Connector assembly inspection machine

Abstract

The application provides a connector assembly detection machine, which comprises a cabinet and a magnetic suspension ring conveying mechanism on the cabinet, the magnetic suspension ring conveying mechanism is provided with a magnetic suspension ring track and a plurality of magnetic suspension conveying carriers, and feeding, false welding detection, normal direction welding point detection, first vertical welding point detection, back direction detection, overturning, positioning, second vertical welding point detection and discharging collection stations are arranged along the track in sequence. The carrier comprises a magnetic suspension conveying seat and a clamping jig, the jig is provided with a carrier seat and two groups of elastic clamping components, and is used for clamping a workpiece. The feeding station is provided with a first jig opening device, which is used for loosening the workpiece so as to feed. The false welding detection mechanism comprises a shell top pressing device and a terminal pushing device, and false welding is detected through the cooperation of an elastic pressing component and a pressure sensor. The welding points and the terminal positions are detected through different direction CCD photographing detection respectively in each detection station. The overturning station is provided with a second jig opening device and an overturning device. The discharging collection mechanism collects good products and defective products according to detection results.

Description

Technical Field

[0001] This invention relates to the field of welding inspection equipment technology, and in particular to a connector assembly inspection machine. Background Technology

[0002] Connector assemblies are indispensable components in electronic devices, and the quality of their terminal solder joints directly determines the reliability of the electrical connection. In actual production, the connector assembly designed in this paper includes an insulating shell and two through-hole terminals, each of which is fixed to the insulating shell by two solder joints at its front end. Due to the small terminal spacing, the location of the solder joints at the root of the terminal, and their frequent obstruction by the shell, solder joint defects (such as cold solder joints, insufficient solder, and missing solder) are difficult to accurately detect through manual visual inspection; in addition, the position and progress of the terminals also need to be checked.

[0003] Traditional inspection methods mainly rely on manual inspection using magnifying glasses or microscopes. This method has the following prominent problems: First, the inspection efficiency is low and cannot adapt to the pace of mass production; second, human eyes are prone to fatigue, resulting in a high rate of missed detections and false detections; third, it is difficult to simultaneously and stably complete multi-angle observation of solder joints, especially when connectors need to be inspected on both sides, as the error is large after flipping and repositioning.

[0004] In the field of automated inspection equipment, existing technologies include inspection devices that utilize linear conveyor belts or rotary worktables. However, these devices typically suffer from the following shortcomings:

[0005] Multi-station integration is difficult, and the inspection angle is not comprehensive: The solder joint inspection of connector components often requires photographic analysis from multiple directions, and mechanical testing of the terminal elasticity and the assembly status of the shell is also required (such as terminal pushing in the detection of cold solder joints). Most existing equipment can only achieve visual inspection in a single direction, and cannot integrate multi-directional inspection and mechanical pushing tests on a single production line. This results in scattered inspection processes, requiring multiple loading and unloading, and increasing secondary positioning errors.

[0006] Low accuracy and unstable pressure control in detecting cold solder joints: A common method for detecting cold solder joints is to press down on the outer casing and push the terminal, determining whether a cold solder joint is present by measuring the elastic displacement or reaction force of the terminal. In existing equipment, the terminal pushing device typically uses a rigid drive, which is prone to damaging the terminal due to overpressure or causing misjudgments due to inconsistent pressure. While some equipment uses spring buffers, it lacks real-time pressure feedback, making it impossible to accurately monitor the force value of each terminal, resulting in poor repeatability.

[0007] The opening and closing control of elastic clamping fixtures is inconvenient: To improve positioning stability during the conveying process, some inspection machines use elastic clamping components (such as spring collets) to fix the workpiece. At the loading and unloading stations, it is necessary to switch the elastic clamping components to the released state. Existing technologies mostly use individual cylinders or levers to operate one by one, which is complex in structure and slow in response. It is difficult to achieve fast and synchronous fixture opening within the compact circular track, affecting loading and unloading efficiency.

[0008] Insufficient positioning accuracy after workpiece flipping: For connector assemblies requiring double-sided inspection, the position and orientation of the workpiece are prone to shift after flipping. Traditional equipment often relies solely on simple mechanical stops for coarse positioning after flipping, which cannot meet the repeatability required for high-precision visual inspection. This results in solder joints deviating from the field of view during secondary imaging, leading to a high inspection failure rate.

[0009] Inadequate material sorting and replenishment functions: After inspection, qualified (OK) and unqualified (NG) products need to be sorted and collected, and replenishment is required for missing materials during carrier packaging. Existing equipment often only performs simple sorting and cannot simultaneously achieve the linkage operation of NG rejection, OK material replenishment to carrier belt gaps, and carrier packaging on a single production line, resulting in low efficiency for subsequent manual replenishment. Summary of the Invention

[0010] The purpose of this invention is to provide a connector assembly testing machine to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] A connector assembly testing machine includes a chassis and components mounted on the chassis:

[0013] A magnetic levitation circular conveying mechanism includes a magnetic levitation circular track and several sets of magnetic levitation conveying vehicles installed on the track. Along the magnetic levitation circular track, the conveying direction of the conveying vehicles consists of, in sequence, a loading station, a weld defect detection station, a weld joint forward detection station, a first weld joint vertical detection station, a backward detection station, a flipping station, a positioning station, a second weld joint vertical detection station, and a material unloading and collection station. Each magnetic levitation conveying vehicle includes a magnetic levitation conveying base and a clamping fixture. The conveyor seat is installed on a magnetic levitation circular track; the clamping fixture includes a carrier and two sets of elastic clamping assemblies; the carrier has two workpiece placement parts; the two sets of elastic clamping assemblies are installed on the carrier and clamp and fix the workpieces to the workpiece placement parts respectively; the elastic clamping assemblies have a clamping state and a releasing state. When there is no external force, the two sets of elastic clamping assemblies are in the clamping state, clamping the workpieces to the workpiece placement parts. Under the action of external force, the two sets of elastic clamping assemblies can be switched to the releasing state to release the clamping of the workpieces;

[0014] The first clamp opening device is installed at the loading station and is used to control the elastic clamping component to switch to the released state; in the loading station, the magnetic levitation conveyor is used to pick up the workpiece.

[0015] A cold solder joint detection mechanism, located at a cold solder joint detection station, includes a housing pressing device and a terminal pushing device. The housing pressing device is located outside a magnetically levitated circular track and includes a first mounting base, a first Y-axis drive device, and a front housing pressing block. The first Y-axis drive device is mounted on the first mounting base and its power output end is connected to the front housing pressing block. The pressing end of the front housing pressing block is provided with a terminal clearance groove group. The terminal pushing device is located inside the magnetically levitated circular track and includes a second mounting base, a second Y-axis drive device, a first movable base, and an elastic pressing assembly. The second Y-axis drive device is mounted on the second mounting base and its power output end is connected to the first movable base. The elastic pressing assembly includes a terminal pressing head, a first spring, and a pressure sensor. The terminal pressing head is slidably connected to the first movable base via a first slide block. The pressure sensor is installed on the rear side of the first slide block. The first spring is installed between the first movable base and the first slide block to press the pressure sensor tightly within the first slide block.

[0016] A solder joint forward inspection mechanism is set up at the solder joint forward inspection station. The mechanism uses a horizontally set first CCD imaging inspection device to take pictures from front to back to inspect whether the solder joint at the front end of the terminal is OK.

[0017] The first vertical solder joint inspection mechanism is set at the first vertical solder joint inspection station. It uses a vertically set second CCD imaging inspection device to take pictures from top to bottom to inspect whether the solder joint at the front end of the terminal is OK.

[0018] A back-facing inspection mechanism is set up at the back-facing inspection station. A third CCD imaging inspection device, which is set horizontally, takes pictures of the terminals from back to front to inspect whether the position of the terminals is OK.

[0019] A flipping mechanism is provided at a flipping station and includes a second clamp opening device and a flipping device. The second clamp opening device is located inside the magnetic levitation circular track and is used to control the elastic clamping component to switch to the released state. The flipping station is used to remove the workpiece from the magnetic levitation conveyor and control the workpiece to flip 180° and return it to the magnetic levitation conveyor.

[0020] A positioning mechanism is provided at a positioning station for positioning the flipped workpiece.

[0021] The second vertical solder joint inspection mechanism is set at the second vertical solder joint inspection station. It uses a vertically set fourth CCD imaging inspection device to take pictures from top to bottom to check whether the solder joint at the front end of the terminal is OK.

[0022] A material collection mechanism is installed at the material collection station to classify and collect materials that are detected as NG or OK.

