A precision detection device and method for a numerical control rotary table

Abstract

The application relates to the technical field of precision detection, in particular to a precision detection device and method for a numerical control rotary table, which comprises a dustproof outer frame, a first square opening is formed through the bottom of the dustproof outer frame, a second square opening is formed through the bottom of the dustproof outer frame, and a detection part is slidably arranged in the first square opening. The driving part drives the coarse adjustment part to operate, the guide part and the switching part are pushed downward, the switching part drives the detection part to move downward, the detection part is coarsely adjusted, when the bottom of the guide part contacts the top of the triggering part, the switching part moves to the right, so that the downward pushing force of the coarse adjustment part on the switching part is transferred to the fine adjustment part, the guide part, the switching part and the detection part are finely adjusted downward through the fine adjustment part, compared with the prior art, manual switching between coarse adjustment and fine adjustment is not needed, the convenience degree is greatly improved, the detection efficiency is improved, and the detection capacity is improved.

Description

Technical Field

[0001] This invention relates to the field of precision testing technology, specifically to a precision testing device and method for CNC rotary tables. Background Technology

[0002] The CNC rotary table is an important accessory in CNC machine tools, an indispensable auxiliary machine for floor-type milling machines, end milling machines, and other similar machines. It is primarily suited for continuous rotary machining and multi-face machining of plate and box-shaped workpieces, and has wide applications in machinery manufacturing, aerospace, and automotive manufacturing. To ensure the accuracy of the CNC rotary table, it undergoes precision testing before leaving the factory.

[0003] According to a Chinese patent application with publication number CN118328823A, a precision testing device and method for CNC rotary tables are disclosed. The device achieves rapid shortening of the distance between the dial indicator head and the testing point through coarse adjustment, and combines fine adjustment to make the dial indicator head contact the testing point. This avoids the problem of the dial indicator head dropping sharply, which may cause damage or inaccurate testing data. This improves the measurement accuracy of the flatness of the CNC rotary table. Moreover, this testing operation method has low requirements for the worker's proficiency and skills, and is relatively easy for workers to learn.

[0004] The aforementioned device requires the operator to visually determine the distance between the dial indicator probe and the CNC rotary table, and to manually switch between coarse and fine adjustments. This method is difficult to use and not very convenient, demanding a high degree of coordination between the operator's eyes and hands. However, differences in operator skill may lead to premature switching from coarse to fine adjustments, wasting adjustment time. Conversely, switching too late may cause the dial indicator probe to come into rapid contact with the CNC rotary table, resulting in damage or inaccurate data. Therefore, we propose a precision testing device and method for CNC rotary tables to address these technical problems. Summary of the Invention

[0005] This invention provides the following technical solution: a precision testing device for a CNC rotary table, comprising:

[0006] A dustproof outer frame, wherein a first square opening is provided through the bottom of the dustproof outer frame, and a second square opening is provided through the bottom of the dustproof outer frame;

[0007] The detection unit is slidably provided inside the first square opening, and the detection unit is used for CNC rotary table accuracy detection;

[0008] A triggering part is slidably provided inside the second square opening, and the triggering part is used to protect the detection part;

[0009] A guide section is slidably provided inside the dustproof outer frame, and the guide section is used for the up and down adjustment of the detection section;

[0010] A coarse adjustment section is provided inside the dustproof outer frame, which is used for coarse adjustment of the detection section.

[0011] A fine-tuning section is provided inside the dustproof outer frame for fine adjustment of the detection section.

[0012] The switching part is slidably provided inside the guide part, and the switching part is used for automatic switching between coarse adjustment and fine adjustment;

[0013] The positioning part is rotatably provided on the back of the dustproof outer frame. The positioning part extends movably into the interior of the dustproof outer frame and is used for positioning the trigger part.

[0014] The top of the dustproof outer frame is rotatably provided with a drive unit, which extends movably into the interior of the dustproof outer frame. The drive unit is used to drive the coarse adjustment unit and the fine adjustment unit.

[0015] As a preferred embodiment of the present invention, the detection unit includes:

[0016] An adjustment frame is slidably installed inside the first square opening. The bottom of the adjustment frame is bent at a forward right angle. A dial indicator is fixedly installed at the end of the horizontal section of the adjustment frame. The adjustment frame is used for adjusting the dial indicator up and down.

[0017] A push guide seat is fixedly installed on the top of the adjustment frame, and a thrust groove is opened through the front of the push guide seat.

[0018] As a preferred embodiment of the present invention, the triggering unit includes:

[0019] A trigger rod is slidably installed inside the second square opening. A U-shaped observation frame is fixedly installed at the bottom of the adjustment frame, and the U-shaped observation frame is located at the bottom of the dial gauge.

[0020] A trigger block is fixedly installed on the top of the trigger rod.

[0021] As a preferred embodiment of the present invention, the guide portion includes:

[0022] A guide frame is located inside a dustproof outer frame. Two path grooves are provided on the left and right sides of the dustproof outer frame. Two linear sliders are fixedly installed on the left and right sides of the guide frame. The linear sliders are slidably connected to the path grooves and are used for guiding the guide frame up and down.

