A high-precision tool setting device for CNC machine tools and its tool setting system

Abstract

The present invention relates to the technical field of numerical control machine tools, and provides a high-precision tool setting device for numerical control machine tools and a tool setting system thereof, including a protective cover, mounting seats are fixed on both sides of the protective cover, and a hinged seat is hinged at the bottom of the protective cover. The present invention is provided with a measuring component, and the tool is manually controlled to contact with the detection head, and the detection head touches the tool. Under the action of the reset spring, the connecting seat will be offset. According to the lever principle, the connecting seat will drive the transmission rod to squeeze the ball, and the pressure sensor will record the pressure change of the ball. According to the corresponding change value of the pressure sensor, the signal board will input the corresponding coordinate position of each tool head to the machine tool control system, complete the tool length and tool diameter measurement and correction, and amplify the tiny displacement through the lever principle, thereby improving the measurement accuracy of the tool setting device, greatly reducing the tool setting time, and thus improving the tool setting efficiency of the high-precision tool setting device of the numerical control machine tool.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled machine tools, and in particular to a high-precision tool setting device for numerically controlled machine tools and a tool setting system thereof. Background Art

[0002] With the rapid development of science and technology, my country's mechanical processing industry has entered a new stage. CNC machine tools are important equipment for automation and precision processing in mechanical processing. Through computer control systems, automatic processing can be achieved, and various complex processing tasks can be completed with extremely high precision to ensure the stability and precision of product quality. Before processing, CNC machine tools need to calibrate the tools used, so a high-precision tool setting device for CNC machine tools will be used;

[0003] Existing CNC machine tools generally use manual tool setting when setting the tool. By manually controlling the machine tool, the tool is brought into contact with the workpiece to be processed, which is used as a reference for inputting processing data. However, this method is time-consuming and labor-intensive, has low processing accuracy, and is prone to tool collision, making it inefficient when used. Summary of the invention

[0004] The object of the present invention is to provide a high-precision tool setting device for a numerically controlled machine tool and a tool setting system thereof, so as to solve the defect that the existing tool setting device for numerically controlled machine tools has low precision.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-precision tool setting device for a CNC machine tool, comprising a protective cover;

[0006] Mounting seats are fixed on both sides of the protective cover, an articulated seat is hinged on the bottom of the protective cover, a swing arm is fixed on the top of the articulated seat, a measuring assembly is fixedly installed on one end of the swing arm by bolts, the measuring assembly comprises a fixing flange, a reset spring, a shell, a limit seat, a ball and a connecting seat, the fixing flange is fixedly installed on one end of the swing arm by bolts, a reset spring is fixedly installed at the middle position of one end of the fixing flange, a connecting seat is fixedly installed on one end of the reset spring, a shell is arranged on the outside of the connecting seat, thread grooves are evenly arranged on the outer wall of the connecting seat close to one end of the reset spring, a transmission rod is threadedly connected inside the thread grooves, a wire tube is fixed on the outer wall of the shell away from one end of the fixing flange, a limit seat is installed on one end of the shell away from the fixing flange by bolts, a detection groove is evenly arranged on one side of the limit seat, pressure sensors are fixedly installed on both sides of the detection groove, a ball is arranged on one side of the pressure sensor, and a limit groove is arranged on one side of the detection groove inside the limit seat;

[0007] One end of the connecting seat extends to the outside of the shell and is threadedly connected with a protective component;

[0008] A tool setting assembly is fixedly mounted on one end of the protection assembly.

[0009] Preferably, one side of the mounting seat and one side of the protective cover are located in the same plane, reinforcing ribs are evenly fixed on the other side of the mounting seat, a rounded corner is provided at one end of the hinged seat away from the swing arm, and the rotating shaft of the hinged seat is externally connected to a driving device.

[0010] Preferably, one end of the shell is fixedly connected to one end of the fixing flange by bolts, the output end of the pressure sensor is electrically connected to the input end of the CNC machine control system through a signal board, and six groups of pressure sensors are provided, and the six groups of pressure sensors correspond to the movement directions of the X-axis, Y-axis and Z-axis of the CNC machine tool respectively.

[0011] Preferably, three groups of thread grooves are provided, and the three groups of thread grooves are evenly spaced on the outer wall of the connecting seat. One group of thread grooves is located at the bottom end of the connecting seat and is perpendicular to the horizontal plane. A mounting block is fixed on the outer wall of the transmission rod close to one end of the connecting seat, and the outer side wall of one end of the transmission rod is in contact with one side of the ball.

