A self-powered monitoring device and method for tool wear of a numerical control machine tool

Abstract

The application discloses a kind of self-generating monitoring device and method of numerical control machine tool tool wear, it is related to tool detection field, including clamping handle, tool, power generation component and transmission component, tool is installed in one end of clamping handle, power generation component is installed in the outside of clamping handle, transmission component is installed in the outside of clamping handle, transmission component is used to convert the electric signal generated by power generation component into radio frequency signal and send, whether the tool is worn is judged by detecting whether the radio frequency signal emitted by transmission component is delayed.The application uses the cooperation use mode of clamping handle, tool, power generation component and transmission component, when machining machine tool drives clamping handle and tool to process workpiece, by detecting whether signal is generated by power generation component and transmission component cooperation operation within predetermined time, whether tool is processed in place within predetermined time can be judged, whether tool is damaged is judged, so as to improve tool detection convenience.

Description

Technical Field

[0001] This invention relates to the field of tool inspection, and in particular to a self-generating monitoring device and method for tool wear of CNC machine tools. Background Technology

[0002] Machine tools are equipment used to cut, shape, and process metals or other materials. They typically consist of a machine tool, a drive mechanism, a tool holder, and cutting tools. With the rapid development of the modern machining industry, the performance and lifespan of cutting tools directly affect machining efficiency and product quality. Therefore, real-time monitoring of tool wear has become an important means to improve machining accuracy and reduce production costs.

[0003] Existing technologies typically monitor tool wear using non-contact sensors such as vibration and acoustic signals. However, these methods can be affected by interference in complex machining environments, leading to unreliable monitoring results, failure to detect tool wear in a timely manner, or even misjudgment of tool wear. This results in tools continuing to be used even when they are worn, increasing production costs and workpiece defect rates, thus presenting certain defects. Summary of the Invention

[0004] The purpose of this invention is to provide a self-generating monitoring device and method for CNC machine tool tool wear, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-generating monitoring device for CNC machine tool tool wear, comprising:

[0006] Clamping handle;

[0007] A cutting tool, which is mounted on one end of a clamping shank;

[0008] A power generation component, which is mounted on the outside of the clamping handle;

[0009] A transmission component is installed on the outside of the clamping shank. The transmission component is used to convert the electrical signal generated by the power generation component into a radio frequency signal and emit it. The wear of the tool is determined by detecting whether the radio frequency signal emitted by the transmission component is delayed.

[0010] Preferably, the power generation component includes:

[0011] A coil, which is fixedly mounted on the outside of the clamping handle, is electrically connected to the transmission assembly;

[0012] An integrated housing is rotatably mounted on the outside of the clamping handle;

[0013] A permanent magnet is fixedly installed inside the integrated housing and is sleeved on the outside of the coil.

[0014] Preferably, the integrated housing includes:

[0015] A fixing sleeve is fitted onto the outside of the clamping handle, and the permanent magnet is fixedly installed inside the fixing sleeve;

[0016] A limiting block is fixedly connected to the end of a fixed sleeve and is sleeved around the outside of the cutting tool.

[0017] Preferred options also include:

[0018] The bearing is installed between the clamping handle and the retaining sleeve;

[0019] A snap-fit ​​component is installed on the outside of the clamping handle, and the outer wall of the snap-fit ​​component is rotatably snapped into the fixed sleeve.

[0020] Preferably, the transmission component includes:

[0021] A circuit board, which is fixedly installed inside the clamping handle and is electrically connected to the coil;

[0022] A wireless transmitter is mounted on a circuit board, and the circuit board is provided with a rectifier circuit electrically connected to the wireless transmitter.

[0023] Another objective of this invention is to provide a method for using a self-generating monitoring device for CNC machine tool tool wear, comprising the following steps:

[0024] Step 1: Install the clamping shank on the machine tool, set the rotation speed of the clamping shank and the depth of tool feed, set the workpiece processing time threshold according to the speed of tool rotation and the depth of feed, and set the delay alarm threshold.

