TWM633566U - Intelligent tool holder - Google Patents

Abstract

An intelligent tool holder, the connecting part of the tool holder body is provided with a plurality of embedded holes, and a sensing element is embedded in each of the embedded holes, and the sense of stress and strain generated under the load of the machining tool is sensed by mechanics. The sensing reading device is designed as a casing, which covers the connecting portion, and is provided with a sensing reading module for reading the sensing data of the aforementioned sensing elements. The intelligent tool holder improves the sensing characteristics and reduces the coupling effect through the active rotation angle sensing method, and can detect the global force in the processing process.

Description

Wisdom handle

This invention relates to a smart knife handle, and in particular to a smart knife handle with several sensors installed inside the knife handle body.

In the manufacturing process, knives play an extremely important role. The number of knives is huge and the application is complex, making the use and management of knives an important factor in reducing production costs and shortening production time. The development trend of modern factories is towards automatic and intelligent production methods. Therefore, real-time monitoring of processing status and real-time tool information can improve the utilization rate of machinery and equipment and the competitiveness of products.

As far as the current technology is concerned, it may be a way to design the sensing mechanism on the machine tool spindle or workbench, so as to monitor the tool processing status with real-time dynamic force sensing signals. The sensing used is a strain gauge sensor. Specific parameters are fed back to the cutting control method. A sensor is installed between the table and the workpiece to detect the cutting force, and a sensor is installed on the fixture to detect the rotating cutting force.

The current technology has the following disadvantages: the installation form is pasted on the surface of the knife handle, and there is more concern about falling off; the sensing mechanism needs to attach multiple strain gauges for sensing; the assembly and integration are complicated, and it needs to be pasted in different directions and positions; decoupling design It is complex and requires a large number of algorithms for analysis; the accuracy is low, and the sensing in each axis is likely to interfere with each other; the overall cost is high, and about 10 to 12 strain gauge sensors need to be attached.

The purpose of this creation is to provide a smart knife handle. Several measurements of the sensing mechanism are installed inside the connection part of the knife handle body. Through the active rotation angle sensing method, the sensing characteristics are improved to reduce the coupling effect, and it can detect Measuring the overall force of the processing process.

Another purpose of this creation is to provide a smart knife handle, which installs several measurements of the sensing mechanism inside the connection part of the knife handle body, integrates the sensing data through simple assembly, and has high accuracy and low overall cost.

In order to achieve the above purpose, the invention provides a smart knife handle, which includes a knife handle body, the knife handle body includes a connecting part, the connecting part is used to connect a processing tool, and the connecting part is provided with a plurality of embedded holes, and the Each of these embedded holes is embedded with a sensing element, which uses mechanics to sense the sensing data of the stress and strain generated by the handle body under the load of the corresponding processing tool; and a sensing and reading device, the sensing The reading device is designed as a casing, which covers the connecting part, and a sensing reading module is arranged in the space between the connecting part and the outer casing, and the sensing reading module is connected to each sensing element , for reading the sensing data of the aforementioned sensing elements.

As a preferred manner, the sensing elements are piezoelectric sensors.

As a preferred manner, the sensing elements are used for layered sensing of the bending moment load and torque load of the processing tool, and each of the sensing elements configured with two symmetrical embedded positions for each bending moment and torque sensing measuring components.

As a preferred manner, the sensing and reading device includes a microcontroller for signal processing the sensing data read by the sensing and reading module. The sensing and reading device includes a wireless transmission module, which is connected to the micro-controller, and is used for encrypting and sending the signal processed by the micro-controller to an external monitoring device.

As a preferred manner, the sensing and reading device includes a power supply module for providing power to the electronic modules in the sensing and reading device. The power module includes a battery, and the battery is a primary battery, a rechargeable battery or a wireless rechargeable battery.

As a preferred manner, the sensing and reading device is detachably fixed on the connecting portion.

This creative smart knife handle has a multi-axis decoupling and high-sensitivity sensing mechanism, adopts a layered sensing method for bending moment load and torque load, and cooperates with piezoelectric active force sensing of piezoelectric elements to improve sensing characteristics and reduce coupling effect. Also through the symmetrical placement of piezoelectric elements, it is possible to detect the overall force situation during the processing.

Compared with the previous technology, the smart knife handle of this creation has the following characteristics. In terms of installation form, the sensing element is embedded in the knife handle, and the installation method is more stable and reliable; the sensing mechanism only needs to use a single independent piezoelectric element to sense , so the assembly and integration are simple and suitable for different styles of knife handles; it is also relatively easy in decoupling design, and the design can be directed to the direction of force; the sensing element is embedded in the knife handle to make the accuracy high, and the sensing of each axis will not Mutual interference; its overall cost is also lower than the prior art, because piezoelectric elements are low cost and less required.

