A high-efficiency straightness detection platform fixture and detection method thereof

Abstract

The present invention provides a platform fixture for efficiently detecting straightness and a detection method thereof. The platform fixture includes a workbench for supporting a workpiece to be detected; a micrometer for measuring the straightness of the workpiece, a row of micrometers are installed on the workbench along a straight line, and the probe of the micrometer faces the workpiece; each micrometer is connected to a data processing and display system via a data line; a supporting block is respectively located on the left and right sides of a row of micrometers, and the front end surface of the supporting block and the probe of the micrometer are located on the same straight line, and the workpiece abuts against the front end surface of the supporting block during detection. The present invention solves the problems of low detection efficiency when using a straight ruler to detect straightness, and deformation and wear of the straight ruler, which affect the accuracy of the detection results.

Description

Technical Field

[0001] The invention belongs to the technical field of plate straightness detection, and in particular relates to a high-efficiency straightness detection platform fixture and a detection method thereof. Background Art

[0002] The composite material used in wind turbine blades is pultruded sheet material. The basic requirement of pultruded sheet material is that it cannot be bent or close to a straight effect. After the sheets are stacked, the smaller the gap, the more guaranteed the structural strength of the product. Therefore, the accuracy of the sheet straightness measurement is critical, and it is an important basis for determining whether the product is qualified.

[0003] Our company's patent document with publication number CN208398790U discloses a carbon fiber plate straightness detection tool, including a detection platform, a reference plate is provided on one side of the detection platform along the length direction, the reference plate is perpendicular to the detection platform, and a plurality of universal balls are evenly distributed on the upper surface of the detection platform, and the heights of the plurality of universal balls are consistent. The results measured by the detection tool can more accurately reflect the straightness of the carbon fiber plate itself.

[0004] However, the tooling needs to manually use a feeler gauge and a depth caliper to measure the deformation of the plate, resulting in low detection efficiency.

[0005] In addition, when using a straightness platform that relies on a straight ruler as a supporting reference surface, the straight ruler will still have problems with deformation and wear, affecting the accuracy of the test results.

[0006] Because customers have fixed length measurement standards, the existing platform cannot use an integrated ruler to achieve the required length. The ruler has cumulative deviations due to segmented assembly, resulting in the measurement results not being able to accurately reflect the true value. Moreover, the longer the length, the lower the accuracy.

[0007] In order to improve this problem, it is necessary to integrate the redesign of the fixture and the control and conversion of the automated program to make the measurement process more scientific and efficient and improve the accuracy of the measurement results. Summary of the invention

[0008] The purpose of the present invention is to provide a highly efficient straightness detection platform fixture to solve the problem of low detection efficiency when using a straight ruler to detect straightness, and deformation and wear of the straight ruler, which affects the accuracy of the detection result. Another purpose of the present invention is to provide a detection method for the highly efficient straightness detection platform fixture.

[0009] The present invention provides the following technical solutions:

[0010] A highly efficient straightness detection platform fixture, comprising:

[0011] A workbench, used to support the workpiece to be inspected;

[0012] A micrometer is used to measure the straightness of the workpiece. A row of micrometers is installed on the workbench along a straight line, and the probes of the micrometers face the workpiece. Each of the micrometers is connected to the data processing and display system via a data cable.

[0013] The supporting blocks are respectively located on the left and right sides of a row of micrometers, and the front end surface of the supporting block and the probe of the micrometer are located on the same straight line. During detection, the workpiece abuts against the front end surface of the supporting block.

[0014] Preferably, the probe of the micrometer is cylindrical or wedge-shaped, and the front end of the probe is in line contact with the workpiece along the vertical direction.

[0015] Preferably, a plurality of universal ball bearings are installed on the workbench in front of the micrometer, and rolling friction occurs between the universal ball bearings and the workpiece during loading.

