A coil spring flatness detection device

Abstract

The invention relates to a coil spring flatness detection device, comprising a fatigue detection platform, a detection disk is installed on the fatigue detection platform, and a clamping column that slides relatively with the fatigue detection platform is arranged on the outer side of the detection disk; the detection disk comprises a bearing platform, and a clamping block is detachably installed in the middle of the bearing platform; a rotating shaft is rotatably connected in the bearing platform, a stepping motor matching the rotating shaft is installed in the fatigue detection platform, a rotating arm is fixedly connected to the rotating shaft, a laser detector is slidably arranged in the rotating arm through an electric guide rail, an auxiliary detection frame is arranged on the upper side of the fatigue detection platform, the auxiliary detection frame comprises a base, and a docking plate is rotatably connected to the lower end of the base, a laser receiver and a contact sensor are installed in the docking plate, and the detection efficiency is improved by combining contact and non-contact detection, and the detection requirements of different types of coil springs are adapted, and it is easy to evaluate the surface quality change of the coil spring during the coil spring fatigue test.

Description

Technical Field

[0001] The present invention relates to a coil spring flatness detection device, in particular to a coil spring flatness detection device applied to the coil spring detection device. Background Art

[0002] Coil springs, as a common elastic element, can be divided into many types according to their materials, shapes and uses, such as stainless steel coil springs, carbon steel coil springs and special alloy coil springs. These coil springs play an important role in various fields with their unique elasticity and restoring force, such as suspension systems in the automotive industry, connectors in electronic equipment, and doors and windows in the construction industry.

[0003] In the manufacturing process of coil springs, flatness is a crucial indicator, which is directly related to the performance and quality of coil springs. Existing coil spring flatness detection technologies usually use contact or non-contact measurement methods to scan and analyze the surface of coil springs through high-precision instruments to evaluate the flatness of their surfaces. These technologies not only improve detection efficiency, but also greatly reduce human errors and ensure the manufacturing quality of coil springs.

[0004] In order to solve the problem of accuracy in detecting the flatness of coiled springs, a certain detection device on the market adopts a photoelectric sensor detection design and has a certain market share.

[0005] The specification of Chinese invention patent CN109540950B discloses a coil spring internal insertion type metal detector, including a U-shaped frame, a driving rod, a limit plate, a pressing assembly, a movable plate, and a detector; the pressing assembly of the invention includes a driving coil spring, a plug-in rod, and a sliding block, the plug-in rod is inserted into the inner center of the driving coil spring, and the two ends of the plug-in rod are slidably connected in the clamping sliding groove of the limit plate through the sliding block, the driving coil spring is driven to reel and stretch up and down by the plug-in rod, the upper end surface of the movable plate is pressed by the driving coil spring, and the movable plate is driven downward by the driving coil spring, and the lower end of the movable plate is pressed upward by the driving rod.

[0006] Existing coil spring flatness tests are mostly conducted individually, and the test efficiency is low. After the coil spring is produced, fatigue testing is often necessary, and the existing fatigue testing equipment is not easy to detect surface quality changes of the coil spring during the test. Surface quality change detection is mostly carried out before and after fatigue testing, which is not easy to provide sufficient test data for evaluating the quality of the coil spring. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that some fatigue testing devices are not easy to detect the surface quality changes of the coil spring during the test process. The surface quality change detection is mostly carried out before and after the fatigue test, which is not easy to provide sufficient test data for evaluating the quality of the coil spring.

[0008] In order to solve the above problems, the present invention provides a coil spring flatness detection device, comprising a fatigue detection platform, a detection disk is installed on the fatigue detection platform, a clamping column that slides relatively with the fatigue detection platform is provided on the outer side of the detection disk, and the clamping column is used to fix the end of the coil spring; the detection disk comprises a bearing platform, and a clamping block is detachably installed in the middle of the bearing platform; a rotating shaft is rotatably connected in the bearing platform, a stepping motor matching the rotating shaft is installed in the fatigue detection platform, a rotating arm is fixedly connected to the rotating shaft, and a laser detector is slidably arranged in the rotating arm through an electric guide rail;

[0009] An auxiliary detection frame is provided on the upper side of the fatigue detection platform, and a lifting platform is connected between the auxiliary detection frame and the fatigue detection platform. The auxiliary detection frame includes a base, and a docking plate is rotatably connected to the lower end of the base. A first slide groove and a second slide groove are provided in pairs on the docking plate. A laser receiver matching the laser detector is slidably connected in the first slide groove, and an auxiliary motor matching the docking plate is installed on the base;

[0010] A contact sensor is slidably connected in the second slide groove, and an electric slide rail is connected between the laser receiver, the contact sensor and the docking plate; the contact sensor includes a slide table, an electric telescopic column is installed at the side end of the slide table, a detection column is installed at the movable end of the electric telescopic column, and a pressure sensor is arranged on the surface of the detection column; an image acquisition device is installed at the lower end of the docking plate.

