A needle positioning device for a needle insertion machine

Abstract

The utility model discloses a needle positioning device for needle inserting machine, including horizontal positioning slide rail, one end of horizontal positioning slide rail is fixed with horizontal drive machine shell, and the bottom sliding connection of horizontal positioning slide rail has needle installation cylinder. The utility model runs, and machine vision camera moves with the needle product of installation in needle installation cylinder inside real -time, because the relative position between machine vision camera and the needle product of needle installation cylinder inside is fixed, therefore, when machine vision camera passes through high accuracy imaging effect, identifies and feeds back to PLC controller to the reference mark on the PCB board, the deviation of needle product and target position is conveniently calculated to the PLC controller control horizontal horizontal -longitudinal drive mechanism operation to drive needle product to carry out compensation movement, realizes the positioning calibration of the needle position of needle product installed in needle installation cylinder inside, makes the device have integrated real -time positioning correction function.

Description

Technical Field

[0001] This utility model relates to the technical field of needle insertion machine structure, specifically a needle positioning device for a needle insertion machine. Background Technology

[0002] Pin insertion machines are widely used in the electronics manufacturing industry. They are devices used to accurately insert the pins of electronic components onto printed circuit boards or other substrates. In a pin insertion machine, the pin is the core component that directly performs the insertion action, and its positional accuracy and motion control directly determine the insertion quality.

[0003] As disclosed in application number 202323022486.2, a needle positioning and detection structure for a needle insertion machine relates to the field of needle insertion machine technology. This needle positioning and detection structure includes a base, with an alignment plate fixedly installed at the top of the base. Multiple alignment plates are located on one side of the alignment plate. At least two second telescopic rods are fixedly installed at the top of the base, and a connecting sleeve is fixedly installed at the top of each second telescopic rod. This needle positioning and detection structure for a needle insertion machine, as described in this utility model, compresses a spring block inside a first telescopic rod, while a first sliding plate drives a directional sliding rod to align. The internal sliding of the plate allows the end of the directional slide rod to contact the sensor inside the alignment plate. At this time, the indicator light on one side of the alignment plate lights up, indicating whether a pin has been inserted into the current hole position. The different sizes of inserted pins push the first slide plate to slide a different distance, causing the directional slide rod to press the sensor on one side, reflecting whether the pin has been misinserted. However, it still has the problem of not being able to automatically sense and calculate the distance deviation between the pin and the target position in the horizontal and vertical directions. In addition, it is not easy to perform positioning correction processing, which leads to low practicality of the device. Based on this, we propose a new type of pin positioning device for pin insertion machines. Utility Model Content

[0004] The purpose of this invention is to provide a needle positioning device for a needle insertion machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a needle positioning device for a needle insertion machine, comprising a transverse positioning slide rail, a transverse drive housing fixed to one end of the transverse positioning slide rail, a needle mounting cylinder slidably connected to the bottom of the transverse positioning slide rail, a longitudinal positioning slide rail connected above the transverse positioning slide rail, a longitudinal drive housing fixed to one side of the longitudinal positioning slide rail, a sliding arm slidably connected to the bottom of the longitudinal positioning slide rail and fixed to the transverse positioning slide rail, a servo motor, a worm gear, and a worm wheel all mounted on the longitudinal and transverse drive housings, a lead screw fixed to the worm wheel movably connected inside the longitudinal and transverse positioning slide rails, a nut seat fitted on the lead screw, an infrared displacement sensor mounted on the outer wall of the nut seat, a machine vision camera mounted on one side of the needle mounting cylinder, a PLC controller mounted on one side of the longitudinal drive housing, and a pressure sensing plate mounted at the bottom of the needle mounting cylinder.

[0006] Preferably, the worm and the worm wheel form a meshing connection, and the worm and the worm wheel are rotatably connected to the interior of the longitudinal drive housing and the transverse drive housing respectively through bearings.

[0007] Preferably, the servo motors are respectively mounted on the outer walls of the longitudinal drive housing and the transverse drive housing by screws, and the output end of the servo motors is connected to the worm gear.

[0008] Preferably, the inner wall of the nut seat is provided with an internal thread layer, and the outer wall of the lead screw is provided with an external thread layer that matches the internal thread layer.