[0016] Furthermore, a verification mechanism is installed on the workbench to verify whether the probes of each micrometer are in the same straight line; the verification mechanism includes a rope body, a bobbin and a fixed block, the bobbin and the fixed block are respectively located on the left and right sides of a row of micrometers, one end of the rope body is fixed on the bobbin, the rope body is tensioned on two supporting blocks and the other end of the rope body is fixedly connected to the fixed block.

[0017] Preferably, the calibration mechanism further includes a dynamometer and a fixed pulley, wherein the fixed pulley is located on the right side of the fixed block, the dynamometer is installed between the fixed block and the fixed pulley, and the rope body is connected to the dynamometer after passing around the fixed pulley, and the dynamometer tightens the rope body with a set tension value.

[0018] Furthermore, an anti-collision mechanism is installed on the workbench in front of the two supporting blocks to prevent the workpiece from accidentally colliding with the probe of the micrometer before contacting the supporting blocks. The anti-collision mechanism includes a baffle and a transmission mechanism. The workbench is provided with a positioning hole adapted to the baffle, and the baffle is raised and lowered along the positioning hole; the transmission mechanism is drivingly connected to the baffle to raise the baffle before detection and lower the baffle during detection.

[0019] Preferably, the transmission mechanism includes a translation drive, a pull rod, a guide block, a cam bearing follower and a transmission column; the translation drive is drivingly connected to the pull rod to drive the pull rod to move in the left and right directions; the guide block is fixed above the pull rod, and the top of the guide block has a slope surface inclined in the left and right directions, the slope surface supports the cam bearing follower and changes the height of the cam bearing follower through rolling friction with the cam bearing follower, the cam bearing follower is installed on the transmission column, and the transmission column is fixed to the bottom of the baffle, and the baffle performs a lifting and lowering action following the translation of the pull rod.

[0020] Preferably, sensing elements are respectively installed on the workbench on the left and right sides of the baffle to detect whether the workpiece is close to the supporting block; the sensing elements are connected to a controller, and the controller is connected to the translation drive member.

[0021] Furthermore, a support frame is installed on the workbench above the micrometer, and a dustproof rolling curtain is installed on the support frame. The dustproof rolling curtain can be pulled outwards to cover the micrometer.

[0022] The above-mentioned detection method of the efficient straightness detection platform fixture comprises the following steps:

[0023] Place the workpiece horizontally on the workbench and push it toward the micrometer;

[0024] When the workpiece triggers the sensing element, the sensing element sends a detection signal to the controller, and after receiving the detection signal, the controller controls the translation drive member to move and lower the baffle;

[0025] Continue to push the workpiece until it abuts against the supporting block; each micrometer measures the distance between it and the workpiece, and the data processing and display system generates a data curve reflecting the deformation of the workpiece, thereby obtaining the straightness of the end face of the workpiece.

[0026] Preferably, before inspecting the workpiece, check whether the probes of each micrometer are in the same straight line, including the following steps: after pulling the rope from the spool, tighten it on two supporting blocks and a fixed pulley in sequence, fasten the end of the rope to a dynamometer, and use the dynamometer to apply a standard tensioning force to the rope at a set tension value; observe whether the straight-line distances between each micrometer and the rope are the same.

[0027] The beneficial effects of the present invention are:

[0028] The present invention uses micrometers arranged along a straight line to replace a flat ruler, thereby overcoming the problem that the flat ruler needs to be spliced ​​due to insufficient length, resulting in large measurement errors. At the same time, the problem that the flat ruler is prone to rust and wear is overcome, eliminating the need for maintenance of the flat ruler. The present invention configures supporting blocks on both sides of the micrometer to quickly and rigidly abut and position the workpiece, thereby improving detection efficiency and detection accuracy, while protecting the probe from being damaged by the impact of the workpiece.

[0029] The measurement result of the present invention is accurate, and there is no need to manually use a feeler gauge or a depth caliper to measure the deformation degree of the plate. The data change of the micrometer can be used to directly generate a corresponding curve through the data processing and display system, thereby improving the detection efficiency.

