Contact type broken tool detection device for numerical control lathe

Abstract

The utility model relates to the technical field of numerical control lathe tool detection, and discloses a contact type broken tool detection device for a numerical control lathe, which comprises a main body, a telescopic rod is clamped on one side of the main body, a butt joint pipe is arranged on the other side of the main body, a communication board is arranged on one side of the butt joint pipe, and an additional block is arranged on the outer wall of the communication board. A balance plate is arranged at the bottom of the additional block, and the top of the balance plate is in threaded connection with a control plate. According to the contact type broken tool detection device for the numerical control lathe, the main body, the telescopic rod and the butt joint pipe are arranged in a matched mode, so that the device can be accurately positioned to an optimal detection point of a tool movement path, and the detection accuracy is improved whether in touch detection in a normal machining stroke of a tool or in-time sensing of a broken part when the tool is broken. Therefore, a reliable information source is provided for subsequent cutter breakage judgment, misjudgment or missed judgment caused by detection position deviation is effectively avoided, and the cutter breakage detection accuracy of the whole device is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathe tool detection technology, specifically a contact-type broken tool detection device for CNC lathes. Background Technology

[0002] Tool breakage is a common problem in CNC lathe machining, leading not only to workpiece scrap and machine tool damage but also reduced production efficiency. Current CNC lathe tool breakage detection devices have several shortcomings. Non-contact detection methods, such as optical and electromagnetic sensors, while avoiding direct contact with the tool, are susceptible to interference from oil, chips, and other environmental factors, affecting accuracy and reliability. Traditional contact detection methods, such as manual periodic tool checks or simple mechanical limit switch checks, suffer from poor timeliness and inability to accurately detect minute cracks or partial breakage, failing to meet the demands of modern high-precision machining. Compatibility and versatility are also issues; most tool breakage detection devices are designed for specific CNC lathe models or specifications, resulting in poor versatility. Companies need to purchase multiple models of equipment when configuring detection devices for different lathes, increasing costs and management complexity. Furthermore, some detection devices may occupy significant space during installation and use, affecting the normal machining path of the tool or increasing machine tool vibration, thus negatively impacting machining accuracy and efficiency.

[0003] However, existing technologies have the following problems in practical use:

[0004] The overall device cannot effectively prevent workpiece scrap and machine tool damage caused by tool breakage, thus reducing processing quality and production efficiency. Once tool breakage is detected, the device cannot automatically send a stop signal to the CNC lathe control system and trigger the alarm device, resulting in poor overall practicality. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To overcome the aforementioned shortcomings of the prior art, this utility model provides a contact-type tool breakage detection device for CNC lathes, solving the problems in the prior art:

[0007] The overall device cannot effectively prevent workpiece scrap and machine tool damage caused by tool breakage, thus reducing processing quality and production efficiency. Once tool breakage is detected, the device cannot automatically send a stop signal to the CNC lathe control system and trigger the alarm device, resulting in poor overall practicality.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: a contact-type broken tool detection device for CNC lathes, comprising a main body, a telescopic rod snapped onto one side of the main body, a connecting pipe provided on the other side of the main body, a communication board provided on one side of the connecting pipe, an additional block provided on the outer wall of the communication board, a balance plate provided at the bottom of the additional block, and a control plate threadedly connected to the top of the balance plate.

[0010] Furthermore, a reinforcing ring is threaded to one side of the main body, and a sleeve is snapped onto the other side of the main body, with one side of the sleeve threaded to one side of the connecting pipe.

[0011] Furthermore, the outer wall of the telescopic rod is inserted into the inner wall of the reinforcing ring, and a detection probe is inserted into one side of the telescopic rod.

[0012] Furthermore, a communication line is snapped onto one side of the connector, a protective sleeve is fitted onto the outer wall of the communication line, and an insertion head is snapped onto one side of the communication line.

[0013] Furthermore, the outer wall of the communication board is inserted into one side of the insertion head, and a display screen is snapped onto the top of the communication board.

[0014] Furthermore, the outer wall of the additional block is threaded with bolts, which pass through the interior of the additional block and are threaded to the outer wall of the communication board.

[0015] Furthermore, a support rod is inserted into one side of the balance plate, and the outer wall of the support rod is engaged with the interior of the additional block.

[0016] Furthermore, a buffer plate is snapped onto the top of the control board, and the top of the buffer plate is snapped onto the bottom of the communication board.

