TWI833177B - Intelligent tool holder - Google Patents

Abstract

A 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

Smart knife handle

The present invention relates to a smart knife handle, and in particular, to a smart knife handle with a plurality of sensors installed inside the knife handle body.

In the manufacturing process, cutting tools play an extremely important role. The large number of cutting tools and their complex applications make the use and management of cutting tools 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, being able to monitor the processing status and obtain real-time information on cutting tools can improve the utilization rate of machinery and equipment and the competitiveness of products.

As far as the current technology is concerned, it is possible to design the sensing mechanism on the machine tool spindle or workbench to monitor the tool processing status with real-time dynamic force sensing signals. The sensing used is a strain gauge sensor. Through monitoring Specific parameters are used to feed back the cutting control method. A sensor is set between the workbench and the workpiece to detect the cutting force, and a sensor is set on the fixture to detect the rotational cutting force.

The current technology has the following shortcomings: the installation method is pasted on the surface of the tool handle, which is more likely to fall off; the sensing mechanism requires multiple strain gauges to be attached for sensing; the assembly and integration are complex and require different directions and positions for pasting; decoupled design It is complex and requires a large number of algorithms for analysis; the accuracy is low, and the sensing in each axis is easy to interfere with each other; the overall cost is high, and about 10 to 12 strain gauge sensors need to be attached.

The object of the present invention is to provide a smart knife handle, which installs several measurements of the sensing mechanism inside the connection part of the knife handle body, and improves the sensing characteristics through an active rotation angle sensing method. Reduce coupling effects and detect the full range of stress during the machining process.

Another object of the present invention 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, has high accuracy and low overall cost.

In order to achieve the above object, the present invention provides a smart tool handle, which includes a tool handle body. The tool handle body includes a connecting part for connecting a processing tool, and the connecting part is provided with a plurality of embedded holes, and the connecting part is provided with a plurality of embedded holes. There is a sensing element embedded in each of the embedded holes, which uses mechanics to sense the sensing data of the stress and strain generated by the tool handle body under the corresponding load of the processing tool; and a sensing reading device, which senses The reading device is a shell design that covers the connecting part, and a sensing reading module is provided in the space between the connecting part and the outer shell. The sensing reading module is connected to each of the sensing elements. , used to read the sensing data of the aforementioned sensing elements.

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

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

As a preferred method, the sensing reading device includes a microcontroller for performing signal processing on the sensing data read by the sensing reading module. The sensing reading device includes a wireless transmission module. The wireless transmission module is connected to the microcontroller and is used to encrypt the signal processed by the microcontroller and send it to an external monitoring device.

Preferably, the sensing reading device includes a power module, and the power module is used to provide power to the electronic module in the sensing reading device. The power module includes a battery, which is a disposable battery, a rechargeable battery or a wireless rechargeable battery.

As a preferred mode, the sensing reading device is detachably fixed to the connection part.

The smart tool handle of the present invention has multi-axis decoupling and high-sensitivity sensing mechanism, and adopts bending moment negative It implements layered sensing of load and torque load, and cooperates with piezoelectric active force sensing of piezoelectric elements to improve sensing characteristics and reduce coupling effects. Through the symmetrical placement of piezoelectric elements, the full range of stress during the processing can be detected.

Compared with the previous technology, the smart knife handle of the present invention has the following characteristics. In terms of installation, 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 for sensing. , so the assembly and integration is simple and suitable for different styles of tool handles; it is also easier to decouple the design, and the design can be pointed in the direction of force; the sensing element is embedded in the tool handle to achieve high accuracy, and the sensing in each axis will not interfere with each other; its overall cost is also lower than the existing technology because the piezoelectric components are low-cost and require less quantity.

100:Smart knife handle

200: Knife handle body

210: Spindle assembly part

220: Clamping part

230:Connection part

231: Embedded hole

300: Sensing element

400: Machining tools

500: Sensing reading device

510: Sensing reading module

520: Microcontroller (MCU)

530: Wireless transmission module

540:Power module

600:Monitoring device

[Figure 1] is an exploded schematic diagram 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.

