Numerical control cutter handle precision measuring instrument

Abstract

The invention provides a numerical control cutter handle precision measuring instrument, and relates to the technical field of numerical control cutter handle measurement. Comprising a measurement installation piece, and two elastic supporting pieces are installed on the measurement installation piece. The two elastic supporting pieces are each provided with a telescopic limiting piece. The telescopic limiting piece is used for sliding on the numerical control cutter handle; a measuring sleeving piece is attached to the bottom of the telescopic limiting piece, the measuring sleeving piece conducts one-time measurement on radial deviation and swing errors of the floating numerical control cutter handle, measurement data are comprehensive, and meanwhile normal machining work of the cutter handle is not affected; the problems that an existing numerical control cutter handle precision measuring instrument is not convenient to measure radial deviation and swing errors of a floating numerical control cutter handle at a time, and the cutter handle error is not convenient to know in time when the numerical control cutter handle is used are solved.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control tool handle measurement, and in particular to a numerical control tool handle precision measuring instrument. Background Art

[0002] CNC toolholders play an important role in CNC machining. CNC machining requires toolholders to have high rigidity, precision, durability and dynamic balance performance. The precision of CNC toolholders is directly related to the machining quality. Among CNC toolholders, there are also some active CNC toolholders, such as CNC floating toolholders. Their structure can achieve radial displacement and ensure the verticality of the toolholder. Thanks to their self-aligning structure, they can avoid the problem of poor concentricity when CNC tools are machining holes. However, they also have strict requirements on the precision of the range of motion of floating toolholders. Because CNC floating toolholders use non-rigid connections, once the floating toolholders have problems such as substandard reset accuracy, their machining quality cannot meet the standards. The current CNC toolholder precision measuring instrument is not convenient for one-time measurement of radial offset and swing error for floating CNC floating toolholders. The measurement is cumbersome and the data is not comprehensive enough. It is not suitable for floating toolholders, nor is it convenient to realize real-time automatic measurement of toolholder machining process. It is not flexible enough to use, nor is it convenient to know toolholder errors in time when CNC floating toolholders are used. Cutting debris can easily affect the measurement accuracy. Summary of the invention

[0003] The disclosed embodiment relates to a CNC tool holder precision measuring instrument, whose measuring socket performs one-time measurement of radial offset and swing error of a floating CNC tool holder, and the measurement data is comprehensive. At the same time, it does not affect the normal processing work of the tool holder and does not affect production. It is also easy to display the precision deviation in time after it is found, so as to avoid causing too many workpieces to fail to meet the precision standards.

[0004] In a first aspect of the present disclosure, a CNC tool holder precision measuring instrument is provided, which specifically includes a measuring mounting part, on which two elastic support parts are installed; telescopic limit parts are installed on the two elastic support parts; a measuring sleeve part is fitted on the bottom of the telescopic limit part; the measuring sleeve part is used to measure the radial displacement and swing of the CNC tool holder; three radial limit parts are installed inside the measuring sleeve part; the three radial limit parts are used to fit the axial rolling of the CNC tool holder; the three radial limit parts are at the same interval; a height measuring device is installed on the telescopic limit part; the height measuring device is used for measuring the precision of the CNC tool holder; a limiting guide part is fixedly installed on the measuring sleeve part; the limiting guide part is used to guide chips outward; the measuring mounting part includes: a measuring clamping block and a digital display controller, two measuring clamping blocks are provided, and the two measuring clamping blocks are connected by four bolts; the two measuring clamping blocks are used to be clamped and installed on the CNC tool holder; the digital display controller is fixedly installed on the side of the measuring clamping block.

[0005] In at least some embodiments, the height measuring device includes: a height measuring frame and an electronic ruler body, the height measuring frame is fixedly mounted on a measuring mounting plate by bolts; the electronic ruler body is fixedly mounted on the height measuring frame; the measuring end of the electronic ruler body is attached to the top of the measuring shaft; the electronic ruler body is used to measure the precision deviation of the CNC tool holder; and the electronic ruler body is electrically connected to the digital display controller.

