A hexagonal screw measuring tool for internal angle screw production

Abstract

The invention relates to a screw detection gauge, a hexagonal internal detection gauge for internal angle screw production, comprising a base, the upper end of the base is connected with a detection frame, the detection frame comprises a support rod, the top end of the support rod is installed with a horizontal guide rail, the movable end of the horizontal guide rail is connected with a detection platform, the lower end of the detection platform is fixedly connected with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a mounting plate; an image acquisition device is installed on the mounting plate; the lower end of the mounting plate is fixedly connected with a center rod, the center rod comprises a hollow clamping rod, the bottom end of the hollow clamping rod is fixedly connected with a laser ranging probe, the bottom end of the mounting plate is installed with a connecting seat matching a wiring plug, and the bottom end of a ring column body is installed with a pressure sensing ring; the outer end of the base is fixedly connected with a conveying device matching the detection frame, a screw fixing frame is placed on the conveying device, so as to realize rapid detection of the hexagonal internal angle of the screw by inserting a detection column of preset specifications into the hexagonal internal hole of the screw, and the detection rate is relatively high.

Description

Technical Field

[0001] The invention relates to a hexagon socket detection gauge for internal angle screw production, and in particular to a hexagon socket detection gauge for screw detection gauges. Background Art

[0002] Hexagon socket screw is a common mechanical connection element, also known as hexagon socket head screw or hexagon socket screw. Its head is hexagonal and is usually screwed in or out with an hexagon wrench or torque wrench. Hexagon socket screws are widely used in current production and life. In order to ensure the quality of hexagon socket screws, it is necessary to measure their inner angles after production to ensure the qualified rate of the production batch.

[0003] In order to solve the problem of detecting the internal angle of hexagon socket screws, a certain detection measuring tool on the market adopts the design of vernier caliper detection, which has a certain market share.

[0004] The specification of Chinese invention patent CN116754398A discloses a hexagonal screw forming mold and detection method, including a forming base plate, a longitudinally arranged installation main rod is arranged in the middle of the forming base plate, a capping panel is arranged on the top of the installation main rod, an annular plate is arranged on the outer side of the forming base plate, and a plurality of forming lower molds are arranged on the annular plate so as to rotate evenly in a circumferential direction, and a forming upper mold matched with the forming lower mold is arranged directly above one of the forming lower molds; the invention can realize the casting and forming of the hexagonal screw by cooperating with the forming upper mold and the forming lower mold, and at the same time, the formed hexagonal screw can be rotated to the detection area by rotating the annular plate, so as to perform torsional strength and thread slippage detection on the formed hexagonal screw through the detection device.

[0005] At present, the detection of the hexagon socket of the screw mainly involves detecting the opposite sides of the hexagon socket of the screw, and this detection method is mostly performed by a vernier caliper, which has a slow detection rate and is prone to errors during detection. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing method for detecting the hexagon socket of a screw has a slow detection rate and is prone to errors during detection.

[0007] In order to solve the above problems, the present invention provides a hexagon socket detection gauge for internal angle screw production, comprising a base, the upper end of the base is connected to a detection frame, the detection frame comprises a support rod, the top end of the support rod is installed with a horizontal guide rail, the movable upper end of the horizontal guide rail is connected with a detection platform, the lower end of the detection platform is fixedly connected with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a mounting plate; an image acquisition device is installed on the mounting plate;

[0008] The lower end of the mounting plate is fixedly connected with a center rod, the center rod comprises a hollow clamping rod, the bottom end of the hollow clamping rod is fixedly connected with a laser distance measuring probe, and the outer side of the hollow clamping rod is clamped with a detection column;

[0009] The detection column includes a ring column body, a wiring plug is installed at the top of the ring column body, a connection seat matching the wiring plug is installed at the bottom of the mounting plate, and a pressure sensing ring is installed at the bottom of the ring column body. The pressure sensing ring is annular, and the outer wall of the pressure sensing ring matches the outer wall of the ring column body;

[0010] The outer end of the base is fixedly connected with a conveying device matched with the detection frame, and a screw fixing frame is placed on the conveying device.

[0011] In the above-mentioned hexagon socket detection gauge used for the production of internal angle screws, the internal hexagon socket of the screw is quickly detected by inserting a detection column of preset specifications into the internal hexagon socket hole of the screw, and the detection rate is relatively high.

[0012] As a further improvement of the present application, a plurality of screw placement holes are provided on the screw fixing frame, and each screw placement hole is provided with a number.

[0013] As a further improvement of the present application, the wiring plugs are provided as a pair, and the pair of wiring plugs are used for charging and data transmission respectively.

[0014] As a further improvement of the present application, an electromagnet column is installed in the hollow clamping rod, and a permanent magnet matching the electromagnet column is installed in the ring column body.