The embodiments of the present invention will be described in detail below, along with the drawings as illustrations. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments. Easy substitutions, modifications, and equivalent changes of any of the embodiments are included in the scope of the present invention, and are within the scope of the patent application. Accurate. In the description of the specification, many specific details are provided to enable the reader to have a more complete understanding of the present invention; however, the present invention may still be implemented with some or all of the specific details omitted. In addition, well-known steps or elements are not described in detail to avoid unnecessary limitations on the present invention. The same or similar elements in the drawings will be represented by the same or similar symbols. Please note that the drawings are for illustration only and do not represent the actual size or quantity of components. Some details May not be fully drawn for simplicity of illustration.

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

The tool handle 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 to connect 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 to the spindle assembly part 210, and the clamping part 220 is used for tool magazine clamping or tool change; the clamping part 220 is connected to the connecting part 230, and the connecting part 230 is connected to the machining center. Tool 400, the processing tool 400 is, for example, a milling cutter, a drill bit, a turning tool, a saw blade, etc.

In practical applications, 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 exposed to the corresponding processing tool. Sensing data of stress and strain generated under a load of 400°C; in practical applications, 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 processing tool 400 , and the sensing elements are configured with two symmetrical embedded positions for each bending moment and torque sensing. 300.

In terms of implementation, this case uses mechanical analysis to find the position where the tool handle body 200 can generate the maximum stress and strain under the load of the corresponding tool tip of the processing tool 400. As a result, it can be seen that the stress of the maximum bending moment load will be near the spindle assembly part 210. In order to decouple the force signal output of the sensing elements 300, this case is divided into sensing of bending moment load and torque load. A layered design is adopted, and a symmetrical design is adopted to configure the sensing elements 300 at two symmetrical embedded positions for each bending moment (Mx, My) and torque (Tz) to improve the sensitivity of the tool tip 400 of the processing tool. Force sensing accuracy. And through mechanical analysis, it can also be known that when Mx or My bending moment is applied to the tool tip, although the sensing element 300 of the bending moment can output its corresponding voltage signal, for the torque The sensing element 300 will also be affected by it and output a partial voltage signal. Therefore, in order to obtain a better decoupling effect in implementation, the positions of the embedded holes of the upper and lower groups of sensing elements 300 are staggered from each other, for example, 45 degrees, which can be used to improve the force coupling effect.

The sensing reading device 500 is designed as a housing. The sensing reading device 500 is covered with the connecting portion 230 (as shown in FIG. 2 ), and the connecting portion 230 and the sensing reading device 500 are externally cased. A sensing reading module 510 is disposed in the space. The sensing reading module 510 is connected to each of the sensing elements 300 to read the sensing data (voltage signals) 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 implementation, the sensing data (voltage signals) of the sensing elements 300 can be passed through the sensing reading module 510 through a reading circuit composed of a charge amplifier and a filter element, and an analog-to-digital converter ( (not shown in the figure), the converted digital signal is processed through a microcontroller (MCU) 520, and then the signal processed by the microcontroller 520 is encrypted and sent to an external device through a wireless transmission module 530. The monitoring device 600 performs real-time dynamic monitoring of processing (as shown in Figure 4). The wireless transmission module 530 can transmit the sensing data to the analysis module of the monitoring device 600, and then compare it through the analysis module. The sensing data and the tool holder characteristic data in the database are used to calculate the wear, damage, life and other conditions of the processing tool 400 of the smart tool holder 100 .

In implementation, the sensing reading device 500 includes a power module 540. The power module 540 is used to provide power to electronic modules in the sensing reading device 500 (such as the aforementioned sensing reading module). 510, microcontroller (MCU) 520, wireless transmission module 530). The power module 540 includes a battery, which 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 take a wireless rechargeable battery as an example. In the workshop of the smart knife handle 100, part of the time can be used to charge the smart knife handle 100 without replacing the power module 540.