[0009] Preferably, both the longitudinal positioning slide rail and the transverse positioning slide rail are provided with limiting slide cavities that slide in a slidable manner with the nut seat, thereby improving the smoothness of the nut seat during sliding.

[0010] Preferably, the needle mounting sleeve is internally threaded with a needle insert tube.

[0011] Preferably, a mounting top is fixed on the upper part of the longitudinal drive housing, and screw holes are evenly provided on one side of the mounting top to facilitate the installation of the device on the processing head of the pin insertion machine by screws.

[0012] Preferably, a mounting rod is fixed to the top of the pressure sensing plate, and the mounting rod and the needle mounting sleeve form a snap-fit ​​connection.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) The needle positioning device for the needle insertion machine optimizes its performance by installing a needle mounting cylinder, etc. The machine vision camera moves in real time with the needle product installed inside the needle mounting cylinder. Since the relative position between the machine vision camera and the needle product inside the needle mounting cylinder is fixed, when the machine vision camera identifies the reference mark on the PCB board through high-precision imaging and feeds it back to the PLC controller, it is convenient to automatically calculate the deviation between the needle product and the target position, so that the PLC controller can control the horizontal and vertical drive mechanism to drive the needle product to perform compensating movement, thereby realizing the positioning calibration of the needle position of the needle product installed inside the needle mounting cylinder. At the same time, the pressure sensing plate installed on the needle mounting cylinder can start to contact the PCB board surface and sense the pressure after the needle product inside the needle mounting cylinder is inserted into the hole of the reference mark on the PCB board to a suitable depth. Then, through the pressure sensing mechanism, it is convenient to intelligently sense whether the needle depth has reached the standard value, thereby realizing the positioning of the needle depth, and thus enabling the device to achieve a more comprehensive and accurate positioning protection function. (2) The needle positioning device of the needle insertion machine optimizes its performance by installing a lead screw, etc. The corresponding servo motors on the longitudinal and transverse drive housings are started, and the transmission action formed by the worm gear and worm wheel with self-locking effect drives the lead screw to rotate, which in turn drives the nut seat on the lead screw to move. In addition, the infrared displacement sensor installed on the nut seat emits and receives infrared light, and calculates the displacement change of the nut seat based on the reflection characteristics and propagation time of light. This facilitates the smooth movement and adjustment of the needle product in the horizontal plane. This facilitates the horizontal and longitudinal positioning and movement adjustment, and further facilitates the intelligent displacement compensation movement based on the reference mark on the PCB board and the relative distance between the needle product and the machine vision camera. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a partial sectional view of the transverse drive housing of this utility model. Figure 4 This is a partial cross-sectional view of the transverse positioning slide rail of this utility model. Figure 5 This is a partial cross-sectional view of the needle mounting cylinder of this utility model from below.