[0006] In at least some embodiments, the elastic support member includes: a telescopic rotating arm, a torsion spring shaft and a torsion spring, wherein the telescopic rotating arm is located on the inner side of the telescopic arm; a torsion spring shaft is fixedly installed on the telescopic rotating arm; the torsion spring shaft is rotatably inserted into the end of the telescopic arm; a torsion spring is sleeved on the torsion spring shaft; both ends of the torsion spring are respectively connected between the telescopic arm and the torsion spring shaft; the torsion spring is used for torque control of the outward expansion of the telescopic rotating arm.

[0007] In at least some embodiments, the measuring mounting part further includes: a telescopic arm, the digital display controller is externally connected to a power supply; two telescopic arms are rotatably mounted on the measuring clamping block; and the digital display controller is used to display the accuracy deviation.

[0008] In at least some embodiments, the telescopic limit member also includes: a measuring shaft and a fit control tension spring, the measuring shaft is slidably inserted in the through hole in the middle of the measuring mounting plate; the bottom of the measuring shaft is a hemispherical structure; a fit control tension spring is sleeved on the measuring shaft; the fit control tension spring is connected between the measuring shaft and the measuring mounting plate; the measuring shaft is used to drive the measuring sleeve to move.

[0009] In at least some embodiments, the measuring sleeve also includes: a protective ring, two of which are provided and fixedly mounted on both sides of the measuring mounting tube; the protective ring is an elastic structure and is used to be sleeved on the outside of the CNC tool handle.

[0010] In at least some embodiments, the radial limit member includes: a limit pressure regulating bolt, a wheel frame and a radial limit roller, wherein the limit pressure regulating bolt is threadedly connected to the measuring mounting tube; a hexagonal groove is provided at the end of the limit pressure regulating bolt; a wheel frame is rotatably mounted on the limit pressure regulating bolt; the wheel frame is slidably mounted inside the measuring mounting tube; two radial limit rollers are rotatably mounted on the wheel frame; both radial limit rollers are arc-shaped structures; rubber coatings are respectively provided on the outer sides of the two radial limit rollers; and the two radial limit rollers are respectively used for rolling and fitting the CNC tool handle.

[0011] In at least some embodiments, the telescopic limit member includes: a measuring mounting plate and a limit frame, wherein both ends of the measuring mounting plate are rotatably mounted on the other ends of the two telescopic rotating arms; the limit frame is installed on the side of the measuring mounting plate by bolts; the limit frame is a "U"-shaped structure; the limit frame is located outside the CNC tool handle; and a through hole is provided in the middle of the measuring mounting plate.

[0012] In at least some embodiments, the limiting guide member includes: a support column and a bevel guide ring, the support column is provided with a circle, and the circle of support columns are respectively fixedly mounted on the side of the measuring mounting tube; a circle of support columns are mounted with a bevel guide ring; the outer side of the bevel guide ring is a bevel structure; the outer side of the bevel guide ring is used to prevent chip congestion.

[0013] In at least some embodiments, the measuring sleeve includes: a measuring mounting tube and a measuring groove, the measuring mounting tube is provided with a measuring groove on the top; a measuring shaft is slidably fitted in the measuring groove; the measuring mounting tube is used to be sleeved on the outside of the CNC tool handle; the measuring groove on the measuring mounting tube has flush end faces on both axial sides, and the measuring groove on the measuring mounting tube has an arc-shaped structure radially.

[0014] The present invention provides a numerical control tool handle precision measuring instrument, which has the following beneficial effects:

[0015] The present invention adopts a radial limiter in conjunction with a measuring sleeve to ensure that the structure can accurately measure the outside of the tool holder, and can measure the radial offset and swing error of the CNC tool holder at one time. At the same time, the reset accuracy of the CNC floating tool holder after being compressed can be tested. The measurement is more comprehensive and more suitable for the measurement of longer and easily deformed CNC tool holders, and the measurement is efficient.

[0016] In addition, the elastic support can be telescopically adapted to ensure measurement of the entire section of the tool handle. By adopting the telescopic movement method, the utilization rate of the CNC tool handle can be guaranteed. While ensuring comprehensive measurement, it will not affect the feeding of the CNC tool handle into the workpiece for cutting. The outward-expanding telescopic rotating arm and telescopic large arm will not affect the normal use length of the CNC tool handle.