Embodiments of the present invention will be described in detail below, and the accompanying drawings are used as examples. In addition to these detailed descriptions, this creation can also be widely implemented in other embodiments, and any easy replacement, modification, and equivalent changes of any of the described embodiments are included in the scope of this creation, and the scope of the patent application is allow. In the description of the manual, many specific details are provided in order to enable readers to have a more complete understanding of the invention; however, the invention may still be implemented under the premise of omitting some or all of the specific details. Also, well-known steps or elements have not been described in detail in order to avoid unnecessarily limiting the invention. The same or similar elements in the drawings will be denoted by the same or similar symbols. It should be noted that the drawings are for illustrative purposes only, and do not represent the actual size or quantity of components, and some details may not be fully drawn in order to simplify the drawings.

Please refer to Figure 1 and Figure 2, which are schematic diagrams of the decomposition and assembly of the smart knife handle in this case. The smart knife handle 100 of this embodiment includes a knife handle body 200 , a plurality of sensing elements 300 , a processing tool 400 and a sensing and reading device 500 .

The tool holder body 200 includes a spindle assembly part 210 , a clamping part 220 and a connecting part 230 , wherein the processing tool 400 is connected to the end of the connecting part 230 . The spindle assembly part 210 is used for connecting the spindle of a processing machine, such as a milling machine, a drilling machine, a lathe or a sawing machine. The clamping part 220 is connected with the spindle assembly part 210, and the clamping part 220 is used for clamping or changing tools in the tool magazine; the clamping part 220 is connected with the connecting part 230, and the connecting part 230 is connected to the processing Tool 400 , the processing tool 400 is, for example, a milling cutter, a drill, a turning tool, a saw blade, and the like.

In terms of implementation, the connecting portion 230 is provided with a plurality of embedded holes 231, and each of the embedded holes 231 is embedded with a sensing element 300, which uses mechanics to sense when the tool handle body 200 is subjected to the corresponding processing tool. 400 sensing data of stress and strain generated under a load; in practice, the sensing elements 300 are piezoelectric sensors. The sensing elements 300 are used for layered sensing of the bending moment load and torque load of the machining tool 400, and each of the sensing elements with two symmetrical embedded positions is configured for each bending moment and torque sensing 300.

In terms of implementation and application, this case uses mechanical analysis to find out the position where the tool holder body 200 can generate the maximum stress and strain under the load of the corresponding tool tip 400 . As a result, it can be seen that the stress of the bending moment load will be the largest near the main shaft assembly part 210. In order to decouple the force signal output of these sensing elements 300, this project analyzes the sensing of bending moment load and torque load. Layer design, and adopt symmetrical design, for each bending moment (Mx, My) and torque (Tz) respectively configure these sensing elements 300 with two symmetrical embedded positions, to improve the impact on the processing tool 400 tool tip Force sensing accuracy. And it can also be known through mechanical analysis that when the bending moment of Mx or My is applied at the tip of the tool, although the sensing element 300 of the bending moment can output its corresponding voltage signal, the sensing element 300 of the torque will also Affected by it, a part of the voltage signal is output. Therefore, in order to further obtain a better decoupling effect in practice, the positions of the embedded holes of the sensing elements 300 in the upper and lower groups are staggered from each other, for example, by 45 degrees, which can be used to improve the force coupling effect.

The sensing and reading device 500 is designed as a shell, and the sensing and reading device 500 is covered on the connecting portion 230 (as shown in FIG. 2 ), and the connecting portion 230 and the external casing of the sensing and reading device 500 A sensing and reading module 510 is provided in the space of the sensing element 300, and the sensing and reading module 510 is connected to each of the sensing elements 300 to read the sensing data (voltage signal) of the aforementioned sensing elements 300.

Please refer to Figure 3, which is the circuit block diagram of the smart knife handle in this case. In practical application, the sensing data (voltage signal) of these sensing elements 300 can pass through the sensing reading module 510 to pass the signal through a reading circuit composed of a charge amplifier and a filter element, and use an analog-to-digital converter ( not shown in the figure), the converted digital signal is processed through a microcontroller (MCU) 520, and then through a wireless transmission module 530, the signal processed by the microcontroller 520 is encrypted and sent to an external The monitoring device 600 performs real-time dynamic monitoring of processing (as shown in FIG. 4 ), and the sensing data can be transmitted to the analysis module of the monitoring device 600 through the wireless transmission module 530, and then compared by the analysis module The sensing data and the characteristic data of the tool handle in the database are used to calculate the state of wear, damage, and service life of the processing tool 400 of the smart knife handle 100 .

In practical applications, the sensing and reading device 500 includes a power supply module 540, and the power supply module uses 540 to provide power to the electronic modules in the sensing and reading device 500 (such as the aforementioned sensing and reading module 510, microcontroller (MCU) 520, wireless transmission module 530). The power module 540 includes a battery, and the battery is a disposable battery, a rechargeable battery or a wireless rechargeable battery. Taking the rechargeable battery as an example, when the smart knife handle 100 is not working, the smart knife handle 100 can be charged without replacing the power module 540 . Or the wireless rechargeable battery as an example, in the workshop of the smart knife handle 100 , the smart knife handle 100 can be charged part of the time without replacing the power module 540 .