[0023] Further description of the present invention: two sets of clamping fixtures are arranged on the left and right sides of the magnetic levitation conveyor; a central limiting boss is provided at the center position of the top of the carrier; two workpiece placement parts are formed on the left and right sides of the central limiting boss; the elastic clamping assembly includes a second spring, a second slide and a chuck; the second slide is slidably connected to the carrier; the second spring is installed between the second slide and the carrier to abut against the movement of the second slide toward the workpiece placement part; the second slides of the two sets of elastic clamping assemblies are arranged adjacent to each other on the left and right; the chuck is fixed on the second slide and extends from the upper end of the carrier; the chucks of the two sets of elastic clamping assemblies are respectively located on the outer side of the two workpiece placement parts; the carrier is provided with a through hole; the second slides of the two sets of elastic clamping assemblies are located inside the through hole.

[0024] Further description of the invention: A recess is formed on the side of the second slide of one set of elastic clamping components near the second slide of the other set of elastic clamping components; the loading station has two loading sub-stations, divided into a first loading sub-station and a second loading sub-station; each of the two loading sub-stations has a set of magnetically levitated conveyor carriers; two sets of first clamp opening devices are provided and located at the positions of the two loading sub-stations respectively; the first clamp opening device is located inside the magnetically levitated circular track; the first clamp opening device includes a third mounting base, a third Y-axis driving device, a movable plate, and two push rods; the movable plate is slidably connected to the third mounting base; the third Y-axis driving device is installed between the third mounting base and the movable plate to control the forward and backward movement of the movable plate; the two push rods are distributed left and right and horizontally installed on the front side of the movable plate; the push rods are used to extend into the carrier through the hollow hole and abut against the second slides of the two sets of elastic clamping components, pushing the two second slides outward.

[0025] In a further description of the present invention, the outer shell pressing device further includes a first connecting frame, a first Z-axis driving device, and an outer shell upper pressing block; the first connecting frame is fixed on a first mounting base; the first Z-axis driving device is mounted on the first connecting frame and its power output end is connected to the outer shell upper pressing block, for controlling the outer shell upper pressing block to move downwards and press against the top of the outer shell.

[0026] In a further description of the present invention, the rear end of the first movable seat is provided with a rear limiting block and the front end is provided with a front limiting block; the front side of the rear limiting block is provided with a first mounting hole; the rear end of the first slide is provided with a second mounting hole; the pressure sensor is disposed in the second mounting hole; gaskets are respectively provided on the front and rear sides of the pressure sensor; the first spring is installed between the first mounting hole and the second mounting hole, and the front end of the first spring abuts against the gasket on the rear side of the pressure sensor, pressing the pressure sensor tightly into the second mounting hole.

[0027] In a further description of the present invention, the elastic pressing assembly is provided in four groups and distributed left and right; the front pressing block of the outer shell is provided in two groups and distributed left and right; each front pressing block of the outer shell is provided with two groups of terminal clearance slots; each group of terminal clearance slots includes two terminal clearance slots.

[0028] In a further description of the present invention, the flipping device includes a second Z-axis drive device, a lifting movable frame, a fourth Y-axis drive device, a second movable seat, and a flipping drive assembly; the second Z-axis drive device is mounted on the chassis and its power output end is connected to the lifting movable frame; the fourth Y-axis drive device is mounted on the lifting movable frame and its power output end is connected to the second movable seat; two sets of the flipping drive assembly are provided and are distributed left and right on the second movable seat; the flipping drive assembly includes a flipping drive motor and a material picking head; the flipping drive motor is mounted on the second movable seat and its power output end is connected to the material picking head; the material picking head is provided with two sets of material picking pins distributed left and right.

[0029] In a further description of the present invention, the positioning mechanism includes a front pressing device, a rear pressing device, and an upper pressing device; the front pressing device is disposed on the outside of the magnetic levitation circular track and includes a fourth mounting base, a fifth Y-axis driving device, and a front positioning block; the fifth Y-axis driving device is mounted on the fourth mounting base and its power output end is connected to the front positioning block; the upper pressing device includes a second connecting frame, a third Z-axis driving device, and a lower pressing block; the second connecting frame is mounted on the fourth mounting base; the third Z-axis driving device is mounted on the second connecting frame and its power output end is connected to the lower pressing block; the rear pressing device is disposed on the inside of the magnetic levitation circular track and includes a fifth mounting base, a sixth Y-axis driving device, and a rear positioning block; the sixth Y-axis driving device is installed between the fifth mounting base and the rear positioning block.

[0030] Further description of the present invention: the material collection station has three material collection sub-stations, namely an NG material discharge sub-station, a replenishment sub-station, and a material collection sub-station; the three material collection sub-stations are located in the same straight line direction; a set of magnetic levitation conveyor vehicles is stationed at each of the three material collection sub-stations; the material collection mechanism includes an NG material collection mechanism, a replenishment mechanism, an OK material collection mechanism, a carrier belt-type packaging and collection mechanism, and three sets of third clamp opening devices; the three sets of third clamp opening devices are respectively arranged at the three material collection sub-stations and located inside the magnetic levitation circular track, and are used to control the elastic clamping components to switch to the released state; the NG material collection mechanism is arranged at the NG material discharge sub-station and located outside the magnetic levitation circular track; the replenishment mechanism is arranged at the replenishment sub-station and located outside the magnetic levitation circular track; the OK material collection mechanism is arranged at the material collection sub-station and located outside the magnetic levitation circular track; the carrier belt-type packaging and collection mechanism is arranged laterally at the NG material collection mechanism, the replenishment mechanism, and the OK material collection mechanism. The outer side of the carrier belt; the carrier belt type packaging and collection mechanism includes a carrier belt feeding device, a carrier belt conveyor, a carrier belt pulling device, a material detection device, a cover film feeding device, and a finished product winding device; the carrier belt feeding device is located on the side near the OK unloading mechanism; the finished product winding device is located on the side near the NG unloading mechanism; the carrier belt conveyor is located between the carrier belt feeding device and the finished product winding device; the carrier belt pulling device is used to control the gradual transport of the carrier belt on the carrier belt conveyor; the material detection device is located in front of the OK unloading mechanism and is used to detect whether there is a shortage of material on the carrier belt at that position; the cover film feeding device is located next to the finished product winding device and is used to release the cover film and cover the carrier belt; the NG unloading mechanism is used to remove the NG workpieces from the clamping fixture and collect the dropped material; the OK unloading mechanism is used to remove all the remaining workpieces from the clamping fixture and transport them to the carrier belt; the replenishment mechanism is used to remove the OK workpieces from the clamping fixture and replenish the missing material position in the carrier belt.

[0031] Further description of the present invention: the NG unloading mechanism includes a first mounting frame, a seventh Y-axis drive device, a first X-axis drive device, a sixth mounting base, a first material handling assembly, and an NG material collection funnel; the seventh Y-axis drive device is mounted on the first mounting frame and its power output end is connected to the first X-axis drive device; the sixth mounting base is mounted on the power output end of the first X-axis drive device; four sets of the first material handling assemblies are distributed left and right on the sixth mounting base; four sets of the first material handling assemblies are provided; the first material handling assembly includes a Z-axis cylinder, a connector, a connecting base, a third spring, and a suction head; the Z-axis cylinder is mounted on the sixth mounting base and its power output end is connected to the connector; the bottom of the connector is provided with an inverted T-shaped slot; the connecting... The connecting seat is slidably connected to the sixth mounting seat via a guide rail pair; the upper end of the connecting seat is provided with a T-shaped locking block; the T-shaped locking block extends into the inverted T-shaped locking groove and can move up and down in the inverted T-shaped locking groove; the third spring is installed in the inverted T-shaped locking groove and its two ends respectively abut against the connecting head and the connecting seat; the adsorption head is fixed at the lower end of the connecting seat; the adsorption end positions of the four sets of adsorption heads correspond to the positions of the four workpiece placement parts in the magnetic levitation conveyor; the NG material collection funnel is set on the rear side of the carrier conveyor; the structure of the replenishing mechanism is the same as the structure of the NG unloading mechanism; the OK unloading mechanism includes a second mounting frame, an eighth Y-axis drive device, and two sets of unloading and conveying devices; the eighth Y-axis drive device includes a rotary motor, a drive gear, and a driven gear. The rotating motor is mounted on the second mounting bracket and its power output end is connected to the driving gear. The driven gear is rotatably connected to the second mounting bracket and located in front of the driving gear. The synchronous gear is connected between the driving gear and the driven gear. One set of the material handling device is slidably connected to the second mounting bracket and connected to the left front side of the synchronous gear, and another set of the material handling device is slidably connected to the second mounting bracket and connected to the right rear side of the synchronous gear. The material handling device includes a seventh mounting seat, an eighth mounting seat, two ninth mounting seats, and four sets of second material picking components. The seventh mounting seat is slidably connected to the second mounting bracket and connected to the synchronous gear through a clamping block. The eighth mounting seat is slidably connected to the second mounting bracket and connected to the synchronous gear through a clamping block. The seventh mounting base is dynamically connected to the bottom of the eighth mounting base; the top of the eighth mounting base is equipped with a first guide wheel; the bottom surface of the top plate of the second mounting frame is provided with two first guide grooves; the distance between the two first guide grooves is wide at the middle position and narrow at the front and rear ends; the first guide wheels of the two sets of material handling devices respectively cooperate with the first guide grooves; a guide plate is fixed to the rear side of the second mounting frame; the guide plate is provided with two symmetrical second guide grooves; the second guide grooves are inclined guide grooves that gradually slope outward from front to back; the two ninth mounting bases are slidably connected to the eighth mounting base; the upper end of the ninth mounting base is provided with a second guide wheel; the two ninth mounting bases are respectively connected to the eighth mounting base by a tension spring, and the tension spring is used to pull the ninth mounting bases closer to the inward side;When the ninth mounting seat moves backward, it cooperates with the second guide wheel and the second guide groove, guiding the two ninth mounting seats to open outward through the second guide groove; each of the ninth mounting seats is equipped with two sets of second material picking components; the structure of the second material picking components is the same as that of the first material picking components; the material detection device includes a mounting base plate, a Y-axis cylinder, a sensor mounting plate, and four infrared sensors; the mounting base plate is fixed to the front side of the carrier conveyor; the Y-axis cylinder is mounted on the mounting base plate and its power output end is connected to the sensor mounting plate; the four infrared sensors are distributed left and right with their detection ends facing downward and are mounted on the front end of the sensor mounting plate, respectively used to detect whether there is material in the material trough on the carrier belt.

