Reliability test simulation device for machine tool chain tool magazine

Abstract

The present invention relates to the field of mechanical manufacturing technology, and discloses a reliability test simulation device for a chain tool magazine of a machine tool, comprising a test base plate and a rotating base, the rotating base being symmetrically fixedly connected to the top of the test base plate, the top of the rotating base being rotatably connected to a sprocket, the top of the sprocket being fixedly connected to a driving spindle, and a test chain being transmission-connected between the two sprockets. Through the change in the resistance value of the elastic electrosensitive element inside the second pressure sensor, the problem of whether the axis centers are in a straight line can be discovered in time, and this structure helps to prevent failures and production interruptions caused by the problem of whether the axis centers are in a straight line during operation of the equipment, and timely discovery and intervention can reduce downtime and maintenance costs caused by failures. Compared with traditional static detection methods, this dynamic detection method can better reflect the performance of the tool under actual working conditions, because the tool will experience actual conditions of resistance and vibration, so this structure more accurately predicts the performance of the tool and the tool holder in actual use.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing, in particular to a reliability test simulation device for a chain tool magazine of a machine tool. Background Art

[0002] The chain tool magazine is an advanced automatic tool changing device, which is widely used in automated processing equipment such as CNC machine tools and machining centers. Through the precise chain transmission system, it can arrange the tools on the chain in a specific order, and can quickly and accurately control the transmission of the chain to realize the selection and replacement of tools. This automatic tool changing device not only improves production efficiency and reduces manual operation errors, but also provides a stable and reliable tool management solution for the modern processing and manufacturing industry. In order to ensure that the chain tool magazine has excellent performance when leaving the factory, a series of rigorous and comprehensive performance tests are required. These tests include but are not limited to: tool arrangement test, chain transmission test, tool change speed test, positioning accuracy test and durability test, etc. Through these tests, it can be ensured that every chain tool magazine leaving the factory has stable and reliable performance to meet user needs.

[0003] However, with the continuous development of science and technology, the existing Shiyan simulation device of the chain tool magazine has gradually exposed some problems. The existing device still has deficiencies in the detection of the chain tool magazine. The existing equipment usually tests the anti-collision knife of the chain tool magazine and ignores the test of chain wear. During long-term use, the chain will wear out, and the tension of the chain will decrease, which will cause loosening. This not only affects the arrangement and positioning of the tools, but may also cause additional vibration and noise. At the same time, the transmission efficiency of the worn chain decreases, which will affect the normal operation of the tool magazine. In efficient production that requires rapid tool change, the reduction in transmission efficiency will lead to a reduction in the overall efficiency of the production line, and the most serious consequence of chain wear is safety accidents. If the chain is severely worn and not discovered and handled in time, the chain will break during the tool change process, causing harm to the operator or serious damage to the equipment.

[0004] Secondly, in the chain tool magazine, whether the axes between the tool holder and the tool are in a straight line is an important performance indicator, which directly affects the accuracy and service life of the tool. Axis asynchrony will cause the tool to get stuck in the tool holder. During the tool change process, if the tool cannot slide in or out of the tool holder smoothly, the tool change time will be extended, affecting production efficiency. In severe cases, the stuck tool will cause equipment shutdown and increase maintenance costs. In addition, axis asynchrony will also cause the tool to deflect when rotating at high speed, aggravating tool wear, which not only shortens the service life of the tool, increases the frequency and cost of tool replacement, but also affects the quality of the machined surface.

[0005] Therefore, a reliability test simulation device for machine tool chain tool magazine is proposed. Summary of the Invention

[0006] The object of the present invention is to provide a reliability test simulation device for a machine tool chain tool magazine to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a reliability test simulation device for a chain tool magazine of a machine tool, comprising a test base plate and a rotating base, the rotating base being symmetrically fixedly connected to the top of the test base plate, the top of the rotating base being rotatably connected to a sprocket, the top of the sprocket being fixedly connected to a driving spindle, a test chain being transmission-connected between the two sprockets, the surfaces of the test chains being fixedly connected to a fixed seat, knives for testing being placed inside the fixed seat, the top of the test base plate being fixedly connected to a central control shaft, the top end of the central control shaft being fixedly connected to an audible and visual alarm, a tensioning assembly for detecting whether the test chain is loose is provided above the test base plate, a concentric assembly for detecting whether the concentricity of the tool holder and the tool is the same is provided above the central control shaft, a rotating assembly for rotating the tool is provided below the central control shaft, and a fixing assembly for fixing the tool is provided above the central control shaft;