[0015] In the diagram: 1. Sliding arm; 2. Longitudinal drive housing; 3. Mounting top; 4. Longitudinal positioning slide rail; 5. PLC controller; 6. Lateral drive housing; 7. Lateral positioning slide rail; 8. Needle mounting sleeve; 9. Servo motor; 10. Worm gear; 11. Worm wheel; 12. Limiting slide cavity; 13. Lead screw; 14. Infrared displacement sensor; 15. Nut seat; 16. Machine vision camera; 17. Needle inner tube; 18. Mounting rod; 19. Pressure sensor plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] Please see Figure 1-5 An embodiment of this utility model is provided: a needle positioning device for a needle insertion machine, including a transverse positioning slide rail 7, a transverse drive housing 6 fixed at one end of the transverse positioning slide rail 7, a needle mounting cylinder 8 slidably connected to the bottom of the transverse positioning slide rail 7, and a longitudinal positioning slide rail 4 connected above the transverse positioning slide rail 7. A longitudinal drive housing 2 is fixed to one side of the longitudinal positioning slide rail 4, and a sliding arm 1 that is fixed to the transverse positioning slide rail 7 is slidably connected to the bottom of the longitudinal positioning slide rail 4. A servo motor 9, a worm gear 10, and a worm wheel 11 are installed on both the longitudinal drive housing 2 and the transverse drive housing 6. Both the longitudinal positioning slide rail 4 and the transverse positioning slide rail 7 are movably connected to a lead screw 13 that is fixed to the worm gear 11. A nut seat 15 is fitted on the lead screw 13, and an infrared displacement sensor 14 is installed on the outer wall of the nut seat 15. In use, the corresponding servo motors 9 on the longitudinal drive housing 2 and the transverse drive housing 6 are started. With the help of the transmission action formed by the worm gear 10 and worm wheel 11 with self-locking effect, the lead screw 13 is driven to rotate. This drives the nut seat 15, which is helically mounted on the lead screw 13, to move. In addition, with the help of the infrared displacement sensor 14 installed on the nut seat 15, the displacement change of the nut seat 15 is calculated based on the reflection characteristics and propagation time of the light by emitting and receiving infrared light. This makes it easier to drive the needle product to move and adjust smoothly in the horizontal plane. A machine vision camera 16 is mounted on one side of the needle mounting cylinder 8, a PLC controller 5 is mounted on one side of the longitudinal drive housing 2, and a pressure sensing plate 19 is mounted on the bottom of the needle mounting cylinder 8. In use, the machine vision camera 16 moves in real time along with the needle product installed inside the needle mounting cylinder 8. Since the relative position between the machine vision camera 16 and the needle product inside the needle mounting cylinder 8 is fixed, when the machine vision camera 16 identifies the reference mark on the PCB board through high-precision imaging and feeds it back to the PLC controller 5, it is convenient to automatically calculate the deviation between the needle product and the target position. This allows the PLC controller 5 to control the horizontal and vertical drive mechanisms to drive the needle product to perform compensating movement, thereby achieving the positioning and calibration of the insertion position of the needle product installed inside the needle mounting cylinder 8. At the same time, the pressure sensing plate 19 installed on the needle mounting cylinder 8 can start to contact the PCB board surface and sense the pressure after the needle product inside the needle mounting cylinder 8 is inserted into the hole of the reference mark on the PCB board to a suitable depth. This pressure sensing mechanism facilitates intelligent sensing of whether the insertion depth has reached the standard value, realizing the positioning of the insertion depth, and thus enabling the device to achieve a more comprehensive and accurate positioning protection function. The worm 10 and the worm wheel 11 are meshed together, and the worm 10 and the worm wheel 11 are rotatably connected to the interior of the longitudinal drive housing 2 and the transverse drive housing 6 respectively through bearings. Servo motor 9 is installed on the outer wall of longitudinal drive housing 2 and transverse drive housing 6 respectively by screws, and the output end of servo motor 9 is connected to worm gear 10. The inner wall of the nut seat 15 is provided with an internal thread layer, and the outer wall of the lead screw 13 is provided with an external thread layer that matches the internal thread layer. Both the longitudinal positioning slide rail 4 and the transverse positioning slide rail 7 are provided with limiting slide cavities 12 that are slidably connected to the nut seat 15, which improves the smoothness of the nut seat 15 when it slides. The needle mounting sleeve 8 is internally threaded with a needle insert tube 17; A mounting top 3 is fixed on the top of the longitudinal drive housing 2. Screw holes are evenly arranged on one side of the mounting top 3 to facilitate the installation of the device on the processing head of the pin insertion machine by screws. A mounting rod 18 is fixed to the top of the pressure sensing plate 19, and the mounting rod 18 and the needle mounting sleeve 8 form a snap-fit ​​connection.