[0012] Preferably, the protective assembly includes a connecting belt, a fixing rod, a protective seat, a plastic rod and a fixing bolt, the fixing rod is threadedly connected to the inside of one end of the connecting seat, one end of the fixing rod extends to the outside of the connecting seat and is fixed with the protective seat, one end of the protective seat is fixed with the plastic rod, a connecting belt is provided under the protective seat, one end of the connecting belt is fixed with a first connecting ring, the other end of the connecting belt is fixed with a second connecting ring, and a fixing bolt passes through the inside of the second connecting ring.

[0013] Preferably, the first connecting ring is sleeved on the outer side of the fixing rod at one end of the protective seat, and planes are evenly formed on the outer wall of the protective seat.

[0014] Preferably, the tool setting assembly includes a fixed seat, a leveling bolt, a locking bolt and a detection head. The fixed seat is sleeved on the outside of the plastic rod, one side of the plastic rod inside the fixed seat is threadedly connected with the leveling bolt, the top of the fixed seat is inserted with a detection head, and one side of the detection head inside the fixed seat is threadedly connected with the locking bolt.

[0015] Preferably, chamfers are provided at edge positions at both ends of the fixing seat, and the bottom end of the fixing seat is threadedly connected to a fixing bolt.

[0016] Preferably, one end of the leveling bolt abuts against one side of the plastic rod, and one end of the locking bolt abuts against one side of the detection head.

[0017] A tool setting system for a high-precision tool setting device of a numerically controlled machine tool comprises the following steps:

[0018] S1. The protective cover is fixedly mounted on the inner wall of the machine tool on one side of the CNC machine tool fixture seat through the mounting base, and the protective cover is kept perpendicular to the horizontal plane. The data line inside the wire tube is connected to the CNC machine tool circuit through the signal board, and the output end of the pressure sensor is electrically connected to the input end of the CNC machine tool control system through the signal board;

[0019] S2. The driving device drives the hinge seat to rotate, so that the hinge seat drives the swing arm to move to the outside of the protective cover;

[0020] S3. Fix the detection head to the top of the fixing base by locking the bolt, rotate the fixing base so that the fixing base rotates on the outside of the plastic rod, adjust the top of the detection head to the level by the level meter and fix the fixing base to the plastic rod by the leveling bolt;

[0021] S4. Install the tool to be used on the tool holder of the machine tool, manually control the machine tool to move the tool holder to the top of the detection head, and control the tool to contact the detection head in turn. The detection head touches the tool, and under the action of the reset spring, the connecting seat will be offset. According to the lever principle, the connecting seat will drive the transmission rod to squeeze the ball, and the pressure sensor will record the pressure change of the ball. According to the corresponding change value of the pressure sensor, the signal board will input the corresponding coordinate position of each tool head to the machine tool control system to complete the tool length and tool diameter measurement and correction;

[0022] S5. After the tool setting is completed, the driving device drives the articulated seat to rotate, so that the articulated seat drives the swing arm to move to the inside of the protective cover.

[0023] The high-precision tool setting device and tool setting system for a CNC machine tool provided by the present invention have the following advantages:

[0024] By setting a measuring component, the tool is manually controlled to contact the detection head, and the detection head touches the tool. Under the action of the reset spring, the connecting seat will be offset. According to the lever principle, the connecting seat will drive the transmission rod to squeeze the ball. The pressure sensor will record the pressure change of the ball. According to the corresponding change value of the pressure sensor, the signal board will input the corresponding coordinate position of each tool head to the machine tool control system to complete the tool length and tool diameter measurement and correction. The tiny displacement is amplified by the lever principle, which improves the measurement accuracy of the tool setting equipment and greatly reduces the tool setting time, thereby improving the tool setting efficiency of the high-precision tool setting equipment of the CNC machine tool;

[0025] Furthermore, the detection head is fixed to the top of the fixing seat by a locking bolt, and the fixing seat sleeve is arranged on the outside of the plastic rod. The inclination of the top of the detection head can be adjusted by rotating the fixing seat, which is convenient for leveling the detection head. After leveling, the fixing seat and the plastic rod are fixed by the leveling bolt, realizing the function of the tool setting device to facilitate rapid leveling, thereby improving the convenience of the high-precision tool setting device of the CNC machine tool when in use;