[0032] The beneficial effects of this invention are as follows:

[0033] (1) Multi-station full-process integration to achieve all-round inspection of solder joints and terminals.

[0034] By sequentially setting up a loading station, a cold solder joint inspection station, a solder joint forward inspection station, a first solder joint vertical inspection station, a backward inspection station, a flipping station, a positioning station, a second solder joint vertical inspection station, and a material unloading and collection station around a magnetic levitation circular track, mechanical testing, multi-angle visual inspection, flipping positioning, and automatic sorting are integrated into a single device. Specifically, the forward solder joint inspection and the first and second vertical solder joint inspections photograph the solder joints from both horizontal and vertical directions, respectively, forming a three-dimensional inspection of the solder joints. The backward inspection station photographs the terminals from back to front, independently assessing the positional accuracy of the terminals and avoiding subsequent assembly problems caused by terminal misalignment. All stations operate in parallel, ensuring comprehensive and efficient inspection.

[0035] (2) The cold weld detection mechanism has accurate force value feedback, which effectively avoids misjudgment and damage.

[0036] The cold solder joint detection mechanism includes a housing pressing device and a terminal pushing device. The terminal pushing device uses an elastic pressing assembly: the terminal pressing head is slidably connected to the first movable seat via a first slide, and a first spring presses the pressure sensor against the rear side of the first slide. When the terminal pressing head contacts and pushes the terminal, the pressure sensor monitors the pushing force value in real time, preventing rigid overpressure from damaging the terminal and accurately determining whether the terminal has a cold solder joint (during the detection process, the pressure sensor cannot reach the set standard value and remain stable when there is a cold solder joint). Compared with traditional structures using fixed stroke or ordinary spring buffers, this solution achieves closed-loop feedback of force value, resulting in good detection repeatability and a low false judgment rate.

[0037] (3) The flexible clamping fixture and the multi-station clamping opening device work together to achieve rapid and synchronous opening and closing.

[0038] The magnetic levitation conveyor employs two sets of elastic clamping components that automatically clamp the workpiece when no external force is applied. Clamping opening devices are installed at each workstation requiring loading / unloading or flipping (such as loading, flipping, and multiple sub-workstations within the unloading / collecting station). Taking the loading station as an example, the first clamping opening device extends through two push rods from the perforated holes in the carrier, pushing the two second sliding blocks outwards, releasing both sets of elastic clamping components at once, allowing for the simultaneous release or loading / unloading of two workpieces. This structure avoids the need for separate drive components for each workpiece, simplifies the spatial layout inside the track, provides rapid response, and precisely matches the stopping position of the magnetic levitation conveyor, improving the loading / unloading cycle time.

[0039] (4) The flipping mechanism works in conjunction with the positioning mechanism to ensure high-precision resetting of double-sided detection.

[0040] The flipping station is equipped with a second clamp opening device and a flipping device. The workpiece is removed from the magnetic levitation transport carrier, flipped 180°, and then returned to the carrier. Since the workpiece's posture may slightly shift after flipping, a dedicated positioning station is subsequently set up. This station uses a front pressing device, a rear pressing device, and an upper pressing device to mechanically position the workpiece in three dimensions, forcibly correcting any positional deviations. This allows the second weld point vertical inspection station to achieve the same photographic accuracy as the first weld point vertical inspection station, avoiding inspection failures due to inaccurate positioning after flipping.

[0041] (5) The material collection mechanism integrates NG rejection, material replenishment and carrier packing to realize automated packaging of finished products.

[0042] The material collection station is equipped with three sub-stations: an NG (Not Found) discharge sub-station, a replenishment sub-station, and a material collection sub-station. The NG discharge mechanism removes unqualified workpieces and places them into a collection funnel; the OK discharge mechanism removes all remaining qualified workpieces and places them on the carrier conveyor; a material detection device is installed at the front of the carrier conveyor to detect whether each slot on the carrier is short of material in real time; the replenishment mechanism takes qualified workpieces from the magnetic levitation conveyor at the replenishment sub-station and precisely replenishes them to the short positions. Subsequently, the cover film feeding device covers the cover film, and the finished product winding device completes the winding. This design achieves a fully automated closed loop from inspection to packaging. In particular, the sequential control of "NG rejection first, OK discharge second, and replenishment last" ensures that all products on the carrier are qualified and avoids rework of the entire roll due to individual material shortages, significantly improving the efficiency of subsequent processes.

[0043] (6) Magnetic levitation ring conveyor and dual workpiece carrier design improve conveying efficiency and inspection throughput.

[0044] The magnetic levitation ring conveyor mechanism enables multiple carriers to operate independently, at high speed, and with low vibration. Each carrier has two workpiece placement sections (symmetrically arranged), allowing each station to process two workpieces simultaneously. Compared to traditional turntables or linear conveyors, this solution achieves higher throughput within the same floor space, with smooth start-up and shutdown, which is beneficial for high-precision visual imaging. Furthermore, the central limiting boss on the carrier and two sets of elastic clamping components ensure independent and stable clamping of the two workpieces during transport, preventing interference.

[0045] In summary, this invention effectively solves the comprehensive technical problems of existing connector assembly testing equipment, such as incomplete detection angles, high false solder joint rate, poor flip positioning, and low material handling efficiency, through reasonable workstation layout, precise force-controlled solder joint detection, multi-angle visual inspection, post-flip positioning, rapid opening and closing of elastic fixtures, and intelligent material feeding and packaging mechanism. It significantly improves the testing quality and production efficiency of connector assemblies. Attached Figure Description

[0046] Figure 1 This is a top view of the overall structure of the present invention;

[0047] Figure 2 This is a structural diagram of the magnetic levitation transport vehicle and the first clamp opening device of the present invention;

[0048] Figure 3 yes Figure 2 A magnified view of part A in the image;

[0049] Figure 4 This is a structural diagram of the two sets of elastic clamping components of the present invention;

[0050] Figure 5 This is a structural diagram of the cold solder joint detection mechanism of the present invention;

[0051] Figure 6 yes Figure 5 A magnified view of part B in the image;

[0052] Figure 7 This is a structural diagram of the front pressure block of the outer shell of the present invention;

[0053] Figure 8 This is a structural diagram of the flipping device of the present invention;

[0054] Figure 9 This is a structural diagram of the positioning mechanism of the present invention;

[0055] Figure 10 This is a structural diagram of the material collection mechanism of the present invention;

[0056] Figure 11 This is a structural diagram of the NG feeding mechanism of the present invention;

[0057] Figure 12This is a structural diagram of the material detection device of the present invention;

[0058] Figure 13 This is a structural diagram of the OK feeding mechanism of the present invention;

[0059] Figure 14 This is a structural diagram of the material handling device of the present invention;

[0060] Figure 15 This is a structural diagram of the material handling device of the present invention from another direction;

[0061] Figure 16 This is a structural diagram of the second mounting bracket of the present invention. Detailed Implementation

[0062] The present invention will be further described below with reference to the accompanying drawings:

[0063] like Figure 1 As shown, a connector assembly testing machine includes a chassis 1 and components mounted on the chassis 1:

[0064] like Figure 1-4 As shown, the magnetic levitation ring conveyor mechanism 2 includes a magnetic levitation ring track 21 and several sets of magnetic levitation conveying vehicles 22 installed on the magnetic levitation ring track 21. The conveying directions of the magnetic levitation conveying vehicles 22 along the magnetic levitation ring track 21 are as follows: loading station, weld defect detection station, weld point forward detection station, first weld point vertical detection station, back detection station, flipping station, positioning station, second weld point vertical detection station, and unloading and collection station. The magnetic levitation ring conveyor mechanism 2 adopts a modular stator and mover structure, which can realize independent high-speed start-stop and precise positioning of multiple sets of magnetic levitation conveying vehicles 22. The stopping repeatability of each station can reach ±0.02mm, providing a stable position reference for subsequent visual inspection and mechanical operation. The magnetic levitation conveyor 22 includes a magnetic levitation conveyor base 221 and a clamping fixture 222. The magnetic levitation conveyor base 221 is mounted on a magnetic levitation circular track 21. The clamping fixture 222 includes a carrier 2221 and two sets of elastic clamping assemblies 2222. The carrier 2221 has two workpiece placement portions 201. The two sets of elastic clamping assemblies 2222 are mounted on the carrier 2221 and clamp and fix the workpieces to the workpiece placement portions 201 respectively. The elastic clamping assemblies 2222 have a clamping state and a releasing state. When there is no external force, the two sets of elastic clamping assemblies 2222 are in the clamping state, clamping the workpieces to the workpiece placement portions 201. Under the action of external force, the two sets of elastic clamping assemblies 2222 can be switched to the releasing state to release the clamping of the workpieces. This self-locking elastic clamping design can keep the workpieces stable during the conveying process without an additional power source, avoiding the impact and energy consumption that pneumatic or electric grippers may cause.

[0065] Two sets of clamping fixtures 222 are arranged on the left and right sides of the magnetic levitation conveyor 22; a central limiting boss 202 is provided at the center of the top of the carrier 2221; two workpiece placement parts 201 are formed on the left and right sides of the central limiting boss 202; the central limiting boss 202 positions one side of each of the two workpieces and prevents the two workpieces from interfering with each other during clamping. The elastic clamping assembly 2222 includes a second spring 203, a second slide 204, and a chuck 205; the second slide 204 is slidably connected to the carrier 2221; the second spring 203 is installed between the second slide 204 and the carrier 2221 to abut against the movement of the second slide 204 toward the workpiece placement part 201; the second slides 204 of the two sets of elastic clamping assemblies 2222 are arranged adjacent to each other; the chuck 205 is fixed on the second slide 204 and Extending from the upper end of the carrier 2221; the chucks 205 of the two sets of elastic clamping components 2222 are respectively located on the outside of the two workpiece placement parts 201; the carrier 2221 is provided with a through hole 206; the second slide 204 of the two sets of elastic clamping components 2222 is located inside the through hole 206. Through the design of the through hole 206, the external push rod 34 can directly act on the second slide 204 to control the elastic clamping component 2222, making the operation more convenient.

[0066] like Figure 2 As shown, the first clamp opening device 3 is installed at the loading station and is used to control the elastic clamping assembly 2222 to switch to the released state; in the loading station, the magnetic levitation conveyor 22 is used to pick up the workpiece.

[0067] One set of elastic clamping components 2222 has a second slide 204 with a recess 2041 formed on the side of the second slide 204 of the other set of elastic clamping components 2222; the recess 2041 provides a stable pushing contact surface for the push rod 34, which facilitates the insertion of the push rod 34 between the two second slides 204 to open the two second slides 204. The loading station has two loading sub-stations, namely the first loading sub-station and the second loading sub-station; each of the two loading sub-stations has a set of magnetic levitation conveyor carriers 22; the first clamp opening device 3 is provided in two sets and is located at the positions of the two loading sub-stations respectively; the first clamp opening device 3 is located inside the magnetic levitation circular track 21; the first clamp opening device 3 includes a third mounting base 31, a third Y-axis drive device 32, a movable plate 33 and two push rods 34; the movable plate 33 is slidably connected to the third mounting base 31; the third Y-axis drive device 32 is installed between the third mounting base 31 and the movable plate 33 and is used to control the forward and backward movement of the movable plate 33; the two push rods 34 are distributed left and right and are horizontally installed in front of the movable plate 33; the push rods 34 are used to extend into the carrier 2221 through the hollow hole 206 and abut against the second slides 204 of the two sets of elastic clamping components 2222, and push the two second slides 204 outward. During operation, the third Y-axis drive device 32 pushes the movable plate 33 forward, and the two push rods 34 simultaneously open the second slides 204 of the two assembly jigs 222, causing the elastic clamping components 2222 of both assembly jigs 222 to switch to the released state. In the previous process, the workpiece was placed into the jig 222 of this design by two sets of loading robots. The loading station of this design is divided into a first loading substation and a second loading substation. In this embodiment, the two workpiece placement parts 201 in one of the assembly jigs 222 of the magnetic levitation conveyor 22 are set as the first workpiece placement part. The first workpiece position and the second workpiece position are respectively the two workpiece placement parts 201 in the other assembly jig 222, which are the third workpiece position and the fourth workpiece position. At the first loading substation, the loading robot places the two workpieces in the first workpiece position and the third workpiece position respectively. At the second loading substation, another loading robot places the two workpieces in the second workpiece position and the fourth workpiece position respectively. This not only avoids the problem of the two workpiece positions in the same assembly jig 222 being too close to each other and difficult to load, but also improves the loading efficiency, thereby improving the overall work efficiency.

[0068] like Figure 5-7As shown, the cold solder joint detection mechanism 4 is set at the cold solder joint detection station and includes a shell pressing device 41 and a terminal pushing device 42. The shell pressing device 41 is set outside the magnetic levitation ring track 21 and includes a first mounting base 411, a first Y-axis driving device 412 and a shell front pressing block 413. The first Y-axis driving device 412 is mounted on the first mounting base 411 and its power output end is connected to the shell front pressing block 413. The pressing end of the shell front pressing block 413 is provided with a terminal clearance groove group 4131. The terminal clearance groove group 4131 is used to accommodate the terminal head and avoid contact with the terminal, so that the shell front pressing block 413 only presses the end face of the shell.

[0069] The terminal pressing device 42 is disposed inside the magnetic levitation ring track 21 and includes a second mounting base 421, a second Y-axis drive device 422, a first movable base 423, and an elastic pressing assembly 424. The second Y-axis drive device 422 is mounted on the second mounting base 421 and its power output end is connected to the first movable base 423. The elastic pressing assembly 424 includes a terminal pressing head 4241, a first spring 4242, and a pressure sensor 4243. The terminal pressing head 4241 passes through the first sliding block 4244. The first movable seat 423 is slidably connected to the second movable seat 423. The pressure sensor 4243 is installed on the rear side of the first slide block 4244. The first spring 4242 is installed between the first movable seat 423 and the first slide block 4244 to press the pressure sensor 4243 into the first slide block 4244. During testing, the front pressing block 413 of the housing first presses the front end of the housing forward, and then the second Y-axis drive device 422 of the terminal pushing device 42 pushes the first movable seat 423 forward, so that the terminal pressing head 4241 contacts and pushes the terminal. Due to the presence of the first spring 4242, the pushing force gradually increases, and the pressure sensor 4243 collects the force value in real time. If the terminal is poorly soldered, the value detected by the pressure sensor 4243 during the testing process cannot reach the set standard value and remain stable. Compared with traditional stroke detection, this solution has higher detection accuracy and will not damage the terminal.

[0070] The first movable seat 423 has a rear limit block 4231 at its rear end and a front limit block 4232 at its front end; the rear limit block 4231 is used to limit the rearward limit position of the first slide block 4244, and the front limit block 4232 is used to limit the forward sliding limit of the first slide block 4244. The rear limiting block 4231 has a first mounting hole on its front side; the rear end of the first slide block 4244 has a second mounting hole 42441; the pressure sensor 4243 is disposed in the second mounting hole 42441; gaskets 42431 are respectively provided on the front and rear sides of the pressure sensor 4243; the first spring 4242 is installed between the first mounting hole and the second mounting hole 42441, and the front end of the first spring 4242 abuts against the gasket 42431 on the rear side of the pressure sensor 4243, pressing the pressure sensor 4243 tightly in the second mounting hole 42441; the pressure is transmitted through the gasket 42431, avoiding direct contact between the spring and the sensor sensitive surface, thus extending the sensor life; the first spring 4242 installed between the first mounting hole and the second mounting hole 42441 plays a buffering role, preventing hard contact from damaging the workpiece.