[0023] The guide frame has two spring fixing brackets fixedly installed at the top right end, one in front and one behind, and tension springs are fixedly installed on the periphery of each of the two spring fixing brackets.

[0024] As a preferred embodiment of the present invention, the coarse adjustment section includes:

[0025] The first rotating bracket has two components, and the two first rotating brackets are respectively fixedly installed on the top wall and bottom wall of the dustproof outer frame. A coarse thread screw is rotatably installed between the two first rotating brackets. The coarse thread screw is provided with a semi-circular coarse thread sleeve on its periphery. The coarse thread screw is used to push the semi-circular coarse thread sleeve to move up or down.

[0026] The fine-tuning section includes:

[0027] The second rotating bracket has two parts, and the two second rotating brackets are respectively fixedly installed on the top wall and bottom wall of the dustproof outer frame. A fine-toothed screw is rotatably installed between the two second rotating brackets. The fine-toothed screw is provided with a semi-circular fine wire sleeve on its periphery. The fine-toothed screw is used to push the semi-circular fine wire sleeve to move up or down.

[0028] As a preferred embodiment of the present invention, the switching unit includes:

[0029] The switching platform is slidably installed inside the guide frame. A clearance groove is provided through the top of the switching platform. Arc-shaped assembly grooves are provided at both the left and right ends of the switching platform. A semi-circular coarse wire sleeve is fixedly installed inside the arc-shaped assembly groove at the left end of the switching platform, and a semi-circular fine wire sleeve is fixedly installed inside the arc-shaped assembly groove at the right end of the switching platform.

[0030] A pusher frame is fixedly installed at the bottom front end of the switching platform, and a pusher rod is fixedly installed on the front of the pusher frame. The pusher rod is slidably installed inside the thrust groove.

[0031] As a preferred embodiment of the present invention, the switching unit further includes:

[0032] An elastic latch is fixedly installed at the bottom of the switching station. The elastic latch is located at the top of the trigger block and at the right end of the clearance groove.

[0033] A limiting angle iron is fixedly installed on the back of the guide frame. The bottom of the limiting angle iron is bent at a forward right angle. The right end of the elastic latch is engaged with the left end of the limiting angle iron.

[0034] Positioning posts: Two positioning posts are fixedly installed at the top right end of the switching platform, distributed front and back. The two positioning posts are respectively fixedly connected to the left ends of two tension springs.

[0035] A gripping bar is fixedly installed at the top left end of the switching platform, and the gripping bar moves through the path groove on the left wall of the dustproof outer frame.

[0036] As a preferred embodiment of the present invention, the positioning part includes:

[0037] A positioning screw is rotatably mounted on the back of the dustproof outer frame. The positioning screw extends movably into the interior of the dustproof outer frame. A positioning pressure plate is threadedly connected to the outer periphery of the positioning screw. The front of the positioning pressure plate abuts against the back of the trigger rod. The positioning pressure plate is used for the up and down positioning of the trigger rod.

[0038] A positioning handwheel is fixedly installed at the rear end of the positioning screw.

[0039] As a preferred embodiment of the present invention, the driving unit includes:

[0040] A drive handwheel is rotatably mounted on the top of the dustproof outer frame. A drive shaft is fixedly mounted on the bottom of the drive handwheel. The drive shaft movably passes through the top of the dustproof outer frame and is rotatably connected to the top of the dustproof outer frame. A drive gear is fixedly mounted on the bottom of the drive shaft. Two driven gears distributed on the left and right mesh around the drive gear. The two driven gears are fixedly connected to the top of the coarse-pitch screw and the top of the fine-pitch screw, respectively.

[0041] A method for using a precision testing device for a CNC rotary table includes the following steps:

[0042] S1. The device is fixed by the fixing bracket set on the back of the dustproof outer frame;

[0043] S2. After the positioning part releases the positioning effect on the trigger part, adjust the trigger rod up and down to adjust the bottom height of the U-shaped observation frame to be slightly higher than the top height of the CNC turntable, and then lock the trigger part in place through the positioning part.

[0044] S3. The coarse adjustment part and the fine adjustment part are driven by the drive unit to move, so that the coarse thread screw drives the semi-circular coarse thread sleeve to move downward, pushing the guide part and the switching part downward. The downward movement of the switching part pushes the detection part downward, thus performing coarse adjustment.

[0045] S4. When the switching unit moves downward, the bottom of the elastic latch touches the top of the trigger block. The trigger block pushes the elastic latch upward, and the rebound force of the two tension springs pulls the switching table to the right along the guide frame, causing the semi-circular coarse thread sleeve to separate from the coarse thread screw and the semi-circular fine thread sleeve to engage with the fine thread screw. Subsequently, the rotation of the fine thread screw drives the semi-circular fine thread sleeve to move downward, thereby pushing the guide unit and the switching unit downward. The downward movement of the switching unit pushes the detection unit downward, thereby automatically making fine adjustments to the detection unit.

