Precision detection device and detection method for numerical control rotary table

Abstract

The invention relates to the technical field of precision detection, in particular to a precision detection device and method for a numerical control rotary table, and the device comprises a dustproof outer frame, the bottom of the dustproof outer frame is provided with a first square opening in a penetrating manner, the bottom of the dustproof outer frame is provided with a second square opening in a penetrating manner, and the first square opening is internally provided with a detection part in a sliding manner. The driving part drives the coarse adjustment part to operate, the guiding part and the switching part are pushed downwards, the switching part pushes downwards to drive the detection part to move downwards together, coarse adjustment is conducted on the detection part, after the bottom of the guiding part makes contact with the top of the triggering part, the switching part moves rightwards, and therefore the downward pushing force of the coarse adjustment part on the switching part is transferred to the fine adjustment part; the guiding part, the switching part and the detection part are downwards and finely adjusted through the fine adjustment part, compared with the prior art, manual switching between coarse adjustment and fine adjustment is not needed, the use convenience degree is greatly improved, the detection efficiency is improved, and the detection productivity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of precision detection, and in particular to a precision detection device and a detection method for a numerically controlled turntable. Background Art

[0002] The CNC rotary table is one of the important accessories of CNC machine tools. It is an indispensable auxiliary machine for floor-standing milling machines, face milling machines and other machine tools. It is mainly suitable for continuous rotary processing and multi-faceted processing of plate and box workpieces. It is widely used in machinery manufacturing, aerospace and automobile manufacturing. In order to ensure the accuracy of the CNC rotary table, the CNC rotary table needs to be tested for accuracy before leaving the factory;

[0003] According to a Chinese patent with application publication number CN118328823A, a precision detection device and detection method for a CNC turntable is disclosed, which realizes the use of coarse adjustment to quickly shorten the distance between the dial gauge detection head and the detection point, and combines fine adjustment to make the dial gauge detection head contact the detection point, which can avoid the problem of the detection head being damaged or the detection data being inaccurate due to a sharp drop, and improve the measurement accuracy of the flatness of the CNC turntable. In addition, this detection operation method has low proficiency and technical requirements for workers, and workers are relatively easy to use;

[0004] The use of the above-mentioned device requires the surveyor to grasp the distance between the dial indicator detection head and the CNC turntable with the naked eye, and to switch between coarse adjustment and fine adjustment manually. It is difficult to use and the convenience of use is not ideal. It also requires a high degree of coordination between the inspector's eyes and hands. The eyesight of different inspectors may be different, which may cause the coarse adjustment to be switched to fine adjustment too early, thereby wasting adjustment time. At the same time, the dial indicator detection head may contact with the CNC turntable too quickly due to switching too late, which may still cause damage to the head or inaccurate detection data. For this reason, we propose an accuracy detection device and detection method for CNC turntable to solve the above-mentioned technical problems. Summary of the invention

[0005] The present invention provides the following technical solution: a precision detection device for a numerically controlled turntable, comprising:

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

[0007] A detection part, wherein the first square opening is provided with a detection part for sliding inside, and the detection part is used for precision detection of the CNC turntable;

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

[0009] A guide part is provided inside the dustproof outer frame for sliding, and the guide part is used for adjusting the detection part up and down;

[0010] A coarse adjustment part is provided inside the dustproof outer frame for rotation, and the coarse adjustment part is used for coarse adjustment of the detection part;

[0011] A fine adjustment part is provided inside the dustproof outer frame for fine adjustment of the detection part;

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

[0013] A positioning part is rotatably provided on the back of the dustproof outer frame, and the positioning part is movably extended to the inside of the dustproof outer frame, and the positioning part is used for positioning the trigger part;

[0014] A driving part is rotatably provided on the top of the dustproof outer frame, and the driving part movably extends to the inside of the dustproof outer frame. The driving part is used to drive the coarse adjustment part and the fine adjustment part.

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

[0016] An adjustment frame, wherein the adjustment frame is slidably mounted inside the first square opening, the bottom of the adjustment frame is arranged in a forward right-angle bend, a dial indicator is fixedly mounted on the end of the cross section of the adjustment frame, and the adjustment frame is used for adjusting the dial indicator up and down;

[0017] A derivation seat is fixedly mounted on the top of the adjustment frame, and a thrust groove is penetrated through the front of the derivation seat.