[0017] In addition, the height measuring device can be used to quickly detect and prompt dimensional deviations. Continuous measurements can be made during the machining process of the CNC tool holder. When dimensional deviations occur, the staff can quickly learn about it. The bevel guide ring with a bevel structure can be used to discharge chips without causing blockage between the measuring socket and the workpiece, preventing accumulated chips from affecting the machining quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1The overall structure of the present application and the schematic diagram after the CNC tool handle is installed are shown;

[0022] Figure 2 A schematic diagram showing the structure of the measuring installation member of the present application is shown;

[0023] Figure 3 A cross-sectional view showing the internal structure of the present application;

[0024] Figure 4 A schematic diagram showing the installation position of the measuring axis of the present application is shown;

[0025] Figure 5 This application shows Figure 2 Enlarged view of area B;

[0026] Figure 6 A schematic diagram showing the installation position of the measuring sleeve and the CNC tool handle of the present application is shown;

[0027] Figure 7 This application shows Figure 3 Enlarged view of area D in the middle;

[0028] Figure 8 A cross-sectional view showing the structure of the height measuring device of the present application;

[0029] Fig. 9 A schematic diagram showing the structure of the measuring sleeve of the present application is shown;

[0030] Fig.10 A schematic diagram of the radial limiter structure of the present application is shown.

[0031] Reference numerals list

[0032] 1. Measuring installation part; 101. Measuring clamping block; 102. Digital display controller; 103. Telescopic arm; 2. Elastic support part; 201. Telescopic rotating arm; 202. Torsion spring shaft; 203. Torsion spring; 3. Telescopic limiter; 301. Measuring installation plate; 302. Limiter frame; 303. Measuring shaft; 304. Fit control tension spring; 4. Measuring sleeve; 401. Measuring installation cylinder; 4011. Measuring groove; 402. Protective ring; 5. Radial limiter; 501. Limiting and pressure regulating bolt; 502. Wheel frame; 503. Radial limiting roller; 6. Height measuring device; 601. Height measuring frame; 602. Electronic ruler body; 7. Limiting guide; 701. Support column; 702. Bevel guide ring. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment 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.

[0034] Example 1: Please refer to Figures 1 to 10 :

[0035] The present invention proposes a CNC tool handle accuracy measuring instrument, comprising a measuring mounting part 1, on which two elastic support parts 2 are mounted; a telescopic limiter 3 is mounted on the two elastic support parts 2; a measuring sleeve 4 is fitted on the bottom of the telescopic limiter 3; the measuring sleeve 4 is used to measure the radial offset and swing of the CNC tool handle; three radial limiters 5 are mounted inside the measuring sleeve 4; the three radial limiters 5 are used to fit the axial rolling of the CNC tool handle; the three radial limiters 5 are spaced at the same intervals; a measuring sleeve 4 is fitted on the telescopic limiter 3; the measuring sleeve 4 is used to measure the radial offset and swing of the CNC tool handle ... There is a height measuring device 6; the height measuring device 6 is used for measuring the accuracy of the CNC tool holder; a limit guide 7 is fixedly installed on the measuring sleeve 4; the limit guide 7 is used to guide the chips outward; the measuring mounting part 1 includes: a measuring clamping block 101 and a digital display controller 102, two measuring clamping blocks 101 are provided, and the two measuring clamping blocks 101 are connected by four bolts; the two measuring clamping blocks 101 are used for clamping and installing on the CNC tool holder; the digital display controller 102 is fixedly installed on the side of the measuring clamping block 101.

