Automatic needle alignment assembly and centering correction device for micro-diameter hole-in-mushroom contact

Abstract

The application relates to an automatic needle correcting assembly and a centering correcting device of a micro-diameter hole inner twisted wire contact, and belongs to the technical field of micro connectors. The automatic needle correcting assembly comprises a lifting mechanism, a rotating mechanism and a needle correcting manipulator. The lifting end of the lifting mechanism is connected with a manipulator support. The rotating mechanism is fixed on the manipulator support and drives the needle correcting manipulator to rotate by a certain angle in the horizontal direction. The needle correcting manipulator comprises a needle correcting base, a finger cylinder, a floating shaft, a needle correcting rod and a side pressing spring. The centering correcting device comprises a rack, the automatic needle correcting assembly, a connector carrier assembly, a visual guiding assembly, a Y-axis linear motor, an X-axis linear motor and a visual detecting assembly. The application utilizes the micro lever principle and combines the torsion of the needle correcting rod, so that the needle head of the twisted wire needle is plastically deformed in a micro length, the rebound after correction is avoided, and the centering correction of the twisted wire needle in a micro hole is realized.

Description

Technical Field

[0001] This invention belongs to the field of micro connector technology, specifically relating to an automatic pin alignment assembly and centering correction device for a twisted contact with a micro-diameter hole. Background Technology

[0002] In the field of micro-connector technology, twist-type contact connectors with micro-diameter holes are an important product category. The twist-type contacts—twisted pins—of this type of connector are typically formed by crimping the pin body and pin tip together. For example... Figure 1 As shown, the needle tip 11 of the twisted needle 10 is twisted and serves as the contact part, while the needle body 12 is the insulating part. During the crimping process, due to factors such as assembly stress and positioning deviations, the center lines of the needle body and the needle tip are difficult to perfectly coincide, often forming an angle between them, leading to excessive coaxiality of the twisted needle itself. To address this problem, existing technologies have relatively mature solutions. For example, the published patent CN220822155U uses a pneumatic chuck to clamp the twisted needle body, detecting and correcting the coaxiality of the needle body and the needle tip through high-speed rotation. Its air supply line is connected in series with a pressure regulating valve to achieve adjustable clamping force, and an adjustable drive head is provided on the sliding sleeve to achieve precise control of the clamping degree. This type of equipment is mainly used for correcting independent workpieces after the twisted needle has been crimped, i.e., the correction object is the individual twisted needle that has not yet been assembled into the connector.

[0003] However, in the overall assembly process of the connector, the twisted pin 10, as a contact element, needs to be inserted into the corresponding mounting hole 21 on the connector insulator 20 to form a complete connector assembly. Figure 2 The contact assembly is shown. After the twisted pin 10 is assembled with the connector insulator 20, its twisted tip 11 is completely housed inside the mounting hole 21 of the connector insulator 20, with no part protruding from the end face of the connector insulator 20. Furthermore, the diameter of the mounting hole 21 on the connector insulator 20 is extremely small, typically around 0.9 mm. In this state, even if the twisted pin has been coaxially corrected during the individual assembly stage, during the insertion into the connector insulator, factors such as assembly force, guide deviation, and hole wall interference may still cause a new positional deviation within the mounting hole of the connector insulator. This can result in the twisted tip not being centered, thus affecting the electrical contact performance and insertion / removal reliability of the connector. Therefore, the centered state of the twisted pin within the hole needs to be corrected again after assembly.

[0004] Currently, there is a lack of mature automated equipment to address the centering and alignment requirements after assembly. This is because: firstly, after the twisted pins are inserted into the connector insulator, their twisted tips are completely concealed within the tiny mounting holes, with no exposed external parts for direct clamping or contact, severely limiting the operational space for alignment tools; secondly, the twisted tips themselves possess a certain degree of elasticity. When performing radial alignment within the tiny mounting holes, the applied radial displacement is insufficient to induce plastic deformation in the contact area due to the hole diameter limitation. Once the alignment force is removed, the twisted pin tips naturally spring back to their skewed position due to material elasticity, failing to achieve a stable centering effect. Existing coaxiality alignment equipment for individual twisted pins is unsuitable for scenarios where the twisted pins are already inserted into the micro-holes of the insulator.

