Hardness detection device for numerical control tool production

Abstract

The invention belongs to the technical field of numerical control tool production, and particularly relates to a hardness detection device for numerical control tool production. A detection head is mounted in the middle of the detection machine body; the middle part of the detection machine body is fixedly connected with a first fixing frame; the inner wall of the first fixing frame is slidably connected with a toothed rail. The outer wall of the toothed rail is fixedly connected with two sets of supporting pieces. The middle of the supporting piece is rotationally connected with a tooth block, and the tooth block and the tooth rail are arranged in a mutually-meshed mode. The top of the toothed rail is fixedly connected with a tray, and the tray is located at the bottom of the detection head. The middle of the tray is slidably connected with a fixing strip. By means of the matched fixing strips, the problem that materials placed in the middle of the tray are in irregular shapes, so that the materials are difficult to clamp and fix through original planar fixing strips can be solved, the follow-up detection precision of the materials is improved, meanwhile, in the descending process of the tray, the fixing work on the materials can be loosened, and the material mounting and dismounting time is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of CNC tool production, in particular to a hardness detection device for CNC tool production. Background Art

[0002] CNC tools are important tools used for cutting in mechanical manufacturing. They are used in conjunction with CNC machine tools. They can improve processing efficiency and ensure processing quality. They can be divided into high-speed steel tools, carbide tools, diamond tools, etc. according to their materials.

[0003] The hardness can indirectly reflect the strength of the tool. During the production process, hardness testing equipment is usually used to conduct hardness testing, and the tool carrying mechanism, hardness testing mechanism and lifting mechanism are set up to ensure that its quality and performance meet the standards.

[0004] Through long-term observation, although the existing hardness testing equipment can test the cutting tools, the appearance of some cutting heads is usually irregular, which makes it difficult to fix the cutting heads with a flat fixture, resulting in the position being offset and misaligned during subsequent material testing, and the problem of low accuracy of the test data; therefore, a hardness testing device for CNC cutting tool production is proposed to address the above problems. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the present invention provides a hardness detection device for CNC tool production.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a hardness detection device for CNC tool production described in the present invention comprises a detection machine body; a detection head is installed in the middle of the detection machine body; a first fixed frame is fixedly connected to the middle of the detection machine body; a rack is slidably connected to the inner wall of the first fixed frame; two groups of support members are fixedly connected to the outer wall of the rack; a tooth block is rotatably connected to the middle of the support member, and the tooth block and the rack are meshed with each other; a tray is fixedly connected to the top of the rack, and the tray is located at the bottom of the detection head; a fixed strip is slidably connected to the middle of the tray; a second fixed frame is fixedly connected to the side wall of the rack; two groups of rotating wheels are rotatably connected to the middle of the second fixed frame; a connecting cloth strip is fixedly connected to the end of the fixing strip, and the connecting cloth strip is arranged to penetrate the middle of the two groups of rotating wheels; the other end of the connecting cloth strip is fixedly connected to the middle of the detection machine body.

[0007] Preferably, a sliding rod is slidably connected to the middle part of the tooth block; a top plate is fixedly connected to the middle part of the sliding rod, and the top plate is arranged on the inner wall of the tooth block; a first elastic member is fixedly connected to the middle part of the top plate, and the other end of the first elastic member is fixedly connected to the inner wall of the tooth block; a first fixed block is fixedly connected to the end of the first elastic member, and the first fixed block is arranged in a polygonal shape; two groups of bayonet pins are fixedly connected to the end of the first fixed block; a plurality of groups of inner grooves are arranged in a circular array on the outer wall of the first fixing frame, and the inner grooves and the bayonet pins are arranged in shape matching.

[0008] Preferably, a cavity is fixedly connected to the outer wall of the first fixing frame; a guide plate is fixedly connected to the top of the cavity, and the middle part of the guide plate is trumpet-shaped; a connecting pipe is fixedly connected to the bottom of the guide plate, and the output end of the connecting pipe is located inside the first fixing frame; a first bracket is fixedly connected to the bottom of the second fixing frame; and a piston plate is fixedly connected to the bottom of the first bracket.

