A CNC broken tool detection device

Abstract

The utility model belongs to CNC equipment technical field, and specifically is a kind of CNC broken tool detection device, including installation box, and drive part is installed on installation box, and drive part's output end is installed with transmission shaft, and transmission shaft is installed with connecting shaft, and connecting shaft and transmission shaft between are installed with swing bar, and swing bar is adjusted by adjusting structure, and adjusting structure includes adjusting lever, and swing bar is fixedly connected with adjusting lever on it, and connecting shaft is slidably connected with guide block on it, and guide block is fixedly connected with adjusting column on it, and adjusting lever is equipped with multiple adjusting holes on it, and adjusting column is engaged with one adjusting hole in it. Swing bar's position can be adjusted by adjusting lever along connecting shaft sliding, and adjusting column is engaged into corresponding adjusting hole on adjusting lever after adjusting, and multiple adjusting holes provide multiple gear position selection, and the contact part of swing bar and tool can be flexibly changed, avoid the detection precision decline caused by single contact point long-term wear.

Description

Technical Field

[0001] This utility model belongs to the field of CNC equipment technology, specifically a CNC tool breakage detection device. Background Technology

[0002] CNC tool breakage detection devices are key auxiliary equipment in CNC machining equipment used for real-time monitoring of tool working status. They primarily determine whether the tool has broken or chipped during machining by detecting parameters such as tool length, vibration frequency, or contact feedback. Their core function is to prevent workpiece scrap, machine tool damage, and reduced machining efficiency caused by tool failure. Contact-type tool breakage detectors are the mainstream type, typically using mechanical contact for detection. The detection end elastically contacts the tool tip or a designated area, and sensors collect displacement and pressure signals after contact. These signals are compared with preset tool standard parameters to determine whether the tool is in normal working condition.

[0003] However, existing contact-type broken tool detectors use a single-point contact design at the contact end during tool inspection. After long-term use, this contact point is prone to wear, which leads to a gradual decrease in detection accuracy. Furthermore, when it is necessary to adjust the contact position to avoid excessive wear of a single contact point, the relevant components must be loosened by turning the bolts on the motor shaft. This operation is cumbersome and the adjustment efficiency is low, making it impossible to quickly adapt to different detection needs.

[0004] Therefore, a broken tool detection device with higher adjustment efficiency is needed. Summary of the Invention

[0005] Therefore, it is necessary to provide a CNC tool breakage detection device. The position of the swing arm can be adjusted by sliding the adjusting rod along the connecting shaft. After adjustment, the adjusting column is inserted into the corresponding adjusting hole on the adjusting rod. Multiple adjusting holes provide multiple position selections, which can flexibly change the contact part between the swing arm and the tool, and avoid the decrease in detection accuracy caused by long-term wear of a single contact point.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A CNC tool breakage detection device includes a mounting box, on which a driving component is mounted. A transmission shaft is mounted at the output end of the driving component. A connecting shaft is mounted on the transmission shaft. A rocker arm is mounted between the connecting shaft and the transmission shaft. The rocker arm is adjustable via an adjustment structure, which includes an adjustment rod. An adjustment rod is fixedly connected to the rocker arm and slidably connected to the connecting shaft. A guide block is slidably connected to the connecting shaft, and an adjustment column is fixedly connected to the guide block. The adjustment rod has multiple adjustment holes, and the adjustment column engages with one of the adjustment holes.

[0007] Optionally, in one embodiment of the present invention, a connecting column is fixedly connected to the guide block, and the connecting column is slidably connected to the connecting shaft.

[0008] Optionally, in one embodiment of the present invention, a threaded post is threadedly connected to the connecting post, a pull block is fixedly connected to the threaded post, and a spring is fixedly connected between the guide block and the connecting shaft.

[0009] Optionally, in one embodiment of the present invention, the mounting box is detachably connected to a mounting bracket via a mounting structure, the mounting structure including insert plates, and two insert plates are slidably connected to the mounting box.

[0010] Optionally, in one embodiment of the present invention, a mounting block is fixedly connected to the insert plate, the mounting block engages with the mounting bracket, and the mounting block is provided with an inclined surface.

[0011] Optionally, in one embodiment of the present invention, a guide shaft is fixedly connected to the mounting box, and the insert plate is slidably connected to the guide shaft.