[0005] Therefore, how to overcome the elastic rebound characteristics of twisted needles under the constraint of having completed insulator assembly and the needle tip being hidden in a micro-hole, and achieve reliable and stable centering correction within the hole, is an unsolved technical problem in this field. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic needle alignment assembly and a centering correction device for a twisted contact in a micro-diameter hole. The automatic needle alignment assembly utilizes the principle of micro-leverage and combines the torsion of the needle alignment rod to achieve plastic deformation of the tip of the twisted needle over a small length, avoiding springback after correction, thereby achieving centering correction of the twisted needle in the micro-hole.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: an automatic needle alignment assembly for a twisted contact with a micro-diameter hole, used to center and align the needle tip of the twisted needle after it is inserted into the mounting hole of the connector insulator, comprising: a lifting mechanism, a rotating mechanism, and a needle alignment robot; the lifting end of the lifting mechanism is connected to the robot arm bracket; the rotating mechanism is fixed on the robot arm bracket and connected to the needle alignment robot, driving the needle alignment robot to rotate a certain angle in the horizontal direction; The needle-aligning robot includes a needle-aligning base, a finger cylinder, a floating shaft, a needle-aligning rod, and a side-pressure spring. The upper part of the needle-aligning base is used for transmission connection with the output shaft of the rotating mechanism. The floating shaft is slidably connected to a slide rail at the lower part of the needle-aligning base. The slide rail is arc-shaped, and the floating shaft is vertical in its initial position. The side-pressure spring is mounted on the needle-aligning base and located on one side of the floating shaft, used to push the floating shaft in its initial position to move along the slide rail. The finger cylinder is mounted on the needle-aligning base and located on the other side of the floating shaft, used to push the floating shaft, which has moved along the slide rail, to reset. The needle-aligning rod is mounted on the lower part of the floating shaft. The lower end of the calibration rod is provided with a calibration tip for insertion between the mounting hole wall and the tip of the twisted needle. The calibration tip has a cavity inside, and one side of the cavity is obliquely cut to form an oblique cut. The inner wall of the cavity is a composite curved surface. The composite curved surface is an arc surface in the circumferential direction and an oblique surface in the axial direction that approaches the central axis of the calibration rod from bottom to top. The top of the cavity of the calibration tip is used to constrain the tip of the twisted needle, and the root of the twisted needle serves as the fulcrum for the tilting of the floating axis.

[0008] Its beneficial effects are as follows: The automatic needle alignment component of the present invention can be driven by a lifting mechanism to move the needle alignment robot up and down, inserting the needle alignment tip into the mounting hole that needs to be aligned with the twisted needle. Moreover, the lower end of the composite curved surface of the inner wall of the needle alignment tip cavity is thinner, which can smoothly avoid the waist of the twisted needle. As the insertion depth increases, the tip of the twisted needle will be gradually pressed towards the opposite side along the composite curved surface. When the tip of the twisted needle reaches the top of the cavity, the top of the cavity can constrain the tip of the twisted needle. At this time, the root of the twisted needle serves as a fulcrum, forming a micro-lever structure. Subsequently, when the finger cylinder retracts, the side pressure spring pushes the floating shaft to drive the needle alignment rod to tilt along the slide rail. The tip of the twisted needle is further pressed towards the opposite side wall for radial alignment. At the same time, the rotation mechanism drives the needle alignment robot to rotate at a certain angle, so that the tip of the twisted needle twists to a certain extent, thereby producing plastic deformation and preventing the twisted needle from springing back to its original position after the needle alignment tip leaves the mounting hole.

[0009] Furthermore, the rod body of the needle calibration rod is a flattened rod body formed by cutting one side flat, and the side of the flattened rod body is divided into an arc surface and a flattened surface.

[0010] Its beneficial effect is that by flattening, the needle calibration rod can be prevented from rotating inside the floating shaft, thereby ensuring that the rotating mechanism can accurately control the rotation of the needle calibration rod.

[0011] Furthermore, the upper end of the flattening rod is provided with a limiting head with a diameter larger than the diameter of the rod body, the calibration needle tip is provided at the lower end of the flattening rod body, and the outer diameter of the calibration needle tip is smaller than the diameter of the flattening rod body. The oblique cut of the calibration needle tip is provided on the same side as the flattening surface.

[0012] Its beneficial effect is that the limiting head, by cooperating with the stepped surface inside the floating shaft, prevents the needle calibration rod from falling off the lower end of the floating shaft.

[0013] Furthermore, a floating spring is provided inside the floating shaft, and the lower end of the floating spring is in elastic contact with the upper end face of the needle calibration rod.

[0014] Its beneficial effects are: the floating spring provides elasticity for the needle calibration rod to float up and down, ensuring that the lower end of the needle calibration rod can be in close contact with the tip of the twisted needle, so that the insertion depth of the needle calibration rod into the mounting hole is not affected by the uneven height of the twisted needle, thereby ensuring that the rotation angle parameters of the needle calibration robot are not distorted.

[0015] Furthermore, a plug is provided at the upper end of the floating shaft for adjusting the elastic force of the floating spring.

[0016] Its beneficial effect is that the plug can adjust the elastic force of the floating spring.

[0017] Furthermore, the end of the cylinder rod of the finger cylinder is provided with a pressure head that can slide along the side of the floating shaft.

[0018] Its beneficial effect is that the sliding design of the pressure head can prevent the reset action from getting stuck by sliding the pressure head on the floating shaft during the reset process of the finger cylinder pushing the floating shaft.

[0019] Furthermore, the front end face of the pressure head is a convex arc surface or a spherical surface.