[0008] The tensioning assembly includes a tensioning shell, the tensioning shell is fixedly connected to the top of the test base plate, a tensioning spring is fixedly connected to the inner wall of the tensioning shell, and one end of the tensioning spring away from the inner wall of the tensioning shell is fixedly connected to a tensioning connecting rod;

[0009] The rotating assembly includes a first electrically-controlled telescopic rod, which is rotatably connected to the top of the central control shaft. The first electrically-controlled telescopic rod is divided into an input end and an output end. The top of the input end of the first electrically-controlled telescopic rod is fixedly connected to a driving sub-shaft, and the bottom of the output end of the first electrically-controlled telescopic rod is fixedly connected to a receiving shaft. The surface of the receiving shaft is provided with equidistantly arranged clamping grooves in a circular shape, and the surface of the receiving shaft is rotatably connected to a fixed disc.

[0010] Preferably, the tensioning assembly also includes a tensioning fixing rod, which is fixedly connected to the surface of the tensioning connecting rod, and the upper and lower ends of the tensioning fixing rod are fixedly connected to tensioning sliding plates, and the ends of the two tensioning sliding plates that are close to each other are fixedly connected to interference blocks, and the surfaces of the interference blocks are symmetrically fixedly connected to the tensioning sliding rods, and the surface of the tensioning shell is symmetrically provided with sliding grooves, and the tensioning sliding rods are all slidably connected to the inside of the sliding grooves, and the top of the tensioning shell and the surface of one side close to the central control shaft are fixedly connected to a first pressure sensor.

[0011] Preferably, the concentric assembly includes a concentric shell, which is rotatably connected to the surface of the central control shaft, a concentric rod is fixedly connected to the inside of the concentric shell, a concentric sphere is fixedly connected to one end of the concentric rod away from the concentric shell, and a second pressure sensor is fixedly connected to the surface of the central control shaft.

[0012] Preferably, the rotating assembly also includes a rotating connecting seat, which is symmetrically fixedly connected to the top of the fixed disc, and the two rotating connecting seats are slidably connected with a clamping protrusion inside, and the bottom of the clamping protrusion on the side away from the receiving shaft is fixedly connected with a clamping spring, and one end of the clamping spring away from the clamping protrusion is fixedly connected to the top of the fixed disc, and the top of the clamping protrusion on the side away from the receiving shaft is fixedly connected to the second electrically-controlled telescopic rod, and the top of the second electrically-controlled telescopic rod is slidably connected to the bottom of the first electrically-controlled telescopic rod.

[0013] Preferably, the fixing component includes a linear groove, which is symmetrically opened at the bottom of the fixed disc, and the linear groove is slidably connected to a limiting column inside. The bottom of the fixed disc is rotatably connected to a rotating circular plate, and the top of the rotating circular plate is fixedly connected to the bottom of the supporting shaft. The surface of the rotating circular plate is symmetrically opened with motion grooves, and the limiting columns are slidably connected to the inside of the motion groove, and the bottom of the motion groove is fixedly connected to a clamping hand.

[0014] Preferably, the central control shaft has a built-in control system, which electrically controls the extension and retraction of the second electrically controlled telescopic rod and the first electrically controlled telescopic rod. The control system is electrically connected to the first pressure sensor, the second pressure sensor, and the sound and light alarm, thereby causing the sound and light alarm to sound and sound through the control system.

[0015] Preferably, a visual module is fixedly connected to the surface of the input end of the first electrically controlled telescopic rod, and the visual module is electrically connected to the control system. The driving sub-shaft is driven and installed on the first external motor. The control system electrically controls the start and stop of the first external motor, thereby driving the driving sub-shaft to rotate through the rotation of the output shaft of the first external motor.