[0071] The elastic pressing assembly 424 is provided in four groups and distributed left and right; the front pressing block 413 of the outer shell is provided in two groups and distributed left and right; each front pressing block 413 of the outer shell is provided with two groups of terminal clearance slots 4131; each group of terminal clearance slots 4131 includes two terminal clearance slots 41311, and two terminals are welded on each workpiece. The two terminal clearance slots 41311 are used to clear the front end of the two terminals, so that the front pressing block 413 of the outer shell only abuts against the outer shell.

[0072] The outer shell pressing device 41 further includes a first connecting frame 414, a first Z-axis driving device 415, and an outer shell upper pressing block 416. The first connecting frame 414 is fixed on the first mounting base 411. The first Z-axis driving device 415 is mounted on the first connecting frame 414 and its power output end is connected to the outer shell upper pressing block 416. It is used to control the outer shell upper pressing block 416 to move downward and press against the top of the outer shell. When the outer shell front pressing block 413 presses against the front end of the outer shell, the first Z-axis driving device 415 controls the outer shell upper pressing block 416 to descend and press against the top of all the outer shells on the magnetic levitation conveyor 22, thus fixing the workpiece. Then the terminal pushing device 42 works to perform detection, thereby improving the detection accuracy.

[0073] like Figure 1 As shown, the solder joint forward inspection mechanism 5 is set at the solder joint forward inspection station. The first CCD imaging inspection device, which is set horizontally, takes pictures from front to back to inspect whether the solder joints at the front end of the terminal are OK. In this design, there are four solder joints at the front end of the workpiece, which are arranged in a four-corner distribution. If the position and number of solder joints are correct, it is judged as OK; otherwise, it is judged as NG.

[0074] like Figure 1 As shown, the first weld point vertical inspection mechanism 6 is set at the first weld point vertical inspection station. The first weld point vertical inspection mechanism 6 takes pictures from top to bottom using a vertically set second CCD imaging inspection device to check whether the weld point at the front end of the terminal is OK. The first weld point vertical inspection mechanism 6 detects whether the protrusion height of the two weld points at the upper end of the workpiece is correct. If the protrusion height is within the set standard range, it is judged as OK; otherwise, it is judged as NG.

[0075] like Figure 1 As shown, the back-facing inspection mechanism 7 is set at the back-facing inspection station. It uses a horizontally positioned third CCD imaging inspection device to take pictures of the terminals from back to front to check whether the position of the terminals is OK. The back-facing inspection mechanism 7 also checks whether the positions of the two terminals in the workpiece are correct from back to front. If they are correct, it is judged as OK; if they are incorrect, it is judged as NG.

[0076] like Figure 1 and 8 As shown, the flipping mechanism 8 is located at the flipping station and includes a second clamp opening device 81 and a flipping device 82. The second clamp opening device 81 is located inside the magnetic levitation circular track 21 and is used to control the elastic clamping assembly 2222 to switch to the released state. The structure of the second clamp opening device 81 is the same as that of the first clamp opening device 3. The flipping station is used to remove the workpiece from the magnetic levitation conveyor 22 and control the workpiece to flip 180° and return it to the magnetic levitation conveyor 22.

[0077] The flipping device 82 includes a second Z-axis drive device 821, a lifting frame 822, a fourth Y-axis drive device 823, a second movable seat 824, and a flipping drive assembly 825. The second Z-axis drive device 821 is mounted on the housing 1 and its power output end is connected to the lifting frame 822. The fourth Y-axis drive device 823 is mounted on the lifting frame 822 and its power output end is connected to the second movable seat 824. Two sets of flipping drive assemblies 825 are provided and are mounted on the second movable seat 824, arranged left and right. The flipping drive assembly 825 includes a flipping drive motor 8251 and a material picker head 8252. The flipping drive motor 8251 is mounted on the second movable seat 824 and its power output end is connected to the material picker head 8252. The material picker head 8252 has a left... Two sets of pick-up pin groups 82521 are distributed on the right. Each set of pick-up pin groups 82521 includes two pick-up pins. The position of the flip drive assembly 825 is controlled by the second Z-axis drive device 821 and the fourth Y-axis drive device 823, so that the pick-up pin group 82521 is inserted into the two terminal holes of the workpiece. After the second clamping opening device 81 controls the elastic clamping assembly 2222 to switch to the loose state and release the workpiece, the flip drive motor 8251 controls the pick-up head 8252 to rotate 180°, driving the workpiece to flip 180° and then put back into the magnetic levitation conveyor 22. Then the second clamping opening device 81 resets and re-clamps the workpiece. After flipping, the positions of the two workpieces in the same clamping fixture 222 are swapped. The system will record the workpiece change at this position.

[0078] like Figure 9 As shown, the positioning mechanism 9 is set at the positioning station and is used to position the flipped workpiece. Since there may be slight positional deviations when the flipping mechanism 8 puts the workpiece back, directly entering the second weld point vertical inspection station might cause the weld point to deviate from the camera's field of view. Therefore, a dedicated positioning station is set up to perform secondary precise positioning of the workpiece.

[0079] The positioning mechanism 9 includes a front pressing device 91, a rear pressing device 92, and an upper pressing device 93. The front pressing device 91 is located outside the magnetic levitation circular track 21 and includes a fourth mounting base 911, a fifth Y-axis drive device 912, and a front positioning block 913. The fifth Y-axis drive device 912 is mounted on the fourth mounting base 911 and its power output end is connected to the front positioning block 913. The upper pressing device 93 includes a second connecting frame 931, a third Z-axis drive device 932, and a lower pressing block 933. The second connecting frame 931 is mounted on the fourth mounting base 911. The third Z-axis drive device 932 is mounted on the second connecting frame 931. The mounting bracket 931 has its power output end connected to the lower pressure block 933. The rear pressing device 92 is located inside the magnetic levitation ring track 21 and includes a fifth mounting base 921, a sixth Y-axis drive device 922, and a rear positioning block 923. The sixth Y-axis drive device 922 is installed between the fifth mounting base and the rear positioning block 923 and is used to control the back-and-forth movement of the rear positioning block 923. During positioning, the front positioning block 913 and the rear positioning block 923 push the workpiece against the center limiting boss 202 on the carrier 2221 from the front-to-back direction, and the lower pressure block 933 gently presses the top of the workpiece from top to bottom, so that the workpiece is accurately limited in the X, Y, and Z directions. This positioning action will not damage the weld joints, and the repeatability of the positioning is good, meeting the field of view requirements for subsequent vertical inspection.

[0080] like Figure 1 As shown, the second weld point vertical inspection mechanism 10 is set at the second weld point vertical inspection station. The fourth CCD imaging inspection device, which is set vertically, takes pictures from top to bottom to check whether the weld point at the front end of the terminal is OK. Since the workpiece has been rotated 180° after passing through the flipping station, the two weld points that were originally located at the bottom are now facing upwards. Therefore, the second weld point vertical inspection mechanism 10 is used to check whether the protrusion height of the two weld points that are located at the top after flipping (i.e. the two weld points that were originally at the bottom) is qualified.

[0081] like Figure 10-16 As shown, the material collection mechanism 11 is set at the material collection station and is used to classify and collect materials that are detected as NG or OK.

[0082] The material unloading and collection station has three sub-stations: an NG discharge sub-station, a replenishment sub-station, and a material unloading and collection sub-station. These three sub-stations are located in the same straight line. Each of the three sub-stations has a set of magnetically levitated conveyor belts 22. Before entering the material unloading and collection station, the control system marks each workpiece as OK or NG based on the results of each detection station and stores the specific judgment results for the four workpieces on each magnetically levitated conveyor belt 22. The material unloading and collection mechanism 11 includes an NG unloading mechanism 111, a replenishment mechanism 112, an OK unloading mechanism 113, a carrier belt-type packaging and collection mechanism 114, and three sets of third clamp opening devices 115. The three sets of third clamp opening devices 115 are respectively located at the three sub-stations and inside the magnetically levitated circular track 21, used to control the elastic clamping assembly 2222 to switch to the released state. The structure of the third clamp opening device 115 is the same as that of the first clamp opening device 3. The NG unloading mechanism 111 is located at the NG discharge sub-station and... Located outside the magnetic levitation circular track 21; the feeding mechanism 112 is located at the feeding substation and outside the magnetic levitation circular track 21; the OK unloading mechanism 113 is located at the unloading and collection substation and outside the magnetic levitation circular track 21; the carrier belt packaging and collection mechanism 114 is laterally arranged outside the NG unloading mechanism 111, the feeding mechanism 112 and the OK unloading mechanism 113; the carrier belt packaging and collection mechanism 114 includes a carrier belt unloading device 1141, a carrier belt conveyor seat 1142, a carrier belt pulling and conveying device 1143, and a material... The system includes a detection device 1144, a cover film feeding device 1145, and a finished product winding device 1146; the carrier tape unloading device 1141 is located near the OK unloading mechanism 113; the finished product winding device 1146 is located near the NG unloading mechanism 111; the carrier tape conveyor 1142 is located between the carrier tape unloading device 1141 and the finished product winding device 1146; the carrier tape pulling device 1143 is used to control the gradual transport of the carrier tape on the carrier tape conveyor 1142; and the material detection device 1144 is located near the OK unloading mechanism 1143. 3. The front side is used to detect whether there is a shortage of material on the carrier belt at this position; the cover film feeding device 1145 is located next to the finished product winding device 1146 and is used to release the cover film and cover the carrier belt; the NG unloading mechanism 111 is used to take out the NG workpieces detected from the clamping fixture 222 and collect the unloaded material; the OK unloading mechanism 113 is used to take out all the remaining workpieces in the clamping fixture 222 and transfer them to the carrier belt; the replenishing mechanism 112 is used to take out the OK workpieces detected from the clamping fixture 222 and replenish the missing material position in the carrier belt.