[0046] Compared with the prior art, the beneficial effects of the present invention are:

[0047] 1. In this invention, the coarse adjustment unit is driven by the drive unit to operate, which pushes the guide unit and the switching unit downward. The downward push of the switching unit causes the detection unit to move downward together, thus coarsely adjusting the detection unit. When the bottom of the guide unit contacts the top of the trigger unit, the switching unit moves to the right, thereby transferring the downward thrust of the coarse adjustment unit on the switching unit to the fine adjustment unit. The fine adjustment unit then finely adjusts the guide unit, the switching unit, and the detection unit downward. Compared with the prior art, there is no need for manual switching between coarse and fine adjustment, which greatly improves the ease of use, increases the efficiency of detection, and helps to increase detection capacity.

[0048] 2. In this invention, by adjusting the trigger rod of the triggering part up and down, the bottom height of the U-shaped observation frame can be adjusted within a wide range, making the device suitable for measuring the surface accuracy of CNC turntables of different specifications, thus making it highly practical.

[0049] 3. In this invention, by pulling the grip lever to the left, the switching platform is pulled to the left along the inside of the guide frame, causing the elastic latch to move back to the left end of the limiting angle iron, so that its right end is engaged with the left end of the limiting angle iron again. At the same time, the leftward movement of the switching platform causes the two tension springs to elastically stretch again, providing elastic potential energy for the switching platform to move to the right, waiting for the next test. The reset operation is simple and easy to learn. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the left front view structure of the present invention;

[0051] Figure 2 This is a schematic diagram of the left rear view structure of the present invention;

[0052] Figure 3 This is a front cross-sectional view of the dustproof outer frame in this invention;

[0053] Figure 4 In this invention Figure 3 A magnified structural diagram of part A;

[0054] Figure 5 This is a schematic diagram of the coarse adjustment section and the fine adjustment section in this invention;

[0055] Figure 6 This is a schematic diagram of the drive unit in the present invention;

[0056] Figure 7 This is a schematic diagram of the bottom view structure of the switching part in this invention;

[0057] Figure 8 In this invention Figure 7 A schematic diagram of the enlarged structure of part B;

[0058] Figure 9 This is a schematic diagram of the bottom view structure of the guide part in this invention;

[0059] Figure 10 This is a detailed structural diagram of the switching unit in this invention;

[0060] Figure 11 This is a schematic diagram of the detection unit in the present invention;

[0061] Figure 12 This is a schematic diagram of the triggering part and the positioning part in this invention.

[0062] In the diagram: 100, dustproof outer frame; 101, first square opening; 102, second square opening; 103, path groove; 200, detection unit; 201, adjustment frame; 202, dial indicator; 203, push guide seat; 204, thrust groove; 300, trigger unit; 301, trigger rod; 302, U-shaped observation frame; 303, trigger block; 400, guide unit; 401, guide frame; 402, linear slider; 403, spring fixing frame; 404, tension spring; 500, coarse adjustment unit; 501, first rotating bracket; 502, coarse thread screw; 503, semi-circular coarse thread sleeve; 600. Fine adjustment section; 601, second rotating bracket; 602, fine thread screw; 603, semi-circular fine thread sleeve; 700, switching section; 701, switching table; 7001, clearance groove; 702, arc-shaped assembly groove; 703, push guide frame; 704, push guide rod; 706, elastic latch; 707, limiting angle iron; 708, positioning post; 709, gripping rod; 800, positioning section; 801, positioning screw; 802, positioning pressure plate; 803, positioning handwheel; 900, drive section; 901, drive handwheel; 902, drive shaft; 903, driving gear; 904, driven gear. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] The technical solution provided by this invention specifically includes the following embodiments:

[0065] Reference Figures 1-12 As shown:

[0066] A precision testing device for a CNC rotary table includes a dustproof outer frame 100. A first square opening 101 and a second square opening 102 are provided through the bottom of the dustproof outer frame 100. A detection unit 200 is slidably disposed inside the first square opening 101 for precision testing of the CNC rotary table. A trigger unit 300 is slidably disposed inside the second square opening 102 for protecting the detection unit 200. A guide unit 400 is slidably disposed inside the dustproof outer frame 100. A coarse adjustment unit 500 is rotatably disposed inside the dustproof outer frame 100 for coarse adjustment of the detection unit 200. The dustproof outer frame 100 has a fine adjustment part 600 inside, which is used for fine adjustment of the detection part 200. The guide part 400 has a switching part 700 inside, which is used for automatic switching between coarse and fine adjustment. The back of the dustproof outer frame 100 has a positioning part 800, which extends movably into the interior of the dustproof outer frame 100 and is used for positioning the trigger part 300. The top of the dustproof outer frame 100 has a drive part 900, which extends movably into the interior of the dustproof outer frame 100 and is used for driving the coarse adjustment part 500 and the fine adjustment part 600.