[0015] As another improvement of the present application, it also includes a detection control system, which includes a processor installed in the detection platform, and the processor is connected to a detection module, a positioning and calibration module, a control module, a data processing module and a visualization module, and the detection frame, a laser ranging probe, a detection column and a transmission device are all connected to the controller signal.

[0016] As another improved supplement to the present application, the positioning and calibration module is used to calibrate the detection column with the center of the hexagonal hole of the screw to be detected. During the calibration, the detection table is made to reciprocate a set distance by controlling the horizontal guide rail, and the vertex coordinates of the distance curve measured by the laser ranging probe during the reciprocating motion are detected; then the transmission device is controlled to drive the screw fixing frame to reciprocate a set distance, and the vertex coordinates of the distance curve measured by the laser ranging probe during the reciprocating motion are detected, and the vertex coordinates measured twice are used as the calibration positioning points of the detection column.

[0017] As another improved supplement of the present application, when the detection module is working, it analyzes whether the hexagonal socket of the screw is qualified based on the extension length of the electric telescopic rod, the ranging distance of the laser ranging probe and the pressure detected by the pressure sensing ring.

[0018] As another improvement of the present application, a display screen is connected to the visualization module, and the visualization module is used to display whether the screw inspection is qualified and the inspection data; when the visualization module displays the inspection result, the image recognition module identifies the number of the screw placement hole corresponding to the inspected screw.

[0019] In summary, this solution uses a detection column of preset specifications to insert into the hexagonal hole of the screw to quickly detect the hexagonal socket of the screw. During the detection, the detection column can be quickly calibrated to match the center position of the hexagonal hole to ensure that when the calibrated detection column is inserted into the hexagonal hole, the laser ranging probe can detect the deepest hole depth. The upper part of the hexagonal hole is detected by detecting whether the detection column is inserted. After the detection column is inserted, the lower part of the hexagonal hole is detected by the laser ranging probe, and the detection rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of the first embodiment of the present application;

[0021] Figure 2 This is a cross-sectional view of the first embodiment of the present application;

[0022] Figure 3 for Figure 2 The structural diagram at A in the middle;

[0023] Figure 4 This is a side view of the first and second embodiments of the present application when performing detection work;

[0024] Figure 5 It is a partial cross-sectional view of the detection column during detection of the first and second embodiments of the present application;

[0025] Figure 6 This is a system block diagram of the second implementation mode of the present application;

[0026] Figure 7 This is a schematic diagram of a distance curve measured by a laser ranging probe according to the second embodiment of the present application;

[0027] Figure 8 Schematic diagram of screws that failed inspection in both the first and second implementation modes of the present application.

[0028] Description of the numbers in the figure:

[0029] 1 base, 2 detection frame, 201 support rod, 202 horizontal guide rail, 203 detection table, 204 electric telescopic rod, 205 installation plate, 3 center rod, 301 hollow clamp rod, 302 laser ranging probe, 4 detection column, 401 ring column body, 402 wiring plug, 403 pressure sensing ring, 5 transmission device. DETAILED DESCRIPTION

[0030] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0031] The first implementation method:

[0032] Figure 1-5 Shown is a hexagon socket detection gauge for internal angle screw production, comprising a base 1, the upper end of the base 1 is connected to a detection frame 2, the detection frame 2 comprises a support rod 201, the top of the support rod 201 is installed with a horizontal guide rail 202, the movable upper part of the horizontal guide rail 202 is connected to a detection table 203, the lower end of the detection table 203 is fixedly connected to an electric telescopic rod 204, the telescopic end of the electric telescopic rod 204 is fixedly connected to a mounting plate 205; an image acquisition device is installed on the mounting plate 205, the image acquisition device is used to acquire an image of the screw to be detected, so as to facilitate the preliminary positioning of the screw to be detected through the image, and to facilitate the screw to be detected to be close to the detection column 4;

[0033] The lower end of the mounting plate 205 is fixedly connected with a center rod 3, and the center rod 3 includes a hollow clamping rod 301, and the bottom end of the hollow clamping rod 301 is fixedly connected with a laser ranging probe 302, an electromagnet column is installed in the hollow clamping rod 301, and a permanent magnet matching the electromagnet column is installed in the ring column body 401; a detection column 4 is clamped on the outer side of the hollow clamping rod 301, and the detection column 4 is preset with different size specifications.

[0034] The detection column 4 includes a ring column body 401, a wiring plug 402 is installed on the top of the ring column body 401, a connecting seat matching the wiring plug 402 is installed on the bottom of the mounting plate 205, the connecting seat is electrically connected to the detection platform 203, and a pressure sensing ring 403 is installed on the bottom of the ring column body 401. The pressure sensing ring 403 is annular, and the outer wall of the pressure sensing ring 403 matches the outer wall of the ring column body 401; the wiring plug 402 is set as a pair, and a pair of wiring plugs 402 are used for charging and data transmission respectively.