[0020] Its beneficial effects are: the angle between the pressure head and the floating shaft can be flexibly changed during the reset process, while reducing the contact area and reducing frictional resistance.

[0021] Furthermore, the rotating mechanism includes a rotary motor and a rotary reducer.

[0022] This invention also proposes a centering and alignment device for a twisted contact in a micro-diameter hole, comprising a frame and the automatic pin alignment assembly described in any of the above-mentioned embodiments, as well as a connector carrier assembly, a vision guidance assembly, a Y-axis linear motor, an X-axis linear motor, and a vision inspection assembly; the connector carrier assembly is used to fix a connector insulator with twisted pins mounted thereon; the Y-axis linear motor is fixed to the lower part of the frame and is used to drive the connector carrier assembly to move along the Y-axis; the X-axis linear motor is fixed to the upper part of the frame and is used to drive the automatic pin alignment assembly to move along the X-axis; the vision inspection assembly is mounted on the upper part of the frame and located above the movement path of the connector carrier assembly, and is used to detect the coaxiality of the twisted pins and the mounting hole; the vision guidance assembly is located on the lower part of the frame and below the movement path of the automatic pin alignment assembly, and is used to detect the error between the pin alignment rod axis and the mounting hole axis on the connector insulator.

[0023] Its beneficial effects are: the automatic pin alignment component, in conjunction with other mechanisms, can center and align multiple twisted pins in the connector insulator, which is highly efficient and accurate.

[0024] Furthermore, the connector carrier assembly includes a clamping mechanism for clamping the connector insulator from both the left and right sides.

[0025] Its beneficial effect is that the clamping mechanism clamps and fixes the connector insulator from both the left and right sides, which can ensure the basic stability of the connector insulator during the calibration process.

[0026] Furthermore, the clamping mechanism is an electric gripper, including a left gripper and a right gripper. The electric gripper is fixed on the mounting block, and the left gripper and the right gripper are slidably connected to the gripper track on the mounting block.

[0027] Its beneficial effects are: the electric gripper is a clamping mechanism, which is conducive to automated control.

[0028] Furthermore, a left slider is slidably mounted on the left gripper, and a right slider is slidably mounted on the right gripper. The left and right sliders are driven to slide by corresponding lifting cylinders. A left pressure plate is connected to the left slider, and a right pressure plate is connected to the right slider. A left support block is fixed to the left gripper, and a right support block is fixed to the right gripper. During the sliding process, the left pressure plate and the left support block cooperate, and the right pressure plate and the right support block cooperate to clamp the connector insulator from the upper and lower sides.

[0029] Its beneficial effect is that it can clamp the connector insulator from left to right, and also from top to bottom, thereby avoiding the connector insulator from shifting up and down due to the insertion and removal of the calibration pin during the calibration process, and ensuring that the calibration is carried out smoothly.

[0030] A buffer spring is also provided between the left slider and the left gripper, and between the right slider and the right gripper.

[0031] Its beneficial effect is that the buffer spring can prevent the clamping action of the lifting cylinder from damaging the connector insulator.

[0032] The beneficial effects of this invention are: the automatic needle alignment component proposed in this invention utilizes the micro-lever principle to convert the radial correction amount of the twisted needle into the twisting amount of the twisted needle tip, thereby expanding the needle alignment displacement and enabling the twisted needle to achieve plastic deformation in a small length, thus achieving the correction effect and realizing the centering correction of the twisted needle in the micro-hole.

[0033] The micro-diameter hole internal twist-type contact centering and correction device proposed in this invention can improve the level of automation and accuracy of correction based on the automatic needle alignment assembly. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the twisted needle described in this invention; Figure 2 This is a schematic diagram of the structure of the twisted needle inserted into the insulator according to the present invention; Figure 3 This is a schematic diagram of the automatic needle alignment component described in this invention; Figure 4 This is a schematic diagram of the needle-calibrating robot arm in the automatic needle-calibrating assembly described in this invention; Figure 5 This is a schematic diagram of the needle calibration rod in the automatic needle calibration assembly of the present invention; Figure 6 This is a cross-sectional view of the needle calibration rod in the automatic needle calibration assembly of the present invention; Figure 7 This is a schematic diagram of the overall structure of the centering correction device described in this invention; Figure 8 This is a schematic diagram of the connector carrier assembly in the centering and correction device of the present invention; Markings in the diagram: 10, twisted needle; 11, needle tip; 111, needle point; 112, bulging waist; 113, needle root; 12, needle body. 20. Connector insulator; 21. Mounting hole; 1. Lifting mechanism; 2. Rotary motor; 3. Rotary reducer; 4. Robotic arm support; 5. Needle alignment robotic arm; 51. Needle holder, 52. Finger cylinder mounting plate, 53. Finger cylinder, 54. Pressure head, 55. Slide rail, 56. Floating shaft, 57. Needle rod, 5701. Limiting head, 5702. Flattened rod body, 5703. Needle tip, 5704. Angled cut, 5705. Compound curved surface, 5706. Arc surface, 5707. Flattened surface, 5708. Lumen, 58. Floating spring, 59. Side pressure spring, 510. Plug; 100. Automatic pin alignment assembly; 200. Connector carrier assembly; 300. Vision guidance assembly; 400. Y-axis linear motor; 500. X-axis linear motor; 600. Vision inspection assembly; 700. Contact assembly. 201. Clamping mechanism; 202. Left gripper; 203. Right gripper; 204. Left pressure plate; 205. Right pressure plate; 206. Left support block; 207. Right support block; 208. Left slider; 209. Right slider; 210. Left lifting cylinder; 211. Right lifting cylinder; 212. Buffer spring; 213. Gripper track; 214. Mounting block. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the invention in any way.

