locking piece. The chip mounting board is provided with a plurality of working grooves for mounting the circuit board on one side of the board surface in parallel at intervals, and the circuit board can be placed in the working grooves.

Inventors

LIU HUAN
Qian Zhenqiang
Ke Changtang
CAO JINGYU
KE BINBIN
LIU GANG

Assignees

武汉盛势启创科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. The fixture for welding the sensor chip pin header and the circuit board is characterized by being used for welding, positioning and fixing the sensor chip, the pin header and the circuit board, wherein the sensor chip comprises a chip main body and a plurality of pins, the pins extend outwards along the side wall of the chip main body and are distributed in parallel, pin holes for penetrating the pins and pin holes for penetrating the pin header are distributed on the circuit board at intervals, and the pin holes penetrate through the circuit board along the thickness direction of the circuit board; the welding fixture for the sensor chip pin header and the circuit board comprises: the chip mounting plate is provided with a plurality of working grooves which are parallel to one side plate surface and are used for mounting a circuit board at intervals, the circuit board can be placed in the working grooves, chip grooves and pin arrangement grooves are formed in the chip mounting plate at positions corresponding to the pin arrangement holes and the pin arrangement holes, the sensor chip can be placed in the chip grooves and enables the pin to penetrate through the pin arrangement holes of the circuit board, and the pin arrangement can be placed in the pin arrangement grooves and enables the pin arrangement to penetrate through the pin arrangement holes of the circuit board; The welding cover plate is covered on the chip mounting plate, two independent welding cavities are arranged on the welding cover plate, the sensor chip and the pin header are projected into the welding cavities along the distribution direction of the welding cover plate and the chip mounting plate, and the circuit board is partially abutted on the welding cover plate; The sliding limiting plate is arranged in the sliding sinking groove at the opening of the chip groove in a sliding manner, the sliding limiting plate can slide from a first position to a second position, a limiting hole is formed in the sliding limiting plate, the contact pin penetrates through the limiting hole, the sliding limiting plate can be abutted to the chip main body when sliding to the first position, and the sensor chip can be released when sliding to the second position, so that the sensor chip can enter and exit the chip groove through the limiting hole; The locking piece is fixedly arranged on the chip mounting plate and is in transmission connection with the sliding limiting plate, the sliding limiting plate can be pushed and pulled to move between a first position and a second position, and the sliding limiting plate can be kept at the first position or kept at the second position.
2. The fixture for welding the sensor chip pin header and the circuit board according to claim 1, wherein the fixture comprises a plurality of pins, The locking piece comprises a driving part and a driven part, the driven part is a transmission plate, one end of the transmission plate is fixedly connected with the end part of the sliding limiting plate, a matching sliding chute is arranged on the transmission plate, an opening of the matching sliding chute is perpendicular to the sliding direction of the sliding limiting plate and the opening direction of the chip slot, and the matching sliding chute extends along the opening direction of the chip slot; The driving part comprises a rotating shaft and a pressing rod, the middle part of the pressing rod is rotationally connected to the rotating shaft, the rotating shaft is arranged on one side of the transmission plate, which is far away from the sliding limiting plate, the rotating shaft and the chip mounting plate are relatively fixedly arranged, the axis of the rotating shaft is parallel to the opening direction of the matching sliding chute, one side of the pressing rod, which is close to the sliding limiting plate, extends to form a matching shaft, one end of the matching shaft extends into the matching sliding chute, The one end that the depression bar kept away from the slip limiting plate is the free end, the free end of depression bar can reciprocate, drives the cooperation axle is in slide in the cooperation spout, make simultaneously the cooperation axle drives the drive plate slides, and drives the slip limiting plate is in first position with slide between the second position.
3. The fixture for welding the sensor chip pin header and the circuit board according to claim 2, wherein the fixture comprises a plurality of pins, The pressure bar comprises a first part and a second part, the pressure bar of the sliding limiting plate is far away from the rotating shaft and is arranged at the first part, the pressure bar between the rotating shaft and the sliding limiting plate is arranged at the second part, the weight of the first part is larger than that of the second part, so that when the chip mounting plate is horizontally placed and the bottom is suspended, namely, when the pressure bar is in a natural state, the first part of the pressure bar is lower than the second part, and at the moment, the sliding limiting plate is arranged at the first position, and the sliding limiting plate is abutted against the sensor chip.
4. The fixture for welding the sensor chip pin header and the circuit board according to claim 3, The first part of the area of the pressure lever penetrates through the bottom wall of the chip mounting plate in the opposite direction of the opening direction of the chip, and when the pressure lever is in a natural state, the first part of the pressure lever is lower than the bottom surface of the chip mounting plate, namely, the pressure lever part is positioned outside the chip mounting plate; When the bottom of the chip mounting plate is abutted against a surface, the surface can push the first part of the compression bar to rotate upwards, and the sliding limiting plate moves from the first position to the second position.
5. The tooling for welding the sensor chip pin header and the circuit board according to any one of claims 1 to 4, wherein, The limiting holes of the sliding limiting plate comprise first through holes and second through holes, the contact pins are distributed at intervals along the same direction, the width of the chip main body is larger than the common width of the areas where the contact pins are located along the arrangement direction of the contact pins, the first through holes and the second through holes are distributed and communicated along the distribution direction of the first position and the second position, The width of the first through hole is smaller than the width of the second through hole along the arrangement direction of the plurality of pins, the width of the first through hole is larger than the common width of the areas where the plurality of pins are located and smaller than the width of the chip main body, and the width of the second through hole is larger than the width of the chip main body; Along the opening direction of the chip groove, when the sliding limiting plate is positioned at a first position, the sensor chip is partially projected in the first through hole, and when the sliding limiting plate is positioned at a second position, the sensor chip is completely projected in the second through hole.