[0018] As a preferred solution of the present invention, the trigger unit includes:

[0019] A trigger rod, the trigger rod is slidably mounted inside the second square opening, the trigger rod is located at the bottom of the adjustment frame, and a U-shaped observation frame is fixedly mounted thereon, and the U-shaped observation frame is located at the bottom of the dial indicator;

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

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

[0022] A guide frame, the guide frame is located inside the dustproof outer frame, the left side and the right side of the dustproof outer frame are both provided with two path grooves distributed front and back, the left side and the right side of the guide frame are both fixedly installed with two linear sliders distributed front and back, the linear sliders are slidably connected with the path grooves, and are used for guiding the guide frame up and down;

[0023] Spring fixing frame: two spring fixing frames distributed front and back are fixedly installed on the top right end of the guide frame, and tension springs are fixedly installed on the peripheries of the two spring fixing frames.

[0024] As a preferred solution of the present invention, the coarse adjustment unit includes:

[0025] A first rotating bracket, wherein the number of the first rotating brackets is two, and the two first rotating brackets are respectively fixedly mounted on the top wall and the bottom wall of the dustproof outer frame, a coarse thread screw is rotatably mounted between the two first rotating brackets, a semicircular coarse thread sleeve is arranged on the periphery of the coarse thread screw, and the coarse thread screw is used to derive the semicircular coarse thread sleeve to move up or down;

[0026] The fine adjustment unit comprises:

[0027] The second rotating bracket, there are two second rotating brackets, and the two second rotating brackets are respectively fixedly installed on the top wall and the bottom wall of the dustproof outer frame, a fine-pitch screw is rotatably installed between the two second rotating brackets, a semicircular fine-wire sleeve is provided on the periphery of the fine-pitch screw, and the fine-pitch screw is used to guide the semicircular fine-wire sleeve to move up or down.

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

[0029] A switcher, the switcher is slidably mounted inside the guide frame, a clearance groove is formed through the top of the switcher, arc-shaped assembly grooves are formed at the left and right ends of the switcher, the semicircular thick wire sleeve is fixedly mounted inside the arc-shaped assembly groove formed at the left end of the switcher, and the semicircular thin wire sleeve is fixedly mounted inside the arc-shaped assembly groove formed at the right end of the switcher;

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

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

[0032] An elastic latch tongue is fixedly mounted on the bottom of the switch table, the elastic latch tongue is located on the top of the trigger block, and the elastic latch tongue is located 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 arranged in a right-angle bend forward, and the right end of the elastic clamping tongue is clamped with the left end of the limiting angle iron;

[0034] Positioning columns: two positioning columns distributed front and back are fixedly installed on the top right end of the switching table, and the two positioning columns are respectively fixedly connected to the left ends of two tension springs;

[0035] A grip rod is fixedly installed on the left end of the top of the switch table, and the grip rod movably passes through the path groove on the left wall of the dustproof outer frame.

[0036] As a preferred solution of the present invention, the positioning portion includes:

[0037] A positioning screw is rotatably mounted on the back of the dustproof outer frame, the positioning screw movably extends to the inside of the dustproof outer frame, the outer periphery of the positioning screw is threadedly connected with a positioning pressing piece, the front side of the positioning pressing piece abuts against the back side of the trigger rod, and the positioning pressing piece is used for the up and down positioning of the trigger rod;

[0038] A positioning hand wheel is fixedly mounted on the rear end of the positioning screw.

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

[0040] A driving handwheel is rotatably provided on the top of the dustproof outer frame, a driving shaft is fixedly installed on the bottom of the driving handwheel, the driving shaft movably passes through the top of the dustproof outer frame, and is rotatably connected to the top of the dustproof outer frame, a driving gear is fixedly installed on the bottom of the driving shaft, and the outer periphery of the driving gear is meshed with two driven gears distributed on the left and right, and the two driven gears are respectively fixedly connected to the top of the coarse-pitch screw and the top of the fine-pitch screw.

[0041] A detection method for a precision detection device for a numerically controlled turntable, comprising the following steps:

[0042] S1. Fix the device by a fixing bracket provided on the back of the dustproof outer frame;

[0043] S2. After releasing the positioning effect of the trigger part through the positioning 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 through the positioning part;

[0044] S3, the driving part drives the coarse adjustment part and the fine adjustment part to operate, so that the coarse thread screw drives the semicircular coarse thread sleeve to move downward, and the guide part and the switching part are pushed downward, and the switching part moves downward to push the detection part downward to perform coarse adjustment;

[0045] S4. When the switching part moves downward, the bottom of the elastic tongue touches the top of the trigger block, and the trigger block pushes the elastic tongue upward. The rebound force of the two tension springs in tension pulls the switching table to the right along the guide frame, causing the semicircular coarse wire sleeve to separate from the coarse thread screw, and the semicircular fine wire sleeve to combine with the fine thread screw. Subsequently, the fine thread screw is rotated to drive the semicircular fine wire sleeve to move downward, thereby pushing the guide part and the switching part downward. The switching part moves downward to push the detection part downward, thereby automatically making fine adjustments to the detection part.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. In the present invention, the driving part drives the coarse adjustment part to operate, and the guide part and the switching part are pushed downward. The switching part pushes the detection part downward to move together, and the detection part is coarsely adjusted. When the bottom of the guide part contacts the top of the trigger part, the switching part moves to the right, thereby transferring the downward thrust of the coarse adjustment part on the switching part 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, there is no need to manually switch between coarse adjustment and fine adjustment, the convenience of use is greatly improved, the efficiency of detection is improved, and it is beneficial to improve the detection capacity.