[0016] Preferably, the driving main shaft close to the side of the central control shaft is driven and installed on the second external motor, and the second external motor is electrically controlled to start and shut down by the control system, thereby driving the driving main shaft to rotate through the rotation of the output shaft of the second external motor.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The wear of the test chain can be understood in real time through the change in the resistance value of the elastic electrosensitive element inside the first pressure sensor, and the wear of the test chain can be discovered in time, which helps to avoid equipment failure and production interruption caused by excessive wear of the test chain. Timely discovery and intervention can reduce downtime and maintenance costs caused by failures. As the wear of the test chain increases, the tensioning spring will gradually stretch to compensate for the change in the spacing of the test chain. This structure can ensure that the first pressure sensor can accurately measure the pressure change caused by the wear of the test chain. When the pressure exceeds the preset threshold, the sound and light alarm will sound an alarm to remind the operator to take corresponding measures. This monitoring method helps to prevent potential failures and production accidents.

[0019] 2. By changing the resistance value of the elastic electrosensitive element inside the second pressure sensor, it is possible to promptly detect whether the axes are in a straight line. This structure helps prevent equipment failures and production interruptions due to the axes not being in a straight line during operation. Timely detection and intervention can reduce downtime and maintenance costs caused by failures. Compared with traditional static detection methods, this dynamic detection method can better reflect the performance of the tool under actual working conditions, because the tool will experience actual conditions of resistance and vibration, which is closer to the situation in the actual production process. Therefore, this structure more accurately predicts the performance of the tool and tool holder in actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the main structure of the present invention;

[0021] Figure 2 It is a front perspective schematic diagram of the main structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 A in the middle is an enlarged schematic diagram;

[0023] Figure 4 It is a partial three-dimensional schematic diagram of the main structure of the present invention;

[0024] Figure 5 It is a schematic sectional perspective view of the tensioning assembly of the present invention;

[0025] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of point B in the middle;

[0026] Figure 7 For the present invention Figure 5 The enlarged schematic diagram of point C in the middle;

[0027] Figure 8 It is a partial three-dimensional schematic diagram of the concentric assembly of the present invention;

[0028] Figure 9 It is a schematic perspective cutaway view of the rotating assembly of the present invention;

[0029] Figure 10 For the present invention Figure 9 The enlarged schematic diagram of point D in the middle;

[0030] Figure 11 It is a partially cutaway perspective schematic diagram of the fixing assembly of the present invention;

[0031] In the picture:

[0032] 11. Test base plate; 12. Rotating base; 13. Sprocket; 14. Driving spindle; 15. Test chain; 16. Fixed base; 17. Central control shaft; 18. Sound and light alarm;

[0033] The tensioning assembly includes: 21, tensioning housing; 22, tensioning spring; 23, tensioning connecting rod; 24, tensioning fixing rod; 25, tensioning sliding plate; 26, resistance block; 27, tensioning sliding rod; 28, sliding slot; 29, first pressure sensor;

[0034] The concentric assembly includes: 31, a concentric shell; 32, a concentric rod; 33, a concentric sphere; 34, a second pressure sensor;

[0035] The rotating assembly includes: 41, a first electrically controlled telescopic rod; 42, a driving countershaft; 43, a receiving shaft; 44, a clamping groove; 45, a fixed disc; 46, a rotating connecting seat; 47, a clamping protrusion; 48, a clamping spring; 49, a second electrically controlled telescopic rod;

[0036] The fixing assembly includes: 51, linear slot; 52, limiting column; 53, rotating circular plate; 54, moving slot; 55, clamping hand. DETAILED DESCRIPTION

[0037] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] Embodiments of the present invention

[0039] See also Figures 1 to 11, a reliability test simulation device for a machine tool chain tool magazine includes a test base plate 11 and a rotating base 12. The rotating base 12 is symmetrically fixedly connected to the top of the test base plate 11. The top of the rotating base 12 is rotatably connected to a sprocket 13. The top of the sprocket 13 is fixedly connected to a driving spindle 14. The driving spindle 14 near the central control shaft 17 is driven and installed on the second external motor. The second external motor is electrically controlled to start and stop by the control system, and plays a role in driving the driving spindle 14 to rotate through the rotation of the output shaft of the second external motor. A test chain 15 is transmission-connected between the two sprockets 13. The surface of the test chain 15 is fixedly connected to a fixed seat 16. A knife for testing is placed inside the fixed seat 16. The top of the test base plate 11 is fixed A central control shaft 17 is connected, and a control system is built in the central control shaft 17. The control system electrically controls the extension and retraction of the second electrically controlled telescopic rod 49 and the first electrically controlled telescopic rod 41. The control system is electrically connected to the first pressure sensor 29, the second pressure sensor 34, and the sound and light alarm 18, and plays a role in causing the sound and light alarm 18 to sound and light alarm through the control system. The top of the central control shaft 17 is fixedly connected with the sound and light alarm 18, and a tensioning component for detecting whether the test chain 15 is loose is provided above the test base plate 11. A concentric component for detecting whether the concentricity of the tool holder and the tool is the same is provided above the central control shaft 17. A rotating component for rotating the knife is provided below the central control shaft 17, and a fixed component for fixing the knife is provided above the central control shaft 17;