[0017] (III) Beneficial Effects

[0018] This utility model provides a contact-type broken tool detection device for CNC lathes, which has the following features:

[0019] Beneficial effects:

[0020] This contact-type broken tool detection device for CNC lathes, through the coordinated design of the main body, telescopic rod, and connecting pipe, can accurately locate the optimal detection point on the tool's movement path. Whether it's contact detection during normal tool machining stroke or timely sensing of the broken portion when the tool breaks, it can complete the task efficiently and accurately, providing a reliable information source for subsequent broken tool judgment. This effectively avoids misjudgments or omissions caused by detection position deviations, greatly improving the accuracy of the entire device in detecting tool breakage. Through the coordinated design of the communication board, auxiliary blocks, balance plate, and control board, the impact of external factors such as vibration and impact during CNC lathe machining on the communication board and control board is effectively reduced. The control board can accurately trigger relevant control signals, send stop commands to the CNC lathe's control system, and activate the alarm device, realizing an automated process for broken tool detection and handling. This reduces manual intervention, improves the level of automation and safety in production, and ensures the accuracy and reliability of data transmission and processing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the main structure of the present utility model;

[0023] Figure 3 This is a schematic diagram of the butt joint structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the additional block structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the communication board structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the control board structure of this utility model.

[0027] In the diagram: 1. Main body; 2. Telescopic rod; 3. Connecting pipe; 4. Communication board; 5. Additional block; 6. Balance plate; 7. Control board; 8. Reinforcing ring; 9. Sleeve; 10. Detection probe; 11. Communication line; 12. Protective sleeve; 13. Insertion head; 14. Display screen; 15. Bolt; 16. Support rod; 17. Buffer plate. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figures 1 to 6This utility model embodiment provides a contact-type broken tool detection device for CNC lathes. This contact-type broken tool detection device for CNC lathes is applied to CNC lathe machining scenarios. In this embodiment, the structure of the broken tool detection device is improved to give it the advantages of safety and convenience.

[0030] Example 1:

[0031] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a contact-type broken tool detection device for CNC lathes, comprising a main body 1, a telescopic rod 2 snapped onto one side of the main body 1, a reinforcing ring 8 threaded onto one side of the main body 1, a sleeve 9 snapped onto the other side of the main body 1, one side of the sleeve 9 threadedly connected to one side of the connecting pipe 3, the outer wall of the telescopic rod 2 being inserted into the inner wall of the reinforcing ring 8, and a detection probe 10 being inserted into one side of the telescopic rod 2. Therefore, by using a high-strength metal material, such as stainless steel or aluminum alloy, and having an annular groove or threaded structure on its inner wall that matches the outer wall of the telescopic rod 2, a tight and stable insertion fit is achieved. During installation, the outer wall of the telescopic rod 2 is aligned with the inner wall of the reinforcing ring 8 and slowly inserted. By rotating the main body 1 or the reinforcing ring 8, the threaded connection between the two is tightened, thereby ensuring that the telescopic rod 2 remains in place during position adjustment. There will be no shaking or displacement, ensuring the detection accuracy of the detection probe 10. During connection, align the threaded parts of the sleeve 9 and the connecting pipe 3, and rotate the sleeve 9 to gradually tighten it onto the connecting pipe 3, forming a stable connection channel. This provides a stable structural foundation for the installation of components such as the communication line 11, ensuring the stability and reliability of signal transmission, and ensuring that the detection probe 10 will not loosen or fall off during use. The detection probe 10 adopts a high-precision five-way micro switch sensor. Its internal micro switch has high sensitivity and long life characteristics, and can accurately sense the contact and breakage of the tool. When the tool is normally finished, its tip or body touches the micro switch. Once the tool breaks, the broken part can quickly touch the micro switch, changing its state and generating a corresponding electrical signal, providing a precise trigger signal source for tool breakage detection.

[0032] Example 2:

[0033] Please see Figure 3 and Figure 5 In order to reduce the processing interruption time caused by tool problems and improve the continuity and overall efficiency of processing, a device docking pipe 3 and a communication board 4 are set up.

[0034] On the other side of the main body 1, there is a connecting pipe 3. On one side of the connecting pipe 3, there is a communication board 4. A communication line 11 is snapped into one side of the connecting pipe 3. A protective sleeve 12 is fitted over the outer wall of the communication line 11. An insertion head 13 is snapped into one side of the communication line 11. The outer wall of the communication board 4 is inserted into one side of the insertion head 13. A display screen 14 is snapped into the top of the communication board 4. Therefore, a well-shielded cable, such as a twisted-pair cable or coaxial cable with a metal shielding layer, is used for the communication line 11 to reduce the impact of external electromagnetic interference on signal transmission. The protective sleeve 12 is made of wear-resistant and corrosion-resistant rubber or plastic material, and its thickness is determined according to the protection requirements. The protective sleeve 12 can provide… The communication line 11 is effectively protected from damage caused by oil, chips, and other factors in the processing environment, extending its service life and ensuring the stability of signal transmission. The insertion head 13 adopts a standard electrical connection plug, and its insertion point with the outer wall of the communication board 4 is equipped with an anti-loosening structure, such as a snap ring or threaded fastening device, to ensure a stable and reliable connection between the insertion head 13 and the communication board 4 during use, preventing poor contact due to vibration or other reasons, thereby ensuring accurate data transmission. The display screen 14 can clearly display the tool status information, test results, and related parameter settings, making it convenient for operators to monitor the tool status in real time and take timely actions.