[0048] 2. In the present invention, by adjusting the trigger rod of the trigger part up and down, the bottom height adjustment range of the U-shaped observation frame is wider, so that the device can be used to measure the surface accuracy of CNC turntables of different specifications, and has strong practicality.

[0049] 3. In the present invention, by pulling the gripping rod to the left, the switching table is pulled to the left along the inside of the guide frame, so that the elastic latch moves to the left end of the limiting angle iron again, so that the right end is again engaged with the left end of the limiting angle iron. At the same time, the leftward movement of the switching table causes the two tension springs to be elastically stretched again, providing elastic potential energy for the switching table to move to the right, waiting for the next detection. The reset operation is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the left front viewing angle structure of the present invention;

[0051] Figure 2 It is a schematic diagram of the left rear viewing angle structure of the present invention;

[0052] Figure 3 It is a schematic diagram of the front cross-section structure of the dustproof outer frame in the present invention;

[0053] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure of part A;

[0054] Figure 5 It is a schematic diagram of the structure of the coarse adjustment part and the fine adjustment part in the present invention;

[0055] Figure 6 It is a structural schematic diagram of the driving part in the present invention;

[0056] Figure 7 This is a schematic diagram of the bottom viewing angle structure of the switching part in the present invention;

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

[0058] Fig. 9 It is a bottom perspective structural schematic diagram of the guide part in the present invention;

[0059] Fig.10 It is a detailed structural diagram of the switching part in the present invention;

[0060] Fig.11 It is a structural schematic diagram of the detection part in the present invention;

[0061] Fig.12 It is a schematic diagram of the structure of the trigger part and the positioning part in the present invention.

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

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0065] Reference Figures 1 to 12 As shown:

[0066] A precision detection device for a numerical control turntable comprises a dustproof outer frame 100, a first square opening 101 is formed through the bottom of the dustproof outer frame 100, a second square opening 102 is formed through the bottom of the dustproof outer frame 100, a detection unit 200 is slidably provided inside the first square opening 101, and the detection unit 200 is used for precision detection of the numerical control turntable, a trigger unit 300 is slidably provided inside the second square opening 102, and the trigger unit 300 is used for protecting the detection unit 200, a guide unit 400 is slidably provided inside the dustproof outer frame 100, a coarse adjustment unit 500 is rotatably provided inside the dustproof outer frame 100, and the coarse adjustment unit 500 is used for coarse adjustment of the detection unit 200, The dustproof outer frame 100 is internally rotated with a fine adjustment portion 600, and the fine adjustment portion 600 is used for fine adjustment of the detection portion 200. The guide portion 400 is internally slidably provided with a switching portion 700, and the switching portion 700 is used for automatic switching between coarse adjustment and fine adjustment. The back of the dustproof outer frame 100 is rotated with a positioning portion 800, and the positioning portion 800 is movably extended to the inside of the dustproof outer frame 100, and the positioning portion 800 is used for positioning the trigger portion 300. The top of the dustproof outer frame 100 is rotated with a driving portion 900, and the driving portion 900 is movably extended to the inside of the dustproof outer frame 100, and the driving portion 900 is used for driving the coarse adjustment portion 500 and the fine adjustment portion 600.

[0067] According to the height of the CNC turntable, the trigger part 300 is adjusted up and down. After the adjustment, the trigger part 300 is positioned up and down by the positioning part 800 to prevent the trigger part 300 from moving again. The coarse adjustment part 500 is driven by the driving part 900 to operate, and the guide part 400 and the switching part 700 are pushed downward. The switching part 700 pushes the detection part 200 downward to move together, and the detection part 200 is roughly adjusted. When the bottom of the guide part 400 contacts the top of the trigger part 300, the switching part 700 moves to the right, thereby transferring the downward thrust of the coarse adjustment part 500 on the switching part 700 to the fine adjustment part 600, and the guide part 400, the switching part 700 and the detection part 200 are finely adjusted downward by the fine adjustment part 600.