[0040] The tensioning assembly includes a tensioning housing 21, which is fixedly connected to the top of the test base plate 11. A tensioning spring 22 is fixedly connected to the inner wall of the tensioning housing 21, and a tensioning connecting rod 23 is fixedly connected to the end of the tensioning spring 22 away from the inner wall of the tensioning housing 21.

[0041] The rotating assembly includes a first electrically-controlled telescopic rod 41, which is rotatably connected to the top of the central control shaft 17. The surface of the input end of the first electrically-controlled telescopic rod 41 is fixedly connected to a visual module, which is electrically connected to the control system. The driving sub-shaft 42 is driven and installed on the first external motor. The control system electrically controls the start and stop of the first external motor, and drives the driving sub-shaft 42 to rotate by rotating the output shaft of the first external motor. The first electrically-controlled telescopic rod 41 is divided into an input end and an output end. The top of the input end of the first electrically-controlled telescopic rod 41 is fixedly connected to the driving sub-shaft 42, and the bottom of the output end of the first electrically-controlled telescopic rod 41 is fixedly connected to a receiving shaft 43. The surface of the receiving shaft 43 is provided with clamping grooves 44 arranged in a ring and equidistantly, and the surface of the receiving shaft 43 is rotatably connected to a fixed disc 45.

[0042] The tensioning assembly also includes a tensioning fixed rod 24, which is fixedly connected to the surface of the tensioning connecting rod 23. The upper and lower ends of the tensioning fixed rod 24 are fixedly connected to tensioning sliding plates 25. The ends of the two tensioning sliding plates 25 that are close to each other are fixedly connected to resistance blocks 26. The surfaces of the resistance blocks 26 are symmetrically fixedly connected to tensioning sliding rods 27. The surface of the tensioning shell 21 is symmetrically provided with sliding grooves 28. The tensioning sliding rods 27 are all slidably connected to the inside of the sliding grooves 28. The top of the tensioning shell 21 and the surface of one side close to the central control shaft 17 are fixedly connected to a first pressure sensor 29.

[0043] The concentric assembly includes a concentric shell 31, which is rotatably connected to the surface of the central control shaft 17. A concentric rod 32 is fixedly connected to the inside of the concentric shell 31. The end of the concentric rod 32 away from the concentric shell 31 is fixedly connected to a concentric sphere 33. A second pressure sensor 34 is fixedly connected to the surface of the central control shaft 17.

[0044] The rotating assembly also includes a rotating connecting seat 46, which is symmetrically fixedly connected to the top of the fixed disc 45. The two rotating connecting seats 46 are slidably connected with a clamping protrusion 47 inside. The bottom of the clamping protrusion 47 on the side away from the receiving shaft 43 is fixedly connected to a clamping spring 48. One end of the clamping spring 48 away from the clamping protrusion 47 is fixedly connected to the top of the fixed disc 45. The top of the clamping protrusion 47 on the side away from the receiving shaft 43 is fixedly connected to a second electrically-controlled telescopic rod 49. The top of the second electrically-controlled telescopic rod 49 is slidably connected to the bottom of the first electrically-controlled telescopic rod 41.

[0045] The fixing component includes a linear groove 51, which is symmetrically opened at the bottom of the fixed disc 45. The linear groove 51 is slidably connected to the limiting column 52. The bottom of the fixed disc 45 is rotatably connected to a rotating circular plate 53. The top of the rotating circular plate 53 is fixedly connected to the bottom of the supporting shaft 43. The surface of the rotating circular plate 53 is symmetrically opened with a motion groove 54. The limiting column 52 is slidably connected to the inside of the motion groove 54. The bottom of the motion groove 54 is fixedly connected to a clamping hand 55.