In terms of implementation and application, the casing design of the sensing and reading device 500 can be installed from the direction of the processing tool 400 to the connecting portion 230, and the aforementioned electronic components of the smart knife handle 100 (except the sensing element 300) will be arranged in a spatial layout. , built into the space between the connection part 230 and the outer shell, wherein the electronic components include a sensing and reading module 510, a microcontroller (MCU) 520, a wireless transmission module 530, a power supply module 540 (battery, step-down IC). In the layout application, the weight will be used as a reference, evenly distributed on the same plane and fixed on the inner wall of the casing of the sensing and reading device 500 to form an approximate weight balance and complete the dynamic balance design.

In practice, the sensing and reading device 500 is detachably fixed on the connecting portion 230 . The fixing of the sensing and reading device 500 includes covering and fixing of circuit elements, and the connection part 230 can be fixedly locked with threads or fixing parts (not shown in the figure), so as to fix the sensing and reading device 500 and The stability between the knife handle body 200 forms a closed space where only internal components exist, and the electronic components are formed and fixed inside by filling glue. The sensing system in the smart knife handle 100 is modularized, and the sensing and reading device 500 is detachable, which improves the convenience of use of the smart knife handle 100 as a whole, enables subsequent replacement of components and fault detection mechanisms, and reduces subsequent Maintenance costs.

In actual processing, the smart knife handle of this creation has a multi-axis decoupling and high-sensitivity sensing mechanism. It adopts a layered sensing method for bending moment load and torque load, and cooperates with piezoelectric active force sensing of piezoelectric elements. Improve sensing characteristics and reduce coupling effects. Also through the symmetrical placement of piezoelectric elements, it is possible to detect the overall force situation during the processing. The data sensed by the sensing elements 300 include, for example, vibration signals for the tool handle body 200 during processing, stress signals for the tool handle body 200 during processing, torque signals for the tool handle body 200 during processing, and the like. The monitoring device 600 receives the sensing data transmitted by the wireless transmission module 530, and the analysis module in the monitoring device 600 compares whether the various sensing information of the tool handle body 200 during processing is normal according to the handle characteristic data in the database. , and various sensing data are combined to analyze the current state of wear, damage, and life of the machining tool 400 of the tool holder body 200 .

The embodiments disclosed above are only illustrative of the principles, characteristics and effects of this creation, and are not intended to limit the scope of implementation of this creation. Anyone who is familiar with this technology can do so without violating the spirit and scope of this creation. Modifications and changes are made to the above-mentioned embodiments. Any equivalent changes and modifications accomplished by utilizing the content disclosed in this creation shall still be covered by the scope of the following patent application.

100: Wisdom Knife Handle

200: Knife handle body

210: Spindle assembly part

220: clamping part

230: connection part

231: Embedded hole

300: sensing element

400: Processing tools

500: sensing and reading device

510:Sensing reading module

520: Microcontroller (MCU)

530: Wireless transmission module

540: Power module

600: Monitoring device

[Figure 1] is a schematic diagram of the decomposition of the smart knife handle in this case. [Figure 2] is a schematic diagram of the combination of the smart knife handle in this case. [Figure 3] is the circuit block diagram of the smart knife handle in this case. [Figure 4] is a schematic diagram of an application example of the smart knife handle in this case.

100: Wisdom Knife Handle

200: Knife handle body

210: Spindle assembly part

220: clamping part

230: connection part

231: Embedded hole

300: sensing element

400: Processing tools

500: sensing and reading device

Claims (8)

A smart knife handle, including: A knife handle body, which includes a connecting part, the connecting part is used to connect a processing tool, and the connecting part is provided with a plurality of embedded holes, and a sensing element is embedded in each of the embedded holes, and the mechanical Sensing data of stress and strain generated by the tool holder body under the corresponding load of the processing tool; and A sensing and reading device, the sensing and reading device is designed as a casing, which covers the connecting part, and a sensing and reading module is arranged in the space between the connecting part and the outer casing, the sensing and reading The fetching module is connected to each of the sensing elements for reading the sensing data of the aforementioned sensing elements. The smart knife handle according to claim 1, wherein the sensing elements are piezoelectric sensors. The smart knife handle according to claim 1, wherein the sensing elements are used for layered sensing of the bending moment load and torque load of the processing tool, and two are configured for each bending moment and torque sensing The sensing elements are symmetrically embedded. The smart knife handle as described in Claim 1, wherein the sensing and reading device includes a microcontroller for performing signal processing on the sensing data read by the sensing and reading module. The smart knife handle as described in claim 4, wherein the sensing and reading device includes a wireless transmission module connected to the microcontroller to encrypt and send the signal processed by the microcontroller A monitoring device to the outside world. The smart knife handle according to claim 1, wherein the sensing and reading device includes a power supply module, and the power supply module is used to provide power to the electronic modules in the sensing and reading device. The smart knife handle according to claim 6, wherein the power module includes a battery, and the battery is a disposable battery, a rechargeable battery or a wireless rechargeable battery. The smart knife handle according to claim 1, wherein the sensing and reading device is detachably fixed on the connecting portion.

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