[0025] Step 2: The machine tool drives the clamping shank and cutting tool to operate on the workpiece and keeps a timer;

[0026] Step 3: When the tool reaches the workpiece processing time threshold, and the machine tool receives a valid signal, the tool is not worn, and the machine tool drives the clamping shank and tool to reset and continue operation;

[0027] Step 4: If the machine tool does not receive a signal within the delayed alarm threshold time, it is determined that the tool is worn and the tool is replaced.

[0028] Preferably, the step of receiving a valid signal by the machine tool in step three is as follows:

[0029] The bottom of the limiting block fits against the top of the workpiece. The workpiece brakes the fixed sleeve through the limiting block. The clamping handle rotates relative to the fixed sleeve, causing the clamping handle to drive the coil to rotate relative to the permanent magnet. The coil generates an alternating current that is transmitted to the circuit board. The alternating current is transmitted to the wireless transmitter through the rectifier circuit on the circuit board. The wireless transmitter emits a sine wave, and the machine tool continuously receives five cycles of the sine wave, which is then considered a valid signal.

[0030] Preferably, in step four, if no signal is received within five seconds after the tool has been operating to the workpiece machining time threshold, an alarm is issued and the tool is replaced.

[0031] The technical effects and advantages of this invention are as follows:

[0032] This invention utilizes the coordinated use of a clamping shank, a cutting tool, a power generation component, and a transmission component. When the machine tool drives the clamping shank and the cutting tool to process the workpiece, by detecting whether the power generation component and the transmission component generate a signal within a predetermined time, it can be determined whether the cutting tool has been processed within the predetermined time, thereby determining whether the cutting tool is damaged, thus improving the convenience of cutting tool detection. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 This is an exploded view of the clamping handle and the fixing sleeve of the present invention;

[0035] Figure 3 This is a schematic diagram of the exploded structure at the clamping handle of the present invention;

[0036] Figure 4 This is a schematic diagram of the internal structure of the front of the present invention.

[0037] In the diagram: 1. Clamping handle; 2. Cutting tool; 3. Power generation component; 31. Coil; 32. Integrated housing; 321. Fixing sleeve; 322. Limiting block; 33. Permanent magnet; 4. Transmission component; 41. Circuit board; 5. Bearing; 6. Connecting piece. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] This invention provides, for example Figure 1-4The device illustrates a self-generating power monitoring system for CNC machine tool tool wear, comprising a clamping shank 1, a tool 2, a power generation component 3, and a transmission component 4. The tool 2 is mounted on one end of the clamping shank 1, the power generation component 3 is mounted on the outside of the clamping shank 1, and the transmission component 4 is mounted on the outside of the clamping shank 1. The transmission component 4 converts the electrical signal generated by the power generation component 3 into a radio frequency signal for transmission. The wear of the tool 2 is determined by detecting whether there is a delay in the radio frequency signal transmitted by the transmission component 4. When the tool 2 is worn, the drilling speed of the tool 2 on the workpiece will decrease, and the machining depth of the tool 2 on the workpiece will decrease within a certain period of time. This causes the power generation component 3 to fail to generate power, and the transmission component 4 to fail to transmit a signal. Consequently, the signal processor of the machine tool on which the clamping shank 1 is mounted cannot receive the signal, thus determining that the tool 2 is worn. When the tool 2 is not worn, if the tool 2 processes to a specified depth within a specified time, the power generation component 3 will generate power, and the transmission component 4 will transmit a signal to the machine tool. The control terminal on the machine tool is equipped with a signal receiver to receive the signal transmitted by the transmission component 4 and to detect and judge the tool status.

[0040] Furthermore, the power generation component 3 includes a coil 31, an integrated housing 32, and a permanent magnet 33. The coil 31 is fixedly installed on the outside of the clamping handle 1 and is electrically connected to the transmission component 4. The integrated housing 32 is rotatably installed on the outside of the clamping handle 1, and the permanent magnet 33 is fixedly installed inside the integrated housing 32. The permanent magnet 33 is sleeved on the outside of the coil 31. When the integrated housing 32 and the clamping handle 1 are in a relative rotational state, the coil 31 rotates relative to the permanent magnet 33, thereby causing the coil 31 to cut the magnetic field and generate current, thus providing power to the transmission component 4.