[0009] Preferably, the side wall of the tray is rotatably connected to a screw rod; the middle part of the screw rod is threadedly connected to a second bracket; the end of the second bracket is fixedly connected to two groups of limit rods, and the limit rods are slidably arranged on the top of the tray; the end of the limit rod is fixedly connected to a pressure plate.

[0010] Preferably, two groups of second fixing blocks are fixedly connected to the inner wall of the tray; magnetic blocks are fixedly connected to the ends of the second fixing blocks; and two groups of magnetic strips are fixedly connected to the outer wall of the fixing strip, and the magnetic strips and the magnetic blocks are arranged to attract each other.

[0011] Preferably, a plurality of groups of spring columns are fixedly connected to the inner wall of the pressure plate; and a fixing pad is fixedly connected to the output end of the spring column.

[0012] Preferably, a plurality of groups of second elastic members are fixedly connected to the top of the piston plate; a counterweight body is fixedly connected to the top of the second elastic member, and the plurality of groups of counterweight bodies are spherically arranged.

[0013] Preferably, a plurality of groups of filters are fixedly connected to the inner wall of the output end of the connecting pipe.

[0014] Preferably, the end of the slide rod is rotatably connected to a rotating handle, and the middle portion of the rotating handle is concave.

[0015] Beneficial effects of the present invention:

[0016] 1. The present invention provides a hardness detection device for CNC tool production. By cooperating with the set fixing strips, the problem that the material placed in the middle of the tray is irregular in shape, making it difficult for the original flat fixing strips to clamp and fix the material can be reduced, thereby improving the accuracy of subsequent material testing. At the same time, when the tray is descending, the fixing work on the material can be loosened to reduce the time for installing and disassembling the material.

[0017] 2. The present invention provides a hardness testing device for CNC tool production. Through the action of the bayonet and the inner groove, the problem that the staff needs to use tools to continuously fix the end of the tooth block to support the pallet when testing the hardness of the material can be reduced, the trouble caused by the testing process can be reduced, and the flexibility of the tooth block when in use can be improved. Under the action of the polygonal first fixed block, the stability of the entire slide bar when moving on the inner wall of the tooth block can be improved, and the problem of shaking of the slide bar when working on the inner wall of the tooth block can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 is a schematic structural diagram of the first fixing frame in the present invention;

[0021] Figure 3 It is a schematic diagram of the rack structure in the present invention;

[0022] Figure 4 It is a schematic diagram of the gear block structure in the present invention;

[0023] Figure 5 It is a schematic diagram of the cavity structure in the present invention;

[0024] Figure 6 It is a schematic diagram of the fixing bar structure in the present invention;

[0025] Figure 7 It is a schematic diagram of the pressing plate structure in the present invention;

[0026] Figure 8 for Figure 7 Enlarged view of point A.

[0027] Legend:

[0028] 1. Detection machine body; 11. Detection head; 12. First fixed frame; 13. Gear rail; 14. Support member; 15. Gear block; 16. Tray; 17. Fixing strip; 18. Second fixed frame; 19. Rotating wheel; 110. Connecting cloth strip; 2. Sliding rod; 21. Top plate; 22. First elastic member; 23. First fixed block; 24. Bayonet; 25. Inner groove; 3. Cavity; 31. Guide plate; 32. Connecting pipe; 33. First bracket; 34. Piston plate; 4. Screw; 41. Second bracket; 42. Limiting rod; 43. Pressing plate; 5. Second fixed block; 51. Magnetic block; 52. Magnetic strip; 6. Spring column; 61. Fixing pad; 7. Second elastic member; 71. Counterweight; 8. Filter; 9. Turning handle. DETAILED DESCRIPTION

[0029] 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.

[0030] Specific examples are given below.