[0067] The trigger unit 300 is adjusted up and down according to the height of the CNC rotary table. After adjustment, the trigger unit 300 is positioned up and down by the positioning unit 800 to prevent the trigger unit 300 from moving again. The coarse adjustment unit 500 is driven by the drive unit 900 to push the guide unit 400 and the switching unit 700 downward. The downward push of the switching unit 700 causes the detection unit 200 to move downward together to perform coarse adjustment of the detection unit 200. When the bottom of the guide unit 400 contacts the top of the trigger unit 300, the switching unit 700 moves to the right, thereby transferring the downward thrust of the coarse adjustment unit 500 on the switching unit 700 to the fine adjustment unit 600. The fine adjustment unit 600 performs fine adjustment of the guide unit 400, the switching unit 700 and the detection unit 200 downward.

[0068] Reference Figures 3-5 as well as Figure 11 As shown: The detection unit 200 includes:

[0069] Adjustment frame 201 is slidably installed inside the first square opening 101. The bottom of adjustment frame 201 is set in a forward right-angle bend. A dial indicator 202 is fixedly installed at the end of the horizontal section of adjustment frame 201. Adjustment frame 201 is used for the up and down adjustment of dial indicator 202.

[0070] The pusher seat 203 is fixedly installed on the top of the adjustment frame 201. The pusher seat 203 has a thrust groove 204 through the front.

[0071] Specifically, by placing the adjustment frame 201 inside the first square opening 101, the adjustment frame 201 can move up and down more stably and smoothly, ensuring the overall stability of the adjustment frame 201. By pushing the adjustment frame 201 downward, the dial indicator 202 is moved down together, so that the measuring needle of the dial indicator 202 gradually approaches the top of the CNC turntable until the bottom of the measuring needle of the dial indicator 202 contacts the top of the CNC turntable, and the surface of the CNC turntable is measured with precision.

[0072] Reference Figures 3 to 10 as well as Figure 12 As shown:

[0073] The trigger unit 300 includes:

[0074] A trigger rod 301 is slidably installed inside the second square opening 102 and is located on the back of the adjustment frame 201; a U-shaped observation frame 302 is fixedly installed at the bottom of the trigger rod 301 and is located at the bottom of the dial gauge 202.

[0075] Trigger block 303 is fixedly installed on the top of trigger rod 301.

[0076] By sliding the trigger rod 301 inside the second square opening 102, the up and down movement of the trigger rod 301 can be made more stable and smooth, ensuring the stability of the trigger rod 301 when adjusting up and down. By adjusting the position of the trigger rod 301 up and down, the bottom of the U-shaped observation frame 302 can be adjusted to be slightly higher than the top of the CNC turntable.

[0077] The guide unit 400 includes:

[0078] Guide frame 401 is located inside the dustproof outer frame 100. Two path grooves 103 distributed front and back are opened on the left and right sides of the dustproof outer frame 100. Two linear sliders 402 distributed front and back are fixedly installed on the left and right sides of the guide frame 401. The linear sliders 402 are slidably connected to the path grooves 103 for guiding the guide frame 401 up and down.

[0079] Two spring fixing brackets 403 are fixedly installed at the top right end of the guide frame 401, and tension springs 404 are fixedly installed on the periphery of both spring fixing brackets 403.

[0080] The coarse adjustment section 500 includes:

[0081] There are two first rotating brackets 501, and the two first rotating brackets 501 are respectively fixedly installed on the top wall and bottom wall of the dustproof outer frame 100. A coarse thread screw 502 is rotatably installed between the two first rotating brackets 501. A semi-circular coarse thread sleeve 503 is provided around the coarse thread screw 502. The coarse thread screw 502 is used to push the semi-circular coarse thread sleeve 503 to move up or down.

[0082] The fine-tuning unit 600 includes:

[0083] There are two second rotating brackets 601, and the two second rotating brackets 601 are respectively fixedly installed on the top wall and bottom wall of the dustproof outer frame 100. A fine thread screw 602 is rotatably installed between the two second rotating brackets 601. A semi-circular fine thread sleeve 603 is provided around the fine thread screw 602. The fine thread screw 602 is used to push the semi-circular fine thread sleeve 603 to move up or down.

[0084] The switching unit 700 includes:

[0085] The switching table 701 is slidably installed inside the guide frame 401. A clearance groove 7001 is provided through the top of the switching table 701. Arc-shaped assembly grooves 702 are provided at both the left and right ends of the switching table 701. A semi-circular coarse wire sleeve 503 is fixedly installed inside the arc-shaped assembly groove 702 at the left end of the switching table 701, and a semi-circular fine wire sleeve 603 is fixedly installed inside the arc-shaped assembly groove 702 at the right end of the switching table 701.

[0086] The pusher frame 703 is fixedly installed at the bottom front end of the switcher 701, and the pusher rod 704 is fixedly installed on the front of the pusher frame 703. The pusher rod 704 is slidably installed inside the thrust groove 204.

[0087] The switching unit 700 also includes:

[0088] The elastic latch 706 is fixedly installed at the bottom of the switch 701. The elastic latch 706 is located at the top of the trigger block 303 and at the right end of the clearance slot 7001.