[0036] In the embodiment of the present disclosure, the measuring mounting member 1 further includes: a telescopic arm 103, a digital display controller 102 with an external power supply; two telescopic arms 103 are rotatably mounted on the measuring clamping block 101; the digital display controller 102 is used to display the accuracy deviation; the elastic support member 2 includes: a telescopic rotating arm 201, a torsion spring shaft 202 and a torsion spring 203, the telescopic rotating arm 201 is located on the inner side of the telescopic arm 103; a torsion spring shaft 202 is fixedly mounted on the telescopic rotating arm 201; the torsion spring shaft 202 is rotatably plugged into the end of the telescopic arm 103; a torsion spring 203 is sleeved on the torsion spring shaft 202; the torsion spring 203 The two ends of the telescopic arm 103 and the torsion spring shaft 202 are respectively connected; the torsion spring 203 is used to control the expansion of the telescopic rotating arm 201 by torque; the telescopic limiter 3 includes: a measuring mounting plate 301 and a limiter frame 302, and the two ends of the measuring mounting plate 301 are respectively rotatably mounted on the other ends of the two telescopic rotating arms 201; the limiter frame 302 is bolted to the side of the measuring mounting plate 301; the limiter frame 302 is a "U"-shaped structure; the limiter frame 302 is located outside the CNC tool handle; a through hole is provided in the middle of the measuring mounting plate 301, and the telescopic limiter 3 is used to cooperate with the elastic support member 2; the telescopic limiter 3 The measuring shaft 303 is also provided with a measuring shaft 303 and a fitting control tension spring 304. The measuring shaft 303 is slidably inserted into the through hole in the middle of the measuring mounting plate 301. The bottom of the measuring shaft 303 is a hemispherical structure. The fitting control tension spring 304 is sleeved on the measuring shaft 303. The fitting control tension spring 304 is connected between the measuring shaft 303 and the measuring mounting plate 301. The measuring shaft 303 is used to move the measuring sleeve 4. The elastic support 2 can be adapted to be telescopic to ensure the measurement of the entire section of the tool handle. By adopting the telescopic movement method, the utilization rate of the CNC tool handle can be guaranteed, and the comprehensive measurement can be ensured without affecting the The CNC tool holder is fed into the workpiece for cutting. At the same time, the measurement installation method adopted by the present structure can be used for measurement during the normal cutting process of the CNC tool holder. The telescopic rotating arm 201 and the telescopic large arm 103 that expand outward will not affect the normal use length of the CNC tool holder, and can be better applied to longer CNC tool holders. It is also convenient to stop the machine for inspection in time after the accuracy deviation is found during measurement, thereby ensuring that the CNC tool holder can still be used for measurement when processing the workpiece; the limit frame 302 is used to limit the measuring shaft 303 to prevent the measuring shaft 303 from escaping from the measuring groove 4011.

[0037] In the embodiment of the present disclosure, the measuring sleeve 4 includes: a measuring installation cylinder 401 and a measuring groove 4011. The measuring groove 4011 is provided on the top of the measuring installation cylinder 401. The measuring shaft 303 is slidably fitted in the measuring groove 4011. The measuring installation cylinder 401 is used to be sleeved on the outside of the CNC tool handle. The measuring groove 4011 on the measuring installation cylinder 401 has flat end faces on both axial sides, and the measuring groove 4011 on the measuring installation cylinder 401 is an arc-shaped structure in the radial direction. The measuring sleeve 4 also includes: a protective ring 402, Two protective rings 402 are provided, and the two protective rings 402 are fixedly installed on both sides of the measuring installation tube 401 respectively; the protective ring 402 is an elastic structure, and the protective ring 402 is used to be sleeved on the outside of the CNC tool handle; the radial limit member 5 includes: a limit pressure regulating bolt 501, a wheel frame 502 and a radial limit roller 503, the limit pressure regulating bolt 501 is threadedly connected to the measuring installation tube 401; the end of the limit pressure regulating bolt 501 is provided with a hexagonal groove; the limit pressure regulating bolt 501 is rotatably mounted with a wheel frame 502; The wheel frame 502 is slidably mounted inside the measuring mounting cylinder 401; two radial limiting rollers 503 are rotatably mounted on the wheel frame 502; both radial limiting rollers 503 are arc-shaped structures; the outer sides of the two radial limiting rollers 503 are respectively provided with rubber coatings; the two radial limiting rollers 503 are respectively used for rolling and fitting the CNC tool handle; the radial limiting member 5 is used in conjunction with the measuring sleeve 4 to ensure that the structure can accurately measure the outer side of the tool handle, and the radial offset and swing error of the CNC tool handle can be measured at one time, wherein the radial swing is the radial load generated on the tool handle when the workpiece is driven to rotate by the CNC machine tool, especially the tool handle composed of two parts of the floating tool handle, the end of which is easily squeezed by the workpiece to cause radial rotation or distortion, and the swing error is when the concentric deviation between the machining hole of the workpiece and the tool handle is too large, exceeding the correctable range, resulting in non-concentric rotation of the machining hole of the tool handle, driving the rotation and swing of the end of the tool handle, rather than straight drilling, so that the overall coaxiality of the tool handle has a large deviation;At the same time, the present structure can test the reset accuracy of the CNC floating tool holder after being pressed, and the measurement is more comprehensive, more suitable for the measurement of longer and easily deformed CNC tool holders, and the measurement is efficient. The radial limit roller 503 can be radially limited for the CNC tool holder, which can facilitate the height measuring device 6 to accurately test the radial offset error of the CNC tool holder, and at the same time does not affect the axial rolling displacement of the radial limit roller 503 along the CNC tool holder, and adapts to the switching of the measuring position. When the limit guide 7 is moved by the workpiece, the measuring slot 4011 can move the measuring axis 303 along the axial direction of the CNC tool holder, driving the measuring mounting plate 301 to move. This process does not affect the elevation of the measuring axis 303. At the same time, once the CNC tool holder rotates radially, If the CNC tool holder is offset, or the CNC tool holder swings and deviates radially, it means that the radial deviation of the floating tool holder is large. At this time, the radial limiting roller 503 is radially close to the CNC tool holder for limiting. When the CNC tool holder is damaged and rotates radially, the measuring installation cylinder 401 is driven by the radial limiting roller 503 to rotate or swing at the same time, so that the measuring slot 4011 is controlled to push the measuring shaft 303 with the bottom arc structure, and the height measuring device 6 can be used for measuring. The measuring slot 4011 is used, and its bottom arc structure can be used to limit the measuring shaft 303. When the size of the CNC tool holder is accurate, under the torsion of two identical torsion springs 203, the limiting measuring shaft 303 is located in the middle of the measuring slot 4011. ;