6. The fixture for welding the sensor chip pin header and the circuit board according to claim 5, wherein, Along the direction of arranging of many the contact pin, two that lie in both sides the contact pin outwards extends respectively and forms the butt post, when sliding limiting plate is located the first position, sliding limiting plate's diapire butt in the butt post.
7. A process for welding a sensor chip pin header and a circuit board, which is characterized by being applied to the tooling for welding the sensor chip pin header and the circuit board according to claims 1-6, wherein the process for welding the sensor chip pin header and the circuit board comprises the following steps: s1, cutting an original chip to form the sensor chip, and placing the sensor chip into a vibration disc to enable the sensor chip to be arranged in a specified mode; S2, placing the chip mounting plate on a corresponding workbench surface, jacking a compression bar at the bottom of the chip mounting plate by the workbench surface, enabling the sliding limiting plate to slide to a second position, enabling the workbench surface and the chip mounting plate to slide to a designated working position through a first servo screw rod assembly, enabling the workbench surface and the chip mounting plate to reach the lower part of the vibration plate, and fixing the position of the chip mounting plate; S3, clamping the sensor chip on the vibration disc through a finger cylinder and a second servo screw rod assembly, and moving the sensor chip to the position right above the chip groove; s4, lifting the chip mounting plate to the position below the sensor chip through a servo screw rod lifting assembly, so that the distance between the sensor chip and an opening of the chip groove is 0.5 mm-1.7 mm; s5, loosening the finger cylinder to enable the sensor chip to fall into the chip groove; S6, repeating the steps S3, S4 and S5, so that a plurality of sensor chips are respectively placed in independent chip grooves by a second servo screw rod and the finger cylinder, and one sensor chip is placed in each chip groove; S7, descending the position of the chip mounting plate through a servo screw rod lifting assembly, and sliding the chip mounting plate to a direction away from the first servo screw rod assembly through a first servo screw rod assembly so as to enable the chip mounting plate to move back to an initial position; s8, arranging pins in each pin arranging groove; s9, installing a circuit board in each working groove, enabling pins on the sensor chip to pass through pin holes on the circuit board, and enabling the pin bars to pass through pin bars on the circuit board; S10, a welding cover plate is covered, so that the positioning and the installation of the welding tool for the sensor chip pin bars and the circuit board are completed, the welding tool for the sensor chip pin bars and the circuit board is taken down from the workbench surface, the first part of the compression bar naturally falls down, the sliding limiting plate automatically slides to a first position, the sensor chip in the sliding limiting plate is limited, the welding tool for the sensor chip pin bars and the circuit board is conveniently turned, and the circuit board, the contact pins, the circuit board and the pin bars are respectively welded in the welding cavity.
8. The tooling and the process for welding the sensor chip pin header and the circuit board according to claim 7 are characterized in that, The first servo screw rod assembly and the second servo screw rod assembly are mutually perpendicular in screw rod direction, and a plurality of working grooves are distributed at intervals along the screw rod direction of the second servo screw rod assembly.
9. The tooling and the process for welding the sensor chip pin header and the circuit board according to claim 7 are characterized in that, S8, S9 and S10 are all completed manually.
10. The fixture for welding the sensor chip pin header and the circuit board is characterized in that the fixture is used for welding, positioning and fixing the sensor chip, the pin header and the circuit board, the sensor chip comprises a chip main body and a plurality of pins, the pins extend outwards along the lateral direction of the chip main body and are distributed in parallel, two sensor chips and one pin header are correspondingly arranged on one circuit board, the pin header and the two sensor chips are distributed at intervals along the length direction of the circuit board, the pin header is arranged at one end of the circuit board, the main bodies of the two sensor chips are positioned at the same side of the circuit board, and the interval between the two circuit boards is larger than half of the length of the circuit board; the circuit board is provided with pin holes and pin row holes for penetrating through the pins and the pin row, and the pin holes and the pin row holes penetrate through the circuit board in the thickness direction of the circuit board; the welding fixture for the sensor chip pin header and the circuit board comprises: The chip mounting plate is provided with a plurality of working grooves which are parallel to each other and are used for mounting a circuit board at intervals on the upper side plate surface, the circuit board can be placed in the working grooves, chip grooves and pin arrangement grooves are formed in the positions, corresponding to the pin arrangement holes and the pin arrangement holes, of the chip mounting plate, the sensor chip can be placed in the chip grooves and enables the pins to penetrate through the pin arrangement holes of the circuit board, and the pin arrangement can be placed in the pin arrangement grooves and enables the pin arrangement to penetrate through the pin arrangement holes of the circuit board; The welding cover plate is covered on the chip mounting plate, two independent welding cavities are arranged on the welding cover plate, two sensor chips and the row pins are projected in the welding cavities along the distribution direction of the welding cover plate and the chip mounting plate, the two sensor chips are projected in different welding cavities, and the circuit board is partially abutted to the welding cover plate; The sliding limiting plates are arranged in the sliding sinking grooves at the opening parts of the chip grooves in a sliding mode, the sliding limiting plates can slide from a first position to a second position, limiting holes are formed in the sliding limiting plates, the pins penetrate through the limiting holes, the sliding limiting plates can be abutted to the chip main body when sliding to the first position, and the sensor chips can be released when sliding to the second position, so that the sensor chips can pass through the limiting holes to enter and exit the chip grooves; the locking pieces are fixedly arranged on the chip mounting plate, one locking piece is in transmission connection with at least one sliding limiting plate, the locking pieces can push and pull the sliding limiting plate to move between a first position and a second position, and the sliding limiting plate can be kept at the first position or kept at the second position.