[0068] Reference Figure 3 to Figure 5 as well as Fig.11 As shown: the detection unit 200 includes:

[0069] An adjustment frame 201 is slidably mounted inside the first square opening 101. The bottom of the adjustment frame 201 is bent forward at a right angle. A dial indicator 202 is fixedly mounted at the end of the horizontal section of the adjustment frame 201. The adjustment frame 201 is used for adjusting the dial indicator 202 up and down.

[0070] A derivation seat 203 is fixedly mounted on the top of the adjustment frame 201 , and a thrust groove 204 is formed through the front of the derivation seat 203 .

[0071] Specifically, by placing the adjustment frame 201 inside the first square opening 101, the up and down movement of the adjustment frame 201 can be made more stable and smooth, thereby ensuring the overall stability of the adjustment frame 201. By pushing the adjustment frame 201 downward, the dial indicator 202 is moved downward 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, thereby performing precision measurement on the surface of the CNC turntable.

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

[0073] The trigger unit 300 includes:

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

[0075] A trigger block 303 is fixedly mounted on the top of the trigger rod 301 .

[0076] By slidingly installing the trigger rod 301 inside the second square opening 102, the trigger rod 301 can move up and down more stably and smoothly, ensuring the stability of the trigger rod 301 when adjusted up and down. By adjusting the position of the trigger rod 301 up and down, the bottom of the U-shaped observation frame 302 is adjusted to be slightly higher than the top of the CNC turntable.

[0077] The guide portion 400 includes:

[0078] The guide frame 401 is located inside the dustproof outer frame 100. The left side and the right side of the dustproof outer frame 100 are both provided with two path grooves 103 distributed front and back. The left side and the right side of the guide frame 401 are both fixedly installed with two linear sliders 402 distributed front and back. The linear sliders 402 are slidably connected with the path grooves 103 and are used for guiding the guide frame 401 up and down;

[0079] Spring fixing frame 403: Two spring fixing frames 403 distributed front and back are fixedly installed on the top right end of the guide frame 401, and tension springs 404 are fixedly installed on the periphery of the two spring fixing frames 403.

[0080] The coarse adjustment unit 500 includes:

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

[0082] The fine adjustment unit 600 includes:

[0083] The second rotating bracket 601, there are two second rotating brackets 601, and the two second rotating brackets 601 are respectively fixedly installed on the top wall and the bottom wall of the dustproof outer frame 100, and a fine-pitch screw 602 is rotatably installed between the two second rotating brackets 601. A semicircular fine-wire sleeve 603 is provided on the periphery of the fine-pitch screw 602, and the fine-pitch screw 602 is used to guide the semicircular fine-wire sleeve 603 to move up or down.

[0084] The switching unit 700 includes:

[0085] The switch table 701 is slidably mounted inside the guide frame 401. A clearance groove 7001 is formed on the top of the switch table 701. Arc-shaped assembly grooves 702 are formed on the left and right ends of the switch table 701. The semicircular thick wire sleeve 503 is fixedly mounted inside the arc-shaped assembly groove 702 formed on the left end of the switch table 701. The semicircular thin wire sleeve 603 is fixedly mounted inside the arc-shaped assembly groove 702 formed on the right end of the switch table 701.

[0086] A derivation frame 703 is fixedly installed at the bottom front end of the switching table 701, and a derivation rod 704 is fixedly installed at the front of the derivation frame 703. The derivation rod 704 is slidably installed inside the thrust groove 204;

[0087] The switching unit 700 further includes:

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

[0089] 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 bent forward at a right angle, and 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 back are fixedly installed on the top right end of the switching platform 701 . The two positioning posts 708 are fixedly connected to the left ends of the two tension springs 404 , respectively.