[0089] The limiting angle iron 707 is fixedly installed on the back of the guide frame 401. The bottom of the limiting angle iron 707 is set in a forward right-angle bend. The right end of the elastic latch 706 is engaged with the left end of the limiting angle iron 707.

[0090] Positioning posts 708: Two positioning posts 708, distributed front and rear, are fixedly installed on the top right end of the switching platform 701. The two positioning posts 708 are respectively fixedly connected to the left ends of two tension springs 404.

[0091] The drive unit 900 drives the coarse thread screw 502 and the fine thread screw 602 to rotate, pushing the semi-circular coarse thread sleeve 503, which is threaded to them, downward. The downward movement of the semi-circular coarse thread sleeve 503 causes the switching table 701 and the guide frame 401 to move downward. The downward movement of the guide frame 401 is more stable due to the sliding connection between the linear slider 402 and the path groove 103. The downward movement of the switching table 701 further pushes the push rod 704 downward through the connection of the push guide frame 703. The downward movement of the push rod 704, through the sliding connection with the thrust groove 204, further pushes the push guide seat 20... 3. The adjusting bracket 201 and dial indicator 202 are pushed downwards, thereby coarsely adjusting the dial indicator 202. At the same time, the switching table 701 also moves the elastic latch 706 downwards, and the guide frame 401 moves downwards, causing the limiting angle iron 707 to move as well. Due to the engagement between the elastic latch 706 and the limiting angle iron 707, the two tension springs 404, which are in a stretched state, cannot be released until the bottom of the elastic latch 706 contacts the top of the trigger block 303. Then, the trigger block 303 pushes the elastic latch 706 upwards, causing the elastic latch 706 to bend elastically and release the engagement with the limiting angle iron 707. The two tension springs 404, under tension, release their rebound force, pushing the switching platform 701 to the right along the inside of the guide frame 401. The movement of the switching platform 701, via the two arc-shaped mounting slots 702, causes the semi-circular coarse thread sleeve 503 and the semi-circular fine thread sleeve 603 to move together, resulting in the separation of the semi-circular coarse thread sleeve 503 from the coarse thread screw 502, while the semi-circular fine thread sleeve 603 engages with the fine thread screw 602. Through the threaded thrust between the fine thread screw 602 and the semi-circular fine thread sleeve 603, the semi-circular fine thread sleeve 603 is pushed downwards. The downward movement of the semi-circular fine thread sleeve 603, through the connection of the switching platform 701, drives the pusher frame. 703, together with the push rod 704, moves downward, causing the adjustment frame 201 and the dial indicator 202 to make fine adjustments downward. Compared with the prior art, this device eliminates the need for manual switching between coarse and fine adjustments, making it significantly more convenient to use. It also avoids the possibility of accidental contact by the dial indicator 202 probe. It should be noted that in this device, when the semi-circular fine wire sleeve 603 engages with the fine thread screw 602, as the switching table 701 moves downward, the top of the trigger rod 301 just passes through the bottom of the relief groove 7001, thus not interfering with the downward movement of the switching table 701.

[0092] Furthermore, a grip bar 709 is fixedly installed on the top left end of the switch 701, and the grip bar 709 moves through the path groove 103 on the left wall of the dustproof outer frame 100.

[0093] After the test is completed, by rotating the coarse thread screw 502 and the fine thread screw 602 in the opposite direction, the semi-circular fine thread sleeve 603 first drives the switching part 700, the guide part 400 and the detection part 200 to move upward until the top of the trigger rod 301 exits from the bottom of the relief groove 7001. Then, by pulling the gripping rod 709 to the left, the switching table 701 is pulled to the left along the inside of the guide frame 401, so that the elastic latch 706 moves again to the left end of the limiting angle iron 707, so that its right end engages with the left end of the limiting angle iron 707 again. At the same time, the leftward movement of the switching table 701 causes the two tension springs 404 to elastically stretch again, providing elastic potential energy for the switching table 701 to move to the right, waiting for the next test.

[0094] Reference Figure 5 and Figure 12 As shown:

[0095] Positioning unit 800 includes:

[0096] The positioning screw 801 is rotatably mounted on the back of the dustproof outer frame 100. The positioning screw 801 extends movably into the interior of the dustproof outer frame 100. The positioning screw 801 is threadedly connected to the outer periphery of the positioning plate 802. The front of the positioning plate 802 abuts against the back of the trigger rod 301. The positioning plate 802 is used for the up and down positioning of the trigger rod 301.

[0097] The positioning handwheel 803 is fixedly installed at the rear end of the positioning screw 801.

[0098] By manually rotating the positioning handwheel 803, the positioning screw 801 is rotated, causing the positioning plate 802 to move away from the trigger rod 301. Then, the trigger rod 301 can be slid upward along the inner wall of the second square opening 102 to adjust the height of the U-shaped observation frame 302 so that the bottom of the U-shaped observation frame 302 is slightly higher than the top of the CNC turntable. After adjusting the height of the U-shaped observation frame 302, the positioning handwheel 803 is rotated in the opposite direction, causing the positioning screw 801 to reverse and push the positioning plate 802 closer to the trigger rod 301 until the front of the positioning plate 802 abuts against the back of the trigger rod 301, thus completing the positioning function of the trigger rod 301 and preventing the trigger rod 301 from moving unnecessarily again.