[0035] Example 3:

[0036] Please see Figure 1 , Figure 4 and Figure 6 To avoid errors in tool breakage detection due to communication failures or data errors, the device includes an additional block 5, a balance plate 6, and a control plate 7.

[0037] An additional block 5 is provided on the outer wall of the communication board 4. A balance plate 6 is provided at the bottom of the additional block 5. A control plate 7 is threadedly connected to the top of the balance plate 6. A bolt 15 is threadedly connected to the outer wall of the additional block 5, passing through the interior of the additional block 5 and threadedly connected to the outer wall of the communication board 4. A support rod 16 is inserted into one side of the balance plate 6, and the outer wall of the support rod 16 is engaged with the interior of the additional block 5. A buffer plate 17 is engaged with the top of the control plate 7, and the top of the buffer plate 17 is engaged with the bottom of the communication board 4. Therefore, by adjusting the tightness of the bolt 15, the communication board 4 can be precisely adjusted. The tightness and relative position of the connection between the additional blocks 5 ensure the stability of the communication board 4 after installation, preventing displacement or damage to the communication board 4 due to vibration or impact, thereby ensuring the reliability of data transmission and processing. After the support rod 16 is inserted, it is kept stable by the limiting effect of the snap ring or the snap groove. The support rod 16 is made of metal, such as aluminum alloy or stainless steel, and its length is determined according to the structural design and balance requirements of the device. The top of the control board 7 is provided with a snap groove or snap protrusion structure that matches the buffer plate 17. The buffer plate 17 is made of rubber or silicone material with good buffering performance.

[0038] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0039] In this invention, the working steps of the device are as follows:

[0040] First, place the main body 1 in the predetermined installation position on the CNC lathe. Based on the lathe's structure and the tool's movement range, determine the installation angle and position of the main body 1. Using the fixtures and brackets in the installation and fixing module (not individually labeled), which are part of the overall installation and fixing structure of the device, firmly fix the main body 1 to the CNC lathe, ensuring that the main body 1 will not shift or shake during subsequent operation. Tightly install the reinforcing ring 8 on one side of the main body 1 using a threaded connection, ensuring that the inner wall of the reinforcing ring 8 and the outer wall of the telescopic rod 2 form a stable insertion fit. During installation, ensure that the thread tightening of the reinforcing ring 8 is moderate, providing stable support for the telescopic rod 2 without damaging the components due to over-tightening. Then, snap the sleeve 9 in place. On the other side of the main body 1, one side of the sleeve 9 is securely fixed to the connecting pipe 3 via a threaded connection, ensuring a stable connection between the connecting pipe 3 and the main body 1 and a smooth signal transmission channel. Based on the shape, size, and machining requirements of the tool, the position of the telescopic rod 2 within the reinforcing ring 8 is manually adjusted. By rotating or pushing / pulling the telescopic rod 2, it extends or retracts by a certain length, thereby precisely positioning the detection probe 10, inserted on one side of the telescopic rod 2, to the optimal detection point on the tool's movement path. During the adjustment process, auxiliary tools such as micrometers or positioning fixtures can be used to ensure the accurate distance and relative position between the detection probe 10 and the tool. After the detection probe 10 is properly positioned, the connection stability between the telescopic rod 2 and the reinforcing ring 8 is checked again. To ensure the secure connection between the probe 10 and the telescopic rod 2, preventing displacement of the probe 10 due to vibration or other factors during subsequent operation, the communication cable 11 is secured to one side of the connecting pipe 3. The plug or connector of the communication cable 11 is ensured to fit tightly with the locking part of the connecting pipe 3 without any looseness. The communication cable 11 is then passed through the protective sleeve 12 to protect it from external interference such as oil or chips. The insertion head 13 on one side of the communication cable 11 is then accurately inserted into the outer wall interface of the communication board 4, connecting the communication board 4 to the signal transmission line of the entire detection device. During insertion, it is crucial to ensure a complete fit between the insertion head 13 and the interface of the communication board 4, and to secure the insertion head 13 using a fixing device at the interface, such as a snap ring or threaded fastening structure. Secure the connection firmly to prevent poor contact due to vibration. After connection, use professional electrical testing equipment to check the communication line 11, including testing parameters such as continuity and signal attenuation, to ensure that the communication line 11 can stably and efficiently transmit detection signals. Turn on the power to the CNC lathe, but do not start machining operations yet. Check whether the power supply of each component is normal, such as whether the power indicator lights of the sensors, communication board 4, control board 7, etc. in the main body 1 are lit normally. Perform a functional test on the detection probe 10. Using a simulated tool or other suitable testing tool, slowly approach the detection probe 10 and observe whether the communication board 4 can receive the signal from the detection probe 10 and correctly display the relevant information on the display screen 14 attached to the top of the communication board 4.If the detected touch signal or signal strength is not displayed on the display screen 14 or displays abnormal information, it is necessary to check the signal transmission line between the detection probe 10 and the communication board 4, and whether the detection probe 10 itself is functioning properly. The signal interaction between the control board 7 and the communication board 4 should also be tested by sending a simulated detection signal from the communication board 4 to the control board 7 to check whether the control board 7 can correctly receive and process the signal. For example, it should determine whether to trigger the corresponding control signal, such as an alarm signal or a stop signal, according to the preset logic. If the control board 7 does not respond normally, it is necessary to check the connection between the control board 7 and the communication board 4. The electrical connections between boards 4 and the program settings inside control board 7 are all part of the process. When the CNC lathe begins normal machining operation, the cutting tool performs cutting motion according to the predetermined machining process. During the tool's movement, if the tool completes a stroke normally, its tip or body will touch the detection probe 10. The five-way micro-switch sensor inside the detection probe 10 will generate a normal trigger signal. This trigger signal is transmitted to the communication board 4 through the wiring inside the telescopic rod 2. The signal processing and analysis module in the communication board 4 then begins to work. The signal amplification and filtering circuit is integrated inside the communication board 4 and is not separately labeled. The weak electrical signal is amplified and filtered to remove noise and interference. Then, the data acquisition and conversion unit, also integrated within the communication board 4, converts the processed analog signal into a digital signal. The microprocessor, also integrated within the communication board 4, performs real-time analysis and processing of the digital signal based on a built-in broken tool detection algorithm. Since the contact is normal and the signal does not exceed the preset abnormal threshold, the microprocessor determines the tool is normal and does not issue a broken tool alarm signal, allowing the CNC lathe to continue machining. If the tool breaks during machining, the broken part will trigger the micro-motion sensor in the detection probe 10. The switch generates an abnormal electrical signal, which is processed by the aforementioned signal processing and analysis module. When the microprocessor detects that the signal exceeds the set cutting force change threshold and the trigger state of the microswitch sensor matches the characteristics of a broken tool, it determines that the tool has broken. Once the microprocessor determines that the tool has broken, the control and alarm module immediately activates. The control board 7 quickly sends a stop signal to the CNC lathe's control system, stopping the machine tool's spindle rotation and the feed system, thus preventing further losses due to the tool breakage, such as further damage to the workpiece or collisions with machine tool components.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A contact-type broken tool detection device for CNC lathes, comprising a main body (1), characterized in that: A telescopic rod (2) is snapped onto one side of the main body (1), and a connecting pipe (3) is provided on the other side of the main body (1). A communication board (4) is provided on one side of the connecting pipe (3). An additional block (5) is provided on the outer wall of the communication board (4). A balance plate (6) is provided at the bottom of the additional block (5). A control plate (7) is threadedly connected to the top of the balance plate (6).

2. The contact-type broken tool detection device for CNC lathes according to claim 1, characterized in that: A reinforcing ring (8) is threadedly connected to one side of the main body (1), and a sleeve (9) is snapped onto the other side of the main body (1). One side of the sleeve (9) is threadedly connected to one side of the connecting pipe (3).

3. The contact-type broken tool detection device for CNC lathes according to claim 2, characterized in that: The outer wall of the telescopic rod (2) is inserted into the inner wall of the reinforcing ring (8), and a detection probe (10) is inserted into one side of the telescopic rod (2).

4. The contact-type broken tool detection device for CNC lathes according to claim 1, characterized in that: A communication line (11) is snapped onto one side of the connector (3), a protective sleeve (12) is fitted onto the outer wall of the communication line (11), and an insertion head (13) is snapped onto one side of the communication line (11).

5. A contact-type broken tool detection device for CNC lathes according to claim 4, characterized in that: The outer wall of the communication board (4) is inserted into one side of the insertion head (13), and the top of the communication board (4) is snapped with a display screen (14).

6. The contact-type broken tool detection device for CNC lathes according to claim 1, characterized in that: The outer wall of the additional block (5) is threaded with a bolt (15), which passes through the interior of the additional block (5) and is threaded to the outer wall of the communication board (4).

7. A contact-type broken tool detection device for CNC lathes according to claim 1, characterized in that: A support rod (16) is inserted into one side of the balance plate (6), and the outer wall of the support rod (16) is engaged with the interior of the additional block (5).

8. A contact-type broken tool detection device for CNC lathes according to claim 1, characterized in that: The top of the control board (7) is snapped with a buffer plate (17), and the top of the buffer plate (17) is snapped with the bottom of the communication board (4).

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