Knife handle vibration monitoring device

Abstract

The invention discloses a cutter handle vibration monitoring device, and belongs to the technical field of signal monitoring, the cutter handle vibration monitoring device comprises a cover plate, a shell and a cushion block, the cover plate is coaxially mounted on the shell and forms an accommodating space, the cushion block is coaxially mounted in the accommodating space, at least one mounting plate is arranged in the circumferential direction of the cushion block, and a vibration monitoring module is mounted on the mounting plate. The cushion block is directly installed on the knife handle body in an interference fit mode, the number of units between the vibration source and the vibration sensor is effectively reduced, and the monitoring device has high sensitivity. Meanwhile, the monitoring device is simple in structure and small in size, the problem that vibration source signals are weakened due to the fact that the monitoring device is too large can be effectively solved, and the accuracy of the monitoring device is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of signal monitoring, and in particular to a tool handle vibration monitoring device. Background Art

[0002] During the milling process, unreasonable machining parameter settings, unstable clamping force, tool wear or non-compliant edge manufacturing often cause tool vibration, which affects the cutting force and transmits the chatter to the workpiece, leading to reduced product surface quality and low machining efficiency. Therefore, it is necessary to perform high-precision real-time detection of the tool during the machining process to ensure machining efficiency and quality.

[0003] In the prior art, there are two main types of devices for tool vibration monitoring: one is to attach the sensor to the surface of the workpiece, but the measurement data will fluctuate greatly with the continuous change of the processing position. If the distance from the vibration source is far, the accuracy of the data in representing the vibration state is also poor; the other is to integrate the sensor, power module, chip, etc. on the tool handle, but the existing monitoring device is often too large due to unreasonable installation methods or space allocation, and the vibration transmission chain from the vibration source to the sensor is too long, the sensor is less sensitive to tool vibration, and the measurement result has a large deviation. In addition, the monitoring device in the prior art needs to open a thread groove around the tool handle, the versatility of the device is poor, and it is difficult to ensure stability when the tool is running at high speed. Summary of the invention

[0004] The present invention aims to overcome the problem of low sensitivity of a tool handle vibration monitoring device in the prior art and provide a tool handle vibration monitoring device.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: a tool handle vibration monitoring device is provided, comprising a cover plate, an outer shell and a pad block, the cover plate is coaxially installed on the outer shell to form a accommodating space, the pad block is coaxially installed in the accommodating space, at least one mounting plate is circumferentially arranged on the pad block, and a vibration monitoring module is installed on the mounting plate.

[0006] In one embodiment, a charging module is installed on the mounting plate, and the vibration monitoring module is electrically connected to the charging module.

[0007] In one embodiment, a fourth through hole is provided in the center of the cushion block for mounting a tool handle.

[0008] In one embodiment, the shell includes a second flange, a second through hole and a third flange, the second flange is opened at the first end of the shell, the center of the second through hole is opened at the second end of the shell, and the third flange is arranged on the outer edge of the second through hole.

[0009] In one embodiment, a fourth flange is provided at the second end of the cushion block, and the third flange and the fourth flange are embedded in each other.

[0010] In one embodiment, the cover plate includes a first through hole, at least one mounting hole, at least one first groove, at least one first threaded hole and a first flange, the first through hole is centrally opened on the cover plate, at least one mounting hole and at least one first groove are radially opened on the outer edge of the first through hole, the grooves and the mounting holes are staggered, at least one first threaded hole is evenly opened around the first through hole, and the first flange is arranged on the outer edge of the cover plate.

[0011] In one embodiment, the first end of the cushion block is embedded in the first through hole, the first end of the mounting plate is embedded in the first groove, and the first flange and the second flange are embedded.

[0012] In one embodiment, the first threaded hole is aligned with a second threaded hole axially opened in the tool handle.

[0013] In summary, the present invention provides a tool handle vibration monitoring device, which effectively reduces the number of units between the vibration source and the vibration sensor by directly installing the pad on the tool handle body in an interference fit manner, so that the monitoring device has a higher sensitivity. At the same time, the monitoring device has a simple structure and a small size, which can effectively avoid the problem of the vibration source signal being weakened due to the monitoring device being too large, thereby ensuring the accuracy of the monitoring device.