[0011] In the above coil spring flatness detection device, accurate detection and evaluation of the coil spring flatness is achieved during fatigue testing.

[0012] As a further improvement of the present application, the upper surface of the laser detector is fitted with a supporting platform, and the supporting platform includes a cylindrical bracket connected to the fatigue detection platform, and a light-transmitting plate matching the auxiliary detection frame is installed on the cylindrical bracket.

[0013] As a further improvement of the present application, a shaft column is passed through the rotating shaft, the top end of the shaft column passes through the supporting platform and is clamped with the clamping block, an electric motor matching the shaft column is installed in the fatigue testing platform, and the power output end of the stepper motor is connected to the rotating shaft through a transmission belt.

[0014] As a further improvement of the present application, the laser detector is mounted with any one of a laser beam emitter and a laser grating emitter.

[0015] As another improvement of the present application, an LED light ring is installed on the inner wall of the supporting platform.

[0016] As another improvement of the present application, the outer end of the bearing platform is rotatably connected to an arc-shaped toothed plate fixedly connected to the clamping column, the fatigue testing platform is rotatably connected to a driving gear meshing with the outer end of the arc-shaped toothed plate, and the lower end of the fatigue testing platform is equipped with a motor connected to the driving gear;

[0017] As another improvement of the present application, a detection control system is also included, the detection control system includes a processor, and the processor is connected to a control module, an identification module, a path module and a data processing module;

[0018] The control module is used to adjust the rotation speed of the rotating arm and the docking plate, the sliding position of the laser detector, the laser receiver and the contact sensor, and the lifting height of the auxiliary detection frame according to the instructions of the processor;

[0019] The recognition module is connected to the image acquisition device, and the recognition module determines the model and size information of the coil spring through image recognition; the recognition result provides data support for the subsequent detection path design;

[0020] The path module plans the detection path of the laser detector and the contact sensor according to the data provided by the recognition module; when designing the detection path, it is ensured that the laser beam emitted by the laser detector passes through the selected coil surface area, which includes the inner surface and the outer surface;

[0021] The data processing module processes and analyzes the detection data received from the laser receiver and the contact sensor, and extracts the flatness information of the coil spring.

[0022] As another improved supplement of the present application, when the laser detector performs detection along the detection path, the laser receiver moves synchronously with the laser detector.

[0023] In summary, this scheme improves the detection efficiency by combining contact and non-contact detection, and adapts to the detection needs of different types of coil springs. It is also easy to evaluate the changes in the surface quality of coil springs during coil spring fatigue testing, providing data support for the production and quality control of coil springs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a stereogram of the first and second embodiments of the present application;

[0025] Figure 2 This is a three-dimensional diagram of the first and second embodiments of the present application when performing detection work;

[0026] Figure 3 It is a top view of the cross section of the clamping column of the first and second embodiments of the present application;

[0027] Figure 4 This is a front cross-sectional view of the docking trays of the first and second embodiments of the present application after docking;

[0028] Figure 5 for Figure 4 The structural diagram at A in the middle;

[0029] Figure 6 for Figure 4The structural diagram at B in the middle;

[0030] Figure 7 It is a side cross-sectional view of the first and second embodiments of the present application;

[0031] Figure 8 This is a system block diagram of the first and second implementation modes of the present application.

[0032] Description of the numbers in the figure:

[0033] 1 fatigue test table, 2 test plate, 21 bearing table, 22 block, 23 rotating shaft, 24 rotating arm, 25 laser detector, 3 card column, 4 auxiliary test frame, 41 base, 42 docking plate, 43 electric slide rail, 5 laser receiver, 6 contact sensor, 61 slide table, 62 electric telescopic column, 7 test column, 8 axis column. DETAILED DESCRIPTION

[0034] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0035] The first implementation method:

[0036] Figure 1-7 A coil spring flatness detection device is shown, comprising a fatigue detection platform 1, a detection plate 2 is mounted on the fatigue detection platform 1, and a clamping column 3 is provided on the outer side of the detection plate 2 to slide relative to the fatigue detection platform 1; the clamping column 3 is used to fix the end of the coil spring, and the clamping column 3 is a device for fixing the end of the coil spring in the prior art. A person skilled in the art selects a suitable device in the prior art for installation to achieve the function of fixing the end of the coil spring;

[0037] The testing plate 2 includes a carrier 21, and a block 22 is detachably mounted in the middle of the carrier 21; a rotating shaft 23 is rotatably connected in the carrier 21, a stepping motor matching the rotating shaft 23 is installed in the fatigue testing platform 1, a rotating arm 24 is fixedly connected to the rotating shaft 23, and a laser detector 25 is slidably arranged in the rotating arm 24 through an electric guide rail;

[0038] An auxiliary detection frame 4 is provided on the upper side of the fatigue detection platform 1, and a lifting platform is connected between the auxiliary detection frame 4 and the fatigue detection platform 1. The auxiliary detection frame 4 includes a base 41, and a docking plate 42 is rotatably connected to the lower end of the base 41. The docking plate 42 is provided with a first slide groove and a second slide groove in pairs, and a laser receiver 5 matching the laser detector 25 is slidably connected in the first slide groove; any one of a laser beam emitter and a laser grating emitter is installed on the laser detector 25; an auxiliary motor matching the docking plate 42 is installed on the base 41, and the auxiliary motor works synchronously with the stepping motor;

[0039] A contact sensor 6 is slidably connected in the second slide groove, and an electric slide rail 43 is connected between the laser receiver 5 and the contact sensor 6 and the docking plate 42; the contact sensor 6 includes a slide table 61, and an electric telescopic column 62 is installed at the side end of the slide table 61, and a detection column 7 is installed at the movable end of the electric telescopic column 62, and a pressure sensor is arranged on the surface of the detection column 7; an image acquisition device is installed at the lower end of the docking plate 42, and the image acquisition device takes a picture of the coil spring from above to acquire a top view image of the coil spring.

[0040] The upper surface of the laser detector 25 is in contact with the support platform 21 . The support platform 21 includes a cylindrical bracket connected to the fatigue detection platform 1 . A light-transmitting plate matching the auxiliary detection frame 4 is installed on the cylindrical bracket.

[0041] Optionally, a shaft column 8 is passed through the rotating shaft 23, and the shaft column 8 and the rotating shaft 23 are connected by bearings and rotate relative to each other. The top of the shaft column 8 passes through the supporting platform 21 and is clamped with the clamping block 22. An electric motor matching the shaft column 8 is installed in the fatigue testing platform 1, and the power output end of the stepper motor is connected to the rotating shaft 23 through a transmission belt. After the inner end of the coil spring is fixed to the clamping block 22, the clamping block 22 is driven to rotate by the shaft column 8 to realize the curling of the coil spring, which is easy to adapt to the detection of different types of coil springs.

[0042] The outer end of the carrier 21 is rotatably connected to an arc-shaped toothed plate 31 fixedly connected to the clamping column 3, and the fatigue testing platform 1 is rotatably connected to a driving gear 32 meshing with the outer end of the arc-shaped toothed plate 31, and a motor connected to the driving gear 32 is installed at the lower end of the fatigue testing platform 1; the device rotates the driving gear 32, thereby causing the arc-shaped toothed plate 31 to drive the clamping column 3 to swing back and forth, so that the coil spring to be tested is stretched and reset, so as to perform fatigue testing of the coil spring;

[0043] An LED light ring is installed on the inner wall of the support platform 21, and the LED light ring is used for supplementary lighting during image acquisition, so as to ensure that the laser detector 25 and the contact sensor 6 can accurately capture the morphological characteristics of the coil spring.

[0044] When the present solution is used for detection, the coil spring to be detected is placed on the carrier 21, the outer end of the coil spring is fixed by the clamping column 3, and the lifting platform is controlled to work so that the docking plate 42 is close to the coil spring. At this time, the image acquisition device performs image acquisition. During the docking process, the docking plate 42 rotates until the laser receiver 5 matches the laser detector 25, that is, the laser beam emitted by the laser receiver 5 is vertically incident on the photosensitive area of ​​the laser detector 25;

[0045] When the laser detector 25 detects along the detection path, the laser receiver 5 moves synchronously with the laser detector 25; that is, during the detection process, the laser receiver 5 and the laser detector 25 maintain a matching state and rotate and move synchronously, that is, the docking plate 42 and the rotating arm 24 rotate synchronously, and the electric guide rail and the electric slide rail 43 synchronously drive the laser receiver 5 and the laser detector 25 to move;

[0046] This solution controls the sliding of the electric guide rail so that the laser detector 25 can scan along the surface of the coil spring according to a preset detection path; the light beams emitted by the laser beam emitter and the laser grating emitter pass through the light-transmitting plate and then the surface of the coil spring and are received by the laser receiver 5, thereby realizing non-contact detection of the flatness of the coil spring.