[0038] In the disclosed embodiment, the height measuring device 6 includes: a height measuring frame 601 and an electronic ruler body 602. The electronic ruler body 602 can adopt a MNSDVH20 displacement sensor and its matching digital display controller 102. The height measuring frame 601 is fixedly mounted on the measuring mounting plate 301 by bolts; the electronic ruler body 602 is fixedly mounted on the height measuring frame 601; the measuring end of the electronic ruler body 602 is attached to the top of the measuring shaft 303; the electronic ruler body 602 is used to measure the accuracy deviation of the CNC tool holder; the electronic ruler body 602 is electrically connected to the digital display controller 102. By adopting the height measuring device 6, the dimensional deviation can be detected and prompted quickly, and the measurement can be continued during the machining process of the CNC tool holder. When the dimensional deviation occurs, the staff can quickly know it, so as to avoid the continuous use of the CNC tool holder with dimensional accuracy deviation to cause economic losses.

[0039] Embodiment 2, on the basis of embodiment 1, the limiting guide 7 comprises: a support column 701 and a bevel guide ring 702, the support column 701 is provided with a circle, and the circle of support columns 701 are respectively fixedly mounted on the side of the measuring mounting tube 401; the bevel guide ring 702 is mounted on the circle of support columns 701; the outer side of the bevel guide ring 702 is a bevel structure; the outer bevel structure of the bevel guide ring 702 is used to prevent chip congestion, and the limiting guide 7 can be used to achieve the process of machining of the CNC tool holder by fitting the bevel guide ring 702 to the workpiece to adapt and adjust the position of the measuring socket 4 to avoid the measuring socket 4 interfering with the machining, and the bevel guide ring 702 with a bevel structure can be used for chip discharge, which will not cause clogging between the measuring socket 4 and the workpiece, and prevent the accumulation of chips from affecting the machining quality, and the protective ring 402 can be sleeved on the outside of the CNC tool holder to scrape impurities such as cutting fluid in real time, so as to avoid the impurities affecting the radial anti-slip effect and axial rolling smoothness of the radial limiting roller 503.