[0031] like Figure 1-8As shown, a hardness testing device for CNC tool production includes a testing machine body 1; a testing head 11 is installed in the middle of the testing machine body 1; a first fixed frame 12 is fixedly connected to the middle of the testing machine body 1; a rack 13 is slidably connected to the inner wall of the first fixed frame 12; two sets of support members 14 are fixedly connected to the outer wall of the rack 13; a tooth block 15 is rotatably connected to the middle of the support member 14, and the tooth block 15 and the rack 13 are mutually meshed; a tray 16 is fixedly connected to the top of the rack 13, and the tray 16 is arranged at the bottom of the testing head 11; a fixing bar 17 is slidably connected to the middle of the tray 16; a second fixing member 14 is fixedly connected to the side wall of the rack 13 The second fixed frame 18 is rotatably connected to two groups of rotating wheels 19 in the middle; the end of the fixed strip 17 is fixedly connected to a connecting cloth strip 110, and the connecting cloth strip 110 is arranged through the middle of the two groups of rotating wheels 19; the other end of the connecting cloth strip 110 is fixedly connected to the middle of the detection machine body 1; when working, the staff needs to install the detection machine body 1 in the working area, and then place the material to be detected on the inner wall of the tray 16, and the staff can rotate the end of the tooth block 15 when adjusting the height of the material tray 16, so that the tooth block 15 meshing with the tooth block 15 is engaged with the tooth block 15. The rail 13 can move upward and synchronously drive the tray 16 to move. Because one end of the connecting cloth strip 110 is fixedly connected to the detection machine body 1, and under the action of the second fixing frame 18 and the rotating wheel 19, the fixed connecting cloth strip 110 can straighten the middle of the fixing strip 17, and the fixing strip 17 of the soft material will slide in the middle of the tray 16, and its side wall will gradually approach and wrap the material placed in the middle of the tray 16 until it contacts and continues to stretch the fixing strip 17, so as to clamp and fix the irregular-shaped material, and then start the switch of the detection head 11, so that the detection head 11 moves downward and squeezes and fixes The middle of the material after being put on the tray 16 is fixed, thereby completing the hardness test of the material and presenting it on the display device in the middle of the detection machine body 1. After the test is completed, the tooth block 15 can be rotated in the opposite direction, so that the connecting cloth strip 110 loses the tension and the fixing strip 17 can be loosened from the material, and the material can be taken out. This step cooperates with the setting of the fixing strip 17 to reduce the problem that the material placed in the middle of the tray 16 is irregular in shape, making it difficult for the original flat fixing strip 17 to clamp and fix the material, thereby improving the accuracy of subsequent material testing. At the same time, the tray 16 can loosen the fixing work on the material during the descending process, thereby reducing the time for installing and disassembling the material.

[0032] like Figure 2 and 4As shown, the middle part of the tooth block 15 is slidably connected with a slide bar 2; the middle part of the slide bar 2 is fixedly connected with a top plate 21, and the top plate 21 is arranged on the inner wall of the tooth block 15; the middle part of the top plate 21 is fixedly connected with a first elastic member 22, and the other end of the first elastic member 22 is fixedly connected to the inner wall of the tooth block 15; the end of the first elastic member 22 is fixedly connected with a first fixed block 23, and the first fixed block 23 is arranged in a polygonal shape; the end of the first fixed block 23 is fixedly connected with two groups of bayonet pins 24; the outer wall of the first fixed frame 12 is provided with a plurality of groups of inner grooves 25 in a circumferential array, and the inner grooves 25 and the bayonet pins 24 are arranged in matching shapes; when working, by providing a slidable slide bar 2 in the middle part of the tooth block 15, when the tooth block 15 needs to be rotated, the slide bar 2 can be pushed inward first, so that after the slide bar 2 is subjected to force, the two groups of bayonet pins 24 will move outward and disengage between the inner walls of the inner grooves 25, and then the tooth block 15 can be rotated. The block 15 and the slide bar 2 are fixed together until the tray 16 moves to the specified position. The staff can then release the slide bar 2, cooperate with the reverse pulling force generated by the elongated first elastic member 22, and again insert the two sets of latches 24 into the specified inner wall area of ​​the inner groove 25. At the same time, during the movement, the first fixed block 23 can slide on the inner wall of the tooth block 15. Under the action of the latches 24 and the inner groove 25, this step can reduce the need for the staff to continuously use tools to fix the end of the tooth block 15 to support the tray 16 when testing the hardness of the material, reduce the troublesome problems during the testing process, and improve the flexibility of the tooth block 15 when it is used. Under the action of the polygonal first fixed block 23, the stability of the slide bar 2 as a whole when it moves on the inner wall of the tooth block 15 can be improved, and the shaking problem of the slide bar 2 when working on the inner wall of the tooth block 15 can be reduced.