In practical applications, the housing design of the sensing reading device 500 can be used by the processing tool 400 direction is installed to the connecting part 230. In terms of spatial layout, the aforementioned electronic components (except the sensing element 300) of the smart knife handle 100 will be built in the space between the connecting part 230 and the outer casing. The electronic components It includes a sensing reading module 510, a microcontroller (MCU) 520, a wireless transmission module 530, and a power supply module 540 (battery, buck IC). In the layout application, the weight will be used as a benchmark, evenly distributed on the same plane and fixed on the inner wall of the housing of the sensing and reading device 500, forming a rough weight balance and completing the dynamic balance design.

In practical applications, the sensing and reading device 500 is detachably fixed to the connecting portion 230 . The fixation of the sensing and reading device 500 includes covering and fixing the circuit components, and the connecting portion 230 can be locked with screws or fasteners (not shown) to fix the sensing and reading device 500 and the connection part 230 . The stability of the knife handle body 200 forms a closed space in which only internal components exist, and the electronic components are formed and fixed inside by pouring glue. The sensing system in the smart knife handle 100 is modularized, and the sensing reading device 500 is detachable, which improves the overall convenience of use of the smart knife handle 100, enables subsequent component replacement and fault detection mechanisms, and can reduce subsequent costs. Repair costs.

In actual processing, the smart tool handle of the present invention has a multi-axis decoupling and high-sensitivity sensing mechanism, using a layered sensing method of bending moment load and torque load, and cooperates with the piezoelectric active force sensing of piezoelectric elements. Improve sensing characteristics and reduce coupling effects. Through the symmetrical placement of piezoelectric elements, the full range of force conditions during the processing can be detected. The sensing data of 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, and torque signals for the tool handle body 200 during processing. 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 the various sensing information of the current tool holder body 200 during processing according to the tool holder characteristic data in the database. , and various sensing data are integrated to analyze the current wear, damage, life and other conditions of the processing tool 400 of the tool handle body 200.

The above-disclosed embodiments are only illustrative to illustrate the principles, features and effects of the present invention. This is not intended to limit the scope of the invention. Anyone skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the invention. Any equivalent changes and modifications accomplished by applying the contents disclosed in the present invention shall still be covered by the following patent application scope.

100:Smart knife handle

200: Knife handle body

210: Spindle assembly part

220: Clamping part

230:Connection part

231: Embedded hole

300: Sensing element

400: Machining tools

500: Sensing reading device

Claims (6)

A smart tool handle includes: a tool handle body, which includes a connecting part used to connect a processing tool, and the connecting part is provided with a plurality of embedded holes in layers, and each of the embedded holes has an inner A sensing element is embedded, and these sensing elements are piezoelectric sensors. These sensing elements are used for layered sensing of the bending moment load and torque load of the processing tool, and a symmetrical design is adopted to detect each The bending moment and torque sensing are each configured with two symmetrical embedded positions of the sensing elements to improve the sensing accuracy of the force on the tool tip of the processing tool, and the upper and lower sets of embedded holes of the sensing elements are The positions are staggered from each other to improve the force coupling effect, and use mechanics to sense the sensing data of the stress and strain generated by the tool handle body under the corresponding load of the processing tool; and a sensing reading device, which reads The device is a shell design that covers the connecting part, and a sensing reading module is provided in the space between the connecting part and the outer shell. The sensing reading module is connected to each of the sensing elements. To read the sensing data of the aforementioned sensing elements. The smart knife handle according to claim 1, wherein the sensing reading device includes a microcontroller for signal processing the sensing data read by the sensing reading module. The smart knife handle according to claim 2, wherein the sensing reading device includes a wireless transmission module, which is connected to the microcontroller and is used to encrypt and send signals processed by the microcontroller. A monitoring device to the outside world. The smart knife handle of claim 1, wherein the sensing reading device includes a power module, and the power module is used to provide power to the electronic module in the sensing reading device. The smart knife handle of claim 4, 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 to the connection part.

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