[0083] The specific workflow is as follows: First, the magnetic levitation conveyor 22 stops at the NG discharge substation. The third clamp opening device 115 of the NG discharge substation opens the elastic clamping component 2222. The NG unloading mechanism 111, based on the stored NG information, only removes and collects the workpieces marked as NG, while the OK workpieces remain on the magnetic levitation conveyor 22. Then, the magnetic levitation conveyor 22 moves forward to the replenishment substation. The third clamp opening device 115 of the replenishment substation opens the elastic clamping component 2222 again. At this time, if all the workpieces left on the magnetic levitation conveyor 22 are OK workpieces, and if the material detection device 1144 does not detect a shortage of material on the conveyor belt, the replenishment mechanism 112 will not operate. If the material detection device 1144 detects a shortage of material on the conveyor belt, when the material shortage location is transported to the position in front of the replenishment mechanism, the replenishment mechanism 112 will remove an OK workpiece from the magnetic levitation conveyor 22 corresponding to the replenishment substation and replenish the empty material trough of the conveyor belt. Finally, the magnetic levitation conveyor 22 enters the unloading and collection substation. The third clamp opening device 115 opens the elastic clamping assembly 2222, and the OK unloading mechanism 113 removes all remaining OK workpieces from the magnetic levitation conveyor 22 and places them into the empty material slots of the carrier belt on the carrier belt conveyor seat 1142. The carrier belt pulling device 1143 gradually pulls the carrier belt, and the material detection device 1144 detects in real time whether there is material in each slot of the carrier belt. If a shortage of material is detected, it feeds back to the replenishment mechanism 112 for replenishment. If all the material slots on the carrier belt detected by the material detection device 1144 are empty, the carrier belt pulling device 1143 stops pulling the carrier belt for one round and directly enters the next round of unloading by the OK unloading mechanism 113. The cover film feeding device 1145 presses the cover film onto the carrier belt, and the finished product winding device 1146 winds up the sealed carrier belt. The above three-level feeding strategy achieves seamless integration of NG rejection, OK replenishment, and normal feeding, ensuring that all products in the final carrier tape are qualified and there are no missing materials.

[0084] The NG unloading mechanism 111 includes a first mounting frame 1111, a seventh Y-axis drive device 1112, a first X-axis drive device 1113, a sixth mounting base 1114, a first material handling assembly 1115, and an NG material collection funnel 1116. The seventh Y-axis drive device 1112 is mounted on the first mounting frame 1111 and its power output end is connected to the first X-axis drive device 1113. The sixth mounting base 1114 is mounted on the power output end of the first X-axis drive device 1113. Four sets of the first material handling assembly... Parts 1115 are distributed and installed on the sixth mounting base 1114; four sets of the first material handling components 1115 are provided; the first material handling components 1115 include a Z-axis cylinder 11151, a connector 11152, a connecting seat 11153, a third spring 11154, and a suction head 11155; the Z-axis cylinder 11151 is installed on the sixth mounting base 1114 and its power output end is connected to the connector 11152; the bottom of the connector 11152 is provided with an inverted T-shaped groove; the connecting seat 11153... The connecting seat 11153 is slidably connected to the sixth mounting base 1114 via a guide rail pair; the upper end of the connecting seat 11153 is provided with a T-shaped locking block; the T-shaped locking block extends into the inverted T-shaped locking groove and can move up and down in the inverted T-shaped locking groove; the third spring 11154 is installed in the inverted T-shaped locking groove and its two ends respectively abut against the connecting head 11152 and the connecting seat 11153; the adsorption head 11155 is fixed to the lower end of the connecting seat 11153; the adsorption end positions of the four sets of adsorption heads 11155 are aligned with the four working parts in the magnetic levitation conveyor 22. The workpiece placement section 201 is positioned accordingly, so all workpieces can be directly picked up without the need for position adjustment by the magnetic levitation conveyor 22; the NG material collection funnel 1116 is located behind the carrier conveyor seat 1142; during operation, the seventh Y-axis drive device 1112 and the first X-axis drive device 1113 move the sixth mounting seat 1114 above the workpiece to be picked up, the Z-axis cylinder 11151 extends to lower the suction head 11155 to contact the workpiece, and the third spring 11154 provides flexible cushioning to prevent damage to the workpiece. After vacuum suction picks up the workpiece, it is moved above the NG material collection funnel 1116 for release.

[0085] The structure of the feeding mechanism 112 is the same as that of the NG unloading mechanism 111; the only difference is that the adsorption head of the feeding mechanism 112 takes the part from the magnetic levitation conveyor 22 of the feeding substation and moves it to the material shortage trough position of the conveyor belt to place the part.

[0086] The OK unloading mechanism 113 includes a second mounting frame 1131, an eighth Y-axis drive device 1132, and two sets of unloading and conveying devices 1133. The eighth Y-axis drive device 1132 includes a rotary motor 11321, a drive gear 11322, a driven gear 11323, and a synchronous toothed belt 11324. The rotary motor 11321 is mounted on the second mounting frame 1131 and its power output end is connected to the drive gear 11322. The driven gear 11323 is rotatably connected to the second mounting frame 1131 and is located in front of the drive gear 11322. The synchronous toothed belt 11324 is drively connected between the drive gear 11322 and the driven gear 11323. One set of unloading and conveying devices 1133... One set of the material handling device 1133 is slidably connected to the second mounting frame 1131 and connected to the left front side of the synchronous toothed belt 11324. Another set of the material handling device 1133 is slidably connected to the second mounting frame 1131 and connected to the right rear side of the synchronous toothed belt 11324. The material handling device 1133 includes a seventh mounting seat 11331, an eighth mounting seat 11332, two ninth mounting seats 11333, and four sets of second material handling components 11334. The seventh mounting seat 11331 is slidably connected to the second mounting frame 1131 and connected to the synchronous toothed belt 11324 via a clamping block 113311. The eighth mounting seat 11332 is slidably connected to the bottom of the seventh mounting seat 11331. A first guide wheel 113321 is mounted on the top of the mounting base 11332; two first guide grooves 11311 are provided on the bottom surface of the top plate of the second mounting bracket 1131; the distance between the two first guide grooves 11311 is wide at the middle position and narrow at the front and rear ends; the first guide wheels 113321 of the two sets of unloading and conveying devices 1133 respectively cooperate with the first guide grooves 11311; a guide plate 11312 is fixed on the rear side of the second mounting bracket 1131; the guide plate 11312 is provided with two symmetrical second guide grooves 113121; the second guide grooves 113121 are inclined guide grooves that gradually slope outward from front to back; the two ninth mounting bases 11333 are slidably connected to the eighth mounting base 113. 32; The upper end of the ninth mounting base 11333 is provided with a second guide wheel 113331; The two ninth mounting bases 11333 are respectively connected to the eighth mounting base 11332 through a tension spring 113332, the tension spring 113332 is used to pull the ninth mounting base 11333 inward; When the ninth mounting base 11333 moves backward, it cooperates with the second guide groove 113121 through the second guide wheel 113331, and guides the two ninth mounting bases 11333 outward through the second guide groove 113121; Each ninth mounting base 11333 is equipped with two sets of second material picking components 11334; The structure of the second material picking component 11334 is the same as the structure of the first material picking component 1115;The rotary motor 11321 drives the synchronous toothed belt 11324 via the drive gear 11322, causing one set of unloading and conveying devices 1133 to move forward and the other set to move backward. One set is used for picking up materials while the other set is used for unloading, improving efficiency. During the alternating operation of the two sets of unloading and conveying devices, the first guide wheel 113321 moves along the first guide groove 11311. When it reaches the middle position, the ninth mounting seats 11333 of the two sets of unloading and conveying devices 1133 slide outward to separate and avoid interference. When it reaches the two ends, they move inward relative to each other. At this time, one set of unloading and conveying devices 1133 is in the picking-up position, and the other set is in the unloading position. The assembly is in the unloading position, and the second guide wheel 113331 of the rear unloading and conveying device 1133 enters the second guide groove 113121. Guided by the second guide groove 113121, it controls the two ninth mounting seats 11333 to open. At this time, the unloading positions of the four sets of second picking-up components 11334 are adapted to the positions of the four workpiece placement positions in the magnetic levitation conveyor 22. They pick up materials from the magnetic levitation conveyor 22. After picking up the materials, they gradually detach from the second guide groove 113121 during forward movement. The tension spring 113332 pulls the two ninth mounting seats 11333 closer together, so that the positions of the four picked-up workpieces are adapted to the material groove positions of the carrier belt, preparing for unloading.