[0014] In order to make the above features and advantages of the invention more obvious and easy to understand, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the assembly of the tool handle vibration monitoring device provided by the present invention.

[0016] Figure 2 for Figure 1 Exploded diagram.

[0017] Figure 3 A schematic diagram of a cover plate in the tool handle vibration monitoring device provided by the present invention.

[0018] Figure 4 A schematic diagram of a housing in the tool handle vibration monitoring device provided by the present invention.

[0019] Figure 5 A schematic diagram of a pad in the tool handle vibration monitoring device provided by the present invention.

[0020] Figure 6 It is the frequency domain amplitude spectrum of the vibration signal measured by using the existing technology.

[0021] Figure 7 It is a frequency domain amplitude spectrum diagram of the vibration signal measured by the tool handle vibration monitoring device of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Figure 1 The assembly diagram of the tool handle vibration monitoring device provided by the present invention is as follows: Figure 1 As shown, the monitoring device 1 is coaxially mounted on the outside of the tool handle 2, the monitoring device 1 is in direct contact with the tool handle 2, and the vibration signal on the tool handle 2 is directly transmitted to the monitoring device 1, shortening the length of the vibration transmission chain.

[0024] Figure 2 for Figure 1 An exploded diagram of Figure 2 As shown, the handle 2 comprises a handle body 21 and a boss structure 22, wherein the boss structure 22 is coaxially arranged on the handle body 21. A third plane 23 is arranged at one end of the boss structure 22, and at least one second threaded hole 24 is formed on the third plane 23.

[0025] The monitoring device 1 includes a cover plate 11, a housing 12 and a cushion block 13. The cover plate 11 is coaxially mounted on the housing 12 to form a receiving space (not shown in the figure), and the cushion block 13 is coaxially mounted in the receiving space.

[0026] like Figure 3As shown, the cover plate 11 includes a cover plate body 111, a first plane 112, a second plane 113, a first through hole 114, at least one mounting hole 115, at least one first groove 116, at least one first threaded hole 117 and a first flange 118, wherein the first plane 112 is located at a first end of the cover plate body 111, the second plane 113 is located at a second end of the cover plate body 111, the center of the first through hole 114 is opened on the cover plate body 111, and the center of the first through hole 114 passes through the cover plate body 111, The outer edge of the first through hole 114 is radially provided with at least one mounting hole 115 and at least one first groove 116. The mounting hole 115 passes through the cover body 111 and is connected to the first through hole 114. The first groove 116 is provided on the second plane 113. The first groove 116 and the mounting hole 115 are evenly staggered. At least one first threaded hole 117 is evenly provided around the first through hole 114. The first flange 118 is provided on the outer edge of the cover body 111. The cover body 111 is a cylinder. The cover 11 and the boss structure 22 of the handle 2 (see Figure 2 ) is axially connected to axially fix the monitoring device 1. The first through hole 114 is a circular hole for sleeve-fitting the cushion block 13. The mounting hole 115 is a square hole expanded outward from the first through hole 114, for accommodating the mounting plate on the cushion block 13. The first groove 116 is a square groove for mounting the power module. The first threaded hole 117 is a through hole, and the first threaded hole 117 and the second threaded hole 24 (see Figure 2 ) quantity and position match.

[0027] like Figure 4 As shown, the shell 12 includes a shell body 121, a fourth plane 122, a fifth plane 123, a second through hole 124, a third through hole 125, a second flange 126 and a third flange 127. The fourth plane 122 is located at the first end of the shell body 121, the fifth plane 123 is located at the second end of the shell body 121, the center of the second through hole 124 is opened on the shell body 121, the outer edge of the second through hole 124 is provided with a third flange 127, the third through hole 125 is provided on the fifth plane 123, and the second flange 126 is provided on the fourth plane 122. The shell body 121 is cylindrical, and the interior is a hollow structure for accommodating the cushion block 13 (see Figure 2) and circuit elements (not shown in the figure), which can protect the internal signal from external interference and prevent interference from dust, water or other impurities. The inner side wall and inner bottom of the shell body 121 are fixedly installed with the circuit element, and the circuit element is used to monitor other types of signals besides vibration. The circuit element can use industrial sealant, or other connection methods that can achieve fixation. The center of the second through hole 124 is opened on the fifth plane 123 to accommodate the cushion block 13, and the third flange 127 is embedded with the fourth flange on the cushion block 13. The third through hole 125 is a reserved charging port, and can also be used to fix the device during installation. The second flange 126 is arranged on the outer edge of the shell 12, and the second flange 126 is embedded with the first flange 118 and sealed by glue.