[0026] Furthermore, when misoperation occurs, the tool and the detection head collide violently, and the connecting seat will conflict with the inner wall of one end of the shell, preventing the transmission rod from being overloaded and causing the ball to exert excessive pressure on the pressure sensor, thereby damaging the pressure sensor. At the same time, the connection between the plastic rod and the protective seat will be disconnected, thereby preventing damage to the detection head and the tool head. The connecting belt will connect the protective seat and the fixed seat through the first connecting ring and the second connecting ring, thereby preventing the detection head from falling and being lost. The protective seat and the plastic rod can be replaced and reinstalled for use. After the tool setting is completed, the swing arm is moved to the inside of the protective cover, thereby further improving the safety of the device and extending the service life of the high-precision tool setting equipment of the CNC machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view schematic diagram of the present invention;

[0028] Figure 2 It is a schematic front view of the storage state of the present invention;

[0029] Figure 3 It is a side view schematic diagram of the present invention;

[0030] Figure 4 It is a rear view schematic diagram of the present invention;

[0031] Figure 5 It is a partial cross-sectional schematic diagram of the front view of the tool setting assembly of the present invention;

[0032] Figure 6 It is a schematic diagram of a front cross-section of a detection component of the present invention from a first viewing angle;

[0033] Figure 7 It is a schematic diagram of a front cross-section of the detection assembly of the present invention from a second viewing angle;

[0034] Figure 8 This is a schematic diagram of the detection assembly of the present invention from a front view explosion first perspective;

[0035] Fig. 9 It is a schematic diagram of the detection component of the present invention exploded from a main perspective and a second perspective;

[0036] Fig.10 It is a partial enlarged schematic diagram of the detection component of the present invention;

[0037] Fig.11 It is a schematic diagram of the tool setting system of the present invention.

[0038] Explanation of the reference numerals in the figure: 1. Protective cover; 11. Mounting seat; 12. Articulated seat; 13. Swing arm; 2. Measuring assembly; 21. Fixed flange; 22. Reset spring; 23. Shell; 231. Wire tube; 24. Limit seat; 241. Detection groove; 242. Limit groove; 243. Pressure sensor; 25. Ball; 26. Connecting seat; 261. Threaded groove; 262. Transmission rod; 3. Protective assembly; 31. Connecting belt; 311. First connecting ring; 312. Second connecting ring; 32. Fixed rod; 33. Protective seat; 34. Plastic rod; 35. Fixed bolt; 4. Tool setting assembly; 41. Fixed seat; 42. Leveling bolt; 43. Locking bolt; 44. Detection head. DETAILED DESCRIPTION

[0039] 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.

[0040] See also Figure 1-Figure 11 The present invention provides a high-precision tool setting device for a numerically controlled machine tool, comprising a protective cover 1.

[0041] Reference Figure 1 and Figure 6-Figure 10As shown, mounting seats 11 are fixed on both sides of the protective cover 1, a hinge seat 12 is hinged on the bottom of the protective cover 1, one side of the mounting seat 11 and one side of the protective cover 1 are located in the same plane, and reinforcing ribs are evenly fixed on the other side of the mounting seat 11, and a rounded corner is arranged at one end of the hinge seat 12 away from the swing arm 13, the rotating shaft of the hinge seat 12 is externally connected to the driving device, the swing arm 13 is fixed on the top of the hinge seat 12, and a measuring component 2 is fixedly installed on one end of the swing arm 13 by bolts, and the measuring component 2 includes a fixing flange 21, a reset spring 22, and a housing 23. , a limit seat 24, a ball 25 and a connecting seat 26, the fixing flange 21 is fixedly installed on one end of the swing arm 13 by bolts, a reset spring 22 is fixedly installed at the middle position of one end of the fixing flange 21, a connecting seat 26 is fixedly installed at one end of the reset spring 22, a shell 23 is arranged on the outer side of the connecting seat 26, thread grooves 261 are evenly opened on the outer wall of the connecting seat 26 close to one end of the reset spring 22, a transmission rod 262 is threadedly connected to the inner part of the thread groove 261, and a shell 23 is fixed on the outer wall of the shell 23 away from the fixing flange 21. The wire tube 231, the end of the housing 23 away from the fixed flange 21 is fixed with a limit seat 24 by bolts, one side of the limit seat 24 is evenly provided with a detection groove 241, both sides of the detection groove 241 are fixedly installed with a pressure sensor 243, one side of the pressure sensor 243 is provided with a ball 25, one side of the detection groove 241 in the limit seat 24 is provided with a limit groove 242, one end of the housing 23 is fixedly connected to one end of the fixed flange 21 by bolts, and the output end of the pressure sensor 243 is connected to the digital signal board through the signal board. The input end of the CNC machine tool control system is electrically connected, six groups of pressure sensors 243 are provided, and the six groups of pressure sensors 243 correspond to the movement directions of the X-axis, Y-axis and Z-axis of the CNC machine tool respectively, and three groups of thread grooves 261 are provided. The three groups of thread grooves 261 are evenly spaced on the outer wall of the connecting seat 26, and one group of thread grooves 261 is located at the bottom end of the connecting seat 26 and is perpendicular to the horizontal plane. A mounting block is fixed on the outer wall of the transmission rod 262 close to one end of the connecting seat 26, and the outer side wall of one end of the transmission rod 262 contacts one side of the ball 25.