[0036] Example 1: An automatic pin alignment assembly for a micro-diameter hole-type twisted contact is used to center and align the tip of the twisted pin after it is inserted into the mounting hole of the connector insulator, so that it remains coaxial with the mounting hole.

[0037] The structure of the automatic needle alignment component can be referred to in the appendix. Figure 3The system includes a lifting mechanism 1, a rotary motor 2, a rotary reducer 3, a robotic arm support 4, and a needle-aligning robotic arm 5. The lifting end of the lifting mechanism 1 is connected to one side of the robotic arm support 4. The rotary motor 2 drives the needle-aligning robotic arm 5 to rotate a certain angle in the horizontal direction via the rotary reducer 3, and the rotary reducer 3 is fixedly mounted on the robotic arm support 4. Thus, the lifting mechanism 1 drives the needle-aligning robotic arm 5 to move vertically up and down. In this embodiment, the lifting mechanism 1 is a lifting motor.

[0038] The structure of the needle-calibrating robotic arm 5 is as follows: Figure 4 As shown, the assembly mainly includes a needle alignment seat 51, a finger cylinder mounting plate 52, a finger cylinder 53, a pressure head 54, a slide rail 55, a floating shaft 56, a needle alignment rod 57, a floating spring 58, a side pressure spring 59, and a plug 510. The upper part of the needle alignment seat 51 is used for transmission connection with the output shaft of the rotary reducer 3, thereby driving the needle alignment seat 51 to rotate. The lower part of the needle alignment seat 51 is provided with a mounting cavity, and the side of the mounting cavity is provided with an arc-shaped slide rail 55. The floating shaft 56 can slide along the slide rail 55 through a sliding head on the side. When the sliding head is at the upper end of the slide rail 55, the floating shaft 56 is in its initial position and is in a vertical state. The needle alignment rod 57, the floating spring 58, and the plug 510 are installed inside the floating shaft 56. The floating spring 58 is located between the needle alignment rod 57 and the plug 510. The plug 510 is used to adjust the elastic force of the floating spring 58. The lower end of the needle alignment rod 57 extends from the lower end of the floating shaft 56. The lower end of the needle alignment rod 57 is used to insert into the mounting hole 21 of the connector insulator 20 for mounting the twisted needle 10 (e.g., ...). Figure 2As shown, the needle tip 11 of the twisted needle 10 is centered and corrected. The floating spring 58 provides elastic force for the up-and-down floating of the needle calibration rod 57, ensuring that the lower end of the needle calibration rod 57 can be in close contact with the needle tip 11 of the twisted needle 10. This ensures that the insertion depth of the needle calibration rod 57 into the mounting hole 21 is not affected by the uneven height of the twisted needle 10, thus preventing distortion of the rotation angle parameters of the needle calibration robot 5. The side pressure spring 59 is installed in the radial hole on the side of the needle calibration seat 51. This radial hole communicates with the cavity at the lower part of the needle calibration seat 51. The outer end of the side pressure spring 59 abuts against the stepped surface inside the radial hole, and the inner end of the side pressure spring 59 abuts against one side of the upper end of the floating shaft 56. This provides power for the tilting of the floating shaft 56 along the slide rail 55, thereby tilting the needle calibration rod 57 and radially correcting the needle tip 11 of the twisted needle 10. The finger cylinder 53 is fixed to the side of the needle-aligning seat 51 via the finger cylinder mounting plate 52. The finger cylinder 53 and the side pressure spring 59 are located on opposite sides of the floating shaft 56. The cylinder rod of the finger cylinder 53 extends into the cavity at the lower part of the needle-aligning seat 51 and presses against the other side of the upper part of the floating shaft 56 through the pressure head 54 installed at its end. After needle alignment is completed, the cylinder rod of the finger cylinder 53 extends to push the floating shaft 56 back to its original position, thereby resetting the needle alignment rod 57. The pressure head 54 can be made of metal, and the front end of the pressure head 54 is set as a convex spherical or arc surface for contact with the side of the floating shaft 56, facilitating sliding and relative rotation along the floating shaft 56. During the tilting and swinging process of the floating shaft 56 from its initial position, the finger cylinder 53 retracts its cylinder rod, so that the side pressure spring 59 can release its elastic force to push the floating shaft 56 to tilt along the slide rail 55.