[0012] Optionally, in one embodiment of the present invention, a rack is fixedly connected to the insert plate, and a tension spring is fixedly connected between the insert plate and the mounting box.

[0013] Optionally, in one embodiment of the present invention, a guide rail is fixedly connected to the mounting box, and the rack is slidably connected to the guide rail.

[0014] Optionally, in one embodiment of the present invention, a fixed shaft is fixedly connected to the mounting box, and a gear is rotatably connected to the fixed shaft, with the rack meshing with the gear.

[0015] Optionally, in one embodiment of the present invention, a pressing rod is fixedly connected to the rack, and the pressing rod is slidably connected to the mounting box.

[0016] Compared with the prior art, the CNC tool breakage detection device provided by this utility model has the following characteristics: Utilizing mounting blocks, gears, racks, and tension springs, the device can be operated with one hand, allowing for quick assembly and disassembly while maintaining a secure connection. During testing, the drive unit moves a swing arm to contact the cutting tool and monitor its status. When the contact point wears down, the pull block can be pulled, and different adjustment holes can be selected to flexibly change the contact position of the swing arm, avoiding accuracy degradation caused by long-term wear of a single contact point. The spring ensures the position is locked after adjustment. The overall structural design is reasonable, improving the reliability of testing, maintenance efficiency, and ease of operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the connection structure between the driving component and the mounting box in Embodiment 1 of this utility model; Figure 3 for Figure 2 The diagram shows an enlarged view of the structure of region A. Figure 4 for Figure 2 The diagram shows an enlarged view of the structure of region B. Figure 5 This is a schematic diagram of the connection structure between the mounting block and the mounting frame in Embodiment 1 of this utility model; Figure 6 for Figure 5 The diagram shows an enlarged view of the C region structure.

[0019] Reference numerals: Mounting box 1, Adjustment structure 2, Adjustment rod 201, Adjustment hole 202, Guide block 203, Adjustment column 204, Spring 205, Threaded column 206, Pull block 207, Connecting column 208, Mounting structure 3, Insert plate 301, Mounting block 302, Guide shaft 303, Tension spring 304, Rack 305, Guide rail 306, Fixed shaft 307, Gear 308, Pressing rod 309, Driving component 4, Transmission shaft 5, Connecting shaft 6, Swing rod 7, Mounting bracket 8. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0021] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as upper, lower, front, back, left, right, top, bottom, etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0022] To avoid the decrease in detection accuracy caused by long-term wear at a single contact point, a CNC tool breakage detection device was designed, and the specific scheme is as follows: Example

[0023] like Figure 1-6 As shown, a CNC tool breakage detection device includes a mounting box 1, on which a drive component 4, which is a motor, is mounted. A transmission shaft 5 is mounted on the output end of the drive component 4, and a connecting shaft 6 is mounted on the transmission shaft 5. A rocker arm 7 is mounted between the connecting shaft 6 and the transmission shaft 5. The rocker arm 7 is adjusted by an adjustment structure 2, which includes an adjustment rod 201. The adjustment rod 201 is fixedly connected to the rocker arm 7 and is slidably connected to the connecting shaft 6. A guide block 203 is slidably connected to the connecting shaft 6, and an adjustment column 204 is fixedly connected to the guide block 203. The adjustment rod 201 is provided with multiple adjustment holes 202, and the adjustment column 204 engages with one of the adjustment holes 202.

[0024] A connecting post 208 is fixedly connected to the guide block 203. The connecting post 208 is slidably connected to the connecting shaft 6. A threaded post 206 is threadedly connected to the connecting post 208. Pulling the pull block 207 causes the connecting post 208 to slide outward, so that the guide block 203 drives the adjusting post 204 to slide synchronously. This causes the adjusting post 204 to disengage from the current adjusting hole 202 of the adjusting rod 201, and then pushes the adjusting rod 201 to slide on the connecting shaft 6, thereby adjusting the position of the swing arm 7.

[0025] After adjustment, the adjusting column 204 is inserted into the corresponding adjusting hole 202 on the adjusting rod 201. The multiple adjusting holes 202 on the adjusting rod 201 provide multiple position selections, which can flexibly change the contact part between the rocker arm 7 and the tool, avoiding the decrease in detection accuracy caused by long-term wear of a single contact point. A spring 205 is fixedly connected between the guide block 203 and the connecting shaft 6. The spring 205 ensures that the adjusting column 204 and the adjusting hole 202 are firmly engaged, preventing loosening and displacement. A pull block 207 is fixedly connected to the threaded column 206.