[0040] The working principle of this embodiment is as follows: first, two measuring clamping blocks 101 are sleeved on the floating tool handle, connected by four bolts, and with the two torsion springs 203 applying torque, the telescopic rotating arm 201 can be driven to rotate, and the measuring mounting plate 301 is pushed to move elastically outward to achieve the longest measuring distance. When the tool head of the CNC tool handle contacts the workpiece for processing, as the tool handle is extended, the limit guide 7 can be attached to the workpiece. As the CNC tool handle continues to feed and advance, the inclined guide ring 702 of the inclined surface structure can be used for chip discharge, and at the same time drive the measuring mounting plate 301 to move outward. When the mounting plate 301 moves inward, the two telescopic rotating arms 201 will also be squeezed to expand outward to adapt to the measuring position of the measuring sleeve 4. The protective ring 402 can be sleeved on the outside of the CNC tool holder to scrape off impurities such as cutting fluid in real time. The measuring groove 4011 can toggle the measuring axis 303 to drive the measuring mounting plate 301 to move. This process does not affect the elevation of the measuring axis 303. At the same time, once the CNC tool holder is radially rotated and offset, or the CNC tool holder has a swing radial offset, it means that the radial deviation of the floating tool holder is large. At this time, the radial limit roller 503 is radially tightly attached. When the CNC tool handle rotates, the measuring installation cylinder 401 is driven to rotate at the same time, so that the measuring slot 4011 is controlled to utilize the bottom arc structure to increase the extrusion measuring shaft 303 when rotating. When the limit measuring shaft 303 is squeezed by the measuring slot 4011, the lifting and lowering can be achieved by pulling the fitting control tension spring 304 to fit the inner side of the measuring slot 4011. At this time, the electronic ruler body 602 can detect the deviation data, and the data can be displayed in real time through the digital display controller 102. At the same time, the verticality of the CNC tool handle does not meet the standard. When the measuring device 4010 is swinging, the measuring groove 4011 will also squeeze the limit measuring shaft 303 for detection. Similarly, the electronic ruler body 602 can also measure the data deviation. At the same time, when the CNC floating tool holder is deformed or cannot be reset, the height measuring device 6 can fit the limit measuring shaft 303 for size measurement, which is convenient for the height measuring device 6 to detect the data deviation. The staff can observe the digital display controller 102. This structure is more suitable for the measurement of non-rigidly connected tool holders such as CNC floating tool holders, and can discover the tool holder accuracy deviation more timely.

[0041] In this article, there are a few points to note:

[0042] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0043] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0044] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A numerical control tool handle accuracy measuring instrument, comprising a measuring mounting member (1), wherein two elastic supporting members (2) are mounted on the measuring mounting member (1); characterized in that: A telescopic limiting member (3) is installed on the two elastic supporting members (2); A measuring sleeve (4) is attached to the bottom of the telescopic limiter (3); the measuring sleeve (4) is used to measure the radial offset and swing of the CNC tool holder; Three radial stoppers (5) are installed inside the measuring sleeve (4); the three radial stoppers (5) are used to fit the axial rolling of the CNC tool handle; the three radial stoppers (5) are spaced at the same intervals; A height measuring device (6) is installed on the telescopic limiter (3); the height measuring device (6) is used for measuring the accuracy of a CNC tool handle; A limiting guide (7) is fixedly mounted on the measuring sleeve (4); the limiting guide (7) is used to guide the chips outwards; The measuring mounting member (1) comprises: a measuring clamping block (101) and a digital display controller (102); two measuring clamping blocks (101) are provided, and the two measuring clamping blocks (101) are connected by four bolts; the two measuring clamping blocks (101) are used for clamping and mounting on a numerical control tool handle; and the digital display controller (102) is fixedly mounted on the side of the measuring clamping block (101).

2. A CNC tool handle precision measuring instrument according to claim 1, characterized in that: The measuring mounting part (1) further comprises: a telescopic arm (103); the digital display controller (102) is externally connected to a power supply; two telescopic arms (103) are rotatably mounted on the measuring clamping block (101); and the digital display controller (102) is used to display the accuracy deviation.

3. A CNC tool handle precision measuring instrument according to claim 2, characterized in that: The elastic support member (2) comprises: a telescopic rotating arm (201), a torsion spring shaft (202) and a torsion spring (203); the telescopic rotating arm (201) is located inside the telescopic large arm (103); the torsion spring shaft (202) is fixedly mounted on the telescopic rotating arm (201); the torsion spring shaft (202) is rotatably plugged into the end of the telescopic large arm (103); the torsion spring (203) is sleeved on the torsion spring shaft (202); the two ends of the torsion spring (203) are respectively connected between the telescopic large arm (103) and the torsion spring shaft (202); the torsion spring (203) is used for torque control of the outward expansion of the telescopic rotating arm (201).