[0035] The outer end of the base 1 is fixedly connected with a conveying device 5 matching the detection frame 2, the conveying device 5 includes a horizontal conveyor belt, the conveying device 5 is perpendicular to the horizontal guide rail 202, and a screw fixing frame is placed on the conveying device 5. The screw fixing frame is provided with a plurality of screw placement holes, each of which is provided with a number.

[0036] This solution performs testing by inserting the testing rod 4 into the hexagonal socket of the internal angle screw, wherein the outer diameter of the testing rod 4 matches the inscribed circle of the internal hexagonal hole. If the testing rod 4 cannot be inserted into the internal hexagonal hole, it can be quickly determined that the internal hexagonal hole is unqualified.

[0037] If the detection column 4 is inserted into the hexagonal hole, when the detection column 4 is inserted to the bottom end of the upper part of the hexagonal hole, the pressure value detected by the pressure sensing ring 403, the distance value of the laser distance measuring probe 302 and the extension length of the electric telescopic rod 204 are used to determine whether the detection column 4 is inserted into the bottom end of the upper part of the hexagonal hole;

[0038] Before testing, the testing column 4 can be pre-staggered with the hexagonal hole on the screw, and then the testing column 4 is driven down to fit with the surface of the screw, and then the extension length of the electric telescopic rod 204 is recorded;

[0039] If the recorded extension length of the electric telescopic rod 204 matches the extension length of the electric telescopic rod 204 when the pressure sensing ring 403 is compressed during the test, it can be determined that the test column 4 is not inserted into the hexagonal hole;

[0040] The laser distance measuring probe 302 is then used to detect the distance of the lower part of the hexagonal hole relative to the laser distance measuring probe 302. If the detected distance does not match the set distance value range, the hexagonal hole is judged to be unqualified.

[0041] Figure 8 It is shown that during the measurement process, if the detection column 4 cannot be inserted into the hexagonal hole of the screw to be tested, it means that the hole diameter of the hexagonal hole is smaller than the set hole diameter, and the screw is marked as unqualified;

[0042] If the data measured by the laser distance measuring probe 302 does not match the set data after the detection column 4 is inserted into the bottom end of the hexagonal hole, it means that the upper hole diameter of the hexagonal hole is larger, or the lower hole depth does not meet the requirements; in this case, the screw is marked as unqualified;

[0043] In this embodiment, a detection column 4 of preset specifications is inserted into the hexagon socket hole of the screw to perform a rapid detection of the hexagon socket of the screw, and the detection rate is relatively high.

[0044] Second implementation method:

[0045] Figure 4-8 As shown, it also includes a detection control system, which includes a processor installed in the detection platform 203, to which a detection module, a positioning calibration module, a control module, a data processing module and a visualization module are connected, and the detection frame 2, the laser ranging probe 302, the detection column 4 and the conveying device 5 are all connected to the controller signal.

[0046] The positioning and calibration module is used to calibrate the detection column 4 with the center of the hexagonal hole of the screw to be detected. During the calibration, the detection platform 203 is made to reciprocate a set distance by controlling the horizontal guide rail 202, and the vertex coordinates of the distance curve measured by the laser ranging probe 302 during the reciprocating motion are detected; then the conveying device 5 is controlled to drive the screw fixing frame to reciprocate a set distance, and the vertex coordinates of the distance curve measured by the laser ranging probe 302 during the reciprocating motion are detected. The vertex coordinates measured twice are used as the calibration positioning points of the detection column 4.

[0047] When the detection module is working, it analyzes whether the hexagon socket hole of the screw is qualified according to the extension length of the electric telescopic rod 204, the ranging distance of the laser ranging probe 302 and the pressure detected by the pressure sensing ring 403.

[0048] A display screen is connected to the visualization module, and the visualization module is used to display whether the screw is qualified and the detection data; when the visualization module displays the detection result, the image recognition module identifies the number of the screw placement hole corresponding to the detected screw.

[0049] When this solution is working, before inserting the detection column 4 into the hexagonal hole on the internal angle screw, the midpoint of the hexagonal hole and the laser ranging probe 302 need to be calibrated; after the laser ranging probe 300 is calibrated with the midpoint of the hexagonal hole through the positioning calibration module;

[0050] Control the detection column 4 to descend, and detect whether the upper part of the hexagonal hole is too small by judging whether the detection column 4 is inserted into the hexagonal hole; after the detection column 4 is inserted into the bottom end of the hexagonal hole, the laser ranging probe 302 measures the depth of the lower part of the hexagonal hole; the laser ranging probe 302 is used to measure whether the depth of the lower part of the hexagonal hole is qualified;

[0051] For non-metallic screws marked as unqualified, each hole of the fixing frame is numbered. The number of the corresponding hole of the screw marked as unqualified is collected and identified by the image acquisition device, and the number is recorded and displayed visually. After all the screws are inspected, the technicians will remove the screws from the holes with the corresponding numbers, which is convenient for removing the unqualified screws after continuous inspection.