[0033] like Figure 3 , 5As shown in Figure 6, the outer wall of the first fixed frame 12 is fixedly connected with a cavity 3; the top of the cavity 3 is fixedly connected with a guide plate 31, and the middle part of the guide plate 31 is horn-shaped; the bottom of the guide plate 31 is fixedly connected with a connecting pipe 32, and the output end of the connecting pipe 32 is located inside the first fixed frame 12; the bottom of the second fixed frame 18 is fixedly connected with a first bracket 33; the bottom of the first bracket 33 is fixedly connected with a piston plate 34; during operation, by providing the cavity 3 on the outer wall of the first fixed frame 12, when the rack 13 and the tray 16 move from top to bottom to reset, the first bracket 33 and the piston plate 34 provided at the bottom of the second fixed frame 18 will gradually approach and with the help of the inner wall of the cavity 3, and after the piston plate 34 continues to slide, the piston plate 34 can move the inner wall of the cavity 3 The gas is squeezed out and discharged from the output end of the connecting pipe 32, and the generated wind force can blow the dust impurities accumulated on the inner wall area of ​​the first fixing frame 12 to the outside, and this step is repeated. Under the action of the gas discharged from the end of the connecting pipe 32, this step can improve the cleanliness of the inner wall of the first fixing frame 12, reduce the accumulation of some metal impurities in the inner wall area of ​​the first fixing frame 12, and make the problem of wear on the bottom of the subsequent rack 13 after it is completely reset, improve the stability of the rack 13 when it is reset and placed, and reduce the resistance of the rack 13 when it slides on the inner wall of the first fixing frame 12. Under the action of the trumpet-shaped guide plate 31, the stability of the piston plate 34 and the inside of the cavity 3 when they are matching can be improved.

[0034] like Figure 2 , 3 As shown in Figure 7, the side wall of the tray 16 is rotatably connected with a screw rod 4; the middle part of the screw rod 4 is threadedly connected with a second bracket 41; the end of the second bracket 41 is fixedly connected with two groups of limit rods 42, and the limit rods 42 are slidably arranged on the top of the tray 16; the end of the limit rod 42 is fixedly connected with a pressure plate 43; during operation, by setting a cavity 3 on the outer wall of the tray 16, when it is necessary to adjust the material placement position, the staff can rotate the screw rod 4, whisper the second bracket 41 threadedly connected with the screw 4 and under the action of the two groups of limit rods 42, it can move horizontally, and the middle part of the limit rod 42 can gradually move away from and then approach the inner wall position of the tray 16, so that when the fixing bar 17 tightens the material, the side wall of the material can deeply contact with the pressure plate 43. In this step, under the action of the pressure plate 43, the position of the placed material can be changed, reducing the problem that the shape of the material is small, so that after its position is fixed, it is difficult for the output end of the detection head 11 to contact the material, thereby improving the accuracy of hardness detection.

[0035] like Figure 6As shown, two groups of second fixing blocks 5 are fixedly connected to the inner wall of the tray 16; a magnetic block 51 is fixedly connected to the end of the second fixing block 5; two groups of magnetic strips 52 are fixedly connected to the outer wall of the fixing bar 17, and the magnetic strips 52 and the magnetic block 51 are arranged to attract each other; during operation, two groups of second fixing blocks 5 are arranged on the inner wall of the tray 16, and the second fixing blocks 5 can support the position of the magnetic block 51, and when the fixing bar 17 is used and needs to be subsequently unfolded and reset, the edge of the fixing bar 17 can be swung and unfolded, so that the magnetic strip 52 arranged in the middle of the fixing bar 17 can generate an adsorption force after approaching the magnetic block 51, thereby fixing and unfolding the fixing bar 17. Under the action of the magnetic block 51, this step can reduce the difficulty of fixing the middle position of the fixing bar 17 made of soft material after long-term use, resulting in the phenomenon that when the material is placed in the middle of the tray 16 later, the placement position of the fixing bar 17 needs to be continuously changed.