[0042] The tool to be used is installed on the tool holder of the machine tool, and the machine tool is manually controlled to move the tool holder to the top of the detection head 44, and the tool is controlled to contact the detection head 44 in turn. The detection head 44 touches the tool, and under the action of the reset spring 22, the connecting seat 26 will be offset. According to the lever principle, the connecting seat 26 will drive the transmission rod 262 to squeeze the ball 25, and the pressure sensor 243 will record the pressure change of the ball 25. According to the corresponding change value of the pressure sensor 243, the signal board will input the corresponding coordinate position of each tool head to the machine tool control system to complete the tool length and tool diameter measurement and correction.

[0043] Reference Figure 4-Figure 7As shown, one end of the connecting seat 26 extends to the outside of the shell 23 and is threadedly connected to the protective component 3, the protective component 3 includes a connecting belt 31, a fixing rod 32, a protective seat 33, a plastic rod 34 and a fixing bolt 35, the fixing rod 32 is threadedly connected to the inside of one end of the connecting seat 26, one end of the fixing rod 32 extends to the outside of the connecting seat 26 and is fixed with the protective seat 33, one end of the protective seat 33 is fixed with the plastic rod 34, a connecting belt 31 is arranged below the protective seat 33, one end of the connecting belt 31 is fixed with a first connecting ring 311, the other end of the connecting belt 31 is fixed with a second connecting ring 312, the interior of the second connecting ring 312 is penetrated by a fixing bolt 35, the first connecting ring 311 is sleeved on the outside of the fixing rod 32 at one end of the protective seat 33, and the outer wall of the protective seat 33 is evenly provided with flat surfaces.

[0044] The first connecting ring 311 is sleeved on the outer side of the fixing rod 32, and the protective seat 33 is rotated so that the protective seat 33 drives the fixing rod 32 to be threadedly connected with one end of the connecting seat 26, thereby fixing the protective seat 33 with one end of the connecting seat 26, and sleeved the second connecting ring 312 on the outer side of the fixing bolt 35, and the fixing bolt 35 is rotated so that the fixing bolt 35 is threadedly connected with the bottom end of the fixing seat 41. When misoperation occurs, the tool and the detection head 44 collide violently, and the connection between the plastic rod 34 and the protective seat 33 will be disconnected. The connecting belt 31 will connect the protective seat 33 and the fixing seat 41 through the first connecting ring 311 and the second connecting ring 312, thereby preventing the detection head 44 from falling and being lost. The protective seat 33 and the plastic rod 34 can be replaced and reinstalled for use.

[0045] Reference Figure 1 and Figure 5 As shown, a tool setting component 4 is fixedly installed at one end of the protection component 3, and the tool setting component 4 includes a fixing seat 41, a leveling bolt 42, a locking bolt 43 and a detection head 44. The fixing seat 41 is sleeved on the outside of the plastic rod 34, and one side of the plastic rod 34 inside the fixing seat 41 is threadedly connected with the leveling bolt 42, and the detection head 44 is inserted at the top of the fixing seat 41, and one side of the detection head 44 inside the fixing seat 41 is threadedly connected with the locking bolt 43, chamfers are provided at the edge positions of both ends of the fixing seat 41, the bottom end of the fixing seat 41 is threadedly connected with the fixing bolt 35, one end of the leveling bolt 42 conflicts with one side of the plastic rod 34, and one end of the locking bolt 43 conflicts with one side of the detection head 44.