[0039] The structure of the needle rod 57 is as follows: Figure 5 , 6As shown, the needle calibration rod 57 has a flattened rod body 5702 formed by cutting one side flat. The side of the flattened rod body 5702 is divided into an arc surface 5706 and a flattened surface 5707. By flattening, the needle calibration rod 57 can be prevented from rotating within the floating shaft 56, thus allowing it to rotate synchronously with the needle calibration seat 51. The upper end of the flattened rod body 5702 is provided with a limiting head 5701 with a diameter larger than the rod body diameter, and the lower end of the flattened rod body 5702 is provided with a needle calibration tip 5703 with a diameter smaller than the rod body diameter. After the needle calibration rod 57 is inserted into the floating shaft 56, the lower surface of the limiting head 5701 can be supported on the stepped surface within the hole of the floating shaft 56, thereby preventing the needle calibration rod 57 from falling off the lower end of the floating shaft 56. The upper surface of the limiting head 5701 contacts the lower end of the floating spring 58. The calibration needle tip 5703 is formed by cutting the cylindrical sleeve obliquely from top to bottom on the side of the flat surface 5707. The oblique cut passes through the central axis of the calibration needle rod 57, thus forming an oblique cut 5704 through the central axis on the side of the calibration needle tip 5703. The outer surface of the calibration needle tip 5703 is divided into an arc surface and an oblique cut surface. The oblique cut surface is the oblique surface where the oblique cut 5704 is located, and the arc surface is the original arc surface of the cylindrical sleeve. The inner wall of the calibration needle tip 5703 is a composite curved surface 5705. The composite curved surface 5705 is an arc surface in the circumferential direction and an inclined surface in the axial direction that approaches the central axis of the calibration needle rod 57 from bottom to top. That is, the wall thickness of the tube opposite the oblique cut 5704 gradually increases from bottom to top. This makes the cavity 5708 of the cylindrical sleeve before the oblique cut form a "bottle-shaped structure". The bottom edge of the calibration needle tip 5703 is part of the bottom circle of the "bottle-shaped structure", and its center is located on the central axis of the calibration needle rod 57. The center of the top of the cavity 5708, that is, the mouth circle of the "bottle-shaped structure", is away from the central axis of the calibration needle rod 57 and is biased towards the side of the flat surface 5707 of the calibration needle rod 57.

[0040] The working process of the automatic needle alignment component of the present invention is as follows: when multiple Figure 1 The twisted pins 10 shown are assembled one by one into the mounting holes 21 of the connector insulator 20 to obtain... Figure 2The contact assembly shown was tested and found that when the tip 11 of the twisted needle 10 in a certain mounting hole 21 is not coaxial with the mounting hole 21, the twisted needle 10 is not centered. In this case, the automatic needle alignment assembly of the present invention is needed to center and correct it. In use, the rotary motor 2 drives the needle-calibrating robot arm 5 to rotate at a certain angle, so that the needle-calibrating tip 5703 of the needle-calibrating rod 57 can be inserted into the gap between the needle tip 11 and the wall of the mounting hole 21 from the oblique direction of the needle tip 11 of the twisted needle 10. The lifting mechanism 1 is activated to insert the needle-calibrating tip 5703 into the mounting hole 21. At this time, the wall of the tube 5708 at the lower part of the needle-calibrating tip 5703 is relatively thin, which makes it easy to avoid the bulging waist 112 of the needle tip 11. As the insertion depth increases, the needle tip 111 of the twisted needle 10 will be gradually pressed towards the opposite side of the mounting hole 21 along the composite curved surface 5705. When the needle tip 111 of the twisted needle 10 reaches the top of the tube 5708, the top of the tube 5708 can constrain the needle tip 111 of the twisted needle 10. At this time, the root 11 of the twisted needle 10... 3 serves as the fulcrum, forming a micro-lever structure; then the finger cylinder 53 is retracted, the elastic force of the side pressure spring 59 is released, the elastic force is perpendicular to the cut flat surface 5707, thereby pushing the floating shaft 56 to tilt along the slide rail 55, the twisted needle 10 uses the needle root 113 as the fulcrum, the needle tip 111 continues to press against the hole wall on the other side of the mounting hole 21, forming a micro-lever effect; at this time, the rotary motor 2 drives the needle alignment robot 5 to rotate, thereby rotating the needle alignment rod 57, driving the needle tip 11 of the twisted needle 10 to twist, converting the radial correction amount into the twisting amount of the needle tip 11 of the twisted needle 10, which both expands the needle alignment displacement and shortens the length of the correction part, realizing the plastic deformation of the twisted needle 10 in a small length, thereby achieving the correction effect, realizing the centering correction of the twisted needle 10 in the small hole. After calibration, the lifting mechanism 1 drives the needle calibration robot 5 to rise, the needle calibration rod 57 leaves the mounting hole 21, and then the finger cylinder 53 resets, pushing the floating shaft 56 back to the initial vertical position, and the side pressure spring 59 is compressed again.