[0099] Reference Figure 6 As shown:

[0100] Drive unit 900 includes:

[0101] A drive handwheel 901 is rotatably mounted on the top of the dustproof outer frame 100. A drive shaft 902 is fixedly mounted on the bottom of the drive handwheel 901. The drive shaft 902 movably passes through the top of the dustproof outer frame 100 and is rotatably connected to the top of the dustproof outer frame 100. A drive gear 903 is fixedly mounted on the bottom of the drive shaft 902. Two driven gears 904 distributed on the left and right are meshed around the drive gear 903. The two driven gears 904 are fixedly connected to the top of the coarse thread screw 502 and the top of the fine thread screw 602, respectively.

[0102] By applying force to the surface of the drive handwheel 901, the drive shaft 902 is driven to rotate along with the drive gear 903. The rotation of the drive gear 903 further drives the two driven gears 904 meshing with it to rotate, causing the coarse-tooth screw 502 and the fine-tooth screw 602 to rotate together, thereby making coarse and fine adjustments to the dial indicator 202.

[0103] A method for using a precision testing device for a CNC rotary table includes the following steps:

[0104] S1. The device is fixed by the fixing bracket provided on the back of the dustproof outer frame 100;

[0105] S2. After the positioning unit 800 releases the positioning effect on the trigger unit 300, the trigger rod 301 is adjusted up and down to adjust the bottom height of the U-shaped observation frame 302 to be slightly higher than the top height of the CNC turntable, and then the positioning unit 800 locks and positions the trigger unit 300.

[0106] S3. The coarse adjustment unit 500 and the fine adjustment unit 600 are driven to operate by the drive unit 900, so that the coarse thread screw 502 drives the semi-circular coarse thread sleeve 503 to move downward, pushing the guide unit 400 and the switching unit 700 downward. The downward movement of the switching unit 700 pushes the detection unit 200 downward, thus performing coarse adjustment.

[0107] S4. As the switching unit 700 moves downward, the bottom of the elastic latch 706 touches the top of the trigger block 303. The trigger block 303 pushes the elastic latch 706 upward, and the two tension springs 404, which are under tension, pull the switching table 701 to the right along the guide frame 401. This causes the semi-circular coarse thread sleeve 503 to separate from the coarse thread screw 502, and the semi-circular fine thread sleeve 603 to engage with the fine thread screw 602. Subsequently, the rotation of the fine thread screw 602 drives the semi-circular fine thread sleeve 603 to move downward, thereby pushing the guide unit 400 and the switching unit 700 downward. The downward movement of the switching unit 700 pushes the detection unit 200 downward, thereby automatically making fine adjustments to the detection unit 200.

[0108] In this solution, a precision testing device for a CNC rotary table is fixedly installed using a fixed bracket on the back of a dustproof outer frame 100 during operation.

[0109] In use, first, manually rotate the positioning handwheel 803 to drive the positioning screw 801 to rotate, causing the positioning plate 802 to move away from the trigger rod 301. Then, slide the trigger rod 301 upward along the inner wall of the second square opening 102 to adjust the height of the U-shaped observation frame 302 so that the bottom of the U-shaped observation frame 302 is slightly higher than the top of the CNC turntable. After adjusting the height of the U-shaped observation frame 302, rotate the positioning handwheel 803 in the opposite direction, causing the positioning screw 801 to reverse and push the positioning plate 802 closer to the trigger rod 301 until the front of the positioning plate 802 abuts against the back of the trigger rod 301, thus completing the positioning function of the trigger rod 301 and preventing the trigger rod 301 from moving unnecessarily again.

[0110] After the height positioning of the U-shaped observation frame 302 is completed, force is applied to the surface of the drive handwheel 901 to drive the drive shaft 902 and the drive gear 903 to rotate. The rotation of the drive gear 903 further drives the two driven gears 904 meshing with it to rotate, causing the coarse-pitch screw 502 and the fine-pitch screw 602 to rotate together. The rotation of the coarse-pitch screw 502 pushes the semi-circular coarse thread sleeve 503 threaded to it downward. The downward movement of the semi-circular coarse thread sleeve 503 drives the switching table 701 and the guide... The guide frame 401 moves downward, and the downward movement of the guide frame 401 is more stable due to the sliding connection between the linear slider 402 and the path groove 103. The downward movement of the switching table 701 further pushes the push rod 704 downward through the connection of the push frame 703. The downward movement of the push rod 704, through the sliding connection with the push groove 204, further pushes the push seat 203, the adjustment frame 201 and the dial indicator 202 downward, thereby performing coarse adjustment of the dial indicator 202.