[0091] The driving unit 900 drives the coarse threaded screw 502 and the fine threaded screw 602 to rotate, pushing the semicircular coarse thread sleeve 503 threadedly connected thereto downward, and the semicircular coarse thread sleeve 503 moves downward to drive the switching table 701 and the guide frame 401 to move downward, and the guide frame 401 moves downward through the sliding connection between the linear slider 402 and the path groove 103, so that the movement can be more stable, and the switching table 701 moves downward and further pushes the derivation rod 704 downward through the connection with the derivation frame 703, and the derivation rod 704 moves downward through the sliding connection with the thrust groove 204, further pushing the derivation seat 20 3. The adjustment frame 201 and the dial indicator 202 are pushed downward, thereby roughly adjusting the dial indicator 202. At the same time, the switching table 701 also drives the elastic latch 706 to move downward, and the guide frame 401 moves downward to drive the limit angle iron 707 to move together. Due to the clamping effect of the elastic latch 706 and the limit angle iron 707, the two tension springs 404 in the stretched state cannot be released until the bottom of the elastic latch 706 contacts the top of the trigger block 303, and the trigger block 303 pushes the elastic latch 706 upward, and the elastic latch 706 is elastically bent, releasing the clamping effect with the limit angle iron 707. The two tension springs 404 in tension are released to push the switch table 701 to the right along the inside of the guide frame 401. The switch table 701 moves through the two arc-shaped assembly grooves 702 to drive the semicircular thick wire sleeve 503 and the semicircular thin wire sleeve 603 to move together, causing the semicircular thick wire sleeve 503 to separate from the coarse thread screw 502, while the semicircular thin wire sleeve 603 is engaged with the fine thread screw 602. The semicircular thin wire sleeve 603 is pushed downward by the thread thrust between the fine thread screw 602 and the semicircular thin wire sleeve 603. The semicircular thin wire sleeve 603 moves downward and drives the guide frame through the connection of the switch table 701. 703 together with the push rod 704 moves downward, and the adjustment frame 201 together with the dial indicator 202 are finely adjusted downward, so that compared with the prior art, the device does not need to be manually switched between coarse adjustment and fine adjustment. In terms of ease of use, the present 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. It should be noted that in the present device, when the semicircular filament sleeve 603 is engaged with the fine-thread screw 602, as the switching table 701 moves downward, the top of the trigger rod 301 just penetrates from the bottom of the make way slot 7001, thereby not interfering with the downward movement of the switching table 701.

[0092] Furthermore, a gripping rod 709 is fixedly installed on the top left end of the switching platform 701 , and the gripping rod 709 movably passes through the path groove 103 on the left wall of the dustproof outer frame 100 .

[0093] After the detection is completed, by rotating the coarse-thread screw 502 and the fine-thread screw 602 in the opposite direction, the semicircular filament 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 withdraws from the bottom of the yield groove 7001, and then the switching table 701 is pulled to the left along the inside of the guide frame 401 by pulling the grip rod 709 to the left, so that the elastic latch 706 moves to the left end of the limiting angle iron 707 again, so that the right end is again engaged with the left end of the limiting angle iron 707. At the same time, the left movement of the switching table 701 causes the two tension springs 404 to be elastically stretched again, providing elastic potential energy for the switching table 701 to move to the right, waiting for the next detection.

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

[0095] The positioning unit 800 includes:

[0096] Positioning screw 801, the back of the dustproof outer frame 100 is rotatably mounted with the positioning screw 801, the positioning screw 801 is movably extended to the inside of the dustproof outer frame 100, the outer periphery of the positioning screw 801 is threadedly connected with a positioning pressing piece 802, the front side of the positioning pressing piece 802 abuts against the back side of the trigger rod 301, and the positioning pressing piece 802 is used for the up and down positioning of the trigger rod 301;

[0097] Positioning hand wheel 803: A positioning hand wheel 803 is fixedly mounted on the rear end of the positioning screw 801.

[0098] By manually rotating the positioning hand wheel 803 to drive the positioning screw 801 to rotate, the positioning pressure piece 802 is moved in the direction away from the trigger rod 301. Thereafter, 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 hand wheel 803 is rotated in the opposite direction to make the positioning screw 801 reverse and push the positioning pressure piece 802 in the direction close to the trigger rod 301 until the front side of the positioning pressure piece 802 abuts against the back side of the trigger rod 301, thereby completing the positioning of the trigger rod 301 to prevent the trigger rod 301 from moving unnecessary again.

[0099] Reference Figure 6 As shown:

[0100] The driving unit 900 includes:

[0101] A driving hand wheel 901 is rotatably provided at the top of the dustproof outer frame 100, a driving shaft 902 is fixedly installed at the bottom of the driving hand wheel 901, the driving 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 driving gear 903 is fixedly installed at the bottom of the driving shaft 902, and the outer periphery of the driving gear 903 is meshed with two left and right distributed driven gears 904, and the two driven gears 904 are respectively fixedly connected to the top of the coarse-pitch screw 502 and the top of the fine-pitch screw 602.

[0102] By applying force to the surface of the driving hand wheel 901, the driving shaft 902 is driven to rotate together with the driving gear 903. The rotation of the driving gear 903 further drives the two driven gears 904 meshing therewith to rotate, so that the coarse thread screw 502 and the fine thread screw 602 rotate together, thereby making coarse and fine adjustments to the dial indicator 202.