[0036] like Figure 8 As shown, the inner wall of the pressure plate 43 is fixedly connected with multiple groups of spring columns 6; the output end of the spring column 6 is fixedly connected with a fixed pad 61; during operation, by arranging multiple groups of spring columns 6 in the middle of the limiting rod 42, when the limiting rod 42 comes into contact with the material, the edge of the material then squeezes multiple groups of fixed pads 61 in sequence, and after continued squeezing, the output end of the spring column 6 can retract inward, and cooperate with the elastic force generated by the spring column 6 to make the fixed pad 61 deeply contact with the gap at the edge of the material. Under the action of the fixed pad 61, this step can further improve the stability of the material when it is clamped and fixed, reduce the difficulty of filling the gap area at the edge of the material, and make the vibration frequency of the detection machine body 1 larger and loosen.

[0037] like Figure 5 As shown, multiple groups of second elastic members 7 are fixedly connected to the top of the piston plate 34; a counterweight body 71 is fixedly connected to the top of the second elastic member 7, and the multiple groups of counterweight bodies 71 are spherical. During operation, multiple groups of second elastic members 7 are arranged on the top of the piston plate 34. When the piston plate 34 sinks into the inner wall of the cavity 3 and slides, under the action of the extrusion force, the middle part of the piston plate 34 made of soft material will be deformed, and the multiple groups of second elastic members 7 and the counterweight body 71 can be mobilized to shake, so that the counterweight body 71 hits the first bracket 33 and the inner wall area of ​​the cavity 3 during the shaking process. This step, in conjunction with the counterweight body 71, can improve the cleanliness of the first bracket 33 and the middle part of the cavity 3, reduce the accumulation and adhesion of some dust, and cause the subsequent problem of greater wear on the middle part of the piston plate 34. The second elastic member 7 can increase the frequency of shaking of the counterweight body 71.

[0038] like Figure 5As shown, a plurality of groups of filter screens 8 are fixedly connected to the inner wall of the output end of the connecting pipe 32; during operation, by setting the filter screen 8 at the output end of the connecting pipe 32, when the piston plate 34 moves upward, the external gas will enter the connecting pipe 32 and the inner wall of the cavity 3, and the filter screen 8 can block the external dust. This step cooperates with the setting of the filter screen 8 to improve the stability of the subsequent staff when cleaning the connecting pipe 32, and reduce the problem of more impurities blocking the output end of the connecting pipe 32, thereby reducing the blowing area.

[0039] like Figure 4 As shown, the end of the slide bar 2 is rotatably connected to a handle 9, and the middle part of the handle 9 is recessed. During operation, a rotatable handle 9 is provided at the end of the slide bar 2, and before the worker holds the slide bar 2, his hand can first contact the middle part of the handle 9. Under the action of the handle 9, this step can improve the comfort of holding the slide bar 2 and reduce the problem of hand slipping.