[0046] The detection head 44 is fixed to the top of the fixing seat 41 by the locking bolt 43. The fixing seat 41 is sleeved on the outside of the plastic rod 34. The inclination of the top of the detection head 44 can be adjusted by rotating the fixing seat 41 to facilitate the leveling of the detection head 44. After leveling, the fixing seat 41 and the plastic rod 34 are fixed by the leveling bolt 42.

[0047] A tool setting system for a high-precision tool setting device of a numerically controlled machine tool comprises the following steps:

[0048] S1. The protective cover 1 is fixedly mounted on the inner wall of the machine tool on one side of the CNC machine tool fixture seat through the mounting seat 11, and the protective cover 1 is kept perpendicular to the horizontal plane, and the data line inside the wire tube 231 is connected to the CNC machine tool circuit through the signal board, so that the output end of the pressure sensor 243 is electrically connected to the input end of the CNC machine tool control system through the signal board;

[0049] S2. The hinge seat 12 is driven to rotate by the driving device, so that the hinge seat 12 drives the swing arm 13 to move to the outside of the protective cover 1;

[0050] S3. The detection head 44 is fixed to the top of the fixing base 41 by the locking bolt 43, the fixing base 41 is rotated so that the fixing base 41 rotates on the outside of the plastic rod 34, the top of the detection head 44 is adjusted to a horizontal level by the leveling bolt 42 and the fixing base 41 is fixed to the plastic rod 34;

[0051] S4. Install the tool to be used on the tool holder of the machine tool, manually control the machine tool to move the tool holder to the top of the detection head 44, and control the tool to contact the detection head 44 in turn. The detection head 44 touches the tool, and under the action of the reset spring 22, the connecting seat 26 will be offset. According to the lever principle, the connecting seat 26 will drive the transmission rod 262 to squeeze the ball 25, and the pressure sensor 243 will record the pressure change of the ball 25. According to the corresponding change value of the pressure sensor 243, the signal board will input the corresponding coordinate position of each tool head to the machine tool control system to complete the tool length and tool diameter measurement and correction;

[0052] S5. After the tool setting is completed, the driving device drives the articulated seat 12 to rotate, so that the articulated seat 12 drives the swing arm 13 to move to the inside of the protective cover 1.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision tool setting device for a CNC machine tool, comprising a protective cover (1); Features: Mounting seats (11) are fixed on both sides of the protective cover (1). A hinge seat (12) is hingedly connected to the bottom of the protective cover (1). A swing arm (13) is fixed to the top of the hinge seat (12). A measuring assembly (2) is fixedly mounted on one end of the swing arm (13) by means of bolts. The measuring assembly (2) comprises a fixing flange (21), a return spring (22), a housing (23), a limit seat (24), a ball (25) and a connecting seat (26). The fixing flange (21) is fixedly mounted on one end of the swing arm (13) by means of bolts. A return spring (22) is fixedly mounted at a middle position of one end of the fixing flange (21). A connecting seat (26) is fixedly mounted on one end of the return spring (22). The housing (23) is arranged on the outer side of the connecting seat (26). , the outer wall of the connecting seat (26) close to one end of the return spring (22) is uniformly provided with threaded grooves (261), the interior of the threaded grooves (261) is threadedly connected with a transmission rod (262), a wire tube (231) is fixed on the outer wall of one end of the housing (23) away from the fixed flange (21), the end of the housing (23) away from the fixed flange (21) is bolted to a limit seat (24), one side of the limit seat (24) is uniformly provided with detection grooves (241), both sides of the detection groove (241) are fixedly provided with pressure sensors (243), one side of the pressure sensor (243) is provided with a ball (25), and one side of the detection groove (241) in the limit seat (24) is provided with a limit groove (242); One end of the connecting seat (26) extends to the outside of the shell (23) and is threadedly connected to the protective assembly (3), the protective assembly (3) comprising a connecting belt (31), a fixing rod (32), a protective seat (33), a plastic rod (34) and a fixing bolt (35), the fixing rod (32) being threadedly connected to the inside of one end of the connecting seat (26), one end of the fixing rod (32) extending to the outside of the connecting seat (26) and being fixed to the protective seat (33), one end of the protective seat (33) being fixed to the plastic rod (34), a connecting belt (31) being arranged below the protective seat (33), one end of the connecting belt (31) being fixed to a first connecting ring (311), the other end of the connecting belt (31) being fixed to a second connecting ring (312), the inside of the second connecting ring (312) being penetrated by a fixing bolt (35); A tool setting assembly (4) is fixedly mounted on one end of the protection assembly (3), the tool setting assembly (4) comprising a fixing seat (41), a leveling bolt (42), a locking bolt (43) and a detection head (44), the fixing seat (41) being sleeved on the outside of the plastic rod (34), one side of the plastic rod (34) inside the fixing seat (41) being threadedly connected to the leveling bolt (42), the top end of the fixing seat (41) being inserted with the detection head (44), and one side of the detection head (44) inside the fixing seat (41) being threadedly connected to the locking bolt (43).