[0111] Simultaneously, the switching platform 701 also moves the elastic latch 706 downwards, and the downward movement of the guide frame 401 moves the limiting angle iron 707 along with it. Due to the engagement between the elastic latch 706 and the limiting angle iron 707, the two tension springs 404, which are in a stretched state, cannot be released until the bottom of the elastic latch 706 contacts the top of the trigger block 303. Then, the trigger block 303 pushes the elastic latch 706 upwards, causing the elastic latch 706 to bend elastically, releasing the engagement with the limiting angle iron 707. The rebound force of the two tension springs 404 is released, pushing the switching platform 701 to the right along the inside of the guide frame 401. The movement of the switching platform 701 drives the semi-circular coarse wire sleeve 5 through the two arc-shaped assembly slots 702. The semicircular fine thread sleeve 603 and the semicircular coarse thread sleeve 503 move together, causing the semicircular coarse thread sleeve 503 to separate from the coarse thread screw 502, while the semicircular fine thread sleeve 603 engages with the fine thread screw 602. Through the thread thrust between the fine thread screw 602 and the semicircular fine thread sleeve 603, the semicircular fine thread sleeve 603 is pushed downward. The downward movement of the semicircular fine thread sleeve 603 drives the pusher frame 703 and the pusher rod 704 to move downward through the connection of the switching table 701, which in turn moves the adjusting frame 201 and the dial indicator 202 downward for fine adjustment. Compared with the prior art, this device does not require manual switching between coarse and fine adjustment. In terms of ease of use, this device is significantly superior to the prior art, and at the same time avoids the possibility of accidental contact of the dial indicator 202 probe.

[0112] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A precision testing device for a CNC rotary table, characterized in that: include: A dustproof outer frame (100) has a first square opening (101) through the bottom and a second square opening (102) through the bottom. The detection unit (200) is slidably provided inside the first square opening (101), and the detection unit (200) is used for CNC rotary table accuracy detection; A trigger part (300) is slidably provided inside the second square opening (102). The trigger part (300) is used to protect the detection part (200). The trigger part (300) includes: A trigger rod (301) is slidably installed inside the second square opening (102), and the trigger rod (301) is located on the back of the adjustment frame (201); a U-shaped observation frame (302) is fixedly installed at the bottom of the trigger rod (301), and the U-shaped observation frame (302) is located at the bottom of the dial gauge (202); Trigger block (303), the top of the trigger rod (301) is fixedly installed with trigger block (303); A guide section (400) is slidably provided inside the dustproof outer frame (100). The guide section (400) is used for the up-and-down adjustment of the detection section (200). The guide section (400) includes: Guide frame (401), the guide frame (401) is located inside the dustproof outer frame (100); Spring fixing bracket (403): Two spring fixing brackets (403) are fixedly installed at the top right end of the guide frame (401), and tension springs (404) are fixedly installed on the periphery of the two spring fixing brackets (403). A coarse adjustment section (500) is rotatably provided inside the dustproof outer frame (100). The coarse adjustment section (500) is used for coarse adjustment of the detection section (200). The coarse adjustment section (500) includes: There are two first rotating brackets (501), and the two first rotating brackets (501) are respectively fixedly installed on the top wall and bottom wall of the dustproof outer frame (100). A coarse thread screw (502) is rotatably installed between the two first rotating brackets (501). A semi-circular coarse thread sleeve (503) is provided around the coarse thread screw (502). The coarse thread screw (502) is used to push the semi-circular coarse thread sleeve (503) to move up or down. A fine-tuning section (600) is rotatably provided inside the dustproof outer frame (100). The fine-tuning section (600) is used for fine adjustment of the detection section (200). The fine-tuning section (600) includes: The second rotating bracket (601) has two components, and the two second rotating brackets (601) are respectively fixedly installed on the top wall and bottom wall of the dustproof outer frame (100). A fine thread screw (602) is rotatably installed between the two second rotating brackets (601). A semi-circular fine thread sleeve (603) is provided around the fine thread screw (602). The fine thread screw (602) is used to push the semi-circular fine thread sleeve (603) to move up or down. A switching unit (700) is slidably provided inside the guide unit (400). The switching unit (700) is used for automatic switching between coarse and fine adjustment. The switching unit (700) includes: A switching platform (701) is slidably installed inside a guide frame (401). A clearance groove (7001) is provided through the top of the switching platform (701). Arc-shaped assembly grooves (702) are provided at both the left and right ends of the switching platform (701). A semi-circular coarse wire sleeve (503) is fixedly installed inside the arc-shaped assembly groove (702) at the left end of the switching platform (701). An elastic latch (706) is fixedly installed at the bottom of the switching station (701). The elastic latch (706) is located at the top of the trigger block (303) and at the right end of the clearance groove (7001). A limiting angle iron (707) is fixedly installed on the back of the guide frame (401). The bottom of the limiting angle iron (707) is set in a forward right-angle bend. The right end of the elastic latch (706) is engaged with the left end of the limiting angle iron (707). Positioning posts (708): Two positioning posts (708) are fixedly installed on the top right end of the switching platform (701), and the two positioning posts (708) are respectively fixedly connected to the left ends of two tension springs (404). A gripping bar (709) is fixedly installed on the top left end of the switching platform (701). The gripping bar (709) moves through the path groove (103) on the left wall of the dustproof outer frame (100). Positioning part (800): The dustproof outer frame (100) is rotatably provided with a positioning part (800), the positioning part (800) extends movably into the interior of the dustproof outer frame (100), and the positioning part (800) is used for positioning the trigger part (300); A drive unit (900) is rotatably provided on the top of the dustproof outer frame (100). The drive unit (900) extends movably into the interior of the dustproof outer frame (100). The drive unit (900) is used to drive the coarse adjustment unit (500) and the fine adjustment unit (600).