[0028] like Figure 5 As shown, the cushion block 13 includes a cushion block body 131, a sixth plane 132, a seventh plane 133, a fourth through hole 134, at least one mounting plate 135, at least one third threaded hole 136 and a fourth flange 137. The sixth plane 132 is located at the first end of the cushion block body 131, the seventh plane 133 is located at the second end of the cushion block body 131, the center of the fourth through hole 134 is opened on the cushion block body 131, at least one mounting plate 135 is arranged circumferentially on the cushion block body 131, at least one third threaded hole 136 is opened on the mounting plate 135, and the fourth flange 137 is arranged on the seventh plane 133. The cushion block body 131 is cylindrical, and the outer wall of the cushion block body 131 protrudes outward to form at least one square mounting plate 135, on which a vibration monitoring module (not shown in the figure) and a charging module (not shown in the figure) are installed and locked by screws. The vibration monitoring module and the charging module are electrically connected. The fourth through hole 134 is penetrated by the handle body 21 (see Figure 2 ), the fourth through hole 134 is interference fit with the handle body 21. The fourth flange 137 and the third flange 127 match in shape and size, and the fourth flange 137 and the third flange 127 are mutually embedded and sealed with glue.

[0029] Combination Figures 1 to 5It can be seen that before using the monitoring device 1, the cover plate 11 needs to be installed on the handle 2, and the handle body 21 is inserted into the first through hole 114, and there is a clearance fit between the handle body 21 and the first through hole 114. The first plane 112 of the cover plate 11 is in direct contact with the third plane 23 of the handle 2, and the first threaded hole 117 and the second threaded hole 24 are aligned and tightened with screws to achieve a fixed connection between the cover plate 11 and the handle 2. A power module with matching size is installed in any of the first grooves 116.

[0030] The shank body 21 is installed in the fourth through hole 134 of the cushion block 13, and the fourth through hole 134 and the shank body 21 are installed in an interference fit manner. This design eliminates the screw hole structure opened in the circumference of the shank body 21, and the screw hole structure is used in the prior art to install screws that fix the connection between the monitoring device and the shank. The elimination of the screw hole structure not only effectively avoids the situation where the screws become loose when the shank rotates at high speed and the monitoring device falls off, but also does not need to destroy the original structure of the shank, effectively ensuring the versatility of the device and the stability of the connection. The vibration monitoring module and the charging module are installed on the mounting plate 135 and are tightened and fixed by screws, thereby realizing the separation of the vibration monitoring module from other modules, optimizing the internal installation space, reducing the volume and additional weight of the monitoring device 1, preventing the phenomenon of severe attenuation of the vibration source signal due to excessive volume, and ensuring the accuracy of vibration data acquisition. The sixth plane 132 of the cushion block 13 passes through the first through hole 114 of the cover plate 11, and the sixth plane 132 directly contacts the first plane 112 of the cover plate 11. At the same time, the first end of the cushion block 13 is embedded in the first through hole 114, and the same end of the mounting plate 135, the vibration monitoring module and the charging module is embedded in the first groove 116.

[0031] The power module is installed on the inner side wall and the inner bottom of the shell body 121 and fixed with glue. The handle body 21 is passed through the second through hole 124 of the shell 12, and the second through hole 124 is coaxially installed with the first through hole 114 and the fourth through hole 134. The fourth plane 122 of the shell 12 is in direct contact with the second plane 113 of the cover plate 11, and the shell 12 and the cover plate 11 are connected after being engaged by the first flange 118 and the second flange 126, and are sealed; the fifth plane 123 of the shell 12 is in direct contact with the seventh plane 133 of the cushion block 13, and the shell 12 and the cushion block 13 are connected after being engaged by the third flange 127 and the fourth flange 137, and are also sealed. The sealing treatment can use glue, or other sealing methods can be used according to actual conditions to ensure the sealing and integrity of the monitoring device 1 and prevent the internal signal from being disturbed due to moisture.