[0103] A detection method for a precision detection device for a numerically controlled turntable, comprising the following steps:

[0104] S1. Fix the device by a fixing bracket provided on the back of the dustproof outer frame 100;

[0105] S2, after releasing the positioning effect of the trigger part 300 by the positioning part 800, adjust the trigger rod 301 up and down, 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 lock the trigger part 300 by the positioning part 800;

[0106] S3, the driving part 900 drives the coarse adjustment part 500 and the fine adjustment part 600 to operate, so that the coarse thread screw 502 drives the semicircular coarse thread sleeve 503 to move downward, and the guide part 400 and the switching part 700 are pushed downward, and the switching part 700 moves downward to push the detection part 200 downward, so as to perform coarse adjustment;

[0107] S4. When the switching part 700 moves downward, the bottom of the elastic tongue 706 touches the top of the trigger block 303, and the trigger block 303 pushes the elastic tongue 706 upward. The rebound force of the two tension springs 404 in tension pulls the switching table 701 to move rightward along the guide frame 401, causing the semicircular coarse wire sleeve 503 to separate from the coarse thread screw 502, and the semicircular fine wire sleeve 603 to combine with the fine thread screw 602. Subsequently, the fine thread screw 602 rotates and drives the semicircular fine wire sleeve 603 to move downward, thereby pushing the guide part 400 and the switching part 700 downward. The switching part 700 moves downward to push the detection part 200 downward, thereby automatically making fine adjustments to the detection part 200.

[0108] In this scheme, when the precision detection device for a numerical control turntable is working, the device is fixedly installed by a fixing bracket arranged on the back of the dustproof outer frame 100;

[0109] When in use, first manually rotate the positioning hand wheel 803 to drive the positioning screw 801 to rotate, so that the positioning pressure piece 802 moves in the direction away from the trigger rod 301. Thereafter, 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 hand wheel 803 is rotated in the opposite direction so that the positioning screw 801 is reversed to push the positioning pressure piece 802 in the direction close to the trigger rod 301 until the front side of the positioning pressure piece 802 abuts against the back side of the trigger rod 301, thereby completing the positioning of the trigger rod 301 to prevent the trigger rod 301 from moving again unnecessarily.

[0110] After the height positioning of the U-shaped observation frame 302 is completed, force is applied to the surface of the driving hand wheel 901 to drive the driving shaft 902 and the driving gear 903 to rotate. The rotation of the driving gear 903 further drives the two driven gears 904 meshing therewith to rotate, so that the coarse thread screw 502 and the fine thread screw 602 rotate together. The rotation of the coarse thread screw 502 pushes the semicircular coarse wire sleeve 503 threadedly connected thereto downward, and the semicircular coarse wire sleeve 503 moves downward to drive the switching table 701 together with the guide The guide frame 401 moves downward, and the guide frame 401 moves downward through the sliding connection between the linear slider 402 and the path groove 103, so that the movement can be more stable, and the switching table 701 moves downward and further pushes the derivation rod 704 downward through the connection with the derivation frame 703, and the derivation rod 704 moves downward through the sliding connection with the thrust groove 204, and further pushes the derivation seat 203, the adjustment frame 201 and the dial indicator 202 downward, so as to perform a rough adjustment on the dial indicator 202;