2. The precision detection device for a CNC rotary table according to claim 1, characterized in that: The detection unit (200) includes: An adjustment frame (201) is slidably installed inside the first square opening (101). The bottom of the adjustment frame (201) is set in a forward right-angle bend. A dial indicator (202) is fixedly installed at the end of the horizontal section of the adjustment frame (201). The adjustment frame (201) is used for the up and down adjustment of the dial indicator (202). A pusher seat (203) is fixedly installed on the top of the adjustment frame (201), and a thrust groove (204) is provided through the front of the pusher seat (203).

3. The precision detection device for a CNC rotary table according to claim 2, characterized in that: The guide section (400) further includes: The guide frame (401) is located inside the dustproof outer frame (100). The dustproof outer frame (100) has two path grooves (103) distributed front and back on both the left and right sides. The guide frame (401) has two linear sliders (402) distributed front and back on both the left and right sides. The linear sliders (402) are slidably connected to the path grooves (103) for guiding the guide frame (401) up and down.

4. The precision detection device for a CNC rotary table according to claim 3, characterized in that: The semi-circular fine wire sleeve (603) is fixedly installed inside the arc-shaped assembly slot (702) opened at the right end of the switching table (701); A pusher frame (703) is fixedly installed at the bottom front end of the switching platform (701), and a pusher rod (704) is fixedly installed on the front of the pusher frame (703). The pusher rod (704) is slidably installed inside the thrust groove (204).

5. The precision detection device for a CNC rotary table according to claim 4, characterized in that: The positioning unit (800) includes: A positioning screw (801) is rotatably mounted on the back of the dustproof outer frame (100). The positioning screw (801) extends movably into the interior of the dustproof outer frame (100). A positioning pressure plate (802) is threadedly connected to the outer periphery of the positioning screw (801). The front of the positioning pressure plate (802) abuts against the back of the trigger rod (301). The positioning pressure plate (802) is used for the up and down positioning of the trigger rod (301). A positioning handwheel (803) is fixedly installed at the rear end of the positioning screw (801).

6. The precision detection device for a CNC rotary table according to claim 5, characterized in that: The drive unit (900) includes: A drive handwheel (901) is rotatably mounted on the top of the dustproof outer frame (100). A drive shaft (902) is fixedly mounted on the bottom of the drive handwheel (901). The drive shaft (902) movably passes through the top of the dustproof outer frame (100) and is rotatably connected to the top of the dustproof outer frame (100). A drive gear (903) is fixedly mounted on the bottom of the drive shaft (902). Two driven gears (904) are meshed on the periphery of the drive gear (903). The two driven gears (904) are fixedly connected to the top of the coarse thread screw (502) and the top of the fine thread screw (602), respectively.

7. The detection method for a precision detection device for a CNC rotary table according to claim 6, characterized in that: The following usage steps are included: S1. The device is fixed by the fixing bracket provided on the back of the dustproof outer frame (100); S2. After the positioning effect on the trigger part (300) is released by the positioning part (800), the trigger rod (301) is adjusted up and down to adjust the bottom height of the U-shaped observation frame (302) to be slightly higher than the top height of the CNC turntable, and then the positioning part (800) is used to lock and position the trigger part (300). S3. The coarse adjustment unit (500) and the fine adjustment unit (600) are driven to operate by the drive unit (900), so that the coarse thread screw (502) drives the semi-circular coarse thread sleeve (503) to move downward, and pushes the guide unit (400) and the switching unit (700) downward. The downward movement of the switching unit (700) pushes the detection unit (200) downward, and coarse adjustment is performed. S4. When the switching part (700) moves downward, the bottom of the elastic latch (706) touches the top of the trigger block (303). The trigger block (303) pushes the elastic latch (706) upward. The two tension springs (404) in tension pull the switching table (701) to the right along the guide frame (401), causing the semi-circular coarse thread sleeve (503) to separate from the coarse thread screw (502), and the semi-circular fine thread sleeve (603) to engage with the fine thread screw (602). Subsequently, the semi-circular fine thread sleeve (603) is driven to move downward by the rotation of the fine thread screw (602), which in turn pushes the guide part (400) and the switching part (700) downward. The downward movement of the switching part (700) pushes the detection part (200) downward, thereby automatically making fine adjustments to the detection part (200).

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