[0052] This embodiment matches the laser distance measuring probe 302 with the midpoint position of the hexagonal hole through the positioning calibration module, ensuring that after the laser distance measuring probe 302 is inserted into the hexagonal hole, the hole depth at the bottom of the hexagonal hole can be accurately detected, making it easy to ensure detection accuracy. This solution can be tested by simply inserting the detection column 4 of preset specifications into the hexagonal hole after calibration, which is convenient and quick;

[0053] In summary, this scheme performs rapid detection of the hexagonal socket of the screw by inserting a detection column 4 of preset specifications into the hexagonal socket of the screw. During detection, the detection column 4 can be quickly calibrated to match the center position of the hexagonal socket, ensuring that when the calibration detection column is inserted into the hexagonal socket, the laser ranging probe can detect the deepest hole depth. Whether the detection column 4 is inserted into the upper part of the hexagonal socket is detected. After the detection column 4 is inserted, the lower part of the hexagonal socket is detected by the laser ranging probe, and the detection rate is relatively high.

[0054] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A hexagon socket measuring tool for internal angle screw production, comprising a base (1), characterized in that: The upper end of the base (1) is connected to a detection frame (2), the detection frame (2) comprising a support rod (201), a horizontal guide rail (202) being mounted on the top of the support rod (201), a detection platform (203) being movably connected to the horizontal guide rail (202), a motorized telescopic rod (204) being fixedly connected to the lower end of the detection platform (203), a mounting plate (205) being fixedly connected to the telescopic end of the motorized telescopic rod (204); an image acquisition device being mounted on the mounting plate (205); The lower end of the mounting plate (205) is fixedly connected to a central rod (3), the central rod (3) comprising a hollow clamping rod (301), the bottom end of the hollow clamping rod (301) is fixedly connected to a laser distance measuring probe (302), and the outer side of the hollow clamping rod (301) is clamped with a detection column (4); The detection column (4) comprises a ring column body (401), a wiring plug (402) is installed at the top end of the ring column body (401), a connection seat matching the wiring plug (402) is installed at the bottom end of the mounting plate (205), and a pressure sensing ring (403) is installed at the bottom end of the ring column body (401), the pressure sensing ring (403) is annular, and the outer wall of the pressure sensing ring (403) matches the outer wall of the ring column body (401); The outer end of the base (1) is fixedly connected to a conveying device (5) matching the detection frame (2), and a screw fixing frame is placed on the conveying device (5); It also includes a detection control system, the detection control system includes a processor installed in the detection platform (203), the processor is connected to a detection module, a positioning calibration module, a control module, a data processing module and a visualization module, and the detection frame (2), the laser distance measuring probe (302), the detection column (4) and the transmission device (5) are all connected to the controller signal; The positioning and calibration module is used to calibrate the detection column (4) with the center of the hexagonal hole of the screw to be detected. During the calibration, the horizontal guide rail (202) is controlled to make the detection platform (203) reciprocate for a set distance, and the vertex coordinates of the distance curve measured by the laser distance measuring probe (302) during the reciprocating movement are detected; the transmission device (5) is then controlled to drive the screw fixing frame to reciprocate for a set distance, and the vertex coordinates of the distance curve measured by the laser distance measuring probe (302) during the reciprocating movement are detected, and the vertex coordinates measured twice are used as the calibration positioning point of the detection column (4); When the detection module is in operation, it analyzes whether the hexagon socket hole of the screw is qualified based on the extended length of the electric telescopic rod (204), the distance measured by the laser distance measuring probe (302) and the pressure detected by the pressure sensing ring (403); The visualization module is connected to a display screen, and is used to display whether the screw is qualified and the detection data; when the visualization module displays the detection result, the image recognition module identifies the number of the screw placement hole corresponding to the detected screw.

2. The hexagon socket detection measuring tool for internal angle screw production according to claim 1, characterized in that: The screw fixing frame is provided with a plurality of screw placement holes, and each of the screw placement holes is provided with a number.

3. The hexagon socket detection measuring tool for internal angle screw production according to claim 2 is characterized in that: The wiring plugs (402) are provided as a pair, and the pair of wiring plugs (402) are used for charging and data transmission respectively.

4. The hexagon socket detection measuring tool for internal angle screw production according to claim 3 is characterized in that: An electromagnet column is installed in the hollow clamping rod (301), and a permanent magnet matching the electromagnet column is installed in the ring column body (401).

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