Description

Tooling and process for welding sensor chip pin header and circuit board Technical Field The application relates to the technical field of sensor processing, in particular to a fixture and a process for welding a sensor chip pin header and a circuit board. Background In the prior art, the electric vortex sensor is formed by welding a PCB (circuit board) with a chip, a chip sheath and a pin header through wave soldering. The chip is small in size and inconvenient to install manually, the chip is installed in the chip sheath, the chip sheath is in interference fit with the PCB, the chip sheath needs to be pre-assembled manually to the PCB during installation of the chip sheath, the equipment is used for press fitting in place, the long-time and large-number manual pre-assembling of the chip sheath not only causes the pain of fingers of workers, the whole time consumption of manual pre-assembling and equipment press fitting is more, the press fitting is also likely to cause the deformation of the PCB, and the yield is reduced. Disclosure of Invention The application provides a fixture and a process for welding a sensor chip pin header and a circuit board, which are used for facilitating the installation and positioning of the sensor chip and the circuit board and improving the assembly efficiency and the yield. The application provides a fixture and a process for welding a sensor chip pin header and a circuit board, which are used for welding, positioning and fixing the sensor chip, the pin header and the circuit board, wherein the sensor chip comprises a chip main body and a plurality of pins, the contact pins extend outwards along the side wall of the chip main body, the contact pins are distributed in parallel, contact pin holes for penetrating the contact pins and pin row holes for penetrating the pin row are distributed on the circuit board at intervals, and the contact pin holes and the pin row holes are all communicated with the circuit board along the thickness direction of the circuit board. The welding tool for the sensor chip pin header and the circuit board comprises a chip mounting plate, a welding cover plate, a sliding limiting plate and a locking piece. The chip mounting board, parallel and interval are provided with a plurality of work grooves that are used for installing the circuit board on one side face, and the circuit board can be placed in the work groove, and chip mounting board corresponds contact pin hole and arranges needle hole department and is provided with chip groove and row needle groove, and the sensor chip can be placed in the chip groove and makes the contact pin link up the contact pin hole of circuit board, arranges the needle can be placed in row needle groove and makes row needle link up the row needle hole of circuit board. The welding cover plate is covered on the chip mounting plate, two independent welding cavities are arranged on the welding cover plate, the sensor chip and the pin header are projected into the welding cavities along the distribution direction of the welding cover plate and the chip mounting plate, and the circuit board is partially abutted on the welding cover plate. The sliding limiting plate is arranged in the sliding sinking groove at the opening of the chip groove in a sliding manner, the sliding limiting plate can slide from a first position to a second position, a limiting hole is formed in the sliding limiting plate, the contact pin penetrates through the limiting hole, the sliding limiting plate can be abutted to the chip main body when sliding to the first position, and the sensor chip can be released when sliding to the second position, so that the sensor chip can enter and exit the chip groove through the limiting hole. The locking piece is fixedly arranged on the chip mounting plate and is in transmission connection with the sliding limiting plate, the sliding limiting plate can be pushed and pulled to move between a first position and a second position, and the sliding limiting plate can be kept at the first position or kept at the second position. Firstly, this scheme holds and assembles the sensor chip through the frock, avoids using the chip sheath, has reduced production process and pressure equipment technology, saves cost of labor and technology cost, need not the pressure equipment of chip sheath and still can avoid causing the deformation of circuit board to improve the yields. Secondly, through work groove, chip groove, row needle groove on the chip mounting panel, can realize the accurate positioning of sensor chip, row needle, circuit board three, guarantee contact pin and contact pin hole, row needle and row needle hole counterpoint accuracy, avoid welding off normal, rosin joint, short circuit. The welding cover plate is provided with two independent welding cavities, so that the chip contact pins and the pin headers can be welded respectively, the solder crosstalk is prevented, the mutual interference of different welding