[0040] Working principle: by installing the detection machine body 1 in the working area, and then placing the material to be detected on the inner wall of the tray 16, a slidable rack 13 is set in the middle of the first fixed frame 12, and the staff can rotate the end of the tooth block 15 when adjusting the height of the material tray 16, so that the rack 13 meshing with the tooth block 15 can move upward, and synchronously drive the tray 16 to move, because one end of the connecting cloth strip 110 is fixedly connected to the detection machine body 1, and under the action of the second fixed frame 18 and the rotating wheel 19, the fixed connecting cloth strip 110 can straighten the middle part of the fixing strip 17, and the fixing strip 17 of the soft material will slide in the middle of the tray 16, and its side wall will gradually approach and wrap. Wrap the material placed in the middle of the tray 16 until it contacts and continues to stretch the fixing strip 17, so as to clamp and fix the irregularly shaped material, and then start the switch of the detection head 11, so that the detection head 11 moves downward and squeezes the middle of the fixed material, so as to complete the hardness test of the material and present it on the display device in the middle of the detection machine body 1, and after the test is completed, the tooth block 15 can be rotated in the opposite direction, so that the connecting cloth strip 110 loses the tension and the fixing strip 17 can be loosened from the material, and the material can be taken out, by providing a slidable slide bar 2 in the middle of the tooth block 15, and when it is necessary to rotate the tooth block 15, the slide bar 2 can be pushed inward first, so that after the slide bar 2 is subjected to force, the two sets of latches 24 will move outward and be released between the inner walls of the inner groove 25 The gear block 15 and the slide bar 2 can then be rotated until the tray 16 moves to the specified position, and the staff can loosen the slide bar 2, cooperate with the reverse pulling force generated by the elongation of the first elastic member 22, and again insert the two sets of latches 24 into the specified inner wall area of ​​the inner groove 25. At the same time, during the movement, the first fixed block 23 can slide on the inner wall of the gear block 15. The cavity 3 is provided on the outer wall of the first fixed frame 12. When the rack 13 and the tray 16 move from top to bottom to reset, the first bracket 33 and the piston plate 34 provided at the bottom of the second fixed frame 18 will gradually approach and rely on the inner wall of the cavity 3. After the piston plate 34 continues to slide, the piston plate 34 can squeeze out the gas on the inner wall of the cavity 3 and discharge it from the output end of the connecting pipe 32. , and the generated wind force can blow the dust impurities accumulated on the inner wall area of ​​the first fixing frame 12 to the outside, and repeat this process. By setting a cavity 3 on the outer wall of the tray 16, when the material placement position needs to be adjusted, the staff can rotate the screw 4, and the second bracket 41 threadedly connected to the screw 4 can move horizontally under the action of two sets of limit rods 42, and the middle part of the limit rod 42 can gradually move away from and then approach the inner wall position of the tray 16, so that when the fixing bar 17 tightens the material, the side wall of the material can deeply contact the pressing plate 43. By setting two sets of second fixing blocks 5 on the inner wall of the tray 16, and the second fixing blocks 5 can support the position of the magnetic block 51, and when the fixing bar 17 is used and needs to be subsequently unfolded and reset,The edge of the oscillating fixed strip 17 can be expanded, so that the magnetic strip 52 set in the middle of the fixed strip 17 can generate an adsorption force after approaching the magnetic block 51, thereby fixing and expanding the fixed strip 17. By setting multiple groups of spring columns 6 in the middle of the limiting rod 42, when the limiting rod 42 contacts with the material, the edge of the material then squeezes multiple groups of fixed pads 61 in sequence, and after continued squeezing, the output end of the spring column 6 can retract inward, and cooperate with the elastic force generated by the spring column 6, so that the fixed pad 61 is deeply in contact with the gap at the edge of the material. By setting multiple groups of second elastic members 7 on the top of the piston plate 34, the piston plate 34 is sunk into the inner wall of the cavity 3. When sliding, under the action of the extrusion force, the middle part of the piston plate 34 made of soft material will be deformed, and multiple groups of second elastic members 7 and the counterweight body 71 can be mobilized to shake, so that the counterweight body 71 hits the first bracket 33 and the inner wall area of ​​the cavity 3 during the shaking process. By providing a filter screen 8 at the output end of the connecting pipe 32, when the piston plate 34 moves upward, the external gas will enter the connecting pipe 32 and the inner wall of the cavity 3, and the filter screen 8 can block the external dust. By providing a rotatable handle 9 at the end of the slide rod 2, the staff can first contact the middle part of the handle 9 before holding the slide rod 2.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A hardness testing device for CNC tool production, comprising a testing machine body (1); a testing head (11) is installed in the middle of the testing machine body (1); and the characteristics are: A first fixing frame (12) is fixedly connected to the middle of the detection machine body (1); a rack (13) is slidably connected to the inner wall of the first fixing frame (12); two groups of support members (14) are fixedly connected to the outer wall of the rack (13); a tooth block (15) is rotatably connected to the middle of the support member (14), and the tooth block (15) and the rack (13) are meshed with each other; a tray (16) is fixedly connected to the top of the rack (13), and the tray (16) is located at the bottom of the detection head (11). The tray (16) is provided with a fixing strip (17) in sliding connection in the middle thereof; a second fixing frame (18) is fixedly connected to the side wall of the rack rail (13); two groups of rotating wheels (19) are rotatably connected in the middle of the second fixing frame (18); a connecting cloth strip (110) is fixedly connected to the end of the fixing strip (17), and the connecting cloth strip (110) is arranged to penetrate in the middle of the two groups of rotating wheels (19); the other end of the connecting cloth strip (110) is fixedly connected to the middle of the detection machine body (1).