[0111] At the same time, the switch table 701 also drives the elastic latch tongue 706 to move downward, and the guide frame 401 moves downward to drive the limiting angle iron 707 to move together. Due to the clamping effect of the elastic latch tongue 706 and the limiting angle iron 707, the two tension springs 404 in the stretched state cannot be released until the bottom of the elastic latch tongue 706 contacts the top of the trigger block 303, the trigger block 303 pushes the elastic latch tongue 706 upward, the elastic latch tongue 706 is elastically bent, and the clamping effect with the limiting angle iron 707 is released, the rebound force of the two stretched tension springs 404 is released, and the switch table 701 is pushed rightward along the inside of the guide frame 401, and the switch table 701 moves through the two arc assembly grooves 702 to drive the semicircular thick wire sleeve 5 03 and the semicircular filament sleeve 603 move together, causing the semicircular coarse filament sleeve 503 to separate from the coarse thread screw 502, while the semicircular filament sleeve 603 is meshed with the fine thread screw 602, and the semicircular filament sleeve 603 is pushed downward by the thread thrust between the fine thread screw 602 and the semicircular filament sleeve 603, and the downward movement of the semicircular filament sleeve 603 drives the deduction frame 703 and the deduction rod 704 to move downward through the connection action of the switching table 701, and the adjustment frame 201 and the dial indicator 202 are finely adjusted downward, so that compared with the prior art, the device does not need to be manually switched between coarse adjustment and fine adjustment. In terms of ease of use, the 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] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A precision detection device for a CNC turntable, characterized in that: include: A dustproof outer frame (100), wherein a first square opening (101) is provided through the bottom of the dustproof outer frame (100), and a second square opening (102) is provided through the bottom of the dustproof outer frame (100); A detection part (200), the first square opening (101) is slidably provided with a detection part (200) inside, and the detection part (200) is used for precision detection of the CNC turntable; A trigger part (300), the second square opening (102) is slidably provided with a trigger part (300), and the trigger part (300) is used to protect the detection part (200); A guide portion (400), the dustproof outer frame (100) is slidably provided with a guide portion (400) inside, and the guide portion (400) is used for adjusting the detection portion (200) up and down; A coarse adjustment portion (500), the dustproof outer frame (100) is internally rotatably provided with the coarse adjustment portion (500), and the coarse adjustment portion (500) is used for coarse adjustment of the detection portion (200); A fine adjustment portion (600), the dustproof outer frame (100) is internally rotatably provided with the fine adjustment portion (600), and the fine adjustment portion (600) is used for fine adjustment of the detection portion (200); A switching part (700), wherein the guide part (400) is slidably provided with the switching part (700) inside, and the switching part (700) is used for automatic switching between coarse adjustment and fine adjustment; A positioning portion (800), wherein the back of the dustproof outer frame (100) is rotatably provided with the positioning portion (800), the positioning portion (800) movably extends into the interior of the dustproof outer frame (100), and the positioning portion (800) is used for positioning the trigger portion (300); A driving part (900) is rotatably provided on the top of the dustproof outer frame (100), the driving part (900) movably extends into the interior of the dustproof outer frame (100), and the driving part (900) is used to drive the coarse adjustment part (500) and the fine adjustment part (600).

2. The precision detection device for a CNC turntable according to claim 1, characterized in that: The detection unit (200) comprises: An adjustment frame (201), the adjustment frame (201) being slidably mounted inside the first square opening (101), the bottom of the adjustment frame (201) being arranged in a forward right-angled bend, a dial indicator (202) being fixedly mounted at the end of a transverse section of the adjustment frame (201), and the adjustment frame (201) being used for adjusting the dial indicator (202) up and down; A derivation seat (203) is fixedly mounted on the top of the adjustment frame (201), and a thrust groove (204) is formed through the front surface of the derivation seat (203).

3. The precision detection device for a numerically controlled turntable according to claim 2, characterized in that: The trigger unit (300) comprises: A trigger rod (301), the trigger rod (301) being slidably mounted inside the second square opening (102), the trigger rod (301) being located at the back of the adjustment frame (201); a U-shaped observation frame (302) being fixedly mounted at the bottom of the trigger rod (301), the U-shaped observation frame (302) being located at the bottom of the dial indicator (202); A trigger block (303) is fixedly mounted on the top of the trigger rod (301).

4. The precision detection device for a numerically controlled turntable according to claim 3, characterized in that: The guide portion (400) comprises: A guide frame (401), the guide frame (401) being located inside the dustproof outer frame (100), the left side and the right side of the dustproof outer frame (100) both being provided with two path grooves (103) distributed front to back, the left side and the right side of the guide frame (401) both being fixedly mounted with two linear sliders (402) distributed front to back, the linear sliders (402) being slidably connected to the path grooves (103) and being used for guiding the guide frame (401) up and down; Spring fixing frames (403), two spring fixing frames (403) distributed front and back are fixedly installed on the top right end of the guide frame (401), and tension springs (404) are fixedly installed on the peripheries of the two spring fixing frames (403).

5. The precision detection device for a numerically controlled turntable according to claim 4, characterized in that: The coarse adjustment unit (500) comprises: A first rotating bracket (501), wherein the number of the first rotating brackets (501) is two, and the two first rotating brackets (501) are respectively fixedly mounted on the top wall and the bottom wall of the dustproof outer frame (100), a coarse thread screw (502) is rotatably mounted between the two first rotating brackets (501), a semicircular coarse thread sleeve (503) is provided on the periphery of the coarse thread screw (502), and the coarse thread screw (502) is used to guide the semicircular coarse thread sleeve (503) to move up or down; The fine adjustment unit (600) comprises: A second rotating bracket (601), the number of the second rotating bracket (601) is two, and the two second rotating brackets (601) are respectively fixedly mounted on the top wall and the bottom wall of the dustproof outer frame (100), a fine-pitch screw (602) is rotatably mounted between the two second rotating brackets (601), a semicircular fine-wire sleeve (603) is provided on the periphery of the fine-pitch screw (602), and the fine-pitch screw (602) is used to guide the semicircular fine-wire sleeve (603) to move up or down.