[0018] In this embodiment, when in use: An external power supply is connected. First, the user can spirally connect the needle product to the inside of the needle insertion tube 17 on the needle mounting cylinder 8. Then, the top of the device is assembled onto the processing head of the needle insertion machine using the mounting base 3 and screws. During actual operation, the machine vision camera 16 moves in real time along with the needle product installed inside the needle mounting cylinder 8. Since the relative position between the machine vision camera 16 and the needle product inside the needle mounting cylinder 8 is fixed, when the machine vision camera 16 identifies the reference mark on the PCB board through high-precision imaging and feeds it back to the PLC controller 5, it facilitates automatic calculation of the deviation between the needle product and the target position. This allows the PLC controller 5 to control the horizontal and vertical drive mechanisms to drive the needle product in compensating motion, achieving positioning and calibration of the needle insertion position of the needle product installed inside the needle mounting cylinder 8. Simultaneously, the pressure sensing plate 19 installed on the needle mounting cylinder 8 can be used to adjust the position of the needle product when it is inserted into the PCB board. After the appropriate depth of the hole in the reference mark is reached, it begins to contact the PCB board surface and senses the pressure thereon. This pressure sensing mechanism then intelligently senses whether the pin depth has reached the standard value, achieving pin depth positioning. This enables the device to achieve more comprehensive and accurate positioning protection functions. Simultaneously, the corresponding servo motors 9 on the longitudinal drive housing 2 and the transverse drive housing 6 are activated. With the transmission action formed by the worm gear 10 and worm wheel 11 with self-locking effect, the lead screw 13 rotates, which in turn moves the nut seat 15, which is helically mounted on the lead screw 13. In conjunction with the infrared displacement sensor 14 installed on the nut seat 15, the displacement change of the nut seat 15 is calculated based on the reflection characteristics and propagation time of the light by emitting and receiving infrared light. This facilitates the smooth movement and adjustment of the needle product in the horizontal plane. This facilitates horizontal and longitudinal positioning and movement adjustment, and further facilitates intelligent displacement compensation movement based on the relative distance between the reference mark on the PCB board and the needle product calculated by the machine vision camera 16.

Claims

1. A needle positioning device for a needle insertion machine, characterized in that, The system includes a transverse positioning slide rail (7), one end of which is fixed to a transverse drive housing (6). A needle mounting cylinder (8) is slidably connected to the bottom of the transverse positioning slide rail (7). A longitudinal positioning slide rail (4) is connected above the transverse positioning slide rail (7). A longitudinal drive housing (2) is fixed to one side of the longitudinal positioning slide rail (4). A sliding arm (1) fixed to the transverse positioning slide rail (7) is slidably connected to the bottom of the longitudinal positioning slide rail (4). Servo motors (9) are installed on both the longitudinal drive housing (2) and the transverse drive housing (6). The longitudinal positioning slide rail (4) and the transverse positioning slide rail (7) are movably connected to the lead screw (13) fixed to the worm wheel (11). The lead screw (13) is fitted with a nut seat (15). An infrared displacement sensor (14) is installed on the outer wall of the nut seat (15). A machine vision camera (16) is installed on one side of the needle mounting cylinder (8). A PLC controller (5) is installed on one side of the longitudinal drive housing (2). A pressure sensing plate (19) is installed at the bottom of the needle mounting cylinder (8).

2. The needle positioning device for a needle insertion machine according to claim 1, characterized in that: The worm (10) and worm wheel (11) are meshed together, and the worm (10) and worm wheel (11) are rotatably connected to the interior of the longitudinal drive housing (2) and the transverse drive housing (6) respectively through bearings.

3. The needle positioning device for a needle insertion machine according to claim 1, characterized in that: The servo motor (9) is installed on the outer wall of the longitudinal drive housing (2) and the transverse drive housing (6) by screws, and the output end of the servo motor (9) is connected to the worm gear (10).

4. The needle positioning device for a needle insertion machine according to claim 1, characterized in that: The inner wall of the nut seat (15) is provided with an internal thread layer, and the outer wall of the lead screw (13) is provided with an external thread layer that matches the internal thread layer.

5. The needle positioning device for a needle insertion machine according to claim 1, characterized in that: Both the longitudinal positioning slide rail (4) and the transverse positioning slide rail (7) are provided with limiting slide cavities (12) that are slidably connected to the nut seat (15).

6. The needle positioning device for a needle insertion machine according to claim 1, characterized in that: The needle mounting sleeve (8) is internally threaded with a needle insert tube (17).

7. The needle positioning device for a needle insertion machine according to claim 1, characterized in that: A mounting base (3) is fixed on the top of the longitudinal drive housing (2), and screw holes are evenly arranged on one side of the mounting base (3).

8. The needle positioning device for a needle insertion machine according to claim 1, characterized in that: The pressure sensing plate (19) is fixed with a mounting rod (18) at the top, and the mounting rod (18) and the needle mounting cylinder (8) are connected by a snap-fit ​​connection.

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