[0087] The material detection device 1144 includes a mounting base plate 11441, a Y-axis cylinder 11442, a sensor mounting plate 11443, and four infrared sensors 11444. The mounting base plate 11441 is fixed to the front side of the carrier conveyor 1142. The Y-axis cylinder 11442 is mounted on the mounting base plate 11441, and its power output end is connected to the sensor mounting plate 11443. The four infrared sensors 11444 are distributed horizontally and mounted on the front end of the sensor mounting plate 11443 with their detection ends facing downwards. They are used to detect whether there is material in the trough on the carrier belt. During detection, the Y-axis cylinder 11442 pushes the sensor mounting plate 11443 to directly above the carrier belt. The infrared sensors 11444 emit infrared light downwards and receive reflected signals. The reflection intensity is different when there is material and when there is no material, thus determining the location of the material shortage. This information is fed back to the control system, which controls the feeding mechanism 112 to accurately feed material.

[0088] The above description is not intended to limit the scope of the present invention. Any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A connector assembly testing machine, characterized in that: The system includes a chassis and a magnetic levitation circular conveyor mechanism mounted on the chassis. The magnetic levitation circular conveyor mechanism includes a magnetic levitation circular track and several sets of magnetic levitation conveyor carriers mounted on the track. Along the magnetic levitation circular track, the conveying direction of the magnetic levitation conveyor carriers is sequentially: a loading station, a weld defect detection station, a weld joint forward detection station, a first weld joint vertical detection station, a backward detection station, a flipping station, a positioning station, a second weld joint vertical detection station, and a material unloading and collection station. Each magnetic levitation conveyor carrier includes a magnetic levitation conveyor base and a clamping fixture. The magnetic levitation conveyor base is mounted on the magnetic levitation circular track. The clamping fixture includes a carrier and two sets of elastic clamping assemblies. The carrier has two workpiece placement sections. Elastic clamping components are mounted on a carrier to clamp and fix the workpiece to the workpiece placement part. The elastic clamping components have a clamping state and a releasing state. When no external force is applied, both sets of elastic clamping components are in the clamping state, clamping the workpiece to the workpiece placement part. Under external force, the two sets of elastic clamping components can be switched to the releasing state, releasing the clamp on the workpiece. A first clamp opening device is located at the loading station and is used to control the elastic clamping components to switch to the releasing state. At the loading station, the magnetic levitation conveyor is used to receive the workpiece. A weld defect detection mechanism is located at the weld defect detection station and includes a housing pressing device and a terminal pushing device. The housing pressing device is located at the magnetic levitation... The outer side of the circular track includes a first mounting base, a first Y-axis drive device, and a front pressing block for the outer shell; the first Y-axis drive device is mounted on the first mounting base and its power output end is connected to the front pressing block for the outer shell; the pressing end of the front pressing block for the outer shell is provided with a terminal clearance groove group; the terminal pressing device is located on the inner side of the magnetic levitation circular track, including a second mounting base, a second Y-axis drive device, a first movable seat, and an elastic pressing assembly; the second Y-axis drive device is mounted on the second mounting base and its power output end is connected to the first movable seat; the elastic pressing assembly includes a terminal pressing head, a first spring, and a pressure sensor; the terminal pressing head is slidably connected to the first movable seat via a first sliding block; the pressure sensor is mounted on the rear side of the first sliding block; the first Y-axis drive device is mounted on the outer side of the circular track, including a first mounting base, a first Y-axis drive device, a first movable seat, and an elastic pressing assembly; the second Y-axis drive device is mounted on the second mounting base and its power output end is connected to the first movable seat; the pressing end of the first movable seat is provided with a terminal clearance groove group; the terminal pressing device is located on the inner side of the magnetic levitation circular track, including a second mounting base, a second Y-axis drive device, a first movable seat, and an elastic pressing assembly; the second Y-axis drive device is mounted on the second mounting base and its power output end is connected to the first movable seat; the elastic pressing assembly includes a terminal pressing head, a first spring, and a pressure sensor; the terminal pressing head is slidably connected to the first movable seat via a first sliding block; the pressure sensor is mounted on the rear side of the first sliding block; the first Y-axis drive device is mounted on the outer side of the circular track, including a first mounting base, a first Y-axis drive device, a first movable seat, and a first movable seat; the first Y-axis drive device is mounted on the first mounting base and its power output end is connected to the first movable seat; the first Y-axis drive device is mounted on the first mounting base and its power A spring is installed between the first movable seat and the first slide to press the pressure sensor into the first slide; a solder joint forward detection mechanism is set at the solder joint forward detection station, which uses a horizontally set first CCD imaging detection device to take pictures from front to back to detect whether the solder joint at the front end of the terminal is OK; a first solder joint vertical detection mechanism is set at the first solder joint vertical detection station, which uses a vertically set second CCD imaging detection device to take pictures from top to bottom to detect whether the solder joint at the front end of the terminal is OK; a back detection mechanism is set at the back detection station, which uses a horizontally set third CCD imaging detection device to take pictures of the terminal from back to front to detect whether the position of the terminal is OK;A flipping mechanism, located at a flipping station, includes a second clamp opening device and a flipping device. The second clamp opening device is located inside the magnetic levitation circular track and is used to control the elastic clamping component to switch to the released state. The flipping station is used to remove the workpiece from the magnetic levitation transport carrier, control the workpiece to flip 180°, and return it to the magnetic levitation transport carrier. A positioning mechanism, located at a positioning station, is used to position the flipped workpiece. A second weld point vertical detection mechanism, located at a second weld point vertical detection station, uses a vertically positioned fourth CCD imaging detection device to take pictures from top to bottom to detect whether the weld points at the front end of the terminals are OK. A material collection mechanism, located at a material collection station, is used to classify and collect materials that are NG (not good) and OK (good).

2. The connector assembly testing machine according to claim 1, characterized in that: Two sets of clamping fixtures are arranged on the left and right sides of the magnetic levitation conveyor; a central limiting boss is provided at the center of the top of the carrier; two workpiece placement parts are formed on the left and right sides of the central limiting boss; the elastic clamping assembly includes a second spring, a second slide and a chuck; the second slide is slidably connected to the carrier; the second spring is installed between the second slide and the carrier to abut against the movement of the second slide toward the workpiece placement part; the second slides of the two sets of elastic clamping assemblies are arranged adjacent to each other on the left and right; the chuck is fixed on the second slide and extends from the upper end of the carrier; the chucks of the two sets of elastic clamping assemblies are respectively located on the outer side of the two workpiece placement parts; the carrier is provided with a through hole; the second slides of the two sets of elastic clamping assemblies are located inside the through hole.

3. The connector assembly testing machine according to claim 2, characterized in that: One set of elastic clamping components has a recessed portion formed on the side of the second slide of the other set of elastic clamping components; the loading station has two loading sub-stations, divided into a first loading sub-station and a second loading sub-station; each of the two loading sub-stations has a set of magnetic levitation conveyor; two sets of the first clamp opening device are provided and located at the positions of the two loading sub-stations respectively; the first clamp opening device is located inside the magnetic levitation circular track; the first clamp opening device includes a third mounting base, a third Y-axis drive device, a movable plate and two push rods; the movable plate is slidably connected to the third mounting base; the third Y-axis drive device is installed between the third mounting base and the movable plate and is used to control the forward and backward movement of the movable plate; the two push rods are distributed left and right and horizontally installed on the front side of the movable plate; the push rods are used to extend into the carrier through the hollow hole and abut against the second slides of the two sets of elastic clamping components, pushing the two second slides outward.