4. A CNC tool handle precision measuring instrument according to claim 3, characterized in that: The telescopic limit member (3) comprises: a measuring installation plate (301) and a limit frame (302); the two ends of the measuring installation plate (301) are rotatably mounted on the other ends of the two telescopic rotating arms (201); the limit frame (302) is mounted on the side of the measuring installation plate (301) by bolts; the limit frame (302) is a "U"-shaped structure; the limit frame (302) is located outside the CNC tool handle; and a through hole is provided in the middle of the measuring installation plate (301).

5. The CNC tool handle precision measuring instrument according to claim 4, characterized in that: The telescopic limit member (3) further comprises: a measuring shaft (303) and a fitting control tension spring (304); the measuring shaft (303) is slidably inserted into a through hole in the middle of the measuring mounting plate (301); the bottom of the measuring shaft (303) is a hemispherical structure; a fitting control tension spring (304) is sleeved on the measuring shaft (303); the fitting control tension spring (304) is connected between the measuring shaft (303) and the measuring mounting plate (301); and the measuring shaft (303) is used to move the measuring sleeve member (4).

6. The CNC tool handle precision measuring instrument according to claim 5, characterized in that: The measuring sleeve (4) comprises: a measuring installation cylinder (401) and a measuring groove (4011); the measuring installation cylinder (401) is provided with a measuring groove (4011) at the top; a measuring shaft (303) is slidably fitted in the measuring groove (4011); the measuring installation cylinder (401) is used to be sleeved on the outside of a numerical control tool handle; the measuring groove (4011) on the measuring installation cylinder (401) has flush end surfaces on both axial sides, and the measuring groove (4011) on the measuring installation cylinder (401) is an arc-shaped structure in the radial direction.

7. The CNC tool handle precision measuring instrument according to claim 6, characterized in that: The measuring sleeve (4) further comprises: a protective ring (402), two protective rings (402) are provided, and the two protective rings (402) are respectively fixedly mounted on both sides of the measuring mounting tube (401); the protective ring (402) is an elastic structure, and the protective ring (402) is used to be sleeved on the outside of the CNC tool handle.

8. The CNC tool handle precision measuring instrument according to claim 6, characterized in that: The radial limiting member (5) comprises: a limiting pressure regulating bolt (501), a wheel frame (502) and a radial limiting roller (503); the limiting pressure regulating bolt (501) is threadedly connected to the measuring installation tube (401); a hexagonal groove is provided at the end of the limiting pressure regulating bolt (501); a wheel frame (502) is rotatably mounted on the limiting pressure regulating bolt (501); the wheel frame (502) is slidably mounted inside the measuring installation tube (401); two radial limiting rollers (503) are rotatably mounted on the wheel frame (502); both radial limiting rollers (503) are of arc-shaped structure; rubber coatings are respectively provided on the outer sides of the two radial limiting rollers (503); and the two radial limiting rollers (503) are respectively used for rolling and fitting the CNC tool handle.

9. The CNC tool handle precision measuring instrument according to claim 4, characterized in that: The height measuring device (6) comprises: a height measuring frame (601) and an electronic ruler body (602); the height measuring frame (601) is fixedly mounted on a measuring mounting plate (301) by means of bolts; the electronic ruler body (602) is fixedly mounted on the height measuring frame (601); the measuring end of the electronic ruler body (602) is attached to the top of a measuring shaft (303); the electronic ruler body (602) is electrically connected to a digital display controller (102); and the electronic ruler body (602) is used to measure the precision deviation of a numerically controlled tool holder.

10. The CNC tool handle accuracy measuring instrument according to claim 5, characterized in that: The position limiting guide member (7) comprises: a support column (701) and a bevel guide ring (702); the support column (701) is provided with a circle, and the circle of support columns (701) are respectively fixedly mounted on the side of the measuring mounting tube (401); the bevel guide ring (702) is mounted on the circle of support columns (701); the outer side of the bevel guide ring (702) is a bevel structure; the outer bevel structure of the bevel guide ring (702) is used to prevent chip congestion.

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