[0046] The working principle of the present invention is as follows:

[0047] The following is the initial state: the second electrically-controlled telescopic rod 49 is in an extended state, the clamping spring 48 is in an unextended state, the clamping protrusion 47 is not engaged with the clamping groove 44, the clamping hand 55 is located on the side of the linear groove 51 and the motion groove 54 close to the center of the rotating circular plate 53 through the limit column 52, the concentric rod 32 is in contact with the bottom of the fixed disc 45 through the concentric sphere 33, the first electrically-controlled telescopic rod 41 is in a retracted state, the tensioning spring 22 is in a retracted state, the tensioning sliding rod 27 is located in the sliding groove 28 on the side away from the first pressure sensor 29, the tensioning sliding rod 27 does not conflict with the first pressure sensor 29, and the concentric rod 32 does not conflict with the second pressure sensor 34.

[0048] The following are the specific steps of the work:

[0049] Among them, the simulation test of the chain tension of the chain tool magazine is as follows:

[0050] The operator's manual controller system electrically controls the start-up of the second external motor, and the rotation of the output shaft of the second external motor will drive the drive main shaft 14 close to the central control shaft 17 to rotate, and then the drive main shaft 14 drives the test chain 15 engaged with it through the sprocket 13, and the test chain 15 will drive the drive main shaft 14 away from the central control shaft 17 to rotate synchronously. At this time, the test chain 15 is continuously transmitted under the rotation of the drive main shaft 14.

[0051] When the test chain 15 starts to transmit, it has no wear and the links in the test chain 15 fit tightly together, so the tensioning spring 22 contacts the test chain 15 through the contact block 26, the tensioning sliding plate 25, the tensioning fixing rod 24, and the tensioning connecting rod 23 and is in a compressed state.

[0052] However, after the test chain 15 has been running for a period of time, the pin inside the test chain 15 will be worn due to the long-term conflict with the sleeve during the long-term operation, and the outer diameter of the pin will become thinner due to wear. In this way, the gap between the pins will become thinner. Further, due to the increase in the spacing between the pins, the overall length of the test chain 15 will also increase. At this time, the test chain 15 can no longer fit tightly with the two drive spindles 14.

[0053] Due to the wear between the pins, the pins become thinner, and further the spacing between the pins becomes larger. The length of the test chain 15 will become longer due to the larger spacing between the pins. Since the test chain 15 cannot fit tightly with the drive spindle 14, the test chain 15 is in a relaxed state at this time. Although it can continue to transmit with the drive spindle 14, it will not only generate noise and additional vibration during the transmission process, but also "collision" will occur. Since the length of the test chain 15 becomes longer and relaxed, the tensioning spring 22 will gradually be in an extended state through the tensioning connecting rod 23 and the resistance block 26, and then the tensioning connecting rod 23, the tensioning fixing rod 24, the tensioning sliding plate 25, and the resistance block 26 will gradually slide toward the direction close to the first pressure sensor 29. At this time, the resistance block 26 drives the tensioning sliding rod 27 to gradually slide toward the direction of the first pressure sensor 29, but the tensioning sliding rod 27 does not conflict with the first pressure sensor 29.

[0054] As the test chain 15 becomes larger due to the spacing between the pins, the test chain 15 is prone to the hidden danger of chain breakage during driving. At this time, as the tensioning spring 22 continues to stretch, the contact block 26 will drive the tensioning sliding rod 27 to contact the first pressure sensor 29, and the tensioning sliding rod 27 will generate an extrusion force on the first pressure sensor 29, and then the elastic electrosensitive element inside the first pressure sensor 29 will be deformed by the external force, and its resistance value will change. When the resistance value of the elastic electrosensitive element inside the first pressure sensor 29 changes to the threshold value, the first pressure sensor 29 will send an electrical signal to the control system, which means that the test chain 15 can no longer be used and there is a risk of chain breakage. After receiving the electrical signal, the control system will electrically control the sound and light alarm 18 to sound and light alarm to prompt the operator. The operator can know the end of the test and the alarm of test failure through the change of the resistance value of the elastic electrosensitive element inside the first pressure sensor 29 in real time, and the wear of the test chain 15 can be discovered in time, which helps to avoid equipment failure and production interruption caused by excessive wear of the test chain 15, and timely discovery and intervention can reduce the downtime and maintenance costs caused by failure. As the wear of the test chain 15 increases, the tensioning spring 22 will gradually stretch to compensate for the change in the spacing of the test chain 15, and this structure can ensure that the first pressure sensor 29 can accurately measure the pressure change caused by the wear of the test chain 15. When the pressure exceeds the preset threshold, the sound and light alarm 18 will sound an alarm to remind the operator to take corresponding measures. This monitoring method helps to prevent potential failures and production accidents.