[0030] The verification mechanism of the present invention can verify whether the probes of each micrometer are on the same straight line before the detection work, so as to prevent the initial values ​​of each micrometer from deviating and improve the detection accuracy. The rope body of the verification mechanism is tensioned on the supporting block and the fixed pulley, and is tightened by the tension meter to form a straight line. If the distances from the probes of the micrometers to the straight line are the same, it means that the probes of the micrometers are all on the same straight line. Among them, the supporting block has the functions of tensioning the rope body and calibrating the straight line.

[0031] The anti-collision mechanism of the present invention prevents the workpiece from accidentally hitting the probe of the micrometer before contacting the supporting block, thereby preventing the probe from being damaged and ensuring the service life of the probe. The baffle of the anti-collision mechanism blocks the probe before starting measurement. When the workpiece triggers the sensing element, the translation drive member lowers the baffle, and then the workpiece moves to the vicinity of the probe for effective measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 is a schematic diagram of a top view of the structure of Embodiment 1 of the present invention;

[0034] Figure 2 is a schematic diagram of the main structure of Embodiment 1 of the present invention;

[0035] Figure 3 is a right view structural schematic diagram of embodiment 1 of the present invention;

[0036] Figure 4 It is a schematic diagram of a micrometer using a cylindrical probe;

[0037] Figure 5 It is a schematic diagram of a micrometer using a wedge-shaped probe;

[0038] Figure 6 is a schematic diagram of a top view of the structure of Embodiment 2 of the present invention;

[0039] Figure 7 is a schematic diagram of the front view structure of the anti-collision mechanism of Example 3 of the present invention;

[0040] Figure 8 Schematic diagram of the installation structure of the dustproof roller shutter according to Embodiment 3 of the present invention;

[0041] Fig. 9 It is a schematic diagram of the top view structure of embodiment 4 of the present invention.

[0042] The markings in the figure are: 1. workbench; 2. micrometer; 3. supporting block; 4. universal ball; 5. data processing and display system; 6. workpiece; 7. rope body; 8. bobbin; 9. dynamometer; 10. fixed pulley; 11. fixed block; 12. baffle; 13. translation drive member; 14. pull rod; 15. guide block; 16. cam bearing follower; 17. transmission column; 18. ramp; 19. limit block; 20. limit wall; 21. sensing element; 22. support frame; 23. dustproof roller shutter. DETAILED DESCRIPTION

[0043] Example 1

[0044] like Figures 1 to 3 As shown, a highly efficient straightness detection platform fixture includes a workbench 1, a micrometer 2, and a supporting block 3.

[0045] The workbench 1 is used to support the workpiece 6 to be tested (such as a pultruded plate); the workbench 1 is supported by a frame, and a cup foot and a roller are installed at the bottom of the frame. A plurality of universal balls 4 are installed on the workbench 1 in front of the micrometer 2. The heights of the universal balls 4 are the same. When loading, the universal balls 4 roll and rub against the workpiece 6 to ensure smooth, flexible and efficient loading.

[0046] The micrometer 2 is used to measure the straightness of the workpiece. A Sivaka 232 interface percentage micrometer can be selected, or other types of micrometers can be selected. A row of micrometers 2 are installed on the workbench 1 along a straight line, and the probes of the micrometers 2 face the workpiece 6; each micrometer 2 is connected to the data processing and display system 5 through a data cable. The data processing and display system 5 can summarize the detection data of the micrometer and automatically generate a chart to display on the interactive interface. The chart uses lines to represent the deformation of the workpiece, which is intuitive and easy to read.

[0047] like Figure 4 and Figure 5 As shown, the micrometer 2 of this embodiment uses a cylindrical or wedge-shaped probe, and the front end of the probe is in line contact with the workpiece in the vertical direction. The commonly used ball-type probe is in point contact with the workpiece, and the contact area is small, which cannot reflect the overall longitudinal structure of the corresponding measuring point on the end face of the workpiece. However, the probe of the tooling is in line contact with the workpiece in the vertical direction, which can accurately reflect the overall longitudinal value at the corresponding measuring point, so the detection result is more accurate.