[0047] The operation of the electric slide rail is adjusted through the control module so that the detection column 7 on the contact sensor 6 can be close to the surface of the coil spring for detection; the pressure sensor on the detection column 7 can sense the size of the contact force in real time to detect whether the surface of the coil spring is flat, thereby realizing contact detection of the flatness of the coil spring.

[0048] The contact detection and non-monitoring detection of this solution are both performed when the coil spring is reset to the initial state.

[0049] The second implementation method:

[0050] Figure 8 As shown, it also includes a detection control system, which includes a processor, and the processor is connected to a control module, an identification module, a path module and a data processing module;

[0051] The control module is used to adjust the rotation speed of the rotating arm 24 and the docking plate 42, the sliding positions of the laser detector 25, the laser receiver 5 and the contact sensor 6, and the lifting height of the auxiliary detection frame 4 according to the instructions of the processor; the lifting height is determined according to the coil spring model obtained by image recognition, and after the auxiliary detection frame 4 is lowered, it is ensured that the lower surface of the docking plate 42 is in contact with the surface of the coil spring but no pressure is applied thereto;

[0052] The recognition module is connected to the image acquisition device, and the recognition module determines the model and size information of the coil spring through image recognition; the recognition result provides data support for the subsequent detection path design; the recognized coil spring image includes a top view image of the coil spring, a route map of the inner surface of the coil spring, and a route map of the outer surface of the coil spring;

[0053] The path module plans the detection path of the laser detector 25 and the contact sensor 6 according to the data provided by the recognition module; when designing the detection path, it is ensured that the laser beam emitted by the laser detector 25 passes through the selected surface area of ​​the coil, and the surface area includes the inner surface and the outer surface;

[0054] It should be noted that when designing the detection path, the distance between the laser beam emitted by the laser detector 25 and the surface of the coil spring in the uncurled state is preset; and when designing the detection path of the contact sensor 6, it is necessary to ensure that the detection column 7 is in contact with the surface of the coil spring in the uncurled state; the laser detector 25 and the contact sensor 6 are used to detect the flatness along the surface of the coil spring, and when the laser beam is offset or the surface of the detection column 7 is partially compressed, the change in the flatness of the coil spring surface can be quickly determined; and the change in the flatness of the coil spring surface can be detected during the coil spring fatigue test;

[0055] The data processing module processes and analyzes the detection data received from the laser receiver 5 and the contact sensor 6 to extract the flatness information of the coil spring;

[0056] Specifically, for contact monitoring, when the detection value of the pressure sensor on the detection column 7 is greater than the set value, it is judged that the surface of the point is uneven. When the detection exceeds the set number of uneven points, it is judged that the surface of the detected coil spring is uneven;

[0057] For non-contact monitoring, when the surface of the coil spring is uneven, its raised area will block the laser beam, causing the laser to be refracted or deflected. When the laser receiver 5 receives the oblique incident laser or does not receive the laser, it is judged that the surface of the point is uneven. When the detection exceeds the set number of uneven points, it is judged that the detected coil spring surface is uneven.

[0058] During the intermittent flatness test of the coil spring, if there are continuous uneven points and they exceed the maximum set value, the detection work will be suspended and the system will give an alarm. The technicians will judge whether the coil spring is fatigue-failed. If it is not failed, the image recognition will be re-performed, the detection path will be re-generated, and the technicians will calibrate and confirm before continuing the detection work.

[0059] When the coil spring is not fatigue tested and only the flatness is tested by the device, if there are continuous uneven points and they exceed the maximum set value, the system will give an alarm, re-perform image recognition, and regenerate the detection path. After calibration and confirmation by technicians in the field, the detection work will be repeated.

[0060] The detection control system of this embodiment realizes accurate detection and evaluation of the flatness of the coil spring through the coordinated work of each module. The functional design of each module is closely combined with the actual structure of the detection device, ensuring the smooth progress of the detection process and the accuracy of the detection results.