[0055] Among them, the concentricity detection of the tool holder and the tool:

[0056] At this time, during the transmission of the test chain 15, when the fixed seat 16 moves to the bottom of the visual module, the visual module sends an electrical signal to the control system through the visual image it captures, and the control system electrically controls the second external motor to turn off. At this time, the fixed seat 16 is located directly below the visual module.

[0057] Then the control system electrically controls the first external motor to start, and the output shaft of the first external motor will drive the driving sub-shaft 42 to rotate, and the output end of the driving sub-shaft 42 will drive the receiving shaft 43 to rotate. At this time, the rotation of the receiving shaft 43 drives the rotating circular plate 53 to rotate, and the limiting column 52 inside the moving groove 54 will have a tendency to rotate with it. However, in the process of the limiting column 52 contacting the moving groove 54 and the inner wall of the linear groove 51, the fixed disc 45 does not move, and then the limiting column 52 will only move linearly away from the center of the fixed disc 45 under the restriction of the linear groove 51. The movement of the limiting column 52 will drive the clamping hand 55 to move synchronously. When the limiting column 52 moves to the maximum process, the control system electrically controls the second external motor to turn off.

[0058] At the same time, the control system electrically controls the first electrically controlled telescopic rod 41 to extend. As the first electrically controlled telescopic rod 41 extends, the output end of the first electrically controlled telescopic rod 41 drives the receiving shaft 43, the fixed disc 45, the limiting column 52, and the rotating circular plate 53 to move synchronously, and then the clamping hand 55 at the bottom of the limiting column 52 also moves synchronously, and then the clamping hand 55 gradually approaches the fixed seat 16. When the clamping hand 55 is parallel to the surface of the knife, the control system electrically controls the first electrically controlled telescopic rod 41 to stop extending, and electrically controls the first external motor to start, and causes the output shaft of the first external motor to rotate in the opposite direction, and the output shaft of the first external motor drives the drive sub-shaft 42 to rotate. , and the output end of the driving countershaft 42 will drive the receiving shaft 43 to rotate. At this time, the rotation of the receiving shaft 43 drives the rotating circular plate 53 to rotate, and the limiting column 52 inside the moving groove 54 will tend to rotate with it. However, in the process of the limiting column 52 contacting the moving groove 54 and the inner wall of the linear groove 51, the fixed disc 45 does not move, and then the limiting column 52 will only move linearly close to the center of the fixed disc 45 under the restriction of the linear groove 51. The movement of the limiting column 52 will drive the clamping hands 55 to move synchronously. When the limiting column 52 moves to the maximum process, the two clamping hands 55 have been in contact with the surface of the knife and firmly clamp the knife.

[0059] At this time, the control system electrically controls the first external motor to stop rotating, and electrically controls the second electrically controlled telescopic rod 49 to retract. The retraction of the second electrically controlled telescopic rod 49 will cause the clamping protrusion 47 to rotate toward the top, and then the clamping spring 48 is no longer subjected to external force through the clamping protrusion 47, and the clamping spring 48 is in an extended state, and the clamping spring 48 drives the clamping protrusion 47 to move upward, but because the clamping protrusion 47 is restricted by the rotating connecting seat 46 and can only rotate, the clamping protrusion 47 rotates clockwise on the rotating connecting seat 46, and the end of the clamping protrusion 47 close to the receiving shaft 43 will be clamped in the clamping groove 44 due to the rotation.

[0060] Then the control system electrically controls the first external motor to start, and the output shaft of the first external motor drives the first electrically controlled telescopic rod 41 to rotate through the driving secondary shaft 42, and the first electrically controlled telescopic rod 41 drives the receiving shaft 43 to rotate. At this time, because the engaging protrusion 47 is engaged with the engaging groove 44, when the receiving shaft 43 rotates, the fixed disc 45 will also rotate synchronously with the receiving shaft 43, and the receiving shaft 43 will also drive the rotating circular plate 53 to rotate. Further, when the receiving shaft 43 rotates, the rotating circular plate 53 and the fixed disc 45 rotate synchronously with the receiving shaft 43. Further, the limiting column 52 will also rotate synchronously under the restriction of the moving groove 54 and the linear groove 51, and the limiting column 52 drives the knife to rotate synchronously in the tool holder through the clamping hand 55.