[0048] The two supporting blocks 3 are respectively located on the left and right sides of the row of micrometers 2, and the front end surface of the supporting block 3 and the probe of the micrometer 2 are located on the same straight line. During inspection, the workpiece 6 rests against the front end surface of the supporting block 3 and will not directly touch the probe, thereby extending the service life of the probe.

[0049] The detection method of this platform fixture is:

[0050] Place the workpiece 6 horizontally on the universal ball 4 of the workbench 1, and push the workpiece toward the micrometer 2;

[0051] When the workpiece 6 moves to abut the supporting block 3, each micrometer 2 measures the distance between it and the workpiece 6, and the data processing and display system 5 generates a data curve representing the deformation of the workpiece, thereby obtaining the straightness of the end face of the workpiece.

[0052] Example 2

[0053] The difference between this embodiment and embodiment 1 is that Figure 6 As shown, a verification mechanism is also installed on the workbench 1 to verify whether the probes of each micrometer are on the same straight line. The verification mechanism includes a rope body 7, a bobbin 8, a dynamometer 9, a fixed pulley 10 and a fixed block 11. The bobbin 8 and the fixed block 11 are respectively located on the left and right sides of a row of micrometers 2. A check bearing is installed in the bobbin 8 to tighten the rope body 7 at any time. The fixed pulley 10 is located on the right side of the fixed block 11, and the dynamometer 9 is installed between the fixed block 11 and the fixed pulley 10. One end of the rope body 7 is fixed on the bobbin 8, and the rope body 7 is tensioned on two supporting blocks 3. After the rope body 7 passes around the fixed pulley 10, it is connected to the dynamometer 9. The dynamometer 9 applies a standard tensioning force to the rope body 7 with a set tension value, so as to facilitate the standardized control of the detection operation. If the probes of each micrometer 2 are all located on the same straight line, after verification, the data curve generated by the data processing display system is a straight line.

[0054] In this embodiment, the supporting block 3 is rotatably mounted on a rotating shaft, and the supporting block 3 itself is in the shape of a cylinder coaxially arranged with the rotating shaft. During the calibration process, when the rope body 7 moves around the supporting block 3, the supporting block 3 can rotate with the rope body 7 to reduce the friction between the two and prevent the supporting block from being worn out after long-term use and affecting the calibration accuracy of the calibration mechanism.

[0055] Example 3

[0056] The difference between this embodiment and embodiment 2 is that Figure 7 and Figure 8 As shown, an anti-collision mechanism is installed on the workbench in front of the two supporting blocks 3 to prevent the workpiece 6 from accidentally hitting the probe of the micrometer 2 before contacting the supporting blocks 3. The anti-collision mechanism includes a baffle 12 and a transmission mechanism. A positioning hole adapted to the baffle 12 is provided on the workbench 1, and the baffle 12 is raised and lowered along the positioning hole; the transmission mechanism is drivingly connected to the baffle 12 to raise the baffle 12 before the detection starts and lower the baffle 12 during the detection process.

[0057] Specifically, the transmission mechanism includes a translation driver 13, a pull rod 14, a guide block 15, a cam bearing follower 16 and a transmission column 17. The translation driver 13 is drivingly connected to the pull rod 14 to drive the pull rod 14 to reciprocate in the left and right directions. The translation driver 13 can be a cylinder or a lead screw. The guide block 15 is welded or screwed on the top of the pull rod 14. The top of the guide block 15 has a slope 18 inclined in the left and right directions. The slope 18 supports the cam bearing follower 16. When the guide block 15 moves left and right, the slope 18 and the cam bearing follower 16 roll and rub against each other, thereby changing the height of the cam bearing follower 16. The cam bearing follower 16 is installed on the transmission column 17 through a rotating shaft. The transmission column 17 is fixed to the bottom of the baffle 12. When the cam bearing follower 16 moves up and down, the baffle 12 moves up and down accordingly.