[0041] Example 2: This example proposes as follows Figure 7 The centering and alignment device for the micro-diameter hole twisted contact shown includes a frame, the automatic pin alignment assembly 100 described in Example 1, a connector carrier assembly 200, a vision guidance assembly 300, a Y-axis linear motor 400, an X-axis linear motor 500, and a vision inspection assembly 600.

[0042] The Y-axis linear motor 400 is fixed to the lower part of the frame, and the X-axis linear motor 500 is fixed to one side of the crossbeam at the upper part of the frame and located above the Y-axis linear motor 400.

[0043] The frame of the lifting mechanism 1 of the automatic needle alignment component 100 is mounted on the sliding part of the X-axis linear motor 500, so that the automatic needle alignment component 100 can move along the X-axis direction.

[0044] The connector carrier assembly 200 is used to clamp and fix the contact assembly 700 to be calibrated, such that the needle tip 11 of the twisted needle 10 in the mounting hole 21 of the contact assembly 700 faces upward, so as to facilitate the calibration by the automatic needle alignment assembly 100. The connector carrier assembly 200 is mounted on the sliding part of the Y-axis linear motor 400, realizing the linear movement of the connector carrier assembly 200 along the Y-axis.

[0045] The structure of the connector carrier assembly 200 is as follows: Figure 8 As shown, the device includes a clamping mechanism 201, a left gripper 202, a right gripper 203, a left pressure plate 204, a right pressure plate 205, a left support block 206, a right support block 207, a left slider 208, a right slider 209, a left lifting cylinder 210, a right lifting cylinder 211, a buffer spring 212, a gripper track 213, and a mounting block 214. In this embodiment, the clamping mechanism 201 is an electric gripper fixed to the mounting block 214. The front end face of the mounting block 214 is provided with a gripper track 213, and the left gripper 202 and right gripper 203 of the electric gripper are slidably connected to the gripper track 213. The left gripper 202 and right gripper 203 clamp by opening and closing. Figure 2 The left and right sides of the contact assembly 700 are shown. A left support block 206 and a right support block 207 are respectively provided on the left jaw 202 and right jaw 203. When the contact assembly 700 is clamped from both sides, its two ends are supported on the left support block 206 and right support block 207 respectively. A left slider 208 that can slide up and down is connected to the left jaw 202. The lower end of the left slider 208 is connected to a left lifting cylinder 210 installed below the left jaw 202, which drives the left slider 208 to slide up and down. A left pressure plate 204 is fixedly connected to the upper end of the left slider 208. A right slider 209 and a right lifting cylinder 211 are installed on the right jaw 203 in the same manner. A right pressure plate 205 is fixed to the upper end of the right slider 209. The left lifting cylinder 210 and the right lifting cylinder 211 control the left slider 208 and the right slider 209 to slide up and down respectively, thereby pressing the contact component 700 against the left support block 206 and the right support block 207 by the left pressure plate 204 and the right pressure plate 205, achieving vertical clamping of the contact component 700. Ultimately, reliable clamping and fixing of the contact component 700 is achieved. Furthermore, the buffer spring 212 is disposed between the left slider 208 and the left gripper 202, and between the right slider 209 and the right gripper 203, to buffer the clamping force of the left pressure plate 204 and the right pressure plate 205, preventing damage to the contact component 700.

[0046] The visual guidance component 300 is located at the bottom of the frame and to one side of the Y-axis linear motor 400. It compensates for the error between the axis of the needle alignment rod 57 and the axis of the mounting hole 21 on the connector insulator 20, eliminating errors caused by the rotation of the automatic needle alignment component 100 and machining, ensuring the needle alignment rod 57 is accurately inserted into the mounting hole 21 of the connector insulator 20, and avoiding damage to the connector insulator 20. The visual guidance component 300 includes a guiding CCD camera, a guiding CCD lens, and a guiding CCD light source. The detection area of ​​the guiding CCD camera is only 3 square millimeters, specifically designed to detect small features such as the end face of the needle alignment rod 57, and sends the position error compensation amount to the X / Y-axis linear motors to provide precise positioning for the needle alignment rod 57. The guiding CCD lens is used to more accurately present the position of the entire end face of the needle alignment rod 57. The guiding CCD light source is used to illuminate the end face of the needle alignment rod 57, making position detection more accurate. The visual guidance component 300 is located directly below the automatic needle alignment component 100 along the X-axis movement path, so as to more accurately detect the end face position of the needle alignment rod 57.