[0061] When the concentricity of the knife and the knife holder is adapted, the surface of the knife rubs evenly with the inside of the knife holder. At this time, the concentric spheres 33 located below the fixed disk 45 will generate interactive friction due to the rotation of the fixed disk 45, and because the axes of the knife and the knife holder are on the same line, when the knife rotates in the knife holder, its friction is constant. At this time, the friction force exerted on the concentric spheres 33 is also a constant value, and the concentric spheres 33 will only vibrate slightly due to friction, and then the concentric rod 32 will not conflict with the second pressure sensor 34 due to the small vibration amplitude. After a period of time, if the concentric rod 32 still does not conflict with the second pressure sensor 34, it means that the concentricity of the knife and the knife holder is indeed adapted, and then the control system electrically controls the sound and light alarm The alarm device 18 generates a qualified sound and light alarm. Through the change in the resistance value of the elastic electrosensitive element inside the second pressure sensor 34, it can be discovered in time whether the axes are in a straight line. This structure helps to prevent the equipment from being in a straight line during operation, thereby avoiding failures and production interruptions. Timely discovery and intervention can reduce downtime and maintenance costs caused by failures. Compared with traditional static detection methods, this dynamic detection method can better reflect the performance of the tool in actual working conditions, because the tool will experience actual conditions of resistance and vibration, which is closer to the situation in the actual production process. Therefore, this structure more accurately predicts the performance of the tool and tool holder in actual use.

[0062] However, when the axes of the knife and the knife holder are not in a straight line, when the knife rotates, the knife will collide eccentrically because its axis deviates from the center of the knife shaft, and then one side of the knife will excessively contact the inner wall of the knife holder in the knife holder, and the other side will not be able to contact the inner wall of the knife holder. Further friction and vibration will increase. At this time, the friction and vibration forces acting on the surface of the knife will be synchronously transmitted to the clamping hand 55, causing the fixed disk 45 to vibrate synchronously. Due to the vibration of the fixed disk 45, the concentric spheres 33 will also vibrate synchronously, and then the concentric spheres 33 will drive the concentric rods 32 to vibrate synchronously. At the same time, the concentric rods 32 will contact the second pressure sensor 34 under the action of vibration and apply a propulsion force to the second pressure sensor 34, so that the elastic electrosensitive element inside the second pressure sensor 34 is squeezed and elastically deformed. Further, the resistance value of the elastic electrosensitive element will change. At this time, the second pressure sensor 34 sends an electrical signal to the control system, and the control system will electrically control the sound and light alarm 18 to issue an unqualified sound and light alarm.