[0058] Since the baffle 12 is relatively long, in order to improve the balance of the baffle 12 during the lifting process, two sets of guide blocks 15 and cam bearing followers 16 are installed on the pull rod 14 at intervals, and the translation drive 13 synchronously drives the two sets of guide blocks 15 to move, so that the baffle 12 can be lifted and lowered smoothly.

[0059] A limit block 19 is also installed on the pull rod 14. The limit block 19 is provided with a limit wall 20 parallel to the slope 18 of the guide block. The limit wall 20 and the slope 18 together form a limit groove for the cam bearing follower 16 to roll, so as to ensure that the cam bearing follower 16 can be lifted and lowered stably.

[0060] The workbench 1 is provided with sensing elements 21 on the left and right sides of the baffle 12, respectively, for detecting whether the workpiece 6 is close to the supporting block 3. The sensing element 21 can be a micro switch, a proximity switch or a photoelectric sensor, and the sensing element 21 is connected to the controller, and the controller is connected to the translation driver 13. When the workpiece 6 moves to trigger the micro switch, or enters the detection range of the proximity switch / photoelectric sensor, the sensing element 21 sends a detection signal to the controller, and after receiving the detection signal, the controller controls the translation driver 13 to move and lower the baffle 12, so that the workpiece 6 can pass smoothly.

[0061] A support frame 22 is installed above the micrometer 2 on the workbench 1, and a dustproof rolling curtain 23 is installed on the support frame 22. The reel of the dustproof rolling curtain 23 is fixed on the support frame 22. A handle is installed at the free end of the curtain body of the dustproof rolling curtain 23. The curtain body is pulled outward by the handle, and the handle is clamped on the hook on the support frame to be fixed, so that the dustproof rolling curtain 23 covers the micrometer, which has a dustproof effect. The dustproof rolling curtain 23 is made of transparent plastic material, and the dial reading of the micrometer 2 can be clearly obtained through the dustproof rolling curtain 23.

[0062] The detection method of the high-efficiency straightness detection platform fixture comprises the following steps:

[0063] Place the workpiece 6 horizontally on the universal ball 4 of the workbench 1, and push the workpiece toward the micrometer 2;

[0064] When the workpiece 6 triggers the sensing element 21 or enters the detection range of the sensing element 21, the sensing element 21 sends a detection signal to the controller. After receiving the detection signal, the controller controls the translation drive 13 to move and lower the baffle 12, so that the top of the baffle 12 sinks into the positioning hole.

[0065] The workpiece 6 continues to be pushed until the workpiece 6 abuts against the supporting block 3; each micrometer 2 measures the distance between it and the workpiece, and the data processing and display system 5 generates a data curve reflecting the deformation of the workpiece, thereby obtaining the straightness of the end face of the workpiece.

[0066] Example 4

[0067] The difference between this embodiment and embodiment 3 is that Fig. 9 As shown, two sets of anti-collision mechanisms are mirror-mounted on the workbench 1 along the front-to-back direction, so as to achieve double-sided measurement of the workpiece, reduce the number of times the plate is turned over, and improve the detection efficiency.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An efficient straightness detection platform fixture, characterized in that: include: A workbench, used to support the workpiece to be inspected; A micrometer is used to measure the straightness of the workpiece. A row of micrometers is installed on the workbench along a straight line, and the probes of the micrometers face the workpiece. Each micrometer is connected to the data processing and display system through a data cable. The probe of the micrometer is cylindrical or wedge-shaped, and the front end of the probe is in line contact with the workpiece along the vertical direction. The supporting blocks are respectively located on the left and right sides of a row of micrometers, and the front end faces of the supporting blocks and the probes of the micrometers are located on the same straight line, and the workpiece abuts against the front end faces of the supporting blocks when the straightness of the workpiece is detected; An anti-collision mechanism is installed on the workbench in front of the two supporting blocks to prevent the workpiece from accidentally hitting the probe of the micrometer before contacting the supporting blocks. The anti-collision mechanism includes a baffle and a transmission mechanism. A positioning hole adapted to the baffle is provided on the workbench, and the baffle is raised and lowered along the positioning hole. The transmission mechanism is drivingly connected to the baffle to raise the baffle before detection and lower the baffle during detection. The transmission mechanism includes a translation drive, a pull rod, a guide block, a cam bearing follower and a transmission column; the translation drive is drivingly connected to the pull rod to drive the pull rod to move in the left and right directions; the guide block is fixed above the pull rod, and the top of the guide block has a slope surface inclined in the left and right directions, the slope surface supports the cam bearing follower and changes the height of the cam bearing follower through rolling friction with the cam bearing follower, the cam bearing follower is installed on the transmission column, and the transmission column is fixed to the bottom of the baffle, and the baffle performs a lifting and lowering action following the translation of the pull rod.