[0047] The vision inspection component 600 is mounted on the crossbeam of the frame, and is located on opposite sides of the crossbeam as well as the automatic pin alignment component 100. The vision inspection component 600 is positioned directly above the path along which the connector carrier assembly 200 moves along the Y-axis. The vision inspection component 600 is used to detect the coaxiality of the twisted pin 10 and the mounting hole 21, and to accurately measure the coaxiality deviation data and offset direction. The vision inspection component 600 includes a detection CCD camera, a detection CCD lens, and a detection CCD light source. The detection CCD camera has 65 megapixels and can accurately detect the coaxiality error and offset direction of the twisted pin 10. The detection CCD lens is used to more accurately present all the mounting hole 21 positions of the entire connector insulator 20, while simultaneously detecting the twisted pins 10 within these holes. The detection CCD light source is used to illuminate the mounting holes 21, revealing the subtle features of the twisted pins 10 within the holes.

[0048] The operation of the centering and correction device for the twisted pin 10 within the mounting hole 21 of the connector insulator 20 is as follows: First, the contact component 700 to be tested is fixed on the connector carrier assembly 200. The Y-axis linear motor 400 moves the connector carrier assembly 200 and the contact component 700 below the vision inspection assembly 600. The detection CCD camera detects the coaxiality error of the twisted pin 10 in the contact component 700 and records the hole position to be corrected and the corresponding offset direction of the twisted pin 10. Then, driven by the rotary motor 2, the needle alignment robot 5 rotates the composite curved surface of the needle alignment rod 57 to the offset direction side of the twisted pin 10. The X-axis linear motor 500 moves the needle alignment robot 5 to directly above the vision guidance assembly 300. The guidance CCD camera detects the end face position of the needle alignment rod 57 and sends the position error compensation amount to the X / Y axis linear motors to provide precise positioning for the needle alignment rod 57. Then, the X-axis linear motor 500 moves the needle-calibrating robot 5, and the Y-axis linear motor 400 moves the connector carrier assembly 200, so that the needle-calibrating rod 57 can be inserted downward into the mounting hole 21 on the contact assembly 700 that requires the twist needle 10 to be calibrated, and inserted between the twist needle 10 and the wall of the mounting hole 21 from the offset direction of the twist needle 10. Next, the lifting mechanism 1 of the automatic needle alignment assembly 100 controls the needle alignment robot 5 to move downward so that the needle alignment rod 57 is inserted into the mounting hole 21 until the floating spring 58 is in a slightly compressed state. The top of the tube 5708 at the end of the needle alignment rod 57 constrains the tip 111 of the twisted needle 10, and the lower end of the needle alignment rod abuts against the root 113 of the twisted needle 10. The finger cylinder 53 retracts, the elastic force of the side pressure spring 59 is released, and the floating shaft 56 is pushed to tilt along the slide rail 55. With the root 113 of the twisted needle 10 as the fulcrum, the needle alignment rod 57 squeezes the tip 11 of the twisted needle 10 in the opposite direction of its offset direction. At the same time, the rotary motor 2 drives the needle alignment robot 5 to rotate a certain angle so that the tip 11 of the twisted needle 10 reaches a certain amount of twisting, so that the twisted needle 10 is plastically deformed in a small length to achieve the correction effect and realize the centering correction of the twisted needle 10 in the small hole. After calibration, the finger cylinder 53 extends and resets the needle calibration rod 57 to its initial vertical position. The needle calibration robot 5 is driven upward by the lifting mechanism 1 to pull the needle calibration rod 57 out of the mounting hole 21 of the contact component 700. This completes the centering calibration of a twisted needle 10 in the mounting hole 21.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the specific implementation of the present invention with reference to the above embodiments. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are within the protection scope of the pending claims.

Claims

1. An automatic pin alignment assembly for a micro-diameter hole-type twisted contact, used to center and align the tip (11) of the twisted pin (10) after it is inserted into the mounting hole (21) of the connector insulator (20), characterized in that, include: Lifting mechanism (1), rotating mechanism and needle-aligning robot (5); the lifting end of the lifting mechanism (1) is connected to the robot support (4); the rotating mechanism is fixed on the robot support (4) and connected to the needle-aligning robot (5) to drive the needle-aligning robot (5) to rotate a certain angle in the horizontal direction; The needle-calibrating robot (5) includes a needle-calibrating seat (51), a finger cylinder (53), a floating shaft (56), a needle-calibrating rod (57), and a side-pressure spring (59). The upper part of the needle-calibrating seat (51) is used for transmission connection with the output shaft of the rotating mechanism. The floating shaft (56) is slidably connected to the slide rail (55) at the lower part of the needle-calibrating seat (51). The slide rail (55) is arc-shaped, and the floating shaft (56) is vertical when it is in the initial position. The side-pressure spring (59) is installed on the needle-calibrating seat (51) and located on one side of the floating shaft (56). It is used to push the floating shaft (56) in the initial position to move along the slide rail (55). The finger cylinder (53) is installed on the needle-calibrating seat (51) and located on the other side of the floating shaft (56). It is used to push the floating shaft (56) moving along the slide rail (55) to reset. The needle-calibrating rod (57) is installed at the lower part of the floating shaft (56). The lower end of the calibration rod (57) is provided with a calibration tip (5703) for inserting between the wall of the mounting hole (21) and the tip (11) of the twisted needle (10). The calibration tip (5703) has a cavity (5708) inside, and one side of the cavity (5708) is obliquely cut to form an oblique cut (5704). The inner wall of the cavity (5708) is a composite curved surface (5705). The composite curved surface (5705) is an arc surface in the circumferential direction and an oblique surface in the axial direction that approaches the central axis of the calibration rod (57) from bottom to top. The top of the cavity (5708) of the calibration tip (5703) is used to constrain the tip (111) of the twisted needle (10). The root (113) of the tip of the twisted needle (10) serves as the fulcrum for the tilting of the floating shaft (56).