4. The connector assembly testing machine according to claim 1, characterized in that: The outer shell pressing device further includes a first connecting frame, a first Z-axis driving device, and an outer shell pressing block; the first connecting frame is fixed on a first mounting base; the first Z-axis driving device is mounted on the first connecting frame and its power output end is connected to the outer shell pressing block, used to control the outer shell pressing block to move downwards and press against the top of the outer shell.

5. A connector assembly testing machine according to claim 1, characterized in that: The first movable seat has a rear limit block at its rear end and a front limit block at its front end; the rear limit block has a first mounting hole at its front side; the first slide has a second mounting hole at its rear end; the pressure sensor is disposed in the second mounting hole; gaskets are disposed on the front and rear sides of the pressure sensor respectively; the first spring is installed between the first mounting hole and the second mounting hole, and the front end of the first spring abuts against the gasket on the rear side of the pressure sensor, pressing the pressure sensor tightly into the second mounting hole.

6. A connector assembly testing machine according to claim 1, characterized in that: The elastic top pressing assembly is provided in four groups and distributed on the left and right; the front top pressing block of the outer shell is provided in two groups and distributed on the left and right; each front top pressing block of the outer shell is provided with two groups of terminal clearance slots; each group of terminal clearance slots includes two terminal clearance slots.

7. A connector assembly testing machine according to claim 2, characterized in that: The flipping device includes a second Z-axis drive device, a lifting frame, a fourth Y-axis drive device, a second movable seat, and a flipping drive assembly. The second Z-axis drive device is mounted on the chassis and its power output end is connected to the lifting frame. The fourth Y-axis drive device is mounted on the lifting frame and its power output end is connected to the second movable seat. Two sets of flipping drive assemblies are provided and are mounted on the second movable seat in a left-right distribution. The flipping drive assembly includes a flipping drive motor and a material picking head. The flipping drive motor is mounted on the second movable seat and its power output end is connected to the material picking head. The material picking head is provided with two sets of material picking pins arranged in a left-right distribution.

8. A connector assembly testing machine according to claim 1, characterized in that: The positioning mechanism includes a front pressing device, a rear pressing device, and an upper pressing device. The front pressing device is located on the outside of the magnetic levitation circular track and includes a fourth mounting base, a fifth Y-axis drive device, and a front positioning block. The fifth Y-axis drive device is mounted on the fourth mounting base and its power output end is connected to the front positioning block. The upper pressing device includes a second connecting frame, a third Z-axis drive device, and a lower pressing block. The second connecting frame is mounted on the fourth mounting base. The third Z-axis drive device is mounted on the second connecting frame and its power output end is connected to the lower pressing block. The rear pressing device is located on the inside of the magnetic levitation circular track and includes a fifth mounting base, a sixth Y-axis drive device, and a rear positioning block. The sixth Y-axis drive device is installed between the fifth mounting base and the rear positioning block and is used to control the forward and backward movement of the rear positioning block.

9. A connector assembly testing machine according to claim 2, characterized in that: The material unloading and collection station has three sub-stations: an NG discharge sub-station, a replenishment sub-station, and a material unloading and collection sub-station. These three sub-stations are located in the same straight line. Each of the three sub-stations has a magnetically levitated conveyor. The material unloading and collection mechanism includes an NG unloading mechanism, a replenishment mechanism, an OK unloading mechanism, a carrier-type packaging and collection mechanism, and three sets of third clamp opening devices. The three sets of third clamp opening devices are respectively located at the three sub-stations and inside the magnetically levitated circular track, used to control the elastic clamping components to switch to the released state. The NG unloading mechanism is located at the NG discharge sub-station and outside the magnetically levitated circular track. The replenishment mechanism is located at the replenishment sub-station and outside the magnetically levitated circular track. The OK unloading mechanism is located at the material unloading and collection station and outside the magnetically levitated circular track. The carrier-type packaging and collection mechanism is laterally located outside the NG unloading mechanism, the replenishment mechanism, and the OK unloading mechanism. The carrier belt packaging and collection mechanism includes a carrier belt unloading device, a carrier belt conveyor, a carrier belt pulling and feeding device, a material detection device, a cover film feeding device, and a finished product winding device. The carrier belt unloading device is located on the side near the OK unloading mechanism; the finished product winding device is located on the side near the NG unloading mechanism; the carrier belt conveyor is located between the carrier belt unloading device and the finished product winding device; the carrier belt pulling and feeding device is used to control the gradual transport of the carrier belt on the carrier belt conveyor; the material detection device is located in front of the OK unloading mechanism and is used to detect whether there is a shortage of material on the carrier belt at that position; the cover film feeding device is located next to the finished product winding device and is used to release the cover film and cover the carrier belt; the NG unloading mechanism is used to remove the NG-detected workpieces from the clamping fixture and collect them; the OK unloading mechanism is used to remove all remaining workpieces from the clamping fixture and transfer them to the carrier belt; the replenishment mechanism is used to remove the OK-detected workpieces from the clamping fixture and replenish the missing material positions in the carrier belt.

10. A connector assembly testing machine according to claim 9, characterized in that: The NG unloading mechanism includes a first mounting frame, a seventh Y-axis drive device, a first X-axis drive device, a sixth mounting base, a first material handling assembly, and an NG material collection funnel; the seventh Y-axis drive device is mounted on the first mounting frame and its power output end is connected to the first X-axis drive device. The sixth mounting base is installed on the power output end of the first X-axis drive device; four sets of the first material handling components are distributed and installed on the sixth mounting base; four sets of the first material handling components are provided; the first material handling component includes a Z-axis cylinder, a connector, a connecting seat, a third spring, and a suction head; the Z-axis cylinder is installed on the sixth mounting base and its power output end is connected to the connector; the bottom of the connector is provided with an inverted T-shaped slot; the connecting seat is slidably connected to the sixth mounting base through a guide rail pair; the upper end of the connecting seat is provided with a T-shaped block; the T-shaped block extends into the inverted T-shaped slot and can move up and down in the inverted T-shaped slot; the third spring is installed in the inverted T-shaped slot and its two ends respectively abut against the connector and the connecting seat; the suction head is fixed to the lower end of the connecting seat; four The adsorption end of the adsorption head corresponds to the position of the four workpiece placement parts in the magnetic levitation conveyor; the NG material collection funnel is located on the rear side of the carrier conveyor; the structure of the replenishing mechanism is the same as that of the NG unloading mechanism; the OK unloading mechanism includes a second mounting frame, an eighth Y-axis drive device, and two sets of unloading and conveying devices; the eighth Y-axis drive device includes a rotary motor, a drive gear, a driven gear, and a synchronous toothed belt; the rotary motor is mounted on the second mounting frame and its power output end is connected to the drive gear; the driven gear is rotatably connected to the second mounting frame and located in front of the drive gear; the synchronous toothed belt is connected between the drive gear and the driven gear; one set of the unloading and conveying devices is slidably connected to the second mounting frame and synchronized with the drive gear. The toothed belt is connected to the left front side, and another set of the feeding and conveying devices is slidably connected to the second mounting frame and connected to the right rear side of the synchronous toothed belt; the feeding and conveying device includes a seventh mounting seat, an eighth mounting seat, two ninth mounting seats, and four sets of second picking components; the seventh mounting seat is slidably connected to the second mounting frame and connected to the synchronous toothed belt through a clamping block; the eighth mounting seat is slidably connected to the bottom of the seventh mounting seat; a first guide wheel is installed on the top of the eighth mounting seat; the bottom surface of the top plate of the second mounting frame is provided with two first guide grooves; the distance between the two first guide grooves is wide at the middle position and narrow at the front and rear ends; the first guide wheels of the two sets of feeding and conveying devices respectively cooperate with the first guide grooves; a guide plate is fixed to the rear side of the second mounting frame; The guide plate is provided with two symmetrical second guide grooves; the second guide grooves are inclined guide grooves that gradually slope outward from front to back; the two ninth mounting seats are slidably connected to the eighth mounting seat; the upper end of the ninth mounting seat is provided with a second guide wheel; the two ninth mounting seats are respectively connected to the eighth mounting seat by a tension spring, the tension spring being used to pull the ninth mounting seats closer together; when the ninth mounting seats move backward, they cooperate with the second guide groove through the second guide wheel, guiding the two ninth mounting seats to open outward through the second guide groove; each ninth mounting seat is equipped with two sets of second material picking components; the structure of the second material picking component is the same as that of the first material picking component; the material detection device includes a mounting base plate, a Y-axis cylinder, a sensor mounting plate, and four infrared sensors;The mounting base plate is fixed to the front side of the carrier conveyor seat; the Y-axis cylinder is mounted on the mounting base plate and its power output end is connected to the sensor mounting plate; the four infrared sensors are distributed left and right with their detection ends facing down and are mounted on the front end of the sensor mounting plate, respectively used to detect whether there is material in the trough on the carrier belt.

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