[0032] After the monitoring device 1 is installed on the tool handle 2, one end of the tool handle 2 is installed on a spindle (not shown in the figure) of a machine tool (not shown in the figure), and the tool (not shown in the figure) is installed on the other end of the tool handle 2. The spindle will provide power to the tool handle to drive the tool to perform cutting action.

[0033] When the monitoring device 1 is in use, the shank 2 is the vibration source and the shank body 21 is in direct contact with the pad 13, and the vibration signal will be directly transmitted to the pad 13. The vibration sensor in the vibration monitoring module on the pad 13 receives the vibration signal and performs corresponding data preprocessing on the vibration signal through the built-in data processing algorithm of the vibration monitoring module; at the same time, the Bluetooth transmission unit in the vibration monitoring module transmits the vibration data to the host computer in real time for subsequent data processing and analysis. The sensing unit can use a MEMS vibration sensor. This design shortens the transmission chain length of the vibration signal at the vibration source to the vibration sensor unit, improves the real-time and accuracy of obtaining vibration data, and ensures the sensitivity of the monitoring device 1 to the vibration state.

[0034] Figure 6 The vibration signal frequency domain amplitude spectrum shown is obtained by monitoring using the existing technology, that is, the vibration signal is collected and obtained by attaching a sensor to the surface of the workpiece. Figure 7 The vibration signal frequency domain amplitude spectrum shown is detected by using the monitoring device 1 of the present invention. Figure 6 and Figure 7 It can be seen that the vibration frequency domain amplitude measured by the monitoring device 1 in the present invention is larger, the sensitivity to the vibration signal is higher, and the vibration state can be identified more accurately.

[0035] In summary, the present invention provides a tool handle vibration monitoring device, which effectively reduces the number of units between the vibration source and the vibration sensor by directly installing the pad 13 on the tool handle body 21 in an interference fit manner, so that the monitoring device 1 has a higher sensitivity. At the same time, the monitoring device 1 has a simple structure and a small size, which can effectively avoid the problem of the vibration source signal being weakened due to the monitoring device 1 being too large, thereby ensuring the accuracy of the monitoring device 1.

[0036] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims

1. A tool handle vibration monitoring device, characterized in that: It includes a cover plate, a shell and a cushion block. The cover plate is coaxially mounted on the shell to form a receiving space. The cushion block is coaxially mounted in the receiving space. At least one mounting plate is circumferentially arranged on the cushion block. A vibration monitoring module is mounted on the mounting plate.

2. The tool handle vibration monitoring device according to claim 1, characterized in that: A charging module is installed on the mounting plate, and the vibration monitoring module is electrically connected to the charging module.

3. The tool handle vibration monitoring device according to claim 1, characterized in that: A fourth through hole is provided in the center of the cushion block for mounting the tool handle.

4. The tool handle vibration monitoring device according to claim 3, characterized in that: The shell comprises a second flange, a second through hole and a third flange, the second flange is arranged at the first end of the shell, the center of the second through hole is arranged at the second end of the shell, and the third flange is arranged at the outer edge of the second through hole.

5. The tool handle vibration monitoring device according to claim 4, characterized in that: A fourth flange is arranged at the second end of the cushion block, and the third flange is embedded with the fourth flange.

6. The tool handle vibration monitoring device according to claim 5, characterized in that: The cover plate includes a first through hole, at least one mounting hole, at least one first groove, at least one first threaded hole and a first flange, the center of the first through hole is opened on the cover plate, the outer edge of the first through hole radially opens at least one mounting hole and at least one first groove, the grooves and the mounting holes are arranged alternately, at least one first threaded hole is evenly opened around the first through hole, and the first flange is arranged on the outer edge of the cover plate.

7. The tool handle vibration monitoring device according to claim 6, characterized in that: The first end of the cushion block is embedded in the first through hole, the first end of the mounting plate is embedded in the first groove, and the first flange is embedded with the second flange.

8. The tool handle vibration monitoring device according to claim 7, characterized in that: The first threaded hole is aligned with a second threaded hole axially opened in the tool handle.

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