2. The automatic needle alignment assembly according to claim 1, characterized in that, The rod body of the needle rod (57) is a flattened rod body (5702) formed by cutting one side flat. The side of the flattened rod body (5702) is divided into an arc surface (5706) and a flattened surface (5707).

3. The automatic needle alignment assembly according to claim 2, characterized in that, The upper end of the flattened rod (5702) is provided with a limiting head (5701) with a diameter larger than that of the rod. The calibration needle tip (5703) is provided at the lower end of the flattened rod (5702), and the outer diameter of the calibration needle tip (5703) is smaller than that of the flattened rod. The oblique cut (5704) of the calibration needle tip (5703) is provided on the same side as the flattened surface (5707).

4. The automatic needle alignment assembly according to claim 1, characterized in that, A floating spring (58) is provided inside the floating shaft (56), and the lower end of the floating spring (58) is in elastic contact with the upper end face of the needle rod (57).

5. The automatic needle alignment assembly according to claim 4, characterized in that, The upper end of the floating shaft (56) is also provided with a plug (510) for adjusting the elastic force of the floating spring (58).

6. The automatic needle alignment assembly according to claim 1, characterized in that, The finger cylinder (53) has a pressure head (54) at the end of the cylinder rod that can slide along the side of the floating shaft (56).

7. The automatic needle alignment assembly according to claim 6, characterized in that, The front end face of the pressure head (54) is an outwardly convex arc surface or spherical surface.

8. The automatic needle alignment assembly according to claim 1, characterized in that, The rotating mechanism includes a rotary motor (2) and a rotary reducer (3).

9. A centering and correction device for a twist-type contact element with a micro-diameter hole, characterized in that, The system includes a frame and an automatic pin alignment assembly (100) as described in any one of claims 1-8, as well as a connector carrier assembly (200), a vision guidance assembly (300), a Y-axis linear motor (400), an X-axis linear motor (500), and a vision inspection assembly (600); the connector carrier assembly (200) is used to fix a connector insulator (20) with twisted pins (10) mounted thereon; the Y-axis linear motor (400) is fixed to the lower part of the frame and is used to drive the connector carrier assembly (200) to move along the Y-axis; the X-axis linear motor (5 ... The automatic pin alignment assembly (100) is fixed on the upper part of the frame and is used to drive the automatic pin alignment assembly (100) to move along the X-axis; the vision inspection assembly (600) is installed on the upper part of the frame and located above the moving path of the connector carrier assembly (200) and is used to detect the coaxiality of the twist pin (10) and the mounting hole (21); the vision guide assembly (300) is located on the lower part of the frame and below the moving path of the automatic pin alignment assembly (100) and is used to detect the error between the axis of the pin alignment rod (57) and the axis of the mounting hole (21) on the connector insulator (20).

10. The centering correction device according to claim 9, characterized in that, The connector carrier assembly (200) includes a clamping mechanism (201) for clamping the connector insulator (20) from the left and right sides.

11. The centering correction device according to claim 10, characterized in that, The clamping mechanism (201) is an electric gripper, including a left gripper (202) and a right gripper (203). The electric gripper is fixed on the mounting block (214), and the left gripper (202) and the right gripper (203) are slidably connected on the gripper track (213) on the mounting block (214).

12. The centering correction device according to claim 11, characterized in that, A left slider (208) is slidably mounted on the left jaw (202), and a right slider (209) is slidably mounted on the right jaw (203). The left slider (208) and the right slider (209) are driven to slide by corresponding lifting cylinders. A left pressure plate (204) is connected to the left slider (208), and a right pressure plate (205) is connected to the right slider (209). A left support block (206) is fixed on the left jaw (202), and a right support block (207) is fixed on the right jaw (203). During the sliding process, the left pressure plate (204) and the left support block (206) cooperate, and the right pressure plate (205) and the right support block (207) cooperate to clamp the connector insulator (20) from the upper and lower sides.

13. The centering correction device according to claim 12, characterized in that, A buffer spring (212) is also provided between the left slider (208) and the left gripper (202) and between the right slider (209) and the right gripper (203).

Images