[0026] Mounting box 1 is detachably connected to mounting bracket 8 via mounting structure 3. Mounting structure 3 includes insert plate 301. Two insert plates 301 are slidably connected to mounting box 1. Mounting block 302 is fixedly connected to insert plate 301. Mounting block 302 engages with mounting bracket 8. Mounting block 302 has an inclined surface. Guide shaft 303 is fixedly connected to mounting box 1. Insert plate 301 is slidably connected to guide shaft 303. Rack 305 is fixedly connected to insert plate 301. Tension spring 304 is fixedly connected between insert plate 301 and mounting box 1. Guide rail 306 is fixedly connected to mounting box 1. Rack 305 is slidably connected to guide rail 306. Fixed shaft 307 is fixedly connected to mounting box 1. Gear 308 is rotatably connected to fixed shaft 307. Rack 305 meshes with gear 308. Pressing rod 309 is fixedly connected to rack 305. Pressing rod 309 is slidably connected to mounting box 1.

[0027] Mounting bracket 8 is pre-fixed to a suitable position on the machine tool worktable. During assembly, mounting bracket 8 is aligned with the corresponding mounting position of mounting box 1. The inclined surface on mounting block 302 will push the two insert plates 301 to slide along guide shaft 303 under the pressure of mounting bracket 8. The rack 305 on insert plate 301 moves smoothly along guide rail 306 and drives gear 308 to rotate around fixed shaft 307. At the same time, tension spring 304 between insert plate 301 and mounting box 1 is stretched. When mounting bracket 8 reaches the preset mounting position, tension spring 304 is released. The elastic force resets the insert plate 301, allowing the mounting block 302 to precisely engage in the slot of the mounting bracket 8, thus quickly fixing the device. The meshing of the gear 308 and the double rack 305 ensures that the two insert plates 301 move synchronously. The inclined surface of the mounting block 302 facilitates assembly, and the tension spring 304 ensures the stability of the connection. During subsequent disassembly, simply pressing either of the pressing rods 309 will cause the two insert plates 301 to disengage synchronously from the slot via the transmission of the rack 305 and the gear 308, making the operation convenient.

[0028] Instructions for use: First, when installing the broken tool detection device in a CNC machine tool machining scenario, the mounting bracket 8 is pre-fixed at a suitable position on the machine tool worktable. During assembly, the mounting bracket 8 is aligned with the corresponding mounting position of the mounting box 1. The inclined surface on the mounting block 302 will push the two insert plates 301 to slide along the guide shaft 303 under the pressure of the mounting bracket 8. The rack 305 on the insert plate 301 moves smoothly along the guide rail 306 and drives the gear 308 to rotate around the fixed shaft 307. At the same time, the tension spring 304 between the insert plate 301 and the mounting box 1 is stretched. When the mounting bracket 8 reaches the preset installation position, the tension spring 304 releases its elasticity to reset the insert plate 301, so that the mounting block 302 is accurately inserted into the slot of the mounting bracket 8, completing the rapid fixation of the device.

[0029] The meshing of gear 308 and double rack 305 ensures that the two insert plates 301 move synchronously. The inclined surface of the mounting block 302 makes assembly easier, and the tension spring 304 ensures the stability of the connection. When disassembling later, simply press either of the pressing rods 309, and the two insert plates 301 will be driven to disengage from the slot synchronously through the transmission of rack 305 and gear 308, making the operation convenient and efficient.

[0030] After assembly, upon startup, the drive shaft 5 drives the connecting shaft 6 to rotate, which in turn drives the rocker arm 7 to swing. Under normal conditions, the contact detection end of the rocker arm 7 will contact the preset position of the tool. At this time, the swing stroke of the rocker arm 7 is the standard stroke. If the tool breaks, the contact detection end of the rocker arm 7 will not be able to contact the tool, and its swing stroke will change significantly. This change in stroke will be captured by the sensing component linked to the rocker arm 7 and transmitted to the CNC machine tool control system. The system will then determine that the tool has broken and issue a stop command. When it is necessary to adjust the contact position between the rocker arm 7 and the tool, simply pull the pull block 207 to drive the connecting column 208 to slide outward, thus adjusting the guide. Block 203 drives the adjusting column 204 to slide synchronously, disengaging the adjusting column 204 from the current adjusting hole 202 of the adjusting rod 201. Subsequently, it pushes the adjusting rod 201 to slide on the connecting shaft 6, thereby adjusting the position of the rocker arm 7. After adjustment, the adjusting column 204 is engaged with the corresponding adjusting hole 202 on the adjusting rod 201. The multiple adjusting holes 202 on the adjusting rod 201 provide multiple position selections, which can flexibly change the contact part between the rocker arm 7 and the tool, avoiding the decrease in detection accuracy caused by long-term wear of a single contact point. The spring 205 ensures that the adjusting column 204 and the adjusting hole 202 are firmly engaged, preventing loosening and displacement during operation.