[0063] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0064] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A reliability test simulation device for a chain tool magazine of a machine tool, comprising a test base plate (11) and a rotating base (12), wherein the rotating base (12) is symmetrically fixedly connected to the top of the test base plate (11), the top of the rotating base (12) is rotatably connected to a sprocket (13), the top of the sprocket (13) is fixedly connected to a driving spindle (14), a test chain (15) is transmission-connected between the two sprockets (13), the surface of the test chain (15) is fixedly connected to a fixed seat (16), a knife for testing is placed inside the fixed seat (16), the top of the test base plate (11) is fixedly connected to a central control shaft (17), and the top of the central control shaft (17) is fixedly connected to an audible and visual alarm (18), characterized in that: A tensioning assembly for detecting whether the test chain (15) is loose is provided above the test base plate (11), a concentric assembly for detecting whether the concentricity of the tool holder and the tool is the same is provided above the central control shaft (17), a rotating assembly for rotating the tool is provided below the central control shaft (17), and a fixing assembly for fixing the tool is provided above the central control shaft (17); The tensioning assembly comprises a tensioning shell (21), the tensioning shell (21) is fixedly connected to the top of the test base plate (11), a tensioning spring (22) is fixedly connected to the inner wall of the tensioning shell (21), and one end of the tensioning spring (22) away from the inner wall of the tensioning shell (21) is fixedly connected to a tensioning connecting rod (23); The rotating assembly includes a first electrically controlled telescopic rod (41), the first electrically controlled telescopic rod (41) is rotatably connected to the top of the central control shaft (17), the first electrically controlled telescopic rod (41) is divided into an input end and an output end, the top of the input end of the first electrically controlled telescopic rod (41) is fixedly connected to a driving sub-shaft (42), the bottom of the output end of the first electrically controlled telescopic rod (41) is fixedly connected to a receiving shaft (43), the surface of the receiving shaft (43) is provided with equidistantly arranged snap-in grooves (44) in a circular shape, and the surface of the receiving shaft (43) is rotatably connected to a fixed disc (45); The tensioning assembly also includes a tensioning fixed rod (24), the tensioning fixed rod (24) is fixedly connected to the surface of the tensioning connecting rod (23), the upper and lower ends of the tensioning fixed rod (24) are fixedly connected to tensioning sliding plates (25), the ends of the two tensioning sliding plates (25) that are close to each other are fixedly connected to a resistance block (26), the surfaces of the resistance blocks (26) are symmetrically fixedly connected to tensioning sliding rods (27), the surface of the tensioning housing (21) is symmetrically provided with sliding grooves (28), the tensioning sliding rods (27) are all slidably connected to the inside of the sliding grooves (28), and the top of the tensioning housing (21) and the surface of one side close to the central control shaft (17) are fixedly connected to a first pressure sensor (29); The concentric assembly includes a concentric shell (31), the concentric shell (31) is rotatably connected to the surface of the central control shaft (17), a concentric rod (32) is fixedly connected inside the concentric shell (31), an end of the concentric rod (32) away from the concentric shell (31) is fixedly connected to a concentric sphere (33), and a second pressure sensor (34) is fixedly connected to the surface of the central control shaft (17).

2. The reliability test simulation device for a machine tool chain tool magazine according to claim 1, characterized in that: The rotating assembly also includes a rotating connecting seat (46), which is symmetrically fixedly connected to the top of the fixed disc (45), and the two rotating connecting seats (46) are slidably connected to the inside of each of the two rotating connecting seats (46). The bottom of the side of the clamping protrusion (47) away from the receiving shaft (43) is fixedly connected to a clamping spring (48), and one end of the clamping spring (48) away from the clamping protrusion (47) is fixedly connected to the top of the fixed disc (45). The top of the side of the clamping protrusion (47) away from the receiving shaft (43) is fixedly connected to a second electrically controlled telescopic rod (49), and the top of the second electrically controlled telescopic rod (49) is slidably connected to the bottom of the first electrically controlled telescopic rod (41).

3. The reliability test simulation device for a machine tool chain tool magazine according to claim 1, characterized in that: The fixing assembly includes a linear groove (51), the linear groove (51) is symmetrically opened at the bottom of the fixed disc (45), the linear groove (51) is slidably connected to the limiting column (52), the bottom of the fixed disc (45) is rotatably connected to a rotating circular plate (53), the top of the rotating circular plate (53) is fixedly connected to the bottom of the receiving shaft (43), the surface of the rotating circular plate (53) is symmetrically opened with a motion groove (54), the limiting column (52) is slidably connected to the inside of the motion groove (54), and the bottom of the motion groove (54) is fixedly connected to a clamping hand (55).

4. The reliability test simulation device for a machine tool chain tool magazine according to claim 1, characterized in that: The central control shaft (17) has a built-in control system, and the control system electrically controls the extension and retraction of the second electrically controlled telescopic rod (49) and the first electrically controlled telescopic rod (41). The control system is electrically connected to the first pressure sensor (29), the second pressure sensor (34), and the sound and light alarm (18).

5. The reliability test simulation device for a machine tool chain tool magazine according to claim 2, characterized in that: A visual module is fixedly connected to the surface of the input end of the first electrically controlled telescopic rod (41), the visual module is electrically connected to the control system, the driving sub-shaft (42) is drivingly connected to the first external motor, and the control system electrically controls the start and stop of the first external motor.

6. The reliability test simulation device for a machine tool chain tool magazine according to claim 1, characterized in that: The driving main shaft (14) close to one side of the central control shaft (17) is drivingly connected to a second external motor, and the second external motor is electrically controlled to start and stop by a control system.

Images