6. The precision detection device for a numerically controlled turntable according to claim 5, characterized in that: The switching unit (700) comprises: A switch table (701), the switch table (701) is slidably mounted inside the guide frame (401), a clearance groove (7001) is provided through the top of the switch table (701), an arc-shaped assembly groove (702) is provided at the left and right ends of the switch table (701), the semicircular thick wire sleeve (503) is fixedly mounted inside the arc-shaped assembly groove (702) provided at the left end of the switch table (701), and the semicircular thin wire sleeve (603) is fixedly mounted inside the arc-shaped assembly groove (702) provided at the right end of the switch table (701); A derivation frame (703) is fixedly mounted on the front end of the bottom of the switching platform (701), a derivation rod (704) is fixedly mounted on the front of the derivation frame (703), and the derivation rod (704) is slidably mounted inside the thrust groove (204).

7. The precision detection device for a numerically controlled turntable according to claim 6, characterized in that: The switching unit (700) further includes: An elastic latch tongue (706), the bottom of the switch table (701) is fixedly mounted with an elastic latch tongue (706), the elastic latch tongue (706) is located on the top of the trigger block (303), and the elastic latch tongue (706) is located at the right end of the clearance groove (7001); A limiting angle iron (707), wherein the limiting angle iron (707) is fixedly mounted on the back of the guide frame (401), the bottom of the limiting angle iron (707) is arranged in a forward right-angle bend, and the right end of the elastic latch (706) is latched with the left end of the limiting angle iron (707); Positioning columns (708), two positioning columns (708) distributed front and back are fixedly installed on the top right end of the switching table (701), and the two positioning columns (708) are respectively fixedly connected to the left ends of the two tension springs (404); A gripping rod (709) is fixedly mounted on the left end of the top of the switching table (701), and the gripping rod (709) movably passes through the path groove (103) on the left wall of the dustproof outer frame (100).

8. The precision detection device for a numerically controlled turntable according to claim 7, characterized in that: The positioning portion (800) comprises: A positioning screw (801), the back side of the dustproof outer frame (100) is rotatably mounted with the positioning screw (801), the positioning screw (801) movably extends into the interior of the dustproof outer frame (100), the outer periphery of the positioning screw (801) is threadedly connected with a positioning pressing piece (802), the front side of the positioning pressing piece (802) abuts against the back side of the trigger rod (301), and the positioning pressing piece (802) is used for vertical positioning of the trigger rod (301); A positioning hand wheel (803) is fixedly mounted on the rear end of the positioning screw (801).

9. The precision detection device for a numerically controlled turntable according to claim 8, characterized in that: The driving unit (900) comprises: A driving hand wheel (901) is rotatably provided at the top of the dustproof outer frame (100), a driving shaft (902) is fixedly installed at the bottom of the driving hand wheel (901), the driving 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 driving gear (903) is fixedly installed at the bottom of the driving shaft (902), the outer periphery of the driving gear (903) is meshed with two left and right distributed driven gears (904), and the two driven gears (904) are respectively fixedly connected to the top of the coarse-pitch screw (502) and the top of the fine-pitch screw (602).

10. The detection method for the precision detection device of a numerical control turntable according to claim 9, characterized in that: The usage steps include the following: S1, fixing the device by means of a fixing bracket provided on the back of the dustproof outer frame (100); S2, after releasing the positioning effect of the trigger part (300) by the positioning part (800), the trigger rod (301) is adjusted up and down, the bottom height of the U-shaped observation frame (302) is adjusted to be slightly higher than the top height of the CNC turntable, and then the trigger part (300) is locked and positioned by the positioning part (800); S3, the driving part (900) drives the coarse adjustment part (500) and the fine adjustment part (600) to operate, so that the coarse thread screw (502) drives the semicircular coarse thread sleeve (503) to move downward, and the guide part (400) and the switching part (700) are pushed downward, and the switching part (700) moves downward to push the detection part (200) downward, so as to perform coarse adjustment; S4. When the switching part (700) moves downward, the bottom of the elastic tongue (706) touches the top of the trigger block (303), and the trigger block (303) pushes the elastic tongue (706) upward. The rebound force of the two tension springs (404) in tension pulls the switching platform (701) to move rightward along the guide frame (401), causing the semicircular coarse wire sleeve (503) to separate from the coarse threaded screw (502), and the semicircular fine wire sleeve (603) to combine with the fine threaded screw (602). Subsequently, the fine threaded screw (602) rotates to drive the semicircular fine wire sleeve (603) to move downward, thereby pushing the guide part (400) and the switching part (700) downward. The switching part (700) moves downward to push the detection part (200) downward, thereby automatically making fine adjustments to the detection part (200).

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