[0031] The detection device of this solution is equipped with an adjustment rod 201 with a multi-position adjustment hole 20 and an adjustment column 204 with a spring 205. The user can quickly change the contact point between the swing rod 7 and the tool, so that after a certain contact part is worn due to long-term operation, it can be replaced to a new contact point in time, thereby maintaining the accuracy of detection over a long period of time.

[0032] The installation structure 3, gear 308, rack 305 and tension spring 304 are designed so that during installation, simply align the mounting box 1 with the mounting bracket 8 and push it in to automatically lock it in place. During disassembly, pressing either side of the pressing rod 309 will cause both mounting blocks 302 to detach simultaneously, making disassembly and assembly convenient and saving time for maintenance or adjustment. The tension spring 304 ensures the connection between the mounting block 302 and the mounting bracket 8 slot, reducing shaking during the testing process. Example

[0033] In this embodiment, the structure of the detection device is basically the same as that of Embodiment 1, except that the double-sided insert plates 301 and the inclined surface are retained, while the gears and racks are removed. A U-shaped linkage frame replaces the original gears and racks, connecting the ends of the two insert plates 301. Pressing either pressing rod 309 will cause the two insert plates to move synchronously via the linkage frame, resulting in a simpler structure and improved reliability.

[0034] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A CNC tool breakage detection device, comprising a mounting box, a driving component mounted on the mounting box, a transmission shaft mounted on the output end of the driving component, a connecting shaft mounted on the transmission shaft, and a rocker arm mounted between the connecting shaft and the transmission shaft, characterized in that: The swing arm is adjusted by an adjustment structure, which includes an adjustment rod. The adjustment rod is fixedly connected to the swing arm and slidably connected to a connecting shaft. A guide block is slidably connected to the connecting shaft and an adjustment column is fixedly connected to the guide block. The adjustment rod is provided with multiple adjustment holes, and the adjustment column engages with one of the adjustment holes.

2. The CNC tool breakage detection device according to claim 1, characterized in that: A connecting column is fixedly connected to the guide block, and the connecting column is slidably connected to the connecting shaft.

3. The CNC tool breakage detection device according to claim 2, characterized in that: A threaded post is threaded onto the connecting post, a pull block is fixedly connected to the threaded post, and a spring is fixedly connected between the guide block and the connecting shaft.

4. The CNC tool breakage detection device according to claim 1, characterized in that: The mounting box is detachably connected to a mounting bracket via a mounting structure, the mounting structure including insert plates, and two insert plates are slidably connected to the mounting box.

5. The CNC tool breakage detection device according to claim 4, characterized in that: An installation block is fixedly connected to the insert plate, the installation block engages with the mounting bracket, and the installation block has an inclined surface.

6. The CNC tool breakage detection device according to claim 5, characterized in that: A guide shaft is fixedly connected to the mounting box, and the insert plate is slidably connected to the guide shaft.

7. A CNC tool breakage detection device according to claim 6, characterized in that: A rack is fixedly connected to the insert plate, and a tension spring is fixedly connected between the insert plate and the mounting box.

8. A CNC tool breakage detection device according to claim 7, characterized in that: The mounting box is fixedly connected to a guide rail, and the rack is slidably connected to the guide rail.

9. A CNC tool breakage detection device according to claim 8, characterized in that: A fixed shaft is fixedly connected to the mounting box, and a gear is rotatably connected to the fixed shaft, with the rack meshing with the gear.

10. A CNC tool breakage detection device according to claim 9, characterized in that: A pressing rod is fixedly connected to the rack, and the pressing rod is slidably connected to the mounting box.

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