[0041] Furthermore, the integrated housing 32 includes a fixed sleeve 321 and a limiting block 322. The fixed sleeve 321 is sleeved on the outside of the clamping handle 1, and the permanent magnet 33 is fixedly installed inside the fixed sleeve 321. The limiting block 322 is fixedly connected to the end of the fixed sleeve 321 and sleeved on the outside of the tool 2. That is, when the tool 2 processes to a specified depth, the bottom of the limiting block 322 is in contact with the workpiece, braking the fixed sleeve 321 and causing the coil 31 to rotate relative to the permanent magnet 33. When the speed of the coil 31 reaches 3000 rpm, the current generated by the coil 31 is greater than or equal to 100mW, thereby supporting the transmission component 4 to send electrical signals.

[0042] Specifically, it also includes a bearing 5 and a snap-fit ​​component 6. The bearing 5 is installed between the clamping handle 1 and the fixed sleeve 321, and the snap-fit ​​component 6 is installed on the outside of the clamping handle 1. The outer wall of the snap-fit ​​component 6 is rotatably snapped into the fixed sleeve 321. The bearing 5 and the snap-fit ​​component 6 can ensure that the fixed sleeve 321 is rotatably installed on the outside of the clamping handle 1.

[0043] Furthermore, the transmission component 4 includes a circuit board 41 and a wireless transmitter. The circuit board 41 is fixedly installed inside the clamping handle 1 and is electrically connected to the coil 31. The wireless transmitter is mounted on the circuit board 41 and has a rectifier circuit electrically connected to the wireless transmitter. When the coil 31 supplies current to the circuit board 41, the rectifier circuit on the circuit board 41 rectifies the current, so that the wireless transmitter receives a stable power supply and thus transmits radio frequency signals.

[0044] Another objective of this invention is to provide a method for using a self-generating monitoring device for CNC machine tool tool wear, comprising the following steps:

[0045] Step 1: Install the clamping shank 1 on the machine tool, set the rotation speed of the clamping shank 1 and the feed depth of the tool 2, set the workpiece processing time threshold according to the rotation speed and feed depth of the tool 2, and set the delay alarm threshold. The feed depth of the tool 2 is 15.0 mm, and the rotation speed of the tool 2 is 2500 rpm.

[0046] Step 2: The machine tool drives the clamping shank 1 and the cutting tool 2 to operate on the workpiece and keeps track of the time;

[0047] Step 3: When the workpiece processing time threshold is reached by the tool 2, and the machine tool receives a valid signal, the tool 2 is not worn, and the machine tool drives the clamping handle 1 and the tool 2 to reset and continue running.

[0048] Step 4: If the machine tool does not receive a signal within the delay alarm threshold time, it is determined that the tool 2 is worn and the tool 2 is replaced. That is, the tool 2 is worn and the speed at which the tool 2 processes the workpiece is reduced, which causes the power generation component 3 to be unable to provide power to the transmission component 4, and thus the signal processor on the machine tool cannot receive the signal.

[0049] In particular, the steps in step three where the machine tool receives a valid signal are as follows:

[0050] The bottom of the limiting block 322 is in contact with the top of the workpiece. The workpiece is braked by the limiting block 322 against the fixed sleeve 321. The clamping handle 1 rotates relative to the fixed sleeve 321, causing the clamping handle 1 to drive the coil 31 to rotate relative to the permanent magnet 33. The coil 31 generates an alternating current and sends it to the circuit board 41. The alternating current is sent to the wireless transmitter through the rectifier circuit on the circuit board 41. The wireless transmitter emits a sine wave, and the processing machine tool continuously receives five cycles of the sine wave, which is then considered a valid signal.