2. The high-efficiency straightness detection platform fixture according to claim 1 is characterized in that: A plurality of universal balls are installed on the workbench in front of the micrometer, and rolling friction occurs between the universal balls and the workpieces during loading.

3. The high-efficiency straightness detection platform fixture according to claim 1 is characterized in that: A verification mechanism is also installed on the workbench to check whether the probes of each micrometer are in the same straight line; the verification mechanism includes a rope body, a bobbin and a fixed block, the bobbin and the fixed block are respectively located on the left and right sides of a row of micrometers, one end of the rope body is fixed on the bobbin, the rope body is tensioned on two supporting blocks and the other end of the rope body is fixedly connected to the fixed block.

4. The high-efficiency straightness detection platform fixture according to claim 3 is characterized in that: The verification mechanism also includes a dynamometer and a fixed pulley, wherein the fixed pulley is located on the right side of the fixed block, the dynamometer is installed between the fixed block and the fixed pulley, and the rope body is connected to the dynamometer after passing around the fixed pulley, and the dynamometer tightens the rope body with a set tension value.

5. The high-efficiency straightness detection platform fixture according to claim 1 is characterized in that: The workbench is provided with sensing elements on both sides of the baffle for detecting whether the workpiece is close to the supporting block; the sensing elements are connected to a controller, and the controller is connected to the translation driving member.

6. The high-efficiency straightness detection platform fixture according to claim 1 is characterized in that: A support frame is installed on the workbench above the micrometer, and a dustproof rolling curtain is installed on the support frame. The dustproof rolling curtain can be pulled outwards to cover the micrometer.

7. The detection method of the efficient straightness detection platform fixture according to claim 5 is characterized in that: The following steps are involved: Place the workpiece horizontally on the workbench and push it toward the micrometer; When the workpiece enters the detection range of the sensing element and triggers the sensing element, the sensing element sends a detection signal to the controller, and after receiving the detection signal, the controller controls the translation drive member to move and lower the baffle; Continue to push the workpiece until it abuts against the supporting block; each micrometer measures the distance between it and the workpiece, and the data processing and display system generates a data curve reflecting the deformation of the workpiece, thereby obtaining the straightness of the end face of the workpiece.

8. The detection method according to claim 7, characterized in that: A verification mechanism is also installed on the workbench to check whether the probes of each micrometer are in the same straight line; the verification mechanism includes a rope body, a bobbin and a fixed block, a fixed pulley and a dynamometer, the bobbin and the fixed block are respectively located on the left and right sides of a row of micrometers, one end of the rope body is fixed on the bobbin, the rope body is tensioned on two supporting blocks and the other end of the rope body is fixedly connected to the fixed block; the fixed pulley is located on the right side of the fixed block, the dynamometer is installed between the fixed block and the fixed pulley, the rope body is connected to the dynamometer after passing through the fixed pulley, and the dynamometer tightens the rope body with a set tension value; Among them, before inspecting the workpiece, first check whether the probes of each micrometer are in the same straight line, including the following steps: after pulling the rope body out from the spool, tighten it on two supporting blocks and a fixed pulley in sequence, tie the end of the rope body to the dynamometer, and use the dynamometer to apply a standard tensioning force to the rope body at a set value; observe whether the straight-line distances between each micrometer and the rope body are the same.

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