2. The high-precision tool setting device for a CNC machine tool according to claim 1, characterized in that: One side of the mounting seat (11) and one side of the protective cover (1) are located in the same plane, and reinforcing ribs are evenly fixed to the other side of the mounting seat (11). An end of the hinge seat (12) away from the swing arm (13) is provided with a rounded corner, and the rotating shaft of the hinge seat (12) is externally connected to a driving device.

3. The high-precision tool setting device for a CNC machine tool according to claim 1, characterized in that: One end of the housing (23) is fixedly connected to one end of the fixing flange (21) via bolts, and an output end of the pressure sensor (243) is electrically connected to an input end of a numerical control machine control system via a signal board. Six groups of the pressure sensors (243) are provided, and the six groups of the pressure sensors (243) correspond to the movement directions of the X-axis, Y-axis and Z-axis of the numerical control machine tool, respectively.

4. The high-precision tool setting device for a CNC machine tool according to claim 1, characterized in that: The thread grooves (261) are provided in three groups, and the three groups of thread grooves (261) are distributed at equal intervals on the outer wall of the connecting seat (26), and one group of thread grooves (261) is located at the bottom end of the connecting seat (26) and is perpendicular to the horizontal plane. A mounting block is fixed to the outer wall of one end of the transmission rod (262) close to the connecting seat (26), and the outer side wall of one end of the transmission rod (262) contacts one side of the ball (25).

5. The high-precision tool setting device for a CNC machine tool according to claim 1, characterized in that: The first connecting ring (311) is sleeved on the outside of a fixing rod (32) at one end of the protection seat (33), and flat surfaces are evenly formed on the outer wall of the protection seat (33).

6. The high-precision tool setting device for a CNC machine tool according to claim 1, characterized in that: Chamfers are provided at the edge positions of both ends of the fixing seat (41), and the bottom end of the fixing seat (41) is threadedly connected to the fixing bolt (35).

7. The high-precision tool setting device for a CNC machine tool according to claim 1, characterized in that: One end of the leveling bolt (42) abuts against one side of the plastic rod (34), and one end of the locking bolt (43) abuts against one side of the detection head (44).

8. A tool setting system using the high-precision tool setting device for a CNC machine tool as claimed in claim 1, characterized in that: S1. The protective cover (1) is fixedly mounted on the inner wall of the CNC machine tool on one side of the fixture seat of the CNC machine tool through the mounting seat (11), and the protective cover (1) is kept perpendicular to the horizontal plane, and the data line inside the wire tube (231) is connected to the CNC machine tool circuit through the signal board, so that the output end of the pressure sensor (243) is electrically connected to the input end of the CNC machine tool control system through the signal board; S2. The articulated seat (12) is driven to rotate by the driving device, so that the articulated seat (12) drives the swing arm (13) to move to the outside of the protective cover (1); S3. Fix the detection head (44) to the top of the fixing base (41) by means of the locking bolt (43), rotate the fixing base (41) so that the fixing base (41) rotates on the outside of the plastic rod (34), adjust the top of the detection head (44) to a horizontal level by means of a leveling bolt (42), and fix the fixing base (41) to the plastic rod (34); S4. The tool to be used is mounted on the tool holder of the machine tool, and the machine tool is manually controlled to move the tool holder to the top of the detection head (44), and the tool is controlled to contact the detection head (44) in turn. The detection head (44) touches the tool, and under the action of the reset spring (22), the connecting seat (26) will be offset. According to the lever principle, the connecting seat (26) will drive the transmission rod (262) to squeeze the ball (25), and the pressure sensor (243) will record the pressure change of the ball (25). According to the corresponding change value of the pressure sensor (243), the signal board will input the corresponding coordinate position of each tool head to the machine tool control system to complete the tool length and tool diameter measurement and correction; S5. After the tool setting is completed, the driving device drives the articulated seat (12) to rotate, so that the articulated seat (12) drives the swing arm (13) to move to the inside of the protective cover (1).

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