[0051] Furthermore, in step four, if no signal is received within five seconds after the tool 2 has been in operation for the workpiece machining time threshold, an alarm will be issued and tool 2 will be replaced.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-powered monitoring device for tool wear in a numerically controlled machine tool, characterized in that, Include: Clamping handle (1); Tool (2), the tool (2) is installed at one end of clamping handle (1); Power generation assembly (3), the power generation assembly (3) is installed outside clamping handle (1), the power generation assembly (3) includes: Coil (31), the coil (31) is fixedly installed outside clamping handle (1), the coil (31) is electrically connected with transmission assembly (4); Integrated housing (32), the integrated housing (32) is rotatably installed outside clamping handle (1); Permanent magnet (33), the permanent magnet (33) is fixedly installed inside integrated housing (32), the permanent magnet (33) is sleeved outside coil (31), the integrated housing (32) includes: Fixed sleeve (321), the fixed sleeve (321) is sleeved outside clamping handle (1), the permanent magnet (33) is fixedly installed inside fixed sleeve (321); Limiting block (322), the limiting block (322) is fixedly connected to the end of fixed sleeve (321), the limiting block (322) is sleeved outside tool (2); Transmission assembly (4), the transmission assembly (4) is installed outside clamping handle (1), the transmission assembly (4) is used for converting the electric signal generated by power generation assembly (3) into radio frequency signal and emitting, whether the tool (2) is worn is judged by detecting whether the radio frequency signal emitted by the transmission assembly (4) is delayed, the transmission assembly (4) includes: Circuit board (41), the circuit board (41) is fixedly installed inside clamping handle (1), the circuit board (41) is electrically connected with coil (31); Wireless transmitter, the wireless transmitter is installed on circuit board (41), the circuit board (41) is provided with rectifier circuit electrically connected with wireless transmitter.

2. A self-generating monitoring device for tool wear of a numerically controlled machine tool according to claim 1, characterized in that, Also include: Bearing (5), the bearing (5) is installed between clamping handle (1) and fixed sleeve (321); Clamping piece (6), the clamping piece (6) is installed outside clamping handle (1), the outer wall of clamping piece (6) is rotatably clamped with fixed sleeve (321).

3. The use of a self-powered monitoring device for tool wear in a CNC machine tool, according to claim 1, characterized in that, Include the following steps: Step one: install clamping handle (1) on the machining tool, set the rotation speed of clamping handle (1) and the depth of tool (2) feed, set the workpiece processing time threshold according to the speed of tool (2) rotation and the depth of feed, and set the delay alarm threshold value; Step two: the machining tool drives clamping handle (1) and tool (2) to work on the workpiece, and timing is carried out; Step three: when tool (2) works to the workpiece processing time threshold, when the machining tool receives the valid signal, then the tool (2) is not worn, the machining tool drives clamping handle (1) and tool (2) to reset and continue to run; Step four: when the machining tool does not receive the signal within the delay alarm threshold value, it is determined that the tool (2) is worn, and the tool (2) is replaced.

4. A method of using a self-generating monitoring device for tool wear in a numerically controlled machine tool according to claim 3, characterized in that, The step of receiving valid signal in the step three of machining tool is as follows: The bottom of the limiting block (322) is in close contact with the top of the workpiece, the workpiece is braked against the fixed sleeve (321) by the limiting block (322), the clamping handle rod (1) rotates relative to the fixed sleeve (321), the clamping handle rod (1) drives the coil (31) to rotate relative to the permanent magnet (33), the coil (31) generates an alternating current transmitted to the circuit board (41), the alternating current is transmitted to the wireless transmitter through the rectifier circuit on the circuit board (41), the wireless transmitter emits a sine wave, and the machining tool receives five cycles of the sine wave in succession, and it is determined as an effective signal.

5. A method of using a self-generating monitoring device of tool wear of a numerically controlled machine tool according to claim 4, characterized in that, The delay alarm threshold in the fourth step is that no signal is received within five seconds after the tool (2) operates to the workpiece processing time threshold, and an alarm is sent to replace the tool (2).

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