2. A hardness testing device for CNC tool production as claimed in claim 1, characterized in that: The middle part of the tooth block (15) is slidably connected to a slide bar (2); the middle part of the slide bar (2) is fixedly connected to a top plate (21), and the top plate (21) is arranged on the inner wall of the tooth block (15); the middle part of the top plate (21) is fixedly connected to a first elastic member (22), and the other end of the first elastic member (22) is fixedly connected to the inner wall of the tooth block (15); the end of the first elastic member (22) is fixedly connected to a first fixing block (23), and the first fixing block (23) is arranged in a polygonal shape; the end of the first fixing block (23) is fixedly connected to two groups of bayonet pins (24); the outer wall of the first fixing frame (12) is provided with a plurality of groups of inner grooves (25) in a circumferential array, and the inner grooves (25) and the bayonet pins (24) are arranged in a shape matching each other.

3. A hardness testing device for CNC tool production as claimed in claim 1, characterized in that: The outer wall of the first fixing frame (12) is fixedly connected to a cavity (3); the top of the cavity (3) is fixedly connected to a guide plate (31), and the middle of the guide plate (31) is arranged in a trumpet shape; the bottom of the guide plate (31) is fixedly connected to a connecting pipe (32), and the output end of the connecting pipe (32) is arranged inside the first fixing frame (12); the bottom of the second fixing frame (18) is fixedly connected to a first bracket (33); the bottom of the first bracket (33) is fixedly connected to a piston plate (34).

4. A hardness testing device for CNC tool production as claimed in claim 1, characterized in that: The side wall of the tray (16) is rotatably connected to a screw rod (4); the middle part of the screw rod (4) is threadedly connected to a second bracket (41); the end of the second bracket (41) is fixedly connected to two groups of limit rods (42), and the limit rods (42) are slidably arranged on the top of the tray (16); the end of the limit rod (42) is fixedly connected to a pressure plate (43).

5. A hardness testing device for CNC tool production as claimed in claim 1, characterized in that: Two groups of second fixing blocks (5) are fixedly connected to the inner wall of the tray (16); a magnetic block (51) is fixedly connected to the end of the second fixing block (5); and two groups of magnetic strips (52) are fixedly connected to the outer wall of the fixing strip (17), and the magnetic strips (52) and the magnetic blocks (51) are arranged to attract each other.

6. A hardness testing device for CNC tool production as claimed in claim 4, characterized in that: The inner wall of the pressure plate (43) is fixedly connected to a plurality of groups of spring columns (6); the output end of the spring column (6) is fixedly connected to a fixing pad (61).

7. A hardness testing device for CNC tool production as claimed in claim 3, characterized in that: The top of the piston plate (34) is fixedly connected to a plurality of groups of second elastic members (7); the top of the second elastic member (7) is fixedly connected to a counterweight body (71), and the plurality of groups of counterweight bodies (71) are spherically arranged.

8. A hardness testing device for CNC tool production as claimed in claim 3, characterized in that: The inner wall of the output end of the connecting pipe (32) is fixedly connected with multiple groups of filter screens (8).

9. A hardness testing device for CNC tool production as claimed in claim 2, characterized in that: The end of the slide rod (2) is rotatably connected to a rotating handle (9), and the middle of the rotating handle (9) is concave.

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