[0061] In summary, this scheme improves the detection efficiency by combining contact and non-contact detection, and adapts to the detection needs of different types of coil springs. It is also easy to evaluate the changes in the surface quality of coil springs during coil spring fatigue testing, providing data support for the production and quality control of coil springs.

[0062] 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 coil spring flatness detection device, comprising a fatigue detection platform (1), a detection plate (2) being mounted on the fatigue detection platform (1), a clamping column (3) being provided on the outer side of the detection plate (2) and being slidable relative to the fatigue detection platform (1), the clamping column (3) being used to fix the end of the coil spring; characterized in that: The detection plate (2) comprises a bearing platform (21), a clamping block (22) being detachably mounted in the middle of the bearing platform (21); a rotating shaft (23) is rotatably connected in the bearing platform (21), a stepping motor matching the rotating shaft (23) is mounted in the fatigue detection platform (1), a rotating arm (24) is fixedly connected to the rotating shaft (23), and a laser detector (25) is slidably mounted in the rotating arm (24) via an electric guide rail; An auxiliary detection frame (4) is provided on the upper side of the fatigue detection platform (1), a lifting platform is connected between the auxiliary detection frame (4) and the fatigue detection platform (1), the auxiliary detection frame (4) comprises a base (41), a docking plate (42) is rotatably connected to the lower end of the base (41), a first slide groove and a second slide groove are provided in pairs on the docking plate (42), a laser receiver (5) matching the laser detector (25) is slidably connected in the first slide groove, and an auxiliary motor matching the docking plate (42) is installed on the base (41); A contact sensor (6) is slidably connected in the second slide groove, and an electric slide rail (43) is connected between the laser receiver (5) and the contact sensor (6) and the docking plate (42); the contact sensor (6) comprises a slide table (61), a side end of the slide table (61) is mounted with an electric telescopic column (62), a movable end of the electric telescopic column (62) is mounted with a detection column (7), and a pressure sensor is arranged on the surface of the detection column (7); an image acquisition device is mounted at the lower end of the docking plate (42).

2. A coil spring flatness detection device according to claim 1, characterized in that: The upper surface of the laser detector (25) is in contact with the support platform (21), and the support platform (21) comprises a cylindrical bracket connected to the fatigue detection platform (1), and a light-transmitting plate matching the auxiliary detection frame (4) is installed on the cylindrical bracket.

3. A coil spring flatness detection device according to claim 1, characterized in that: A shaft column (8) is inserted into the rotating shaft (23), the top end of the shaft column (8) passes through the bearing platform (21) and is clamped with the clamping block (22), an electric motor matching the shaft column (8) is installed in the fatigue detection platform (1), and the power output end of the stepping motor is connected to the rotating shaft (23) via a transmission belt.

4. A coil spring flatness detection device according to claim 1, characterized in that: Any one of a laser beam emitter and a laser grating emitter is installed on the laser detector (25).

5. The coil spring flatness detection device according to claim 1, characterized in that: An LED light ring is installed on the inner wall of the supporting platform (21).

6. A coil spring flatness detection device according to claim 1, characterized in that: The outer end of the bearing platform (21) is rotatably connected to an arc-shaped toothed plate (31) fixedly connected to the clamping column (3), the fatigue testing platform (1) is rotatably connected to a driving gear (32) meshing with the outer end of the arc-shaped toothed plate (31), and the lower end of the fatigue testing platform (1) is equipped with an electric motor connected to the driving gear (32).

7. A coil spring flatness detection device according to claim 1, characterized in that: Also included is a detection control system, which includes a processor, to which a control module, an identification module, a path module and a data processing module are connected; The control module is used to adjust the rotation speed of the rotating arm (24) and the docking plate (42), the sliding position of the laser detector (25), the laser receiver (5) and the contact sensor (6), and the lifting height of the auxiliary detection frame (4) according to the instructions of the processor; The recognition module is connected to the image acquisition device, and the recognition module determines the model and size information of the coil spring through image recognition; the recognition result provides data support for the subsequent detection path design; The path module plans the detection path of the laser detector (25) and the contact sensor (6) according to the data provided by the recognition module; when designing the detection path, it is ensured that the laser beam emitted by the laser detector (25) passes through the selected surface area of ​​the coiled tube, the surface area including the inner surface and the outer surface; The data processing module processes and analyzes the detection data received from the laser receiver (5) and the contact sensor (6), and extracts the flatness information of the coil spring.

8. A coil spring flatness detection device according to claim 7, characterized in that: When the laser detector (25) performs detection along the detection path, the laser receiver (5) moves synchronously with the laser detector (25).

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